High-Pressure Hybrids: Fuel-Efficient Hydraulic Vehicles Come of Age: Scientific American
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Thanks to hybrid hydraulics, there is something especially awesome in the power of the next generation of garbage and delivery trucks that will soon be rolling through your neighborhood. Although they may still look like big, bulky trucks, inside they boast hydraulic power-train systems that are significantly more energy and fuel efficient than similar conventional or gasoline-electric hybrid vehicles. If hybrid hydraulics prove their mettle for more industrial uses, cars may not be far behind.
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Could this be the system that ends our dependence on oil? With the smaller diesel engines, they could all be designed to run on biodiesel.