Nissan has detailed a sequential turbocharger system that will be used in the next-generation Titan diesel.
Built by Cummins, the technology takes advantage of two turbocharger sizes to optimize boost at both low and high rpm. The smaller, lighter unit quickly spools up when the engine is near idle, while the larger turbocharger takes over for higher pressure when the engine is under higher loads.
Built by Cummins, the technology takes advantage of two turbocharger sizes to optimize boost at both low and high rpm. The smaller, lighter unit quickly spools up when the engine is near idle, while the larger turbocharger takes over for higher pressure when the engine is under higher loads.
An electronic rotary valve provides the control for the system, managing which turbocharger receives more exhaust flow. It can also serve as a wastegate or raise the back pressure, working as an exhaust brake and increasing exhaust temperature to help clean the diesel particle filter.
The setup is expected to squeeze up to 300 horsepower and 500 lb-ft of torque from the 5.0-liter V8 engine, according to Car & Driver.
The next-generation pickup is due to be unveiled in January at the Detroit auto show.
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