Two advanced design transmissions, one now in production (the Ford integral overdrive) and the other (Orshansky continuously variable) in prototype state of development, were evaluated to determine the increase in fuel economy achievable through the use of a transmission that would provide an improved engine speed/load relationship. The EPA Federal Test Procedure was used for the fuel consumption and emissions measurements. Ford Fairmont test cars, powered by a 302 CID engine, showed 13.8 percent and 17.6 percent increases in mileage for the Ford integral overdrive (FIOD) and the Orshansky continuously variable transmission (CVT) respectively when compared with the baseline C-4 transmission. While achieving the fuel economy gains, emissions increased slightly with the FIOD transmission and were lower (measured in a different car with modified engine) for the CVT equipped car. When tested using light truck inertia loadings, the FIOD continued to show 7 to 8 percent fuel economy improvements with no trend toward higher exhaust emissions. A production lead time for the CVT was estimated to be 4 to 4-1/2 years. Capital investment costs were estimated to be $261 million for the CVT and the incremental cost increase to the consumer was estimated to be in a range of $46 to $62 over the cost of the C-4 transmission. (ERA citation 09:004928)
Evaluation of Advanced Automobile Transmissions. Final Report, May 1978-February 1981
1981
112 pages
Report
Keine Angabe
Englisch
Improving Automobile Fuel Economy with Advanced Transmissions
Kraftfahrwesen | 1977
|Engineering Index Backfile | 1948
|Engineering Index Backfile | 1929
|Hydromechanical automobile transmissions
Engineering Index Backfile | 1960
|Final Scientific Report: 1978 - 1983
NTIS | 1983
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