So, the working state of the engine is a closed loop control, and here are a few simple examples: ECU by setting the working law of the engine, MAP. Then add the oxygen sensor in the exhaust pipe, judge the operating state of the engine by oxygen sensor, oil and more or less in the cylinder; adding knock sensor, ignition timing is judged ahead or delayed; join at the outlet water temperature sensor can determine the engine combustion chamber temperature is normal to correct the amount of oil, protect the engine and so on. These basic data are sent to the ECU via a wire harness, and the ECU constantly adjusts fuel injection and ignition timing based on their feedback.
Electronic controlled engine control system is composed of three parts, namely the Sensor sensor and the electronic control unit ECU and actuator, in which the ECU bear "brain" role, from the use of the special microcomputer controller of engine. Like ordinary computers, it consists of microprocessors (CPU), memory (ROM, RAM), input / output interface (I/O), analog to digital converter (A/D), and large scale integrated circuits such as shaping and driving.
The full name is: Engine Control ECM engine Module, the engine control module; in general, the current industry is usually referred to as "ECU": Electronic Control Unit, the electronic control unit, daily life is also popularly called "the driving computer", "computer plate engine" and "on-board computer". It is in the engine before leaving the factory, are a series of pre storage through the basic data and control strategy of calculation and experiment, we called "MAP".
