Fuel injector with hydraulic flow control

Details Fuel injector with hydraulic flow control Fuel injector with hydraulic flow control

2007-07-31

2007-07-31

Ganey, Steven J. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

C239S533300, C239S533400, C239S584000, C123S299000

Reexamination Certificate

active

10813802

ABSTRACT:
A fuel injector incorporates a flow control into the needle valve and valve body to regulate fuel flow through the injector. The flow control defines an initial pilot fuel flow path that is closed by needle valve movement away from the nozzle seat. A primary fuel flow path requires axial movement of the needle valve through a mid-range position in which neither fuel flow paths are open. At low engine speeds, the needle valve is not driven through its mid-range position and closes prior to being driven to its fully open position, resulting in a pilot injection. At higher engine speeds, the needle valve is driven through its mid-range position eliminating a distinct pilot injection to provide only rate shaping.

REFERENCES:
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patent: 5397055 (1995-03-01), Paul et al.
patent: RE34999 (1995-07-01), Kelly
patent: 5647536 (1997-07-01), Yen et al.
patent: 5852997 (1998-12-01), Vanderpoel
patent: 5934570 (1999-08-01), Lambert
patent: 5947382 (1999-09-01), Kelly
patent: 6062498 (2000-05-01), Klopfer
patent: 6454189 (2002-09-01), Krishnamurthy
patent: 6526939 (2003-03-01), Reitz et al.
patent: 6557776 (2003-05-01), Carroll et al.
patent: 6568369 (2003-05-01), Desai et al.
SAE Technical Paper Series, No. 900349, “Modulation of Injection Rate to Improve Direct Injection Diesel Engine Noise” by M.F. Russell, C.D. Young and S.W. Nicol, Mar. 1990.

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