Valvetrain for an internal combustion engine, in particular of a motor vehicle
AssigneeDaimler AG
InventorMartin Mehring
Life of this patent
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Abstract
A valvetrain for an internal combustion engine has a camshaft rotatable about an axis of rotation, a sliding-block element connected in a rotationally fixed manner to the camshaft and displaceable in the axial direction of the camshaft relative thereto, which sliding-block element has an outer circumferential jacket surface with a shift gate via which a rotational movement of the sliding-block element can be converted into a displacement of the sliding-block element in the axial direction of the camshaft relative thereto, and a shift rod at least partially accommodated in the camshaft and displaceable by the sliding-block element in the axial direction of the camshaft relative thereto and via which shift rod an actuation of a gas exchange valve can be influenced.
Claims10
A valvetrain (10) of an internal combustion engine, comprising:
- a camshaft (12) rotatable about an axis of rotation (14);
- a sliding-block element (16) connected in a rotationally fixed manner to the camshaft (12) and displaceable in an axial direction of the camshaft (12) relative to the camshaft, wherein the sliding-block element has an outer circumferential jacket surface (20) with a shift gate (22) via which a rotational movement of the sliding-block element (16) is convertible into a displacement of the sliding-block element (16) in the axial direction of the camshaft relative to the camshaft;
- a shift rod (24) at least partially accommodated in the camshaft (12) and displaceable via the sliding-block element (16) in the axial direction of the camshaft (12) relative to the camshaft, wherein an actuation of a gas exchange valve is influenceable by the shift rod;
- a bushing (26), wherein a length region (38) of the sliding-block element (16) rotatable about the axis of rotation (14) relative to the bushing (26) is accommodated in the bushing (26) and wherein the bushing (26) is displaceable in the axial direction of the camshaft (12) relative to the camshaft;
- a form-fitting element (50) disposed on the bushing (26) and engaging in a slide region (42) of the shift gate (22) which is at least partially arranged in the length region (38);
- and
- a fixing device (54) which is switchable between an enabled state as a first state in which the fixing device (54) enables the displaceability of the bushing (26) relative to the camshaft (12) and a fixed state as a second state in which the displaceability of the bushing (26) in the axial direction of the camshaft (12) relative to the camshaft is suppressed by the fixing device (54);
- wherein the form-fitting element (50) moves along the slide region (42) upon a relative rotation between the sliding-block element (16) and the bushing (26) and, as a result of a switch-over of the fixing device (54) from one of the first and second states into the other of the first and second states with form-fitting interaction with the slide region (42), effects a displacement of the sliding-block element (16) in the axial direction of the camshaft (12) relative to the camshaft.
Dependencies are inferred from the claim text.