[특허]Directly actuated injection valve

[미국특허] Directly actuated injection valve 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-041/00
출원번호	US-0522130 (2000-03-09)
발명자 / 주소	Welch Alan B.,CAX Rahardja Irawan,CAX Hebbes Mike,CAX
출원인 / 주소	Westport Research Inc., CAX
대리인 / 주소	McAndrews, Held & Malloy, Ltd.
인용정보	피인용 횟수 : 31 인용 특허 : 17

초록 ▼

A directly actuated injection valve comprises a hollow valve housing, a valve needle disposed within the hollow interior, a needle spring, an actuator assembly, and a hydraulic link assembly. The valve needle is movable between a closed position and an open position for governing the flow of fuel into the combustion chamber of an internal combustion engine. The displacement of the valve needle from the closed position is defined as the lift. The a needle spring biases the valve needle in the closed position. The actuator assembly generates an opening force that acts against the needle spring to open the valve. The hydraulic link assembly is interposed between the valve needle and the needle spring and the actuator assembly. The hydraulic link assembly transmits respective closing and opening forces to the valve needle. The hydraulic link preferably comprises a piston disposed within a cylinder that is filled with a hydraulic fluid. The opening and closing forces are transmitted through a thickness of the hydraulic fluid that is trapped between the planar surfaces of the piston and the head and base of the hydraulic cylinder. In the preferred embodiment, the thickness of the hydraulic fluid trapped between the piston and cylinder head or base is automatically adjustable in response to changes in the dimensional relationship between components of the injection valve to maintain a desired valve needle lift when the actuator assembly is activated. When the actuator assembly comprises a magnetostrictive or piezoelectric member, the movements of the valve needle can be controlled by the application of a shaped control pulse or waveform to improve the speed of the opening and closing motion of the valve needle, and to reduce the impact of the valve needle on the valve seat upon closing.

대표청구항 ▼

[ What is claimed is:] [1.]1. An injection valve for injecting fuel into a combustion chamber of an internal combustion engine, said injection valve comprising:(a) a valve housing comprising:a fuel inlet port;an interior chamber fluidly connected to said fuel inlet port;a nozzle comprising a nozzle orifice providing a fluid passage from said interior chamber to said combustion chamber;(b) a valve needle disposed within said valve housing wherein said valve needle is movable between a closed position at which a sealing end of said valve needle contacts a valve seat to fluidly seal said interior chamber from said nozzle orifice, and an open position at which said sealing end of said valve needle is spaced apart from said valve seat whereby said interior chamber is fluidly connected with said nozzle orifice, wherein valve needle lift equals the distance traveled by said sealing end away from said valve seat;(c) a needle sp ring associated with said valve needle, wherein said needle spring applies a closing force to said valve needle for biasing said valve needle in said closed position;(d) a n actuator assembly associated with said valve needle, wherein said actuator assembly may be activated to apply an opening force to said valve needle stronger than said closing force, for moving said valve needle to said open position; and(e) a hydraulic link assembly comprising a passive hydraulic link having a hydraulic fluid thickness through which said opening and closing forces are transmitted, whereby said hydraulic fluid acts substantially as a solid with said thickness being substantially constant while said actuator assembly is activated and wherein said thickness of said hydraulic link is adjustable while said actuator is not activated in response to changes in the dimensional relationship between components of said injection valve to maintain a desired valve needle lift upon activation of said actuator assembly.

이 특허에 인용된 특허 (17) 인용/피인용 타임라인 분석

Trzmiel Alfred,DEX, Actuating device, preferably for vehicles, especially for motor vehicles.
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Kappel Andreas,DEX ; Mock Randolf,DEX ; Meixner Hans,DEX, Apparatus and method for valve control.
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Kappel Andreas,DEX ; Mock Randolf,DEX ; Meixner Hans,DEX ; Hayes Edward-James, Apparatus and method for valve control.
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Waldman Donald John ; Lawrence Keith Edward ; Funke Steven James ; Lohmann Craig William, Direct operated check injector.
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Green, Christopher J.; Wallace, James S., Electrically actuated gaseous fuel timing and metering device.
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Clark Arthur E. (Adelphi MD), Magnetostrictive transducer.
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Trachte Dietrich (Sao Paulo BRX), Measuring valve for dosing liquids or gases.
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Auwaerter Gerhard (Stuttgart DEX) Itoh Katsuoki (Leonberg DEX) Heinz Rudolf (Renningen DEX) Moser Winfried (Ludwigsburg DEX) Franke Christoph (Wolfenbuttel DEX), Metering valve for metering a fluid.
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Schfer Hans-Jrgen (Braunschweig DEX), Metering valve, particularly fuel injection valve.
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Minoura Mikio (Obu JPX) Ito Shoji (Obu JPX), Method of controlling injector valve.
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Schmitz Guenter,DEX ; Pischinger Martin,DEX ; Goebel Thomas,NLX ; Schebitz Michael,DEX ; Schrey Ekkehard,DEX, Method of reducing the impact speed of an armature in an electromagnetic actuator.
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Takahashi Takeshi (Mishima JPX), Piezoelectric actuator.
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Schwerdt Paul (Freudenstadt DEX) Kirschenhofer Karl (Ulm DEX), Piezoelectric control valve for controlling fuel injection valve in internal-combustion engines.
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Hayes ; Jr. Edward James, Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke.
상세보기
Bart ; Hans U., Piezoelectric fuel injector valve.
상세보기
Bart Hans U. (Whitehall MI), Piezoelectric fuel injector valve.
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Huber Gerd,DEX, Servo valve for an injection nozzle.
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이 특허를 인용한 특허 (31) 인용/피인용 타임라인 분석

Gopalakrishnan, Suresh; Namuduri, Chandra S.; Nehl, Thomas Wolfgang; Omekanda, Avoki M., Actuator with deadbeat control.
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Mumford,David; Ancimer,Richard; Baker,Mike; Clapa,Damien; Wing,Richard, Common rail directly actuated fuel injection valve with a pressurized hydraulic transmission device and a method of operating same.
상세보기
Mumford, David; Welch, Alan; Touchette, Alain; Hebbes, Mike; Wing, Richard, Directly actuated valve with a strain-type actuator and a method of operating same.
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Coldren, Dana R., Dual check fuel injector and fuel system using same.
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Coldren, Dana Ray, Engine system having piezo actuated gas injector.
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Abe,Hidefumi, Fuel injection control device.
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Wing, Richard; Lockley, Ian; Oversby, Kevin, Fuel injection valve.
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Wager, David R.; McTaggart-Cowan, Gordon P.; Mumford, David K.; Munshi, Sandeep, Fuel injection valve and method of actuating.
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Boecking, Friedrich, Fuel injector with directly triggered injection valve member.
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Rauznitz,Peter; Buchanan,David L.; Peters,Lester L., Fuel injector with piezoelectric actuator preload.
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Boyer,Brad; Stockhausen,William, Injection strategy to maximize efficiency in gaseous engine.
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Salcedo, Sven Jaime; Knoller, Michael, Injection valve comprising a transmission unit.
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Salcedo, Sven Jaime; Knoller, Michael, Injection valve comprising a transmission unit.
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Hilger, Ulrich; Bartunek, Bernd, Internal combustion engine with injection of gaseous fuel.
상세보기
Hilger, Ulrich; Bartunek, Bernd; Oversby, Kevin Kwame; Lockley, Ian Hayden; Crawford, John Gordon; Mann, Kenneth R. C.; Wing, Richard, Internal combustion engine with injection of gaseous fuel.
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Czimmek, Perry Robert, Metallurgical and mechanical compensation of the temperature response of terbium-based rare-earth magnetostrictive alloys.
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Achleitner, Erwin; Baranowski, Dirk; Kunz, Franz, Method and device for metering a fluid.
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Zhang, Hong, Method for operating an injector of an injection system of an internal combustion engine.
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Crawford,John G.; Mann,Kenneth R. C., Method of injecting a gaseous fuel into an internal combustion engine.
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Mann,Kenneth R. C.; Crawford,John G., Method of injecting a gaseous fuel into an internal combustion engine.
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Schuerz, Willibald, Piezo common rail injector with hydraulic clearance compensation integrated into the servo valve.
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Weber, James R., Piezo solenoid actuator and valve using same.
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Rado, Gordon E., Piezoelectric actuated fuel injectors.
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Crofts, John D., Piezoelectric control valve adjustment method.
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Morris, Corydon E.; Doszpoly, Bela, Piezoelectric direct acting fuel injector with hydraulic link.
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Morris, Corydon E.; Doszpoly, Bela; Gant, Gary L., Piezoelectric direct acting fuel injector with hydraulic link.
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Venkataraghavan, Jayaramanaraman K.; Lewis, Stephen R.; Lakhapati, Shriprasad; Manubolu, Avinash R.; Bunni, Nadeem N., Stator assembly and fuel injector using same.
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Katsura, Ryo; Funai, Kenji; Yamada, Yutaka; Mizutani, Ken, Structure of fuel injector using piezoelectric actuator.
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Stucchi, Sergio; Ricco, Raffaele; De Michele, Onofrio; Gargano, Marcello; Lepore, Domenico; Altamura, Chiara, Three-way three-position control valve having a piezoelectric or magnetostrictive actuator, and fuel-injection system comprising the aforesaid valve.
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Ayanji, Sudhindra Keshav, Valve actuator assembly with current trim and fuel injector using same.
상세보기
Bright,Charles B.; Garza,Jon C., Very high speed rate shaping fuel injector.
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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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[미국특허] Directly actuated injection valve 원문보기