Valve train apparatus for 4 stroke-cycle internal combustion...

Details Valve train apparatus for 4 stroke-cycle internal combustion... Valve train apparatus for 4 stroke-cycle internal combustion...

2006-09-15

2008-12-02

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07458349

ABSTRACT:
A valve train apparatus of 4 stroke-cycle internal combustion engine includes an intake cam shaft, an exhaust cam shaft, an eccentric cam shaft, an intermediate lever, a rocker arm, and an intake valve. A lift of the intake valve is continuously varied by controlling rotations of the intake cam shaft and the eccentric cam shaft via the intermediate lever contacting the intake cam shaft and the eccentric cam shaft, and via the rocker arm contacting the intermediate lever. At least two of a parting surface of a bearing of the eccentric cam shaft, a parting surface of a bearing of the intake cam shaft, and a parting surface of a bearing of the exhaust cam shaft are arranged on a coplanar surface.

REFERENCES:
patent: 6497206 (2002-12-01), Nohara et al.
patent: 6955146 (2005-10-01), Werler
The Germany magazine Motortechnische Zeitschrift, Vieweg Verlag/GWV Fachverlage GmbH, Nov. 2004, pp. 868, 876 and 878.
The Germany public magazine BMW Aftersales, BMW Corporation, Nr. 75, p. 18.

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