| 摘要 |
A rocker arm assembly of the "roller finger follower" type for use in a valve train includes a rocker arm 46 having a socket 60 defined in a first end 48 by which the assembly is pivotably supported by the rounded end of a lash adjuster 44, and a recess 62 defined in a second end 50 with which to engage a valve stem 28. The socket 60 in the first end 48 of the rocker arm 46 is defined, in part, by a pair of diametrically-opposed flats 68. Each flat 68 is generally parallel to a respective reference plane (70, fig.2) that includes the geometric centres 72,74 of the socket 60 and recess 62 and, preferably, the flats are parallel with one another. Each flat 68 overlays a preferably cylindrical section of the lash adjuster 44 proximate to its rounded end 64. In the event of a cold engine start or other circumstance characterised by a tendency for the rocker arm 46 to roll about a longitudinal axis roughly defined by its first and second ends 48,50, the flats 68 engage the cylindrical section of the lash adjuster 44 to thereby limit the extent of such rolling.
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