Fuel injection pump for internal combustion engines

Details Fuel injection pump for internal combustion engines Fuel injection pump for internal combustion engines

1985-04-22

1986-11-18

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123179L, 123449, F02M 3900

Patent

active

046229434

ABSTRACT:
A fuel injection pump is proposed, which is provided with a hydraulically operating injection adjuster device which is acted upon by a pressure which is determined by the feed pressure of a feed pump driven in synchronism with the fuel injection pump and by the control behavior of a pressure control valve. The pressure control valve has a piston controlling a relief line, and the piston is controllable by means of the pressure to be fed in, counter to the restoring force of a spring, and counter to a pressure controlled via a pressure maintenance valve and a switchable relief valve disposed parallel thereto. The valve is also connected to a device for adjusting the biasing of an idling spring of the governor of the fuel injection pump. With the increasing of the set pressure for the injection adjusting device upon closure of the valve, the biasing of the idling spring and thereby the idling rpm are both increased whenever the instant of injection is shifted toward "early" during starting and warmup.

REFERENCES:
patent: 4312312 (1982-01-01), Hofer
patent: 4387688 (1983-06-01), Eheim
patent: 4430974 (1984-02-01), Bofinger
patent: 4457284 (1984-07-01), Salzgeber
patent: 4489698 (1984-12-01), Hofer
patent: 4509470 (1985-04-01), Ito

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