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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 (US)
CECIL ADAM C (US)
Application Number:
US2010/024405
Publication Date:
November 04, 2010
Filing Date:
February 17, 2010
Export Citation:
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Assignee:
CUMMINS INC (US)
BARNES DAVID M (US)
CECIL ADAM C (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. (One Indiana Square Suite 280, Indianapolis IN, US)
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