BAE Systems and Caterpillar Inc. have signed a joint development agreement to collaborate on a parallel hybrid propulsion system for heavy-duty trucks. Under the agreement, BAE Systems will integrate Caterpillar CX Series Transmissions into its HybriDrive parallel propulsion system, recently launched at the National Truck Equipment Association Work Truck Show. (Earlier post.)
Through this alliance, our transmission will become an integral part of BAE Systems’ new HybriDrive parallel system. Our driveline expertise, including planetary automatic transmission expertise, combined with BAE Systems’ proven hybrid technology, will result in a seamlessly integrated product that meets performance and efficiency demands of vehicles that operate in diverse duty cycles
—Jeff Pohl, Hauling & OEM Drivetrains Product Manager for Caterpillar
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| BAE Systems HybriDrive Parallel System for Heavy Duty Trucks. Click to enlarge. |
HybriDrive series and parallel systems both use simplified and proven components and controls to deliver their capabilities. 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 system’s energy management and control capabilities ensure all energy flow—such as propulsion and recuperation—occurs in the most efficient fashion, resulting in lower fuel consumption and reduced emissions.
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.