Title:
DRIVE CAM AND VALVE OPERATING DEVICE FOR ENGINE
Document Type and Number:
WIPO Patent Application WO/2012/081198
Kind Code:
A1
Abstract:
Provided are a drive cam in which the wear resistance of a sliding surface is improved to achieve higher durability, and a valve operating device for an engine comprising the same. This drive cam (13a) is made of a nitrided steel, and has a cured layer formed by nitrocarburizing on the sliding surface, wherein the cured layer is present on the face of the sliding surface. A follower mechanism (33) used in combination with the drive cam preferably comprises, on a sliding surface for contacting the drive cam, a chromium plating layer and a diamond-like carbon membrane provided on the chromium plating layer.
Inventors:
KODAI AKI
ICHI SATOAKI
ISANO KOZO
ICHI SATOAKI
ISANO KOZO
Application Number:
PCT/JP2011/006823
Publication Date:
June 21, 2012
Filing Date:
December 06, 2011
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
KODAI AKI
ICHI SATOAKI
ISANO KOZO
KODAI AKI
ICHI SATOAKI
ISANO KOZO
International Classes:
F01L1/04
Domestic Patent References:
| WO2005021816A1 | 2005-03-10 |
Foreign References:
| JPS63167004A | 1988-07-11 | |||
| JPH1112685A | 1999-01-19 | |||
| JP2009209711A | 2009-09-17 | |||
| JP2004204762A | 2004-07-22 | |||
| JP2010156247A | 2010-07-15 | |||
| JP2009103083A | 2009-05-14 |
Other References:
See also references of EP 2653671A4
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)
Patent business corporation Owner old patent firm (JP)
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Claims:
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