Fuel Injection System - BOSCH AFC: Description
NOTE:
The Bosch AFC (L-Jetronic) Fuel Injection system is used on all models; however, variations may exist between model applications. This article covers the Bosch AFC system in general, with manufacturers' differences noted under SPECIAL FEATURES.
The 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 fuel injection system consists of an electric fuel pump, fuel pressure regulator, fuel damper, fuel injectors, Electronic Control Unit (ECU), and airflow meter. In addition, an air temperature sensor, throttle switch, coolant temperature sensor, oxygen sensor, catalytic converter, auxiliary air valve, idle speed control valve, throttle body, and electrical relays are used.
NOTE:
Only primary sub-systems which affect fuel system operation will be covered. For more information, see FUEL INJ SYSTEM - MPFI
article in the COMPUTER ENGINE CONTROLS section.