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1吉奥汽车GA4D28TC发动机起动时的控制策略吉奥汽车采用的GA4D28TC发动机为高压共轨柴油发动机,其在起动时的控制策略如下。(1)发动机起动时ECU需要知道的2个条件是,喷油正时与起动喷油量,同时共轨压力要达到25 MPa以上。(2)通过曲轴位置传感器与凸轮轴位置传感器的信号,ECU可以计算出当前的曲轴位置,系统判断出1缸上止点后,ECU向喷油器下达喷射指令。(3)起动时的喷油量要能够保证发动机快速起动,燃油燃烧的快慢除受起动时的燃烧室的压力影响之外,还受到温
1 Gio automobile GA4D28TC control strategy when starting the engine Gio automobile GA4D28TC engine used for high-pressure common rail diesel engine, its control strategy at start as follows. (1) The two conditions that the ECU needs to know when starting the engine are the injection timing and the starting fuel injection amount, and the common rail pressure should reach 25 MPa or more. (2) Through the signals of crankshaft position sensor and camshaft position sensor, the ECU can calculate the current crankshaft position. After the system judges that the upper dead center of cylinder 1, the ECU issues the injection command to the injector. (3) When starting the fuel injection quantity to be able to ensure the rapid start of the engine, the fuel combustion speed in addition to the start of the combustion chamber pressure, but also by the temperature