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| Number | Title | Issue Date |
| 8161930 | Camshaft for a variable lift valve train of an internal combustion engine A camshaft (1) is provided for a stroke-variable valve drive of an internal combustion engine with a carrier shaft (2) and a cam part (3) that is arranged locked in rotation and movable in the axial direction on the carrier shaft and that is ass... | 04/24/2012 |
| 8156910 | Concentric camshaft and method of assembly A camshaft assembly method may include locating a first lobe member of a camshaft assembly on a first shaft of the assembly. A locking pin may be inserted into a first radial bore in the first lobe member and a second radial bore of the first shaft. The locking pin ... | 04/17/2012 |
| 8113163 | Concentric camshaft and method of assembly A camshaft may include a first shaft, a stop member, and a first lobe member. The first shaft may include an outer radial surface having a first recess extending radially therein. The stop member may be axially fixed within the first recess. The first lobe member ma... | 02/14/2012 |
| 8104443 | Helical cam device and method A helical cam device for use with a wide variety of applications generally includes a first cam component, a second cam component and an axial guide. The cam components each have a helical cam track located on an axial end, so that coaxial alignment of the two cam c... | 01/31/2012 |
| 8096275 | Camshaft having a tuned mass damper A camshaft assembly may include a first shaft adapted to be rotationally driven, a first lobe member fixed for rotation with the first shaft, and a torsional damper fixed to the first shaft. The torsional damper may include a mass structure fixed to the first shaft ... | 01/17/2012 |
| 8051821 | Camshaft apparatus A camshaft apparatus includes rolling bearings which support a camshaft rotatably, whereby a reduction in torque when an engine is started or is running at low speeds, a reduction in vibration of the camshaft and an extension of the lives of the bearings can be real... | 11/08/2011 |
| 7992533 | Shaft with functional bodies such as camshafts for internal combustion engines, method of producing them and engines equipped therewith A shaft comprising functional elements, such as an assembled camshaft for an internal combustion engine, a method for producing such shafts, and internal combustion engines equipped with such shafts. The functional elements each have a bore and are produced separate... | 08/09/2011 |
| 7980217 | Valve train of an internal combustion engine A valve train of an internal combustion engine with at least one camshaft (1) on which at least one rotatable cam (2) is arranged fixed in the axial direction, wherein a rotationally fixed connection of the at least one cam (2) with the camshaft... | 07/19/2011 |
| 7966983 | Concentric camshaft with varying wall geometry and method of assembly A camshaft may include a first shaft, a first lobe member, and a second lobe member. The first shaft may include an annular wall defining a first bore. The wall may include a first portion having a first radial outer surface and a second portion having a second radi... | 06/28/2011 |
| 7958859 | Camshaft assembly A camshaft assembly is disclosed which comprises an inner shaft, an outer tube surrounding and rotatable relative to the inner shaft, and two groups of cam lobes mounted on the outer tube, the first group of cam lobes being fast in rotation with the outer tube, the ... | 06/14/2011 |
| 7895982 | Refurbished camshaft and method A method of refurbishing a camshaft (100) having at least one defective portion (202, 206) includes removing material from the at least one defective portion (202, 206) to create a neck region (302). An alignment feature (402) is i... | 03/01/2011 |
| 7866293 | Concentric camshaft with improved torque resistance An engine assembly may include an engine structure and a camshaft supported on the engine structure. The camshaft may include a first shaft, a first lobe member fixed to the first shaft and including a bore and first and second lobe portions that are axially spaced ... | 01/11/2011 |
| 7861682 | Systems and methods for managing camshaft torsional loading Systems and methods for managing camshaft dynamic loads associated with actuation of a camshaft-driven auxiliary device in a multiple-cylinder internal combustion engine apply positive and negative torque to the camshaft in a phased relationship relative to actuatio... | 01/04/2011 |
| 7849829 | Concentric camshaft with independent bearing surface for floating lobes A camshaft may include a first shaft, a first lobe member fixed to the first shaft, a second lobe member fixed to the first shaft, and a third lobe member. The first lobe member may include a first lobe portion and a first bearing portion extending axially from the ... | 12/14/2010 |
| 7819101 | Method and intake cam for retaining exhaust residuals for emissions reduction in a diesel engine A diesel engine intake cam profile creates two intake valve events separated by a short dwell period each engine cycle. A relatively low valve lift during an engine exhaust event allows a portion of the exhaust gas to flow into an intake manifold and mix with intake... | 10/26/2010 |
| 7802549 | Camshaft The present invention relates to a camshaft (1) which comprises an inner shaft (5) which is arranged coaxially in the outer shaft (6). Here, the outer shaft (6) is formed as a round cylindrical tube with a constant inner diameter (d) thro... | 09/28/2010 |
| 7775186 | Supporting structure for a camshaft, as well as methods for mounting and manufacturing a camshaft A cam lobe is formed as a single part, not formed together with a shaft body. The shaft body penetrates through bearing holes, as well as a mounting hole provided in the cam lobe, which is arranged in between adjacent bearing holes. The bearing holes each in a perfe... | 08/17/2010 |
| 7762225 | Valve train of an internal combustion engine comprising at least one camshaft The invention relates to valve train of an international combustion engine, which comprise axially displaceable cam elements. The inventive valve train is characterized in that one cam element comprises at least two cams which in turn comprise at least two cam track... | 07/27/2010 |
| 7707983 | Rolling bearing, cam shaft assembly and cam shaft supporting apparatus A cam shaft assembly is provided which includes a rolling bearing providing for effective oil feeding to a raceway. The assembly includes: a shaft 1; the rolling bearings 3 rotatably supporting the shaft 1; and cams 2 fitted on the shaft ... | 05/04/2010 |
| 7699032 | Camshaft of automotive combustion engines in particular With a camshaft for an automotive internal combustion engine in particular, having two concentrically arranged shafts mounted to rotate in opposite directions, namely an inside shaft (3) and an outside shaft (4),... | 04/20/2010 |
| 7628129 | Camshaft, method of manufacturing cam for camshaft, and method of manufacturing shaft for camshaft A method of manufacturing a cam for a camshaft, comprising the steps of continuously applying, to a billet having a volume larger by a specified volume than a final product, a plurality of cold forging steps formed of a preliminary outline upsetting, an outline draw... | 12/08/2009 |
| 7621245 | Camshaft The present invention relates to a camshaft (1) for more preferably motor vehicle engines with a termination element (2) arranged with an axial end side in or on the camshaft (1) and permanently joined to the latter which closes off the camshaft... | 11/24/2009 |
| 7610889 | Camshaft assembly including a target wheel A camshaft assembly including a target wheel is manufactured using an assembly process in which the camshaft is formed from a hollow tube. After the cam rings and a target wheel ring have been correctly positioned on the hollow tube, the tube is pressurized to expan... | 11/03/2009 |
| 7610890 | Camshaft with cams that can be rotated in relation to each other, especially for motor vehicles The aim of the invention is to provide a reliable and inexpensive camshaft wherein the inner shaft and the outer shaft can be adjusted in a low-friction manner. For this purpose, a camshaft with cams that can be rotated in relation to each other, wherein at least on... | 11/03/2009 |
| 7597078 | Camshaft The present invention relates to a camshaft (1) having cams (3 and 4) rotatable with respect to one another about the camshaft axis (2) over limited circumferential angles, whereby an inside shaft (5) and an outside shaft (6... | 10/06/2009 |
| 7588006 | Bearing between two coaxial camshafts for automotive engines in particular A camshaft for automotive engines in particular having contra-rotating cams capable of rotating over a limited circumferential angle about the camshaft axis in which an inside shaft (2) and an outside shaft (1) are ar... | 09/15/2009 |
| 7500456 | Cam connecting shaft and method of use The present invention is a novel non-splined shaft for connecting cam units (cam sections) in a series to construct a camshaft having zero degree backlash for use within an engine. Such engines typically use a camshaft comprised of a plurality of separate camshaft u... | 03/10/2009 |
| 7472671 | Valve engine A valve drive for an internal combustion engine having at least one camshaft which has a toothed shaft (2) and at least one cam part (3) with a plurality of different cam paths (13, 14) arranged adjacent to one another for the variable actuation... | 01/06/2009 |
| 7431002 | Camshaft with contrarotating cams for automotive engines in particular A camshaft has contrarotating cams for automotive engines, in which an inside shaft and an outside shaft are arranged concentrically so they are contrarotating, at least one cam has at least one main cam element that can be placed radially on the outside shaft and i... | 10/07/2008 |
| 7424877 | Internal combustion engine The invention relates to an internal combustion engine comprising a variable valve drive device provided with at least one camshaft having at least one cam arrangement. Said cam arrangement comprises a cam which can be displaced essentially radially in relation to t... | 09/16/2008 |
| 7421988 | Positive-guidance apparatus for conversion of a rotary movement of a drive to a reciprocating movement of a part A positive-guidance apparatus for conversion of a rotary movement of a driven cam element to a reciprocating movement of a part. The apparatus has a first cam area which pushes the part away in a first direction. A second cam area, which is formed on another cam pul... | 09/09/2008 |
| 7415951 | Valve timing mechanism of an internal combustion engine A valve timing mechanism of an internal combustion engine of a motor vehicle, having a camshaft having at least one cam (18), via which a switchable valve timing mechanism element (1) can be loaded with a cam stroke (s), in which locking means (12 | 08/26/2008 |
| 7404383 | Valve train with cam switching for the gas exchange valves of a four-cycle internal combustion engine A valve train with cam switching used for intermittent control of a four-cycle internal combustion engine. The valve train comprises a splined shaft, one cam block per cylinder, and a housing-mounted actuator pin. On each end of the cam block is a cylindrical end pi... | 07/29/2008 |
| 7392775 | Helical cam device and method A helical cam device for use with a wide variety of applications generally includes a first cam component, a second cam component and an axial guide. The cam components each have a helical cam track located on an axial end, so that coaxial alignment of the two cam c... | 07/01/2008 |
| 7363890 | Method and device for operating an internal combustion engine A method and a device for operating an internal combustion engine improve the response of the internal combustion engine and increase its torque. An exhaust valve of the combustion chamber of the internal combustion engine is opened during a discharge phase of the i... | 04/29/2008 |
| 7357108 | Valve-operating mechanism A valve operating system for an engine that includes a piston that reciprocates along a piston axis. The valve operating system includes a valve member that is movable along a valve axis between a first position and a second position and a crankshaft that is rotatab... | 04/15/2008 |
| 7341032 | Dynamic camshaft apparatus A dynamic camshaft apparatus includes, according to one embodiment, a moveable camshaft connected to an engine. The moveable camshaft has a first position when the engine is started and at low RPMs. Further, the moveable camshaft is conformed to move to different po... | 03/11/2008 |
| 7334550 | Valve train and cam lobe A camshaft for an internal combustion engine includes a cam lobe for actuating a valve. The cam lobe has an opening ramp profile that acts to loft the valve gear away from contact with the cam lobe to a maximum lift of the valve, with the valve gear returning to con... | 02/26/2008 |
| 7331319 | Cam hub mounting assembly A cam hub mounting assembly for a camshaft having a cam cover rotationally mounted within a cam cover retainer with a bearing retainer ring therebetween having a plurality of slots, each slot rotationally maintaining a ball bearing positioned in a smooth U-shaped gr... | 02/19/2008 |
| 7322330 | Method for linking element to hollow shafts, preferably for producing camshafts, and resulting camshaft A Method for the linking of cam rings to hollow shafts. In a first process step, the cam rings are manufactured, so as to generate their function-related contour, from two individual rings of different material connected to each other in a force-and form-closing man... | 01/29/2008 |
