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Electronic Engine Controls - Description & Operation: Introduction

The V8 4.2 Liter naturally aspirated engine is controlled by an engine control module (ECM) manufactured by DENSO. The Engine Management System (EMS) controls the following:

The engine control module (ECM) controls the engine fueling by providing sequential fuel injection to all cylinders. Ignition is controlled by a direct ignition system, provided by eight plug top coils. The engine control module (ECM) is able to detect and correct for ignition knock on each cylinder and adjust the ignition timing for each cylinder to achieve optimum performance.

The engine control module (ECM) uses a torque-based strategy to generate the torque required by the driver and other vehicle control modules. The EMS uses various sensors to determine the torque required from the engine. The EMS also interfaces with other vehicle electronic control modules's, via the controller area network (CAN) bus, to obtain additional information (e.g. road speed from the anti-lock brake system (ABS) control module). The EMS processes these signals and decides how much torque to generate. Torque is then generated by using various actuators to supply air, fuel and spark to the engine (electronic throttle, injectors, coils, etc.).

The EMS comprises the following inputs:

The EMS comprises the following outputs:



The V8 4.2 Liter naturally aspirated engine is controlled by an electronic Engine Management System (EMS). The EMS controls the following:

The ECM controls the engine fueling by providing sequential fuel injection to all cylinders. Ignition is controlled by a direct ignition system, provided by eight plug top coils. The ECM is able to detect and correct for ignition knock on each cylinder and adjust the ignition timing for each cylinder to achieve optimum performance.

The ECM uses a torque-based strategy to generate the torque required by the driver and other vehicle control modules. The EMS uses various sensors to determine the torque required from the engine. The EMS also interfaces with other vehicle electronic control modules's, via the CAN bus, to obtain additional information (e.g. road speed from the ABS control module). The EMS processes these signals and decides how much torque to generate. Torque is then generated by using various actuators to supply air, fuel and spark to the engine (electronic throttle, injectors, coils, etc.).

The EMS comprises the following inputs:

The EMS comprises the following outputs:

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