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tt460

Joined Nov. 17, 2008

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  • 1 year ago
    tt460's comment on:

    Fort Worth testing ground for hybrid garbage trucks

    JR, No problem. You're right, hydraulic hybrids are better at reclaiming braking energy than are electric hybrids. Electric batteries waste alot of energy when being recharged, but hydraulics are very efficient at storing energy quickly. Both hydraulic and electric hybrids will find their place in the market. I believe Hydraulic Hybrids are going to be making a bigger mark on energy conservation in these big heavy vehicles like garbage trucks and delivery vehicles. UPS actually has a few videos on it and explain how their full hydraulic hybrid delivery vehicles work: http://pressroom.ups.com/landing/0,21...

  • 1 year ago
    tt460's comment on:

    Fort Worth testing ground for hybrid garbage trucks

    Actually, these vehicles are not electric hybrids at all. They utilize hybridization called "Hydraulic Launch Assist" which uses a totally different method of storing spent energy than the more common electric hybrids you see today. Rather than lugging around batteries, these vehicles store braking energy via pressurized fluid; or hydraulics. As the vehicle brakes: viscous fluid is forced into a pressurized holding tank where it is stored until it is needed (kind of like a battery, only it holds pressurized fluid rather than electricity). When the vehicle needs to accelerate: the pressurized fluid is released and forced through a hydraulic pump that converts the energy into forward motion. Less power is required from the engine so there are fuel economy gains as well as reduced emissions. So: fewer dead dinosaurs are used whether it's gasoline or diesel, and no coal power is used to charge any batteries.

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