CN115214605B

CN115214605B - Control method and system for series hybrid vehicle, vehicle and storage medium

Info

Publication number: CN115214605B
Application number: CN202211147117.3A
Authority: CN
Inventors: 董伟民; 张岩; 秦淼
Original assignee: Lingong Heavy Machinery Co Ltd
Current assignee: Lingong Heavy Machinery Co Ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-02-10
Anticipated expiration: 2042-09-21
Also published as: CN115214605A

Abstract

The invention discloses a control method and a control system for a series hybrid vehicle, the vehicle and a storage medium. The method is applied to a vehicle with an engine and a generator coupled integration and an engine and a gearbox decoupled, and comprises the following steps: matching an energy management strategy according to the current working condition to obtain a target energy management strategy, wherein the energy management strategy is used for stipulating the output energy of a vehicle power module, the vehicle power module comprises an integrated power system serving as a main power source and a battery system serving as a power compensation unit and an energy recovery unit, and the integrated power system comprises an engine and a generator; and generating a control instruction according to the target energy management strategy, and outputting the control instruction to the vehicle power module so as to enable the output energy of the vehicle power module to accord with the target energy management strategy. By the embodiment of the invention, the problems of reliability and oil consumption of parts of the mining vehicle can be solved, the fault rate of the engine is reduced, and the oil saving rate is improved.

Description

Control method and system for series hybrid vehicle, vehicle and storage medium

Technical Field

The invention relates to the field of transportation devices, in particular to a control method and system of a series hybrid vehicle, the vehicle and a storage medium.

Background

Along with the improvement of production level, the domestic mining begins to be comprehensively upgraded, a transportation scheme taking large tonnage and electromotion as key points is created, more than 80% of domestic mines are under heavy-load climbing conditions, a transportation mode of a non-road pure electric wide-body mine car is mostly adopted, the weight coefficient of the whole existing wide-body mine car is high, the weight of the car body is light, the service life of the whole car is moderate, and the price and the use and maintenance cost are low. The method has wide universality and applicability in the aspects of technical performance, use function, application range, user group, purchasing, use, maintenance and the like of products.

In the process of implementing the invention, the inventor finds that the prior art has the following defects: more than 80% of domestic mines are the heavy load climbing operating mode, and the electric quantity that non-road pure electric wide body mine car climbs the slope in-process and consumes is great, needs frequent parking to charge, has caused the very big loss of manpower and materials, influences the conveying efficiency, and the reduction of the rate of attendance has influenced the output of mining simultaneously. If the diesel vehicle is adopted for transportation, although frequent parking and charging can be avoided, the problems of overhigh failure rate of the engine and high oil consumption exist. Therefore, how to solve the problems of reliability and oil consumption of parts of the vehicle on the basis of meeting the mining yield and the transportation efficiency is a great problem in the mining industry.

Disclosure of Invention

The invention provides a control method and a control system of a series hybrid vehicle, a vehicle and a storage medium, and solves the problems of reliability and oil consumption of parts of a mining vehicle.

According to an aspect of the present invention, there is provided a control method of a series hybrid vehicle, the method including:

vehicle applied to coupling integration of an engine and a generator, wherein the engine is decoupled with a gearbox, comprising:

matching an energy management strategy according to the current working condition to obtain a target energy management strategy, wherein the energy management strategy is used for regulating the output energy of a vehicle power module, the vehicle power module comprises an integrated power system serving as a main power source and a battery system serving as a power compensation unit and an energy recovery unit, and the integrated power system comprises the engine and the generator;

and generating a control instruction according to the target energy management strategy, and outputting the control instruction to the vehicle power module so as to enable the output energy of the vehicle power module to accord with the target energy management strategy.

In a second aspect, an embodiment of the present invention further provides a control system of a series hybrid vehicle, where the method includes:

the system comprises a vehicle control unit, an integrated power system, a battery system, a driving motor, a gearbox and a distribution box, wherein the integrated power system comprises a coupling integrated engine and a generator, and the engine is decoupled with the gearbox;

the vehicle control unit is in communication connection with the integrated power system, the battery system, the driving motor and the gearbox and is used for executing the control method of the series hybrid vehicle provided by any embodiment of the invention;

the distribution box is electrically connected with the integrated power system, the battery system and the driving motor, and is used for processing a first target power output by the integrated power system and/or a second target power output by the battery system and outputting the processed first target power and/or second target power to the driving motor;

the gearbox is in transmission connection with the driving motor and is used for adjusting the torque output by the driving motor and outputting the adjusted torque to the axle mechanism so as to drive a vehicle through the adjusted output torque.

In a third aspect, embodiments of the present invention further provide a series hybrid vehicle, where the vehicle includes a control system of the series hybrid vehicle provided in any of the embodiments of the present invention.

In a fourth aspect, the present invention provides a computer-readable storage medium, comprising:

the computer readable storage medium stores computer instructions for causing a processor to implement a method of controlling a series hybrid vehicle provided by any of the embodiments of the present invention when executed.

The technical scheme of the embodiment of the invention provides a control method of a series hybrid vehicle, which adopts an engine and a generator with higher power as a main power source, and a power type battery with lower electric quantity as a power compensation and energy recovery unit, thereby reducing the secondary conversion process of the electric quantity of an extended range system. By decoupling the engine and the gearbox, the engine fault caused by the reverse support of the engine is avoided, and the fault rate of the engine is reduced. The target energy management strategy is obtained by matching the current working condition with the energy management strategy, and the control instruction is generated according to the target energy management strategy, so that the effects of adjusting the output energy of the integrated power system and the battery system based on the actual working condition, saving the oil consumption to the maximum extent in the actual operation, realizing the maximum oil saving rate, solving the problems of the mining vehicle in the aspects of the reliability and the oil consumption of parts and saving the cost are achieved.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1a is a flow chart of a series hybrid vehicle control method according to an embodiment of the present invention; FIG. 1b is a scene diagram of a specific application scenario to which the embodiment of the present invention is applied

FIG. 2 is a flowchart of a control system for a series hybrid vehicle according to a second embodiment of the present invention;

FIG. 3 is a schematic illustration of a series hybrid vehicle according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device 10 that can be used to implement the embodiment of the present invention according to the fourth embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example one

Fig. 1a is a flowchart of a control method for a tandem hybrid vehicle according to an embodiment of the present invention, which is applicable to a situation where a fuel saving rate of a vehicle is increased during a mine operation mainly under an uphill loading condition, and the method can be executed by a control system of the tandem hybrid vehicle, which can be implemented in hardware and/or software, and can be configured in the tandem hybrid vehicle.

As shown in fig. 1a, the method comprises:

and S110, matching the energy management strategy according to the current working condition to obtain a target energy management strategy.

The series hybrid vehicle works according to the working principle that the engine drives the generator to generate electricity, the electric energy of the generator is directly transmitted to the driving motor through the inverter controller in the distribution box, and the driving motor generates driving torque to drive the vehicle. Therefore, the series hybrid vehicle is characterized in that the engine does not directly participate in driving, the engine only takes charge of driving the generator to generate electricity, and the generator outputs driving power to the driving motor. The engine can thus be operated at any point in the engine's universal characteristic, and the fuel consumption of the engine can be controlled by the vehicle drive power demand.

In an embodiment of the invention, the energy management strategy is used to specify the output energy of a vehicle power module. Specifically, working strategies of the integrated power system and the battery system under different working conditions are configured in advance, an energy management strategy is generated, and the energy management strategy is configured to a vehicle control unit. Wherein the current operating conditions include: the system comprises a heavy-load uphill working condition, a no-load uphill working condition, a heavy-load level road working condition, a no-load level road working condition, a heavy-load downhill working condition, a no-load downhill working condition, an unloading working condition and a loading working condition. The energy management strategy comprises a power constant strategy of the integrated power system and/or a power following strategy of the battery system, a power following strategy of the integrated power system, a power following strategy of the battery system and the like.

Wherein the vehicle power module includes an integrated power system as a primary power source, and a battery system as a power compensation unit and an energy recovery unit, the integrated power system including the engine and the generator. Specifically, an engine and a generator with larger power can be selected as a main power source, and a power type battery with smaller electric quantity can be selected as a power compensation unit and an energy recovery unit.

When in a heavy load uphill condition or an idle uphill condition, the energy management strategy comprises:

the integrated power system outputs constant power, the battery system outputs first following power, and the first following power is determined based on a difference value between traction power and the constant power, wherein the constant power is located in a system efficiency high-efficiency area, and the system efficiency high-efficiency area is determined based on a universal characteristic curve of a matched engine and a motor efficiency map.

The system efficiency high-efficiency area is an optimal working area obtained by integrating a low-specific-oil-consumption area of the engine and a high-power-generation efficiency area of the generator. Specifically, the overlap region between the specific fuel consumption economic region of the engine and the power generation efficiency economic region of the generator may be regarded as the system efficiency efficient region.

The specific fuel consumption economic area of the engine can be determined through the universal characteristic curve of the engine. The characteristic curves are also called MAP.

The left-side ordinate represents the output torque of the engine, and the right-side ordinate represents the cylinder pressure; the abscissa represents the engine speed; wherein the solid circles indicate the specific fuel consumption and the dashed lines indicate the power. The most economical operating region of the engine can be determined using the engine MAP. For example, fuel consumption is represented by a set of solid circles in the MAP of the engine, and the smaller the circle, the lower the fuel consumption. Therefore, starting from the smallest solid coil, the rotation speed corresponding to one or more solid coils in the MAP of the engine is selected from small and large as the most economical operating region of the engine.

The economic region of the generator's generating efficiency may be determined by a generator efficiency MAP (also referred to as a generator MAP).

The abscissa of the MAP of the generator represents the generator speed, and the ordinate represents the generator output torque. The solid circles in the figure represent the power generation efficiency. The most economical operating region of the generator can be determined using the generator MAP. For example, the power generation efficiency in the MAP of the generator is represented by a solid circle one by one, and the smaller the circle, the higher the power generation efficiency. Therefore, starting from the smallest solid coil, the rotation speed corresponding to one or more solid coils in the MAP of the small and large selective generator MAP is used as the most economical working area of the generator.

Further, an engine MAP graph and a generator MAP graph are fused by adopting the same rotating speed abscissa and torque ordinate to obtain a system MAP graph. The system efficiency MAP region may satisfy the most economical operating region for both the engine and the generator. For example, the integrated power system operates in a system efficiency region with the lowest specific fuel consumption of the engine and the highest efficiency of the motor. The constant power is the output power of the integrated power system obtained based on the system efficiency efficient area in the traction power inquiry system MAP graph.

Under a heavy load flat road working condition or an idle flat road working condition, the energy management strategy comprises the following steps:

determining battery charging power according to the current road condition and the battery charge state in the battery system, and charging the battery by adopting the integrated power system according to the battery charging power;

determining an output power of the integrated power system based on a difference between a traction power and the battery charging power.

The current road condition represents a running road condition such as a running road surface condition of the series hybrid vehicle and a distance to a destination. For example, the current road conditions include road surface flatness, road surface bumpiness, road surface gradient, distance from a destination, and the like.

The State of Charge (SOC) is a physical quantity reflecting the State of remaining capacity of the battery, and its value is defined as the ratio of the remaining capacity of the battery to the capacity of the battery.

Specifically, the vehicle control unit is preconfigured with the battery state of charge, the road condition and the corresponding relationship between the battery charging power, so that the battery charging power can be queried according to the current road condition and the battery state of charge. The charging power of the battery is affected by different road conditions or the change of the state of charge of the battery, so that the integrated power system outputs the changed output power, and the output power is determined based on the difference value of the traction power and the charging power of the battery.

Further, when the working condition of heavy load downhill or no-load downhill is heavy, the energy management strategy comprises:

the output power of the battery system is determined based on the traction power, and an engine in the integrated power system stops working;

and determining the charging power of the battery according to the current road condition and the charge state of the battery in the battery system, and charging the battery according to the charging power of the battery by using the electric quantity fed back by retarding and electric braking.

When the working condition of heavy load downhill or no-load downhill is carried out, due to the inertia effect, the traction power required by the series hybrid vehicle is smaller, the battery system can provide energy, and at the moment, the engine can be completely flamed out, namely, the engine in the integrated power system does not work, so that the fuel consumption is saved. During the slowing or braking process of the series hybrid vehicle on the downhill, energy conversion occurs, the energy form is converted from gravitational potential energy into mechanical energy, the mechanical energy is converted into electric energy, and the electric energy is charged into a battery through a distribution box by a generator. The battery charging power is also determined based on the current road condition and the battery state of charge, which is not described herein again.

Further, in the unloading working condition or the loading working condition, the energy management strategy comprises the following steps:

and the engine in the integrated power system stops working, and second follow power meeting the power requirement of the vehicle is output through the battery system.

When the vehicle is in the unloading working condition or the loading working condition, the vehicle stops, traction power is not needed, energy is only needed to be provided for lifting of a container and entertainment equipment or air conditioning equipment in the vehicle, the energy can be provided by a battery system, at the moment, the engine can be completely shut off, namely, the engine does not work in the integrated power system, and therefore fuel consumption is saved.

For the unloading working condition and the loading working condition, the vehicle is in a static state, so that the traction force is zero under the two disclosures, the traction force is not zero under the other working conditions, and the traction force is related to factors such as load, road surface leveling degree and the like.

Illustratively, the obtaining of the target energy management strategy by matching the energy management strategy according to the current working condition includes: under the condition that the traction force is not zero, judging that the current working condition is a heavy-load uphill working condition, a no-load uphill working condition, a heavy-load flat road working condition, a no-load flat road working condition, a heavy-load downhill working condition or a no-load downhill working condition according to the traction force; under the condition that the traction force is zero, judging that the current working condition is an unloading working condition or a loading working condition according to the lifting force of the container; and obtaining a target energy management strategy according to the corresponding relation between the current working condition matching working condition and the energy management strategy.

And S120, generating a control command according to the target energy management strategy, and outputting the control command to the vehicle power module.

Wherein the generating a control command according to the target energy management strategy and outputting the control command to the vehicle power module comprises: determining the rotating speed of an engine according to the output power of the integrated power system in the target energy management strategy; generating a rotating speed control instruction according to the rotating speed, outputting the rotating speed control instruction to an engine, and driving a generator to output first target power to a distribution box through the engine; generating a battery control command according to the output power of the battery system in the target energy management strategy, and outputting the battery control command to a battery management system so as to control the battery management system to output a second target power to the distribution box; outputting the first target power and/or the second target power to a driving motor through the distribution box.

After the control command is output to the vehicle power module so that the output energy of the vehicle power module conforms to the target energy management strategy, the method further comprises the following steps: acquiring a first speed feedback signal returned by an engine controller; acquiring a first power feedback signal returned by an engine controller;

acquiring a second power feedback signal returned by the battery system; acquiring a second rotating speed feedback signal returned by the driving motor controller; acquiring a third rotating speed feedback signal returned by the gearbox controller; and determining whether the vehicle works in a working mode corresponding to the target energy management strategy or not according to the first power feedback signal, the second power feedback signal, the first rotating speed feedback signal, the second rotating speed feedback signal and the third rotating speed feedback signal.

Application specific scenarios

Fig. 1b is a scene schematic diagram of a specific application scene to which the first embodiment of the present invention is applied, and fig. 1b shows a section of simulation of working conditions in an example practical application, where a working condition of a road section 1 is a loading area working condition, a road section 2 is a heavy-load uphill working condition, a road section 3 is a heavy-load level road working condition, and a road section 4 is a heavy-load downhill working condition. And the section 5 is the working condition of the discharging area. And the road section 6 is under the no-load uphill working condition. The road section 7 is an idle-load level road working condition, and the road section 8 is an idle-load downhill working condition.

And when the vehicle control unit determines that the current working condition is the road section 1, controlling an engine in the integrated power system to stop working, and controlling a battery to supply power for a vehicle-mounted air conditioner or vehicle-mounted entertainment equipment and the like. The output power of the battery is the following power X which changes along with the power demand. The battery system outputs a driving current corresponding to the power X to the power distribution box, and the driving current is processed by the power distribution box and then output to the driving motor.

When the vehicle control unit determines that the current working condition is the road section 2, the integrated power system is controlled to work in the highest system efficiency area, so that the oil consumption of the engine is in the optimal oil consumption area, and the power generation efficiency of the generator is in the optimal power generation area. At this time, the integrated power system outputs a driving current corresponding to the constant power a. And the vehicle control unit outputs a BATTERY control signal corresponding to the BATTERY following power Y to a BATTERY MANAGEMENT SYSTEM (BMS) according to the traction power required by the heavy-load uphill working condition and the BATTERY following power Y of the constant power A. And controlling the battery system to output a driving current according to the battery following power Y based on the battery control signal through the BMS. The two driving currents are processed by the distribution box and then output to the driving motor.

When the vehicle control unit determines that the current working condition is the road section 3, the integrated power system is controlled to determine the output power B of the integrated power system according to the traction power required by the driving road condition under the heavy-load flat road working condition and the battery charging power, and the vehicle control system controls the integrated power system to output the driving current with corresponding power to the distribution box according to the output power B and outputs the driving current to the driving motor after being processed by the distribution box. In addition, the vehicle control unit also controls the integrated power system to charge the battery according to the battery charging power.

When the vehicle control unit determines that the current working condition is the road section 4, the engine in the integrated power system is controlled to stop working, and in the processes of speed slowing and electric braking, the gravitational potential energy is converted into mechanical energy and then converted into electric energy to charge the battery. In addition, the whole vehicle control system determines battery following power Z according to the traction power, outputs a battery control signal corresponding to the battery following power Z to the BMS, controls the battery system to output driving current corresponding to the battery following power to the power distribution box through the BMS based on the battery control signal, and outputs the driving current to the driving motor after being processed by the power distribution box.

When the vehicle control unit determines that the current working condition is the road section 5, the engine in the integrated power system is controlled to stop working, the battery following power W is determined according to the lifting power, a battery control signal corresponding to the battery following power W is output to the BMS, the BMS controls the battery system to output the driving current corresponding to the battery following power to the distribution box based on the battery control signal, and the driving current is output to the carriage lifting mechanism after being processed by the distribution box.

When the vehicle control unit determines that the current working condition is the road section 6, the integrated power system is controlled to work in the optimal oil consumption area and the optimal power generation area, the integrated power system is enabled to output the driving current corresponding to the constant power C, the vehicle control unit can actually follow the battery power of the battery system according to the traction power and the constant power C required by the heavy-load uphill working condition, outputs a battery control signal corresponding to the battery follow power, and controls the battery system to output the driving current according to the battery follow power through the battery control signal. The two driving currents are processed by the distribution box and then output to the main driving motor.

When the current working condition is determined to be the road section 7, the integrated power system determines the output power D of the integrated power system according to the traction power required by the no-load flat road working condition and the battery charging power, and the whole vehicle control system controls the integrated power system to output the driving current with the corresponding power to the power distribution box according to the output power D, and the driving current is output to the main driving motor after being processed by the power distribution box.

When the current working condition is determined to be the road section 8, the engine in the integrated power system stops working, potential energy is converted into mechanical energy and then converted into electric energy to charge the battery in the processes of retarding, electric braking and electric braking, the whole vehicle control system determines the battery following power according to the traction power, outputs a battery control signal corresponding to the battery following power, and controls the battery system to output the battery following power through the signal.

The constant power is located in a system efficiency high-efficiency area, and the system efficiency high-efficiency area is determined based on the matching engine universal characteristic curve and the motor efficiency map.

It should be noted that, in the actual transportation operation working conditions, not all of the above eight working conditions are necessarily included, and only some of the eight working conditions may be included.

Through the arrangement, the fuel can be saved to the maximum extent in actual operation, the effect of the maximum fuel saving rate is realized, the problem of large energy loss of the hybrid vehicle under different working conditions is solved, and the cost is saved.

According to the embodiment of the invention, the engine and the generator with larger power are used as the main power source, the power type battery with smaller electric quantity is used as the power compensation and energy recovery unit, and the secondary conversion process of the electric quantity of the extended-range system is reduced. By decoupling the engine and the gearbox, the engine fault caused by reverse support of the engine is avoided, and the fault rate of the engine is reduced. The target energy management strategy is obtained by matching the current working condition with the energy management strategy, and the control instruction is generated according to the target energy management strategy, so that the effects of adjusting the output energy of the integrated power system and the battery system based on the actual working condition, saving the oil consumption to the maximum extent in the actual operation, realizing the maximum oil saving rate, solving the problems of the mining vehicle in the aspects of the reliability and the oil consumption of parts and saving the cost are achieved.

Example two

Fig. 2 is a control system of a series hybrid vehicle according to a second embodiment of the present invention, where the control system provided in this embodiment may be used to execute the control method of the series hybrid vehicle described in the foregoing embodiments. As shown in fig. 2, the system includes:

vehicle control unit 210, integrated power system 220, battery system 230, driving motor 240, gearbox 250 and distribution box 260.

Wherein the integrated powertrain 220 includes a coupled integrated engine and generator, the engine being decoupled from the transmission.

Further, the engine and the gearbox are decoupled into an engine power part and a gearbox for decoupling. In the prior art, an engine and a motor are mostly coupled for operation, namely, the engine is connected with a gearbox through a rotating shaft, the gearbox and an engine top cylinder are connected, and the engine is easily damaged due to the reverse support of the engine. According to the decoupling type series hybrid scheme applied by the invention, the engine and the generator are integrated in a coupling mode, and the flywheel of the engine is reused as the rotor of the generator, so that the engine drives the generator to generate electricity, the generator outputs driving power to the driving motor, the transmission power of the transmission shaft and the pressure of the engine are eliminated, and the problem of overhigh failure rate of the engine is further reduced.

The vehicle controller 210 is communicatively connected to the integrated power system 220, the battery system 230, the driving motor 240 and the transmission 250, and is configured to execute a method for controlling a series hybrid vehicle according to any embodiment of the present invention.

Further, after the vehicle controller 210 outputs the control command to the integrated electric power system 220, the battery system 230, the driving motor 240 and the transmission 250 to make the output energy of the vehicle power module meet the target management strategy, the method further includes:

acquiring a first speed feedback signal returned by the integrated power system 220; wherein, the first rotating speed feedback signal feedback information type is a signal containing rotating speed information of the integrated power system 220;

acquiring a first power feedback signal returned by an engine controller; wherein the first power feedback signal feedback information type is a signal containing power information of an engine controller;

acquiring a second power feedback signal returned by the battery system 230; wherein the second power feedback signal feedback information type is a signal containing power information of the battery system 230;

acquiring a second rotating speed feedback signal returned by the driving motor controller; wherein the feedback information type of the second rotating speed feedback signal is a signal containing torque information of the driving motor 240;

acquiring a third rotating speed feedback signal returned by the gearbox controller; wherein, the third rotating speed feedback signal feedback information type is a signal containing the rotating speed information of the gearbox 250.

And determining whether the vehicle works in a working mode corresponding to the target energy management strategy or not according to the first power feedback signal, the second power feedback signal, the first rotating speed feedback signal, the second rotating speed feedback signal and the third rotating speed feedback signal.

Through the exchange of information before each system, whether the vehicle works in a working mode corresponding to the target energy management strategy is determined, the error rate of the system is reduced, the normal operation of the system and the commuting rate of the vehicle are guaranteed, and the mining capacity of the mine is improved.

Further, as shown in fig. 2, the dashed line represents a low-voltage signal circuit, which is an information exchange path between the vehicle controller 210 and the integrated power system 220, the battery system 230, and the driving motor 240.

The distribution box 260 is electrically connected to the integrated power system 220, the battery system 230 and the driving motor 240, and is configured to process the first target power output by the integrated power system 220 and/or the second target power output by the battery system, and output the processed first target power and/or the processed second target power to the driving motor.

As shown in fig. 2, the solid line represents a high voltage circuit, which is an information exchange path of the distribution box 260 with the integrated power system 220, the battery system 230, and the driving motor 240.

The gearbox 250 is in transmission connection with the driving motor 240, and is configured to adjust the torque output by the driving motor 240 and output the adjusted torque to an axle mechanism, so as to drive the vehicle by the adjusted output torque.

According to the technical scheme of the embodiment of the invention, the engine and the generator with higher power are used as the main power source, the power type battery with lower electric quantity is used as the power compensation and energy recovery unit, and the secondary conversion process of the electric quantity of the extended-range system is reduced. By decoupling the engine and the gearbox, the engine fault caused by reverse support of the engine is avoided, and the fault rate of the engine is reduced. The target energy management strategy is obtained by matching the current working condition with the energy management strategy, and the control command is generated according to the target energy management strategy, so that the effects of adjusting the output energy of the integrated power system and the battery system based on the actual working condition, saving oil consumption to the maximum extent in actual operation, realizing the maximum oil saving rate, solving the problems of the mining vehicle in the aspects of part reliability and oil consumption and saving the cost are achieved.

EXAMPLE III

The invention also provides a series hybrid vehicle. Fig. 3 is a schematic frame diagram of a tandem hybrid vehicle according to an embodiment of the present invention. As shown in fig. 3, the series hybrid vehicle includes a control system of the series hybrid vehicle according to any one of the embodiments of the present invention (the control system of the series hybrid vehicle includes a vehicle controller 210, an integrated power system 220, a battery system 230, a driving motor 240, a transmission case 250, and a distribution box 260). The series hybrid vehicle further includes a charging port 310, the charging port 310 is electrically connected to a distribution box, the battery is charged through the charging port 310, and a charging current is processed by the distribution box and then output to the battery. In addition, the charging port is also communicatively connected to the BMS for transmitting charging feedback information to the BMS. In addition, the tandem hybrid vehicle further includes an axle mechanism 320, the axle mechanism 320 is connected to the vehicle body, and wheels are mounted at two ends of the axle mechanism 320.

Example four

In some embodiments, the series hybrid vehicle control method may be implemented as a computer program tangibly embodied on a computer readable storage medium.

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

Computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs may be provided to the hybrid vehicle control unit such that the computer programs, when executed by the hybrid vehicle control unit, cause the functions/operations specified in the flowcharts and/or block diagrams to be carried out.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described herein may be implemented on a vehicle having: a display device (e.g., a touch-sensitive display screen) for displaying information to a user; the user may provide input to the vehicle by way of a touch screen display or voice, etc. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a series hybrid vehicle, wherein a flywheel applied to an engine is multiplexed as a rotor of a generator, and the engine is decoupled from a transmission, comprising:

generating a control instruction according to the target energy management strategy, and outputting the control instruction to the vehicle power module so as to enable the output energy of the vehicle power module to accord with the target energy management strategy;

wherein, under a heavy load flat road working condition or an empty load flat road working condition, the energy management strategy comprises the following steps: inquiring the battery charging power according to the current road condition and the battery charging state in the battery system based on the corresponding relation between the pre-configured battery charging state, the road condition and the battery charging power, and charging the battery by adopting the integrated power system according to the battery charging power, wherein the battery charging power is influenced by different road conditions or the change of the battery charging state;

determining the output power of the integrated power system based on the traction power and the battery charging power required by the driving road condition;

when the heavy-load uphill working condition or the no-load uphill working condition is adopted, the energy management strategy comprises the following steps:

the integrated power system outputs constant power, the battery system outputs first follow power, the first follow power is determined based on a difference value between traction power and the constant power, the constant power is located in a system efficiency high-efficiency area, the system efficiency high-efficiency area is determined based on matching of an engine universal characteristic curve and a motor efficiency diagram, and the system efficiency high-efficiency area is an overlapping area of a specific fuel consumption economic area of the engine and a power generation efficiency economic area of the generator.

2. The method of claim 1, wherein the energy management strategy comprises, during heavy or empty downhill operation:

and determining the charging power of the battery according to the current road condition and the charge state of the battery in the battery system, and charging the battery according to the charging power of the battery by adopting the electric quantity fed back by retarding and electric braking.

3. The method of claim 1, wherein the energy management strategy comprises, at a discharge condition or a charge condition:

4. The method of claim 1, wherein the matching the energy management strategy according to the current operating conditions to obtain a target energy management strategy comprises:

under the condition that the traction force is not zero, judging that the current working condition is a heavy-load uphill working condition, a no-load uphill working condition, a heavy-load flat road working condition, a no-load flat road working condition, a heavy-load downhill working condition or a no-load downhill working condition according to the traction force;

under the condition that the traction force is zero, judging that the current working condition is an unloading working condition or a loading working condition according to the lifting force of the container;

and obtaining a target energy management strategy according to the corresponding relation between the current working condition matching working condition and the energy management strategy.

5. The method of claim 1, wherein the generating a control command in accordance with the target energy management strategy, outputting the control command to the vehicle power module, comprises:

determining the rotating speed of an engine according to the output power of the integrated power system in the target energy management strategy;

generating a rotating speed control instruction according to the rotating speed, outputting the rotating speed control instruction to an engine, and driving a generator to output first target power to a distribution box through the engine;

generating a battery control command according to the output power of the battery system in the target energy management strategy, and outputting the battery control command to a battery management system so as to control the battery management system to output a second target power to the distribution box;

outputting the first target power and/or the second target power to a driving motor through the distribution box.

6. The method of claim 1, further comprising, after outputting the control command to the vehicle power module to cause the output energy of the vehicle power module to comply with the target energy management strategy:

acquiring a first rotating speed feedback signal returned by an engine controller;

acquiring a first power feedback signal returned by an engine controller;

acquiring a second power feedback signal returned by the battery system;

acquiring a second rotating speed feedback signal returned by the driving motor controller;

acquiring a third rotating speed feedback signal returned by the gearbox controller;

7. A control system for a series hybrid vehicle, comprising: the integrated power system comprises a coupled integrated engine and a generator, and the engine is decoupled with the gearbox;

the vehicle control unit is in communication connection with the integrated power system, the battery system, the driving motor and the gearbox and is used for executing the control method of the series hybrid vehicle as claimed in any one of claims 1-6;

the gearbox is in transmission connection with the driving motor and is used for adjusting the torque output by the driving motor and outputting the adjusted torque to the axle mechanism so as to drive the vehicle through the adjusted output torque.

8. A series hybrid vehicle, characterized in that it comprises a control system of a series hybrid vehicle according to claim 7.

9. A computer readable storage medium storing computer instructions for causing a processor to implement the method of controlling a series hybrid vehicle of any one of claims 1-6 when executed.