Fuel Injection System - LUCAS/BOSCH AFC: Description
The Lucas-Bosch Airflow Controlled (AFC) fuel injection system is an electronically controlled system operated by incoming airflow. The AFC fuel injection system also contains a feedback system which measures oxygen content of exhaust gases and maintains the air/fuel ratio at about 14.7:1.
The system consists of an electric fuel pump, fuel pressure regulator, fuel injectors, Electronic Control Unit (ECU), airflow meter, air temperature sensor, throttle switch, coolant temperature sensor, oxygen sensor, 3-way catalytic converter, and electrical relays. In addition, all models are equipped with a cold start system to aid in cold engine starts. The cold start system consists of an auxiliary air valve, cold start injector, and thermo time switch.
In addition, an over-run valve is fitted into each intake manifold. The valve opens during closed throttle conditions, to maintain a proper air/fuel ratio.