Patent ID: 8408174
Filing Date: 2013-04-02
Classification: F01L,Y10T

Abstract:
1. A rocker arm for a tappet pushrod valve train, comprising: a longitudinal body having a first end, a second end, an upper surface and a lower surface; a contact surface for a gas exchange valve formed on the lower surface near the first end; a first bore formed in the lower surface, adjacent to the second end; a hydraulic lash adjusting element having a support for a tappet pushrod; a second bore, which allows for pivotal mounting of the rocker arm on an axle, extending transversely between the first end and the second end; a channel extending substantially along the upper surface to an end passage at the first end; a primary passage for hydraulic medium extending in the housing between the first bore and the second bore; a venting passage, which is in line with the primary passage, extending from the first bore to an outlet of the venting passage; a secondary passage, which branches off from the venting passage, extending outwardly from the first bore to an opening in an upper side, allowing the hydraulic medium to flow along the long channel in the upper body toward the first end of the surface such that the hydraulic medium can be directed from the end passage to the contact surface.