Solenoid valve and fuel injector for internal combustion engine

Details Solenoid valve and fuel injector for internal combustion engine Solenoid valve and fuel injector for internal combustion engine

1996-12-05

1998-11-24

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

239 96, 2395338, 251 36, 25112907, 25112916, F02M 4702

Patent

active

058396616

ABSTRACT:
A rapid-response solenoid-operated fuel injector for diesel engines is provided which includes a solenoid-operated valve member and a needle valve. The solenoid-operated valve member selectively establishes fluid communication between a fuel inlet and a fuel outlet. The needle valve is moved to selectively open and close a spray hole through which the fuel is sprayed. The solenoid-operated valve member is exposed at its head to the fuel pressure within a pressure control chamber supplied from the fuel inlet and has formed therein a pressure balancing chamber communicating with the pressure control chamber through a first orifice. The pressure of fuel within the pressure balancing chamber acting on the solenoid-operated valve member to block the fluid communication between the fuel inlet and outlet is balanced with the pressure of fuel within the pressure control chamber acting on the solenoid-operated valve member to establish the fluid communication between the fuel inlet and outlet. The pressure control chamber communicates with the fuel inlet through a second orifice which is smaller in diameter than the first orifice.

REFERENCES:
patent: 4856713 (1989-08-01), Burnett
patent: 5094215 (1992-03-01), Gustafson
patent: 5125575 (1992-06-01), Iwanaga
patent: 5671715 (1997-09-01), Tsuzuki

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