Engine Test Procedures to Evaluate Octane Requirement Increase and Intake System Cleanliness 892122
As a vehicle accumulates mileage, deposits begin to build up in the intake system. These deposits, especially those on the intake valves, may cause poor cold start driveability, losses in power and fuel economy. Modern gasolines have multi-functional additives to provide all-around performance in areas of detergency, corrosion inhibition, stability, etc. Some of these gasoline additives may inadvertently cause unusually high increases in intake valve deposits and adversely affect the octane requirement of the engine. Dynamometer engine test procedures have been developed to evaluate the performance of gasoline additives in these areas. This paper describes the details of the test procedures, their repeatability and typical test results.
Citation: Eng, K., Carlson, C., Hayden, T., and Sung, R., "Engine Test Procedures to Evaluate Octane Requirement Increase and Intake System Cleanliness," SAE Technical Paper 892122, 1989, https://doi.org/10.4271/892122. Download Citation
King D. Eng, Craig A. Carlson, Thomas E. Hayden, Rodney L. Sung
Texaco Research Center
1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Fuel and Induction System Deposits-SP-0797, SAE Transactions Journal of Fuels and Lubricants-V98-4