Fuel Injection - LUCAS Electronic Fuel Injection: Description

Lucas Manifold Pressure Controlled (MPC) fuel injection system is a pulsed, port injection system with one injector per cylinder. The amount of fuel injected depends upon engine load, speed and atmospheric pressure. Manifold Pressure Control (MPC) regulator measures the amount of pressure differential in the intake manifold and transmits an electric signal to Electronic Control Unit (ECU). This signal modifies all other signals sent to ECU by the other sensors.

The ECU electronically analyzes all sensor information and transmits a signal to the injectors, which determines the amount of time each injector will be open. This Bosch electronic injection system consists of three sub-assemblies; fuel delivery, air induction system, and electronic sensing and control.

Major components of fuel delivery system include: fuel vibration damper, fuel pump, change-over valves, fuel rails, injectors, fuel pressure regulator, fuel cooler and fuel filter. Major components of the electronic sensing and control system are: ECU, power amplifier, thermo-time switch, incoming air and engine coolant temperature sensors, cold start injector valve, MPC sensor, throttle switch, distributor trigger unit, main relay, and pump relay.