Engine control unit(ECU)
Engine Control Unit(ECU)
It is the brain of engine that control all the functioning of the engine.lt serve several function which include regulating and maintaining the amount of fuel and air in the fuel injection part and help in increasing
Horsepower of the engine.
It is the brain of engine that control all the functioning of the engine.lt serve several function which include regulating and maintaining the amount of fuel and air in the fuel injection part and help in increasing
Horsepower of the engine.
Working of ECU
Engine control unit is the integral of Electronic fuel injection.Electronic fuel injection can be divided into subsystem namely Air Induction system,fuel delivery system and the electronic control systems and from here the function of the ECU.
The electronic control system of an EFI is where you will find the ECU. Aside from the ECU, this is also where you will find various sensors, fuel injector assemblies and any related fuel injection wiring.
Functions of fuel injection ECU system
A fuel injection ECU system has several functions. Probably one of the most important function of the ECU is it controls the fuel mixture used by the engine. The Engine Control Unit or ECU determines the amount of fuel that should be injected into engine. This computer program receives several data and computes them to come up with the appropriate amount. The ECU of an Electronic Fuel Injection also determines when is the right time to deliver the air and fuel ratio to the engine. This process is called injection duration or injection pulse width. Most cars also have a built in control system in their ECU for idle speed. Idle speed is controlled through the programmable throttle stop. Aside from idle speed, an ECU controls the ignition timing of an engine. This is done by adjusting the time when the spark ignition plug should be sparked, resulting in better power.
The ECU system also controls the variable valve timing. This simply means that it controls when the valves will open. This is done to increase performance and power of the car since the flow of air into the cylinder is maximized.
Based on the data gathered by the ECU sensors, it can basically control the engine's speed, coolant temperature, throttle angle and exhaust oxygen content.
System operation of a fuel injection ECU system
A fuel injection ECU works by pulsing or controlling the fuel injectors in the engine. This is done by switching the injector ground circuit on or off depending on what is required by the engine. If the injector ground circuit is turned on the fuel is sprayed at the back of the intake valve.
When the fuel is sprayed, it mixes with the air. Due to the low pressures in the intake manifold, the fuel and air mixture then vaporizes. This is where the fuel injection ECU sensor works. It gives a signal to the ECU to provide the right air and fuel ratio. The ratio of air and fuel mixture is determined by the volume of air taken in by the engine and the engine's rpm. The sensors also provide the ECU with several other data including workload, exhaust gas composition as well as engine and ambient temperatures. All of these data gathered by the ECU sensor determines the amount of fuel needed to be injected and mixed with the incoming air.
Functioning of ECU.
1.controlling the air -fuel mixture.
2.controlling the ignition timing.
3.controlling on Idle speed and variable value timing.
4.ECU also increase the torque and BHP
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