BOSCH Cis (Lambda) Fuel Injection: Description

The Bosch Continuous Injection System is a mechanical fuel injection system operated by incoming air flow. The Lambda system is a feedback control capable of measuring air/fuel ratios and correcting them constantly. The combination of the 2 systems makes it possible to obtain good economy and performance while minimizing exhaust emissions.

The system consists of the mixture control unit (air flow sensor and fuel distributor), control pressure regulator, auxiliary air valve, cold start valve, thermo-time switch, injector nozzles, fuel pump, filter, oxygen sensor, electronic control unit, frequency valve, and catalytic converter. Some models use additional components, such as a thermo-vacuum valve, hot start pulse relay, or a constant idle speed control system.