CN-119348608-B - Mixed motor vehicle type engine rotating speed control method, control system, vehicle and storage medium

CN119348608BCN 119348608 BCN119348608 BCN 119348608BCN-119348608-B

Abstract

The invention discloses a speed control method of a hybrid vehicle type engine, which comprises the steps of executing gear shifting operation when gear shifting conditions are met in the running process of a vehicle, sending a regulating instruction to an engine controller by a whole vehicle controller to control the actual speed of the engine, completing gear shifting operation, and controlling the output torque of the engine to meet set conditions by the engine controller. The method for controlling the rotating speed of the hybrid vehicle type engine does not need to change parts and add other parts and controllers, solves the problem of abnormal rising of the rotating speed of the engine only through the prior controller software strategy optimization, realizes reasonable control of the rotating speed of the engine, ensures that the rotating speed of the engine is controlled within a reasonable range in the gear shifting process of the vehicle, and can not cause the problem of abnormal rising or galloping due to the disengaging of a clutch, thereby avoiding the problems of larger noise and higher oil consumption of the engine, avoiding the problem of no-stop of the whole vehicle in the gear shifting process, and realizing short period. The invention also discloses a system for controlling the rotation speed of the hybrid vehicle type engine, a vehicle and a computer readable storage medium.

Inventors

WANG KE
DAI LIHONG
Xu Geqian
PAN CHENGJUN
LIU CHUANG
YAO GANG

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20240726

Claims (10)

1. The method for controlling the rotating speed of the hybrid vehicle type engine is characterized by comprising the following steps: s1, executing gear shifting operation when gear shifting conditions are met in the running process of a vehicle; S2, the whole vehicle controller sends a regulating and controlling instruction to the engine controller to control the actual rotation speed of the engine; s3, completing gear shifting action; s4, controlling the output torque of the engine to meet a set condition by the engine controller; In the step S1, after the whole vehicle controller sends a gear shifting request to the gear box controller, the gear box controller controls the clutch to be disconnected, the clutch is positioned between the engine and the gear box, and after the clutch is in a disconnected state, the power of the engine cannot be transmitted to the gear box; In step S2, the regulating and controlling instruction sent by the whole vehicle controller to the engine controller comprises a rotating speed control zone bit for controlling the engine and a target rotating speed, wherein after the regulating and controlling instruction of the whole vehicle controller is received by the engine controller, the actual rotating speed of the engine is controlled by the engine controller to follow the target rotating speed, and the rotating speed of the engine is controlled in a reasonable range, so that the problem of abnormal rising or galloping of the rotating speed caused by the disengagement of a clutch is avoided; In step S2, after the engine controller receives the rotation speed control request and the target rotation speed, the engine controller controls the actual rotation speed of the engine to follow the target rotation speed by controlling the opening degree of a throttle valve of the engine, and the engine controller responds to the target rotation speed sent by the whole vehicle controller by controlling the rotation speed of the engine to realize reasonable control of the rotation speed of the engine.
2. The hybrid vehicle type engine speed control method according to claim 1, wherein the shift condition is that the vehicle controller transmits a shift request to a transmission controller.
3. The method according to claim 2, wherein the transmission controller controls the clutch to be disengaged after the vehicle controller transmits a shift request to the transmission controller.
4. The method for controlling the rotational speed of the hybrid vehicle type engine according to any one of claims 1 to 3, wherein the whole vehicle controller sends the regulation command to the engine controller, the regulation command comprises a rotational speed control flag bit and a target rotational speed, and the engine controller controls the actual rotational speed of the engine to follow the target rotational speed.
5. The hybrid vehicle type engine speed control method according to claim 4, wherein the engine controller controls the actual engine speed to follow the target engine speed by controlling a throttle opening of the engine.
6. A hybrid vehicle type engine speed control method according to any one of claims 1 to 3, wherein the set condition includes the engine output torque not being greater than the engine reverse torque.
7. The hybrid vehicle type engine speed control method according to claim 6, wherein after completion of the shift, the clutch is engaged, the speed control is requested to be exited, and the engine controller controls the output torque of the engine in response to the torque control.
8. A hybrid vehicle type engine speed control system that implements the hybrid vehicle type engine speed control method according to any one of claims 1 to 7, characterized by comprising a vehicle controller, an engine controller, and a transmission controller, the vehicle controller being configured to send a regulation instruction to the engine controller and a shift request to the transmission controller, the engine controller being configured to control an actual speed of an engine and to control an output torque of the engine to satisfy a set condition.
9. A vehicle comprising the hybrid vehicle-type engine speed control system according to claim 8.
10. A computer-readable storage medium storing computer-executable instructions for causing a computer to execute the hybrid vehicle type engine speed control method according to any one of claims 1 to 7.

Description

Mixed motor vehicle type engine rotating speed control method, control system, vehicle and storage medium Technical Field The invention belongs to the technical field of automobiles, and particularly relates to a method and a system for controlling the rotating speed of a hybrid electric vehicle type engine, a vehicle and a storage medium. Background With the development and wide popularization of hybrid vehicle types, a series of problems in the actual use process of the hybrid vehicle types are widely focused. If the existing 2DHT/3DHT hybrid motor vehicle type is used, during the running process of a vehicle, in the gear shifting stage of a gearbox, when an engine is not flameout, a clutch is disengaged from about 2S, a gear is in a neutral stage, the phenomenon that the rotating speed of the engine is abnormally increased or even the vehicle flies easily occurs under the condition that the engine is not loaded, and the problem that abnormal sound of a front cabin is obvious in subjective feeling and oil consumption is increased is solved. Therefore, the problems of large engine noise, high oil consumption, vehicle pause and the like can be caused. It is desirable to provide an improved hybrid vehicle type engine speed control method, particularly with respect to improving the problem of abnormal rise in engine speed. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a method for controlling the rotating speed of a hybrid vehicle type engine, and aims to realize reasonable control of the rotating speed of the engine. In order to solve the technical problems, the technical scheme adopted by the invention is that the method for controlling the rotating speed of the hybrid vehicle type engine comprises the following steps: Executing a gear shifting operation when a gear shifting condition is satisfied during running of the vehicle; the whole vehicle controller sends a regulating and controlling instruction to the engine controller to control the actual rotating speed of the engine; Completing gear shifting action; The engine controller controls the output torque of the engine to satisfy the set condition. And the gear shifting condition is that the whole vehicle controller sends a gear shifting request to a gearbox controller. And after the whole vehicle controller sends a gear shifting request to the gearbox controller, the gearbox controller controls the clutch to be disconnected. The whole vehicle controller sends a regulation command to the engine controller, wherein the regulation command comprises a rotation speed control zone bit and a target rotation speed, and the engine controller controls the actual rotation speed of the engine to follow the target rotation speed. The engine controller controls the actual engine speed to follow the target engine speed by controlling the throttle opening of the engine. The set condition includes the engine output torque not being greater than the engine reverse torque. After gear shifting is completed, the clutch is combined, the rotating speed control request is withdrawn, and the engine controller responds to torque control to control the output torque of the engine. The invention also provides a system for controlling the rotating speed of the hybrid vehicle type engine, which comprises a whole vehicle controller, an engine controller and a gearbox controller, wherein the whole vehicle controller is arranged to send a regulating instruction to the engine controller and a gear shifting request to the gearbox controller, and the engine controller is arranged to control the actual rotating speed of the engine and control the output torque of the engine to meet the set conditions. The invention also provides a vehicle, which comprises the system for controlling the rotating speed of the hybrid vehicle type engine. The invention also provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the hybrid vehicle type engine speed control method. The method for controlling the rotating speed of the hybrid vehicle type engine does not need to change parts and add other parts and controllers, solves the problem of abnormal rising of the rotating speed of the engine only through the prior controller software strategy optimization, realizes reasonable control of the rotating speed of the engine, ensures that the rotating speed of the engine is controlled within a reasonable range in the gear shifting process of the vehicle, and can not cause the problem of abnormal rising or galloping due to the disengaging of a clutch, thereby avoiding the problems of larger noise and higher oil consumption of the engine, avoiding the problem of no-stop of the whole vehicle in the gear shifting process, and realizing short period. Drawings Fig. 1 is a flowchart of a method of controlling a rotational speed of an engine of