Audi 80 Quiz
KE-III-Jetronic Injection System

Fuel mixture control unit

In this manual: KE-III-Jetronic Injection System
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

It is the main component of the injection system and consists of the air flow sensor and the fuel distributor. They work as follows:

The light metal air flow sensor plate is located in the center of the air flow drawn in by the engine. This control plate is lifted by the suction of the pistons on the intake stroke, the more air that passes the throttle valve, the more it lifts. Through a lever system, the deflection of the plate is transmitted to the fuel distributor.

The fuel distributor consists mainly of the metering plunger and the slide valve housing. For each engine cylinder, the slide valve housing has a slot through which fuel flows to the corresponding injection nozzle. The metering plunger opens or closes these slots to a greater or lesser extent and thus, depending on the position of the control plate, releases the corresponding amount of fuel.

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