Fuel injection apparatus for internal combustion engines, in par

Details Fuel injection apparatus for internal combustion engines, in par Fuel injection apparatus for internal combustion engines, in par

1981-01-27

1983-06-14

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

123449, 123459, F02M 4102

Patent

active

043876862

ABSTRACT:
A fuel injection apparatus (FIG. 1) for internal combustion engines is proposed, in which the onset and end of injection are determined by means of a hydraulically actuated control slide. The injection pumps of the apparatus, preferably combined with an injection nozzle to make a pump
ozzle unit, have a central control fuel source represented by a supply pump and a first pressure limitation valve, which generates a control pressure (p.sub.S) actuating the control slide which is several times greater than the supply pressure (p.sub.V) determined by a second pressure limitation valve. In order to initiate the onset of injection, the control slide is placed under control pressure (p.sub.S) by a valve assembly via a distributor apparatus and closes an overflow channel leading out of the pump work chamber. In order to control the end of injection, the control slide during its return stroke again relieves this overflow channel toward a low-pressure line. The control pressure (p.sub.S) in the control pressure line required for actuating the stroke movement of the control slide is established by means of blocking the outflow out of this line by means of the valve assembly.

REFERENCES:
patent: 3011489 (1961-12-01), Bessiere
patent: 3358662 (1967-12-01), Kulke
patent: 3404668 (1968-10-01), Eheim et al.
patent: 3465737 (1969-09-01), Dreisin
patent: 3486493 (1969-12-01), Dreisin
patent: 3486494 (1969-12-01), Dreisin
patent: 3620647 (1971-11-01), Hofer et al.
patent: 3667438 (1972-06-01), Moulin et al.
patent: 3699939 (1972-10-01), Eckert et al.
patent: 3921604 (1975-11-01), Links
patent: 4249497 (1981-02-01), Eheim et al.

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