Method for combined pulse spectrum controlling engine air fuel ratio

Abstract

The invention provides a method for controlling an air-fuel delivery ratio of an engine by a combined pulse spectrum, belonging to the vehicle gasoline engine control field, comprising a basic air-fuel delivery ratio pulse spectrum parameter and a dynamic air-fuel delivery ratio pulse spectrum parameter, wherein, the basic air-fuel delivery ratio pulse spectrum parameter is standardized by a jack horse or optimized and standardized by the jack horse and a road parameter, the dynamic air-fuel delivery ratio pulse spectrum parameter is the pulse spectrum of the on line self-standardization generated by the self-adaption and of the self-optimized refreshable air-fuel delivery ratio control, and the adaptivity control of the air-fuel delivery ratio of the gasoline engine is controlled by the control system according to a 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 improving the control accuracy of the open-loop control and increasing the speed and improving the timeliness of the control.

Description

The Method of Controlling Engine Air-Fuel Ratio by Combined Map technical field The method for controlling the air-fuel ratio of an engine by combining map belongs to the field of automobile gasoline engine control. Background technique The control of gasoline engines for vehicles is mainly divided into ignition control and fuel injector control. The fuel injection control to determine the intake air volume is the air-fuel ratio control. 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. The control of the air-fuel ratio is mainly to detect the intake air flow rate (the engine that detects the speed-density flow rate is to detect the intake manifold pressure), and the fuel...

AI Technical Summary

Problems solved by technology

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 air-fuel ratio of the engine by combining the map with the map parameters calibrated by the original bench is provided.

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