Finger lever of a valve train of an internal combustion engine

Details Finger lever of a valve train of an internal combustion engine Finger lever of a valve train of an internal combustion engine

2005-09-27

2005-09-27

Lo, Weilun (Department: 3747)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090410, C123S090420, C123S090440, C123S19800E

Reexamination Certificate

active

06948466

ABSTRACT:
The invention proposes a finger lever (1) of a valve train of an internal combustion engine, said finger lever (1) being switchable to different valve lifts for at least one gas exchange valve and comprising an outer lever (2) having two arms (3a, 3b) between which an inner lever (4) is arranged for pivoting relative to the outer lever (2), which outer and inner levers (2, 4) can be coupled to each other by a coupling means (15), the outer lever (2) comprising on one closed end (5), a support (5a) for a gas exchange valve and the finger lever (1) comprising on an opposite end (6), a complementary surface (7, 30) for a support element, the inner lever (4) having a fulcrum (10) in a region of the opposite end (6), and at least this inner lever (4) comprising a contact surface (11) for a cam. In the finger lever (1) of the invention, the outer lever (2) has a substantially open fork-like configuration, the contact surface (11) for the cam on the inner lever (4) is configured as a rotatable roller (12) and the coupling means (15) comprises at least one slide (16, 19, 22) that extends crosswise to a longitudinal direction of the finger lever (1), an axial line of the at least one slide (16, 19, 22) coincides with an axial line of the roller (12), and the fulcrum (10) of the inner lever (4) is situated at least approximately at a same point on a length of the finger lever (1) as a fulcrum of the outer lever (2) in a region of the complementary surface (7) of the finger lever (1). The switchable finger lever (1) of the invention has only a small design space requirement and a coupling mechanism of a relatively simple structure.

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