Valve train of an internal combustion engine comprising a tappet and a tappet pushrod
US7246589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Feb 9, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2152
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention proposes a valve train of an internal combustion engine comprising a tappet (7) and a tappet pushrod (1) that is actuated by said tappet (7), said tappet pushrod (1) being at least partly hollow and comprising on one end (3), a first support (4) for an at least indirectly contacting pressure piston (5) of a hydraulic lash adjuster (6) of said tappet (7) that follows a periodic driving element, typically a cam. A second support (9) for a follower member (2), typically a rocker arm, is arranged on a further end (8) of the tappet pushrod (1). The first support (4) comprises a passage (10) for hydraulic medium that can be routed out of the pressure piston (5) during operation of the internal combustion engine into an interior (11) of the tappet pushrod (1), wherein a pipette means (12) is installed in the tappet pushrod (1) for retaining a hydraulic medium column during a standstill of the internal combustion engine. Through the pipette means (12) of the invention, an additional volume of hydraulic medium is available for a rapid filling of the reservoir enclosed by the pressure piston (5) with pressure medium after a re-starting of the internal combustion engine, so that…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.