Quote:
Originally Posted by PA32R
Cool, I'll be looking forward to it, Thanks  |
Papers: SAE Paper 770418 "An Analytical Study of Transmission Modifications as Related to Vehicle Performance and Fuel Economy",Engineering Staff General Motors Corp.--------------------------------------- within the body of the text they mention" a performance level of 13.5 seconds to accelerate from 0-60 mph will be assumed as being the vehicle requirement.This requirement was set forth by the Office of Air Programs of the Environmental Protection Agency in 1972 for several powertrain investigations."------------------------------- SAE Paper 730790 " Passenger Car Fuel Economy-Trends and Influencing Factors,by U.S.EPA.--------------------------------- within the text,they make mention" The effect on urban fuel economy due to a change in driver habits(approximated by changing the acceleration rates for the cycle driven) resulted in the following: doubling the nominal acceleration of 6 ft/s-squared to 12 ft/s squared resulted in approximately a 6% fuel economy penalty,while halving the acceleration to 3 ft/s-squared resulted in approximately an 8% gain in fuel economy.It can be seen that a more sedate approach to acceleration by the driver will improve his fuel economy."----------------------------- SAE # 750954 by GM shows a graph of mpg vs acceleration rate,slowing accel from 0-60 in 11-secs,to 0-60 in 13.5-secs,reduced consumption 1-gallon over a hundred miles for a 2800-pound car with a 228-cu in engine.------------------------------ SAE # 740620--------------------- a 1924 Chevy achieves 164-mpg,doing burn and coast (pulse and glide,momentum driving) by accelerating at WOT in high gear,from 3mph to 15mph,then coasting with engine off down to 3 mph.It took 6-cycles to cover a level mile,at 0.16 miles/cycle.1959 Opel achieved 376 mpg doing same thing.