CN118514673B - Control method and control device, hybrid vehicle and storage medium - Google Patents

Abstract

The invention discloses a control method, a control device, a hybrid vehicle and a nonvolatile computer readable storage medium, which are used in the technical field of vehicle braking. The control method comprises the steps of obtaining the reverse power consumption of the current engine; and under the condition that the current braking energy of the hybrid vehicle accords with the corresponding preset braking condition according to the current chargeable energy of the battery of the hybrid vehicle and the current backward dragging power consumption of the engine, controlling the hybrid vehicle to carry out regenerative braking or regenerative braking and mechanical braking. Therefore, under the condition that the current braking energy of the hybrid vehicle accords with the corresponding preset braking condition, the hybrid vehicle can be controlled to only perform regenerative braking or to perform regenerative braking and mechanical braking together, so that the hybrid vehicle can be prevented from using mechanical braking for a long time, the service life of a brake pad is prolonged, and the driving safety is improved to a certain extent.

Description

Control method and control device, hybrid vehicle and storage medium

Technical Field

The present invention relates to the technical field of vehicle braking, and more specifically, to a control method, a control device, a hybrid vehicle and a non-volatile computer-readable storage medium.

Background Art

At present, the braking methods of hybrid vehicles are divided into regenerative braking and mechanical braking. When the braking method of hybrid vehicles is regenerative braking, the braking energy generated by the hybrid vehicle during braking can be converted into electrical energy and stored in the vehicle's battery, thereby improving energy utilization and reducing the wear of brake calipers and brake pads.

However, the regenerative braking of hybrid vehicles is limited by the battery charging conditions. When the charging capacity of the power battery is limited due to high temperature, low temperature, or excessive SOC, and regenerative braking cannot be used under severe charging conditions, the braking mode of the hybrid vehicle needs to be converted from regenerative braking to mechanical braking, thereby increasing the frequency of use of mechanical braking. Long-term use of mechanical braking will reduce the service life of the brake pads and endanger driving safety.

Therefore, an optimal braking scheme needs to be proposed to most effectively recover energy during regenerative braking or regenerative braking and mechanical braking, and to minimize the wear of brake pads during mechanical braking, so as to reduce driving risks.

Summary of the invention

The embodiments of the present invention provide a control method, a control device, a hybrid vehicle and a non-volatile computer-readable storage medium that can increase the frequency of use of regenerative braking, thereby solving the problem that hybrid vehicles do not use regenerative braking under harsh charging conditions, and that long-term use of mechanical braking leads to a reduction in the service life of vehicle brake pads and endangers driving safety.

A control method according to an embodiment of the present invention is used for a hybrid vehicle. The control method includes obtaining the current reverse power consumption of the engine; and when it is determined that the current braking energy of the hybrid vehicle meets the corresponding preset braking condition according to the current battery chargeable energy of the hybrid vehicle and the current reverse power consumption of the engine, controlling the hybrid vehicle to perform regenerative braking or regenerative braking and mechanical braking.

In this way, by using the rechargeable energy of the hybrid vehicle's battery, it is possible to determine that the current braking energy of the hybrid vehicle meets the corresponding preset braking conditions. The hybrid vehicle can be controlled to perform only regenerative braking, or regenerative braking and mechanical braking together, thereby avoiding the hybrid vehicle from using mechanical brakes for a long time, thereby increasing the service life of mechanical brakes and improving driving safety to a certain extent.

In certain embodiments, when it is determined that the current braking energy of the hybrid vehicle meets the corresponding preset braking conditions based on the current battery rechargeable energy of the hybrid vehicle and the current reverse drag power consumption of the engine, the method includes controlling the hybrid vehicle to perform regenerative braking under the condition that the current braking energy is less than or equal to the battery rechargeable energy of the hybrid vehicle; controlling the hybrid vehicle to perform regenerative braking under the condition that the current braking energy is greater than the battery rechargeable energy of the hybrid vehicle and less than or equal to the sum of the battery rechargeable energy of the hybrid vehicle and the maximum current reverse drag power consumption of the engine; and controlling the hybrid vehicle to perform regenerative braking and mechanical braking under the condition that the current braking energy is greater than the sum of the battery rechargeable energy of the hybrid vehicle and the maximum current reverse drag power consumption of the engine.

In this way, by comparing the current braking energy and the rechargeable energy of the hybrid vehicle's battery, it is possible to determine whether the braking energy generated by the hybrid vehicle can be converted into electrical energy by the drive motor and stored in the battery, so that the hybrid vehicle can be braked using regenerative braking, avoiding the long-term use of mechanical braking, and increasing the frequency of use of regenerative braking and driving safety.

In certain embodiments, controlling the hybrid vehicle to perform regenerative braking or regenerative braking and mechanical braking includes controlling the battery of the hybrid vehicle to store a first electrical energy, wherein the first electrical energy is obtained by converting the current braking energy by the drive motor of the hybrid vehicle; controlling the generator of the hybrid vehicle to drive the engine to consume a second electrical energy, wherein the second electrical energy is the remaining electrical energy of the first electrical energy stored in the battery of the hybrid vehicle; and controlling the brake calipers and brake pads of the hybrid vehicle to consume remaining braking energy, wherein the remaining braking energy is the current braking energy remaining after the drive motor of the hybrid vehicle recovers.

In this way, by controlling the drive motor to convert the braking energy of the hybrid vehicle into electrical energy, the utilization rate of resources can be improved. By storing electrical energy in the battery and controlling the generator to drive the engine to consume electrical energy, long-term use of mechanical braking can be avoided, thereby increasing the frequency of use of regenerative braking and driving safety.

In certain embodiments, controlling the generator of the hybrid vehicle to drag the engine to consume a second electric energy, where the second electric energy is the remaining electric energy of the first electric energy stored in the battery of the hybrid vehicle, includes determining the reverse drag power consumption of the engine of the hybrid vehicle based on current state information of the hybrid vehicle; and controlling the generator of the hybrid vehicle to drag the engine to consume the second electric energy based on the current reverse drag power consumption of the engine.

In this way, by obtaining the reverse power consumption of the current engine of the moving vehicle, the braking energy consumed when the generator tows the engine can be accurately obtained, so as to determine whether the battery and the generator tow the engine can consume all the braking energy and avoid the use of mechanical braking.

In certain embodiments, the current reverse towing power consumption of the engine is obtained based on a reverse towing power consumption data table of the engine of the hybrid vehicle, the reverse towing power consumption data table of the engine of the hybrid vehicle is determined by historical status information of the hybrid vehicle, and the reverse towing power consumption data table is configured to be stored in an engine controller or a vehicle controller of the hybrid vehicle.

In this way, by testing the engine of the hybrid vehicle according to the different status information of the hybrid vehicle, the reverse towing power consumption of the engine under different working conditions can be obtained, and multiple reverse towing power consumption data can be plotted into a reverse towing power consumption data table and stored in the engine controller or the vehicle controller, thereby improving the efficiency of calling the reverse towing power consumption of the engine.

In certain embodiments, the status information of the hybrid vehicle includes an ambient temperature of the hybrid vehicle, an engine water temperature of the hybrid vehicle, an engine speed of the hybrid vehicle, a throttle opening of the hybrid vehicle, and a variable valve timing angle of the hybrid vehicle.

In this way, by acquiring the status information of the hybrid vehicle, it is possible to determine whether the current braking energy of the hybrid vehicle meets the corresponding preset braking conditions, thereby determining whether the braking mode of the vehicle is regenerative braking or mechanical braking.

In certain embodiments, the control method further includes determining the acoustic vibration roughness of the hybrid vehicle based on historical status information of the hybrid vehicle; and determining the current status information of the hybrid vehicle when the engine is in reverse when the acoustic vibration roughness is minimum and the reverse power consumption of the current engine of the hybrid vehicle is the same.

In this way, by obtaining the acoustic vibration roughness of the hybrid vehicle, the state information of the hybrid vehicle corresponding to the minimum acoustic vibration roughness can be used when the reverse power consumption of the current engine is the same, thereby reducing noise as much as possible and improving user comfort.

In some embodiments, obtaining the reverse towing power consumption of the current engine includes controlling the engine controller or the vehicle controller of the hybrid vehicle to call the reverse towing power consumption data table according to the current state information of the hybrid vehicle to determine the reverse towing power consumption of the current engine.

In this way, according to the current state information of the hybrid vehicle, the engine controller or the vehicle controller calls the reverse towing power consumption data table, so as to quickly determine the reverse towing power consumption of the current engine of the hybrid vehicle.

The control device of the embodiment of the present invention is used for a hybrid vehicle. The control device includes an acquisition module and a first control module. The acquisition module is used to acquire the current reverse power consumption of the engine; the first control module is used to control the hybrid vehicle to perform regenerative braking or regenerative braking and mechanical braking when it is determined that the current braking energy of the hybrid vehicle meets the corresponding preset braking conditions according to the current state information of the hybrid vehicle and the current reverse power consumption of the engine.

The control device of the embodiment of the present invention includes a processor, a memory; and a computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program includes instructions of the control method described in any one of the above embodiments.

A hybrid vehicle according to an embodiment of the present invention includes the control device described above.

In certain embodiments, the hybrid vehicle includes a vehicle controller, a drive motor, a drive motor controller, a battery, a battery management system, a generator, a generator controller, an engine and an engine controller. The vehicle controller is used to control the flow of braking energy, the drive motor controller is used to control the drive motor to recover braking energy, the battery management system is used to control the battery charging, the generator controller is used to control the generator to drag the engine, and the engine controller is used to control the throttle opening of the engine and the variable valve timing angle of the engine. The vehicle controller is communicatively connected to the drive motor controller, the battery management system, the generator controller and the engine controller respectively.

In this way, by setting up a vehicle controller, a drive motor controller, a battery management system, a generator controller and an engine controller in a hybrid vehicle, the corresponding components can be controlled separately and can communicate with each other, thereby controlling the hybrid vehicle to brake in a timely manner.

The non-volatile computer-readable storage medium containing a computer program according to an embodiment of the present invention enables the processor to execute the control method described in any one of the above embodiments when the computer program is executed by the processor.

Additional aspects and advantages of embodiments of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic diagram of the structure of a hybrid vehicle according to certain embodiments of the present invention;

FIG2 is a schematic diagram of the structure of a hybrid vehicle according to certain embodiments of the present invention;

FIG3 is a schematic flow chart of a control method according to some embodiments of the present invention;

FIG4 is a schematic flow chart of a control method according to some embodiments of the present invention;

FIG5 is a schematic flow chart of a control method according to some embodiments of the present invention;

FIG6 is a schematic flow chart of a control method according to some embodiments of the present invention;

FIG7 is a schematic flow chart of a control method according to some embodiments of the present invention;

FIG8 is a schematic diagram of a module of a control device according to some embodiments of the present invention;

FIG. 9 is a schematic diagram of a connection state between a non-volatile computer-readable storage medium and a processor according to some embodiments of the present invention.

Description of Figure Numbers:

100. Hybrid vehicle; 10. Control device; 11. Acquisition module; 12. First control module; 13. Determination module; 14. Second control module; 15. Processor; 16. Memory; 161. Computer program; 21. Vehicle controller; 22. Drive motor; 23. Drive motor controller; 24. Battery; 25. Battery management system; 26. Generator; 27. Generator controller; 28. Engine; 29. Engine controller; 31. Brake caliper; 32. Brake pad; 33. High-voltage distribution box; 34. Anti-lock braking system; 40. Non-volatile computer-readable storage medium.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are optional and are only used to explain the embodiments of the present invention, and cannot be understood as limiting the embodiments of the present invention.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , a control method according to an embodiment of the present invention is applied to a hybrid vehicle 100 . The control method includes:

Step 011: Obtain the current reverse power consumption of the engine;

Step 012: When it is determined that the current braking energy of the hybrid vehicle 100 meets the corresponding preset braking conditions according to the current battery chargeable energy of the hybrid vehicle 100 and the current reverse power consumption of the engine, the hybrid vehicle 100 is controlled to perform regenerative braking or regenerative braking and mechanical braking.

In this way, by using the status information of the hybrid vehicle 100, it can be determined that the current braking energy of the hybrid vehicle 100 meets the corresponding preset braking conditions. The hybrid vehicle 100 can be controlled to perform only regenerative braking, or regenerative braking and mechanical braking together, thereby avoiding the hybrid vehicle 100 from using mechanical braking for a long time, thereby increasing the service life of the mechanical braking and improving driving safety to a certain extent.

Among them, the hybrid vehicle 100 can be a vehicle that has two power sources to drive it. For example, the hybrid vehicle 100 can be a vehicle that has fuel drive and electric drive to drive it. The braking methods of the hybrid vehicle 100 include regenerative braking and mechanical braking. Regenerative braking means that the drive motor 22 of the hybrid vehicle 100 can convert the braking energy generated by deceleration into electrical energy so that the resources can be recycled; mechanical braking means that the braking energy generated by deceleration of the hybrid vehicle 100 is converted into heat through the brake caliper and brake pad 32 for braking. However, long-term use of mechanical braking will reduce the service life of the brake pad 32 of the hybrid vehicle 100, thereby endangering driving safety.

The vehicle includes a control device 10, which can be used to control the braking of the hybrid vehicle 100. The control device 10 includes a processor 15, a memory 16, and a computer program 161. The computer program 161 is stored in the memory 16 and can be executed by the processor 15. The computer program 161 includes instructions for executing the path planning method.

Specifically, the hybrid vehicle 100 includes a vehicle controller 21, a drive motor 22, a drive motor controller 23, a battery 24, a battery management system 25, a generator 26, a generator controller 27, an engine 28 and an engine controller 29. The vehicle controller 21 is used to control the flow of braking energy, the drive motor controller 23 is used to control the drive motor 22 to recover braking energy, the battery management system 25 is used to control the charging of the battery 24, the generator controller 27 is used to control the generator 26 to drive the engine 28, and the engine controller 29 is used to control the throttle opening of the engine 28 and the variable valve timing angle of the engine 28. The vehicle controller 21 is respectively connected to the drive motor controller 23, the battery management system 25, the generator controller 27 and the engine controller 29, and the engine 28 and the generator 26 are connected mechanically. In some embodiments, the hybrid vehicle 100 also includes a high-voltage distribution box 33 and an anti-lock braking system 34. Among them, the high-voltage distribution box 33 is electrically connected to the battery 24, the drive motor controller 23 and the generator controller 27, the anti-lock braking system 34 is electrically connected to the vehicle controller 21, the high-voltage distribution box 33 can be used to distribute the electric energy generated by the drive motor 22 converting the current braking energy, and the anti-lock braking system 34 can adjust the braking of the hybrid vehicle 100 to prevent the wheels of the hybrid vehicle 100 from locking.

In this way, by providing a vehicle controller 21, a drive motor controller 23, a battery management system 25, a generator controller 27 and an engine controller 29 in the hybrid vehicle 100, the corresponding components can be controlled respectively and can communicate with each other, thereby controlling the hybrid vehicle 100 to brake in time.

Braking energy can be energy converted into heat energy or electrical energy during the braking process of the hybrid vehicle 100. During the deceleration process of the hybrid vehicle 100, the vehicle controller 21 can obtain the current braking energy generated by the braking process of the hybrid vehicle 100 according to the current vehicle speed, accelerator pedal information and brake pedal information of the hybrid vehicle 100. For example, the braking depth can be determined according to the brake pedal information and the accelerator pedal information, and the braking force of the hybrid vehicle 100 can be determined according to the braking depth, and then the current braking energy can be determined according to the product of the braking force and the speed of the hybrid vehicle 100 and the integral of the time. And the vehicle controller 21 communicates with the control device 10, and the processor 15 can obtain the current braking energy of the hybrid vehicle 100. The processor 15 can then determine whether the current braking energy meets the corresponding preset braking conditions according to the battery charging energy of the hybrid vehicle 100.

In this way, by acquiring the battery chargeable energy of the hybrid vehicle 100 and the current reverse power consumption of the engine, it is possible to determine whether the current braking energy of the hybrid vehicle 100 meets the corresponding preset braking conditions, thereby determining whether the vehicle's braking method is regenerative braking or mechanical braking.

The processor 15 can determine the reverse drag power consumption of the engine 28 corresponding to the current state information of the hybrid vehicle in the reverse drag power consumption data table of the engine 28 stored in the hybrid vehicle 100 according to the current state information of the hybrid vehicle. The state information of the hybrid vehicle 100 includes the ambient temperature of the hybrid vehicle 100, the water temperature of the engine 28 of the hybrid vehicle 100, the speed of the engine 28 of the hybrid vehicle 100, the throttle opening of the hybrid vehicle 100, and the variable valve timing angle of the hybrid vehicle 100. Therefore, when the processor 15 determines that the current braking energy of the hybrid vehicle 100 meets the corresponding preset braking conditions, it can control the hybrid vehicle 100 to perform regenerative braking, or regenerative braking and mechanical braking.

Referring to FIG. 4 , in some embodiments, step 012: when it is determined that the current braking energy of the hybrid vehicle 100 meets the corresponding preset braking condition according to the current battery chargeable energy of the hybrid vehicle 100 and the current reverse power consumption of the engine 28 , includes:

Step 0121: Under the condition that the current braking energy is less than or equal to the chargeable energy of the battery of the hybrid vehicle 100, the hybrid vehicle 100 is controlled to perform regenerative braking;

Step 0122: Under the condition that the current braking energy is greater than the battery chargeable energy of the hybrid vehicle 100 and less than or equal to the sum of the battery chargeable energy of the hybrid vehicle 100 and the maximum current reverse power consumption of the engine 28, the hybrid vehicle 100 is controlled to perform regenerative braking;

Step 0123: Under the condition that the current braking energy is greater than the sum of the battery chargeable energy of the hybrid vehicle 100 and the maximum current reverse power consumption of the engine 28, the hybrid vehicle 100 is controlled to perform regenerative braking and mechanical braking.

In this way, by comparing the current braking energy and the rechargeable energy of the battery of the hybrid vehicle 100, it is possible to determine whether the braking energy generated by the hybrid vehicle 100 can be converted into electrical energy by the drive motor 22 and stored in the battery 24, so that the hybrid vehicle 100 can be braked using regenerative braking, avoiding the long-term use of mechanical braking, and improving the frequency of use of regenerative braking and driving safety.

Specifically, the hybrid vehicle 100 includes a drive motor 22, which can convert the braking energy generated when the hybrid vehicle 100 brakes into electrical energy. The hybrid vehicle 100 also includes a battery 24, which can be a rechargeable battery 24, and the battery 24 can be used to store electrical energy or provide the hybrid vehicle 100 with electrical energy required for driving.

After acquiring the current braking energy of the hybrid vehicle 100, the processor 15 needs to compare the current braking energy with the rechargeable energy of the battery 24, and under the condition that the current braking energy is less than the rechargeable energy of the battery 24 of the hybrid vehicle 100, that is, the rechargeable energy of the battery 24 exceeds the current braking energy, the processor 15 can control the hybrid vehicle 100 to perform regenerative braking.

Under the condition that the current braking energy is greater than the battery rechargeable energy of the hybrid vehicle 100, and less than the sum of the battery rechargeable energy and the maximum current engine reverse power consumption, that is, the rechargeable capacity of the battery 24 cannot handle the current braking energy, but the current braking energy can be consumed by processing through the battery 24 and the engine 28, the processor 15 can control the hybrid vehicle 100 to perform regenerative braking.

Under the condition that the current braking energy is greater than the sum of the battery's chargeable energy and the maximum current engine's reverse power consumption, that is, there is still some braking energy remaining after consumption by the battery 24 and the engine 28, the processor 15 can control the hybrid vehicle 100 to perform regenerative braking and mechanical braking.

Referring to FIG. 5 , in some embodiments, step 012 : controlling the hybrid vehicle 100 to perform regenerative braking or regenerative braking and mechanical braking, includes:

Step 0124: Control the battery 24 of the hybrid vehicle 100 to store a first electric energy, where the first electric energy is obtained by converting the current braking energy of the driving motor 22 of the hybrid vehicle 100;

Step 0125: Control the generator 26 of the hybrid vehicle 100 to drive the engine 28 to consume the second electric energy, where the second electric energy is the remaining electric energy of the first electric energy stored in the battery 24 of the hybrid vehicle 100;

Step 0126: Control the brake caliper 31 and the brake pad 32 of the hybrid vehicle 100 to consume the remaining braking energy, where the remaining braking energy is the current braking energy remaining after the driving motor 22 of the hybrid vehicle 100 recovers.

In this way, by controlling the drive motor 22 to convert the braking energy of the hybrid vehicle 100 into electrical energy, the utilization rate of resources can be improved, and by storing electrical energy in the battery 24 and controlling the generator 26 to drive the engine 28 to consume electrical energy, it is possible to avoid long-term use of mechanical braking, thereby improving the frequency of use of regenerative braking and driving safety.

Specifically, after the processor 15 obtains the current braking energy of the hybrid vehicle 100, and under the condition that the current braking energy is less than or equal to the rechargeable energy of the battery 24 of the hybrid vehicle 100, that is, the rechargeable capacity of the battery 24 exceeds the current braking energy, the processor 15 can control the battery 24 of the hybrid vehicle 100 to store the first electrical energy obtained by the drive motor 22 of the hybrid vehicle 100 converting the current braking energy.

Under the condition that the current braking energy is greater than the battery chargeable energy of the hybrid vehicle 100, and less than or equal to the sum of the battery chargeable energy and the maximum current engine reverse power consumption, that is, the battery 24 of the hybrid vehicle 100 cannot process the current braking energy, but the current braking energy can be consumed by processing the battery 24 and the engine 28 together, the processor 15 can control the battery 24 of the hybrid vehicle 100 to store the first electric energy obtained by converting the current braking energy of the drive motor 22 of the hybrid vehicle 100, and control the generator 26 of the hybrid vehicle 100 to drive the engine 28 to consume the second electric energy. The second electric energy is the remaining electric energy of the battery 24 of the hybrid vehicle 100 storing the first electric energy.

Under the condition that the current braking energy is greater than the sum of the battery's rechargeable energy and the maximum current engine's reverse power consumption, that is, there is still some current braking energy remaining after consumption by the battery 24 and the engine 28, the processor 15 can control the battery 24 to store part of the electric energy converted from the current braking energy and control the generator 26 to drag the engine 28 to consume part of the electric energy converted from the current braking energy, and the remaining current braking energy is consumed by the brake caliper 31 and the brake pad 32 of the hybrid vehicle 100.

Please refer to FIG. 6 . In some embodiments, step 0125: controlling the generator 26 of the hybrid vehicle 100 to drive the engine 28 to consume the second electric energy, where the second electric energy is the remaining electric energy of the first electric energy stored in the battery 24 of the hybrid vehicle 100 , includes:

Step 01251: Determine the reverse towing power consumption of the engine 28 of the current hybrid vehicle 100 according to the current state information of the hybrid vehicle 100;

Step 01252: According to the current reverse power consumption of the engine 28, the generator 26 of the hybrid vehicle 100 is controlled to drive the engine 28 to consume the second electric energy.

In this way, by obtaining the reverse towing power consumption of the engine 28 of the moving vehicle, the braking energy consumed when the generator 26 tows the engine 28 can be accurately obtained, so as to determine whether the battery 24 and the generator 26 tow the engine 28 can consume all the braking energy and avoid the use of mechanical braking.

Specifically, the processor 15 can determine the reverse towing power consumption of the current engine 28 of the hybrid vehicle 100 according to the status information of the hybrid vehicle 100, that is, the processor 15 can obtain the reverse towing torque of the engine 28 according to the ambient temperature of the hybrid vehicle 100, the water temperature of the engine 28, the speed of the engine 28, the throttle opening and the variable valve timing angle, and then obtain the reverse towing power consumption of the engine 28, and the hybrid vehicle 100 in different states can determine different reverse towing power consumptions of the engine 28.

For example, first, the hybrid vehicle 100 uses the engine 28 test bench to reverse the engine 28 with the motor under the conditions of an ambient temperature of 25° C., an engine 28 water temperature of 30° C., an engine 28 speed of 500 rpm, a throttle opening of 0, and a variable valve timing angle of -30°, so as to obtain the reverse power consumption of the engine 28. The variable valve timing angle ranges from -30 degrees to 30 degrees.

Then, keep the ambient temperature, engine 28 water temperature, engine 28 speed, and throttle opening unchanged, adjust the variable valve timing angle in steps of 10°, and repeat the test until the variable valve timing angle is adjusted to the maximum adjustment angle, so that the reverse drag power consumption of multiple engines 28 can be obtained.

Next, keep the ambient temperature, engine 28 water temperature and engine 28 speed unchanged, adjust the throttle opening, increase the throttle opening in steps of 5%, and repeat the test until the throttle opening is 100%. By testing the reverse power of the engine 28 at different throttle openings and different variable valve timing angles, the reverse power consumption of multiple engines 28 can be obtained.

Again, keep the ambient temperature and the water temperature of the engine 28 unchanged, adjust the engine 28 speed, and increase the engine 28 speed in steps of 500 rpm, and repeat the test until the throttle opening is 100%. By testing different engine 28 speeds, different throttle openings and different variable valve timing angles, the reverse drag power consumption of multiple engines 28 can be obtained.

Next, keep the ambient temperature unchanged, adjust the water temperature of the engine 28, increase the water temperature of the engine 28 in steps of 30°C, and repeat the test until the water temperature of the engine 28 reaches 90°C. By testing different engine 28 water temperatures, different engine 28 speeds, different throttle openings and different variable valve timing angles, the reverse drag power consumption of multiple engines 28 can be obtained.

Finally, the ambient temperature is adjusted between minus 30 degrees Celsius and 40 degrees Celsius, and the test is repeated. By testing different ambient temperatures, different engine 28 water temperatures, different engine 28 speeds, different throttle openings, and different variable valve timing angles, the reverse drag power consumption of multiple engines 28 can be obtained.

By obtaining the reverse towing power consumption of the engine 28 under different working conditions, a multidimensional table of reverse towing power consumption under different parameters can be formed, and the untested ambient temperature point and engine 28 water temperature point data can be supplemented in the reverse towing power consumption multidimensional table through interpolation processing, and then the reverse towing power consumption multidimensional table is stored in the engine controller or the vehicle controller. After obtaining the reverse towing power consumption of the engine 28, the processor 15 can control the generator 26 of the hybrid vehicle 100 to drive the engine 28 to consume the second electric energy.

Please refer to FIG. 7 , in some embodiments, the control method further includes:

Step 013: determining the acoustic vibration roughness of the hybrid vehicle 100 according to historical status information of the hybrid vehicle 100;

Step 014: When the acoustic vibration roughness is minimal and the reverse towing power consumption of the current engine 28 of the hybrid vehicle 100 is the same, determine the state information of the current hybrid vehicle 100 when the engine 28 is reverse towing.

In this way, by acquiring the acoustic roughness of the hybrid vehicle 100 , the current state information of the hybrid vehicle 100 corresponding to the minimum acoustic roughness can be used when the reverse power consumption of the engine 28 is the same, thereby reducing noise as much as possible and improving user comfort.

Specifically, when determining the reverse towing power consumption of the engine 28 based on the historical status information of the hybrid vehicle 100, the acoustic vibration roughness of the hybrid vehicle 100 is different under different test conditions, that is, the noise generated by the generator 26 dragging the engine 28 is different. Therefore, when determining that the reverse towing power consumption of the engine 28 of the hybrid vehicle 100 is the same, selecting the current status information of the hybrid vehicle 100 with the smallest acoustic vibration roughness can improve the user's comfort.

For example, when the hybrid vehicle 100 is at an ambient temperature of 25° C., the engine 28 water temperature is 30° C., the engine 28 speed is 500 rpm, the throttle opening is 0, and the variable valve timing angle is -30°, the engine 28 is reversed by the motor using the engine 28 test bench, and the acoustic vibration roughness of the hybrid vehicle 100 under this working condition is simultaneously tested.

Then, when the ambient temperature, the engine 28 water temperature, the engine 28 speed, the throttle opening, and the variable valve timing angle are changed respectively, the acoustic vibration roughness of the hybrid vehicle 100 is obtained, so that the minimum acoustic vibration roughness corresponding to the current reverse power consumption of the engine 28 can be obtained.

Referring to Fig. 8, the control device 10 according to the embodiment of the present invention is used for a hybrid vehicle 100, and the control device 10 includes an acquisition module 11 and a first control module 12. The acquisition module 11 is used to acquire the current reverse power consumption of the engine 28; the first control module 12 is used to control the hybrid vehicle 100 to perform regenerative braking or regenerative braking and mechanical braking when it is determined that the current braking energy of the hybrid vehicle 100 meets the corresponding preset braking condition according to the current state information of the hybrid vehicle 100 and the current reverse power consumption of the engine 28.

The first control module 12 is specifically used to control the hybrid vehicle 100 to perform regenerative braking when the current braking energy is less than or equal to the battery chargeable energy of the hybrid vehicle 100; to control the hybrid vehicle 100 to perform regenerative braking when the current braking energy is greater than the battery chargeable energy of the hybrid vehicle 100 and less than or equal to the sum of the battery chargeable energy of the hybrid vehicle 100 and the maximum current reverse power consumption of the engine 28; and to control the hybrid vehicle 100 to perform regenerative braking and mechanical braking when the current braking energy is greater than the sum of the battery chargeable energy of the hybrid vehicle 100 and the maximum current reverse power consumption of the engine 28.

The first control module 12 is specifically used to control the battery 24 of the hybrid vehicle 100 to store a first electric energy, where the first electric energy is obtained by converting the current braking energy of the drive motor 22 of the hybrid vehicle 100; control the generator 26 of the hybrid vehicle 100 to drive the engine 28 to consume a second electric energy, where the second electric energy is the remaining electric energy of the first electric energy stored in the battery 24 of the hybrid vehicle 100; and control the brake caliper 31 and the brake pad 32 of the hybrid vehicle 100 to consume the remaining braking energy, where the remaining braking energy is the current braking energy remaining after the drive motor 22 of the hybrid vehicle 100 recovers.

The first control module 12 is specifically used to determine the reverse towing power consumption of the engine 28 of the current hybrid vehicle 100 according to the current state information of the hybrid vehicle 100; and control the generator 26 of the hybrid vehicle 100 to drive the engine 28 to consume the second electric energy according to the current reverse towing power consumption of the engine 28.

The control device 10 further includes a determination module 13 , which is specifically configured to determine the acoustic vibration harshness of the hybrid vehicle 100 according to historical status information of the hybrid vehicle 100 .

The control device 10 further includes a second control module 14 , which is specifically configured to determine the state information of the hybrid vehicle 100 when the current engine 28 is towing in reverse when the acoustic vibration roughness is minimal and the reverse towing power consumption of the current engine 28 of the hybrid vehicle 100 is the same.

The control device 10 is described above from the perspective of functional modules in conjunction with the accompanying drawings. The functional modules can be implemented in hardware form, can be implemented in software form, or can be implemented in combination with hardware and software modules. Specifically, the steps of the method embodiment in the embodiment of the present invention can be completed by the hardware integrated logic circuit and/or software form instructions in the processor 15, and the steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware coding processor to execute, or can be executed by a combination of hardware and software modules in the coding processor. Optionally, the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 16, and the processor 15 reads the information in the memory 16 and completes the steps in the above method embodiment in combination with its hardware.

Please refer to Figure 9. An embodiment of the present invention further provides a non-volatile computer-readable storage medium 40 on which a computer program 161 is stored. When the computer program 161 is executed by the processor 15, the steps of the control method of any of the above-mentioned embodiments are implemented. For the sake of brevity, they are not repeated here.

In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are optional and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims (11)

1. A control method for a hybrid vehicle, characterized by comprising:

Acquiring the reverse power consumption of the current engine;

under the condition that the current braking energy of the hybrid vehicle accords with corresponding preset braking conditions according to the chargeable energy of the battery of the hybrid vehicle and the backward dragging power consumption of the engine, controlling the hybrid vehicle to perform regenerative braking or regenerative braking and mechanical braking;

The current reverse power consumption of the engine is obtained according to a reverse power consumption data table of the engine of the hybrid vehicle, the reverse power consumption data table of the engine of the hybrid vehicle is determined by historical state information of the hybrid vehicle, and the reverse power consumption data table is configured to be stored in an engine controller or a whole vehicle controller of the hybrid vehicle;

the control method further includes:

determining the sound vibration roughness of the hybrid vehicle according to the historical state information of the hybrid vehicle;

And determining the state information of the hybrid vehicle at present when the engine is reversed under the condition that the sound vibration roughness is minimum and the reversed power consumption of the current engine of the hybrid vehicle is the same.

2. The control method according to claim 1, characterized in that, in the case where it is determined that the current braking energy of the hybrid vehicle meets the corresponding preset braking condition based on the current chargeable battery energy of the hybrid vehicle and the current reverse power consumption of the engine, it includes:

controlling the hybrid vehicle to perform regenerative braking under the condition that the current braking energy is less than or equal to the chargeable battery energy of the hybrid vehicle;

controlling the hybrid vehicle to perform regenerative braking under the condition that the current braking energy is larger than the chargeable battery energy of the hybrid vehicle and smaller than or equal to the sum of the chargeable battery energy of the hybrid vehicle and the maximum current engine reverse towing power consumption;

and controlling the hybrid vehicle to perform regenerative braking and mechanical braking under the condition that the current braking energy is larger than the sum of the chargeable battery energy of the hybrid vehicle and the reverse power consumption of the maximum current engine.

3. The control method according to claim 2, characterized in that the controlling the hybrid vehicle to perform regenerative braking or regenerative braking and mechanical braking includes:

Controlling a battery of the hybrid vehicle to store first electric energy, wherein the first electric energy is obtained by converting the current braking energy for a driving motor of the hybrid vehicle;

Controlling a generator of the hybrid vehicle to drag the engine to consume second electric energy, wherein the second electric energy is electric energy which is remained by the first electric energy stored in a battery of the hybrid vehicle;

and controlling the brake calipers and the brake pads of the hybrid vehicle to consume residual braking energy, wherein the residual braking energy is the current braking energy which is remained after the driving motor of the hybrid vehicle recovers.

4. A control method in accordance with claim 3, wherein said controlling the generator of the hybrid vehicle to drag the engine to consume a second electric energy, the second electric energy being electric energy remaining from the first electric energy stored for the battery of the hybrid vehicle, comprises:

Determining the backward dragging power consumption of the engine of the current hybrid vehicle according to the state information of the current hybrid vehicle;

and controlling a generator of the hybrid vehicle to drag the engine to consume the second electric energy according to the current reverse drag power consumption of the engine.

5. The control method according to claim 1, characterized in that the state information of the hybrid vehicle includes an ambient temperature of the hybrid vehicle, an engine water temperature of the hybrid vehicle, an engine speed of the hybrid vehicle, a throttle opening of the hybrid vehicle, and a variable valve timing angle of the hybrid vehicle.

6. The control method according to claim 1, characterized in that obtaining the current reverse power consumption of the engine includes:

And according to the current state information of the hybrid vehicle, controlling an engine controller or a whole vehicle controller of the hybrid vehicle to call the reverse power consumption data table so as to determine the reverse power consumption of the current engine.

7. A control device for a hybrid vehicle, characterized by comprising:

The acquisition module is used for acquiring the reverse power consumption of the current engine;

The first control module is used for controlling the hybrid vehicle to perform regenerative braking or regenerative braking and mechanical braking under the condition that the current braking energy of the hybrid vehicle is determined to be in accordance with corresponding preset braking conditions according to the current state information of the hybrid vehicle and the current reverse power consumption of the engine;

The current reverse power consumption of the engine is obtained according to a reverse power consumption data table of the engine of the hybrid vehicle, the reverse power consumption data table of the engine of the hybrid vehicle is determined by historical state information of the hybrid vehicle, and the reverse power consumption data table is configured to be stored in an engine controller or a whole vehicle controller of the hybrid vehicle;

The determining module is specifically used for determining the sound vibration roughness of the hybrid vehicle according to the historical state information of the hybrid vehicle;

The second control module is specifically configured to determine state information of the hybrid vehicle when the engine is reversed when the sound vibration roughness is minimum and the reversed power consumption of the current engine of the hybrid vehicle is the same.

8. A control apparatus, characterized by comprising:

a processor, a memory; and

A computer program, wherein the computer program is stored in the memory and executed by the processor, the computer program comprising instructions for executing the control method of any one of claims 1 to 6.

9. A hybrid vehicle comprising the control device according to claim 7 or 8.

10. The hybrid vehicle of claim 9, wherein the hybrid vehicle comprises an overall vehicle controller, a drive motor controller, a battery management system, a generator controller, an engine, and an engine controller;

The whole vehicle controller is used for controlling the flow direction of braking energy, the driving motor controller is used for controlling the driving motor to recover the braking energy, the battery management system is used for controlling the battery to charge, the generator controller is used for controlling the generator to drag the engine, and the engine controller is used for controlling the throttle opening of the engine and the variable valve timing angle of the engine;

And the whole vehicle controller is respectively in communication connection with the driving motor controller, the battery management system, the generator controller and the engine controller.

11. A non-transitory computer readable storage medium containing a computer program, characterized in that the computer program, when executed by a processor, causes the processor to perform the control method of any one of claims 1 to 6.