Mechanically controllable valve drive for a reciprocating piston engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01L-001/34
F01L-001/04
F01L-001/08
F01L-009/04
F01L-013/00
출원번호
US-0047022
(2013-10-07)
등록번호
US-9279348
(2016-03-08)
우선권정보
DE-10 2012 109 538 (2012-10-08)
발명자
/ 주소
Lauer, Frederic
Hosse, Daniel
Flierl, Rudolf
출원인 / 주소
KOLBENSCHMIDT PIERBURG INNOVATIONS GMBH
대리인 / 주소
Thot, Norman B.
인용정보
피인용 횟수 :
1인용 특허 :
6
초록▼
A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve includes the gas exchange valve, a cam assembly comprising a camshaft and at least one cam for the gas exchange valve, a valve, a valve lift adjustment assembly, a drag lift assembly,
A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve includes the gas exchange valve, a cam assembly comprising a camshaft and at least one cam for the gas exchange valve, a valve, a valve lift adjustment assembly, a drag lift assembly, and a device. The valve lift adjustment assembly comprises a valve lift adjustment device, and an intermediate lever assembly comprising at least one intermediate lever comprising a working curve comprising curve portions. The valve lift adjustment assembly is configured to shift the valve between a zero lift and a maximum lift. The drag lever assembly is operatively connected to the working curve. The device is configured to provide a valve-lift standstill range so that, in a maximum lift position, the valve is opened for a turning angle ω of the camshaft with a flattened valve lift height.
대표청구항▼
1. A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve, the mechanically controllable valve drive comprising: the gas exchange valve;a cam assembly comprising a camshaft and at least one cam for the gas exchange valve;a valve;a valve li
1. A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve, the mechanically controllable valve drive comprising: the gas exchange valve;a cam assembly comprising a camshaft and at least one cam for the gas exchange valve;a valve;a valve lift adjustment assembly comprising:a valve lift adjustment device, andan intermediate lever assembly comprising at least one intermediate lever comprising a working curve comprising curve portions,the valve lift adjustment assembly being configured to shift the valve between a zero lift and a maximum lift;a drag lever assembly operatively connected to the working curve; anda device configured to provide a valve-lift standstill range so that, in a maximum lift position, the valve is opened for a turning angle ω of the camshaft with a flattened valve lift height,wherein,the device comprises the working curve which comprises a valve-lift standstill portion, the working curve, when viewed in succession, comprising a zero lift portion, an adjustment portion, and the valve-lift standstill portion, the valve-lift standstill portion being configured to flatten with respect to the adjustment portion,a valve-lift curve for the valve-lift standstill portion comprises a substantially constant, unchanged lift portion which defines a valve-lift standstill range, andthe valve-lift standstill range exists over a turning angle ω of the camshaft in the valve-lift standstill portion of between 30° and 150°. 2. The mechanically controllable valve drive as recited in claim 1, further comprising: a sliding block comprising a sliding path,wherein,the drag lever assembly further comprises a third roll, andthe intermediate lever further comprises a first arm comprising a first roll, a pivot center, and a second roll arranged in the pivot center which is configured to roll on a contour of the valve lift adjustment device, the first roll being configured to move directly or indirectly via the cam of the camshaft on the sliding path of the sliding block, and a second arm comprising the working curve, the second arm being configured to cooperate with the third roll of the drag lever assembly. 3. The mechanically controllable valve drive as recited in claim 2, wherein the sliding path defines a curved path about a center of the third roll of the drag lever assembly. 4. The mechanically controllable valve drive as recited in claim 2, wherein the valve-lift standstill portion comprises a radius r1 and the zero lift portion comprises a radius r2, the zero lift portion and the valve-lift standstill portion both define a part of a curved path about a pivot point of a center of an axis of the first roll, the radius ri of the valve-lift standstill portion being larger than the radius r2 of the zero lift portion. 5. The mechanically controllable valve drive as recited in claim 1, wherein the turning angle ω of the camshaft in the valve-lift standstill portion is between 70° and 150°. 6. The mechanically controllable valve drive as recited in claim 1, wherein the gas exchange valve comprises at least one hydraulic actuator configured to actuate the gas exchange valve. 7. The mechanically controllable valve drive as recited in claim 1, wherein the gas exchange valve is designed as an outlet valve. 8. The mechanically controllable valve drive as recited in claim 1, wherein the camshaft comprises a second cam configured to provide a second valve lift. 9. An internal combustion engine, the internal combustion engine comprising at least one cylinder comprising at least one inlet valve and at least one outlet valve, wherein the at least one outlet valve is controlled by the mechanically controllable valve drive as recited in claim 1. 10. The internal combustion engine as recited in claim 9, wherein in the internal combustion engine is a diesel engine. 11. The internal combustion engine as recited in claim 9, wherein the at least one gas inlet valve is controlled by a variable valve drive.
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이 특허에 인용된 특허 (6)
Scheinert Helmut (Ebersbach/Fils DEX), Arrangement for recirculating exhaust gas in an internal combustion engine.
Kreuter Peter (Aachen DEX) Heuser Peter (Aachen DEX), Method for controlling an internal combustion engine with external ignition system and with a fuel injection system.
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