[특허]Valve control system with a variable timing hydraulic link

[미국특허] Valve control system with a variable timing hydraulic link 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01L-009/02 F01L-001/34
출원번호	US-0400705 (1989-08-30)
발명자 / 주소	Perr Julius P. (Columbus IN)
출원인 / 주소	Cummins Engine Company, Inc. (Columbus IN 02)
인용정보	피인용 횟수 : 24 인용 특허 : 10

초록 ▼

A valve tappet and control system is provided including expansible and collapsible hydraulic link; wherein the control system causes expansion of the hydraulic link and determines the timing of the collapse and thus the closing of an intake valve of an internal combustion engine. The timing is variable depending on engine operating conditions, such as output power and turbo charger boost pressure. In one embodiment, a rotary valve and fluid gating device is used to connect a pressure line used to expand the hydraulic link to a dump line at one instance during each cam shaft rotation to provide the early closing of the valve. In a second embodiment, a rotary cam follower with an oblique surface is used, wherein the orientations of the oblique surface is the determinative feature that is controlled to change early closing time as well as a delayed opening. A third embodiment utilizes a separate drain line from the hydraulic link that is opened by an electromagnetic solenoid controlled by a distributor system with a time variable adjustment.

대표청구항 ▼

A valve tappet mechanism and control system for use in an internal combustion engine comprising: a cam shaft including at least one lobe with a valve opening surface and a valve closing surface rotationally mountable within an internal combustion engine: a valve reciprocably slidable within an internal combustion engine; tappet means positioned between said cam shaft and said valve to open and close said valve in accordance with said valve opening and valve closing surfaces of said lobe, said tappet means including a cam follower and a piston connected by a hydraulic link means for providing an operational length to said tappet means with said hydraulic link means in an extended position and a collapsed length with said hydraulic link means collapsed, said cam follower operatively positioned to ride on said cam shaft, and said piston operatively connected to said valve; pressurization means for permitting supply and drainage of hydraulic fluid to and from said hydraulic link means, for expanding said hydraulic link means and said tappet means to said operational length and for collapsing said hydraulic link means and said tappet means to said collapsed length; timing control means for controlling said pressurization means to expand said tappet means to said operational length for at least a portion of the time that said cam follower rides on said valve opening surface and to collapse said hydraulic link means and said tappet means at an early closing time when said cam follower rides on said valve closing surface; variable means for determining said early closing time taking into account engine operating conditions; and an axial internal cavity within which said piston is axially slidable, an annular chamber at an inwardmost end of said internal cavity that is radially wider than said internal cavity, an axial groove on an external surface of said cam follower in communication with said fluid line, and an opening connecting said annular chamber to said axial groove, wherein said axial groove extends axially on said cam follower for a distance at least equal to a stroke distance of said tappet means. A valve tappet mechanism and control system for use in an internal combustion engine comprising: a cam shaft including at least one lobe with a valve opening surface and a valve closing surface rotationally mountable within an internal combustion engine: a valve reciprocably slidable within an internal combustion engine: tappet means positioned between said cam shaft and said valve to open and close said valve in accordance with said valve opening and valve closing surfaces of said lobe, said tappet means including a cam follower and a piston connected by a hydraulic link means for providing an operational length to said tappet means with said hydraulic link means in an extended position and a collapsed length with said hydraulic link means collapsed, said cam follower operatively positioned to ride on said cam shaft, and said piston operatively connected to said valve; pressurization means for permitting supply and drainage of hydraulic fluid to and from said hydraulic link means and for expanding said hydraulic link means and said tappet means to said operational length and collapsing said hydraulic link means and said tappet means to said collapsed length, said pressurization means including a fluid line in communication with said hydraulic link means; timing control means connected to said fluid line for controlling said pressurization means to expand said tappet means to said operational length for at least a portion of the time that said cam follower rides on said valve opening surface and to collapse said hydraulic link means and said tappet means at an early closing time when said cam follower rides on said valve closing surface, said timing control means including a fluid gating means for further connecting said fluid line to a dump line at said early closing time to collapse said hydraulic link means, said fluid gating means including a rotary valve means for coupling said fluid line and said dump line to permit fluid passage from said fluid line to said dump line; and variable means for determining said early closing time taking into account engine operating conditions.

이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

Nohira Hidetaka (Mishima JPX), Device for varying a valve timing and lift for an internal combustion engine.
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Babitzka Rudolf (Kirchberg DEX) Polach Wilhelm (Mglingen DEX) Schlagmller Walter (Schwieberdingen DEX), Electro-hydraulic valve control system for internal combustion engine valves.
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Trzoska Peter R. (Cologne DEX), Hydraulic tappet.
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Meistrick Zdenek S. (Bloomfield CT) Price Robert B. (Manchester CT), Hydro-mechanical overhead for internal combustion engine.
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Pruzan Daniel A. (845A Taughannock Blvd. Ithaca NY 14850), Internal combustion engine valve actuation system.
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Nelson Thomas E. (Anchorage KY), Liquid level indicating device.
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Linder Ernst (Mhlacker DEX) Rembold Helmut (Stuttgart DEX), Valve control arrangement.
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Rembold Helmut (Stuttgart DEX) Ruoff Manfred (Moeglingen DEX) Teegen Walter (Waiblingen DEX), Valve control arrangement for internal combustion engines with reciprocating pistons.
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Paul Marius A. (1100 E. Orangethorpe Ave. ; Ste. 140 Anaheim CA 92801) Paul Ana (1100 E. Orangethorpe Ave. ; Ste. 140 Anaheim CA 92801) Rotkoski Cristiana J. (1100 E. Orangethorpe Ave. ; Ste. 140 Ana, Valve control system for engines.
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Takizawa Masaaki (Mishima JPX) Takahashi Kazuo (Susono JPX) Matsubara Noboru (Susono JPX), Variable valve lift mechanism used in an internal combustion engine.
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이 특허를 인용한 특허 (24) 인용/피인용 타임라인 분석

Weber,James R.; Leman,Scott A.; Coleman,Gerald N.; Duffy,Kevin P.; Fluga,Eric C.; Kilkenny,Jonathan P.; Afjeh,Homa, Air and fuel supply system for a combustion engine.
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Coleman,Gerald N.; Duffy,Kevin P.; Faulkner,Stephen A.; Fluga,Eric C.; Kilkenny,Jonathan P.; Leman,Scott A.; Opris,Cornelius N.; Verkiel,Maarten; Weber,James R., Air and fuel supply system for combustion engine.
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Weber,James Richard; Leman,Scott A., Air and fuel supply system for combustion engine.
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Weber,James R.; Leman,Scott A.; Coleman,Gerald N.; Duffy,Kevin P.; Fluga,Eric C.; Kilkenny,Jonathan P., Combustion engine including cam phase-shifting.
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Weber,James R.; Leman,Scott A.; Coleman,Gerald N.; Duffy,Kevin P.; Fluga,Eric C.; Kilkenny,Jonathan P.; Pierpoint,David A., Combustion engine including fluidically-driven engine valve actuator.
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Michelsson, Detlef; Gerlach, Steffen; Jungmann, Bernd, Detecting defects by three-way die-to-die comparison with false majority determination.
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Peters Lester L. ; Vittorio David A. ; Free P. Douglas ; Ghuman Amarjit S. ; Weber Harold G. ; Nelson Canden R., Early exhaust valve opening control system and method.
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Warner Oliver Allen, Engine compression brake system.
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Yager, James H.; Lei, Ning, Hydraulic actuator cartridge for a valve.
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Strickler,Scott L.; Mathews,Will W., Hydraulic valve actuation system with valve lash adjustment.
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Friedrich Boecking DE, Internal combustion engine.
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Bryant, Clyde C., Internal combustion engine and working cycle.
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Bryant,Clyde C., Internal combustion engine and working cycle.
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Bryant,Clyde C., Internal combustion engine and working cycle.
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Borean, Fabio; Puccio, Mitzi, Internal-combustion engine with an electronically controlled hydraulic system for actuation of the valves and means for compensating changes in the operating conditions of the hydraulic.
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Macor Lorentino,ITX ; Pecori Andrea,ITX, Multi-cylinder diesel engine with variable valve actuation.
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Xie, Zongfa, Oil control device for fully variable hydraulic valve system of internal combustion engine.
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Lucas Michael A. ; Hammoud Chafic M., Pin-within-a-sleeve three-way solenoid valve with side load reduction.
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Simpson,Roger T., Pivoting lifter control system using spool valve and check valve to recirculate oil.
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Watson, John P.; de Ojeda, William, Poppet valve actuator.
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Vorih Joseph ; Hu Haoran, System and method for controlling the amount of lost motion between an engine valve and a valve actuation means.
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de Ojeda, William, Unit trigger actuator.
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Buglioni, Gianluigi, Valves for i.c. engines with variable lifts and timings.
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Riley Michael B, Variable valve apparatus.
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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

[미국특허] Valve control system with a variable timing hydraulic link 원문보기

초록 ▼

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이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (24) 인용/피인용 타임라인 분석

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[미국특허] Valve control system with a variable timing hydraulic link 원문보기

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이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (24) 인용/피인용 타임라인 분석

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