Camshaft Surface Temperatures in Fired-Gasoline Engines Chevron Research and Technology Company Oronite Technology Division Richmond, California

Format:

Conference/Event

Author/Creator:

McGeehan, J. A., author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1990-10-22 : Tulsa, Oklahoma, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1990

Summary:

The authors measured camshaft surface temperatures in two different gasoline engines: a Ford 2.3-liter overhead-camshaft engine with finger-follower and an Oldsmobile V-8 5.7-liter engine with rotating tappets and pushrods.Using unique surface thermocouples in the cam-lobes, we found that maximum cam-lobe temperatures occur at the cam-nose and increase linearly with speed and oil temperature. At high speed, the rotating tappet produced lower temperatures than the finger-follower.In addition, at maximum speed the cam-lobe temperatures in the ASTM Sequence V-D and IIID tests were similar--200°C. The similarity in these surface temperatures explains why both engines require similar zinc dithiophosphates (ZnDTP) for wear control. The surface temperature controls the surface chemistry

Notes:

Vendor supplied data

Publisher Number:

902162

Access Restriction:

Restricted for use by site license