摘要:
A device for positioning multiple function elements having a recess for receiving a shaft in a predetermined angle position may include multiple mountings for receiving the function elements. The mountings may be equipped with a moulding establishing the predetermined angle position of the respective function element corresponding to the angle position on the shaft. The mountings may be positioned such that the recesses of the function elements lie on a common straight line. The mountings may be arranged vertically on top of one another so that the common straight line runs in vertical direction. A vertically moveable guide carriage for the shaft may be provided for joining the shaft with the function elements in vertical direction.
摘要:
An engine assembly includes an engine structure, a camshaft supported on the engine structure, a first cam phaser coupled to a first axial end of the camshaft, and a locating pin. The camshaft includes a first shaft, a second shaft, a first cam lobe and a second cam lobe. The first shaft defines a first opening. The second shaft is supported within the first shaft and defines a second opening. The first cam lobe is located on and fixed for rotation with the first shaft. The second cam lobe may be located on the first shaft and fixed for rotation with the second shaft. During assembly, the first cam phaser is located on the camshaft and the locating pin may be inserted through the first and second openings to rotationally fix the first and second shafts. The first cam phaser is then secured to the camshaft.
摘要:
A camshaft adjusting device of an internal combustion engine having two camshafts supported concentrically to one another, the axial position of the outer camshaft being determined by an axial bearing and the outer camshaft interacting with a sealing cover of an adjusting apparatus. A first cam is rotationally fixed to the outer camshaft. A second cam is rotationally fixed to the inner camshaft, which can be rotated relative to the outer camshaft by the adjusting apparatus, wherein the inner camshaft has a locking contour on at least one section of the outside of the inner camshaft, which locking contour engages in a form-closed manner in a mating contour on at least one section of the inside of the outer camshaft in order to fix the axial position of the inner camshaft relative to the outer camshaft.
摘要:
Reciprocating-piston internal combustion engine having a crank mechanism, with at least one cylinder head, the intake and exhaust ducts of which are controlled by in each case at least one gas exchange valve which is configured as an intake or exhaust valve, which gas exchange valves can be actuated by cams of at least one camshaft and by transmission elements which are driven by said cams, wherein the cams are configured as sliding cams with at least two cams per sliding cam unit, which sliding cams are arranged via internal splining on an externally splined basic shaft such that they are fixed so as to rotate with it but can be displaced axially, at least one device which is fixed to the internal combustion engine for displacing the sliding cam unit into different axial positions via displacement grooves on the circumference of the sliding cam unit which interact with an actuator pin, and bearings for fixing the camshaft radially and axially on a component of the internal combustion engine, wherein the basic shaft is guided by bearings on the component of the internal combustion engine.
摘要:
Embodiments in accordance with the present disclosure may provide a camshaft having a central oil passage and a radial passage to supply oil from the central passage to a bearing surface. The camshaft may include a filter disposed within the central passage which may allow oil to pass through the radial passage to the bearing surface, and which may prevent particles larger than a predetermined size to pass to the bearing surface.
摘要:
In an internal combustion engine a valve actuation control arrangement is provided, which has at least three independently axially displaceable cam elements and a switch gate which has at least one continuous gate track for displacing the at least three cam elements sequentially one after the other.
摘要:
A valve drive for an internal combustion engine, wherein in order to activate gas exchange valves at least one camshaft having at least one sliding cam which can be displaced axially on the camshaft is provided, wherein the respective sliding cam has a sliding block section with a plurality of grooves which are formed on an outer lateral face and are positioned one behind the other on the circumference, wherein in order to bring about displacement of the respective sliding cam an actuator is provided with a first pin for displacement in the two directions about a first axial segment and a second pin for displacement in the two directions about a second axial segment. The sliding block section is manufactured in certain sections from a material with a relatively high electrical conductivity and in certain sections from a material with a relatively low electrical conductivity.
摘要:
An internal combustion piston engine having gas exchange valves actuated by cams of a camshaft. The cams are sliding cams having two cams per sliding cam unit situated on a basic shaft in rotationally fixed fashion but axially displaceable. At least one actuator unit has two actuator pins for displacing the sliding cam units into different axial positions using displacement grooves on the circumference of the sliding cam units, the grooves being helical and situated mirror-symmetrically, and having an ejection ramp for the actuator pins. The actuator pins are spring-loaded toward the sliding cam unit and, in retracted positions, can be fixed by arresting devices, which have control needles that correspond to clamping bodies of locking devices. These needles are actuatable by an electromagnet unit, with the control needles being connected with a needle bridge. A pin engages the needle bridge, and the pin is controlled by the electromagnet unit.
摘要:
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 camshaft 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 is 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.
摘要:
A camshaft assembly for an internal combustion engine has a hollow outer shaft with slots along its length and an inner shaft with holes along its length. The holes on the inner shaft are aligned with the slots on the outer shaft. A first set of cam lobes are fixed to the outer shaft and a second set of cam lobes are placed on the slots of outer shaft with a clearance fit. A means fixes the second set of cam lobes to the inner shaft, while simultaneously allowing the second set of cam lobes to be a clearance fit to the outer shaft. The means fixing the second set of cam lobes to the inner shaft may be a hollow pin which is hydroformed or a rivet insert which is expanded by insertion, pulling, and removal of a threaded rod.