Device for controlling a gas exchange valve for internal combustion engines
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01L-009/02
출원번호
US-0485543
(2000-02-14)
우선권정보
DE9826047 (1998-06-12)
발명자
/ 주소
Diehl Udo,DEX
Mischker Karsten,DEX
Walter Rainer,DEX
Franzl Stefan,DEX
Beuche Volker,DEX
Reimer Stefan,DEX
출원인 / 주소
Robert Bosch GmbH, DEX
대리인 / 주소
Greigg
인용정보
피인용 횟수 :
15인용 특허 :
4
초록▼
A device for controlling a gas exchange valve for internal combustion engines, having a housing including an axially movable valve member, which on an end close to the combustion chamber, has a valve sealing face that cooperates with a valve seat affixed to the housing and on an end remote from the
A device for controlling a gas exchange valve for internal combustion engines, having a housing including an axially movable valve member, which on an end close to the combustion chamber, has a valve sealing face that cooperates with a valve seat affixed to the housing and on an end remote from the combustion chamber, has a piston that axially separates upper and lower hydraulic working chambers from each other. The lower working chamber closer to the combustion chamber acts on the valve member in the closing direction and the upper working chamber further from the combustion chamber acts on the valve member in the opening direction. The lower working chamber continuously communicates with a high pressure source and the upper working chamber can be alternatingly filled with high pressure by way of a high pressure supply line containing an electric control valve. The upper working chamber is discharged by way of a discharge line that contains an electric control valve. When the electric control valve is without current, the control valve closes the high pressure supply line connected with the upper working chamber and when the electric valve in the discharge line is without current, the discharge line is open.
대표청구항▼
[ What is claimed is:] [1.]1. A device for controlling a gas exchange valve for internal combustion engines, comprising:a housing (3),an axially movable valve member (5) in said housing, said valve member (5), on an end close to the combustion chamber, has a valve sealing face (7) that said valve me
[ What is claimed is:] [1.]1. A device for controlling a gas exchange valve for internal combustion engines, comprising:a housing (3),an axially movable valve member (5) in said housing, said valve member (5), on an end close to the combustion chamber, has a valve sealing face (7) that said valve member uses to cooperate with a valve seat (8) affixed to the housing, and on an end remote from the combustion chamber, the valve member includes a piston (9) that axially separates lower and upper hydraulic working chambers (11 and 15) from each other,the lower working chamber (11) closer to the combustion chamber acts on the valve member (5) in a closing direction, and the upper working chamber (15) further from the combustion chamber acts on the valve member (5) in the opening direction,the lower working chamber (11) continuously communicates with a high pressure source (19) and the upper working chamber (15) can be alternatingly filled with high pressure by use of a high pressure supply line (23) that contains an electric control valve (27),and said upper working chamber is discharged by a discharge line (33) that contains an electric control valve (35),wherein, when the electric control valve (27) is without current, the electric control valve (27) closes the high pressure supply line (23) to prevent a flow of fluid into the upper working chamber (15) and when the electric valve (35) is without current, the electric valve (35) keeps the discharge line (33) open,and in which said high pressure source is upstream of said electric control valve (27) and supplies a pressurized hydraulic working medium into the high pressure supply line (23),a branch line (25) leads from said high pressure supply line into the lower working chamber (11),a check valve (31) that opens in a flow direction is inserted into the high pressure supply line (23) upstream of a connection of branch line (25) with said high pressure supply line (23),the high pressure supply line (23) is connected to a working pressure reservoir (29) that is embodied as a spring reservoir,a mechanically acting restoring member in a form of an emergency spring (39), is provided on the gas exchange valve (1), and said restoring member acts on the gas exchange valve member (5) in a direction of a closing motion of the valve member (5),and the emergency spring (39) is embodied as a compression spring, said compression spring is clamped in the lower working chamber (11) between a housing shoulder and the piston (9) on the valve member (5) of the gas exchange valve (1).
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이 특허에 인용된 특허 (4)
Schechter Michael M. (Farmington Hills MI) Levin Michael B. (Birmingham MI), Balancing valve motion in an electrohydraulic camless valvetrain.
Gaessler,Hermann; Pischke,Ulf; Schweiggart,Hubert; Grosse,Christian, Method for operating a hydraulic actuator, especially a gas exchange valve of an internal combustion engine.
Gaessler, Hermann; Diehl, Udo; Mischker, Karsten; Walter, Rainer; Schiemann, Juergen; Grosse, Christian; Beuche, Volker; Reimer, Stefan, Pressure reservoir for exerting pressure on a hydraulic system, with which preferably a gas exchange valve of an internal combustion engine is actuated.
Tai,Chun; Suder,Timothy A.; Jacques,Walter Curtis; Shade,Benjamin C., System and method for preventing piston-valve collision on a non-freewheeling internal combustion engine.
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