|The basic I-SAM hybrid system. Click to enlarge.|
The Swedish Energy Agency has awarded SEK 9.8 million (US$1.4 million) to AB Volvo to support the application of hybrid technology in heavy vehicles—specifically, two refuse collection trucks in Gothenburg and Stockholm. The goal of the project is to achieve fuel savings of up to 30%.
The hybrid system used in the refuse truck is a version of the I-SAM (Integrated Starter, Alternator, Motor) parallel hybrid system also applied in the Granite construction trucks developed for the US Air Force. The I-SAM system comprises a starter motor, drive motor and alternator fit between the clutch and the I-Shift automatic transmission. (Earlier post.)
The parallel hybrid I-SAM system supports regenerative braking; electric launch and assist; electrification of power steering, air compressor and airconditioning; idle avoidance; and potentially downsizing in some applications, according to Emile Charest of the Hybrid Vehicle Development group at Volvo Powertrain. Charest made his remarks at this week’s Clean Heavy Duty Vehicles Conference.
The project will be implemented in co-operation with two of Volvo’s major refuse collection customers. The vehicles are scheduled to be placed in operation in the beginning of 2008. Evaluation and testing will be carried out in cooperation with the customers during a three-year period.
During the entire project, Volvo will further develop and optimize the technology for future series production. Volvo will also install and test a new safety system for vehicles in city traffic on both trucks.