[특허]Piston and barrell assembly with stepped top and hydraulically-actuated fuel injector utilizing same

Piston and barrell assembly with stepped top and hydraulically-actuated fuel injector utilizing same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-007/00 F15B-015/22
출원번호	US-0768014 (1996-12-13)
발명자 / 주소	Chen Shikui K. Hefler Gregory W.
출원인 / 주소	Caterpillar Inc.
대리인 / 주소	Liell & McNeil
인용정보	피인용 횟수 : 32 인용 특허 : 0

초록 ▼

A hydraulically-actuated piston and barrel assembly includes a barrel defining an actuation fluid cavity and a piston bore, which includes an upper bore and a lower bore. A stepped piston is slidably received in the piston bore and moveable between a retracted position and an advanced position. The stepped top of the piston includes a first area that is separate from a second area. The first area and the upper bore define an upper cavity connected to the actuation fluid cavity through a relatively unrestricted flow area, when the piston is in its retracted position. The second area and the lower bore define a lower cavity connected to the actuation fluid cavity through a relatively restricted flow area when the piston is in its retracted position. The first area is exposed to fluid pressure in the upper cavity and the second area is exposed to fluid pressure in the lower cavity over a portion of the piston's movement from its retracted position toward its advanced position. One of the piston or the barrel, or both, further define a restricted passage that includes a restricted flow area connecting the actuation fluid cavity to the lower cavity. The disclosure also includes a description of a hydraulically-actuated fuel injector that incorporates the piston and barrel assembly described above.

대표청구항 ▼

[ We claim:] [1.] A hydraulically actuated piston and barrel assembly comprising:a barrel defining an actuation fluid cavity and a piston bore, which includes an upper bore and a lower bore;a piston with a stepped top being slidably received in said piston bore and moveable between a retracted position and an advanced position;said stepped top of said piston including a first area that is separate from a second area;said first area and said upper bore defining an upper cavity connected to said actuation fluid cavity through a relatively unrestricted flow area when said piston is in said retracted position;said second area and said lower bore defining a lower cavity connected to said actuation fluid cavity through a relatively restricted flow area when said piston is in said retracted position;said first area being exposed to fluid pressure in said upper cavity and said second area being exposed to fluid pressure in said lower cavity when said piston begins moving from said retracted position toward said advanced position; andone of said piston or said barrel further defining a restricted passage connecting said actuation fluid cavity to said lower cavity, and said restricted passage includes said restricted flow area.

이 특허를 인용한 특허 (32)

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Sturman, Oded Eddie, Digital fuel injector, injection and hydraulic valve actuation module and engine and high pressure pump methods and apparatus.
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Pena,James A.; Kiss,Tibor, Direct needle control fuel injectors and methods.
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Cowden Gary L. ; Davis Errol W. ; McGee Brian G. ; Puckett Daniel R. ; Schulman Matthew E. ; Timmons John P., Electronic control for a hydraulically activated, electronically controlled injector fuel system and method for operating same.
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Rose Nigel Eric,AUX ITX 4213, Fluid actuated engines and engine mechanisms.
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Boecking, Friedrich, Fuel injection device for internal combustion engines.
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Niethammer Bernd,DEX ; Lenk Martin,DEX ; Martin Steffen,DEX, Fuel injection device for internal combustion engines.
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Matz, Katja; Schmidt, Uwe; Greif, Hubert, Fuel injection system for an internal combustion engine.
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Shinogle,Ronald D., Fuel injection system including two common rails for injecting fuel at two independently controlled pressures.
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Shafer, Scott F.; Tian, Ye, Fuel injector having a hydraulically actuated control valve and hydraulic system using same.
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Lei Ning ; Yang Xilin ; Thuente John F., Fuel injector with actuation pressure delay device.
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Liu, Zhengbai; Gui, Xinqun; Wei, Puning, Governor plate apparatus.
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Hayatani, Masahiko; Usui, Satoshi; Machimura, Hideki; Kawano, Tatsuo; Aritomi, Syunsuke; Tamura, Shingo, High-pressure fuel supply pump including an electromagnetically driven intake valve.
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Scott F. Shafer, Hydraulically actuated fuel injector including a pilot operated spool valve assembly and hydraulic system using same.
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Chetan J. Desai ; Xinshuang Nan, Hydraulically-actuated fuel injector having front end rate shaping capabilities and fuel injection system using same.
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Manas R. Satapathy, Hydraulically-actuated fuel injector with enhanced peak injection pressure and stepped top intensifier.
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Sturman, Oded Eddie, Methods of operation of fuel injectors with intensified fuel storage.
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Sturman,Oded E., Multi-stage intensifiers adapted for pressurized fluid injectors.
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Sturman, Oded Eddie, Multiple intensifier injectors with positive needle control and methods of injection.
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Sturman, Oded Eddie, Multiple intensifier injectors with positive needle control and methods of injection.
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Tian Steven Y., Pilot actuator and spool valve assembly.
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Gregory W. Hefler ; Shikui K. Chen, Piston and barrel assembly with stepped top and hydraulically-actuated fuel injector utilizing same.
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Hefler, Gregory W.; Chen, Shikui K., Piston and barrel assembly with stepped top and hydraulically-actuated fuel injector utilizing same.
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Coldren,Dana R.; Ibrahim,Daniel R., Single fluid injector with rate shaping capability.
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Coldren, Dana R., Two stage intensifier.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Piston and barrell assembly with stepped top and hydraulically-actuated fuel injector utilizing same 원문보기

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Piston and barrell assembly with stepped top and hydraulically-actuated fuel injector utilizing same 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (32)

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