|The ProPulse hybrid system applied in a tactical vehicle. Click to enlarge.|
Oshkosh Truck Corporation is presenting its proprietary ProPulse series-hybrid drive technology in a refuse vehicle application at the 2006 Hybrid Truck Users Forum (HTUF) during the 6th National HTUF meeting being held in San Diego, California, 14-16 November.
The OshKosh ProPulse system, which is also designed for application in military vehicles, uses a modular series-hybrid arrangement. 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 uses ultracapacitors for energy storage rather than batteries. A regenerative braking function stores engine energy and then uses it to assist in the next braking operation, reducing wear and tear on the brake system.
The ProPulse hybrid drive system helps the engine to operate at the optimum operating point for required energy demand, providing increased fuel economy, reduced emissions, lower life-cycle costs and lower interior and exterior noise profiles.
As designed for the refuse application, the ProPulse system combines a 300 hp diesel engine with a 225 kW generator and ultracapacitors (1.4 MJ) to drive two 140 hp traction motors. The modular hybrid system allows for electrification of ancillary systems and accessories.
We are extremely excited to introduce this remarkable technology to the refuse market. Our ProPulse hybrid drive system could significantly reduce fuel costs. During extensive customer field tests, it has shown improved fuel efficiency of 20 to 50 percent over the typical refuse trucks.—Don Verhoff, Oshkosh Executive Vice President, Engineering Technology
Oshkosh Truck is the leading refuse collection body manufacturer in the world through McNeilus Companies Inc. and the Geesink Norba Group, both Oshkosh Truck Corporation companies. In addition to the refuse vehicle application, Oshkosh has developed an 8 x 8 heavy Expanded Mobility Tactical Truck (HEMTT-A3) that uses the ProPulse hybrid electric drives technology for military applications.
The ProPulse hybrid electric drive technology was developed for the refuse vehicle application as part of the Advanced Heavy Hybrid Propulsion System Project sponsored by the Department of Energy (DOE) and the National Renewable Energy Laboratory (NREL). Key partners in this four-year development effort were Rockwell Automation, The Ohio State University and John Miller Enterprises.
Heavy Hybrid-Refuse, Class 8, Oshkosh Truck Corporation Technical Specifications (21st Century Truck Partnership)