Vehicle crawling control method, medium, vehicle controller and automatic transmission vehicle

Abstract

The invention relates to the technical field of vehicle control, and provides a vehicle crawling control method, a medium, a vehicle controller and an automatic transmission vehicle. The vehicle creeping control method comprises the steps that when a vehicle enters a creeping working condition, whether the idle speed request value of a transmission is larger than the idle speed value of an engine or not is judged; if yes, determining that the engine speed is equal to the transmission idle speed request value; if not, the idle speed request value of the transmission is updated to be the sum value of the idle speed value of the engine and a preset compensation value, and it is determined that the rotating speed of the engine is equal to the updated idle speed request value of the transmission; and the determined rotating speed of the engine serves as the target idle speed, and the engine is controlled to rise to the target idle speed from the current rotating speed so as to drive the vehicle to creep. The problems that the rotating speed of an engine drops and even flames out when a vehicle enters a creeping working condition in special environments such as low temperature and plateau can be avoided.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a vehicle creep control method, a medium, a vehicle controller and an automatic transmission vehicle. Background technique [0002] With the continuous development of science and technology and society, people have higher and higher requirements for vehicle driving comfort, and the levels involved in the subsequent development of vehicle control technology are becoming more and more refined. For example, in order to meet the driver's driving needs for automatic transmission vehicles, OEMs and transmission manufacturers need to precisely control automatic transmission vehicles to ensure driving experience under creeping conditions. However, the current control strategy for creeping conditions cannot meet the creep function requirements in special environments such as low temperature or plateau. Insufficient gas volume will cause the engine to fail to output more torque, w...

AI Technical Summary

Problems solved by technology

However, the current control strategy for creeping conditions cannot meet the creep function requirements in special environments such as low temperature or plateau. Insufficient gas volume will cause the engine to be unable to output more torque, which is manifested as a larger load

Therefore, in special environments such as plateaus, the greater the load, the more likely the engine will not be able to output greater torque due to insufficient intake air. However, in the current creep control strategy, the engine can only compensate for torque by increasing the intake air. To drive the load, the response of the vehicle will be slower, which will easily cause the engine speed to drop, or even the risk of flameout

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