Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger
Reexamination Certificate
2000-02-08
2001-05-15
Scherbel, David A. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
C239S585100
Reexamination Certificate
active
06230983
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to rotating nozzle valve members, and more particularly to hydraulically actuated fuel injectors having rotating nozzle valve members.
BACKGROUND ART
In almost all fuel injectors, fuel spray to the combustion chamber is initiated by the movement of a nozzle valve member along a vertical centerline to open the nozzle outlet. When the desired amount of fuel has been injected, the nozzle valve member returns to its biased position, closing the nozzle outlet and ending fuel spray. The force that moves the nozzle valve member to open and close the nozzle outlet may be hydraulic, mechanical, or a combination of the these forces. While these nozzle valve members have performed adequately, there is room for improvement of nozzle valve members.
Specifically, engineers are always searching for ways to improve fuel injector performance and to reduce the likelihood that internal fuel injector components will fail. For instance, in the fuel injectors discussed above, there is a possibility for the injector tip to fail due to impact of the nozzle valve member with the injector body. While the probability of such an event is low, if an injector tip fails, the metal fragments can destroy an entire engine. Therefore, it would be desirable to develop a nozzle valve member that performed as well or better than previous nozzle valve members, while opening and closing the nozzle outlet in a without significantly impacting the injector tip.
The present invention is directed to overcoming one or more of the problems set forth above.
DISCLOSURE OF THE INVENTION
A fuel injector comprises an injector body that defines a high pressure passage and a nozzle outlet. The injector body includes a nozzle valve member that is positioned between the high pressure passage and the nozzle outlet. The nozzle valve member is rotatable between a closed position in which the nozzle outlet is blocked and an open position in which the nozzle outlet is open.
REFERENCES:
patent: 3626967 (1971-12-01), McCarthy
patent: 4326672 (1982-04-01), Goloff
patent: 4440134 (1984-04-01), Nakao et al.
patent: 4488476 (1984-12-01), Diel et al.
patent: 4658824 (1987-04-01), Scheibe
patent: 4962887 (1990-10-01), Matsuoka
patent: 4967796 (1990-11-01), Meyer
patent: 5058625 (1991-10-01), Kaiser et al.
patent: 5588412 (1996-12-01), Nozaki
patent: 5724926 (1998-03-01), Wilke
patent: 5901550 (1999-05-01), Bussing et al.
patent: 6050496 (2000-04-01), Hefler
patent: 6050497 (2000-04-01), Cotton
Caterpillar Inc.
Hwu Davis
McNeil Michael B.
Scherbel David A.
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