Stage V, Present a new standard for clean diesel
In March, 2017, Cummins unveiled its next generation of super clean construction, mining and agricultural engines in the US market at Conexpo in Las Vegas, USA. Designed to comply with the Stage V emissions regulations that will be introduced in the European Union (EU) in 2019, the engines will not only appeal to all OEMs with improved performance, lower operating costs, lighter weight and easier installation compared to the Tier 4 final, but also provide an easier export opportunity to EU and various emission regulation countries.
Stage V, based on the number of exhaust gas micro-materials
Stage V refers to the EU legislation for air pollution prevention that eliminates particulate matter (PM) emissions from diesel engines. It is the change of the certification criteria for emissions, from the limit for the mass of particulate matter to the number of micro-materials. The actual emissions are reduced by 99% while the nitrogen oxide (NOx) limit remains the same at 0.4 g / kW / hr. In order to satisfy this criterion, a post-treatment system for filtering diesel particulate matter is essential. Stage V will be applied to European 174-751 hp (130-560kW) diesel engines from 2019, and Tier 4 Final 2019 certification is essential to provide product benefits to North American manufacturers.
Cummins Stage V without EGR
The 2019 Cummins F3.8, B4.5, B6.7 and L9 engines, which incorporate leading combustion and intake and exhaust control technologies from Cummins' new post-processing single module (Single Module), do not require EGR (Exhaust Gas Recirculation). As the EGR is excluded, the amount of cooling water heat rejection is reduced by up to 20%, which reduces the cooling system package size. These engines provide 100 to 430 hp (75 to 321 kW), lower installation costs and simplify installation. The Cummins single-module system combines Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) and urea dosing technologies into a single unit that delivers up to 50% less size and weighs 30% less. Passive generation eliminates virtually all of the substances contained in the exhaust gas, without requiring operator intervention and without negatively affecting equipment operation.
Less engine size, More performance
The four-cylinder F3.8 and B4.5 engines offer significant opportunities for OEMs to reduce engine size and reduce costs while maintaining the productivity of existing equipment by significantly increasing output and torque. The 3.8-liter engine has been upgraded from 130 hp to 155 hp and 4.5-liter from 173 hp to 200 hp. The peak torque of F3.8 increases by more than 20 percent to 440 lb-ft and the B4.5 engine increases by 11 percent to 575 lb-ft.
The best-in-class six-cylinder 6.7-liter and 9-liter engines boast higher power output and torque. The next-generation B6.7 has a maximum rated output of 326 hp and a maximum torque of 1015 lb-ft, 30 percent stronger than its predecessor. The L9's peak rated output increases from 400 hp to 430 hp, with a peak torque of 1360 lb-ft, a 13 percent increase.
More efficiency as well as economy
"The new generation of Tier 4 Final / Stage V engines will deliver significant performance improvements with greater power in smaller, lighter packages," said Hugh Forden, Executive Director of Cummins Off-Highway Engine Division. Improvements in efficiency can reduce total fuel and DEF (Diesel Exhaust Fluid) costs by up to 3 percent compared to current Tier 4 Final models, depending on engine and application. The oil change cycle also doubles from the current 500 hours to 1000 hours.
Cummins' Stage V engines are highly resistant to sulfur in fuel up to 5,000 ppm for OEMs exporting equipment to a variety of countries. This means that Cummins Stage V engines can be sold through post-processor changes in countries where Tier 4 Final, Stage V and lower emissions regulations apply.