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Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed and marketed electronic fuel injection pdf Robert Bosch GmbH...

Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed and marketed electronic fuel injection pdf Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers.


There are several variations of the technology offering technological development and refinement. Originally, this system was called Jetronic, but the name D-Jetronic was later created as a retronym to distinguish it from newer versions. The volume of air taken in by the engine is measured to determine the amount of fuel to inject. This system has no lambda loop or lambda control.

K-Jetronic debuted in the 1973. The final car to use K-Jetronic was the 1994 Porsche 911 Turbo 3. Fuel is pumped from the tank to a large control valve called a fuel distributor, which divides the single fuel supply line from the tank into smaller lines, one for each injector. The fuel distributor is mounted atop a control vane through which all intake air must pass, and the system works by varying fuel volume supplied to the injectors based on the angle of the air vane in the air flow meter, which in turn is determined by the volume of air passing the vane, and by the control pressure.

A variant of K-Jetronic with closed-loop lambda control, also named Ku-Jetronic, the letter u denominating USA. The system was developed to comply with U.

California’s California Air Resources Board exhaust emission regulations, and later replaced by KE-Jetronic. First introduced in the Volvo 265 in 1976.

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