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US 5,289,806 AGranted
Combustion engine with at least one camshaft which can be shifted axially
AssigneeAVL Gesellschaft fur Verbrennungskraftmaschinen und Messtechnik m.b.H. Prof. Dr. Dr. h.c. Hans List
InventorWilliam J. Hurr
Life of this patent
Estimating the term…
Abstract
To permit axial shifting of a camshaft dependent on its angle of rotation, a shifting device is used which includes a shifting profile made up of two guide grooves which are configured as oppositely oriented helixes and end in ring-shaped idling grooves, and further includes an engaging element which may be introduced into the guide grooves by an activating element.
Claims10
An internal combustion engine comprising:
- a cylinder head,
- at least one camshaft having a camshaft axis, said at least one camshaft being rotatable around said camshaft axis within said cylinder head and including several switchable cams for each of several valves, enabling a flow connection between a combustion chamber and one of two flow routes, whereby a first of said flow routes is a suction line and a second of said flow routes is an exhaust gas line, said cams being in different axial positions relative to each other,
- a shifting device to shift said at least one camshaft axially, said shifting device comprising a shifting profile consisting of at least two guide grooves which are configured as oppositely oriented helixes and which end in ring-shaped idling grooves, each of said idling grooves defining different operating positions of said camshaft,
- an engaging element running in one of said idling grooves and being introducible into said guide grooves, and
- an activating element to introduce said engaging element into one of said guide grooves.
2 more elements
Dependencies are inferred from the claim text.