SWITCHABLE FINGER FOLLOWER WITH NORMALLY UNLOCKED COUPLING ELEMENT

摘要

A switchable finger follower having two lift modes for a valve train of an internal combustion engine. The follower includes a primary lever with a valve stem support at the first end and a support recess at the second end. A secondary lever is pivotably mounted to the primary lever at the first end, including a coupling surface. A coupling device is located on the primary lever having a coupling pin moveable between a first locking position, in which the secondary lever is locked to the inner lever, and an unlocked position, in which the secondary lever is pivotable relative to the primary lever. The coupling pin includes a ramp surface that engages the coupling surface, and a locking arrangement locks the coupling pin in the first locking position.

主权项

1. A switchable roller finger follower having at least two lift modes for a valve train of an internal combustion engine, comprising:
an primary lever having first and second ends, with a valve stem support located at the first end and a lash adjuster support recess located at the second end; a secondary lever mounted for pivoting movement to the primary lever at the first end of the primary lever by a pivot axle, the secondary lever including a cam contact surface, and a coupling surface facing the second end; and a coupling device located on the primary lever that includes a coupling pin arranged to move in a longitudinal direction between at least a first locking position, in which the secondary lever is locked to the primary lever at least in an activation direction of a valve, and an unlocked position, in which the secondary lever pivotable relative to the primary lever, the coupling pin including a ramp surface that engages the coupling surface, and a locking arrangement for locking the coupling pin in the first locking position.