Cummins Goes EGR-Free for Stage V

April 11, 2016

Cummins introduced a range of engines from 100 to 430 horsepower that it says will meet 2019 EU Stage V emissions standards without EGR and with its Single Module aftertreatment technology.

The new engines—F3.8, B4.5, B6.7, and L9—average 10 percent more power and almost 20 percent more torque than the company’s comparable Tier 4-Final powerplants.

“Removing Exhaust Gas Recirculation (EGR) allowed us to realize the full potential of the engine for Stage V without increasing displacement size,” said Jim Fier, VP-Engineering. “Our 12-liter engine already pointed the way forward for a successful EGR-free design at Stage IV, so we were able to cascade this simpler approach down through the power range. No EGR also means there is less to cool, which will help lower the cost of OEM integration.”

Overall fluid cost compared to Tier 4-F will be reduced on average of 3 percent, the company said, due to improvements in fuel efficiency and depending on application, compared to those of Stage IV. The engine operating costs will be further reduced with an achievable 1,000-hour oil change interval, twice as long as the current 500 hours.

Smarter electronics will bring Start-Stop technology imbedded in the engine management system, offering the potential to realize fuel savings of between 5 percent and 15 percent, corresponding to the amount of equipment idle time. Cummins Stage V engines are enabled for wireless connectivity, ready to deliver instant, expert engine diagnostics over the air so operators can maximize the uptime availability of their equipment.

The 4-cylinder F3.8 is a 3.8 liter engine, and moves from 130 horsepower at Stage IV to 155 horsepower. The 4.5-liter B4.5 moves from 173 to 200 horsepower. The 6.7-liter B6.7 moves to 326 horsepower, and the L9 moves from 400 to 430 horsepower.

The Cummins Single Module for Stage V combines DPF, SCR and urea-dosing technologies in one module, providing an up to 50 percent reduction in envelope size and a 30 percent reduction in weight compared with those of Stage IV exhaust aftertreatment.

The Single Module is essentially a fit-and-forget system, capable of removing emissions almost entirely by passive regeneration, with no impact on equipment operation and requiring no operator intervention. The service cleaning interval is expected to extend significantly beyond the 5,000 hours of today's systems. The modular design of the Single Module allows for varying diameters and lengths, to efficiently match catalyst capacity to the power output of the engine.

Source: Cummins