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MIHPOW~Mild Hybrid Powertrain for a Delivery Truck
Published May 18, 2005 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The environmental impact of delivery trucks in urban areas is known to be great. These vehicles spend a majority of their duty-cycle in congested traffic with engines operating very inefficiently. The MIHPOW project aims at developing a mild hybrid powertrain for a delivery truck (7.5 t) by fitting the conventional powertrain with an axial flux motor/generator between the engine and the gearbox. Axial flux machines offer high torque and power density as well as an aspect ratio that allows the design of a very short machine. Therefore the hybridization requires minimal changes to the rest of the powertrain. The first prototype has been built and the integration into the vehicle is currently underway. This paper describes the system design of the hybrid powertrain as well as the application of axial flux technology for traction application.