VALVE SEAT FOR ENGINE, METHOD OF MANUFACTURING THE VALVE SEAT, AND CYLINDER HEAD FOR ENGINE

Title:

VALVE SEAT FOR ENGINE, METHOD OF MANUFACTURING THE VALVE SEAT, AND CYLINDER HEAD FOR ENGINE

Document Type and Number:

WIPO Patent Application WO/2005/031126

Kind Code:

A1

Abstract:

A valve seat for an engine capable of solving a problem with a conventional one wherein since an engine fuel formed mainly of alcohol may contain a rather large quantity of water as compared with conventional gasoline and light oil, there is the possibility of entry of water content in a clearance between an intake valve seat and the fitted receiving part of a cylinder head to which the valve seat is fitted when the engine fuel formed mainly of alcohol is led, together with air, into a cylinder through an intake port having the intake valve seat. A plating layer (14) is formed on the surface of a ferrous valve seat body (17) fitted to the fitted receiving part (13) formed in the intake port (6) of the aluminum alloy cylinder head (2). Since the plating layer (14) is provided between the cylinder head (2) and the valve seat body (17), galvanic corrosion can be prevented by reducing, through water, a potential difference between dissimilar metals, i.e., between the fitted receiving part (13) and the valve seat body (17).

Inventors:

MORIMOTO KOICHIRO (JP)
HANADA KUNIO (JP)
NISHIDA TAKASHI (JP)
SAKAI TOMOHIRO (JP)

Application Number:

PCT/JP2004/014334

Publication Date:

April 07, 2005

Filing Date:

September 30, 2004

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI MATERIALS CORP (JP)
MORIMOTO KOICHIRO (JP)
HANADA KUNIO (JP)
NISHIDA TAKASHI (JP)
SAKAI TOMOHIRO (JP)

International Classes:

B22F3/24; B22F5/00; F01L3/02; F01L3/04; F02F1/24; (IPC1-7): F01L3/04; F02F1/24

Foreign References:

JPH1136827A	1999-02-09
JPH0658116A	1994-03-01
JPH07133705A	1995-05-23
JPH0538304U	1993-05-25
JP2000297373A	2000-10-24

Other References: