Hybrid vehicle type engine rotating speed control method and control system, vehicle and storage medium

Abstract

The invention discloses a hybrid vehicle type engine rotating speed control method which comprises the following steps: in a vehicle driving process, when a gear shifting condition is met, executing gear shifting operation; the vehicle control unit sends a regulation and control instruction to an engine controller to control the actual rotating speed of an engine; the gear shifting action is completed; the engine controller controls the output torque of the engine to meet a set condition. According to the method for controlling the rotating speed of the engine of the hybrid vehicle model, the problem that the rotating speed of the engine is abnormally increased is solved only through software strategy optimization of an existing controller without changing parts and adding other parts and controllers, reasonable control over the rotating speed of the engine is achieved, the rotating speed of the engine is controlled within a reasonable range in the gear shifting process of the vehicle, and the reliability of the vehicle is improved. The problem of abnormal rising or galloping caused by disengagement of the clutch is solved, the problems that an engine generates large noise and high oil consumption are avoided, the whole vehicle has no pause in the gear shifting process are solved, the cost of the whole vehicle is not increased, and the implementation period is short. The invention further discloses a hybrid vehicle type engine rotating speed control system, a vehicle and a computer readable storage medium.

Description

Technical Field

[0001] The present invention belongs to the field of automobile technology, and in particular, relates to a hybrid vehicle engine speed control method, a control system, a vehicle and a storage medium. Background Art

[0002] With the development and widespread popularity of hybrid vehicles, a series of issues in the actual use of hybrid vehicles have attracted widespread attention.

[0003] For example, in existing 2DHT / 3DHT hybrid models, when the vehicle is driving, the gearbox is shifting, the engine is not turned off, the clutch is disengaged for about 2 seconds, the gear is in the neutral stage, and the engine is unloaded, the engine speed is prone to abnormal increase or even overspeed, and the front cabin is subjectively felt to have obvious abnormal noise, accompanied by increased fuel consumption. Therefore, it will cause problems such as high engine noise, high fuel consumption, and vehicle setbacks.

[0004] It is hoped to provide an improved method for controlling the engine speed of a hybrid vehicle, particularly with regard to improving the problem of abnormal increase in engine speed. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for controlling the engine speed of a hybrid vehicle, the purpose of which is to achieve reasonable control of the engine speed.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for controlling the engine speed of a hybrid vehicle, comprising:

[0007] When the gear shifting condition is met during the driving of the vehicle, the gear shifting operation is performed;

[0008] The vehicle controller sends control instructions to the engine controller to control the actual speed of the engine;

[0009] Complete the gear shifting action;

[0010] The engine controller controls the output torque of the engine to meet the set conditions.

[0011] The gear shift condition is that the vehicle controller sends a gear shift request to the transmission controller.

[0012] After the vehicle controller sends a gear shift request to the transmission controller, the transmission controller controls the clutch to disengage.

[0013] The vehicle controller sends a control instruction including a speed control flag and a target speed to the engine controller, and the engine controller controls the actual speed of the engine to follow the target speed.

[0014] The engine controller controls the actual engine speed to follow the target speed by controlling the throttle opening of the engine.

[0015] The setting condition includes that the engine output torque is not greater than the engine reverse torque.

[0016] After the gear shift is completed, the clutch is engaged, the speed control request is terminated, and the engine controller responds to the torque control to control the output torque of the engine.

[0017] The present invention also provides a hybrid vehicle engine speed control system, comprising a vehicle controller, an engine controller and a transmission controller, wherein the vehicle controller is configured to send control instructions to the engine controller and send shift requests to the transmission controller, and the engine controller is configured to control the actual speed of the engine and control the output torque of the engine to meet set conditions.

[0018] The present invention also provides a vehicle, comprising the hybrid vehicle engine speed control system.

[0019] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the hybrid vehicle engine speed control method.

[0020] The hybrid vehicle engine speed control method of the present invention does not require component changes, and does not add other components and controllers. It only solves the problem of abnormal increase in engine speed through optimization of existing controller software strategies, and realizes reasonable control of the engine speed. During the gear shifting process, the engine speed of the vehicle is controlled within a reasonable range, and there will be no abnormal increase or runaway problems due to clutch disengagement, thereby avoiding the engine from generating large noise and high fuel consumption. There is no setback problem of the whole vehicle during the gear shifting process, and the cost of the whole vehicle is not increased, and the implementation period is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a flow chart of the engine speed control method of a hybrid vehicle model of the present invention. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] The present invention provides a method for controlling the engine speed of a hybrid vehicle, so that the engine speed of the vehicle can be controlled within a reasonable range during the gear shifting process, and the problem of abnormal increase or runaway will not occur due to clutch disengagement.

[0025] In order to solve the above-mentioned technical problems, the present invention adopts the following solutions:

[0026] 1. The system involved in the method is that the transmission controller (TCU) controls the clutch to disengage upon receiving a request from the vehicle controller (HCU);

[0027] 2. The engine control system (EMS) receives the speed control request and target speed from the vehicle control unit (HCU), and requests a torque not greater than the engine reverse torque;

[0028] 3. After receiving the speed control request and the target speed, the engine controller (EMS) controls the throttle opening to control the actual engine speed to follow the target speed;

[0029] 4. After the gear shift is completed, the clutch engages, the speed control request is exited, and the engine controller (EMS) responds to the torque control to control the engine torque.

[0030] Specifically, the present invention provides a method for controlling the engine speed of a hybrid vehicle, comprising:

[0031] When the gear shifting condition is met during the driving of the vehicle, the gear shifting operation is performed;

[0032] The vehicle controller sends control instructions to the engine controller to control the actual speed of the engine;

[0033] Complete the gear shifting action;

[0034] The engine controller controls the output torque of the engine to meet the set conditions.

[0035] The gear shift condition is that the vehicle controller sends a gear shift request to the transmission controller.

[0036] After the vehicle controller sends a gear shift request to the transmission controller, the transmission controller controls the clutch to disengage.

[0037] The vehicle controller sends a control instruction including a speed control flag and a target speed to the engine controller, and the engine controller controls the actual speed of the engine to follow the target speed.

[0038] The engine controller controls the actual engine speed to follow the target speed by controlling the throttle opening of the engine.

[0039] The setting condition includes that the engine output torque is not greater than the engine reverse torque.

[0040] After the gear shift is completed, the clutch is engaged, the speed control request is terminated, and the engine controller responds to the torque control to control the output torque of the engine.

[0041] The present invention also provides a hybrid vehicle engine speed control system, comprising a vehicle controller, an engine controller and a transmission controller, wherein the vehicle controller is configured to send control instructions to the engine controller and send shift requests to the transmission controller, and the engine controller is configured to control the actual speed of the engine and control the output torque of the engine to meet set conditions.

[0042] The present invention also provides a vehicle, comprising the hybrid vehicle engine speed control system.

[0043] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the hybrid vehicle engine speed control method.

[0044] Example

[0045] First, as Figure 1 As shown, an embodiment of the present invention provides a method for controlling the engine speed of a hybrid vehicle, comprising the following steps:

[0046] S1. When the gear shifting condition is met during vehicle driving, a gear shifting operation is performed;

[0047] S2, the vehicle controller sends a control instruction to the engine controller to control the actual speed of the engine;

[0048] S3, completing the gear shifting action;

[0049] S4: The engine controller controls the output torque of the engine to meet the set conditions.

[0050] Specifically, if Figure 1 As shown, in the above step S1, the gear shifting condition is that the vehicle control unit (HCU) sends a gear shifting request to the transmission control unit (TCU), and the transmission control unit controls the engagement and disengagement of the clutch.

[0051] like Figure 1 As shown, in the above step S1, after the vehicle controller sends a shift request to the transmission controller, the transmission controller controls the clutch to disengage. The clutch is located between the engine and the transmission. When the clutch is in a disengaged state, the power of the engine cannot be transmitted to the transmission.

[0052] like Figure 1 As shown, in the above step S2, the control instruction sent by the vehicle controller to the engine controller (EMS) includes the speed control flag and the target speed of the engine. After receiving the control instruction from the vehicle controller, the engine controller controls the actual speed of the engine to follow the target speed, and controls the engine speed within a reasonable range, so that the speed will not increase abnormally or runaway due to the clutch disengagement.

[0053] like Figure 1 As shown, in the above step S2, after the engine controller receives the speed control request and the target speed, the engine controller controls the engine throttle opening to control the actual engine speed to follow the target speed. The engine controller controls the engine speed in response to the target speed sent by the vehicle controller to achieve reasonable control of the engine speed.

[0054] like Figure 1 As shown, in the above step S3, the gearbox controller completes the gear shifting action and controls the clutch to be in a engaged state, so that the power of the engine can be transmitted to the gearbox.

[0055] like Figure 1 As shown, in the above step S4, the setting conditions include that the engine output torque is not greater than the engine reverse torque at this time. After the gear shift is completed, the clutch is engaged, the speed control request is exited, and the engine controller responds to the torque control to control the output torque of the engine so that the output torque is not greater than the engine reverse torque at this time. This can optimize the engine's operating speed range to a certain extent and make it closer to the optimal fuel economy area. Moreover, by controlling the output torque to be not greater than the reverse torque, while ensuring the driving performance, the adverse effects of excessive torque output on the vehicle can be avoided, the smoothness of the gear shift can be improved, and the driving experience can be enhanced. Stable torque output helps to maintain the stable operation of the engine and reduce failures and damage caused by sudden load changes.

[0056] In a second aspect of the present invention, an embodiment of the present invention further provides a hybrid vehicle engine speed control system for implementing a hybrid vehicle engine speed control method, comprising a vehicle controller, an engine controller and a transmission controller, wherein the engine controller and the transmission controller are electrically connected to the vehicle controller. The vehicle controller is configured to send a control instruction to the engine controller and a shift request to the transmission controller, and the engine controller is configured to control the actual speed of the engine and control the output torque of the engine to meet a set condition.

[0057] During vehicle driving, after the vehicle controller sends a gear shift request to the transmission controller, the transmission controller controls the clutch to switch to the disengaged state, and the engine power cannot be transmitted to the transmission.

[0058] After the clutch switches to the disengaged state, the engine controller receives the control command from the vehicle controller. The engine controller controls the actual engine speed to follow the target speed and keeps the engine speed within a reasonable range. The clutch will not be disengaged, causing abnormal speed increase or runaway problems.

[0059] The transmission controller completes the gear shifting action and controls the clutch to be in the engaged state so that the engine power can be transmitted to the transmission.

[0060] After the gear shift is completed, the clutch is engaged, the speed control request is exited, and the engine controller responds to the torque control. The engine controller controls the output torque of the engine so that the output torque is not greater than the engine reverse torque at this time.

[0061] In a third aspect of the present invention, an embodiment of the present invention further provides a vehicle, including the hybrid vehicle engine speed control system described above. The hybrid vehicle engine speed control system implements the hybrid vehicle engine speed control method described above, which will not be described in detail here. Since the vehicle of the embodiment of the present invention includes the hybrid vehicle engine speed control system in the above embodiment, it has all the advantages of the hybrid vehicle engine speed control system described above.

[0062] In an embodiment of the present invention, the vehicle is a 2DHT hybrid vehicle, and the gearbox of the 2DHT hybrid vehicle is a 2DHT gearbox. The 2DHT gearbox has two forward gears. Compared with the traditional E-CVT (continuously variable transmission) or single-gear DHT, it can optimize the working points of the engine and the motor under a wider range of working conditions, and improve fuel economy and power performance. Through more precise gear control, the 2DHT gearbox can reduce the engine speed when the vehicle is driving at high speed, thereby reducing fuel consumption and noise. Moreover, the 2DHT gearbox has a higher transmission efficiency and can provide a stronger power output.

[0063] In an embodiment of the present invention, the vehicle may also be a 3DHT hybrid vehicle, and the gearbox of the 3DHT hybrid vehicle is a 3DHT gearbox. The 3DHT gearbox has three forward gears. Compared with the 2DHT gearbox, the 3DHT gearbox has more gear options, and can achieve more refined power distribution and more efficient energy management under more complex working conditions. Due to more gears, the 3DHT gearbox can cover a wider range of vehicle speeds, thereby achieving more comprehensive power performance and fuel economy optimization, and the multi-gear design makes the power output smoother and stronger.

[0064] In a fourth aspect of the present invention, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute a hybrid vehicle engine speed control method.

[0065] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0066] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0067] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for controlling the engine speed of a hybrid vehicle, characterized in that: include: When the gear shifting condition is met during the driving of the vehicle, the gear shifting operation is performed; The vehicle controller sends control instructions to the engine controller to control the actual speed of the engine; Complete the gear shifting action; The engine controller controls the output torque of the engine to meet the set conditions.

2. The hybrid vehicle engine speed control method according to claim 1, characterized in that: The gear shift condition is that the vehicle controller sends a gear shift request to the transmission controller.

3. The hybrid vehicle engine speed control method according to claim 2, characterized in that: After the vehicle controller sends a gear shift request to the transmission controller, the transmission controller controls the clutch to disengage.

4. The hybrid vehicle engine speed control method according to any one of claims 1 to 3, characterized in that: The vehicle controller sends a control instruction including a speed control flag and a target speed to the engine controller, and the engine controller controls the actual speed of the engine to follow the target speed.

5. The hybrid vehicle engine speed control method according to claim 4, characterized in that: The engine controller controls the actual engine speed to follow the target speed by controlling the throttle opening of the engine.

6. The hybrid vehicle engine speed control method according to any one of claims 1 to 5, characterized in that: The setting condition includes that the engine output torque is not greater than the engine reverse torque.

7. The hybrid vehicle engine speed control method according to claim 6, characterized in that: After the gear shift is completed, the clutch is engaged, the speed control request is terminated, and the engine controller responds to the torque control to control the output torque of the engine.

8. Hybrid vehicle engine speed control system, characterized in that: It includes a vehicle controller, an engine controller and a transmission controller. The vehicle controller is configured to send control instructions to the engine controller and send shift requests to the transmission controller. The engine controller is configured to control the actual speed of the engine and control the output torque of the engine to meet set conditions.

9. A vehicle, characterized in that Including the hybrid vehicle engine speed control system.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the hybrid vehicle engine speed control method.

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