LATCH INTERFACE FOR A VALVE ACTUATING DEVICE

摘要

A novel latch seat for a switching rocker arm assembly used in variable valve actuation (VVA) systems for internal combustion engines. The seat is formed interactively in the assembled switching rocker arm using a novel fixture and press. The press interactively creates a curved dimple of the correct curvature, position and depth while measuring several lash dimensions. Since the latch seat is formed on the assembled rocker arm assembly, the latch seat depth is designed to account for the inaccuracies in the rocker arm assembly parts which create lash. Therefore all of the parts may be made with less precision since the latch seat is sized to compensate for the inaccuracies of all of the parts. The rocker arm assembly parts now may be manufactured to less stringent standards, but result in a rocker arm assembly with same accuracy of rocker arm assemblies manufactured to previous standards.

主权项

1. A manufacturing apparatus, comprising:
a base; a ball plunger post extending upward from the base, the ball plunger post having a size and a shape of a hydraulic lift adjuster (HLA) of a predefined engine; a valve stem post extending upward from the base, the valve stem post having a size and a shape of a valve stem of the predefined engine, the valve stem post having a position, a height and an orientation relative to the ball plunger post with relation to the HLA of the predefined engine; and a support shelf, wherein the manufacturing apparatus comprises a fixture sized and shaped to receive a switching rocker arm assembly for use in the predefined engine, the switching rocker arm assembly comprising a first end for pivoting and a second end for latching.