Internal-combustion engines – Charge forming device – With fuel pump
Patent
1982-09-27
1986-07-15
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
With fuel pump
123509, 239 87, 417380, F02M 3900
Patent
active
045999830
ABSTRACT:
Improved method and apparatus for injecting fuel for a diesel engine are disclosed which are constructed such that a push rod is disposed in a nozzle body and fuel is injected into a combustion chamber by actuating the push rod. The improvement of the invention consists in that push rod actuating force is accumulated for a certain period of time while the push rod is stationarily held by means of an electromagnetic coil which is energized. Fuel injection is thus carried out by releasing the accumulated force by way of deenergization of the electro-magnetic coil. In an embodiment of the invention push rod actuating force is extracted from a cam driving mechanism and a coil spring disposed between the cam driving mechanism and the push rod serves as a push rod actuating force accumulating means. In a modified embodiment of the invention push rod actuating force is extracted from a combination of an auxiliary piston and a rocker arm and an auxiliary cylinder serves as a push rod actuating force accumulating means. Preferably, an auxiliary electromagnetic coil is disposed on the nozzle body so as to assist in actuation of the push rod. In another modified embodiment of the invention similar to the preceding one a hydraulic system is provided between the auxiliary piston and the push rod as a push rod actuating force accumulating means.
REFERENCES:
patent: 1919286 (1933-07-01), Woolson
patent: 2703562 (1955-03-01), Seubert
patent: 2917034 (1959-12-01), Bessiere
patent: 3152584 (1964-10-01), Petroff
patent: 4427151 (1984-11-01), Trenne
Kabushiki Kaisha Komatsu Seisakusho
Miller Carl Stuart
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