Title:
内燃機関のための弁駆動装置
Document Type and Number:
Japanese Patent JP2005502808
Kind Code:
A
Abstract:
The invention relates to a valve mechanism for an internal combustion engine, comprising at least two inlet and/or outlet valves (EV1, EV2, AV1, AV2) per cylinder which can be activated by the inlet and/or outlet camshaft (8); in addition to lift transmission elements (4) which are arranged between the camshafts (6,7) of the inlet and/or outlet camshaft, and means for altering the valve lift of the inlet and/or outlet valves. At least two inlet valves and/or two outlet valves per cylinder cooperate with at least two partial cams (24, 25, 26) having two different lift curves, and the lift transmission elements (4) of the gas exchange valves are provided with at least two lift elements (22, 23) which respectively cooperate with the partial cams (24, 25, 26) and with the hydraulic supply lines for switching purposes. According to the invention, the supply lines (34, 44) for switching a first inlet or outlet valve (EV1, AV2) are separate from the supply lines (40, 48) for switching a second inlet or outlet valve (EV2, AV2), whereby a first inlet or outlet valve (EV1, AV1) can be switched independently from the second inlet or outlet valve (EV2, AV2). As a result two-step valve switching can be achieved in a simple manner.
Inventors:
Armin Yosenhans
Dietmar Schwarzental
Leo Spiegel
Dietmar Schwarzental
Leo Spiegel
Application Number:
JP2003527244A
Publication Date:
January 27, 2005
Filing Date:
August 22, 2002
Export Citation:
Assignee:
Dr.Ing.h.c.F.Porsche Aktiengesellschaft
International Classes:
F01L1/053; F01L1/14; F01L1/26; F01L1/34; F01L1/344; F01L13/00; (IPC1-7): F01L13/00; F01L1/14; F01L1/26
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel