CN112193235B

CN112193235B - Control method, device and equipment of extended range electric vehicle and storage medium

Info

Publication number: CN112193235B
Application number: CN202010993435.6A
Authority: CN
Inventors: 郭冲; 高泽荣
Original assignee: United Automotive Electronic Systems Co Ltd
Current assignee: United Automotive Electronic Systems Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2022-02-08
Anticipated expiration: 2040-09-21
Also published as: CN112193235A

Abstract

The application discloses control method, device, equipment and storage medium of an extended range electric vehicle, and the method comprises the following steps: acquiring the carbon capacity of a particle trap GPF of the extended range electric vehicle; when the carbon loading is higher than the first carbon loading, acquiring the speed of the extended range electric vehicle and the state of charge of a storage battery of the extended range electric vehicle; determining whether an engine of the extended range electric vehicle needs to be started based on the carbon loading and the state of charge; when it is determined that it is necessary to start the engine, the power of the engine is determined among at least two preset powers based on the speed. According to the method and the device, when the carbon load of the GPF is higher than the first carbon load, whether the engine needs to be started is determined based on the carbon load and the charge state, when the engine needs to be started is determined, the power of the engine is determined based on the speed, and the carbon load is considered due to the starting condition of the engine, so that the GPF can be regenerated by starting the engine under the conditions that the carbon load is higher and the starting condition is met, and the safety performance is improved.

Description

Control method, device and equipment of extended range electric vehicle and storage medium

Technical Field

The present disclosure relates to the field of vehicle control technologies, and in particular, to a method, an apparatus, a device, a storage medium, and an electric vehicle for controlling a range extended electric vehicle (extended electric vehicle).

Background

With the increasing shortage of energy sources, new energy source motor vehicles are rapidly developed and widely applied in the near future. As one of the new energy vehicles, the extended range electric vehicle has the advantage of lower fuel consumption compared to the conventional fuel-oil-type vehicle, and has the advantage of longer driving range compared to the pure electric vehicle.

The range-extended electric vehicle runs by means of the power of an electric motor, and the energy for driving the electric motor is from a range extender (comprising an engine and a generator) and/or a storage battery. The range extender comprises an engine and a generator, wherein the engine is used for driving the generator to generate electricity, and the engine does not participate in the operation of a direct drive vehicle.

At present, in order to reduce the particulate matter emission in the exhaust gas of vehicles, more and more automobiles are provided with a particulate filter (GPF) in the exhaust gas after-treatment device, when the particulate matter (which is usually a carbon-containing compound and is expressed in the form of carbon load, and the unit of the carbon load can be gram (g)) accumulated in the GPF reaches a certain degree, the exhaust pressure of the exhaust system of the engine is increased, and the performance (such as oil consumption, power, torque and the like) of the engine and the safety of parts are adversely affected; additionally, if the carbon loading of the GPF is high and the temperature inside the GPF is high, engine shut-down or shut-down conditions may occur, which may cause the temperature of the GPF to exceed its endurance limit, due to the large amount of air entering the GPF, causing severe particulate matter combustion.

In the related art, the extended range electric vehicle controls the range extender by executing a control strategy through the control device, and generally, the control strategy of the range extender may include: (1) controlling the range extender to work at constant power and fixed rotating speed; or, (2) the power of the engine is controlled to change along with the power demand of the electric vehicle.

However, the control strategy of the extended range electric vehicle provided in the related art does not consider the carbon load of the GPF, and therefore, for the extended range electric vehicle provided with the GPF, the control strategy provided in the related method has a safety hazard, and there is a certain possibility that the GPF and/or other parts are damaged due to the excessively high carbon load of the GPF, and the safety performance of the extended range electric vehicle is poor.

Disclosure of Invention

The application provides a control method, a control device, equipment, a storage medium and an electric vehicle of an extended range electric vehicle, which can solve the problem of poor safety performance caused by the fact that carbon capacity of GPF is not considered in a control strategy of the extended range electric vehicle provided in the related technology.

In one aspect, an embodiment of the present application provides a control method for an extended range electric vehicle, including:

acquiring the carbon capacity of GPF of the extended range electric vehicle;

acquiring a speed of the extended range electric vehicle and a state of charge (SOC) of a battery of the extended range electric vehicle when the carbon loading is higher than a first carbon loading;

determining whether an engine of the extended range electric vehicle needs to be started based on the carbon loading and the state of charge;

when it is determined that it is necessary to start the engine, the power of the engine is determined based on the speed among at least two preset powers, which are power values calculated based on the temperature of the GPF and the fuel economy of the engine.

Optionally, the determining whether to start the engine of the extended range electric vehicle based on the carbon loading and the state of charge includes:

determining whether the engine needs to be started or not based on a carbon loading interval and a state of charge interval, wherein the carbon loading interval is an interval to which the carbon loading belongs in at least two carbon loading intervals, and the state of charge interval is an interval to which the state of charge belongs in at least two state of charge intervals;

said determining the power of said engine based on said speed among at least two preset powers comprises:

determining the power of the engine in at least two preset powers based on a speed interval, wherein the speed interval belongs to at least two speed intervals.

Optionally, the at least two carbon loading intervals include a first carbon loading interval, a second carbon loading interval, and a third carbon loading interval;

the first carbon capacity interval is an interval in which a carbon capacity greater than the first carbon capacity and less than a second carbon capacity is located, the second carbon capacity interval is an interval in which a carbon capacity greater than the second carbon capacity and less than a third carbon capacity is located, and the third carbon capacity interval is an interval in which a carbon capacity greater than the third carbon capacity is located;

wherein the first carbon loading is less than the second carbon loading, which is less than the third carbon loading.

Optionally, the at least two speed intervals include a first speed interval and a second speed interval;

the first speed interval is an interval where the speed greater than the first speed is located, and the second speed interval is an interval where the speed greater than the second speed is located;

wherein the first speed is greater than the second speed.

Optionally, the at least two preset powers include a first power, a second power, and a third power;

wherein the first power is less than the second power, which is less than the third power.

Optionally, when the engine is operating at the second power, the temperature of the GPF is greater than the temperature of the engine when operating at the first power;

when the engine is operating at the third power, the temperature of the GPF is greater than when the engine is operating at the second power.

Optionally, the determining whether the engine needs to be started based on the carbon loading interval and the state of charge interval includes:

when the carbon loading capacity belongs to the first carbon loading capacity interval, determining whether a first starting condition is met according to the charge state, wherein the first starting condition is that the engine needs to be started to meet the charge state requirement when the loading capacity belongs to the first carbon loading capacity interval;

when the first opening condition is satisfied, the determining the power of the engine among at least two preset powers based on the speed section includes:

determining whether the speed belongs to the first speed interval; determining the power of the engine to be the second power when the speed belongs to the first speed interval.

Optionally, the determining whether the first starting condition is met according to the state of charge includes:

determining whether the state of charge is greater than a first state of charge threshold;

when the state of charge is not greater than the first state of charge threshold, determining whether the state of charge is greater than a second state of charge threshold, the first state of charge threshold being greater than the second state of charge threshold;

determining that the first turn-on condition is satisfied when the state of charge is not greater than the second state of charge threshold.

Optionally, after determining whether the speed belongs to the first speed interval, the method further includes:

determining the power of the engine as the first power when the speed does not belong to the first speed section.

Optionally, after determining whether the state of charge of the battery of the extended range electric vehicle is greater than a first state of charge threshold, the method further includes:

and when the state of charge is larger than the first state of charge threshold value, controlling the extended range electric vehicle to run in an electric driving mode, wherein the electric driving mode is a mode for enabling the extended range electric vehicle to run without starting an engine.

Optionally, after determining whether the state of charge is greater than a second state of charge threshold, the method further includes:

when the state of charge is greater than the second state of charge threshold, determining whether the extended range electric vehicle is in the electric drive mode;

when the extended range electric vehicle is in the electric driving mode, the extended range electric vehicle is kept in the electric driving mode.

Optionally, after determining whether the extended range electric vehicle is in the electric drive mode, the method further includes:

when the extended range electric vehicle is not in the electric driving mode, determining whether the speed belongs to the first speed interval;

determining the power of the engine to be the second power when the speed belongs to the first speed interval.

when the carbon loading capacity belongs to the second carbon loading capacity interval, determining whether a second starting condition is met according to the charge state, wherein the second starting condition is that the charge state of the engine needs to be started when the loading capacity belongs to the second carbon loading capacity interval, and the requirement of the second starting condition on the charge state is lower than that of the first starting condition;

when the second opening condition is satisfied, the determining the power of the engine among at least two preset powers based on the speed section includes:

determining whether the speed belongs to the second speed interval; determining whether the speed belongs to the first speed section when the speed belongs to the second speed section; determining the power of the engine to be the third power when the speed belongs to the first speed section.

Optionally, the determining whether a second starting condition is met according to the state of charge includes:

determining whether the state of charge is greater than a third state of charge threshold, the third state of charge threshold being greater than the second state of charge threshold;

when the state of charge is not greater than the third state of charge threshold, determining whether the state of charge is greater than a fourth state of charge threshold, the third state of charge threshold being greater than the fourth state of charge threshold;

determining that the second turn-on condition is satisfied when the state of charge is not greater than the fourth state of charge threshold.

Optionally, after determining whether the speed belongs to the second speed interval, the method further includes:

determining the power of the engine as the first power when the speed does not belong to the second speed interval.

determining the power of the engine to be the second power when the speed does not belong to the first speed interval.

Optionally, after determining whether the state of charge is greater than a third state of charge threshold, the method further includes:

and when the state of charge is larger than the third state of charge threshold value, controlling the extended range electric vehicle to run in an electric driving mode, wherein the electric driving mode is a mode for enabling the extended range electric vehicle to run without starting an engine.

Optionally, after determining whether the state of charge is greater than a fourth state of charge threshold, the method further includes:

when the state of charge is greater than the fourth state of charge threshold, determining whether the extended range electric vehicle is in the electric drive mode;

when the extended range electric vehicle is not in the electric driving mode, determining whether the speed belongs to the second speed interval;

determining whether the speed belongs to the first speed section when the speed belongs to the second speed section;

determining the power of the engine to be the third power when the speed belongs to the first speed section;

when the carbon loading capacity belongs to the third carbon loading capacity interval, determining whether a third opening condition is met according to the charge state, wherein the third opening condition is that the charge state of the engine needs to be started when the loading capacity belongs to the third carbon loading capacity interval, and the requirement of the second opening condition on the charge state is lower than the second opening condition;

when the third opening condition is satisfied, the determining the power of the engine in at least two preset powers based on the speed interval includes:

determining whether the speed belongs to the second speed interval; determining the power of the engine to be the third power when the speed belongs to the second speed interval.

Optionally, the determining whether the third opening condition is met according to the state of charge includes:

determining whether the state of charge is greater than a fifth state of charge threshold, the fifth state of charge threshold being less than the third state of charge threshold;

when the state of charge is not greater than the fifth state of charge threshold, determining whether the state of charge is greater than a sixth state of charge threshold, the sixth state of charge threshold being greater than the fourth state of charge threshold and less than the fifth state of charge threshold;

determining that the third opening condition is satisfied when the state of charge is not greater than the sixth state of charge threshold.

determining the power of the engine as the second power when the speed does not belong to the second speed interval.

Optionally, after determining whether the state of charge of the battery of the extended range electric vehicle is greater than a fifth state of charge threshold, the method further includes:

and when the state of charge is larger than the fifth state of charge threshold value, controlling the extended range electric vehicle to run in an electric driving mode, wherein the electric driving mode is a mode for enabling the extended range electric vehicle to run without starting an engine.

Optionally, after determining whether the state of charge is greater than a sixth state of charge threshold, the method further includes:

when the state of charge is greater than the sixth state of charge threshold, determining whether the extended range electric vehicle is in the electric drive mode;

determining whether the speed is greater than the second speed when the extended range electric vehicle is not in the electric drive mode;

determining the power of the engine to be the third power when the speed is greater than the second speed.

Optionally, the method further includes:

determining whether the engine is on when the carbon load is not greater than the first carbon load;

determining whether the engine needs to be shut down when the engine has been turned on;

determining the power of the engine in at least two preset powers when the engine does not need to be shut down.

Optionally, the determining whether the engine needs to be shut down comprises:

determining whether the state of charge is greater than a shutdown threshold, the shutdown threshold being a preset threshold at which the state of charge of the engine needs to be shutdown;

when the state of charge is greater than the shutdown threshold, determining whether the required power of the extended range electric vehicle is less than the sum of the first power and a first power difference value, wherein the first power difference value is used for indicating a required power hysteresis loop of the engine needing to be shut down;

determining that the engine does not need to be shut down when the required power is not less than the sum of the first power and the first power difference.

Optionally, after determining whether the required power of the extended range electric vehicle is smaller than the sum of the first power and the first power difference, the method further includes:

determining that the engine needs to be shut down when the required power is less than the sum of the first power and the first power difference;

the engine is shut down.

Optionally, after determining whether the engine is started, the method further includes:

determining whether the engine needs to be turned on when the engine has been turned off;

when the engine needs to be started, determining the power of the engine in at least two preset powers.

Optionally, the determining whether the engine needs to be started comprises:

determining whether the state of charge is smaller than a starting threshold value, wherein the starting threshold value is a preset threshold value of the state of charge of which the engine needs to be started;

and when the state of charge is smaller than the starting threshold, starting the engine, and determining the power of the engine in at least two preset powers.

Optionally, the determining whether the engine needs to be started comprises:

determining whether the required power is greater than the third power;

when the required power is larger than the third power, determining whether the opening degree of an accelerator pedal of the extended range electric vehicle is larger than a first opening degree threshold value;

and when the opening degree is larger than the first opening degree threshold value, starting the engine, and determining the power of the engine in at least two preset powers.

Optionally, the determining the power of the engine in at least two preset powers includes:

when the state of charge is greater than the sum of the opening threshold and a first state of charge difference value and is smaller than the difference between the closing threshold and a second state of charge difference value, adjusting the power from the first power to the second power, wherein the first state of charge difference value is used for indicating that the engine works in a first state of charge hysteresis loop of the second power, and the second state of charge difference value is used for indicating that the engine works in a second state of charge hysteresis loop of the second power; or

And when the required power is greater than the sum of the first power and the first power difference and the opening is greater than a second opening threshold, adjusting the power from the first power to the second power, wherein the second opening threshold is smaller than the first opening threshold.

Optionally, after the adjusting the power from the first power to the second power, the method further includes:

when the state of charge is less than the sum of the turn-on threshold and a third state of charge difference, and the speed is greater than the second speed, adjusting the power from the second power to a third power, wherein the third state of charge difference is used for indicating that the engine works in a hysteresis loop of the third power; or the like, or, alternatively,

and when the required power is greater than the sum of the second power and a second power difference value and the opening degree is greater than the first opening degree threshold value, adjusting the power from the second power to the third power, wherein the second power difference value is used for indicating a required power hysteresis loop of the engine working at the second power.

Optionally, after the adjusting the power from the second power to the third power, the method further includes:

when the required power is smaller than the first power, the power is adjusted from the third power to the first power.

when the required power is smaller than the first power, the power is adjusted from the second power to the first power.

when the required power is smaller than the second power, the power is adjusted from the third power to the second power.

when the state of charge is smaller than the sum of the difference values of the starting threshold and a third state of charge, and the speed is greater than a third speed, adjusting the power from the first power to the third power, wherein the third speed is smaller than the second speed; or the like, or, alternatively,

and when the required power is greater than the sum of the second power and a second power difference value and the opening degree is greater than the first opening degree threshold value, adjusting the power from the first power to the third power, wherein the second power difference value is used for indicating a required power hysteresis loop of the engine working at the second power.

Optionally, the at least two carbon loading intervals include a fourth carbon loading interval, where the fourth carbon loading interval is an interval where the carbon loading is greater than the first carbon loading and less than the fourth carbon loading;

determining whether the engine needs to be shut down when the carbon loading belongs to the fourth carbon loading interval, the temperature of the GPF is greater than the first temperature and the engine is started;

when the engine needs to be closed, the oil of the engine is cut off, a throttle valve of the engine is kept at a first opening degree, and a generator of the extended range electric vehicle drags the engine to be kept at a first rotating speed;

when the temperature is less than the first temperature, stopping motoring activity of the generator until the engine is stopped.

Optionally, when the temperature of the GPF is greater than a second temperature and the engine is already on, determining whether the engine needs to be shut down, the second temperature being less than the first temperature;

determining the power of the engine as the first power when it is determined that the engine needs to be shut down;

stopping the engine when the temperature is less than the second temperature.

On the other hand, the embodiment of the present application provides a control device of an extended range electric vehicle, including:

an acquisition module that acquires a carbon capacity of a GPF of the extended range electric vehicle; when the carbon loading is higher than the first carbon loading, acquiring the speed of the extended range electric vehicle and the state of charge of a storage battery of the extended range electric vehicle;

a processing module for determining whether an engine of the extended range electric vehicle needs to be started based on the carbon loading and the state of charge; when it is determined that it is necessary to start the engine, the power of the engine is determined based on the speed among at least two preset powers, which are calculated power values based on the temperature of the GPF and the fuel economy of the engine.

In another aspect, an embodiment of the present application provides a control device for an extended range electric vehicle, where the device includes a processor and a memory, where the memory stores at least one instruction or program, and the instruction or program is loaded and executed by the processor to implement the control method for the extended range electric vehicle as described in any one of the above.

In another aspect, an embodiment of the present application provides a computer-readable storage medium, where at least one instruction or program is stored in the storage medium, and the instruction or program is loaded and executed by a processor to implement the method for controlling an extended-range electric vehicle as described in any one of the above.

In another aspect, an extended range electric vehicle includes a range extender and the control device described above.

The technical scheme at least comprises the following advantages:

the method comprises the steps of obtaining the speed and the charge state of the electric vehicle when the carbon load of the GPF of the extended range electric vehicle is higher than a first carbon load, determining whether an engine of the extended range electric vehicle needs to be started or not based on the carbon load and the charge state, determining the power of the engine based on the speed in at least two preset powers when the engine needs to be started, and regenerating the GPF by starting the engine under the condition that the carbon load is higher and the starting condition is met due to the fact that the carbon load is considered under the starting condition of the engine.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic illustration of a power system of an extended range electric vehicle provided in an exemplary embodiment of the present application;

FIG. 2 is a schematic illustration of an exhaust system of an extended range electric vehicle provided in an exemplary implementation of the present application;

FIG. 3 is a flow chart of a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 4 is a flow chart of a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 5 is a flow chart of a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 6 is a flow chart of a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 7 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 8 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 9 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 10 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 11 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 12 is a control logic diagram of a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 13 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

FIG. 14 is a flowchart illustrating a method of controlling an extended range electric vehicle according to an exemplary embodiment of the present application;

fig. 15 is a schematic diagram illustrating the division of the activation regions of the engine's tow-back function and the stop prohibition function according to the carbon load of the GPF and the temperature of the GPF in the control method of the extended range electric vehicle according to the exemplary embodiment of the present application;

fig. 16 is a block diagram of a control device of an extended range electric vehicle according to an exemplary embodiment of the present application;

fig. 17 is a block diagram of a control apparatus of an extended range electric vehicle according to an exemplary embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or electrical connection; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, which shows a schematic diagram of a power system of an extended range electric vehicle according to an exemplary embodiment of the present application, as shown in fig. 1, the power system 100 includes:

the range extender 110 includes an engine 111 and a generator 112, wherein the engine 111 is used for driving the generator 112 to generate electric energy.

A control device 120 for receiving the electric energy generated by the generator 112, controlling the electric energy to drive the motor 130 and/or charging a battery 140 (the battery 140 may be a High Voltage (HV) battery); or, the power supply is used for receiving the power provided by the battery 140 and controlling the power to drive the motor 130.

The motor 130 is used to drive a power device (a reduction gear, a driving wheel, etc.) of the extended range electric vehicle.

It should be noted that the dashed arrows in fig. 1 are used to indicate the flowing direction of the electric energy, and the arrows are implemented to indicate the direction of the driving force.

Exemplarily, the extended range electric vehicle provided in the embodiment of the present application includes three operation modes: (1) electric drive mode: the engine 111 is not operated, and the battery 140 supplies electric power to the motor 130; (2) hybrid drive mode: generator 112 (driven by engine 111) and battery 140 simultaneously provide electrical power to motor 130; (3) the driving power generation mode is as follows: the generator 112 (driven by the engine) provides electrical energy to the motor 130 while charging the battery 140.

Referring to fig. 2, a schematic diagram of an exhaust system of an extended range electric vehicle is shown, provided in accordance with an exemplary implementation of the present application. Wherein, this exhaust system 200 can be set up in the exhaust emission department of engine 111 of fig. 1, this exhaust system 200 includes:

a three-way catalyst (TWC) 211 for treating harmful substances, such as Hydrocarbon (HC), carbon monoxide (CO), and nitrogen monoxide (NO), in exhaust gas of the engine 111 to convert the harmful substances into harmless substances.

And the GPF212 is used for trapping particulate matters in the exhaust gas of the engine 111 and reducing the particulate matters in the exhaust gas.

A muffler (muffler)213 for reducing exhaust emission noise of the engine 111.

Among these, the three-way catalyst 211 and the muffler 213 are optional devices in the exhaust system 200.

In view of the safety hazard of the GPF due to its excessively high carbon load, an engine management system (EMS, which may be the control device 120 in fig. 1 or a component of the control device 120) of the extended range electric vehicle needs to adopt an appropriate control strategy to control the GPF, in the embodiment of the present application, the control of the GPF mainly involves carbon model calculation, regeneration control, and active safety control, where:

1、carbon model: the simulation model is a simulation model for estimating and calculating the carbon loading of GPF, and the accuracy of the simulation model is the basis for better realizing regeneration control and active safety control;

2、regeneration control: the strategy is a strategy for heating the temperature of the GPF to a regeneration temperature (which may be above 580 degrees celsius (c)), and increasing oxygen in exhaust gas through air-fuel ratio control to rapidly oxidize particulate matter for the purpose of removing particulate matter, in order to remove particulate matter from the GPF and recover the filtering function of the GPF, and includes active regeneration (which in turn includes active regeneration under driving conditions and active regeneration under parking conditions) and passive regeneration:

(1)active regeneration under driving condition: when the engine runs at a more proper working condition, if the carbon load of the GPF is higher, the EMS delays the ignition angle to enable the temperature of the GPF to rise to reach the regeneration temperature, and the lean air-fuel is matchedThe exhaust gas is in an oxygen-rich state, so that the particulate matters accumulated inside the GPF are combusted to realize regeneration;

(2)parking condition active regeneration: when a vehicle instrument prompts a user to need GPF regeneration, the user drives the vehicle into a vehicle sales service shop, service personnel trigger GPF regeneration through a diagnostic instrument, the regeneration is completed under the idling condition of an engine, and the ignition angle is delayed more to reach the regeneration temperature of the GPF because the exhaust temperature of the engine is lower under the idling condition;

(3)passive regeneration: the engine oil-out control method is applied to the oil-out working condition of the engine, and does not need EMS to carry out special control;

3、active safety control: the strategy is a strategy for prohibiting the engine from being cut off and stopped under the condition that the temperature of the GPF is high for the purpose of protecting the GPF.

Referring to fig. 3, a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application is shown, where the method is applicable to the power system 100 shown in fig. 1, and the method may be executed by the control device 120 in fig. 1, where the method includes:

step 301, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

For example, the carbon loading of the GPF (hereinafter referred to as M) may be calculated by a carbon model based on the obtained parameters related thereto (e.g., which may be the engine speed and/or its load, the voltage difference across the GPF or the oil consumption of the extended range electric vehicle).

Step 302, when the carbon loading is higher than the first carbon loading, acquiring a speed of the extended range electric vehicle and a state of charge of a storage battery of the extended range electric vehicle.

For example, the speed of the extended range electric vehicle can be calculated by data collected by a speed sensor; the state of charge (hereinafter referred to as SOC) may be calculated by a state of charge model based on the obtained parameters related thereto (e.g., current of the battery, voltage of the battery, etc.).

Step 303, determining whether an engine of the extended range electric vehicle needs to be started based on the carbon loading and the state of charge.

The first carbon load (hereinafter, referred to as M1) may be a trigger value for determining whether to turn on or off the engine and determine the power of the engine, and when M > M1, the first carbon load is in a higher carbon load interval, and the first carbon load may be determined whether to turn on the engine by comprehensively considering the carbon load and the state of charge, so that the carbon load is taken into consideration on the basis of considering the power requirement of the extended range electric vehicle, thereby more accurately determining the turn-on timing of the engine, starting the engine in the case of needing to turn on the engine, and actively regenerating the GPF, thereby improving the safety performance of the extended range electric vehicle.

When it is determined that it is necessary to start the engine, the power of the engine is determined based on the speed among at least two preset powers, which are power values calculated based on the temperature of the GPF and the fuel economy of the engine, step 304.

When the engine needs to be started, the appropriate power can be determined based on the speed (hereinafter referred to as V) of the extended range electric vehicle, the speed can accurately reflect the requirement of the extended range electric vehicle on the power of the engine, and meanwhile, the preset power is a power value calculated based on the temperature (hereinafter referred to as T) of the GPF and the fuel economy of the engine, so that the power of the engine determined based on the preset power can meet the power requirement of the extended range electric vehicle and simultaneously has safety and fuel economy.

To sum up, in the embodiment of the application, when the carbon load of the GPF of the extended range electric vehicle is higher than the first carbon load, the speed and the charge state of the electric vehicle are acquired, whether the engine of the extended range electric vehicle needs to be started is determined based on the carbon load and the charge state, when the engine needs to be started is determined, the power of the engine is determined based on the speed in at least two preset powers, and since the consideration of the carbon load is introduced into the starting condition of the engine, the GPF can be regenerated by starting the engine under the conditions that the carbon load is higher and the starting condition is met, and the safety performance of the extended range electric vehicle is improved.

Referring to fig. 4, a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application is shown, the method may be applied to the power system 100 shown in fig. 1, the method may be executed by the control device 120 in fig. 1, and the method may be an alternative implementation of the embodiment in fig. 3, and the method includes:

step 401, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

The method for obtaining the carbon loading may refer to step 301 in the embodiment of fig. 3, which is not described herein again.

Step 402, when the carbon loading is higher than the first carbon loading, acquiring the speed of the extended range electric vehicle and the state of charge of a storage battery of the extended range electric vehicle.

The method for obtaining the speed and the state of charge can refer to step 302 in the embodiment of fig. 3, which is not described herein again.

At step 403, it is determined whether the engine needs to be turned on based on the carbon load interval and the state of charge interval.

The carbon loading interval is an interval to which the carbon loading belongs in at least two carbon loading intervals, and the state of charge interval is an interval to which the state of charge belongs in at least two state of charge intervals.

For example, the carbon load interval includes a carbon load interval (Mx, ∞) greater than a carbon load x (hereinafter, may be referred to as Mx) and a carbon load interval [0, Mx ] not greater than Mx, the state of charge interval includes a state of charge interval (SOCx, ∞) greater than a state of charge x (hereinafter, may be referred to as SOCx) and a state of charge interval [0, SOCx ] not greater than SOCx, combinations of different carbon load intervals and different state of charge intervals correspond to start instructions for the engine, and combinations of (Mx, ∞) and (SOCx, ∞) correspond to a lack of need to start the engine; the combination of [0, Mx ] and (SOCx, ∞) corresponds to no need to start the engine; the combination of (Mx, ∞) and [0, SOCx ] corresponds to the need to turn on the engine; the combination of [0, Mx ] and [0, SOCx ] corresponds to no need to turn on the engine, and if M ∈ (M1, infinity), SOC ∈ [0, SOC1], it is determined that the engine needs to be turned on.

The method comprises the steps of determining the interval to which the carbon loading of the GPF belongs in at least two carbon loading intervals, determining the interval to which the state of charge of the storage battery belongs in at least two state of charge intervals, and determining whether to start the engine or not based on the interval to which the carbon loading belongs and the interval to which the state of charge belongs, so that the detection speed can be increased on the basis of accurately determining the starting requirement of the engine according to the carbon loading and the state of charge.

And step 404, when the engine needs to be started, determining the power of the engine in at least two preset powers based on the speed interval.

The speed interval is an interval in which the speed of the extended range electric vehicle belongs to at least two speed intervals. The different speed intervals correspond to different powers, and the current requirements of the extended range electric vehicle, the temperature of the GPF and the fuel economy are considered according to the corresponding relation of each speed and each power.

For example, the speed of the extended range electric vehicle is V, and the speed section includes a speed section (Vx, ∞) greater than a speed x (hereinafter referred to as Vx available) and a speed section [0, Vx ] not greater than Vx, where in a state where it is determined that it is necessary to turn on the engine, (Vx, ∞) corresponds to a power x1 (hereinafter referred to as Px 1), [0, Vx ] corresponds to a power x2 (hereinafter referred to as Px 2), Px1 ≠ Px2, and if V ∈ (Vx, ∞), it is determined that the power of the engine is Px1, and the engine is turned on and operated at a power of Px 1.

The following fig. -to-fig. embodiments are exemplified with at least two carbon load intervals including a first carbon load interval, a second carbon load interval, and a third carbon load interval, at least two speed intervals including a first speed interval and a second speed interval, and at least two preset powers including a first power (hereinafter may be referred to as P1), a second power (hereinafter may be referred to as P2), and a third power (hereinafter may be referred to as P3), wherein:

the first carbon loading interval is an interval (M1, M2) in which a carbon loading greater than M1 and less than a second carbon loading (hereinafter may be referred to as M2) is located; the second carbon loading interval is an interval [ M2, M3 ] in which the carbon loading is greater than M2 and less than a third carbon loading (hereinafter may be referred to as M3); the third carbon loading interval is the interval [ M3, ∞ ] in which the carbon loading is greater than M3, M1 < M2 < M3.

The first speed range is a range (V1, ∞) in which a speed greater than the first speed (hereinafter referred to as V1) is located; the second speed interval is an interval (V2, ∞) in which a speed greater than the second speed (hereinafter referred to as V2) is located, and V1 > V2.

P1 < P2 < P3, the temperature of GPF is greater than when the engine is operating at P1 (i.e., T2 > T1, T2 is the temperature of the engine when operating at P2, T1 is the temperature of the engine when operating at P1) when the engine is operating at P2; when the engine is operating at P3, the temperature of the GPF is greater than when the engine is operating at P2 (i.e., T3 > T2, with T3 being the temperature of the engine when operating at P3).

Referring to fig. 5, a flowchart illustrating a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method being applicable to the power system 100 shown in fig. 1, the method being executed by the control device 120 in fig. 1, and the method being an alternative implementation of the embodiment in fig. 4, and the method including:

step 501, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

Step 502, when the carbon loading is higher than the first carbon loading, acquiring a speed of the extended range electric vehicle and a state of charge of a storage battery of the extended range electric vehicle.

And 503, when the carbon loading amount belongs to the first carbon loading amount interval, determining whether a first starting condition is met according to the charge state.

When determining M e (M1, M2), determining whether a first opening condition is satisfied according to the state of charge, and when the first opening condition is not satisfied, executing step 504 a; when the first on condition is satisfied, step 504b is performed.

The first start condition is a requirement on the state of charge of the engine that needs to be started when the loading belongs to the first carbon loading interval. When M e (M1, M2), the particulate matter content of GPF is at a higher level, and therefore it is necessary to determine whether the first opening condition is satisfied depending on its state of charge.

Optionally, in step 503, it is determined whether the first turn-on condition is satisfied according to the state of charge, including but not limited to: determining whether the state of charge is greater than a first state of charge threshold (hereinafter referred to as SOC 1); determining whether the state of charge is greater than a second state of charge threshold (hereinafter may be referred to as SOC2, SOC1 > SOC2) when the state of charge is not greater than the first state of charge threshold (SOC no greater than SOC 1); when the state of charge is not greater than the second state of charge threshold (SOC no greater than SOC2), it is determined that the first turn-on condition is satisfied.

Optionally, in the method for determining whether the first turn-on condition is satisfied according to the state of charge, when the state of charge is greater than the first state of charge threshold (SOC > SOC1), step 504a is executed.

Optionally, in the method for determining whether the first starting condition is met according to the state of charge, when the state of charge is greater than a second state of charge threshold (SOC > SOC2), determining whether the extended range electric vehicle is in the electric driving mode; when the extended range electric vehicle is in the electric driving mode, the extended range electric vehicle is kept in the electric driving mode.

Optionally, in the method for determining whether the first turn-on condition is satisfied according to the state of charge, when the extended range electric vehicle is not in the electric drive mode, step 504b is executed.

When M e (M1, M2), the particulate matter content in GPF is at a higher level, but since M is not at a level greater than M2, the regeneration requirement for GPF is at a lower priority and a higher turn-on condition needs to be set to determine whether the engine needs to be turned on.

Step 504a, controlling the extended range electric vehicle to run in the electric driving mode.

Step 504b, it is determined whether the speed belongs to the first speed interval.

When V ∈ (V1, ∞), go to step 505 a; when in use

Then, step 505b is entered.

When M e (M1, M2), the particulate matter content in GPF is at a higher level, but since M is not greater than M2, a more accurate engine operating point can be determined based on regeneration requirements, fuel economy and power requirements at a higher speed V1 as the decision speed in the step of determining engine power.

And 505a, determining the power of the engine to be the second power.

When V ∈ (V1, ∞), the required power of the extended range electric vehicle is larger, and therefore the power of the engine is determined to be higher power P2.

And 505b, determining the power of the engine to be the first power.

When in use

At this time, the required power of the extended range electric vehicle is smaller, and therefore the power of the engine is determined to be the lower power P1.

Referring to fig. 6, which shows a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method may be applied to the power system 100 shown in fig. 1, the method may be executed by the control device 120 in fig. 1, and the method may be an alternative implementation of step 503 to step 505b in fig. 5, and the method includes:

in step 601, determining whether the SOC is greater than the SOC1, if the SOC is greater than the SOC1, executing step 602a, enabling the extended range electric vehicle to run in an electric driving mode, and if the SOC is no greater than the SOC1, executing step 602 b; in step 602b, it is determined whether the SOC is greater than SOC2, if the SOC > SOC2, step 603 is executed, and if the SOC no higher than SOC2, step 604 is executed; in step 603, determining whether the extended range electric vehicle is in the electric driving mode, executing step 602a when the extended range electric vehicle is in the electric driving mode, and executing step 604 when the extended range electric vehicle is not in the electric driving mode; in step 604, determining whether V is greater than V1, if V > V1, making the extended range electric vehicle in hybrid driving mode with power of P2, if V no more than V1, making the extended range electric vehicle in hybrid driving mode with power of P1; after step 604, step 605 is executed to determine whether the SOC is greater than the SOC1, if the SOC > SOC1, step 602a is executed, if the SOC no higher than SOC1, step 604 is executed.

Referring to fig. 7, a flowchart illustrating a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method being applicable to the power system 100 shown in fig. 1, the method being executed by the control device 120 in fig. 1, and the method being an alternative implementation of the embodiment in fig. 4, and the method including:

step 701, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

Step 702, when the carbon loading is higher than the first carbon loading, acquiring a speed of the extended range electric vehicle and a state of charge of a battery of the extended range electric vehicle.

And 703, determining whether a second starting condition is met according to the charge state when the carbon loading amount belongs to a second carbon loading amount interval.

When determining M ∈ [ M2, M3)), determining whether a second turn-on condition is satisfied according to the state of charge, and when the second turn-on condition is not satisfied, performing step 704 a; when the second on condition is satisfied, step 704b is performed.

The second starting condition is a requirement for the state of charge of the engine to be started when the loading capacity belongs to a second carbon loading capacity interval, and the requirement for the state of charge of the second starting condition is lower than that of the first starting condition.

When M e [ M2, M3), the particulate matter in GPF is at a higher level than in the first carbon loading interval, and therefore it is necessary to determine whether the second turn-on condition, which is lower than the first turn-on condition, is satisfied depending on its state of charge.

Optionally, in step 703, it is determined whether the second turn-on condition is satisfied according to the state of charge, including but not limited to: determining whether the state of charge is greater than a third state of charge threshold (hereinafter referred to as SOC3, SOC3 > SOC 2); when the state of charge is not greater than the third state of charge threshold (SOC no greater than SOC3), determining whether the state of charge is greater than a fourth state of charge threshold (hereinafter may be referred to as SOC4, SOC3 > SOC 4); when the state of charge is not greater than the fourth state of charge threshold (SOC no greater than SOC4), it is determined that the second turn-on condition is satisfied.

Alternatively, in the method for determining whether the second turn-on condition is satisfied according to the state of charge, when the state of charge is not greater than the third state of charge threshold (SOC > SOC3), step 704a is executed.

Optionally, in the method for determining whether the second starting condition is met according to the state of charge, when the state of charge is greater than a fourth state of charge threshold (SOC > SOC4), determining whether the extended range electric vehicle is in the electric driving mode; when the extended range electric vehicle is in the electric driving mode, the extended range electric vehicle keeps the electric driving mode.

Alternatively, in the method for determining whether the second turn-on condition is satisfied according to the state of charge, when the extended range electric vehicle is not in the electric drive mode, step 704a is executed.

When M e M2, M3), the particulate matter content of the GPF is at a higher level than in the embodiment of fig. 5 and 6, and therefore a second lower opening condition than the first opening condition needs to be set to determine whether the engine needs to be turned on.

Step 704a, controlling the extended range electric vehicle to run in the electric driving mode.

Step 704b, it is determined whether the speed belongs to the second speed interval.

When M e M2, M3), the particulate matter content of the GPF is at a higher level than in the embodiment of fig. 5 and the embodiment of fig. 6, and therefore the priority of the regeneration request is higher than in the embodiment of fig. 5 and the embodiment of fig. 6, a more accurate engine operating point can be determined based on the regeneration request, the fuel economy and the power request, with a lower speed V2 as the decision speed in the step of determining the power of the engine.

When in use

Then step 705a is executed; when V ∈ (V2, ∞), step 705b is performed.

Step 705a, determining the power of the engine as a first power.

When in use

Step 705b, it is determined whether the speed belongs to the first speed interval.

When V e (V1, ∞), execute step 706 a; when in use

Then step 706b is performed.

When V e (V2, ∞), it is necessary to further determine whether it is greater than a greater speed value V1, so that the power of the engine can be determined more accurately.

In step 706a, the power of the engine is determined to be the third power.

When V ∈ (V1, ∞), the required power of the extended range electric vehicle is larger than in step 705a, and therefore the power of the engine is determined to be the higher power P2.

In step 706b, the power of the engine is determined to be the second power.

When in use

Meanwhile, since V ∈ (V2, ∞), the required power of the extended range electric vehicle is smaller than step 706a, and therefore the power of the engine is determined to be power P2 that is less than P3 and greater than P1.

Referring to fig. 8, which shows a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method may be applied to the power system 100 shown in fig. 1, the method may be executed by the control device 120 in fig. 1, and the method may be an alternative implementation of step 703 to step 706b in the embodiment in fig. 7, and the method includes:

in step 801, determining whether the SOC is greater than the SOC3, if the SOC is greater than the SOC3, executing step 802a, enabling the extended range electric vehicle to run in an electric driving mode, and if the SOC is no greater than the SOC3, executing step 802 b; in step 802b, it is determined whether the SOC is greater than SOC4, if SOC > SOC4, go to step 803, if SOC no higher than SOC4, go to step 804; in step 803, it is determined whether the extended range electric vehicle is in the electric driving mode, when the extended range electric vehicle is in the electric driving mode, step 802a is executed, when the extended range electric vehicle is not in the electric driving mode, step 804 is executed; in step 804, determining whether V is greater than V2, if V is not greater than V2, making the extended-range electric vehicle in a hybrid driving mode, where the power of the engine is P1, when V is greater than V2, determining whether V is greater than V1, if V is not greater than V1, making the extended-range electric vehicle in the hybrid driving mode, where the power of the engine is P2, if V > V1, making the extended-range electric vehicle in the hybrid driving mode, where the power of the engine is P3; after step 804, step 805 is executed to determine whether the SOC is greater than the SOC3, if the SOC > SOC3, step 802a is executed, if the SOC no higher than SOC3, step 804 is executed.

Referring to fig. 9, which shows a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method may be applied to the power system 100 shown in fig. 1, the method may be executed by the control device 120 in fig. 1, and the method may be an alternative implementation of the embodiment in fig. 4, and the method includes:

step 901, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

Step 902, acquiring a speed of the extended range electric vehicle and a state of charge of a battery of the extended range electric vehicle when the carbon loading is higher than the first carbon loading.

And 903, when the carbon loading amount belongs to a third carbon loading amount interval, determining whether a third opening condition is met according to the charge state.

When determining that M belongs to [ M3, ∞), determining whether a third opening condition is satisfied according to the state of charge, and when the third opening condition is not satisfied, executing step 904 a; when the third opening condition is satisfied, step 904b is performed.

The third starting condition is that the charge state requirement of the engine needs to be started when the loading capacity belongs to a third carbon loading capacity interval, and the charge state requirement of the second starting condition is lower than that of the second starting condition.

When M e M3 ∞) the particulate matter in GPF is in a higher position than in the embodiment of fig. 5-8, and therefore it is necessary to determine whether a third on condition, lower than the second on condition, is met depending on its state of charge.

Optionally, in step 903, it is determined whether the second turn-on condition is satisfied according to the state of charge, including but not limited to: determining whether the state of charge is greater than a fifth state of charge threshold (hereinafter referred to as SOC5, SOC5 < SOC 3); when the state of charge is not greater than the fifth state of charge threshold (SOC no more than SOC5), determining whether the state of charge is greater than a sixth state of charge threshold (hereinafter may be referred to as SOC6, SOC4 < SOC6 < SOC 5); when the state of charge is not greater than a sixth state of charge threshold (SOC no more than SOC6), it is determined that the third opening condition is satisfied.

Optionally, in the method for determining whether the third enabling condition is met according to the state of charge, when the state of charge is greater than a fifth state of charge threshold (SOC > SOC5), step 904a is executed.

Optionally, in the method for determining whether the third opening condition is met according to the state of charge, when the state of charge is greater than a sixth state of charge threshold (SOC > SOC6), determining whether the extended range electric vehicle is in the electric drive mode; when the extended range electric vehicle is in the electric driving mode, the extended range electric vehicle keeps the electric driving mode.

Optionally, in the method for determining whether the third starting condition is met according to the state of charge, when the extended range electric vehicle is not in the electric driving mode, step 904b is executed.

Step 904a, controlling the extended range electric vehicle to run in the electric driving mode.

Step 904b, it is determined whether the speed belongs to the second speed interval.

When M e M3 ∞) the particulate matter content in GPF is at a higher priority than in the embodiment of fig. 7 and 8, and therefore the regeneration demand is higher than in the embodiment of fig. 7 and 8, and a more accurate engine operating point can be determined based on the regeneration demand, fuel economy and power demand, with a lower speed V2 as the decision speed in the step of determining the power of the engine.

When V ∈ (V2, ∞), step 905a is performed; when in use

Then step 905b is performed.

Step 905a, determining the power of the engine to be a third power.

When V ∈ (V2, ∞), the required power of the extended range electric vehicle is larger, and therefore the power of the engine is determined to be higher power P3.

Step 905b, determine the power of the engine as the second power.

When in use

At this time, the required power of the extended range electric vehicle is small, and therefore the power of the engine is determined to be the higher power P2.

Referring to fig. 10, which shows a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method may be applied to the power system 100 shown in fig. 1, the method may be executed by the control device 120 in fig. 1, and the method may be an alternative implementation of steps 903 to 905b in fig. 9, and the method includes:

in step 1001, determining whether the SOC is greater than the SOC5, if the SOC is greater than the SOC5, executing step 1002a, enabling the extended range electric vehicle to run in an electric driving mode, and if the SOC is no greater than the SOC5, executing step 1002 b; in step 1002b, determining whether the SOC is greater than SOC6, if SOC > SOC6, executing step 1003, and if SOC no more than SOC6, executing step 1004; in step 1003, determining whether the extended range electric vehicle is in an electric driving mode, executing step 1002a when the extended range electric vehicle is in the electric driving mode, and executing step 1004 when the extended range electric vehicle is not in the electric driving mode; in step 1004, determining whether V is greater than V2, if V > V2, making the extended range electric vehicle in hybrid driving mode with power of the engine P3, and if V no more than V2, making the extended range electric vehicle in hybrid driving mode with power of the engine P2; after step 1004, step 1005 is executed to determine whether the SOC is greater than SOC6, if SOC > SOC6, step 1002a is executed, if SOC no higher than SOC6, step 1004 is executed.

In the examples of FIG. 3 through FIG. 10, when the carbon loading of GPF is higher, M>M1, determining appropriate power (i.e., engine operating point) among preset powers based on carbon loading, state of charge, and speed, wherein each preset power is primarily considered to be GPF temperature (e.g., center temperature thereof) while maximizing engine fuel economy, and the control strategy may be referred to asThermostat control strategy. The determination of the power after engine start-up, based on speed and carbon load, can be seen in table one:

watch 1

In the embodiments of fig. 3 to 10, when M no more than M1, the method in any of the embodiments of fig. 11 and 12 can be performed.

Referring to fig. 11, a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, which may be applied to the power system 100 shown in fig. 1, may be executed by the control device 120 in fig. 1, and includes:

step 1101, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

At step 1102, it is determined whether the engine is on when the carbon load is not greater than the first carbon load.

When M is no more than M1, the operating state of the engine needs to be determined first, and whether to open/close the engine is determined based on the operating state of the engine and the corresponding opening/closing conditions, in the embodiment of the present application, the carbon loading amount is at a lower position (M no more than M1), so that the opening/closing spring of the engine does not need to consider the carbon loading amount, and whether to open/close the engine can be determined more accurately.

When it is determined that the engine is turned on, performing step 1103 b; when it is determined that the engine is not on, step 1103a is executed.

In step 1103a, it is determined whether the engine needs to be turned on.

When it is determined that the engine does not need to be started, step 1101 is executed; when it is determined that the engine needs to be turned on, step 1104a is performed. For example, in the present embodiment, the trigger condition for satisfying the requirement of the engine to be turned on may be named condition 1.

Alternatively, whether or not turn-on is required may be determined by any of the following methods:

(1) determining whether the state of charge is less than a turn-on threshold; when the state of charge is less than the turn-on threshold, it is determined that the engine needs to be turned on and step 1104a is performed. The starting threshold is a preset threshold of the state of charge of the engine needing to be started, and can accurately reflect the actual power requirement of the extended range electric vehicle.

In the embodiment, the carbon loading is at a lower position (M no more than M1), so the regeneration requirement of the GPF is lower, and the engine start condition is based on whether the state of charge is greater than the start threshold, so that the start timing of the engine can be determined more accurately.

(2) Determining whether the required power is greater than a third power; when the required power is greater than the third power (P > P3), determining whether an opening degree (hereinafter, referred to as a) of an accelerator pedal of the extended range electric vehicle is greater than a first opening degree threshold (hereinafter, referred to as a 1); when the opening degree is greater than the first opening degree threshold (a > a1), it is determined that the engine needs to be turned on, and step 1104a is performed. That is, in the method (2), it is necessary to satisfy both P > P3 and a > a1 to start the engine.

In the embodiment, the required power reflects the average power demand of the extended range electric vehicle, and the opening degree of the accelerator reflects the subjective power demand of the driver, and in the embodiment, the carbon loading is at a lower position (M no more than M1), so the regeneration demand of the GPF is lower, the starting condition of the engine is higher, P > P3 and a > a1 need to be simultaneously met, and the starting time of the engine can be more accurately determined.

Step 1103b, determine if the engine needs to be shut down.

When it is determined that the engine needs to be shut down, performing step 1104 b; when it is determined that the engine does not need to be shut down, step 1104a is performed. For example, in the present embodiment, the trigger condition for meeting the engine shutdown requirement may be named condition 2.

Optionally, in step 1103b, "determine if the engine needs to be shut down" includes, but is not limited to: determining if the state of charge is greater than a shutdown threshold (below available SOC)_{Closing device}Refers to); when the state of charge is greater than a turn-off threshold, determining whether a required power (hereinafter referred to as available P) of the extended range electric vehicle is less than a sum of a first power and a first power difference (hereinafter referred to as available P Δ 1); when the required power is not less than the sum of the first power and the first power difference (P notless than P1+ P Δ 1), determining that the engine does not need to be shut down, performing step 1104 a; when the required power is less than the sum of the first power and the first power difference (P < P1+ P Δ 1), it is determined that the engine needs to be shut down and step 1104b is performed.

The closing threshold is a preset threshold of the state of charge of the engine needing to be closed, and the first power difference value is used for indicating a required power hysteresis loop of the engine needing to be closed.

In step 1104a, the power of the engine is determined among at least two preset powers.

Optionally, when the engine of the extended range electric vehicle is not started, starting the engine, and determining the power of the engine as the first power; alternatively, when the engine of the extended range electric vehicle is turned on, the power of the engine may be dynamically determined among at least two preset powers according to the power, required power, state of charge, and speed of the engine by any one of the following methods, and the control strategy may be referred to asIs composed ofMulti-power following control strategy。

(1) When the state of charge is greater than the sum of the turn-on threshold and the first state of charge difference (hereinafter available SOC Δ 1), and is less than the turn-off threshold (hereinafter available SOC)_{Closing device}Referred to below) and a second state-of-charge difference (hereinafter may be referred to as SOC Δ 2)_{Opening device}+SOC△1＜SOC＜SOC_{Closing device}-SOC Δ 2) and the power of the engine is the first power, the power is adjusted from the first power to the second power.

The first state of charge difference value is used for indicating a first state of charge hysteresis of the engine working at a second power, and the second state of charge difference value is used for indicating a second state of charge hysteresis of the engine working at the second power.

(2) When the required power is greater than the sum of the first power and the first power difference, the opening is greater than a second opening threshold (hereinafter, referred to as a2, a2 < a1, P > P1+ P Δ 1, and a > a2), and the power of the engine is the first power, the power is adjusted from the first power to the second power.

In this embodiment, the trigger condition for adjusting the power from the first power to the second power may be named condition 3.

(3) When the state of charge is less than the sum of the turn-on threshold and a third state of charge difference (hereinafter referred to as SOC Δ 3), the speed is greater than the second speed (SOC < SOC)_{Opening device}+ SOC Δ 3 and V > V2) and the power of the engine is the second power, the power is adjusted from the second power to the third power.

Wherein the third state of charge difference is indicative of a hysteresis loop of the engine operating at a third power.

(4) When the required power is greater than the sum (P > P2+ P Δ 2) of the second power and a difference (hereinafter, referred to as P Δ 2) between the second power and the second power, the opening is greater than a first opening threshold (a > a1), and the power of the engine is the second power, the power is adjusted from the second power to a third power.

In this embodiment, the trigger condition for adjusting the power from the second power to the third power may be named condition 4.

(5) When the required power is less than the first power (P < P1) and the power of the engine is the third power, the power is adjusted from the third power to the first power.

And the second power difference value is used for indicating the required power hysteresis loop of the engine working at the second power.

In this embodiment, the trigger condition for adjusting the power from the third power to the first power may be named condition 5.

(6) When the required power is less than the first power (P < P1) and the power of the engine is the second power, the power is adjusted from the second power to the first power.

In this embodiment, the trigger condition for adjusting the power from the second power to the first power may be named condition 6.

(7) When the required power is less than the second power (P < P2) and the power of the engine is the third power, the power is adjusted from the third power to the second power.

In this embodiment, the trigger condition for adjusting the power from the third power to the second power may be named condition 7.

(8) When the state of charge is less than the sum of the opening threshold and the third state of charge difference (SOC < SOC)_{Opening device}+ SOC Δ 3), the speed is greater than a third speed (hereinafter may be referred to as V3, V3 < V2, V > V1), and the power of the engine is the first power, the power is adjusted from the first power to the third power.

(9) When the required power is larger than the sum of the second power and the difference value of the second power (P > P2+ P delta 2), the opening is larger than the first opening threshold value (a > a1), and the power of the engine is the first power, the power is adjusted from the first power to the third power.

In this embodiment, the trigger condition for adjusting the power from the first power to the third power may be named condition 8.

In step 1104b, the engine is turned off.

When it is determined that the engine needs to be shut down, the engine of the extended range electric vehicle is shut down.

Referring to FIG. 12, which shows the control logic of the embodiment of FIG. 11, the engine is turned on when condition 1 is met, the power of the engine is switched between P1, P2, and P3 based on different trigger conditions, and the engine is turned off when condition 2 is met.

In any of the embodiments of fig. 3-12, when M > M1, active regeneration of GPF may be achieved by a thermostat control strategy; when M is not more than M1, the most suitable operating point of the engine can be determined by a multi-power follow-up control strategy, the above embodiment introduces the carbon loading state of the GPF into the judgment of the operating point of the engine, and when the carbon loading is high, the engine is started as early as possible and operates at the operating point with high exhaust temperature.

In the following embodiment, the embodiment of FIG. 13 introduces the temperature of the GPF, and the engine (i.e., of the engine) may be towed by the generator when the GPF temperature is high and the extended range electric vehicle is switched from the hybrid drive mode to the electric drive modeBack mop Function(s)) To achieve passive regeneration of GPF; the embodiment of FIG. 14 introduces GPF temperatures that prohibit direct engine shutdown (i.e., of the engine) when both GPF temperature and carbon loading are highInhibit shutdown function) When the temperature of the GPF is reduced to a proper temperature, the engine is allowed to be directly stopped, so that the GPF is prevented from being damaged due to violent combustion of particulate matters in the stopping process, and active safety control of the GPF is realized.

Referring to fig. 13, a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method being applicable to the power system 100 shown in fig. 1, and the method being executed by the control device 120 in fig. 1, includes:

step 1301, acquiring the carbon capacity of the GPF of the extended range electric vehicle.

At step 1302, it is determined whether the engine needs to be shut down when the carbon load is in a fourth carbon load interval, the temperature of the GPF is greater than the first temperature, and the engine is on.

Wherein the fourth carbon loading interval is an interval (M1, Msf) in which the carbon loading is greater than the first carbon loading and less than the fourth carbon loading (hereinafter may be referred to as Msf).

The method for determining whether the engine needs to be shut down may refer to any of the above embodiments, and will not be described herein.

And step 1303, when the engine needs to be closed, the engine is cut off, the throttle valve of the engine is kept at the first opening degree, and the generator of the extended range electric vehicle drags the engine to keep at the first rotating speed.

When the temperature is less than the first temperature, the generator motoring is stopped until the engine is shut down, step 1304.

Wherein the first temperature (hereinafter referred to as Tgpf 1) is a temperature value indicative of triggering a tow-back function of the engine.

When the extended range electric vehicle is in the hybrid drive mode (i.e., the engine is on), and M e (M1, Msf), T > Tgpf1, the engine's tow-back function is activated, if engine shut-off is requested at this time:

(1) the engine is cut off and the throttle valve is kept at the first opening (under the first opening, the engine is cut off, so that GPF cannot exceed tolerance limit due to violent combustion of carbon deposition); (2) the engine is pulled by the generator to maintain the first speed, at which time a large amount of fresh air enters the GPF and combusts the particulate matter accumulated in the GPF.

When T is less than Tgpf1, the temperature condition of particulate matter combustion is not met, the engine dragging function is closed, and the engine needs to be controlled to be normally stopped.

Optionally, considering the influence of noise, vibration and harshness (NVH), the first rotation speed when the engine is activated may be set to three different rotation speeds according to the vehicle running speed, and the throttle opening gradually increases with the decrease of the rotation speed, in order to ensure sufficient air flow through the GPF, and table two provides a referable set value:

watch two

Speed (kilometer/hour)	V3	V2	V1
				First speed (RPM)	1500	2000	2500
Throttle opening (%)	15	10	5

Referring to fig. 14, a flowchart of a control method of an extended range electric vehicle according to an exemplary embodiment of the present application, the method being applicable to the power system 100 shown in fig. 1, and the method being executed by the control device 120 in fig. 1, includes:

step 1401, obtaining the carbon capacity of the GPF of the extended range electric vehicle.

In step 1402, it is determined whether the engine needs to be shut down when the temperature of the GPF is greater than the first temperature and the engine is on.

In step 1403, when it is determined that the engine needs to be shut down, the power of the engine is determined to be a first power.

When the temperature is less than the second temperature, the engine is shut down, step 1404.

Wherein the second temperature (hereinafter, may be referred to as Tsf) is a temperature when M ═ Msf, Tsf < Tgpf 1.

When the extended range electric vehicle is in a hybrid drive mode (i.e., the engine is on) and T > Tsf, the shutdown function is inhibited from being activated, if the system requests the engine to be shut down at that time:

(1) the engine is first run to a first power at which the engine exhaust temperature is low; (2) and after Tgpf is less than Tsf, stopping the stop function, and stopping the engine normally.

The engine speed corresponding to P1 may be an idle speed and the engine output torque may be zero torque.

Referring to FIG. 15, a schematic diagram is shown that divides the active regions of the engine's tow-over function and the inhibit-stop function according to the carbon load of the GPF and the temperature of the GPF. As shown in fig. 15:

in region 1, extended range electric vehicles may employ a multi-power following strategy, in which the control strategy may not take into account the carbon loading effects of the GPF.

In the areas 2, 3 and 4, the extended range electric vehicle can adopt a thermostat control strategy, in the areas, the control strategy of the extended range electric vehicle needs to consider the influence of carbon load of GPF, and the strategy is made to fully consider GPF regeneration and active safety control;

in zone 2 may be an engine tow-back function off zone;

zone 3 may be an engine tow-back function activation zone;

zone 4 may prohibit the fuel cut-off function from activating the zone.

Referring to fig. 16, which shows a block diagram of a control device of an extended range electric vehicle according to an exemplary embodiment of the present application, the control device 1600 may be the control device 120 in the embodiment of fig. 1 or a component of the control device 120, and includes:

an obtaining module 1610, configured to perform step 301, step 302, step 401, step 402, step 501, step 502, step 701, step 702, step 901, step 902, step 1101, step 1301, step 1401, and other implicitly obtained steps.

A processing module 1620 configured to perform step 303, step 304, step 403, step 404, step 503, step 504a, step 504b, step 505a, step 505b, step 601, step 602a, step 602b, step 603, step 604, step 605, step 703, step 704a, step 704b, step 705a, step 705b, step 706a, step 706b, step 801, step 802a, step 802b, step 803, step 804, step 805, step 903, step 904a, step 904b, step 905a, step 905b, step 1001, step 1002a, step 1002b, step 1104, step 1004, step 1005, step 1102, step 1103a, step 1103b, step a, step 1104b, step 1302, step 1303, step 1304, step 1402, step 1403, step 1404, and other implicit processing steps.

Referring to fig. 17, a block diagram of a control apparatus of an extended range electric vehicle according to an exemplary embodiment of the present application is shown. The control apparatus 1700 may be the control device 120 in the embodiment of fig. 1 or an integral part of the control device 120, and includes: a processor 1710, and a memory 1720.

Processor 1710 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processor 1710 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The memory 1720 is coupled to the processor 1710 via a bus or other means, and the memory 1720 has stored therein at least one instruction, at least one program, set of codes, or set of instructions that are loaded into and executed by the processor 1710 to implement any of the above method embodiments. The memory 1720 may be a volatile memory (or a volatile memory), a non-volatile memory (or a non-volatile memory), or a combination thereof. The volatile memory may be a random-access memory (RAM), such as a static random-access memory (SRAM) or a dynamic random-access memory (DRAM). The nonvolatile memory may be a Read Only Memory (ROM), such as a Programmable Read Only Memory (PROM), an Erasable Programmable Read Only Memory (EPROM), and an Electrically Erasable Programmable Read Only Memory (EEPROM). The non-volatile memory may also be a flash memory, a magnetic memory, such as a magnetic tape, a floppy disk, or a hard disk. The non-volatile memory may also be an optical disc.

The present application further provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set, or an instruction set is stored, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the control method of the extended range electric vehicle provided by the above method embodiment.

The present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of controlling an extended range electric vehicle as described in the above aspects.

The present application further provides an extended range electric vehicle including the power system 100 of the embodiment of fig. 1.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the scope of the invention as expressed herein.

Claims

1. A control method of an extended range electric vehicle is characterized by comprising the following steps:

acquiring the carbon capacity of a particle trap GPF of the extended range electric vehicle;

when the carbon loading is higher than the first carbon loading, acquiring the speed of the extended range electric vehicle and the state of charge of a storage battery of the extended range electric vehicle;

determining whether an engine of the extended range electric vehicle needs to be started or not based on a carbon loading interval and a state of charge interval, wherein the carbon loading interval is an interval to which the carbon loading belongs in at least two carbon loading intervals, and the state of charge interval is an interval to which the state of charge belongs in at least two state of charge intervals;

when it is determined that it is necessary to start the engine, the power of the engine is determined among at least two preset powers based on a speed interval to which the speed belongs among the at least two speed intervals, the preset powers being power values calculated based on the temperature of the GPF and the fuel economy of the engine.

2. The method of claim 1, wherein the at least two carbon loading intervals comprise a first carbon loading interval, a second carbon loading interval, and a third carbon loading interval;

3. The method of claim 2, wherein the at least two speed intervals comprise a first speed interval and a second speed interval;

wherein the first speed is greater than the second speed.

4. The method of claim 3, wherein the at least two preset powers comprise a first power, a second power, and a third power;

5. The method of claim 4, wherein the temperature of the GPF is greater when the engine is operating at the second power than when the engine is operating at the first power;

6. The method of claim 5, wherein determining whether the engine needs to be started based on the carbon load interval and the state of charge interval comprises:

when the carbon loading amount belongs to the first carbon loading amount interval, determining whether a first starting condition is met according to the charge state, wherein the first starting condition is that the requirement of the engine on the charge state needs to be started when the carbon loading amount belongs to the first carbon loading amount interval;

7. The method of claim 6, wherein said determining whether a first turn-on condition is satisfied based on said state of charge comprises:

8. The method of claim 7, wherein after determining whether the speed belongs to the first speed interval, further comprising:

9. The method of claim 8, wherein after determining whether the state of charge of the battery of the extended range electric vehicle is greater than the first state of charge threshold, further comprising:

10. The method of claim 9, wherein said determining if said state of charge is greater than a second state of charge threshold further comprises:

11. The method of claim 10, wherein after determining whether the extended range electric vehicle is in the electric drive mode, further comprising:

12. The method of claim 11, wherein determining whether the engine needs to be started based on the carbon load interval and the state of charge interval comprises:

when the carbon loading capacity belongs to the second carbon loading capacity interval, determining whether a second starting condition is met according to the charge state, wherein the second starting condition is that the charge state of the engine needs to be started when the carbon loading capacity belongs to the second carbon loading capacity interval, and the requirement of the second starting condition on the charge state is lower than that of the first starting condition;

13. The method of claim 12, wherein said determining whether a second turn-on condition is satisfied based on said state of charge comprises:

14. The method of claim 13, wherein after determining whether the speed belongs to the second speed interval, further comprising:

15. The method of claim 14, wherein after determining whether the speed belongs to the first speed interval, further comprising:

determining the power of the engine to be the second power when the speed does not belong to the first speed section and belongs to the second speed section.

16. The method of claim 15, wherein after determining whether the state of charge is greater than a third state of charge threshold, further comprising:

17. The method of claim 16, wherein after determining whether the state of charge is greater than a fourth state of charge threshold, further comprising:

18. The method of claim 17, wherein after determining whether the extended range electric vehicle is in the electric drive mode, further comprising:

19. The method of claim 18, wherein determining whether the engine needs to be started based on the carbon load interval and the state of charge interval comprises:

when the carbon loading capacity belongs to the third carbon loading capacity interval, determining whether a third opening condition is met according to the charge state, wherein the third opening condition is that the charge state of the engine needs to be started when the carbon loading capacity belongs to the third carbon loading capacity interval, and the requirement of the third opening condition on the charge state is lower than the second opening condition;

20. The method of claim 19, wherein said determining whether a third enabling condition is satisfied based on said state of charge comprises:

21. The method of claim 20, wherein after determining whether the speed belongs to the second speed interval, further comprising:

22. The method of claim 21, wherein after determining whether the state of charge of the battery of the extended range electric vehicle is greater than a fifth state of charge threshold, further comprising:

23. The method of claim 22, wherein said determining if said state of charge is greater than a sixth state of charge threshold further comprises:

24. The method of claim 23, wherein after determining whether the extended range electric vehicle is in the electric drive mode, further comprising:

25. The method of claim 5, further comprising:

26. The method of claim 25, wherein said determining whether said engine needs to be shut down comprises:

27. The method of claim 26, wherein after determining whether the required power of the extended range electric vehicle is less than the sum of the first power and the first power difference, further comprising:

the engine is shut down.

28. The method of claim 27, wherein after said determining whether said engine is on, further comprising:

29. The method of claim 28, wherein said determining whether said engine needs to be turned on comprises:

30. The method of claim 29, wherein said determining whether said engine needs to be turned on comprises:

determining whether the required power is greater than the third power;

31. The method of claim 30, wherein said determining the power of the engine among at least two preset powers comprises:

32. The method of claim 31, wherein after the adjusting the power from the first power to the second power, further comprising:

33. The method of claim 32, wherein after the adjusting the power from the second power to the third power, further comprising:

34. The method of claim 31, wherein after the adjusting the power from the first power to the second power, further comprising:

35. The method of claim 32, wherein after the adjusting the power from the second power to the third power, further comprising:

36. The method of claim 33 or 34, wherein said determining the power of the engine among at least two preset powers comprises:

37. The method of claim 5, wherein the at least two carbon loading intervals comprise a fourth carbon loading interval, the fourth carbon loading interval being an interval in which a carbon loading greater than the first carbon loading and less than a fourth carbon loading is present;

when the temperature of the GPF is less than the first temperature, stopping motoring activity of the generator until the engine is stopped.

38. The method of claim 37, wherein determining whether the engine needs to be shut down when the temperature of the GPF is greater than a second temperature and the engine is already on, the second temperature being less than the first temperature;

stopping the engine when the temperature of the GPF is less than the second temperature.

39. A control device for an extended range electric vehicle, comprising:

the processing module is used for determining whether an engine of the extended range electric vehicle needs to be started or not based on a carbon capacity interval and a charge state interval, wherein the carbon capacity interval is an interval to which the carbon capacity belongs in at least two carbon capacity intervals, and the charge state interval is an interval to which the charge state belongs in at least two charge state intervals; when it is determined that it is necessary to start the engine, the power of the engine is determined among at least two preset powers based on a speed interval to which the speed belongs among the at least two speed intervals, the preset powers being power values calculated based on the temperature of the GPF and the fuel economy of the engine.

40. A control apparatus of an extended range electric vehicle, the apparatus comprising a processor and a memory, the memory having stored therein at least one instruction or program, the instruction or program being loaded and executed by the processor to implement the control method of an extended range electric vehicle according to any one of claims 1 to 38.

41. A computer readable storage medium having stored therein at least one instruction or program, the instruction or program being loaded and executed by a processor to implement the method of controlling an extended range electric vehicle as claimed in any one of claims 1 to 38.

42. An extended range electric vehicle comprising a range extender and a control apparatus according to claim 40.