Fundamental Parameters of Vehicle Fuel Economy and Acceleration

Study of technological improvements in automobile fuel consumption. Volume IIIB. Appendixed IV through VII. Final report, June 1973--January 1974

“…Results are summarized in Table 4-1 which shows fuel economy in MPG for federal driving cycle and steady speeds of 20,30,40,50,60 and 70 MPH. Also shown to right are tabulated values listing percent increase in MPG over the reference vehicle (Run 601) for the same o.perating conditions. These results are compared with those from runs on other reference cars in Table 4 The sequence of cumulative changes for this reference vehicle were based on a reduction of drag coefficient to 0.45, (a 4% reduction from the reference vehicle) rather than the usual 10% reduction since this vehicle has a lower than ordinary drag coefficient initially.…”

“…The diesel engine offers excellent fuel economy as a result of its high compression ratio (17)(18)(19)(20)(21)(22) and ability to burn lean fuellair mixtures.…”

“…These tables show for each case, the fuel economy in MPG for the Federal Drive Cycle and for steady speed level road driving at 20,30,40,50,60, and 70 MPH.…”

“…The following tabulation lists the various companies visited by SES representatives during this study and indicates the principal subject discussed and whether or not data supplied by them was used in the computer simulation studies. Data 20,30,40,50,60 and 70 miles per hour on level roads were selected as the operating conditions to evaluate for use as building blocks to assess the overall average customer fuel useage.…”

Analysis and Control of a Flywheel Hybrid Vehicular Powertrain

“…The fuel mass flow per unit engine power in stationary situations strongly depends on the operating point, i.e., on the engine speed and the torque or, alternatively, on and the throttle opening . The fuel efficiency in stationary situations can be improved by operating the engine along the E-line, being the set of operating points in which a required engine power is delivered with minimal fuel consumption ( [11], [18], [36], [41], [45]). Some papers [30], [33] not only take into account the efficiency of the engine but also of other powertrain components (torque converter, transmission, etc.).…”