Hydraulic hybrids boost fuel economy: Innovative propulsion system enhances efficiency, cuts emissions

摘要

High fuel prices have most every driver feeling pain at the pump. But imagine you're UPS with a fleet of 91,000 delivery trucks. "Fuel conservation is critical to our business," says company Vice President Frank Whalley and, as a result, the company is actively investigating alternative vehicle-propulsion systems such as hydrogen fuel cells, liquified natural gas, propane, and electric power.