Exhaust valve for internal combustion engine

Details Exhaust valve for internal combustion engine Exhaust valve for internal combustion engine

1997-08-08

1999-05-18

Kwon, John T.

Internal-combustion engines

Valve

Reciprocating valve

1231889, 12318811, F01L3/04

Patent

active

059041250

ABSTRACT:
An internal combustion engine has a valve guide that is pressed into an opening in the cylinder head. An exhaust valve is slidably mounted in the bore of the valve guide. The exhaust valve has a head which is sized to cover the exhaust port, a stem which is slidably mounted in the valve guide so that the stem moves axially within the bore of the guide to open and close the valve head over the exhaust port, and a shank which extends between the valve stem and the valve head. The valve stem includes a recessed portion adjacent the valve shank. Except for the recessed portion, the valve stem is coated with a solid lubricant coating which is not capable of surviving repeated exposure to the hot exhaust gas passing through the exhaust port. The valve stem including the recessed portion remains located within the internal bore of the valve guide whenever the valve is opened or closed in such a manner that the recessed portion does not contact the bore of the valve guide. In this manner, the solid lubricant coating is protected from the harsh environment of the hot exhaust gases, yet the solid lubricant coating provides extended wear.

REFERENCES:
patent: 2403260 (1946-07-01), Charles
patent: 3809046 (1974-05-01), Kammeraad
patent: 4200066 (1980-04-01), Berchtold
patent: 4706967 (1987-11-01), Ochsner
patent: 4798181 (1989-01-01), Beer et al.
patent: 5295461 (1994-03-01), Rao et al.
patent: 5507257 (1996-04-01), Sakai et al.
patent: 5655493 (1997-08-01), Enright et al.
TRW Handbook for Internal Combustion Engines, TRW Inc., 1987.

Affiliated with

Also associated with

Rating

Exhaust valve for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust valve for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust valve for internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1753263