Title:
SINTERED VALVE SEAT
Document Type and Number:
WIPO Patent Application WO/2018/179590
Kind Code:
A1
Abstract:
In order to provide a sintered valve seat having exceptional valve-cooling performance that can be used in a high-efficiency engine, and that has exceptional deformation resistance, wear resistance, and fall-out resistance, a valve seat has a two-layer (seat layer/support layer) structure comprising a seat layer that repeatedly comes into contact with a valve face and a support layer that comes into contact with a bottom surface and inner peripheral surface of a valve seat press-fitting hole in a cylinder head. The seat layer contains at least one type of hard particles selected from Co-based hard particles and Fe-based hard particles in a matrix comprising Cu or a Cu alloy. The support layer includes at least one type of particles selected from Fe particles and Fe alloy particles in a matrix comprising Cu or a Cu alloy.
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Inventors:
HASHIMOTO KIMIAKI (JP)
Application Number:
PCT/JP2017/043303
Publication Date:
October 04, 2018
Filing Date:
December 01, 2017
Export Citation:
Assignee:
KK RIKEN (JP)
International Classes:
F01L3/02; B22F1/00; B22F1/10; B22F1/105; B22F5/10; B22F7/00; B22F7/02; C22C1/05; C22C9/00; C22C9/02; C22C19/07; C22C27/04; C22C38/00; C22C38/12; C22C38/22; C22C38/24; C22C38/36
Foreign References:
| JPH0233848B2 | 1990-07-31 | |||
| JP2015014262A | 2015-01-22 | |||
| JP2005256146A | 2005-09-22 | |||
| JP2004232088A | 2004-08-19 | |||
| JPS5671906U | 1981-06-13 | |||
| JPH07119421A | 1995-05-09 | |||
| JPH0360895A | 1991-03-15 | |||
| JPH10184324A | 1998-07-14 | |||
| JP3786267B2 | 2006-06-14 | |||
| JP4272706B2 | 2009-06-03 |
Other References:
See also references of EP 3406865A4
Attorney, Agent or Firm:
TAKAISHI Kitsuma (JP)
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