| 摘要 |
The invention proposes a tappet ( 1 ) in a valve train of an internal combustion engine having a bottom camshaft for acting on a tappet push rod, said tappet being arranged with a housing ( 2 ) for axial displacement, but secured against rotation, in a guide bore ( 3 ) of the internal combustion engine ( 3 a) or of a component connected to the internal combustion engine, said housing ( 2 ) comprising on one front end ( 4 ), two cheek-like extensions ( 5 ) that are situated diametrically opposite each other and are connected by an axle ( 6 ) on which a rotary roller ( 7 ) extends for making direct contact with a cam, said front end ( 4 ) comprising a transverse region ( 8 ) that connects the extensions ( 5 ) axially inside and has a cylindrical shape in a length direction of the roller ( 7 ), and said guide bore ( 3 ) being intersected by two passages ( 12, 13 ) for routing hydraulic medium to the tappet ( 1 ), wherein a radius center point (M) of the transverse region ( 8 ) of the one front end ( 4 ) is situated with a lateral offset to a longitudinal axis of the tappet ( 1 ), so that one side ( 14 ) of a periphery of the housing ( 2 ) between the extensions ( 5 ) is distinctly longer than an opposite side ( 15 ), and the two passages ( 12, 13 ) are led to the housing ( 2 ) at least approximately on the longer one side ( 14 ) of the periphery.
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