The Impact of Intake Valve Deposits on Exhaust Emissions Oronite Technology Group, Chevron Research and Technology Company Richmond, CA

Format:

Conference/Event

Author/Creator:

Houser, K. R., 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:

This paper presents the results of a twenty- vehicle program designed to determine the functional relationship between intake valve deposit level and exhaust emissions. The "identical" 1990 model year vehicles used for this program had accumulated over 80,000 kilometers in taxi fleet service and had developed average intake valve deposit levels which ranged from 6 to 9 on the Coordinating Research Council merit scale.The exhaust emissions from these vehicles were measured in triplicate tests using the 1975 Federal Test Procedure. The intake valve deposits were then mechanically cleaned in-situ, and exhaust emissions were again measured in triplicate. Special procedures were followed to minimize vehicle-to- vehicle variability and to obtain statistically meaning ful results.Results showed intake valve deposits to have a significant adverse effect on exhaust emissions. The relationship between intake valve deposit ratings and tailpipe emissions was determined to be linear with heavier deposits causing higher emissions. While this program focused on one particular engine and vehicle model, it is expected that the observed effects are not unique

Notes:

Vendor supplied data

Publisher Number:

922259

Access Restriction:

Restricted for use by site license