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| Number | Title | Issue Date |
| 8087392 | Variable valve actuation system A variable valve actuation system to actuate and control the seating velocity of an internal combustion engine valve is disclosed. The system may comprise a rocker arm that includes first, second and third contact surfaces. The first contact surface may contact the ... | 01/03/2012 |
| 8033262 | Valve operating system for variable displacement internal combustion engine A cylinder valve operating system for a variable displacement internal combustion engine having poppet valves includes a cam arm driven by a camshaft and a valve arm selectively driven by the cam arm. A valve arm positioner, which may be hydraulically cushioned, adj... | 10/11/2011 |
| 7640906 | Hydraulic valve lash adjuster with idle stroke function for a valve train of an internal combustion engine A hydraulic valve lash adjuster with idle stroke function for a valve train of an internal combustion engine, said hydraulic valve lash adjuster comprising a piston (2, 2′, 2″) that is guided for displacement in a piston housing (4) and elastically... | 01/05/2010 |
| 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 |
| 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 |
| 7171930 | Rocker arm for valve actuation in internal combustion engines A rocker arm is disclosed for valve actuation in an internal combustion engine. The rocker arm includes at least two rotational axes which can be selected as desired to modify a relation between a force arm and a load arm. Control times and valve lift can thus be in... | 02/06/2007 |
| 7146954 | Hydraulic valve-lash-adjusting element A reverse spring hydraulic valve-lash-adjusting element for the valve train of an internal combustion engine having a plunger (1), in the plunger head (2) of which a control valve (5) is arranged, this control valve (5) controlling a cent... | 12/12/2006 |
| 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 |
| 7093575 | Pin housing sub-assembly for an hydraulic valve lifter An improved pin housing sub-assembly configured for reliable assembly and stability as an intermediate sub-assembly. The length of the plunger return spring is greater than the diameter of the spring well in the pin housing, such that the spring cannot be accidental... | 08/22/2006 |
| 7069888 | System and method for valve actuation The present invention is directed to a system and method for actuating an engine valve. In one embodiment, the present invention is a system for providing exhaust gas recirculation (EGR) in an engine having at least one engine valve, the system comprising: means for... | 07/04/2006 |
| 7047925 | Dual feed hydraulic lash adjuster An improved dual feed hydraulic lash adjuster (HLA), for use in an internal combustion engine, comprising a hollow body and a plunger assembly disposed in a bore of the engine. A one-piece plunger body includes a first chamber for forming a low-pressure oil reservoi... | 05/23/2006 |
| 6957634 | Engine valve actuator 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... | 10/25/2005 |
| 6948466 | Finger lever of a valve train of an internal combustion engine The invention proposes a finger lever (1) of a valve train of an internal combustion engine, said finger lever (1) being switchable to different valve lifts for at least one gas exchange valve and comprising an outer lever (2) having two arms ( | 09/27/2005 |
| 6901894 | Finger lever of a valve train of an internal combustion engine A finger lever (1) of a valve train of an internal combustion engine, said finger lever (1) being switchable to different valve lifts for at least one gas exchange valve and comprising an outer lever (2) having two arms (3a, 3 | 06/07/2005 |
| 6854433 | Integrated primary and auxiliary valve actuation system A system and method for actuating at least one engine valve in an internal combustion engine to produce an engine valve event is disclosed. The system of the present invention may comprise: means for imparting motion to the at least one engine valve for producing th... | 02/15/2005 |
| 6814039 | Valve-actuating devices for internal combustion engines having changeable stroke functions Valve actuating devices may include a pivot lever (8) having an abutment element (21) displaced from a bearing pin (6). The pivot lever is pivotable by a reciprocating push rod (54). An intermediate lever (26) is pivotably disposed... | 11/09/2004 |
| 6779497 | Valve stroke control for internal combustion engines of motor vehicles A valve stroke control for an internal combustion engine of a motor vehicle has a control device for adjusting a valve stroke. It interacts with a camshaft and a control shaft. The control device is actuated by a hydraulic medium and has a first control element and ... | 08/24/2004 |
| 6769387 | Compact two-step rocker arm assembly A rocker arm assembly includes an inner rocker arm and an outer rocker arm. The outer rocker arm includes two rail portions spaced a distance apart and forming an open space therebetween. The inner rocker arm is pivotably connected to the outer rocker arm such that ... | 08/03/2004 |
| 6732687 | Lash adjuster with locking balls deactivation A generally conventional lash adjuster is modified by incorporating a coaxially oriented hydraulic control piston assembly within the guide body. The control piston normally fixes latch means, such a plurality of hard spheres, in multiple detents loaded in compressi... | 05/11/2004 |
| 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 |
| 6612276 | Rocker arm for valve trains of internal combustion engines The rocker arm (2), obtained from a shaped element (30) made of metallic material, comprises surfaces (15,18) for engagement with a tappet (3) and with a stem (20) of a valve, respectively, and a portion (7) for mounting of a rotatable roller (8) able to ... | 09/02/2003 |
| 6612277 | Valve train assembly A rocker arm assembly for a valve train includes a hydraulic lash adjuster for accommodating slack in the valve train. There is also a lost-motion connection preferably between the axle of a roller which is operated upon by a cam and the rocker arm itself... | 09/02/2003 |
| 6598572 | Hydraulic lash adjuster A hydraulic lash adjuster has a plunger assembly the outer end of which can be moved inwardly until the inner end abuts a seal and closes a high pressure chamber, thus preventing further movement. This accommodates any necessary movement of a valve toward... | 07/29/2003 |
| 6591795 | Captive volume accumulator for a lost motion system The present invention is directed to an innovative, economical method or system disclosing a captive volume in a hydraulic circuit which can be selectively hydraulically or pneumatically locked, or vented in order to correspondingly maintain, or increase ... | 07/15/2003 |
| 6588387 | Rocker arm device for simultaneous control of valve lift and relative timing in a combustion engine A valve control system including a valve actuating camshaft (A), having a high lift cam (B) and a low lift cam (C), and an outer rocker arm (2) engaging the high lift cam, and an inner rocker arm (3) engaging the low lift cam. The ends of the rocker arms ... | 07/08/2003 |
| 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 |
| 6546904 | Electromagnetic actuator for the actuation of the valves of an internal combustion engine with recovery of mechanical play An electromagnetic actuator for intake or exhaust valves of an internal combustion engine, in which an oscillating arm has an end in abutment on the upper end of the stem of the intake or exhaust valve; two electromagnets being provided to move the oscill... | 04/15/2003 |
| 6543402 | Load biasing retainer clip and valve actuator subassembly A retainer clip includes a U-shaped body, first and second legs, and a resilient segment interconnecting first ends of the legs. The legs are adapted to resiliently engage opposite sides of a wall of a rockable actuator member. A second end of the first l... | 04/08/2003 |
| 6536391 | Compact hydraulic lash adjuster A hydraulic lash adjuster includes a leak down land and a support land that are substantially cylindrical. The support land is substantially coaxial relative to the leak down land, and at least a portion of the support land is disposed radially opposite t... | 03/25/2003 |
| 6532920 | Multipositional lift rocker arm assembly A multiple lift position rocker arm 307 is provided which includes a body 10 and a pivotally mounted lost motion arm 44. A latch 120 is connected on one end of the body to prevent pivotal movement of the arm 344 with respect to the body 10 in a first give... | 03/18/2003 |
| 6474277 | Method and apparatus for valve seating velocity control A system for controlling the seating of an engine valve is disclosed. The system is designed to bring a hydraulically actuated engine valve to a soft landing on its valve seat. The velocity of the engine valve is reduced as it approaches its seat by progr... | 11/05/2002 |
| 6439195 | Valve train apparatus A valve actuation device for an internal combustion engine having at least one combustion cylinder, a piston positioned within said cylinder for reciprocal motion therein; a pressurized hydraulic fluid gallery in a closed lubrication system; at least one ... | 08/27/2002 |
| 6427649 | Electromagnetic actuator of an improved type for controlling the valves of an internal-combustion engine Electromagnetic actuator of an improved type for controlling the valves for induction or exhaust of an internal-combustion engine, wherein an oscillating arm has a first end which is pivoted on a support frame which is secured to the head of the engine, a... | 08/06/2002 |
| 6422186 | Lost motion rocker arm system with integrated compression brake The present invention is directed to a system for operating at least one exhaust valve of an engine. The engine has at least two engine operating conditions. The system in accordance with the present invention includes an energy supply assembly for supply... | 07/23/2002 |
| 6415752 | Captive volume accumulator for a lost motion system The present invention is directed to an innovative, economical method or system disclosing a captive volume in a hydraulic circuit which can be selectively hydraulically or pneumatically locked, or vented in order to correspondingly maintain, or increase ... | 07/09/2002 |
| 6382150 | Desmodromic oscillating cam actuator with hydraulic lash adjuster A valve actuating mechanism includes opening and closing rotary cams rotatable together about a primary axis and a rocker pivotable about a first pivot axis spaced from the primary axis. The rocker includes first and second rocker arms connected to actuat... | 05/07/2002 |
| 6325034 | Hydraulic lash adjuster A hydraulic lash adjuster (11) disposed within a bore (14) defined by an internal combustion engine (16), the hydraulic lash adjuster (11) comprising a ball plunger (12) including a body portion (13), whereby the body portion (13) is reciprocable in the b... | 12/04/2001 |
| 6318325 | Hydraulic valve-play compensation element The invention relates to a hydraulic valve-play compensation element. The aim is to prevent any change in the length from taking place when the engine is at a standstill. To this end, the leakage oil is guided into the space between the high pressure valv... | 11/20/2001 |
| 6314926 | Valve control apparatus A valve control apparatus is provided for an internal combustion engine having a valve and a camshaft. The camshaft has an axis of rotation, a first lobe and a second lobe adjacent to the first lobe. The second lobe is angularly spaced-apart about the axi... | 11/13/2001 |
