Description & Operation

The Bosch Continuous Injection System (CIS) is a mechanically operated system. It injects fuel to each cylinder in amounts determined by the volume of air flow through the air intake system. Intake air required by the engine is metered by an air flow sensor located in the air inlet. Sensor is activated by a circular plate attached to an arm and pivot assembly which is extremely sensitive to air flow. This sensor plate is raised or lowered by the incoming flow of air, and in turn, raises or lowers a plunger in the fuel distributor. This plunger acts to increase or decrease amount of fuel to be injected at each cylinder. See Figure.

Main components of the CI System are: Control Pressure Regulator, Air Sensor, Fuel Distributor, Thermo-Time Switch, Auxiliary Air Regulator, Cold Start Valve and Injectors, Electric Fuel Pump, Fuel Accumulator, Auxiliary Air Valve and a hot start pulse relay.