The Cummins EU Stage IV package, from 37-503 kW (49-675 hp), has a fully integrated air intake to exhaust aftertreatment system, which the firm says is designed to minimise space and optimise performance for every installation. Cummins designs and manufactures all the key enabling technologies for EU Stage IV such as filtration, aftertreatment systems, fuel systems, electronics and turbochargers.
The company said that they offer the QSB6.7 and QSL9 engines ready to meet EU Stage IV standards with a next generation designed aftertreatment system. The manufacturer said that not only are the engines ultra-clean, they provide all the power needed for demanding work, when responsiveness and uptime is essential. The QSB6.7 engine ranges from 109-231 kW (146- 310 hp), and the QSL9 engine is rated from 172-298 kW (230-400 hp) for EU Stage IV. The QSB6.7.
Cummins said that the QSB6.7 and QSL9 make no performance compromises in order to meet near-zero emissions levels, retaining the faster engine response and reliability proven by the EU Stage IIIB / EPA Tier 4 Interim engine. The Cummins Particulate Filter (CPF) featured on the EU Stage IIIB model has been replaced by a much simpler Cummins Compact Catalyst (CCC) which is wholly maintenance free. With the addition of Selective Catalytic Reduction (SCR) working in conjunction with the cooled Exhaust Gas Circulation (EGR) on the engine, there is better control over exhaust emissions than in previous models. The Cummins designed aftertreatment provides a flowthrough operation enabling fuel efficiency compared with the current EU Stage IIIB engine.
Completing the EU Stage IV line up, Cummins has also launched the all new QSM12 in April this year with up to 382 kW (512 hp) output for heavy-duty applications. The 6 cylinder, 12 litre engine is purposedesigned to meet EU Stage IV regulations with a more compact envelope, which the manufacturer says has over 30 percent higher power density than engines with a similar power range. The QSM12 meets the ultra-low emissions standard without the use of cooled EGR, combining a CPF with SCR to achieve its ultra-clean exhaust.
The manufacturer said that the new QSM12 brings a major advantage for EU Stage IV equipment installations by restoring the envelope size of its QSM11 predecessor, used for EU Stage IIIA / EPA Tier 3 applications. High efficiency air handling and advanced combustion enable the QSM12 to return to the simplicity of a wastegate turbocharger and achieve near-zero emissions without the need for a cooled EGR system. Cummins argue that as a result, internal loads on the QSM12 are reduced to free up extra power potential and heat rejection is lowered by over 40 percent compared with engines using cooled EGR.
The QSM12 provides a smaller, lighter and simpler engine package to install. It gives equipment manufacturers an ideal opportunity to downsize to a far more productive and economic 12 litre engine from the same company.
