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Fuel Economy Advantage of 2-Speed Axles
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English
Abstract
The purpose of this paper is to describe comparative fuel economy testing of two-speed and single speed truck axles and to present data showing the fuel-saving capability of a two-speed versus a single speed axle. Fuel economy test results of a medium duty truck equipped first with a manual transmission and then with an automatic transmission, and both in combination with single speed and two-speed axles, is provided at varying gross vehicle weights. The two-speed axle with ratios straddling the ratio of the single speed provided substantial fuel savings when used as a transmission range extender at highway speeds.
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Authors
Citation
Chapman, L., "Fuel Economy Advantage of 2-Speed Axles," SAE Technical Paper 831798, 1983, https://doi.org/10.4271/831798.Also In
References
- Society of Automotive Engineers J1321 October 1980 Joint THC/SAE Fuel Consumption Test Procedure - Type II
- Joint TMC/SAE Task Force for In-Service Test Procedures of The American Trucking Industry Report of Frederick, Maryland Truck and Bus Fuel Economy Demonstration March 1982