Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Patent
1984-09-17
1986-02-25
Moy, Magdalen Y. C.
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
123459, 123460, F02M 4504
Patent
active
045721246
ABSTRACT:
A fuel injection system for an internal combustion engine includes a high pressure injection pump which supplies fuel in timed relationship with an associated engine to an injection nozzle of the engine. A pilot injection device is included in the fuel circuit to the nozzle and includes a shuttle slidable in a cylinder with one end of the cylinder being connected to the pump and the other end to the nozzle. A spring biases the shuttle towards stop means at the one end of the cylinder. In the wall of the cylinder is a pair of spaced ports the first port communicating with a low pressure source and the second port with the pump. The shuttle has a pair of spaced grooves each communicating with the other end of the cylinder. In use, when the pump delivers fuel the shuttle starts to move and displaces fuel to the nozzle until the first groove communicates with the first port. While this communication is established no fuel is supplied to the nozzle and the pressure at the nozzle is reduced. During continued movement of the shuttle the aforesaid communication is broken and fuel supply to the nozzle is re-established, the shuttle continuing to move until the second groove communicates with the second port.
REFERENCES:
patent: 3387597 (1968-06-01), Wirsching
patent: 3438359 (1969-04-01), Thoma
patent: 3481315 (1969-12-01), Thornber
patent: 4289098 (1981-09-01), Norberg et al.
patent: 4389987 (1983-06-01), Frankle et al.
Lucas Industries Public Limited Company
Moy Magdalen Y. C.
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