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| Number | Title | Issue Date |
| 7559302 | Thermally insulating element for an engine valve assembly A cylinder head assembly for an internal combustion engine including a cylinder head at least partially defining a flow path through the engine, including an intake port, an exhaust port, and a combustion chamber disposed between the intake port and the exhaust port... | 07/14/2009 |
| 7273026 | Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i... | 09/25/2007 |
| 7263956 | Valve lifter assembly for selectively deactivating a cylinder A valve lifter assembly for deactivating a cylinder in an internal combustion engine. The valve lifter assembly is provided with a plunger movably disposed within a bore of a main body member to controllably isolate the cam lift from the rocker arm and valve of the ... | 09/04/2007 |
| 7237520 | Hydraulic valve-lash-adjusting element (HVA) A hydraulic valve-lash-adjusting element (HVA) for the valve train of an internal combustion engine, wherein: a housing (1) has a blind bore (2) in which a piston (3) is guided with sealing clearance and is in ... | 07/03/2007 |
| 7210439 | Switching element for a valve train of an internal combustion engine The invention proposes a switching element (1) for a valve train of an internal combustion engine, particularly for valve deactivation, with a simple-to-implement measure for adjusting the coupling lash of its coupling means (8) in a receptacle (6 | 05/01/2007 |
| 7207303 | Switching element A switch element (1) is proposed for valve shut-off, fabricated as cam follower for a plunger rod valve drive of an internal combustion engine, having an outer part (2) and an inner element (4) axially movable in its bore (3) and with rot... | 04/24/2007 |
| 7146953 | Mechanical valve play compensation element for a valve drive on a piston combustion engine The invention relates to a mechanical valve play compensation element for a valve drive on a piston combustion engine, comprising a first pressure part (1) which is axially displaceable in relation to a second pressure part (2) and which is fixed in su... | 12/12/2006 |
| 7131411 | Adjustable fast bleed lifter A limited leak-down variable duration lifter and its adjustment is provided to maximize performance gains at low engine rpm when used with a conventional cam and more particularly with a conventional hi-performance camshaft. The increased performance gains were here... | 11/07/2006 |
| 7044095 | Roller tappet with cold advance A cold advance device for advancing the injection beginning in cold condition diesel engine with single plunger pumps, by means of which the injection onset is adjusted in cold conditions and also in normal conditions. A piston is provided in the roller tappet and t... | 05/16/2006 |
| 6997433 | Electronic valve actuator having vibration cancellation An electronically controlled valve actuator having an armature, a valve, and a coupler for coupling the actuator to the valve with motion of the armature in a first direction moving the second piston in a second direction. The actuator includes an electromagnet, an ... | 02/14/2006 |
| 6964251 | Leakdown plunger The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity and a second cavity, wherein the first cavity includes a first inner surface configured to house a cylindrical insert, the second cavity includes a second inner... | 11/15/2005 |
| 6857403 | Hydraulically controlled actuator for activating a valve An hydraulically controlled actuator for activating a valve, especially for activating a gas-exchange valve in a combustion cylinder of an internal combustion engine, which includes two fluid-filled pressure chambers having controllable chamber volumes and a movable... | 02/22/2005 |
| 6769385 | System for controlling engine valve seating velocity A velocity control system for an engine valve is provided. The system includes a valve having a housing defining an opening, a chamber adapted to receive a fluid, a first fluid passageway connecting the opening with the chamber, a second fluid passageway connecting ... | 08/03/2004 |
| 6732692 | Device and method for providing tappet alignment A device for resisting rotation of a valve tappet, and in particular a roller valve tappet, is provided as part of a cylinder head gasket. The device includes a resilient portion having a flat face contacting a flat surface of a valve tappet to resist rotation there... | 05/11/2004 |
| 6688269 | Roller tappet The invention relates to a roller tappet, with at least the shaft made from plastic. The aim of the invention is to achieve a weight-saving mounting of the roller. The aim is achieved, in that the axle carrying the roller may be clipped into the insert, w... | 02/10/2004 |
| 6684838 | Tappet A tappet (1) for the transfer of a lifting motion to a sliding part is provided having two parts, including a circular shaped section (2) with a base (5) connected to it as one piece and a separate dome-shaped socket (9) connected to the base (5) made of ... | 02/03/2004 |
| 6681730 | Hydraulic damper for an electromechanical valve A hydraulic system for an electromechanical valve is provided. The system includes a housing defining a chamber for holding fluid extending along an axis. The system further includes a damper stem disposed in the chamber configured to move along the axis.... | 01/27/2004 |
| 6675751 | Two-mass bi-directional hydraulic damper A hydraulic damper for an automotive engine electromechanical cylinder valve 20 is provided. The hydraulic damper includes an inner piston 130 which is slidably mounted within an outer piston 110. The outer piston is slidably mounted within an interior hy... | 01/13/2004 |
| 6564764 | Switchable tappet for directly transmitting a cam lift onto a tappet push rod A switchable tappet for directly transmitting a cam lift onto a tappet push rod, includes a housing having a push rod distal end which is formed with a ramp surface for contact by a cam. An inner element is placed in a recess of thehousing and has a push ... | 05/20/2003 |
| 6550433 | Engine valve actuator with valve seating control The present invention provides a hydraulic actuator for operating an engine valve, which includes a means for controlling the seating velocity of the valve. The design allows for free, unrestricted movement of the actuator piston during opening of the eng... | 04/22/2003 |
| 6530350 | Internal-combustion engine with hydraulic system for variable operation of the valves and means for compensating variations in volume of the hydraulic fluid In an internal-combustion engine with a hydraulic system for variable operation of the engine valves, there is envisaged at least one supplementary reservoir bled off to the atmosphere, communicating with the low-pressure circuit for compensating for the ... | 03/11/2003 |
| 6520129 | Internal combustion engine with an hydraulic system for the variable driving of valves and a double-piston tappet In an internal combustion engine comprising an hydraulic system for the variable driving of valves, one tappet comprises two separate piston sections that are connected to two distinct pressure chambers, which control the driving pistons of two separate v... | 02/18/2003 |
| 6439186 | Mechanical oil filtration in an I.C. engine valve lifter A mechanical oil filtration and oil flow re-direction system for a hydraulically actuated valve lifter. Pressurized oil is directed to the lifter through a series of controlled clearance passages prior to gaining access to the internal cavity of the lifte... | 08/27/2002 |
| 6412457 | Engine valve actuator with valve seating control The present invention provides a hydraulic actuator for operating an engine valve, which includes a means for controlling the seating velocity of the valve. The design allows for free, unrestricted movement of the actuator piston during opening of the eng... | 07/02/2002 |
| 6397806 | Engine valve assembly for internal combustion engine In an engine valve assembly, a valve lifter comprises a cylindrical main body portion and a head wall portion by which an opening of the cylindrical main body portion is enclosed and with which a cam is brought in contact, a valve stem is contacted on an ... | 06/04/2002 |
| 6382147 | Valve drive for a valve of an internal combustion engine A valve drive for a valve of an internal combustion engine, wherein the valve is connected to a main piston which is arranged in a cylinder chamber and which for opening of the valve can be acted upon by pressure fluid flowing into the cylinder chamber, w... | 05/07/2002 |
| 6325028 | Internal combustion engines with variable valve actuation In an internal combustion engine having a hydraulic system for valve variable actuation and a hydraulic braking device for slowing down the valve during the final portion of its closing travel, this hydraulic braking device is arranged so as to be substan... | 12/04/2001 |
| 6321706 | Variable valve opening duration system A valve assembly having a valve (10, 110, 210, 310, 410) that is caused to reciprocate between open and closed positions by engagement of a cam follower (16, 116, 216, 316,416) with a cam (14, 114, 214, 314, 414) that is carried by a rotatable camshaft (1... | 11/27/2001 |
| 6237550 | Solenoid-operated valve for internal combustion engine A solenoid-operated valve for use in an internal combustion engine has a valve body movable into and out of abutment of an intake/exhaust port in the internal combustion engine to close and open an intake/exhaust passage in communication therewith, a mova... | 05/29/2001 |
| 6192841 | Device to limit valve seating velocities in limited lost motion tappets An internal combustion engine valve actuation system is disclosed. The present invention provides a hydraulic actuator for operating an engine valve, which includes a control element for controlling the seating velocity of the valve. The present invention... | 02/27/2001 |
| 6138621 | Internal combustion engine with variable valve actuation An internal combustion engine having a hydraulic system for valve variable actuation and a hydraulic braking device for braking the valve in the final stage of its closing travel. A passage is provided for excluding the above mentioned braking when the en... | 10/31/2000 |
| 6135073 | Hydraulic check valve recuperation An hydraulic actuator for a spring closed poppet valve is connected to an electrically motivated valve selecting a high or a low fluid pressure source for a chamber in which a plunger reciprocates in a cylindrical body. Poppet valve closing is controlled ... | 10/24/2000 |
| 5954020 | Cup-shaped tappet A cup-shaped tappet (1) for actuating a gas exchange valve (17) of an internal combustion engine, comprising a cylindrical jacket (6) closed at one end by a bottom (7) and guided in a bore (2) of a cylinder head (3), the valve tappet (1) being actuated by... | 09/21/1999 |
| 5901676 | Hydraulic lash compensator A hydraulic lash adjuster (130) for an internal combustion engine which includes a body (132) and a plunger (134) of thin-walled construction in which features such as hydraulic fluid collector volumes between the plunger and the body and a check valve se... | 05/11/1999 |
| 5855191 | Metering valve for ball plunger or pushrod socket A hydraulic lash adjuster of the type including a ball plunger (61) defining a passage (63), or a body portion (85) defining a passage (87). A metering valve is disposed in the passage, and in accordance with the invention (FIGS. 2-4), a shank portion (77... | 01/05/1999 |
| 5749340 | Hydraulic tappets A hydraulic tappet comprises an open-ended cylinder and a piston slidably accommodated in the cylinder. One end of the piston projects out of the open end of the cylinder and engages a valve rocker. A gear mechanism is provide to effect rotation of the cy... | 05/12/1998 |
| 5727509 | Cam follower in the form of a tappet or a lever having a hydraulic valve clearance compensation element The clearance compensation element (5) of a hydraulic tappet (1) is retained axially in cam-remote direction by an axial extension (11) of a guide element (10) which extends radially inwards from the housing (2). The cam-remote end of the axial extension ... | 03/17/1998 |
| 5709195 | Fuel injection device for internal combustion engines A fuel injection device with a pump plunger which is driven in reciprocation and a working space which is enclosed by the pump plunger, and is connected to an injection valve connected directly to the pump housing. To control the fuel injection quantity a... | 01/20/1998 |
| 5704319 | Hydraulic clearance compensation element for valve control units of internal-combustion engines The invention concerns a hydraulic play-compensation element including a groove (11) in the housing (1) to be located in such a way that, whatever the position of the plunger (2), a length (19) of the plunger is always supported by the cylinder wall above... | 01/06/1998 |
| 5673662 | Direct-acting hydraulic tappet with reduced aeration A direct-acting hydraulic tappet having a cup-like tappet body which includes a cylindrical projection extending inwardly from the base of the body and in which the hydraulic element of the tappet is received. A resiliently deformable diaphragm is receive... | 10/07/1997 |
