NEW YORK – Mack Trucks Inc. and Kenworth Truck Co. both deliver prototype diesel-electric hybrid trucks to the New York Department of Sanitation.

Mack Trucks says its TerraPro refuse truck is the first production-intent diesel-electric hybrid truck to meet the Environment Protection Agency’s 2010 emissions standards for Class 8 heavy-duty applications, which call for an 80% reduction in oxides of nitrogen emissions.

The Department of Sanitation will evaluate the vehicle that is powered by a 325-hp Mack MP7 engine with selective catalytic reduction exhaust (SCR) aftertreatment technology.

The SCR system sprays a solution of 67.5% purified water and 32.5% urea into the exhaust. The powertrain has an integrated starter, alternator and electric motor. It also has a lithium-ion battery pack that stores energy produced by braking.

Mack claims the hybrid truck improves fuel economy by 30% “with a corresponding greenhouse-gas emissions benefit.”

The truck was built at the Mack Macungie Assembly Operations plant near Allentown, PA.

Kenworth’s T370 truck is equipped with a stakebed body, PACCAR Inc.’s PX-6 engine rated at 240 hp and an Eaton Corp. diesel-electric hybrid power system

The Kenworth hybrid’s assignment is to pick up and deliver supplies and parts for the Department of Sanitation’s various locations throughout the New York City metropolitan area. The department expects to introduce three more Kenworth T370 hybrids into service later this year.