CN112160857B - Dual-motor vehicle engine control method and device, vehicle and storage medium - Google Patents
Dual-motor vehicle engine control method and device, vehicle and storage medium Download PDFInfo
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- CN112160857B CN112160857B CN202011035316.6A CN202011035316A CN112160857B CN 112160857 B CN112160857 B CN 112160857B CN 202011035316 A CN202011035316 A CN 202011035316A CN 112160857 B CN112160857 B CN 112160857B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0859—Circuits or control means specially adapted for starting of engines specially adapted to the type of the starter motor or integrated into it
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a method and a device for controlling an engine of a double-motor vehicle, the vehicle and a storage medium. The method comprises the following steps: when the running state change signal is monitored, determining an engine running mode according to the running state change signal; when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, determining a working motor corresponding to the engine operation mode; and controlling the engine to operate through the working motor. According to the invention, the motor which is most suitable for working at the current moment is selected according to the conditions by acquiring the running state change signal and actually acquiring the current state of the vehicle, so that the start and stop of the engine are effectively controlled, the problem that the engine of the dual-motor hybrid vehicle is difficult to start and stop under different working conditions is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle design, in particular to a method and a device for controlling a dual-motor vehicle engine, a vehicle and a storage medium.
Background
Compared with the traditional vehicle, the hybrid vehicle is additionally provided with the motor and the power battery, a starter is not needed in the starting and stopping process of the engine, and the starting and stopping functions of the engine can be realized by utilizing the battery and the motor. The conventional double-motor vehicle can only control the start and stop of the generator through a designated motor under a specific working condition, and when the motor fails, the start and stop function of the engine cannot be realized, so that the vehicle fails to run. Therefore, how to coordinate the operation of the dual-motor system and reasonably control the start and stop of the engine is a key problem to be solved at present.
Disclosure of Invention
The invention provides a method and a device for controlling an engine of a double-motor vehicle, the vehicle and a storage medium, which are used for solving the problem that the engine of a hybrid vehicle is difficult to start and stop under different working conditions, realizing the effect of accurately controlling the start and stop of the engine and improving the driving performance, the comfort and the economy of the vehicle.
In a first aspect, an embodiment of the present invention provides a dual-motor vehicle engine control method, including:
when the running state change signal is monitored, determining an engine running mode according to the running state change signal;
when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, determining a working motor corresponding to the engine operation mode;
and controlling the engine to operate through the working motor.
Optionally, the determining the working motor corresponding to the engine operating mode includes:
determining a preferred motor and an alternative motor corresponding to the engine operation mode according to a preset mode motor corresponding table;
acquiring a motor state of the preferred motor, and determining the preferred motor as a working motor when the motor state is normal; if not, then,
determining the alternative motor to be the working motor.
Optionally, the method further includes:
and when the motor state of the preferred motor is abnormal, determining the motor abnormal grade and giving an alarm.
Optionally, the operation precondition includes a vehicle speed condition, a vehicle gear condition, a battery allowable power condition, a battery electric quantity condition, a vehicle start-stop key trigger condition, an air conditioner switch condition, a brake vacuum degree condition and/or an engine water temperature condition.
Optionally, the operation state change signal includes an engine start signal, an engine stop signal and an engine power generation signal;
correspondingly, the determining the engine operation mode according to the operation state change signal comprises the following steps:
determining that the engine start-stop mode is a stop-start mode if the operation state change signal is the engine start signal;
determining that the engine start-stop mode is a stop-stop mode if the operating state change signal is the engine stop signal;
and if the running state change signal is the engine power generation signal, determining that the engine start-stop mode is a stop power generation mode.
Optionally, the method further includes:
when the running state change signal is the engine starting signal, acquiring a starting count value;
and if the starting count value is a preset first starting value, determining that the engine operation mode is a first starting mode.
Optionally, the controlling the engine operation by the working motor includes:
when the engine start-stop mode is the stop start mode or the first start mode, controlling the engine to start through the working motor;
when the engine start-stop mode is the stop-stop mode, controlling the engine to stop by the working motor;
and when the engine start-stop mode is the stop power generation mode, controlling the engine to charge a battery through the working motor.
In a second aspect, an embodiment of the present invention further provides a dual-motor vehicle engine control apparatus, including:
the operation mode determining module is used for determining an engine operation mode according to the operation state change signal when the operation state change signal is monitored;
the working motor determining module is used for determining a working motor corresponding to the engine operation mode when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode;
and the engine operation module is used for controlling the operation of the engine through the working motor.
In a third aspect, an embodiment of the present invention further provides a vehicle, including:
one or more processors;
a memory for storing one or more programs;
two motors;
an engine;
when executed by the one or more processors, cause the one or more processors to implement a dual motor vehicle engine control method according to any embodiment of the invention.
In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions for performing a dual-motor vehicle engine control method according to any of the embodiments of the present invention when executed by a computer processor.
According to the invention, the engine operation mode is determined according to the operation state change signal when the operation state change signal is monitored, and the working motor corresponding to the engine operation mode is determined when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, and the operation of the engine is controlled through the working motor. According to the invention, the motor which is most suitable for working at the current moment is selected according to the conditions by acquiring the running state change signal and actually acquiring the current state of the vehicle, so that the start and stop of the engine are effectively controlled, the problem that the engine of the dual-motor hybrid vehicle is difficult to start and stop under different working conditions is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
Drawings
FIG. 1 is a flow chart of a method for controlling an engine of a dual motor vehicle according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for determining operating motors in a method for controlling an engine of a dual motor vehicle according to an embodiment of the present invention;
fig. 3 is a block diagram of a dual-motor vehicle engine control device according to a second embodiment of the present invention;
fig. 4 is a block diagram of a vehicle according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only a part of the structures related to the present invention, not all of the structures, are shown in the drawings, and furthermore, embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Example one
Fig. 1 is a flowchart of a method for controlling an engine of a dual-motor vehicle according to an embodiment of the present invention, where the embodiment is applicable to controlling start and stop of the engine during running of the dual-motor vehicle, and the method may be executed by an engine control device of the dual-motor vehicle, where the engine control device may be implemented by software and/or hardware.
As shown in fig. 1, the method specifically includes the following steps:
and step 110, when the running state change signal is monitored, determining the running mode of the engine according to the running state change signal.
The operating state change signal can be understood as a trigger signal for changing the current state of the engine. Engine operating mode may be understood as a mode of operation requiring engine operation. For example, a driver starts a vehicle by a vehicle key, when the key rotates from the Ignition position to the Start position, the driver can be considered to be starting the vehicle, and at the moment, the key rotates from the Ignition position to the Start position to be determined as an operation state change signal, and the corresponding engine operation mode can be an engine starting mode; when a driver steps on a brake pedal to enable the pressure of a brake master cylinder to be larger than a threshold value or steps on the brake pedal and a vehicle gear shift lever is placed in a P gear or an N gear in the driving process of a vehicle, the driver can be considered to want to decelerate and stop the vehicle, the running state change signal can be determined when the driver steps on the brake pedal and places the vehicle gear shift lever in the P gear or the N gear, and the corresponding engine running mode can be an engine stopping mode; after the vehicle is stopped for a short time, monitoring that the acceleration of the vehicle is greater than a certain threshold value, or the brake vacuum degree is less than a certain threshold value, or a user starts an air conditioner and the like, wherein the vehicle can be considered to be restarted at the moment, and the acceleration is greater than the certain threshold value, the brake vacuum degree is less than the certain threshold value, and the user starts the air conditioner to determine as an operation state change signal, and the corresponding engine operation mode can be an engine starting mode; when the vehicle is in a parking state and when the battery residual quantity is monitored to be smaller than a certain threshold value, the generator is considered to need to be restarted at the moment to charge the vehicle battery, therefore, the running state change signal can be determined when the battery residual quantity is smaller than the certain threshold value, and the corresponding engine running mode can be an engine charging mode.
Specifically, various state parameters of the vehicle can be monitored in real time, and when the running state change signal is monitored, the running mode of the engine, which needs to be realized at the moment, can be judged according to the running state change signal, and the running mode is determined as the running mode of the engine.
Alternatively, the operating state change signal may include an engine start signal, an engine stop signal, and an engine power generation signal.
Correspondingly, if the running state change signal is an engine starting signal, the engine starting and stopping mode can be determined to be a stopping and starting mode; if the running state change signal is an engine stop signal, determining that the engine start-stop mode is a stop-stop mode; if the operating state change signal is an engine power generation signal, it may be determined that the engine start-stop mode is a stop power generation mode.
Specifically, the different operation state change signals may be divided into several different signal types in advance, for example, the different operation state change signals may be divided into an engine start signal, an engine stop signal, and an engine power generation signal, and when the monitored operation state change signal belongs to the engine start signal, the engine start-stop mode may be determined as the stop-start mode; similarly, when the monitored running state change signal belongs to the engine stop signal, the engine start-stop mode can be determined to be the stop-stop mode; when the monitored operating state change signal belongs to the engine power generation signal, the engine start-stop mode can be determined as the stop power generation mode.
Optionally, when the running state change signal is an engine start signal, a start count value may be obtained; if the start count value is a preset first start value, the engine operating mode may be determined to be a first start mode.
Specifically, when the operation state change signal belongs to an engine start signal, the operation mode of the engine may be further subdivided, and at this time, a start count value may be obtained to determine whether the engine is started for the first time within a certain time. The engine operating mode may be determined as a first start mode after the determination is a first start. The starting count value can be obtained by starting an internal counter by an engine of the vehicle, the starting value can be set to be 1 for the first time, the counter is increased by 1 every time the vehicle is started in a short time, and when the vehicle finishes all running tasks of the current running and the stop time exceeds the threshold time, the internal counter is reset.
And step 120, when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, determining a working motor corresponding to the engine operation mode.
The operation precondition can be understood as a precondition to be achieved when the operation mode of the engine is changed, and it can be understood that different engine operation modes correspond to different operation preconditions, and the operation precondition can also include preconditions with multiple dimensions. The working motor may be understood as a target motor to be controlled to operate the motor.
Specifically, after the engine operation mode is determined, the corresponding operation precondition can be determined according to the engine operation mode, whether the current state of the vehicle acquired in real time meets the operation precondition is judged, when the operation precondition is met, the engine has a basic precondition for operation, and at the moment, a working motor for driving the generator to operate can be determined. The determination of the working motor can be determined by the engine operation mode and the current state conditions of the two motors, and when one motor fails, the other motor can be determined as the working motor so as to ensure the normal operation of the engine.
Optionally, the operation precondition may include: the method comprises the following steps of vehicle speed conditions, vehicle gear conditions, battery allowable power conditions, battery electric quantity conditions, vehicle start-stop key triggering conditions, air conditioner switch conditions, brake vacuum degree conditions and/or engine water temperature conditions.
And step 130, controlling the engine to operate through the working motor.
Specifically, when the working motor corresponding to the engine operation mode at the current moment is determined, the working motor can be controlled to control the engine to operate according to the engine operation mode, so that the vehicle can run stably or park.
According to the technical scheme of the embodiment, the engine operation mode is determined according to the operation state change signal when the operation state change signal is monitored, the working motor corresponding to the engine operation mode is determined when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, and the operation of the engine is controlled through the working motor. According to the invention, the motor which is most suitable for working at the current moment is selected according to the conditions by acquiring the running state change signal and actually acquiring the current state of the vehicle, so that the start and stop of the engine are effectively controlled, the problem that the engine of the dual-motor hybrid vehicle is difficult to start and stop under different working conditions is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
Optionally, when the engine start-stop mode is a stop start mode or a first start mode, controlling the engine to start through the working motor;
when the engine start-stop mode is the stop mode, controlling the engine to stop by the working motor;
when the engine start-stop mode is the stop power generation mode, the engine is controlled to charge the battery through the working motor.
Fig. 2 is a flowchart of a method for determining operating motors in a method for controlling an engine of a dual-motor vehicle according to an embodiment of the present invention. As shown in fig. 2, on the basis of the above technical solution, step 120 may include the following specific steps:
and 1201, when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, determining a preferred motor and an alternative motor corresponding to the engine operation mode according to a preset mode motor corresponding table.
The mode motor mapping table can be understood as a relational mapping table between the engine operation mode and the preferred motor. The preferred electric machine may be understood as the target operating electric machine first selected in a certain engine operating mode. Alternative motors it is possible to understand the alternative working motor that is used when the preferred motor fails.
Specifically, when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, a preset mode motor correspondence table can be called, a preferred motor corresponding to the engine operation mode determined at the current moment is inquired, and after the preferred motor is determined, the other motor in the double motors can be determined as a candidate motor.
And step 1202, acquiring the motor state of the preferred motor and judging that the motor state is normal.
Specifically, after the preferred motor is determined in the two motors, the motor state of the motor can be obtained, and whether the motor state is normal or not can be checked, for example, whether the allowable torque of the preferred motor is larger than an allowable threshold value or not can be checked, and whether the capability of the preferred motor meets the engine start-stop requirement or not can be judged. When the motor state is normal, go to step 1203; otherwise, go to step 1204.
Specifically, after the motor state of the preferred motor is determined to be normal, the capability of the preferred motor can meet the start-stop requirement of the engine, and the preferred motor can be determined as the working motor.
And step 1204, determining the alternative motor as a working motor.
Specifically, when the motor state of the first-selected motor is determined to be abnormal, it is indicated that the capability of the first-selected motor cannot meet the start-stop requirement of the engine, and at the moment, the alternative motor can be determined to be the working motor, so that the problem that the start-stop function of the engine cannot be realized and the driving performance of the whole vehicle is influenced is avoided.
Optionally, when the motor state of the preferred motor is abnormal, the motor abnormal level is determined and an alarm prompt is given.
Specifically, when the first-selected motor fails or both motors fail, the vehicle can be controlled to enter a limping mode, the motor abnormal level is determined according to the motor state, the driver is prompted through the instrument characters as to which motor fails, and the failure reason is conveniently checked as soon as possible.
For example, table 1 is a Control strategy table of a first-time startup mode, in which a two-Motor Hybrid vehicle may include an Engine, an M1 Motor, an M2 Motor, a power Battery, an integrated inverter, a clutch, a transmission, a 12V Battery, and the like, and may also include controllers of related assemblies, such as a Hybrid Control Unit (HCU), an Engine controller (EMS), a Motor controller MCU1 of an M1 Motor, a Motor controller MCU2 (MCU) of an M2 Motor, a Battery Management System (BMS), and the like. The engine can be in three states of stopping, starting and starting, the M1 motor and the M2 motor can be in four states of stopping, following rotation, electric driving and power generation, the clutch can be in two states of opening and closing, and the gear states can comprise a parking gear, a reverse gear, a neutral gear and a forward gear. When the triggering of a starting key from Ignition to Start is monitored, the operation mode of the engine is determined to be a first starting mode, whether the current state of the vehicle simultaneously meets three operation precondition that the vehicle speed is 0, the vehicle gear is P gear or N gear, and the allowable battery power is larger than a threshold value is judged, wherein the threshold value can be preset and changed according to the vehicle model, when the current state of the vehicle meets the operation precondition, the M1 motor is determined to be a preferred motor, if the M1 motor has no fault and the allowable torque is larger than the allowable threshold value, the M1 motor is determined to be a working motor, the HCU controls the MCU1, and the engine is started through the M1 motor. The state of the engine at this time may be "Crank", which indicates a state where the engine is at the moment of starting; the state of the M2 Motor is 'Off' and stopped, and the state of the M1 Motor is 'Motor', which indicates that the M1 Motor controls the starting of the engine; the state of the clutch is "Open", which means that the clutch is in an Open state; the gear of the vehicle is in a parking gear P or a neutral gear N. The first start utilizes the M1 motor to realize the quick start of the engine by using smaller energy, thereby shortening the starting time of the engine and improving the driving property, the comfort and the fuel economy of the vehicle, because the fuel consumption in the starting process of the engine is higher compared with the traditional vehicle. When the M1 motor fails or the allowable torque capacity is insufficient and the first starting cannot be carried out, the HCU is required to judge whether the capacity of the M2 motor is enough, if the capacity is enough, the M2 motor can be used for starting the engine, and the HCU controls the MCU2, controls the clutch to be closed and starts the engine through the M2 motor.
TABLE 1 control strategy table for the first startup mode
For example, table 2 is a control strategy table for the parking and stopping mode in P-range or N-range, wherein two motors in a two-motor vehicle can be respectively represented by M1 motor and M2 motor. In the running process of a vehicle, when it is monitored that a driver steps on a brake pedal to decelerate and stop the vehicle and the driver puts a gear lever of the vehicle into a P gear or an N gear, the engine running mode is determined to be a parking stop mode under the P gear or the N gear, at the moment, whether the current state of the vehicle simultaneously meets six running precondition that the vehicle speed is 0, a start-stop function key is triggered, no refrigeration or warm air requirement exists, an air conditioner has a start request but is less than 2s (can be marked), the brake vacuum degree is greater than a threshold value, a battery SOC value is greater than 36% (can be marked), and the water temperature of the engine is greater than 40 ℃, wherein the threshold value can be preset and changed according to the model of the vehicle, and when the vehicle is met, an HCU controls an EMS (electronic management system) to stop an M1 motor and an M2 motor to stop the engine in a fuel cut-off manner. The state of the engine at this time may be "Off", indicating a stopped state; the state of the M1 motor and the M2 motor is "Off" shutdown; the state of the clutch is "Open", which means that the clutch is in an Open state; the gear of the vehicle is in a parking gear P or a neutral gear N. When the double motors break down, the vehicle is controlled to enter a LimpHome mode, and the instrument words prompt a driver which motor breaks down to remind the driver to stop the vehicle as soon as possible.
TABLE 2 control strategy table for parking and stopping mode under P gear or N gear
For example, table 3 is a control strategy table for a parking mode in D-range or R-range, wherein two motors in a two-motor vehicle can be represented by M1 motor and M2 motor, respectively. In the running process of a vehicle, when it is monitored that a driver steps on a brake pedal, the pressure of a brake master cylinder is greater than a threshold value, and a vehicle gear lever is positioned in a D gear or an R gear, the operation mode of an engine is determined to be a parking stop mode under the D gear or the R gear, at the moment, whether the current state of the vehicle simultaneously meets six operation precondition that the vehicle speed is 0, a start-stop function key is triggered, no refrigeration or warm air requirement is required, an air conditioner has a start request but is less than 2s (can be marked), the brake vacuum degree is greater than the threshold value, the SOC value of a battery is greater than 36% (can be marked), and the water temperature of the engine is greater than 40 ℃, wherein the threshold value can be preset and changed according to the model of the vehicle, when the conditions are met, an HCU controls an EMS (electronic message service) to stop an M1 motor and an M2 motor, so that the engine is shut down when the fuel is cut off. The state of the engine at this time may be "Off", indicating a stopped state; the state of the M1 motor and the M2 motor is "Off" shutdown; the state of the clutch is "Open", which means that the clutch is in an Open state; the gears of the vehicle are in a forward gear "D gear" or a reverse gear "R gear". When the double motors break down, the vehicle is controlled to enter a LimpHome mode, and the instrument words prompt a driver which motor breaks down to remind the driver to stop the vehicle as soon as possible.
TABLE 3 control strategy table for parking and stopping mode in D gear or R gear
For example, table 4 is a control strategy table for a P-range or N-range park-start mode, wherein two motors in a two-motor vehicle can be respectively represented by M1 motor and M2 motor. During the running process of the vehicle, for example, after waiting for a traffic light or stopping for a short time, when any signal that air conditioner refrigeration is started or PTC hot air is required is monitored, or the brake vacuum degree is smaller than a threshold value (namely the vehicle does not meet the brake requirement), or the battery SOC is smaller than a threshold value (can be marked), or the accelerator pedal is larger than a threshold value 2% (can be marked), whether the current state of the vehicle simultaneously meets four operation precondition that the vehicle speed is 0, the vehicle gear shift lever is in a P gear or an N gear, a start-stop function key is triggered, and the battery allowable power is larger than the threshold value is judged, wherein the threshold value can be preset and changed according to the vehicle model, when the condition is met, the M2 motor is determined to be a preferred motor, if the M2 motor has no fault and the allowable torque is larger than the allowable threshold value, the M2 motor is determined to be a working motor, and the engine is started through the M2 motor. The state of the engine at this time may be "Crank", which indicates a state where the engine is at the moment of starting; the state of the M1 Motor is 'Off' and stopped, and the state of the M2 Motor is 'Motor', which indicates that the M2 Motor controls the starting of the engine; the state of the clutch is "Close", indicating that the clutch is in a closed state; the gear of the vehicle is in a parking gear P or a neutral gear N. When the M2 motor has a fault or the torque capacity is insufficient, the M1 motor can be used for starting the engine, the MCU1 is controlled at the moment, the engine is started through the M1 motor, and meanwhile, the HCU receives a fault level signal of the MCU2 and gives an alarm.
TABLE 4 control strategy table for P-gear or N-gear parking start mode
For example, table 5 is a control strategy table for a park-start mode in D-range or R-range, wherein two motors in a two-motor vehicle can be represented by M1 motor and M2 motor, respectively. During the running process of the vehicle, for example, after waiting for a traffic light or stopping for a short time, when any signal that air conditioner refrigeration is started or PTC hot air is required or the brake vacuum degree is smaller than a threshold value (namely the vehicle does not meet the brake requirement) or the battery SOC is smaller than the threshold value (can be marked) is monitored, whether the current state of the vehicle simultaneously meets four operation precondition that the vehicle speed is 0, the vehicle gear shift lever is in a D gear or an R gear, a start-stop function key is triggered and the battery allowable power is larger than the threshold value is judged, wherein the threshold value can be preset and changed according to the vehicle model, when the current state of the vehicle meets the four operation precondition that the M2 motor is the preferred motor, if the M2 motor has no fault and the allowable torque is larger than the allowable threshold value, the M2 motor is determined to be the working motor, and the engine is started through the M2 motor. The state of the engine at this time may be "Crank", which indicates a state where the engine is at the moment of starting; the state of the M1 Motor is 'Off' and stopped, and the state of the M2 Motor is 'Motor', which indicates that the M2 Motor controls the starting of the engine; the state of the clutch is "Close", indicating that the clutch is in a closed state; the gears of the vehicle are in a forward gear "D gear" or a reverse gear "R gear". When the M2 motor has a fault or the torque capacity is insufficient, the M1 motor can be used for starting the engine, the MCU1 is controlled at the moment, the engine is started through the M1 motor, and meanwhile, the HCU receives a fault level signal of the MCU2 and gives an alarm.
TABLE 5 control strategy table for D gear or R gear parking start mode
For example, table 6 is a control strategy table for the power generation mode of parking in P-gear or N-gear, wherein two motors in a two-motor vehicle can be respectively represented by M1 motor and M2 motor. In the running process of the vehicle, when the SOC of the battery is monitored to be less than 30 percent (can be marked), whether the current state of the vehicle simultaneously meets three operation preconditions that the vehicle speed is 0, a vehicle gear shift lever is positioned in a P gear or an N gear, and an engine is in a working state is judged, wherein threshold values can be preset and changed according to the model of the vehicle, when the threshold values are met, the motor M1 is determined to be a preferred motor, if the motor M1 has no fault and the allowable torque is larger than the allowable threshold value, the motor M1 is determined to be a working motor, the HCU controls the MCU1, and the battery is charged by the electricity generated by the motor M1. In the charging process, the battery charging capacity and the DCDC power demand need to be considered, if the power demand reference value is P1, the engine can be controlled to maintain a certain target rotating speed n1, the power generation torque is T1, when the battery charging capacity and the demand value of the electric appliance are greater than P1, the rotating speed of the engine needs to be gradually increased along with the increase of the power generation amount, the target rotating speed is increased to n2, the power generation torque is increased to T2, and at the moment, the n2-n1< DELTAn and the T2-T1< DELTAT are controlled through regulation of the set MAP, so that the battery overvoltage caused by overcharging is avoided. At this time, the state of the engine can be 'On', which indicates that the engine is in an open state; the state of the M2 motor is "Off" shutdown, and the state of the M1 motor is "Generator", which indicates that the M1 motor is in a power generation state; the state of the clutch is "Open", which means that the clutch is in an Open state; the gear of the vehicle is in a parking gear P or a neutral gear N. When the M1 motor breaks down and can not be charged, the battery can be charged by using the M2 motor, the MCU2 is controlled by the HCU at the moment, the clutch is controlled to be closed, and the battery is charged by using the M2 motor so as to meet the power consumption requirements of battery charging and electrical appliances. Meanwhile, a fault grade signal of the MCU1 is received, and alarm prompt is carried out.
TABLE 6 control strategy table for power generation mode of parking under P gear or N gear
For example, table 7 is a control strategy table for a parking power generation mode in D range or R range, wherein two motors in a two-motor vehicle can be represented by M1 motor and M2 motor, respectively. In the running process of the vehicle, when the SOC of the battery is monitored to be less than 30 percent (can be marked), whether the current state of the vehicle simultaneously meets four operation precondition that the vehicle speed is 0, a vehicle gear shift lever is positioned in a D gear or an R gear, an engine is already in a working state, and the pressure of a brake master cylinder is greater than a threshold value is judged, wherein the threshold value can be preset and changed according to the model of the vehicle, when the current state of the vehicle meets the operation precondition, the M1 motor is determined to be a preferred motor, if the M1 motor does not have a fault and the allowable torque is greater than the allowable threshold value, the M1 motor is determined to be a working motor, and the HCU controls the MCU1 to generate electricity through the M1 motor to charge the battery. In the charging process, the battery charging capacity and the DCDC power demand need to be considered, if the power demand reference value is P1, the engine can be controlled to maintain a certain target rotating speed n1, the power generation torque is T1, when the battery charging capacity and the demand value of the electric appliance are greater than P1, the rotating speed of the engine needs to be gradually increased along with the increase of the power generation amount, the target rotating speed is increased to n2, the power generation torque is increased to T2, and at the moment, the n2-n1< DELTAn and the T2-T1< DELTAT are controlled through regulation of the set MAP, so that the battery overvoltage caused by overcharging is avoided. At this time, the state of the engine can be 'On', which indicates that the engine is in an open state; the state of the M2 motor is "Off" shutdown, and the state of the M1 motor is "Generator", which indicates that the M1 motor is in a power generation state; the state of the clutch is "Open", which means that the clutch is in an Open state; the gears of the vehicle are in a forward gear "D gear" or a reverse gear "R gear". When the M1 motor breaks down and can not be charged, the battery can be charged by using the M2 motor, the MCU2 is controlled by the HCU at the moment, the clutch is controlled to be closed, and the battery is charged by using the M2 motor so as to meet the power consumption requirements of battery charging and electrical appliances. Meanwhile, a fault grade signal of the MCU1 is received, and alarm prompt is carried out.
TABLE 7 control strategy table for D-gear or R-gear parking power generation mode
The technical scheme of the embodiment includes that different running state change signals are divided into a plurality of different signal types in advance, when the running state change signals are monitored, corresponding engine running modes are determined according to the signal types of the running state change signals, whether an engine is started for the first time within a certain time is judged when the running state change signals are engine starting signals, the engine running modes are further subdivided, after the engine running modes are determined, the current state of a multi-dimensional vehicle is judged, whether running precondition conditions corresponding to the engine running modes are met is detected, when the current state of the vehicle meets the running precondition conditions corresponding to the engine running modes, a first motor and an alternative motor corresponding to the engine running modes are determined according to a preset mode motor corresponding table, and the motor state of the first motor is detected, and determining a working motor corresponding to the engine operation mode, determining the alternative motor as the working motor when the motor state of the preferred motor is abnormal, and controlling the engine to operate according to the engine operation mode through the working motor. According to the invention, through the acquired running state change signal and the actual acquisition of the current state of the vehicle, the motor which is most suitable for working at the current moment is selected from the two motors of the double-motor vehicle according to different conditions, and when one motor fails or has insufficient torque capacity, the other motor can be switched to work immediately, so that the start and stop of the engine are effectively controlled, the problem that the start and stop of the engine are difficult in different working conditions of the double-motor hybrid vehicle is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
Example two
The dual-motor vehicle engine control device provided by the embodiment of the invention can execute the dual-motor vehicle engine control method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. Fig. 3 is a block diagram of a control apparatus for an engine of a dual-motor vehicle according to a second embodiment of the present invention, and as shown in fig. 3, the apparatus includes: an operating mode determination module 310, a work motor determination module 320, and an engine operation module 330.
The operation mode determination module 310 is configured to determine an engine operation mode according to the operation state change signal when the operation state change signal is monitored.
The working motor determining module 320 is configured to determine a working motor corresponding to the engine operation mode when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode.
An engine operation module 330 for controlling engine operation via the work motor.
According to the technical scheme of the embodiment, the engine operation mode is determined according to the operation state change signal when the operation state change signal is monitored, the working motor corresponding to the engine operation mode is determined when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, and the operation of the engine is controlled through the working motor. According to the invention, the motor which is most suitable for working at the current moment is selected according to the conditions by acquiring the running state change signal and actually acquiring the current state of the vehicle, so that the start and stop of the engine are effectively controlled, the problem that the engine of the dual-motor hybrid vehicle is difficult to start and stop under different working conditions is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
Optionally, the determining the working motor corresponding to the engine operating mode includes:
determining a preferred motor and an alternative motor corresponding to the engine operation mode according to a preset mode motor corresponding table;
acquiring a motor state of the preferred motor, and determining the preferred motor as a working motor when the motor state is normal; if not, then,
determining the alternative motor to be the working motor.
Optionally, the apparatus further comprises:
and when the motor state of the preferred motor is abnormal, determining the motor abnormal grade and giving an alarm.
Optionally, the operation precondition includes a vehicle speed condition, a vehicle gear condition, a battery allowable power condition, a battery electric quantity condition, a vehicle start-stop key trigger condition, an air conditioner switch condition, a brake vacuum degree condition and/or an engine water temperature condition.
Optionally, the operation state change signal includes an engine start signal, an engine stop signal and an engine power generation signal;
correspondingly, the determining the engine operation mode according to the operation state change signal comprises the following steps:
determining that the engine start-stop mode is a stop-start mode if the operation state change signal is the engine start signal;
determining that the engine start-stop mode is a stop-stop mode if the operating state change signal is the engine stop signal;
and if the running state change signal is the engine power generation signal, determining that the engine start-stop mode is a stop power generation mode.
Optionally, the apparatus further comprises:
when the running state change signal is the engine starting signal, acquiring a starting count value;
and if the starting count value is a preset first starting value, determining that the engine operation mode is a first starting mode.
Optionally, the controlling the engine operation by the working motor includes:
when the engine start-stop mode is the stop start mode or the first start mode, controlling the engine to start through the working motor;
when the engine start-stop mode is the stop-stop mode, controlling the engine to stop by the working motor;
and when the engine start-stop mode is the stop power generation mode, controlling the engine to charge a battery through the working motor.
The technical scheme of the embodiment includes that different running state change signals are divided into a plurality of different signal types in advance, when the running state change signals are monitored, corresponding engine running modes are determined according to the signal types of the running state change signals, whether an engine is started for the first time within a certain time is judged when the running state change signals are engine starting signals, the engine running modes are further subdivided, after the engine running modes are determined, the current state of a multi-dimensional vehicle is judged, whether running precondition conditions corresponding to the engine running modes are met is detected, when the current state of the vehicle meets the running precondition conditions corresponding to the engine running modes, a first motor and an alternative motor corresponding to the engine running modes are determined according to a preset mode motor corresponding table, and the motor state of the first motor is detected, and determining a working motor corresponding to the engine operation mode, determining the alternative motor as the working motor when the motor state of the preferred motor is abnormal, and controlling the engine to operate according to the engine operation mode through the working motor. According to the invention, through the acquired running state change signal and the actual acquisition of the current state of the vehicle, the motor which is most suitable for working at the current moment is selected from the two motors of the double-motor vehicle according to different conditions, and when one motor fails or has insufficient torque capacity, the other motor can be switched to work immediately, so that the start and stop of the engine are effectively controlled, the problem that the start and stop of the engine are difficult in different working conditions of the double-motor hybrid vehicle is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
EXAMPLE III
Fig. 4 is a block diagram of a vehicle according to a third embodiment of the present invention, as shown in fig. 4, the vehicle includes a processor 410, a memory 420, two motors 430, and an engine 440; the number of processors 410 in the vehicle may be one or more, and one processor 410 is taken as an example in fig. 4; the processor 410, memory 420, input device 430, and output device 440 in the vehicle may be connected by a bus or other means, as exemplified by the bus connection in fig. 4.
The memory 420 serves as a computer-readable storage medium that may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the dual-motor vehicle engine control method in embodiments of the present invention (e.g., the operating mode determination module 310, the operating motor determination module 320, and the engine operation module 330 in the dual-motor vehicle engine control device). The processor 410 executes various functional applications and data processing of the vehicle by executing software programs, instructions and modules stored in the memory 420, that is, implements the dual-motor vehicle engine control method described above.
The memory 420 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 420 may further include memory located remotely from the processor 410, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The processor 410 may operate the engine 440 by controlling the electric machine 430.
Example four
A fourth embodiment of the present invention also provides a storage medium containing computer-executable instructions which, when executed by a computer processor, perform a dual-motor vehicle engine control method, the method comprising:
when the running state change signal is monitored, determining an engine running mode according to the running state change signal;
when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, determining a working motor corresponding to the engine operation mode;
and controlling the engine to operate through the working motor.
According to the technical scheme of the embodiment, the engine operation mode is determined according to the operation state change signal when the operation state change signal is monitored, the working motor corresponding to the engine operation mode is determined when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, and the operation of the engine is controlled through the working motor. According to the invention, the motor which is most suitable for working at the current moment is selected according to the conditions by acquiring the running state change signal and actually acquiring the current state of the vehicle, so that the start and stop of the engine are effectively controlled, the problem that the engine of the dual-motor hybrid vehicle is difficult to start and stop under different working conditions is solved, the effect of accurately controlling the start and stop of the engine is realized, and the driving performance, the comfort and the economy of the vehicle are improved.
Of course, the embodiments of the present invention provide a storage medium containing computer-executable instructions, which are not limited to the operations of the method described above, but can also perform related operations in the dual-motor vehicle engine control method provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the dual-motor vehicle engine control device, the included units and modules are only divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A dual motor vehicle engine control method, comprising:
when the running state change signal is monitored, determining an engine running mode according to the running state change signal;
when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode, determining a working motor corresponding to the engine operation mode;
controlling the operation of an engine through the working motor;
wherein, the determining the working motor corresponding to the engine operation mode comprises:
determining a preferred motor and an alternative motor corresponding to the engine operation mode according to a preset mode motor corresponding table;
acquiring a motor state of the preferred motor, and determining the preferred motor as a working motor when the motor state is normal; if not, then,
determining the alternative motor to be the working motor.
2. The method of claim 1, further comprising:
and when the motor state of the preferred motor is abnormal, determining the motor abnormal grade and giving an alarm.
3. The method of claim 1, wherein the operational precondition comprises a vehicle speed condition, a vehicle gear condition, a battery power allowed condition, a battery charge condition, a vehicle start-stop key trigger condition, an air conditioner switch condition, a brake vacuum condition, and/or an engine water temperature condition.
4. The method of claim 1, wherein the operating state change signals include an engine start signal, an engine stop signal, and an engine power generation signal;
correspondingly, the determining the engine operation mode according to the operation state change signal comprises the following steps:
determining that the engine start-stop mode is a stop-start mode if the operation state change signal is the engine start signal;
determining that the engine start-stop mode is a stop-stop mode if the operating state change signal is the engine stop signal;
and if the running state change signal is the engine power generation signal, determining that the engine start-stop mode is a stop power generation mode.
5. The method of claim 4, further comprising:
when the running state change signal is the engine starting signal, acquiring a starting count value;
and if the starting count value is a preset first starting value, determining that the engine operation mode is a first starting mode.
6. The method of claim 5, wherein said controlling engine operation by said working electric machine comprises:
when the engine start-stop mode is the stop start mode or the first start mode, controlling the engine to start through the working motor;
when the engine start-stop mode is the stop-stop mode, controlling the engine to stop by the working motor;
and when the engine start-stop mode is the stop power generation mode, controlling the engine to charge a battery through the working motor.
7. A dual motor vehicle engine control apparatus, characterized by comprising:
the operation mode determining module is used for determining an engine operation mode according to the operation state change signal when the operation state change signal is monitored;
the working motor determining module is used for determining a working motor corresponding to the engine operation mode when the current state of the vehicle meets the operation precondition corresponding to the engine operation mode;
wherein, the determining the working motor corresponding to the engine operation mode comprises: determining a preferred motor and an alternative motor corresponding to the engine operation mode according to a preset mode motor corresponding table; acquiring a motor state of the preferred motor, and determining the preferred motor as a working motor when the motor state is normal; otherwise, determining the alternative motor as the working motor;
and the engine operation module is used for controlling the operation of the engine through the working motor.
8. A vehicle, characterized in that the vehicle comprises:
one or more processors;
a memory for storing one or more programs;
two motors;
an engine;
when executed by the one or more processors, cause the one or more processors to implement a two-motor vehicle engine control method as recited in any of claims 1-6.
9. A storage medium containing computer executable instructions for performing the two-motor vehicle engine control method of any one of claims 1-6 when executed by a computer processor.
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