Switchable bucket tappet for valve train of internal combustion engine, has annular projection protruding from outer casing of middle slide valve, and abutting on stop in borehole for representing decoupling position

摘要

The tappet (1) has a hollow-cylindrical projection (7) protruding from an inner edge (6) of an annular base (2). A slide valve packet is rearwardly displaced against a force of a pressure spring (24) during pressure application of a pressure chamber (23), so that foreheads (18, 21a, 21b) adjoin at a ring surface (19), and a base body (3) and a hollow cylindrical inner element (9) are decoupled. An annular projection (27) protrudes from an outer casing (26) of a middle slide valve (17), and abuts on a stop (28) in a borehole (16) for representing a decoupling position.