Donald Paul Pfaff

Network

Latest external collaboration on country level. Dive into details by clicking on the dots.

Explore More

Hotspot

Dive into the research topics where Donald Paul Pfaff is active.

Explore More

Publication

Featured researches published by Donald Paul Pfaff.

Proceedings of the Institution of Mechanical Engineers. Part D, Journal of automobile engineering | 2004

G Y Liao; Trudy R. Weber; Donald Paul Pfaff

Abstract Four concepts of strong hybridization powertrains on all-wheel-drive sport utility vehicles are presented. These concepts enable conversion of conventional powertrains into strong hybrid powertrains with minimal tear-up to the existing architecture. The first concept incorporates an electric machine attached to the output side of a conventional transmission. The second concept is a strong input power-assist system, where the motor is packaged between the torque converter and the transmission. The third concept is similar to the second one, but the torque converter is replaced by a starting clutch. The fourth concept is a compound-input, power-split, electric-variable transmission (EVT). These concepts provide extensive hybrid functionality, such as motor-only drive, launch assist, and energy recuperation. Simulation results indicate that proposed strong hybrid concepts can result in fuel economy gains of 19-26 per cent over conventional powertrains.

2004 ASME International Mechanical Engineering Congress and Exposition, IMECE | 2004

Gene Y. Liao; Trudy R. Weber; Shawn D. Sarbacker; Donald Paul Pfaff

This paper describes four conceptual designs of strong hybrid vehicle powertrains. These concepts enable conversion of conventional powertrains into strong hybrid powertrains with minimal tear-up to the existing architecture. These concepts are configured as follows: (1) incorporates an electric machine attached to the front axle of a conventional rear-wheel-drive vehicle; (2) a Flywheel-Alternator-Starter (FAS) system with a motor placed between the torque converter and the transmission; (3) same as previous one but where the torque converter is replaced by a starting clutch; and (4) a dual mode Electric Variable Transmission (EVT). These concepts provide extensive hybrid functionality such as, electric motor-only drive; launch assist, braking energy recovery and regeneration. Simulation results indicate that the proposed strong hybrid concepts have the potential to provide fuel economy gains of 19% to 26% over conventional powertrains.Copyright

Archive | 1990