Patent · US Expired

Valve train with hydraulic lash adjustment

US7077090B2 · kind B2 · utility

6Cited by

4References

4Claims

0Family size

Assignee

Ina Schaeffler KG · DE

Inventors

Peter Sailer · Erlangen, DE
Oliver Schnell · Weisendorf, DE
Friedrich Hieronymus · Willmersbach, DE

Key dates

Filing date	Apr 8, 2005
Grant date	Jul 18, 2006
Priority date	—
Expiry date	Apr 8, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2305/00
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Valve train with hydraulic lash adjustment in the entire timing train, in which oil is delivered from the oil supply space of the hydraulic valve-lash adjuster (HLA) to the valve rocker arm via a hollow push rod, a choke limiting the oil discharge, the choke being designed in such a way that it seals off the push rod bore at the top when the oil pressure drops, that is to say when the engine is shut off, so that the oil is retained in the push rod bore (12) until—after the engine is started—the choke body (15, 22) opens up the discharge opening again.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.