Patent application number | Description | Published |
20100021721 | Composite material and method for the production of a composite material - A composite material and a method for the production of a composite material, in which the composite material has steel-like properties, at an increased modulus of elasticity, and a lower weight, and which can be produced in cost-advantageous manner. The composite material consists of ceramic particles, which are completely or partially sheathed with a metallic material, and partially or completely embedded in a metallic casting material. According to the method, ceramic particles are sheathed with a metallic material, and the ceramic particles sheathed in this manner are either embedded in a metallic casting material or sintered to form a steel matrix, which can also be embedded in a metallic casting material, if necessary. | 01-28-2010 |
20100139594 | Valve drive for activation of gas exchange valves of internal combustion engines - A valve drive for activation of gas exchange valves of internal combustion engines, with which valve stroke switching is accomplished with little effort, a low construction height, and at low switching forces. Incorrect switching and damage to the camshaft during valve stroke switching are avoided, even at high engine speeds of rotation. An adjustment shaft that is rotatable by the camshaft and parallel to the camshaft has two adjustment devices rotatably disposed on it, along with two tappets between the adjustment devices. The tappets are connected with a shift gate for valve switching between two different cam profiles of a cam package that is axially displaceable on the camshaft. The tappets each have a contour that contacts the adjustment devices via a guide pin. A gear wheel engages with a gear segment on the camshaft, via a drive on the adjustment shaft, to rotate the adjustment shaft. | 06-10-2010 |
20100186691 | Device for switching activation of a hydraulic valve play equalization element - A device for switching activation of a hydraulic valve play equalization element for setting of a maximal stroke or a zero stroke on a valve of an internal combustion engine, has a switching element for locking and unlocking the housing of the valve play equalization element relative to a guide that is axially displaceable therein. The switching element is a switching ring that surrounds the housing, on which a linkage for rotating the switching ring relative to the housing is disposed. The linkage of the switching ring is connected via a guide element with a groove on the circumference of a rotatable adjustment shaft. The groove has a groove section demonstrating an axial incline, and in which the switching ring is rotated, to implement a switching process via the guide element during rotation the adjustment shaft. | 07-29-2010 |
20110180029 | Valve drive for activation of gas exchange valves of internal combustion engines - A variable valve drive for internal combustion engines is used for activation of gas exchange valves, in which the gas exchange valves engage different cam profiles of a camshaft driven by the crankshaft of the internal combustion engine. The camshaft has at least one displaceable cam segment that carries multiple different cam profiles having the same base circle section. Each one of the cam profiles is switched to be active for the related gas exchange valve, in accordance with the axial position of the cam segment relative to at least one related gas exchange valve. The axial positioning of the cam segment takes place by a setting shaft that can be rotated and is disposed parallel and next to the camshaft. The setting shaft has a guide track in which a tappet is guided, which acts on a transfer element that determines the axial position of the cam segment. | 07-28-2011 |
20120037106 | VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve train for an internal combustion engine for actuating gas exchange valves includes a camshaft in the form of a camshaft tube driven by a crankshaft of the internal combustion engine. A selector shaft is disposed in the camshaft tube. A surface of the selector shaft includes a shifting contour having an axial gradient. At least one cam carrier is disposed on the crankshaft and axially displaceable but rotationally fixed with respect to the camshaft. Each cam carrier includes an identical base-circle portion and a plurality of cam profiles. A rotationally fixed but axially displaceable shifting sleeve is disposed between the camshaft tube and the rotatable selector shaft of each cam carrier. Each shifting sleeve includes a hole. A shilling ball is disposed in the hole of each shifting sleeve. The shifting ball ois coupled with the shifting contour of the selector shaft so as to be guided by the selector shaft so as to axially displace the shifting sleeve by rotation of the selector shaft. The shifting sleeve is operatively connected to the cam carrier via at least a driver for axial displacement of the cam carrier. | 02-16-2012 |
20120125273 | VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve train includes a a plurality of individual cam sleeves axially displaceable, relative to one another and disposed so as to form the camshaft, each of the plurality of individual cam sleeves including a plurality of different cam profiles each having a same base circle portion and being configured to engage, by switching, one of a plurality of gas exchange valves. A switching shaft is disposed inside the plurality of cam sleeves and configured to rotate together with the plurality of cam sleeves. An encircling switching contour is disposed inside each of the plurality of cam sleeves. A switching pin operatively connects one of the plurality of cam sleeves to the switching shaft, the switching pin configured to slide in the encircling switching contour. An actuator is operatively connected to the switching shaft so as to rotate the switching shaft relative to the plurality of cam sleeves. | 05-24-2012 |
20120125274 | VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve train for actuating a gas exchange valve of an internal combustion engine includes at least one camshaft configured to be driven by a crankshaft of the internal combustion engine and includes a camshaft tube. At least one cam support is disposed on the at least one camshaft so as to be rotationally engaged and axially displaceable, with respect to the at least one camshaft, the at least one cam support including an identical base circle portion and a plurality of cam profiles differing from one another. A switching shaft is disposed in the camshaft tube and is configured to rotate together with the camshaft tube. A dog operatively connects the at least one cam support to the switching shaft. A displacement piece is connected to the switching shaft and is configured to be rotationally engaged with and axially displaceable on the camshaft tube. | 05-24-2012 |
20120138001 | VARIABLE VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A variable valve train for actuating a plurality of gas exchange valves of an internal combustion engine includes a plurality of individual cam sleeves axially displaceable relative to one another and disposed so as to form the camshaft. Each of the plurality of individual cam sleeves include a plurality of different cam profiles. A switching shaft is disposed inside the plurality of cam sleeves and is configured to rotate together with the plurality of cam sleeves. A switching ball operatively connects one of the plurality of cam sleeves to a switching contour disposed on the switching shaft. A displacement piece is disposed so as to be rotationally engaged but axially displaceable on one of the plurality of cam sleeves and connected to the switching shaft. An actuator is operatively connectable to the displacement piece by the switching ball so as to displace the one of the plurality of cam sleeves. | 06-07-2012 |
20120291734 | VALVE TRAIN FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve train device for switching a lift of gas exchange valves of an internal combustion engine includes a camshaft. A cam group includes at least two cams disposed on the camshaft. At least one lever is mounted axially displaceably relative to the camshaft and is in contact with one of the at least two cams and includes an actuation region for a direct or indirect actuation of at least one gas exchange valve. An adjustment unit is operatively connected to the lever so as to displace the lever. The unit includes at least one rotatable adjustment shaft, at least one sleeve having at least one guide track mounted on the shaft non-rotationally and axially displaceably, an engagement element fixed to a housing and engaging permanently in the at least one guide track and supporting the at least one sleeve with respect to the housing, and a further engagement element | 11-22-2012 |
20130025554 | VALVE DRIVE FOR INTERNAL COMBUSTION ENGINES FOR ACTUATING GAS EXCHANGE VALVES - A valve drive device for switching the stroke of gas exchange valves of an internal combustion engine includes a camshaft configured, at least in part, as a hollow shaft. A cam unit includes at least two different cams disposed on the camshaft so as to be rotationally engaged and axially displaceable with respect thereto. An adjustment sleeve is disposed so as to be rotationally engaged on an adjustment shaft and rotatable and axially displaceable inside the camshaft. The adjustment sleeve includes thereon a closed adjustment contour extending about a circumference of the adjustment sleeve and is operatively connected to the cam unit through an adjustment clearance in the camshaft via a first coupling element configured to permanently engage in the adjustment contour. A further coupling element is configured to permanently engage in the adjustment contour and connect to the camshaft so as to be fixed in position. | 01-31-2013 |