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Fuel Injection Control System

  • Thursday, 06 January 2022
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Fuel Injection Control System

A fuel injection control system is a computer-controlled system that controls the amount of fuel injected into the engine. The fuel injection control system has several components, including an ignition module and a metering unit. A typical fuel injection control system controls the rate of fuel injection based on the engine's speed and throttle position. The injectors receive fuel through a valve that is normally closed until the vehicle is moving, but opens up when the driver depresses the accelerator pedal.

An Electronic Control Unit (ECU) uses sensors to estimate the actions of fuel injectors. The engine's characteristics and the engine's RPM determine the time of the Fuel Injection System's pulse width. The metering unit also provides inputs to the ECU. These data are used to adjust fuel delivery. A metering unit enables the driver to monitor fuel delivery, ensuring that the correct amount of fuel is being injected.

The microcomputer 21 then sets the fuel injector timing to zero and samples the pressure in the common rail. The metering valve is associated with a group of fuel injectors. When the metering valve detects a low or high pressure in the accumulator, the controller may alter the mode of feedback control, which reduces the amount of fuel injected. Eventually, the metering valve will return to its original position, reducing the load on the electronic control unit.

Another function of the fuel injection control system is the diagnosis of fuel injector failure. The controller can detect the failure of a fuel injector by monitoring the current flowing through the switch devices SW1 to SW6. It can also set up a lean mixture for low-load conditions to improve fuel economy. The control system can also disable the injectors during deceleration. Once the diagnosis of the fuel injector has been confirmed, the process proceeds to step (S16).

The fuel delivery program is a three-dimensional map that directs the computer on how long to pulse the injectors. It may call for a richer fuel mixture under heavy load while a leaner one under light load. The program may also instruct the injectors to shut off when the engine is decelerating. Consequently, the control system is necessary to maintain optimal engine performance. A malfunctioning control system could cause the "Check Engine" Light to come on.

The fuel injection control system also plays a key role in diagnosing a problem. It can detect a malfunction by monitoring the speed of the engine and the angular position of the crankshaft. It may even detect a malfunction in the fuel injectors and adjust the engine's fuel pump's operation to compensate for it. Once the controller has determined this, it may then proceed to recalculate the engine speed.

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