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Coordinating Research Council Ford 2.3L Intake Valve Deposit Test - Interlaboratory Study
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Abstract
In response to industry demands for a method to qualify fuels for their intake valve deposit (IVD) forming tendencies, the Coordinating Research Council (CRC) has developed an engine dynamometer test procedure. In Phase I, the 2.3L Ford engine was chosen as the focus test engine in comparison testing with two other high volume U.S. manufactured engines.1* A two-mode dynamometer test was developed in Phases II-A & II-B and shown to discriminate among the test fuels at a 95% confidence level.2
In Phase III, both an interlaboratory study (ILS) of the two-mode dynamometer test and a vehicle fleet study were performed. The ILS was conducted to determine the repeatability and reproducibility of the test procedure and also to fulfill requirements for consideration of the test as an American Society for Testing and Materials (ASTM) standard. To determine how the dynamometer test relates to a typical on-road vehicle test using identical fuels, a four car study was performed using the ASTM D 5500-94 IVD Test Procedure following the completion of the ILS. This procedure is a derivative of the existing SwRI/BMW 16000 km vehicle test.3 The description and analysis of the Phase III program is the focus of this paper.
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Bannon, S., Ahmadi, M., Buckingham, J., Corkwell, K. et al., "Coordinating Research Council Ford 2.3L Intake Valve Deposit Test - Interlaboratory Study," SAE Technical Paper 961099, 1996, https://doi.org/10.4271/961099.Also In
References
- Bannon S.A. Scherer G.O. Swaynos D.V. “Selection of an Engine Standard for Development of a CRC Intake Valve Deposit Test,” SAE Paper No. 922260 Society of Automotive Engineers Warrendale, PA 1992
- Bannon S.A. Avery N.L. Bitting W.H. Carlson C.A. Daly D.T. Fuentes-Afflick P. Schoppe D.R. Swaynos D.V. “Development of a CRC Intake Valve Deposit Test,” SAE Paper No. 940348 Society of Automotive Engineers Warrendale, PA 1994
- ASTM D 5500-94 “Standard Test Method for Vehicle Evaluation of Unleaded Automotive Spark-Ignition Engine Fuel for Intake Valve Deposit Formation” 5.03 American Society for Testing and Materials Conshohocken, PA 1996
- Evans B Graham J.P. “Effects of Intake Valve Deposits on Driveability,” SAE Paper No. 922220 Society of Automotive Engineers Warrendale, PA 1992
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- Shibata G. Nagaishi H. Oda K. “Effect of Intake Valve Deposits and Gasoline Composition on S.I. Engine Performance,” SAE Paper No. 922263 Society of Automotive Engineers Warrendale, PA 1992
- Bitting W. H. Gschwendtner F. Kohlhepp W. Kothe M. Testroet C.J. Ziwica K.H. “Intake Valve Deposits - Fuel Detergency Requirements Revisited,” SAE Paper No. 872117 Society of Automotive Engineers Warrendale, PA 1987
- Coordinating Research Council “Proceedings of the CRC Workshop on Intake Valve Deposits, August 22-24, 1989” Coordinating Research Council Atlanta, GA 1989
- American Society for Testing and Materials Subcommittee D02.A Dynamometer IVD Test Method Task Group “Standard Test Method for Dynamometer Evaluation of Unleaded Spark-Ignition Engine Fuel for Intake Valve Deposit Formation,” American Society for Testing and Materials Conshohocken, PA 1995
- ASTM D 5500-94
- SAE No. 922260
- SAE No. 940348
- Coordinating Research Council “Carburetor & Induction System Rating Manual,” Coordinating Research Council Atlanta, GA 1987