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Patent Searching and Data


Title:
VARIABLE VALVE ACTUATION APPARATUS, SYSTEM, AND METHOD
Document Type and Number:
WIPO Patent Application WO/2010/096432
Kind Code:
A3
Abstract:
A variable valve actuation system is disclosed, in one form a rocker is disclosed coupled with a valve stem at one end and a cam follower at the other end. The rocker is operable to pivot about a fixed axis. The cam follower is operable to be pivotally coupled with the rocker at one end of the cam follower. The cam follower includes a lower roller and an upper roller at its other end, each operable to engage cam lobes on separate cam shafts. In one form the cam follower includes a lower roller operable to follow a cam lobe on a lower cam shaft and an upper roller operable to follow a cam lobe on an upper cam shaft. The upper cam shaft and the lower cam shaft can have variable lobes. A spring can be used to bias the cam follower on the rocker.

Inventors:
BARNES, David, M. (5064 Brush Creek Drive, Columbus, IN, 47201, US)
CECIL, Adam, C. (5062 River Birch Drive, Columbus, IN, 47201, US)
Application Number:
US2010/024405
Publication Date:
November 04, 2010
Filing Date:
February 17, 2010
Export Citation:
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Assignee:
CUMMINS INC. (500 Jackson Street, Columbus, IN, 47202, US)
BARNES, David, M. (5064 Brush Creek Drive, Columbus, IN, 47201, US)
CECIL, Adam, C. (5062 River Birch Drive, Columbus, IN, 47201, US)
International Classes:
F01L13/00; F01L1/04; F01L1/18; F02D13/02
Foreign References:
JPS56107906U1981-08-21
KR950014401B11995-11-27
KR20010061177A2001-07-07
JPS59176411A1984-10-05
Attorney, Agent or Firm:
ALLIE, John, H. et al. (Krieg Devault LLP, One Indiana Square Suite 280, Indianapolis IN, 46204, US)
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