The Engine Control Unit, in some cases alluded to as a PCM (Power-train Control Module), ECM (Engine Control Module), DME (Digital Motor Electronics), or DDE (Digital Diesel Electronics) is a gadget that oversees fuel volume, start timing and different components needed to keep an advanced motor running. The Engine Control Unit peruses values from multidimensional execution maps (for example Query tables), utilizing input esteems ECU, for example, motor speed which are determined with readings from an assortment of sensor gadgets checking motor action. Before, air/fuel combination, start timing and inactive speed were managed straight by mechanical sensors and actuators, dissimilar to the present motors which are primarily PC controlled. Air/Fuel Mixture In motors using fuel infusion frameworks, the Engine Control Unit (ECU) decides the amount of fuel to infuse dependent on a few distinct boundaries. At the point when the choke is pushed down, the choke body is opened permitting more air to stream into the motor, which brings about the ECU responding by infusing more fuel dependent on the expanded wind current. N the instance of a motor which hasn't been heated up, the ECU will infuse marginally more fuel making the motor run rich until it has appropriately heated up. Start Timing Motors require a flash to begin the ignition interaction inside the burning chamber. The ECU can minutely change the circumstance of the flash to advance both force yield and mileage, and on the off chance that it identifies any motor thump and concludes it is an immediate manifestation of the start timing settings, it will change as needs be to forestall it. Managing Idle Speed In most of motor frameworks, the ECU is additionally prepared to keep up with authority over inactive speed. A driving rod position sensor screens the motor RPM, and this sensor assumes a huge part in all parts of motor planning for fuel infusion, sparkle occasions and valve timing. Direct authority over inactive speed is dealt with by a programmable choke stop or inactive air sidestep stepper engine. To be successful, the heap out of gear should be precisely expected for appropriate control. Varieties in motor burden like HVAC frameworks, power directing, power brakes and the condition of the electrical frameworks all must be considered.