IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0263799
(2002-10-04)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Finnegan, Henderson, Farabow, Garrett &
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인용정보 |
피인용 횟수 :
3 인용 특허 :
36 |
초록
▼
An engine valve actuator for an internal combustion engine is provided. The engine valve actuator includes a housing having an opening and a first fluid passageway leading to the opening. An adjustment member is disposed in the housing and includes a protrusion that extends into the opening of the h
An engine valve actuator for an internal combustion engine is provided. The engine valve actuator includes a housing having an opening and a first fluid passageway leading to the opening. An adjustment member is disposed in the housing and includes a protrusion that extends into the opening of the housing. A piston is disposed in the opening of the housing and has a bore adapted to receive the protrusion, a chamber, and a second fluid passageway that connects the bore with the chamber. The piston is adapted to move in a first direction relative to the housing in response to an introduction of pressurized fluid into the first fluid passageway. The piston moves in the first direction until the protrusion substantially withdraws from the bore. A push rod is operatively engaged with the piston such that movement of the piston in the first direction causes a corresponding movement of the push rod to thereby engage and open the engine valve.
대표청구항
▼
1. An engine valve actuator for an internal combustion engine, comprising:a housing having an opening and a first fluid passageway leading to the opening; an adjustment member disposed in the housing and including a protrusion extending into the opening of the housing; a piston disposed in the openi
1. An engine valve actuator for an internal combustion engine, comprising:a housing having an opening and a first fluid passageway leading to the opening; an adjustment member disposed in the housing and including a protrusion extending into the opening of the housing; a piston disposed in the opening of the housing and having a bore adapted to receive the protrusion, a chamber, and a second fluid passageway connecting the bore with the chamber, the piston adapted to move in a first direction relative to the housing in response to an introduction of pressurized fluid into the first fluid passageway, the piston moving in the first direction until the protrusion substantially withdraws from the bore; and a push rod operatively engaged with the piston such that movement of the piston in the first direction causes a corresponding movement of the push rod to thereby engage and open the engine valve; and a piston return spring acting on the piston to move the piston into engagement with the protrusion, wherein the piston return spring and the push rod are disposed in the chamber of the piston. 2. The engine valve actuator of claim 1, wherein the protrusion of the adjustment member includes a chamfered edge.3. The engine valve actuator of claim 2, wherein the bore of the piston includes a chamfered edge.4. The engine valve actuator of claim 1, wherein the piston includes a pressure surface and the adjustment member includes a shoulder adapted to engage a portion of the pressure surface.5. The engine valve actuator of claim 1, wherein the adjustment member and the housing include corresponding threads that allow the adjustment member to be moved relative to the housing to adjust the distance that the protrusion projects into the opening.6. The engine valve actuator of claim 5, further including a nut engageable with the threads of the adjustment member to secure the adjustment member relative to the housing.7. An engine, comprising:an engine block defining a cylinder; a piston slidably disposed in the cylinder; an engine valve moveable between a first position where a flow of fluid relative to the engine valve is prevented and a second position where a flow of fluid relative to the engine valve is allowed; a housing having a first fluid passageway leading to an opening; an adjustment member disposed in the housing and having a protrusion extending into the opening of the housing; a piston disposed in the opening of the housing and having a bore adapted to receive the protrusion, a chamber, and a second fluid passageway connecting the bore with the chamber, the piston adapted to move in a first direction relative to the housing in response to an introduction of pressurized fluid into the first fluid passageway, the piston moving in the first direction until the protrusion substantially withdraws from the bore; and a push rod operatively engaged with the piston such that movement of the piston in the first direction causes a corresponding movement of the push rod to thereby engage and move the engine valve towards the second position. a piston return spring acting on the piston to move the piston into engagement with the protrusion, wherein the piston return spring and the push rod are disposed in the chamber of the piston. 8. The engine of claim 7, further including a valve return spring acting to move the engine valve towards the first position.9. The engine of claim 7, wherein the protrusion of the adjustment member includes a chamfered edge.10. The engine of claim 9, wherein the bore of the piston includes a chamfered edge.11. The engine of claim 7, wherein the piston includes a pressure surface and the adjustment member includes a shoulder adapted to engage a portion of the pressure surface.12. The engine of claim 7, wherein the adjustment member and the housing include corresponding threads that allow the adjustment member to be moved relative to the housing to adjust the distance that the protrusion projects into the opening.13. The engine of claim 12, further including a nut engageable with the threads of the adjustment member to secure the adjustment member relative to the housing.14. An engine valve actuator for an internal combustion engine, comprising:a housing having an opening and a first fluid passageway leading to the opening; an adjustment member disposed in the housing and including a protrusion extending into the opening of the housing; a variable displacement pump fluidly connected to the first fluid passageway; a control valve disposed between the pump and the first fluid passageway, the control valve having a first position where fluid flows relative to the control valve and a second position where fluid is blocked from flowing relative to the control valve; a piston disposed in the opening of the housing and having a bore adapted to receive the protrusion, a chamber, and a second fluid passageway connecting the bore with the chamber, the piston adapted to move in a first direction relative to the housing in response to a flow of fluid through the control valve, the piston moving in the first direction until the protrusion substantially withdraws from the bore, wherein the piston includes a pressure surface and the adjustment member includes a shoulder adapted to engage a portion of the pressure surface; a piston return spring acting on the piston to move the portion of the pressure surface into engagement with the shoulder; and a push rod operatively engaged with the piston such that movement of the piston in the first direction causes a corresponding movement of the push rod to thereby engage and open the engine valve, wherein the piston return spring and the push rod are disposed in the chamber of the piston. 15. The engine valve actuator of claim 14, further including a controller in communication with the control valve and operable to cause movement of the control valve between the first and second positions.16. The engine valve actuator of claim 14, wherein the adjustment member and the housing include corresponding threads that allow the adjustment member to be moved relative to the housing to adjust the distance that the protrusion projects into the opening.17. The engine valve actuator of claim 16, further including a nut engageable with the threads of the adjustment member to secure the adjustment member relative to the housing.18. An engine, comprising:an engine block defining a cylinder; a piston slidably disposed in the cylinder; an engine valve moveable between a first position where a flow of fluid relative to the engine valve is prevented and a second position where a flow of fluid relative to the engine valve is allowed; a housing having a first fluid passageway leading to an opening; an adjustment member disposed in the housing and having a protrusion extending into the opening of the housing; a variable displacement pump fluidly connected to the first fluid passageway; a control valve disposed between the pump and the first fluid passageway, the control valve having a first position where fluid flows relative to the control valve and a second position where fluid is blocked from flowing relative to the control valve; a piston disposed in the opening of the housing and having a bore adapted to receive the protrusion, a chamber, and a second fluid passageway connecting the bore with the chamber, the piston adapted to move in a first direction relative to the housing in response to a flow of fluid through the control valve, the piston moving in the first direction until the protrusion substantially withdraws from the bore, wherein the piston includes a pressure surface and the adjustment member includes a shoulder adapted to engage a portion of the pressure surface; a piston return spring acting on the piston to move the portion of the pressure surface into engagement with the shoulder; and a push rod operatively engaged with the piston such that movement of the piston in the first direction causes a corresponding movement of the push rod to engage and move the engine valve towards the second position, wherein the piston return spring and the push rod are disposed in the chamber of the piston. 19. The engine of claim 18, further including a controller in communication with the control valve and configured to control the movement of the control valve between the first and second positions.20. The engine of claim 18, further including a valve return spring acting to move the engine valve towards the first position.21. The engine of claim 18, wherein the adjustment member and the housing including corresponding threads that allow the adjustment member to be moved relative to the housing to adjust the distance that the protrusion projects into the opening.22. The engine of claim 21, further including a nut engageable with the threads of the adjustment member to secure the adjustment member relative to the housing.
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