Title:
LUBRICATION DEVICE OF VALVE SEAT PORTION IN INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/1990/001108
Kind Code:
A1
Abstract:
A lubrication device of a valve seat portion in an internal combustion engine in accordance with the present invention is constructed so as to form a lubricant film on a valve seat surface (7) of a seat ring (2) constituting a valve seat portion. The portion of the seat ring (2) forming the valve seat surface (7) is made of porous material (6, 9) which is easily impregnated with a lubricant and a ring-like groove (4) is formed in a circumferential direction of the outer peripheral surface of the seat ring (2). Furthermore, an oil path (5) for supplying a lubricant to the ring-like groove (4) is formed inside a cylinder head (1) to which the seat ring (2) is fixed. When the lubricant is supplied into the ring-like groove (4) through the oil path (5), the lubricant is caused to impregnate into the valve seat surface (7) of said seat ring as the portion (6, 7) made of the porous material and this impregnating lubricant forms a lubricant film on the valve seat surface (7) of the seat ring made of the porous material. This lubricant film minimizes wear of the valve seat and the valve seat surface.
Inventors:
SAITO MASAFUMI (JP)
Application Number:
PCT/JP1989/000736
Publication Date:
February 08, 1990
Filing Date:
July 24, 1989
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
F01L3/12; F01L3/22; F01M9/10; F02F1/24; F16N7/12; (IPC1-7): F01M9/10; F01L3/22; F01L3/12; F02F1/24
Foreign References:
| JPS52137210U | 1977-10-18 | |||
| JPS52111844U | 1977-08-25 | |||
| JPS5650711U | 1981-05-06 | |||
| JPS61108808U | 1986-07-10 |
Other References:
See also references of EP 0380695A4
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