Engine Control Module The Working Principle Of
The engine control module, like the soul of an engine, controls the operation of the entire engine. Can to Control the Engine, you must have many Sensor (Sensor) to receive and deliver the Engine operation information, often have an Engine air intake temperature Sensor (IAT) Sensor, the throttle opening Sensor (TPS) Sensor, the manifold pressure Sensor (MAP) Sensor, water temperature sensors (ECT) Sensor, Crank Angle sensors (Crank Sensor), blasting earthquake known device (if Sensor), such as oxygen sensors (O2 Sensor) all kinds of status information to the Engine ECU (Engine Control Unit) for operation, after operation, the Engine operation information by ECU to each actuator (Reactor) Control signal to Control the actuator actuation, common actuator on Engine idle speed Control valve (IAC), fuel injection module, ignition module, EGR valve, VVT controller, charcoal canister (EEC) to take off the air valve, etc. Readers may see more dazzling, but so many sensors and so much of the actuator, in fact the main is to be calculated and the best fuel injection and ignition timing control engine, of course, some control is in order to comply with environmental laws and regulations, such as charcoal canister to take off the valve.
In the "control study", the so-called "open loop control" refers to the control mode of the controller according to the written control mode. "Closed loop control" is to add feedback signal to the control loop to modify the actuator's momentum. In the oil injection control system, the ECU is transmitted to the nozzle according to the operating condition of the engine at that time. Under the control of open loop, the oil injection instructions given to the nozzle by ECU will not be modified by the feedback signal. Under closed loop control, the fuel injection instruction will be modified by the feedback signal, and the source of the feedback signal is the oxygen sensor. Oxygen sensors will detect the oxygen content in the exhaust, and the oxygen signals sent to the ECU, the ECU is on the basis of oxygen and fuel injection quantity to calculate the actual air-fuel ratio, if detection of gas mixture is too loose (a/f ratio), the ECU will be fixed in the direction of the thick oil; If the mixture is too strong (empty combustion ratio is small), the ECU will modify the thin oil direction to allow the engine to operate in the best air-burning ratio. The engine will have the minimum fuel consumption.
When will the engine be in closed loop control and when will it be in the open loop control? In the normal operation condition, the engine is controlled by the closed loop, and when the throttle is in a large, rapid acceleration and cold vehicle state, the engine will go into the open loop state. Especially on the foot throttle, the engine is not only in the open loop state, but even into the oil injection thickened mode, so it must be more fuel consumption. The best way to save oil is to control your right foot