Fuel injection system electromagnetic-valve controlled type

Details Fuel injection system electromagnetic-valve controlled type Fuel injection system electromagnetic-valve controlled type

1988-04-05

1989-01-31

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123179L, F02M 3900

Patent

active

048008613

ABSTRACT:
In a fuel injection system for an engine, a first controller calculates circuit rotational angle of a crankshaft on the basis of reference pulses and scale pulses from a detector for detecting rotation of the crankshaft. The first controller outputs a drive pulse representative of a closing command moving an electromagnetic valve to a closed position, at a timing with reference to the current rotational angle, to control a period, within which the valve is in the closed position, during forward stroke of a plunger. A second controller intermittently outputs drive pulses representative of the closing command, at an initial stage of engine start-up, independently of the crankshaft rotational angle. A time duration of each drive pulse from the second controller is shorter than a time duration required for the plunger forward stroke, and a period within which each drive pulse is not outputted from the second controller is also shorter than the time duration required for the plunger forward stroke.

REFERENCES:
patent: 4395987 (1983-08-01), Kobayashi
patent: 4546749 (1985-10-01), Igashira
patent: 4586480 (1986-05-01), Kobayashi
patent: 4630588 (1986-12-01), Sagawa
patent: 4653452 (1987-03-01), Sawada
patent: 4681079 (1987-07-01), Kaneta
patent: 4683859 (1987-08-01), Tamura
patent: 4705004 (1987-11-01), Takahashi
patent: 4714068 (1987-12-01), Nagase

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