Title:
EXHAUST VALVE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2015212543
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust valve for an internal combustion engine in which the strength of a valve seat area thereof is improved.SOLUTION: The exhaust valve for an internal combustion engine comprises a valve disc having a first side 14 and a second side, a valve stem extending from the first side 14 of the valve disc, and an annular valve seat area 11 located at the first side 14 of the valve disc. The annular valve seat area 11 is of a nickel-base alloy or a chromium-base alloy, and has a valve seat surface. The annular valve seat area 11 has at least a first annular portion 43 located between two second annular portions 42. The first annular portion 43 has lower hardness than the two second annular portions 42.
Inventors:
HARRO ANDREAS HOEG
CHRISTIAN SKAANING
CHRISTIAN SKAANING
Application Number:
JP2015078547A
Publication Date:
November 26, 2015
Filing Date:
April 07, 2015
Export Citation:
Assignee:
MAN DIESEL & TURBO DEUTSCHLAND
International Classes:
F01L3/02; B21H1/00; C22F1/10
Domestic Patent References:
| JPH09256821A | 1997-09-30 | |||
| JPH11270320A | 1999-10-05 |
Foreign References:
| WO2013186893A1 | 2013-12-19 |
Attorney, Agent or Firm:
Kurata Masatoshi
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi