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Parametric Simulation of the Fuel Consumption Effects of Engine Design Variation with Advanced Transmission Powertrains
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English
Abstract
A generic simulation study examines the fuel economy interrelationship between basic engine design parameters and the choice of transmission, emphasizing the implications on engine design of the use of optimally shifted, advanced transmissions. A new engine model and a vehicle simulation package were combined to assess, with both conventional and optimal shifting, the fuel economy effects, without octane or emissions constraints, of variation in bore-to-stroke ratio, compression ratio, cam timing, displacement, and friction level. The fuel economy interaction between the engine technology and the type of transmission was also assessed, using measured fuel flow information on a series of diesel and PROCO engines. In the course of this work, the fundamental factors which determine the fuel economy improvement associated with optimal shifting were identified. The fuel economy effects of engine changes were, in general, quantitatively similar for both conventionally and optimally shifted transmissions.
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Citation
Kuzak, D., Belaire, R., Le, S., and Brigham, D., "Parametric Simulation of the Fuel Consumption Effects of Engine Design Variation with Advanced Transmission Powertrains," SAE Technical Paper 841243, 1984, https://doi.org/10.4271/841243.Also In
References
- Scott D. Yamaguchi J. “First Production CVT For Early Launch” Automotive Engineering February 1984
- Blumberg P. N. “Powertrain Simulation: A Tool for the Design and Evaluation of Engine Control Strategies in Vehicles” SAE Paper 760158 1976
- Radtke R. R. Unnewehr L. E. Freedman R. J. “Optimization of a Continuously Variable Transmission with Emission Constraints” SAE Paper 810107 1981
- Mencik Z. Tobler W. E. Blumberg P. N. “Simulation of Wide-Open Throttle Vehicle Performance” SAE Paper 780289 1978
- Tuttle J. H. “Controlling Engine Load by Means of Early Intake Valve Closing” SAE Paper 820408 1982
- Pachernegg S. J. “A Closer Look at the Willans-Line” SAE Paper 690182 1969