江铃陆风用4G6发动机（The 4G6 engine with Jiangling）.docVIP

江铃陆风用4G6发动机（The 4G6 engine with Jiangling） 1. Introduction by 4G63S4M, Jiangling 4G64S4M engine using the Delphi MT20 EFI system. The engine control module (ECM) by oxygen sensor, speed sensor, intake air temperature sensor input signal inlet absolute pressure sensor etc., according to the ECM interior design program to control the actuator, so as to realize the various working conditions of fuel injection and ignition control of gasoline engine. Multi point EFI system mainly consists of the following parts: ECM, ignition control system, idle speed control system, fuel supply system, evaporative emission pollution control and fault diagnosis. Multi-point sequential fuel injection The ECM controls the injector actuation time and injection timing, allowing the engine to obtain optimum concentrations of gas at various operating conditions. The inlet of each cylinder are equipped with a fuel injector, fuel pump, fuel tank will be sent to the fuel pump, fuel distribution pipe, fuel pressure regulator the injection pressure stable, fuel injector directly injected into each cylinder of the airway. In each cycle of the engine, the cylinders are injected once (1-3-4-2 in order of fuel injection). This method of injection is called sequential injection. When the engine is running in cold or under high load conditions, in order to maintain good performance, ECM open loop control, provide a richer mixture; when the engine is in normal working condition, the ECM signal through the oxygen sensor feedback, closed-loop control, in order to get the best air-fuel ratio, the three element catalytic to achieve the best purification efficiency of converter. Idle speed control According to the idle condition and the change of the engine load at idle speed, control the bypass air volume of the throttle to keep the idle speed at the best speed. Depending on the engine coolant temperature and the air conditioning load, the ECM drives the idle speed control motor (ISC) to operate the engine