Valve gear assembly for an internal-combustion engine
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorHarald Unger
Life of this patent
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Abstract
An internal-combustion engine comprises at least two inlet stroke valves per cylinder, the courses of the strokes of these stroke valves being adjustable in different manners. The adjustment takes place by means of an eccentric shaft which displaces the supporting point of a transfer element disposed between each cam and each stroke valve, in which case the two eccentrics assigned to one cylinder are of a different geometry. The transfer element is formed by a valve lever which is supported on the eccentric and is actuated by the cam, which valve lever, in turn, acts upon a rocker lever. The respective contact surfaces are formed by rollers. A further transfer element, which has a crank path, is also described.
Claims12
A valve gear assembly for an internal-combustion engine comprising:
- at least two stroke valves per engine cylinder,
- a cam for actuating each valve,
- an adjustable transfer device interposed between each cam and each valve for changing the respective strokes of the valves,
- wherein said transfer devices include transfer element supporting points which are adjustable via rotatable eccentrics disposed on a common eccentric shaft, and wherein elevation curves of the at least two eccentrics for the corresponding at least two valves of a cylinder differ from one another.
Dependencies are inferred from the claim text.