Tappet for a switchable valve of an internal combustion engine

Details Tappet for a switchable valve of an internal combustion engine Tappet for a switchable valve of an internal combustion engine

1995-12-06

1997-02-18

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9048, 123198F, F01L 112

Patent

active

056032935

ABSTRACT:
A tappet for a switchable valve includes a switching device having a clutch member which can be displaced by a hydraulically acted-upon piston and by means of which the valve is switched off in a second switching position and is activated in a first switching position. In order to permit low-friction defined switching movements of the clutch member and the tappet, the clutch member is in each case locked by means of a respective locking device in its end positions assigned to one switching position respectively. The locking device is operative in the respective end position of the clutch member and can be unlocked by the valve stem.

REFERENCES:
patent: 4770137 (1988-09-01), Okabe et al.
patent: 5361734 (1994-11-01), Shirai
patent: 5402756 (1995-04-01), Bohme et al.
patent: 5488934 (1996-02-01), Shirai et al.

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