公开(公告)号：US20140130774A1

公开(公告)日：2014-05-15

申请号：US14127259

申请日：2011-07-06

Applicant: Romain Le Forestier ,  Romain Riviere

Inventor： Romain Le Forestier ,  Romain Riviere

IPC: F01L13/06 ,  F01L1/24 ,  F02D9/06

CPC classification number: F02D9/06 ,  F01L1/181 ,  F01L1/2416 ,  F01L13/0021 ,  F01L13/06 ,  F01L13/08

Abstract: A valve actuation mechanism includes rockers moved by a camshaft, each rocker being adapted to exert a valve opening force on at least a portion of a valve opening actuator of each cylinder, via an activation piston, housed in a bore of the rocker and movable with respect to the rocker under action of a fluid pressure raise in a chamber fluidly linked to the bore, from a first position to a second position, in which a cam follower of the rocker reads at least one auxiliary cam sector of a cam of the camshaft so as to perform an engine operating function. Each rocker includes a reset valve adapted to reduce fluid pressure in the chamber. The valve actuation mechanism includes, for each rocker, a reset cam profile adapted to open the reset valve when the activation piston has to be moved from its second position to its first position, and each reset valve includes a cam follower adapted to drive the reset valve as a function of the movement of the reset profile.

Abstract translation: 阀致动机构包括由凸轮轴移动的摇臂，每个摇杆适于通过活塞活塞在每个气缸的阀开启致动器的至少一部分上施加阀打开力，活塞活塞容纳在摇臂的孔中，并可与 在从第一位置到第二位置的流体连接到孔的腔室中的流体压力升高的作用下相对于摇杆，其中摇臂的凸轮从动件读取凸轮轴的凸轮的至少一个辅助凸轮部分 以执行发动机操作功能。 每个摇杆包括适于减小腔室中的流体压力的复位阀。 对于每个摇杆，阀致动机构包括当活塞活塞必须从其第二位置移动到其第一位置时适于打开复位阀的复位凸轮轮廓，并且每个复位阀包括适于驱动复位的凸轮随动件 阀作为复位曲线的运动的函数。

公开(公告)号：US20100108005A1

公开(公告)日：2010-05-06

申请号：US12566666

申请日：2009-09-25

Applicant: Kenji ITO ,  Mitsuru EMORI

Inventor： Kenji ITO ,  Mitsuru EMORI

IPC: F01L1/34 ,  F01M1/06

CPC classification number: F01L13/0063 ,  F01L1/185 ,  F01L1/2416 ,  F01L2105/00 ,  F01L2810/02 ,  F01L2820/032 ,  F01M9/10

Abstract: An internal combustion engine includes a control shaft, an actuator, and an oil accumulation portion. The control shaft is configured to vary a lift amount of an engine valve in accordance with a rotational position of the control shaft. The actuator is configured to drive the control shaft to make the lift amount of the engine valve to be a start lift amount before the engine is started. The actuator includes a worm wheel and a worm. The worm wheel is provided at the control shaft and is disposed in an engine body. The worm is disposed below the control shaft and engages with the worm wheel. The oil accumulation portion is provided at at least one of the control shaft and the worm wheel and is configured to drop oil onto the worm in accordance with the rotation of the control shaft when the engine is started.

Abstract translation: 内燃机包括控制轴，致动器和油积存部。 控制轴构造成根据控制轴的旋转位置来改变发动机气门的升程量。 致动器构造成驱动控制轴，以使发动机气门的升程量成为发动机起动前的起动提升量。 致动器包括蜗轮和蜗杆。 蜗轮设置在控制轴处，并设置在发动机主体中。 蜗杆设置在控制轴下方并与蜗轮啮合。 油积存部设置在控制轴和蜗轮中的至少一个上，并且构造成在发动机起动时根据控制轴的旋转将油滴落到蜗杆上。

公开(公告)号：US07434557B2

公开(公告)日：2008-10-14

申请号：US11632811

申请日：2005-06-18

Applicant: Peter Sailer ,  Oliver Schnell

Inventor： Peter Sailer ,  Oliver Schnell

IPC: F01L1/14

CPC classification number: F01L1/245 ,  F01L1/24 ,  F01L1/2405 ,  F01L1/2411 ,  F01L1/2416 ,  F01L1/2422 ,  F01L1/25 ,  F01L1/255 ,  F01L2001/2438 ,  F01L2101/00

Abstract: A hydraulic reverse spring valve clearance compensation element (RSHVA) for a valve train of an internal combustion engine comprising: a housing (2), which has a blind bore (3), in which a piston (4) is guided with a tight, sealing clearance; the piston (4) comprises a lower piston part (4a) with a lower piston head (5), which together with the blind bore (3) defines a high-pressure chamber (7), whilst a low-pressure chamber (8) is situated above the lower piston head (5); the pressure chambers (7, 8) being connected by a central axial bore (10) in the lower piston head (5), which is controlled by a control valve (11) arranged on the underside (23) of the lower piston head (5); the control valve (11) comprises a control valve ball (19), upon which a control valve spring (20) acts in the opening direction and the lift of which is limited by a lift-limiting stop (24) of a valve ball cap (21), whereby an RSHVA, the idle lift of which is as independent as possible of the viscosity and hence of the temperature of the lubricating oil is to be created and is achieved in that temperature-sensitive means influencing the closing time of the control valve (11) are provided, which lead to a closing time of the control valve (11) that is largely independent of the lubricating oil temperature of the internal combustion engine.

Abstract translation: 一种用于内燃机的气门机构的液压反向弹簧阀间隙补偿元件（RSHVA），包括：壳体（2），其具有盲孔（3），活塞（4）以紧密， 密封间隙; 活塞（4）包括具有下活塞头（5）的下活塞部分（4a），其与盲孔（3）一起限定高压室（7），而低压室（8） ）位于下活塞头（5）的上方; 所述压力室（7,8）由下活塞头（5）中的中心轴向孔（10）连接，所述中心轴向孔（10）由设置在所述下活塞头（5）的下侧（23）上的控制阀（11） 5）; 控制阀（11）包括控制阀球（19），控制阀弹簧（20）在打开方向上作用，并且其升力受到阀球帽的限位挡块（24）的限制 （21），由此可以产生其空转升力尽可能独立于其粘度，因此产生润滑油温度的RSHVA，并且在影响控制关闭时间的温度敏感装置中实现RSHVA 提供阀（11），其导致控制阀（11）的关闭时间，其大大独立于内燃机的润滑油温度。

公开(公告)号：US20080072857A1

公开(公告)日：2008-03-27

申请号：US11632811

申请日：2005-06-18

Applicant: Peter Sailer ,  Oliver Schnell

Inventor： Peter Sailer ,  Oliver Schnell

IPC: F01L1/245

CPC classification number: F01L1/245 ,  F01L1/24 ,  F01L1/2405 ,  F01L1/2411 ,  F01L1/2416 ,  F01L1/2422 ,  F01L1/25 ,  F01L1/255 ,  F01L2001/2438 ,  F01L2101/00

Abstract: A hydraulic reverse spring valve clearance compensation element (RSHVA) for a valve train of an internal combustion engine comprising: a housing (2), which has a blind bore (3), in which a piston (4) is guided with a tight, sealing clearance, the piston (4) comprises a lower piston part (4a) with a lower piston head (5), which together with the blind bore (3) defines a high-pressure chamber (7), whilst a low-pressure chamber (8) is situated above the lower piston head (5); the pressure chambers (7, 8) being connected by a central axial bore (10) in the lower piston head (5), which is controlled by a control valve (11) arranged on the underside (23) of the lower piston head (5); the control valve (11) comprises a control valve ball (19), upon which a control valve spring (20) acts in the opening direction and the lift of which is limited by a lift-limiting stop (24) of a valve ball cap (21), whereby an RSHVA, the idle lift of which is as independent as possible of the viscosity and hence of the temperature of the lubricating oil is to be created and is achieved in that temperature-sensitive means influencing the closing time of the control valve (11) are provided, which lead to a closing time of the control valve (11) that is largely independent of the lubricating oil temperature of the internal combustion engine.

Abstract translation: 一种用于内燃机的气门机构的液压反向弹簧阀间隙补偿元件（RSHVA），包括：壳体（2），其具有盲孔（3），活塞（4）以紧密， 活塞（4）包括具有下活塞头（5）的下活塞部分（4a），其与盲孔（3）一起限定高压室（7），同时低压 室（8）位于下活塞头（5）的上方; 所述压力室（7,8）由下活塞头（5）中的中心轴向孔（10）连接，所述中心轴向孔（10）由设置在所述下活塞头（5）的下侧（23）上的控制阀（11） 5）; 控制阀（11）包括控制阀球（19），控制阀弹簧（20）在打开方向上作用，并且其升力受到阀球帽的限位挡块（24）的限制 （21），由此可以产生其空转升力尽可能独立于其粘度，因此产生润滑油温度的RSHVA，并且在影响控制关闭时间的温度敏感装置中实现RSHVA 提供阀（11），其导致控制阀（11）的关闭时间，其大大独立于内燃机的润滑油温度。

公开(公告)号：US20230313714A1

公开(公告)日：2023-10-05

申请号：US18190454

申请日：2023-03-27

Applicant: Cummins Inc.

Inventor： James A. Dods ,  Brett A. Heald ,  Alan Ronald Bennett

IPC: F01L1/24

CPC classification number: F01L1/2416

Abstract: Valve actuation mechanisms are provided for hydraulically controlling cylinder deactivation and variable valve lift operations. The valve actuation mechanisms include a hydraulic circuit that is selectively pressurized to secure a reciprocating member in an extended position to transfer motion from the camshaft lobe to the intake valves or exhaust valves, and vented to allow the reciprocating member to reciprocate.

公开(公告)号：US20190145291A1

公开(公告)日：2019-05-16

申请号：US16244135

申请日：2019-01-10

Applicant: EATON INTELLIGENT POWER LIMITED

Inventor： Majo Cecur ,  Marco Alessandria ,  Nicola Andrisani

IPC: F01L13/06 ,  F01L1/18 ,  F01L1/24

CPC classification number: F01L13/06 ,  F01L1/18 ,  F01L1/181 ,  F01L1/24 ,  F01L1/2416 ,  F01L13/065 ,  F01L2760/004 ,  F02D13/04

Abstract: An exhaust valve rocker arm assembly operable in a combustion engine mode and an engine braking mode includes: a rocker shaft that defines a pressurized oil supply conduit; a rocker arm for receiving the rocker shaft and to rotate around the rocker shaft, the rocker arm including an oil supply passage defined therein; a valve bridge for engaging a first exhaust valve and a second exhaust valve; a first plunger body movable between a first position and a second position, and that in the first position extends rigidly for cooperative engagement with the valve bridge; a check valve disposed on the rocker arm and including an actuator for selectively releasing pressure acting on the first plunger body, the actuator including a needle including a longitudinal disk portion and a disk portion; and an oil discharge circuit for to selectively depressurizing oil under the disk portion of the actuator.

公开(公告)号：US20180320563A1

公开(公告)日：2018-11-08

申请号：US15974038

申请日：2018-05-08

Applicant: MAN Truck & Bus Österreich GesmbH

Inventor： Gottfried Raab ,  Thomas Eibl ,  Franz Leitenmayr ,  Ewald Hundsberger

IPC: F01L1/24 ,  F01L13/00

CPC classification number: F01L1/2416 ,  F01L1/181 ,  F01L13/0005 ,  F01L2001/186 ,  F01L2001/2444 ,  F01L2105/00 ,  F01L2810/04 ,  F01L2820/031

Abstract: A valve train lever for actuating a valve of a reciprocating piston engine, in particular an internal combustion engine. The valve train lever comprises a lever arm, which is pivotally movable about a pin; a tapping element, which lies against or can be made to lie against a cam of a camshaft of the reciprocating piston engine; a coupling mechanism, by way of which the tapping element is coupled to the lever arm spring-elastically in a first state and rigidly in a second state; and an actuating element, which is connected to the lever arm and lies against or can be made to lie against a valve tappet of the valve.

公开(公告)号：US10072535B2

公开(公告)日：2018-09-11

申请号：US15402576

申请日：2017-01-10

Applicant: Schaeffler Technologies AG & Co. KG

Inventor： John Stallmann

IPC: F01L1/46 ,  F01L1/24 ,  F01L1/245 ,  F01L9/02

CPC classification number: F01L1/2416 ,  F01L1/08 ,  F01L1/143 ,  F01L1/146 ,  F01L1/2405 ,  F01L1/2422 ,  F01L1/245 ,  F01L1/465 ,  F01L9/023 ,  F01L13/065 ,  F01L2101/00 ,  F01L2105/00

Abstract: A lash compensator for a valve train component of an internal combustion engine is provided that includes an end-cap arranged within a reverse-spring control valve assembly of an axially moveable piston. The piston has a first reservoir and an inner radial wall configured with a through-aperture. The reverse-spring control valve assembly has a control valve housing, a bias spring, an end-cap, and a closing body. The end-cap is configured with a cupped end; an inner side of the cupped end receives a second lower end of the bias spring, and an outer side of the cupped end engages an upper portion of the closing body. The end-cap minimizes or eliminates the variation in flow resistance caused by a variation in end-coil geometry of the second lower end of the bias spring.

公开(公告)号：US20180223701A1

公开(公告)日：2018-08-09

申请号：US15427865

申请日：2017-02-08

Applicant: Caterpillar Inc.

Inventor： Ashwin A. Hattiangadi ,  Selvakumar Selvaraj

IPC: F01L1/24 ,  F01L1/18

CPC classification number: F01L1/181 ,  F01L1/053 ,  F01L1/2416 ,  F01L1/26 ,  F01L1/32 ,  F01L1/462 ,  F01L2101/00 ,  F01L2103/00

Abstract: A replaceable hydraulic lash adjuster and method for assembling such are disclosed. The replaceable hydraulic lash adjuster includes a body, a piston, a check valve and a spring. The body configured to be received in and released from a compartment of a rocker arm. The body including a sidewall surrounding a floor. The floor including a passage that extends between an upper cavity and a lower cavity of the body. The piston disposed in the lower cavity. The piston defining a pocket. A check valve is disposed inside the lower cavity and a spring is disposed inside the pocket. The replacable hydraulic lash adjuster is configured to be slidingly removeable from the rocker arm.

公开(公告)号：US10001035B2

公开(公告)日：2018-06-19

申请号：US15545933

申请日：2017-03-14

Applicant: CUMMINS INC.

Inventor： Adam C. Cecil ,  David M. Barnes

IPC: F01L1/24 ,  F01L1/18 ,  F01L1/26 ,  F01L1/46

CPC classification number: F01L1/24 ,  F01L1/181 ,  F01L1/2405 ,  F01L1/2416 ,  F01L1/26 ,  F01L1/267 ,  F01L1/46 ,  F01L2103/00 ,  F01L2105/00 ,  F01L2107/00 ,  F01L2820/01

Abstract: An eccentric hydraulic lash adjuster, a combustion engine comprising the eccentric hydraulic lash adjuster, and a method of assembling the combustion engine, the combustion engine including a rocker lever having a nose at a distal end thereof, and a bridge bar extending between two valves, the rocker lever configured to apply pressure on the bridge bar to actuate the two valves, and an eccentric hydraulic lash adjuster positioned in the nose of the rocker lever; and a fuel injector adjacent to the nose of the rocker lever and the bridge bar, wherein the eccentric hydraulic lash adjuster includes a housing having a pivot point and a longitudinal axis offset from the pivot point and is configured to pivot about the pivot point when the rocker lever pivots about the rocket lever shaft, wherein the offset is dimensioned to prevent interference between the nose and the fuel injector.