Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-06-25
1983-04-05
Lazarus, Ira S.
Internal-combustion engines
Charge forming device
Fuel injection system
123501, 123446, F02M 3900
Patent
active
043787754
ABSTRACT:
In the method according to the invention, the inlet pressure and the inlet cross section of the fuel pre-stored in the pump work chamber is constant, and it is solely the opening duration of an inlet valve which is electrically regulated. In addition, a shift in the instant of supply onset controlled in accordance with operating characteristics is attained by means of a variation in the return-flow fuel quantity. A shift in the instant of supply onset, which is undesired when there is a change in the quantity of fuel to be injected, is prevented by means of a simultaneously-effected correction of the return-flow fuel quantity. A fuel injection apparatus suitable for performing the method has, as the inlet valve, a magnetic valve which determines the quantity of fuel pre-stored in the pump work chamber. The rotary position of the pump piston is variable in order to shift or correct the instant of supply onset by means of an adjacent device actuated by an electromechanical adjustment element. An electric control device emitting the metering pulse and a control pulse is connected with a set-point transducer and an adjustment-path transducer of the adjustment device. The apparatus can be equipped with either a pump
ozzle or a normal piston injection pump supplying the injection nozzle via a pressure line, or with a distributor injection pump.
REFERENCES:
patent: 3709639 (1973-01-01), Suda et al.
patent: 3724436 (1973-03-01), Nagata et al.
patent: 3796206 (1974-03-01), Links
patent: 3815564 (1974-06-01), Suda et al.
patent: 4280464 (1981-07-01), Kanai et al.
patent: 4306528 (1981-12-01), Straubel et al.
Eisele Hermann
Straubel Max
Vogel Wilhelm
Zimmermann Klaus-Dieter
Greigg Edwin E.
Lazarus Ira S.
Moy Magdalen
Robert & Bosch GmbH
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