2.8L Cummins Turbodiesel

2.8L Cummins I-4 DIesel Specs & Information

Cummins closely worked with the Department of Energy (DOE) and Nissan Motors in the development of a high efficiency 2.8L diesel engine. The project, codenamed "ATLAS", began in 2010, and was scheduled to near completion in 2014. The test mule for the 2.8L, inline 4 cylinder was Nissan's Titan pickup, though Nissan and Cummins have since brought a larger 5.0L V-8 to the Titan XD platform. However, Nissan has been toying with the concept of using the 2.8L platform in its mid-size Frontier pickup model. Efficiency, emissions, and power density were priority objectives of the project. In testing, the engine was able to deliver more than 26 mpg while powering a full-size Nissan Titan pickup. In the lightweight Nissan Frontier, there's no excuses why the combination wouldn't push into 30 mpg territory as GM's midsize pickups have done with their own 2.8L Duramax (no relation to the Cummins).

The light pickup version of the 2.8L Cummins is based on previous engine designs - the European ISF2.8 and the agricultural/industrial QSF2.8. Obviously, a key difference in this variation is the emissions equipment, as it was necessary to meet strict regulations at the Federal level for on-highway diesels in the U.S. The engine features a unique diesel oxidation catalyst (DOC), selective catalytic reduction system (SCR), and diesel particular filter (DPF); all three systems are combined and mounted to the engine, rather than further down in the exhaust stream. The engine also featured a water-to-air intercooler (charge-air-cooler).

2.8L Cummins Specs

Configuration:

Inline 4 cylinder

Displacement:

2.8 liters, 171 cubic inches

Cylinder Head Material:

Cast iron

Engine Block Material:

Cast iron

Injection:

Direct Injection, high pressure common rail, Piezo injectors

Aspiration:

Turbocharged, water-to-air intercooler/charge air cooler

Valvetrain:

OHV

Weight:

Approx. 475 lbs, not including emissions equipment

Horsepower:

210 hp @ 3,600 rpm

Torque:

385 lb-ft @ 1,800 rpm

Emissions:

Integral engine mounted DOC, SCR, DPF

Engine Dimensions:

Length:

24.9"

Width:

25.9"

Height:

28.5"

During testing, the engine had been mated to a ZF built 8 speed automatic transmission. The small displacement 4 cylinder turbodiesel mustered up an impressive 385 lb-ft of torque at a modest 1,800 rpm. Though torque curves have not been made public, we assume it displayed a relatively flat and broad curve. Nissan has been hesitant to comment on its participation in the ATLAS ( Advanced Technology Light Automotive Systems) project, but did use the 2.8L Cummins in their Frontier "Diesel Runner" concept, which was unveiled at the 2014 Chicago Auto Show.