Heinrich Knapp

Present Status and Future Development of Gasoline Fuel Injection Systems for Passenger Cars

After a review on history, market, physical facts of fuel injection follows a short description of present systems. Influences on fuel consumption and emissions, including Lambda-control, are described. Some notes are given on the influence of injuction timing, single point injection, combination of fuel injection and ignition to a digital motor electronics. New development trends for less expensive and more effective systems are shown.

A NEW LOW PRESSURE SINGLE POINT GASOLINE INJECTION SYSTEM

The paper describes the second generation of Bosch single point injection systems. It is a low cost system and specifically designed for closed loop control. The system uses a fuel pressure of 1 bar (14.5 psi) and will apply throttle angle/engine speed control. This type of control was already used in the very beginning of the fuel injection era but is not updated by closed loop and adaptive memory control. The throttle body, completely new designed as a module for most installation requirements, as well as characteristics of other new components such as ball type injector, throttle valve potentiometer and electric fuel pump are described.