Cummins 6.7L Turbo Diesel Wins 2008 Automotive News PACE Award (.pdf document, opens in new window)

The Dodge Ram Heavy Duty pickup with the 6.7L Cummins Turbo Diesel engine offers outstanding horsepower, and torque, while enabling 2010 emissions compliance in 2007, a full three years ahead of the requirements.  This has allowed its already proven combination of advanced technologies to have been tested and now enhanced for 2010. The 6.7L Cummins Turbo Diesel engine replaced its 5.9L predecessor and provides superior trailer towing, acceleration, throttle response and driveability. It builds on the long tradition of durability of the Cummins Turbo Diesel.

Other feature enhancements are improved combustion, integrated braking, and improved integration of engine and vehicle systems for optimal fuel economy.

Now in a Dodge Ram Heavy Duty truck, an integrated exhaust brake is available direct from the factory. Utilizing the 6.7L Cummins Turbo Diesel engine's turbocharger, the exhaust brake significantly improves control when towing heavy applications, such as pulling RV fifth wheels and horse trailers, providing added vehicle control and vehicle brake savings by transforming horsepower into braking power. This extends the vehicle brake life, resulting in reduced total cost of ownership. Testing has also shown more than a 30 percent improvement in engine retarding torque at 2000 rpm compared with aftermarket exhaust brakes. In addition, the vehicle features "Smart" tow/haul controls that provide customers with flexibility and increased safety when towing heavy loads.

This engine is rated with 350 horsepower at just 3013 rpm. The 6.7L Turbo Diesel achieves a peak torque of 650 lb-ft at 1500 rpm for the automatic transmission configuration and maintains that peak torque all the way to 2800 rpm (a "best in class" capability for a heavy-duty diesel pickup) and a full 610 lb-ft peak torque for the manual transmission.

Nearly 40 percent of the 6.7L Cummins Turbo Diesel engine parts are carryover from the 5.9L, with modifications geared to surpass emissions standards and increase horsepower and torque, while maintaining the durability associated with Dodge and Cummins. The in-line six-cylinder product has fewer components than V8 engines. Fewer parts translates into fewer opportunities for things to go wrong. And it's been thoroughly tested through every stage of development for over eight million customer equivalent miles to ensure dependability and durability in every kind of work environment.

This engine utilizes a third-generation High Pressure Common Rail (HPCR) fuel system and has pressure capability of up to 1800 bar (26,000 psi). It is a highly flexible system that achieves a total package of lower Noise, Vibration, Harshness (NVH), reduced emissions and improved fuel economy. This engine uses cooled exhaust gas recirculation (EGR) and other air-handling concepts, including Cummins own proprietary sliding-nozzle Variable Geometry Turbocharger to give optimum boost level as a function of engine rpm and load. The multi-injection-capable fuel system is then used to manage in-cylinder conditions to limit emissions. The product also has a particulate filter that reduces particulate matter (PM) level by 90 percent of pre-2007 levels.

Leapfrogging the competition, the 6.7L Turbo Diesel engine met the more stringent 2010 EPA NOx standard a full three years ahead of the requirements. Cummins is the first diesel engine manufacturer to have a product certified to the 2010 EPA heavy-duty engine standards for oxides of nitrogen (NOx) and particulate matter (PM) emissions, making it the cleanest heavy-duty diesel engine available in North America.

Cummins fully supports the development of renewable energy sources. This engine's fuel system has the ability to run with B5 Biodiesel as standard. The engine has also been designed to operate on Ultra-Low Sulfur Diesel Fuel (15-ppm sulfur).

As an added bonus, this engine is 3dBa quieter (~1/2 the engine noise than the 5.9L Turbo Diesel at all points on the engine speed operating range). The 6.7L engine incorporates several features that contribute to a 50 percent quieter engine and significant reduction in cabin sound levels, increasing the vehicle's overall refinement. This provides owners with the quietest engine in the heavy-duty diesel pickup truck market.

Maintenance is kept to an absolute minimum, with easy access to all service points.

Of course, both the Dodge Ram truck and Cummins engine are fully covered under a comprehensive warranty that shows how much confidence we have in its reliability and durability.