Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-07-29
2008-07-29
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090390
Reexamination Certificate
active
07404385
ABSTRACT:
A lift-variable valve-operating system for an internal combustion engine, comprising: subsidiary cams which are swingably supported on a movable support shaft capable of being displaced within a plane perpendicular to a rotational axis of a valve-operating cam, and which are swung following the valve-operating cam; and rocker arms each operatively connected to an engine valve and operated following the subsidiary cams, operating characteristics including a lift amount of the engine valve being changed by displacing the movable support shaft, wherein the system further includes a control arm carried in an engine body to be capable of turning about a turning axis parallel to a rotational axis of the valve-operating cam, wherein the movable support shaft having an axis parallel to the turning axis of the control arm is retained on the control arm at a location offset from the turning axis, wherein a hydraulic tappet is mounted in the control arm to support one end of each of the rocker arms, and wherein a valve abutment portion provided at the other end of each of the rocker arms is in abutment against an upper end of a stem of the engine valve. Thus, it is possible to enhance the control accuracy in a state in which the lift amount of the engine valve is controlled to be low.
REFERENCES:
patent: 2002/0053326 (2002-05-01), Seitz et al.
patent: 2004/0261737 (2004-12-01), Rohe et al.
patent: 2006/0249109 (2006-11-01), Ezaki et al.
patent: 102 37 104 (2004-02-01), None
patent: 102 37 104 (2004-02-01), None
patent: 0 442 460 (1991-08-01), None
patent: 0 521 412 (1993-01-01), None
patent: 59-201913 (1984-11-01), None
patent: 2004-521234 (2004-07-01), None
patent: 2004-353650 (2004-12-01), None
patent: WO 2004/009967 (2004-01-01), None
patent: WO 2005/061864 (2005-07-01), None
(4) European Search Reports dated Nov. 2, 2007 through Nov. 5, 2007.
Tashiro Masahiko
Yonekawa Akiyuki
Eshete Zelalem
Honda Motor Co. Ltd.
Kratz Quintos & Hanson, LLP
LandOfFree
Lift-variable valve-operating system for internal combustion... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lift-variable valve-operating system for internal combustion..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lift-variable valve-operating system for internal combustion... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2776855