The Titan XD Cummins diesel is the first commercial application of the new Cummins M2 two-stage turbo system, which helps reduce traditional turbo-lag through precision balancing between high-pressure and low-pressure turbos. The patented Rotary Turbine Control provides solid performance across the powerband and manages exhaust gas temperatures.
The new engine also features a Bosch® HPCR fuel system to deliver precise fuel control and multiple injections per combustion stroke, which helps increase efficiency and reduce traditional "diesel clatter." And, the advanced, maintenance-free Bosch® ceramic glow plugs provide quick engine starts, even in extreme low temperatures.
Another key advantage of the new Cummins diesel design is that it provides maximum durability and power in a lightweight package. Weight was reduced by building the cylinder block out of compacted graphite iron (CGI), which is stronger and lighter than traditional iron.
Other lightweight engine components were added, including high-strength aluminum-alloy heads and composite valve covers. The CGI block, along with the dual overhead camshafts, also contributes to the engine's excellent noise, vibration and harshness (NVH) characteristics. The new Cummins 5.0L V8 Turbo Diesel exhaust system has a particulate filter and selective catalytic reduction that enable the engine to run cleaner. That technology also serves a second purpose - reducing typical diesel noise.
As a result of all these advanced systems, the new Cummins 5.0L V8 Turbo Diesel is more capable than small displacement diesel engine offerings and less expensive than big bore heavy-duty diesels.
It is also designed to be fun to drive, with about 45 percent more torque at cruising speed than similar-sized gasoline V8 engines. And, its low revving powerband requires less downshifting and provides more confidence while towing, as well as saving fuel whether towing or carrying heavy loads.
"Since the majority of full-size pickup owners drive more than 10,000 miles a year, fuel economy is also critical. Titan XD's Cummins diesel is expected to provide a projected 20 percent better fuel economy than a gasoline-powered V8 while towing full loads," said Diaz. Actual mileage figures are not yet available.
Helping handle the power and torque of the engine is a heavy-duty 6-speed Aisin automatic transmission developed and tuned exclusively for the Titan XD.
Titan will also be offered with V8 and V6 gasoline engines. Details on those engines will be announced at a later date.
Durable off-road performance has also been emphasized, with features such as Hill Descent Control, Hill Start Assist and Brake Limited-Slip Differential (BLSD). A new off-road gauge uses accelerometer data to calculate the vehicle's pitch and roll angles.