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Fuel Used to Accelerate Vehicles from Rest to Cruising Speeds
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English
Abstract
This research was performed to experimentally determine how the amount of fuel used to accelerate an initially stationary vehicle to a constant cruising speed depends on acceleration level. Initially stationary vehicles were accelerated at different rates to a constant cruising speed on a test track, and the amounts of fuel used to travel a fixed distance from the starting point were measured. By subtracting the amount of fuel that would have been required to travel this same distance at the cruising speed from the measured amounts, estimates of the additional fuel used to accelerate from standstill to the cruising speed were obtained. These estimates were then examined as a function of acceleration level, which was characterized by the time taken to reach the cruising speed. Tests were conducted for cruising speeds of 48 km/h, 64 km/h and 80 km/h. Factors investigated included different vehicles (8 in all), engines (L-4, V-6, V-8), and fuels (gasoline and diesel).
The experimental results suggest that, in order to save fuel when accelerating from rest to different cruising speeds, drivers should:
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1.
Take about 15 to 20 seconds to accelerate smoothly to a speed of 48km/h (use an average acceleration of about 0.8 m/s2 ).
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2.
Use only light pressure on the accelerator pedal while accelerating at speeds greater than 48 km/h (keep acceleration below 0.7 m/s2).
Drivers normally choose acceleration levels higher than those suggested above.
Authors
Citation
Evans, L. and Takasaki, G., "Fuel Used to Accelerate Vehicles from Rest to Cruising Speeds," SAE Technical Paper 810781, 1981, https://doi.org/10.4271/810781.Also In
References
- Motor Vehicle Manufacturers Association “Your Way to Better Fuel Economy,” a publicly available booklet October 1979
- Atlantic Richfield Company “The Road to Conservation,” a publicly available booklet
- U.S. Department of Energy “To Help You Save Gas,” a public pamphlet, Office of Conservation and Solar Applications Washington, D.C.
- Scheffler C. E. Niepoth G. W. “Customer Fuel Economy Estimated from Engineering Tests,” Society of Automotive Engineers, SAE Paper 650861 November 1965
- Waters M. H. L. Laker I. B. “Research on Fuel Conservation for Cars,” Transport and Road Research Laboratory, TRRL Laboratory Report 921, Crowthorne England 1980
- Jones R. “Quantitative Effects of Acceleration Rate on Fuel Consumption,” U.S. Environmental Protection Agency, Technical Report EPA=AA-SDSB-80-06 April 1980
- Everall P. F. “The Effect of Road and Traffic Conditions on Fuel Consumption,” Road Research Laboratory, RRL Report LR 226, Crowthorne, England 1968
- Chang M.-F. Evans L. Herman R. Wasielewski P. “Gasoline Consumption in Urban Traffic,” Transportation Research Record Washington, D.C 1950
- Chang M.-F. Herman R. “Driver Response to Different Driving Instructions: Effect on Speed, Acceleration and Fuel Consumption,” General Motors Research Laboratories, Research Publication GMR-3090 September 1979
- Evans L. “Driver Behavior Effects on Fuel Consumption in Urban Driving,” Human Factors 1979 21 4 389 398 (also available as GMR-2769)
- “Fuel Economy Measurement - Road Test Procedure - SAE J1082a,” Society of Automotive Engineers, SAE Recommended Practice, Approved March 1977