Switchable cam follower

Details Switchable cam follower Switchable cam follower

1999-09-23

2000-12-26

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 905, 123 9055, 123198F, F01L 114

Patent

active

06164255&

ABSTRACT:
A switchable cam follower (1) for a valve train (1b) of an internal combustion engine (1c) which is indirectly actuatable via tappet push rods (1a), the cam follower (1) comprising an outer section (2) which encloses an inner section (4) that is axially movable relative thereto, the outer section (2) having a pot-shaped configuration with a bottom (6) which comprises an end (5) for cam contact and separates the inner section (4) from a cam (4a) whereby upon coupling of the sections (2, 4) by a coupling means (23), a high lift of a gas exchange valve (22a) is effected, and upon uncoupling of the sections (2, 4), a zero lift, the cam follower (1) having a relatively simple structure with only a small design space requirement and can be installed in receptions (20a) of the internal combustion engine (1c) as provided hitherto for non-switchable cam followers.

REFERENCES:
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patent: 5398648 (1995-03-01), Spath et al.
patent: 5402756 (1995-04-01), Bohme et al.
patent: 5431133 (1995-07-01), Spath et al.
patent: 5615651 (1997-04-01), Miyachi
patent: 5782216 (1998-07-01), Haas et al.
patent: 5934232 (1999-08-01), Greene et al.
patent: 6053133 (2000-04-01), Faria et al.

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