Method for controlling engine fuel injector bycombined pulse spectrum

Abstract

The invention provides a method for controlling a fuel injector of an engine by a combined pulse spectrum, belonging to the vehicle gasoline engine control field, comprising a basic fuel injecting pulse spectrum parameter and a dynamic fuel injecting pulse spectrum parameter, wherein, the basic fuel injecting pulse spectrum parameter is standardized by a jack horse or optimized and standardized bythe jack horse and a road parameter, the dynamic fuel injection pulse spectrum parameter is generated by the self-standardization of the self-study on line of a control system and the self-optimization, and the adaptively control of the fuel injector of the gasoline engine is controlled by the control system according to a fuel injecting pulse width control strategy. The combined pulse spectrum control way synthesized by the self-adapting study method is adopted; therefore, the influence of the change in a controlled system and the unknown change on the engine is corrected, thereby improvingthe control accuracy of the open-loop control and increasing the speed. The self-adapting study controls the strategy generating a dynamic fuel injecting pulse spectrum and advances the predictive control, thereby correcting the control lag generated by various time-lag effects and improving the timeliness of the control.

Description

technical field [0001] The invention relates to a method for controlling an engine fuel injector by combining maps, belonging to the field of automobile gasoline engine control. Background technique [0002] The control of gasoline engines for vehicles is mainly divided into ignition control and fuel injector control. [0003] In the control process, the control unit checks the control map parameters according to the basic control conditions, and corrects and outputs the control map parameters according to the engine state conditions reflected by each sensor, and controls each actuator to control the target. Control is divided into open-loop control and closed-loop control. [0004] The control of the fuel injector is mainly to detect the intake air flow, and calculate the fuel injection time to determine the fuel injection quantity through the intake flow signal and other sensor signals according to different working conditions; the control of the fuel injection quantity i...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a strategy for adaptively generating dynamic map parameters according to changes in engine-related characteristics and engine use conditions during the working process for the problems existing in the current gasoline engine control methods. Furthermore, a method for controlling the fuel injector of an engine by combining the dynamic map parameters and the basic map parameters calibrated by the original prototype bench is provided.

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