Wide ratio range automatic transmissions with lockup torque converters could be in production by the early 1980's. In order to evaluate their impact upon fuel economy, emissions, driveability, acceleration, and durability, four 1975 Chrysler automobiles with inertia weights and engine sizes typical of that time period were equipped with Multi-Purpose Test Transmissions. These transmissions could duplicate: current three-speed automatic transmissions; wide range three-speed automatic transmissions; and wide range four-speed automatic transmissions with or without torque converter lockup. Each of the test cars were evaluated in seven different transmission modes for fuel economy, emissions, driveability, acceleration, and durability. Fuel economy test results were compared to computer predicted fuel economies. Predicted values agreed with actual fuel economies within the resolution of the test method. Composite fuel economy improvements of up to 14 % were achieved with no cahnge in acceleration and durability. Further development work is required to bring emissions and driveability to acceptable levels. (Peters)
Evaluation of automobile drivetrain components to improve fuel economy
Bestimmung von Automobilantrieben zur Kraftstoffeinsparung
US Government Reports ; Mar ; 1-114
1979
114 Seiten
Report
Englisch
A Study to Validate Automobile Drivetrain Modifications that Improve Fuel Economy
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