Effect of acceleration rate on automatic transmission shift-speeds for two 1979 Novas. Technical report

Technical Report · Tue Jan 01 00:00:00 EST 1980

OSTI ID:6658283

Jones, R

Variations in acceleration rates will result in variations in vehicle fuel economy. If typical vehicle acceleration rates are distributed in the same manner as the accelerations are distributed on the EPA test cycles, or if the vehicle operational characteristics do not significantly change with acceleration rate, then results from the EPA cycles should be representative of average vehicle use. However, if vehicle operational characteristics change with changing acceleration rates, and if vehicle accelerations in consumer use are not distributed in the same manner as the accelerations of the EPA test cycle, then significant differences between EPA estimated fuel economy and actual vehicle fuel consumption may result. One vehicle characteristic which often changes with acceleration rate is the transmission shift speed for vehicles with automatic transmissions. To determine the effects of acceleration rates on transmission shift speeds, EPA recently conducted a short test sequence on two vehicles with automatic transmissions. These tests determined the relation between vehicle acceleration rate and transmission shift speed for acceleration rates from 1 to 6 mph/sec.

• Research Organization: Environmental Protection Agency, Ann Arbor, MI (USA)
• OSTI ID: 6658283
• Report Number(s): PB-80-196082
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AUTOMOBILES
ACCELERATION
FUEL ECONOMY
MECHANICAL TRANSMISSIONS
PERFORMANCE
AUTOMATION
FUEL CONSUMPTION
MOTOR VEHICLE OPERATORS
OPERATION
VELOCITY
ENERGY CONSUMPTION
MACHINE PARTS
VEHICLES
320203* - Energy Conservation
Consumption
& Utilization- Transportation- Land & Roadway