Internal-combustion engines – Valve – Guide – lubricant – or coolant
Patent
1994-05-20
1995-07-25
Yuen, Henry C.
Internal-combustion engines
Valve
Guide, lubricant, or coolant
29888061, F01L 308
Patent
active
054352800
ABSTRACT:
In order to achieve great engine efficiency, heat, normally dissipated through the cooling system, is directed through the exhaust passage to increase the turbocharger speed. Ceramic valve guides capable of withstanding high temperature ranges are being used for increased engine efficiency. Unfortunately, the resultant interference fit achieved through conventional shrink fitting the ceramic valve guide into the cylinder head will be lost once the engine is at operating temperatures due to the differential thermal expansion between the ceramic and the cylinder head material. The present invention provides a simple means for ensuring that the ceramic valve guide will be mounted within a cylinder head in a way that ensures that the ceramic valve guide is held in place within the cylinder head throughout the operating cycles of the engine. This is accomplished by utilizing a securing assembly which circumferentially surrounds the ceramic valve guide. The securing assembly includes a lower and an upper securing element and a spring disposed between the lower and the upper securing element. When installed in the engine, a valve spring places an axial load on the securing element which compresses the spring and forces the lower and the upper securing element into radial engagement with the ceramic sleeve and the cylinder head. Thereby, forcibly connecting the ceramic valve guide and the cylinder head.
REFERENCES:
patent: 3809046 (1974-05-01), Kameraad
patent: 4688527 (1987-08-01), Mott et al.
patent: 5207196 (1993-05-01), Koonen et al.
patent: 5237103 (1994-12-01), Hackett et al.
patent: 5313917 (1994-05-01), Santi
Exhibit A-Ringfeder Shaft-Hub Locking Devices-Locking Elements RfN 8006 and GSA-Series-Ringfeder Corporation, Arlington Hts., Ill.
Hackett David E.
Haselkorn Michael H.
Caterpillar Inc.
Charlton Diana L.
Solis Erick
Yuen Henry C.
LandOfFree
Method of mounting a ceramic valve guide assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of mounting a ceramic valve guide assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of mounting a ceramic valve guide assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-733618