|EcoFit Single Module. Click to enlarge.|
Cummins Emission Solutions, a subsidiary of Cummins Inc., will introduce the first of its next generation of ultra-high efficiency aftertreatment systems, the EcoFit Single Module, at the Mid America Trucking Show in Louisville, Kentucky on 26 March.
The EcoFit Single Module is designed to be up to 60% smaller and 40% lighter compared to the EPA 2013 solution it supersedes, all while improving emissions reduction performance. The smaller size enables better heat management and retention for improved fuel economy capability, while the simple single-pass exhaust flow design delivers low back pressure, meeting the needs of end-user customers.
Currently, Cummins Emission Solutions offers two separate EcoFit on-highway systems:
EcoFit Diesel Particulate Filter Systems. Since 2004, more than 1 million EcoFit DPFs have been put into use. EcoFit DPF Systems are effective at removing more than 90% of Particulate Matter (PM). Most on-highway configurations use a combination EcoFit Diesel Oxidation Catalysts (DOC) and DPF system, using passive and active regeneration to allow more control in oxidizing and cleaning the filter.
EcoFit DPF systems use wall-flow substrates typically made of porous ceramic media that capture exhaust gas and remove PM or soot particles. A typical filter consists of an array of small channels for exhaust gas to flow. Adjacent channels are plugged at opposite ends, forcing the exhaust gas to flow through the porous wall, capturing the soot particles on the surface and inside pores of the media. As soot accumulates in the filter, a regeneration event will provide sufficient heat to oxidize and capture the soot. The remaining ash can be removed during regularly scheduled cleaning events based on the recommendations of the engine manufacturer.
EcoFit Selective Catalytic Reduction Systems. Since 2005, nearly 1 million EcoFit Selective Catalytic Reduction Systems and complementary components have put in service worldwide. EcoFit SCR Systems reduce NOx emissions for a broad range of on-highway applications and enables enhanced fuel economy. The systems require little to no maintenance with occasional dosing system filter maintenance depending on the application.
The EcoFit SCR Systems are comprised of three main elements: SCR catalyst, Urea Dosing System and the Aftertreatment Control System.
The simpler packaging of the EcoFit Single Module allows for fewer variations, offering OEM customers system integration benefits, while providing end-user customers with a more robust and reliable aftertreatment system. This new solution, which will meet GHG and fuel efficiency standards for EPA 2017, specifically addresses the needs of medium- and heavy-duty engine customers in low emissions markets.
This product uses innovations in catalyst and urea dosing technologies unique to Cummins Emissions Solutions to deliver an ideal solution in the market. Historically, aftertreatment systems have been designed to meet emissions requirements; however, we’ve approached the development of this system to meet our customer needs first, while also meeting emissions standards and maintaining product integrity. We designed a product that will not only meet, but also exceed customer expectations.—John Carroll, General Manager - Global On-Highway Business
Advancements in catalyst technologies have allowed the diesel particulate filter to have a bigger ash capacity, permitting for increased time between maintenance events and minimal operator intervention. Improvements in NOx reduction capabilities in the selective catalytic reduction system have been enabled by the use of the EcoFit UL2 Liquid-Only Urea Dosing System.
OEM customers will benefit from simpler chassis integration, as the UL2 system does not require engine coolant lines to and from the diesel exhaust fluid (DEF) injector.
Operators will see more efficient atomization of urea and minimized urea deposits, thus requiring fewer regeneration events while experiencing the optimal use of DEF throughout the system.
Cummins Emission Solutions develops and produces various emission solutions including custom engineering systems and integrated controls; oxidation catalysts; particulate filters; NOx reduction systems such as selective catalytic reduction and NOx adsorbers, and engineered components.
With key operations in the US, China, India, United Kingdom, Germany, Brazil and South Africa, Cummins Emission Solutions serves both OEM and engine first fit and retrofit customers.