Gray system theory-based method for actively controlling fuel injection of internal combustion engine

Abstract

The invention provides a grey system theory-based method for actively controlling the fuel charge of an internal combustion engine, belonging to the technical field of fuel injection system control of the internal combustion engine. The method comprises the following steps: 1.1 regularly and continuously sampling cooling water temperature T(0)(k) of the internal combustion engine under a running work state, air inlet temperature t(0)(k) of the internal combustion engine, the rotating speed n(0)(k) of the throttle internal combustion engine and the air-fuel ratio lambda(0)(k) of the internal combustion engine; and 1.2 taking the initialized basic injection time mu'(0)(k) as a reference sequence of grey association analysis, carrying out grey association analysis on the initialized parameters, and eliminating factors which are not in accordance with the association degree according to the grey association degree to acquire a factor sequence qi(0)(k) of each internal combustion engine affecting the injection time, and preparing for reducing the processing strength of the micro-processing unit and grey model construction; carrying out active forecast on the best injection time by applying the grey system theory so as to shorten the action time for fuel injection control of the micro-processing unit, improve the dynamic following performance, and simultaneously reduce the working strength of the micro-processing unit.

Description

technical field [0001] The invention relates to an active control method of fuel injection quantity of an internal combustion engine based on gray system prediction theory, belonging to the technical field of fuel injection system control of an internal combustion engine. Background technique [0002] The fuel injection and ignition system of the internal combustion engine is relatively complex, with many influencing factors, difficult modeling and low modeling accuracy. After searching and investigation, the current control methods and theories for fuel injection volume are all open-loop based on classical and modern control theories. , closed-loop and optimal adaptive control, that is, to establish a digital model of the automotive engine system control, and then use the corresponding control method (such as look-up table) to optimize the control. The most common working condition in fuel injection control is operation control. In this working condition, the fuel injection...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an active control method for the fuel injection quantity of the internal combustion engine based on the gray system prediction theory in view of some imperfections in the existing internal combustion engine fuel injection quantity control method

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