Fuel injection advance angle control apparatus

Details Fuel injection advance angle control apparatus Fuel injection advance angle control apparatus

1979-07-24

1982-10-19

Myhre, Charles J.

Internal-combustion engines

Charge forming device

With fuel pump

123501, 123179L, 417462, F02M 5932

Patent

active

043544746

ABSTRACT:
In a distribution type fuel injection system, the fuel injection advance angle, or the relative angular position at which fuel injection begins, is controlled by a first spring loaded piston (44). The spring force is opposed by pressurized fuel from a pump (14), the pressure increasing with engine speed. A second spring loaded piston (49) moves the first piston (44) to an advanced position for starting the engine and is retracted when the fuel pressure reaches a certain value to subsequently retard the advance angle in an idling speed range. The fuel pressure moves the first piston (44) to progressively advance the angle in a higher speed range. An electromagnetic valve (62) is controlled to trap fuel and apply a hydraulic lock to the second piston (49) during starting of the engine to prevent retarding of the advance angle until the engine speed or coolant temperature reaches a predetermined value.

REFERENCES:
patent: 2910975 (1959-11-01), Evans
patent: 3147746 (1964-09-01), Hofer
patent: 3815564 (1974-06-01), Suda
patent: 3943902 (1976-03-01), Skinner
patent: 4050453 (1977-09-01), Tokashiki
patent: 4122813 (1978-10-01), Barnert

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