Running the Volkswagen Polo engine through a 40 h high-load - high-speed test cycle has proved to be a reliable screening test for evaluating different additives for intake-valve cleanliness. This engine has been found to be sensitive to the chemistry and composition of the additive.Apart from the detergent/dispersant component, additional partly detrimental effects on the intake-valve deposits due to corrosion inhibitors were observed.An optimized combination of detergent/dispersant, corrosion inhibitor and mineral oil carrier led to such low valve deposits that no need for a synthetic carrier could be shown.The engine was also adequate for evaluating the capabilities of different market gasolines to inhibit valve deposits.
Evaluating Gasoline Additives for Intake-Valve Cleanliness Using the Volkswagen Polo Engine
Sae Technical Papers
1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1989
1989-09-01
Conference paper
English
Optimization , Fuel additives , Valves , Reliability , Corrosion , Gasoline
Experience with the Volkswagen Polo Inlet Valve Cleanliness Test
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