ELECTRONIC CONTROL SYSTEM FOR INTAKE PRESSURE OF GASOLINE ENGINE AND SYNCHRONOUS PRECISE CONTROL METHOD THEREFOR

摘要

An electronic control system for the intake pressure of a gasoline engine. The electronic control system comprises a carburetor (1) provided with a main air passage (101), an idle-speed air passage (102) and at least one auxiliary air passage (103), an intake control valve (104) being arranged on the auxiliary air passage (103). The electronic control system further comprises a temperature sensor (2) used for detecting the cylinder temperature of the gasoline engine; an oxygen sensor (3) used for detecting the oxygen content in exhaust gas of the gasoline engine; a pulse trigger (4) used for detecting the rotating speed of the gasoline engine; and a controller (5) used for controlling the intake moment and duration of the intake control valve (104) according to signals acquired by the temperature sensor (2), the oxygen sensor (3) and the pulse trigger (4). Also provided is a synchronous control method for the electronic control system for the intake pressure of the gasoline engine. According to the electronic control system for the intake pressure of the gasoline engine and the synchronous control method therefor, by acquiring an oxygen content signal and a rotating speed signal of the gasoline engine and performing judgment and calculation, the intake moment and intake duration of the intake control valve of the auxiliary air passage are synchronously controlled in the intake stroke of the gasoline engine, so that the intake amount of the auxiliary air passage can be precisely controlled, precise control over the intake negative pressure of the main air passage is realized, and the purpose of precisely controlling the air-fuel ratio is achieved.