Method and system for controlling self-learning of continuous variable valve lift system

Abstract

The invention provides a method and system for controlling self-learning of a continuous variable valve lift system. The method comprises the steps that a top dead center self-learning result and a credibility result of a lift signal in an operation process of an engine is obtained, and whether the continuous variable valve lift system needs self-learning or not is judged; if the continuous variable valve lift system needs self-learning, whether the continuous variable valve lift system can conduct self-learning or not is judged; if the continuous variable valve lift system does not need self-learning, the continuous variable valve lift system enters a normal lift control mode, if the continuous variable valve lift system can conduct self-learning, the continuous variable valve lift systemis controlled to conduct self-learning; and if the continuous variable valve lift system can not conduct self-learning, the continuous variable valve lift system is controlled to enter a fault lift control mode. According to the method and the system, the problem that the continuous variable valve lift system is low in lift control precision can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a method and system for controlling self-learning of a continuously variable valve lift system. Background technique [0002] With the continuous consumption of energy and the improvement of vehicle emission requirements, the engine power, economy and emission of vehicles have become the focus of attention. Since the vehicle can use CVVL (Continuously variable valve lift, continuously variable valve lift) device to change the valve lift according to different working conditions of the engine, reduce pumping loss and friction loss, thereby reducing fuel consumption and improving engine power, therefore, continuous The application of variable valve lift system in vehicles has become a new trend. [0003] In the process of adjusting the valve lift of the engine to control the intake air volume of the engine through the continuously variable valve lift system, the precise control o...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method and system for controlling the self-learning of the continuously variable valve lift system, so as to solve the problem of low lift control accuracy of the existing continuously variable valve lift system

Images