Hybrid Electric Vehicle Training Educator

Electric Control Module


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The electronic control module (ECM) is one of the main computers that manages the information necessary for the gasoline engine /internal combustion engine (ICE) to function properly. The ECM is in constant communication with other computers that work with the hybrid powertrain to propel the vehicle. An example of an ECM function includes managing the ignition system so that the ignition coils deliver energy to the spark plugs. The ECM also controls the fuel injectors and all other sensors required for proper operation of the ICE.

The ECM optimally controls the sequential fuel injection (SFI), the electronic spark advance (ESA), and the electronic throttle control system-intelligent (ETCS-i) to suit the operating conditions of the engine in accordance with the signals provided by sensors.

ETCS-i
The ETCS-i optimally controls the throttle valve opening in accordance with the accelerator pedal position and the conditions of the engine and the vehicle.

Variable Valve Timing-intelligent (VVT-i)
The VVT-i controls the intake camshaft to an optimal valve timing in accordance with the engine operating condition.

Cooling Fan Control
Cooling fan operation is controlled by signals from the ECM based on the engine coolant temperature, inverter water temperature, and the air conditioning (A/C) operating condition.

Water Pump Control
The water pump operation is controlled by signals from the ECM.

Fuel Pump Control
Fuel pump operation is controlled by signals from the ECM. The fuel pump stops when the supplemental restraint system (SRS) airbags deploy.

© 2012 National Alternative Fuels Training Consortium.

Electric Control Module

Electric Control Module