Christopher Goodfellow - 23 March 2011
Cummins has announced it will use a combination of Selective Catalytic Reduction (SCR) and a Diesel Particulate Filter (DPF) to meet Tier 4 Final off-road emissions standards.
Jennifer Rumsey, Executive Director at Cummins Heavy-Duty Engineering, said: "The QSX15 and QSX11.9 not only meet the challenge of near-zero emissions, but they are able to achieve this with higher power output and lower fuel consumption."
At Tier 4 Interim emissions levels the QSX15 and QSX11.9 engines are capable of achieving up to 5% improved fuel efficiency compared to Tier 3. Fuel efficiency will be further increased for Tier 4 Final by an additional 3 to 4%.
Cummins' SCR system uses a a copper zeolite-based catalyst capable of up to 95% NOx conversion and able to operate more efficiently at lower temperatures. The system features advanced sensors to provide full closed-loop control. Diesel Exhaust Fluid (DEF) dosing levels are minimized with enhanced mixing in the decomposition pipe, according to a statement from the company.
The Cummins Particulate Filter (CPF) is retained from the Tier 4 Interim aftertreatment used by the QSX engines. The CPF incorporates both a diesel oxidation catalyst and the wall-flow filter, providing an additional margin of PM emissions control at the higher engine loads and power outputs of heavy-duty engines. The integration of SCR into the exhaust aftertreatment allows the CPF to reduce the frequency and duration of active regenerations below 1% of equipment operating time, creating a virtually full-time passive device.
The Environmental Protection Agency's Tier 4 Final emissions standards will apply to larger off road vehicles from 2014, reducing particulate matter emissions to 0.02 g/kW-hr and oxides of nitrogen (NOx) to 0.40 g/kW-hr.
Emissions analyst Integer Research has released a Focus Report: SCR and the Non-Road Mobile Machinery (NRMM) Market, which gives further details on the global off-highway sector and the impact of new emisions regulations.
Ben Treadwell - 30 July 2015
Hyundai Construction has launched its HX series hydraulic excavators in the U.S. and Canada featuring Tier 4 Final compliant engines from both Scania and Cummins. The smaller models are powered by the Cummins engines while the largest two feature the engines by Scania. The models range from 22 to 52 metric tons and achieve Tier 4 Final...
Ben Treadwell - 6 May 2015
US Company Hyster has made emissions reduction upgrades to their range of ReachStacker vehicles. The new upgrades feature Cummins QSL9 engines and will use a combination of EGR (Exhaust Gas Recirculation) and SCR (Selective Catalytic Reduction) to meet Stage IV and Tier 4 emissions legislation. Additional modifications include a high...
Ben Treadwell - 16 September 2014
Cummins Inc. has prepared for the upcoming implementation of U.S. Environmental Protection Agency (EPA) Tier 4 emissions regulations on January 1st, 2015, by ordering over 100 engine installations for passenger trains, diesel multiple units (DMUs), and switcher locomotives. In an interview with RailwayAge.com, Randy Nelson, Manager of...
Rebecca Hayward - 10 February 2014
Cummins has started production of 6-cylinder engines which meet the U.S. Environmental Protection Agency (EPA) Tier 4 Final emissions regulations. Output is expected to increase across the 190 bhp to 675 bhp engines in 2014, as off-highway manufacturers release machines ready to meet the new emissions standards which came into effect on 1...
Rebecca Hayward - 14 January 2014
Siemens Rail Systems and Cummins have announced a partnership to provide Selective Catalytic Reduction (SCR)-equipped passenger locomotives in the U.S. The locomotives will be powered by Cummins high speed QSK95 diesel engines, using SCR aftertreatment technology to meet the U.S. Environmental Protection Agency's (EPA) Tier 4 locomotive...
Ben Treadwell - 28 April 2016
Old World Industries, LLC announced today that it has completed the acquisition of Victory Blue, a Dallas based diesel exhaust fluid (DEF) company. The asset purchase included seven production facilities throughout the U.S. Kal Mahmood, President & CEO at Old World Industries stated that this acquisition would bring about improved...