Bosch D-Jetronic

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Mercedes-Benz: 250E, 280, 300, 350, 450Porsche: 914Saab: 99EVolkswagen: Type 3 & 4Volvo: 1800E, 1800ES, 142, 144, 164ECitro n: SM, DSBMW: (early types)Jaguar XJ-S, XJ12BOSCH D-JETRONICManifold Pressure Control system (MPC)DescriptionThe Bosch D-Jetronic electronic fuel injection system is composed of 3 majorsubsystems: the air intake system, the fuel system, and the electronic control system. TheD- jetronic system uses constant fuel pressure and flow, so that only injection durationneeds to be modified to control air/fuel mixture. The D-Jetronic system measuresincoming airflow by monitoring intake manifold pressure. Engine speed, temperature, andother factors are monitored for the purpose of fine-tuning injection duration. An auxiliaryair valve, cold start injector and thermotime switch aid in cold starting and systemAn electrically driven fuel pump forces fuel through a filter, into the main system.

Description The Bosch D-Jetronic electronic fuel injection system is composed of 3 major subsystems: the air intake system, the fuel system, and the electronic control system.

  Bosch, Jetronic