Oshkosh is a leader in the development of next-generation hybrid
propulsion systems in heavy trucks. ProPulse® is an unmatched
hybrid electric drive system that dramatically improves fuel economy,
reduces emissions, improves life cycle costs, and serves as an on-board
AC generator with enough output to power an entire airfield or hospital.
This leading-edge technology is the first significant step
toward the development of an entirely new generation of highly mobile
and incredibly efficient trucks. Our focus is on enhancing performance
characteristics while making trucks environmentally friendly,
said Charles L. Szews, Chief Executive Officer
The ProPulse system uses a unique, modular series-hybrid arrangement
to simplify the transmission of power to the wheels. The diesel
engine powers an electric generator, which provides direct power
to the wheels, eliminating the torque converter, automatic transmission,
transfer case and drive shafts. The system has no batteries, using
ultracapacitors for energy storage instead. A regenerative system uses the traction motors as generators for vehicle braking, storing the energy and then uses it during the next acceleration event, thus reducing wear and tear on the brake system.
ProPulse has applications for Oshkoshs entire line of products,
including defense, refuse hauling, fire and emergency, and other
commercial markets. Oshkosh has applied for patents on various aspects
of the ProPulse design.