Method and apparatus for controlling fuel injection timing

Details Method and apparatus for controlling fuel injection timing Method and apparatus for controlling fuel injection timing

1984-09-20

1987-04-14

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Fuel injection system

123357, 123500, 73119A, F02M 3900

Patent

active

046569901

ABSTRACT:
An apparatus for controlling fuel injection timing, for use in a fuel injection pump of a diesel engine, comprises a toothed wheel coaxially and fixedly mounted on a drive shaft of the fuel injection pump, first and second detectors for detecting the rotational position of the tooth wheel, and a control unit, having a microcomputer, for actuating a fuel injection timing changer of the pump according to the phase difference between signals from the first and second rotational position detectors for controlling fuel injection timing. The first rotational position detector is fixedly mounted on a pump housing and the second rotational position detector is fixedly mounted on a member rotatably provided around the drive shaft of the pump. The member is generally used for converting the rotational movement of the drive shaft to the reciprocation of a plunger of the pump which supplies fuel into cylinders of the engine. The phase difference corresponds to the actual injection timing condition. Therefore, the control unit actuates the injection timing changer so that the phase difference is approached to a desired phase difference predetermined according to the engine condition.

REFERENCES:
patent: 4258324 (1981-03-01), Henrich
patent: 4348895 (1982-09-01), Straubel
patent: 4359032 (1982-11-01), Ohie
patent: 4435128 (1984-03-01), Frey
patent: 4475519 (1984-10-01), Eheim

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