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1 电控燃油喷射系统的组成及控制电路沈阳金杯海狮客车装用的电控发动机主要有国产的491Q-E型和日本产丰田2RZ-E型2种。其中,491Q-E型发动机采用意大利NARELI公司生产的I.A.W.16C4型电控单点间歇式燃油喷射(SPI)系统(图1)。ECU根据氧传感器、上止点位置-发动机转速传感器、进气温度传感器、进气歧管绝对压力传感器、冷却液温度传感器及节气门位置传感器等的输入信号,按照ECU内部的预设程序控制喷油器、点火线圈及怠速步进电动机等执行器的工作,从而实现对发动机供油、点火及怠速转速的控制。该系统的控制电路
1 electronic fuel injection system components and control circuit Shenyang Jinbei sea lion passenger car installed with electric control engine mainly made 491Q-E-type and Japan-made Toyota 2RZ-E-2. Which, 491Q-E-type engine produced by the Italian company NARELI I.A.W.16C4 type electric single-point intermittent fuel injection (SPI) system (Figure 1). ECU according to the oxygen sensor, the top dead center position - the engine speed sensor, intake temperature sensor, intake manifold absolute pressure sensor, coolant temperature sensor and throttle position sensor input signal, according to the ECU internal pre-programmed control spray Oil cooler, ignition coil and idle stepper motor and other actuators to achieve the engine oil, ignition and idle speed control. The system’s control circuit