REDFORD, MI – Detroit Diesel has unveiled its new DD13 engine. A smaller version of the DD15 engine, the DD13 displaces 12.8 liters, and features a six-cylinder, in-line configuration. Designed for the less-than-truckload, regional distribution, and vocational markets, the DD13 will be offered in output and torque variants from 350 to 450 hp and 1,350 to 1,650 lb.-ft.

The DD13 is the second in a series of all-new heavy-duty engines from Detroit Diesel that will eventually cover three displacement categories: 13 liters, 15 liters, and 16 liters. Part of the Detroit Diesel engine family, the DD13 shares a common base engine design that will be leveraged on a global scale by Daimler Trucks.

Featuring many of the same technologies found in the DD15, but weighing 400 lbs less, the DD13 provides best-in-class fuel economy — up to five percent better when compared to the MBE 4000 (which it will be replacing).

Built to spend more time in top gear, the DD13 pulls strong down to 1,100 RPM, which results in increased fuel economy. The DD13’s enhanced cooling system reduces fan on-time — further contributing to the engine’s fuel efficient design.

Another key feature is the engine’s electronically-controlled Amplified Common Rail Fuel System (ACRS) — a fuel delivery system that works in unison with Detroit Diesel’s DDEC VI engine management system to deliver the exact amount of fuel needed at the right moment, creating an optimal combustion event. Not only does this result in a more fuel-efficient engine, it cuts NOx emissions without draining power.

The DD13 was designed with convenience in mind as the cartridge-style filters (oil, coolant, and fuel) are positioned above the frame rail. And the maintenance-free crankcase breather further contributes to the low cost of ownership.

Other key engine features contributing to the all-around performance of the DD13 include the Jacobs engine brake, which is integrated into the engine and offers up to 546 braking horsepower; a rear gear train; and a ribbed cast iron block that lowers noise vibration harshness. The DD13’s advanced design also allows for seamless integration of BlueTec SCR technology.

The market launch of the DD13 will start with Sterling Trucks and Freightliner in 2009, followed by Western Star in 2010. It will be manufactured at the Detroit Diesel plant in Redford, Mich.