Diesel Injector Shear Stability of Engine Oil - Factors Affecting Reproducibility and Relevance to Engine Performance Shell Development Company

Format:

Conference/Event

Author/Creator:

Rhodes, R. B., author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1992-10-19 : San Francisco, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1992

Summary:

Results from this study indicate that the reproducibility of the CEC Standard Test Method, CEC-L-14-A-88, a diesel injector mechanical shear stability test for engine lubricants, is not applicable to certain engine lubricants. The test is subject to a material bias which is caused by operational parameters-the allowance of a broad valve opening pressure range - and the use of a relatively insensitive calibration fluid. The magnitude of the bias depends on VI improver molecular weight and molecular weight distribution, as determined by gel permeation chromatography, otherwise known as size exclusion chromatography. The bias can be minimized or eliminated, however, by determining viscosity loss at a specified gauge pressure. It was thereby possible to improve reproducibility and obtain excellent correlations between diesel injector and both gasoline and diesel laboratory engine tests results

Notes:

Vendor supplied data

Publisher Number:

922193

Access Restriction:

Restricted for use by site license