Engine control unit (ECU) is an electronic control unit that ensures the optimal work of an internal combustion engine. It controls fuel supply and injection, fuel-to-air ratio, ignition, idle speed, and the timing of valve opening and closing. Modern ECUs also include cruise control, anti-skid brake control, and other features.
All of this is important to ensure that the engine is working efficiently and the amount of emissions is as low as possible. To do this, the ECU receives input from several sensors that help it determine the right way of action. These sensors usually include temperature and pressure sensors, accelerator pedal position sensor, anti-lock braking system module and other modules within the vehicle.
A modern car can’t function without an ECU. Because of this, it is important to keep an eye out for problems that might be related to the ECU. The first sign is a flashing Check Engine Light. Other symptoms include loss of power when accelerating, difficulty starting and emitting clear smoke. These problems need to be checked by a specialist to determine the source of the problem and fix it.
Synonym(s):
- Engine control module (ECM)
