Title:
VARIABLE VALVE ACTUATION APPARATUS, SYSTEM, AND METHOD
Document Type and Number:
WIPO Patent Application WO/2010/096437
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 rotate about a fixed axis. In one form the cam follower includes a set of lower rollers operable to follow one cam lobe and an upper roller operable to follow another cam lobe. A leaf spring can be used to couple the cam follower with the rocker. A cam shaft is disclosed having a nested configuration that includes an inner shaft, an intermediate tube, and an outer tube. Cam lobes can be fastened to the cam shaft in one form by fastening through each of the inner shaft, intermediate tube, and outer tube. In another form the cam lobes can be attached by at least two devices inserted from either side of the cam shaft and that are not inserted at least through the inner shaft.
Inventors:
BARNES DAVID M (US)
CECIL ADAM C (US)
LAPOINTE LEON (US)
CECIL ADAM C (US)
LAPOINTE LEON (US)
Application Number:
PCT/US2010/024414
Publication Date:
October 21, 2010
Filing Date:
February 17, 2010
Export Citation:
Assignee:
CUMMINS INC (US)
BARNES DAVID M (US)
CECIL ADAM C (US)
LAPOINTE LEON (US)
BARNES DAVID M (US)
CECIL ADAM C (US)
LAPOINTE LEON (US)
International Classes:
F01L13/00; F01L1/04; F01L1/18; F02D13/02
Foreign References:
| JPS56107906U | 1981-08-21 | |||
| KR950014401B1 | 1995-11-27 | |||
| KR20010061177A | 2001-07-07 | |||
| JP2002054410A | 2002-02-20 |
Attorney, Agent or Firm:
COLLIER, Douglas, A. et al. (One Indiana Square Suite 280, Indianapolis IN, US)
Download PDF: