CN-122014452-A - Vehicle engine control method, device, equipment, vehicle and medium

CN122014452ACN 122014452 ACN122014452 ACN 122014452ACN-122014452-A

Abstract

The embodiment of the application provides a vehicle engine control method, device, equipment, a vehicle and a medium, which comprise the steps of obtaining the starting time, the cooling liquid temperature, the rotating speed and the air-fuel ratio control state of an engine when the vehicle is in a starting working condition, determining the engine state by combining the starting time, the cooling liquid temperature, the rotating speed and the air-fuel ratio control state, determining a torque limiting coefficient matched with the engine state in response to the engine state meeting a preset torque limiting condition, and controlling the output torque of the engine by adopting the torque limiting coefficient. According to the embodiment of the application, when the vehicle is in the starting working condition, the engine state is accurately identified through four dimensions of the starting time length of the engine, the temperature of the cooling liquid, the rotating speed and the air-fuel ratio control state, the output torque of the engine is limited based on the torque limiting coefficient, the phenomenon of insufficient driving power caused by abnormal sound or flameout generated by the fluctuation of the rotating speed is prevented, and the reliability of the vehicle is improved.

Inventors

DENG KUI
Wu Lunlun
QIN LING
LI JIE
LIAN XUETONG

Assignees

广州汽车集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260127

Claims (10)

1. A vehicle engine control method, characterized by comprising: acquiring the starting time length, the temperature of the cooling liquid, the rotating speed and the air-fuel ratio control state of an engine when the vehicle is in a starting working condition; Determining an engine state in combination with the start-up period, the coolant temperature, the rotational speed, and the air-fuel ratio control state; Determining a torque limiting coefficient matched with the engine state in response to the engine state meeting a preset torque limiting condition; and controlling the output torque of the engine by adopting the torque limiting coefficient.
2. The method according to claim 1, wherein the method further comprises: and when the starting time is not greater than a preset time threshold, the temperature of the cooling liquid is not greater than a preset temperature threshold, the rotating speed is in a preset rotating speed range, and the air-fuel ratio control state is an open-loop control state, determining that the engine state meets a preset torque limiting condition.
3. The method of claim 1, wherein the step of determining a torque limiting coefficient matching the engine state in response to the engine state meeting a preset torque limiting condition comprises: Obtaining torsion limiting coefficient curve data; and responding to the engine state meeting a preset torque limiting condition, and in the torque limiting coefficient curve data, determining a torque limiting coefficient based on the starting duration and the cooling liquid temperature.
4. A method according to any one of claims 1-3, wherein said step of using said torque limiting coefficient to control the output torque of said engine comprises: Obtaining the maximum torque of an engine; Correcting the maximum torque of the engine based on the torque limiting coefficient, and determining a reference torque; and controlling the output torque of the engine by adopting the reference torque.
5. The method of claim 4, wherein the step of using the torque limiting coefficient to control the output torque of the engine further comprises: determining a filter coefficient corresponding to the rotating speed; Filtering the reference torque based on the filter coefficient; And performing the step of controlling the output torque of the engine using the reference torque using the filtered reference torque.
6. The method according to claim 4, wherein the method further comprises: And when the starting time is longer than a preset time threshold, or the temperature of the cooling liquid is greater than a preset temperature threshold, or the rotating speed is not in a preset rotating speed range, or the air-fuel ratio control state is a closed-loop control state, or the torque limiting coefficient is one, controlling the output torque of the engine by adopting the maximum torque of the engine.
7. A vehicle engine control apparatus, characterized by comprising: The first acquisition module is used for acquiring the starting time length, the temperature of the cooling liquid, the rotating speed and the air-fuel ratio control state of the engine when the vehicle is in a starting working condition; The combining module is used for combining the starting time, the cooling liquid temperature, the rotating speed and the air-fuel ratio control state to determine an engine state; The torque limiting module is used for determining a torque limiting coefficient matched with the engine state in response to the engine state meeting a preset torque limiting condition; And the control module is used for controlling the output torque of the engine by adopting the torque limiting coefficient.
8. An electronic device comprising a processor and a memory, wherein, A memory for storing a computer program; A processor for executing a program stored on a memory, implementing the method of any one of claims 1-6.
9. A vehicle comprising the electronic device of claim 8.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, implements the method of any of claims 1-6.

Description

Vehicle engine control method, device, equipment, vehicle and medium Technical Field The embodiment of the application relates to the technical field of engine control, in particular to a vehicle engine control method, device, equipment, a vehicle and a medium. Background In hybrid vehicles, even though an electric drive system is often used for driving, an engine plays an important role in vehicle use to help the whole vehicle heat, drive or generate electricity, and the like, so that the power requirement of a whole vehicle controller needs to be responded in real time. In a low-temperature environment, the engine is limited by the oil-gas mixing degree, the ignition efficiency, the charging process and the like, so that the actual combustion effect is reduced. If the engine is controlled according to the maximum engine power in the whole vehicle controller, the engine speed fluctuation can be easily caused, and even the phenomenon of insufficient driving power such as flameout and the like can be caused when the engine speed is serious, so that the use reliability of the vehicle is affected. Disclosure of Invention The embodiment of the application provides a vehicle engine control method, device, equipment, a vehicle and a medium, and aims to solve the problem that the use reliability of the vehicle is affected due to the phenomenon of insufficient driving power. A vehicle engine control method comprising: acquiring the starting time length, the temperature of the cooling liquid, the rotating speed and the air-fuel ratio control state of an engine when the vehicle is in a starting working condition; Determining an engine state in combination with the start-up period, the coolant temperature, the rotational speed, and the air-fuel ratio control state; Determining a torque limiting coefficient matched with the engine state in response to the engine state meeting a preset torque limiting condition; and controlling the output torque of the engine by adopting the torque limiting coefficient. The engine state is accurately identified through four dimensions of the starting time length, the temperature of the cooling liquid, the rotating speed and the air-fuel ratio control state of the engine under the starting working condition, when the engine state meets the preset torque limiting condition, the engine is determined to be in a state that the combustion effect is affected, the rotating speed fluctuation or flameout scene is easy to cause, the torque limiting coefficient matched with the engine state can be determined, the engine is controlled based on the torque limiting coefficient, the output torque of the engine in the initial starting stage is limited, abnormal noise generated by the rotating speed fluctuation or insufficient driving power caused by flameout is prevented, and the reliability of the vehicle is improved. Optionally, the method further comprises: and when the starting time is not greater than a preset time threshold, the temperature of the cooling liquid is not greater than a preset temperature threshold, the rotating speed is in a preset rotating speed range, and the air-fuel ratio control state is an open-loop control state, determining that the engine state meets a preset torque limiting condition. And identifying and judging a scene in which high-power generation causes rotation speed fluctuation or flameout through four dimensions of the starting duration, the temperature of the cooling liquid, the rotation speed and the air-fuel ratio control state, and determining that the engine state meets the preset torque limiting condition under the condition that the starting duration, the temperature of the cooling liquid, the rotation speed and the air-fuel ratio control state all meet the corresponding conditions, so as to identify the scene in which the rotation speed fluctuation or flameout is caused. The four-dimensional information is utilized to jointly identify, so that errors caused by single condition identification are avoided, the identification accuracy can be accurately improved, and further, the control can be accurately performed. And the acquisition and the mode of the starting time, the temperature of the cooling liquid, the rotating speed and the air-fuel ratio control state can be adapted to different engines, so that the detection practicability is improved. Optionally, the step of determining the torque limiting coefficient matched with the engine state in response to the engine state meeting a preset torque limiting condition includes: Obtaining torsion limiting coefficient curve data; and responding to the engine state meeting a preset torque limiting condition, and in the torque limiting coefficient curve data, determining a torque limiting coefficient based on the starting duration and the cooling liquid temperature. When the engine state meets the preset torque limiting condition, the torque limiting coefficient is matched based on the starting time length and the c