Rocker arm
AssigneeSchaeffler Technologies AG & Co. KG
InventorOliver Schnell
Life of this patent
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Abstract
A rocker arm for a tappet pushrod valve train, which has a contact surface for a gas exchange valve on an underside at one end and a first bore in which a hydraulic lash adjusting element is arranged at another end. A second bore extends transverse through the rocker arm, between the ends. From the second bore, a passage leads to the first bore. A venting passage extends from a bottom of the bore at the another end and has an outlet aligned with the primary passage. A secondary passage branches from the venting passage and has an opening that extends to an upper side of the rocker arm and is situated in a longitudinal channel. The channel extends along the upper side and into a region on the one end. From the region, the hydraulic medium can be routed through an end passage to the contact surface.
Claims10
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.
Dependencies are inferred from the claim text.