FUEL EFFICIENT FOUR-BY-FOUR VEHICLES OF THE EIGHTIES
A four-by-four is a vehicle with four wheels on the ground and four wheels capable of driving. It is used for work, recreation, and/or personal transportation. The drive system of a four-by-four usually consists of the addition of a front drive/steer axle and transfer case to the power transmission system of a two-wheel rear-drive vehicle. The transfer case is an auxiliary gearbox which is mounted either directly to the main transmission or remotely to the vehicle chassis. It is connected to the rear drive axle via another propeller shaft. A front driveshaft disconnect is included in the transfer case of a conventional four-wheel-drive system. It converts the system to two-wheel drive by directing power only to the rear axle. The paper covers: 1) Changes in the four-by-four market; 2) the effect of federal regulation on four-wheel-drive vehicle manufacturers; 3) an overview of E.P.A. fuel economy testing; 4) suggestions for reducing vehicle fuel consumption; and 5) a prototype of a fuel-efficient four-wheel-drive vehicle.
- From the 11-14 December 1978 Meeting.
Warrendale, PA USA 15096
- Spearman, L W
- Raffa, J
- Publication Date: 1978-12
- Features: References;
- Pagination: 11 p.
- Society of Automotive Engineers Preprint
- Publisher: Society of Automotive Engineers
- TRT Terms: Automobiles; Economic efficiency; Four wheel drive; Fuel conservation; Fuel consumption; Recreational vehicles; Transmissions; Vehicle tests
- Identifier Terms: U.S. Environmental Protection Agency
- Uncontrolled Terms: Efficiency
- Old TRIS Terms: Epa automobile tests; Transfer cases
- Subject Areas: Economics; Energy; Highways; Vehicles and Equipment;
- Accession Number: 00195296
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: SAE 781061
- Files: TRIS
- Created Date: Aug 15 1979 12:00AM