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VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE

  • US 20150240671A1
  • Filed: 09/03/2013
  • Published: 08/27/2015
  • Est. Priority Date: 11/07/2012
  • Status: Active Grant
First Claim
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1. A variable valve device for an internal combustion engine, comprising:

  • intake and exhaust valves biased in respective valve close directions by spring forces of valve springs;

    a pair of intake- and exhaust-side swing arms that pivot to open and close the intake and exhaust valves, respectively;

    a pair of pivot members that serve as pivot points of the swing arms;

    a variable valve system that continuously varies a valve lift characteristic of the intake valve;

    a valve drive system that causes the exhaust-side swing arm to drive the exhaust valve at a constant valve lift; and

    lost motion mechanisms that stop opening and closing of the intake and exhaust valves by lost motion of the pivot members,wherein a maximum valve lift of the intake valve is set larger than the valve lift of the exhaust valve; and

    wherein a minimum valve lift of the intake valve is set smaller than the valve lift of the exhaust valve.

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