1965-02-01

A New Servo-Operated Fuel Injection System for Diesel Engines 650432

A new fuel injection system has been developed to overcome the limitations of the existing mechanically operated jerk pump system. In the new system, a simple pump plunger is arranged next to the injection nozzle and is operated by a piston driven by fuel under pressure released from an accumulator. This arrangement permits control of injection conditions over wide ranges of engine speed and load.
Two forms of the new system have been developed, one for large engines and one for small engines. Their construction, development, and performance are described. The requirements of fuel injection systems are defined, and the extent to which the old and the new systems meet them is considered. It is concluded that the new systems will improve overall engine performance and will prove even more valuable as load and speed ranges are extended.

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