Device for varying the angular position of a camshaft relative to a crankshaft of an internal combustion engine

摘要

A device for varying the angular position of a camshaft relative to a crankshaft of an internal combustion engine. The device has a drive element, which is driven by the crankshaft via a gearwheel and which is supported so that it can rotate in relation to the camshaft. The device also has at least two hydraulic chambers, to which a hydraulic fluid can be admitted in order to set a defined relative rotational position between the drive element and the camshaft, formed between the drive element and the camshaft. In order to produce an optimum axial support of the camshaft in terms of weight and cost, the gearwheel form a bearing face for the axial contact of the camshaft or of a component rotationally fixed to the latter.

主权项

1. A device for varying angular position of a camshaft relative to a crankshaft of an internal combustion engine, the device comprising:
a drive element, which is driven by the crankshaft via a gearwheel and which is supported to be rotatable in relation to the camshaft; and at least two hydraulic chambers, to which a hydraulic fluid can be admitted in order to set a defined relative rotational position between the drive element and the camshaft, being formed between the drive element and the camshaft, wherein the drive element is supported to be rotatable in relation to the camshaft about an axis of rotation the device further comprising at least one cover arranged on an end face of the drive element, the gearwheel axially adjoining the cover and rotationally fixed to the cover, each of the drive element, the gear wheel, and the cover comprising a separate element, wherein an outside diameter of the gearwheel is smaller than an outside diameter of the drive element, the at least one cover being connected to the drive element by a first connection and the gear wheel being rotationally fixed to the cover by a second connection, the second connection being separate from and disposed radially inside the first connection relative to the axis of wherein the gearwheel forms a bearing face for the axial contact of the camshaft or of a component rotationally fixed to the camshaft; and wherein the gearwheel has a hollow cylindrical body and hollow cylindrical sections of reduced diameter adjoin the hollow cylindrical body axially on both sides, wherein the hollow cylindrical section facing the at least one cover has an annular groove-shaped undercut in an end face.