Computers and Control Systems: Description and Operation

Feedback Carburetor (FBC) System:

The Feedback carburetor (FBC) system provides a positive air-fuel ratio control for maximum reduction of emissions. The Electronic Control Unit (ECU) receives signals from various sensors and then modulates two solenoid valves (FBSV, SCSV) installed on the carburetor to control the air-fuel ratio. The ECU also controls the ignition timing, electric choke, and throttle opener by switching on/off the related solenoid valves. For a more detailed description refer to COMPONENT OPERATIONS.