Valve train of an internal combustion engine comprising a...

Details Valve train of an internal combustion engine comprising a... Valve train of an internal combustion engine comprising a...

2007-07-24

2007-07-24

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rod

C123S090350, C123S090480, C123S090550, C074S569000, C074S587000

Reexamination Certificate

active

11304461

ABSTRACT:
The invention proposes a valve train (1) 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 a pressure piston (5) of a hydraulic lash adjuster (6) of said tappet (7) that follows a periodic driving element such as a cam. A second support (9) for a follower member (2) such as 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), a one-way valve means (12) being installed in the tappet pushrod (1) for retaining a hydraulic medium column during a standstill of the internal combustion engine. In this way, an additional reservoir for hydraulic medium is created that serves for the rapid filling of the pressure piston (5) immediately after a re-starting of the internal combustion engine.

REFERENCES:
patent: 3144010 (1964-08-01), Van Slooten
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patent: 7077090 (2006-07-01), Sailer et al.
patent: 7174870 (2007-02-01), Rutsey
patent: 19 83 334 (1968-04-01), None
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patent: 33 43 324 (1984-06-01), None
patent: 10 2004 019 282 (2005-12-01), None

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