|Parallel HybriDrive system. Click to enlarge.|
BAE Systems launched its parallel hybrid propulsion system for heavy-duty truck applications at the National Truck Equipment Association Work Truck Show in Indianapolis. The parallel system, designed for Class 6, 7, and 8 vocational trucks, is the latest version of the company’s HybriDrive system.
The HybriDrive series propulsion system—currently in service on more than 3,000 transit buses in cities around the world—meets the demands of urban transit duty cycles, which require low average speeds and frequent stop-and-go operation. The HybriDrive parallel system is designed to address the needs of vehicles with duty cycles that require higher operating speeds and less frequent stops.
Our HybriDrive parallel system is the optimal hybrid electric solution for vehicles that operate in diverse duty cycles beyond standard urban operational modes.—Steve Trichka, vice president of power and energy management for BAE Systems
While the series system does not use a transmission, the HybriDrive parallel system is based on a single electric machine integrated between the engine and the transmission. The system can be installed with minimal impact to the vehicle, and enhances propulsion through an optimized blending of internal combustion engine power and electric power.
The HybriDrive parallel systems’ power and torque ratings range from 95 - 145 (71 - 108 kW) and 300 - 400 lb-ft (407 - 542 N·m). The system is designed to support large-bore heavy-duty power plants ranging from 350 hp to 600 hp (261 to 447 kW), with associated torque ratings of 750 to 2,150 lb-ft (1,017 to 2,915 N·m).
The HybriDrive parallel system, in final stages of development, will see it first road trials this spring and is expected to be deployed in markets around the world in 2012.
Buses equipped with BAE Systems’ HybriDrive series system have transported more than a billion passengers in cities across North America and in the United Kingdom including New York, San Francisco, Toronto, Ottawa, Houston, Seattle, London, and Oxford, U.K., and powers vehicles by the world’s leading bus manufacturers, including Daimler and New Flyer in the United States and Alexander Dennis and Irisbus Iveco in Europe.