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Hydraulic Hybrid. Also on display at the meeting will be a Peterbilt Model 320 featuring Hydraulic Launch Assist hybrid technology. (Earlier post.) The Class 8 vehicle is specifically designed for refuse applications and uses its kinetic energy to conserve fuel and assist in acceleration.
The Hydraulic Launch Assist technology was also developed in partnership with Eaton. The system is particularly beneficial in heavy stop-and-go applications, such as refuse collection. In addition to the enhanced fuel economy, brake wear can be reduced by more than 50 percent, improving serviceability requirements and reducing operating expenses.
Hydraulic Launch Assist works by recovering a portion of the energy normally lost as heat by the vehicle’s brakes in the form of pressurized hydraulic fluid. This fluid is stored in an on-board accumulator until the driver next accelerates the vehicle.
Stored energy launches the vehicle during the initial, high-fuel consumption start from stop, followed seamlessly by power from the primary engine. In performance mode, the stored energy is released and blended with engine power at launch. This can significantly improve acceleration due to the high power density of hydraulics.
November 10, 2006 in Hybrids | Permalink | Comments (9) | TrackBack