Darlington, UK (March 29, 2012) -
Cummins’ next generation of the ISB6.7 engine for the planned Euro VI emissions was revealed today at the company’s European Technical Centre. The 6.7 litre engine range extends up to 310 ps for truck and coach installations, and 280 ps for bus applications. Peak torque remains at a high level of 1100 Nm.
Neil Pattison, Director - Automotive Engine Business for Europe, Middle East and Africa, said: “Versus Euro V, Euro VI sees oxides of nitrogen reduced by a further 77% with particulate levels reduced by a further 50%. The change in particulate measurement in the legislation from weight to unit count means that the real world numbers will realise a drop closer to 99%. This is a significant challenge for all manufacturers to meet.”
The latest version of Cummins 6 cylinder B Series builds on the pedigree of the B5.9 and ISBe 6.7 engines which have developed a reputation for performance, fuel efficiency and durability over more than 20 years.
Added to this is the EPA 2010 engine technology of cooled exhaust gas recirculation (EGR) with variable geometry turbocharging (VGT) which has been adapted for European emissions. The EGR System is re-designed for better integration with cab-over applications and the Cummins VGT is optimised for high torque and low speed capability, delivering significant performance and driveability improvements. The VGT can also function as an exhaust brake, allowing the OEM to remove cost from their system. These are controlled by a new electronic control module (ECM) with increased capability for controlling engine and aftertreatment with more challenging on-board diagnostics (OBD) monitoring requirements.
“To date we have over 330,000 EPA 2010 engines operating in the US. By the time Euro VI comes in we will have over 3 years experience of using all of the key technologies. We can use the combustion and after treatment architecture and tailor it for European market operations and duty cycles,” added Pattison.
Due to the test cycles focusing on lower speeds and lower loads than EPA 2010, Euro VI makes it more challenging for the aftertreatment to meet the required emissions levels. So, the ISB6.7 uses a new aftertreatment system which has been specifically designed and developed in Europe by Cummins Emission Solutions for Euro VI. It comes in a switch back configuration for compact installations and is packaged ready for OEMs to fit direct to their chassis. Controlled by the engine ECM, it incorporates a Cummins Particulate Filter (CPF) with Selective Catalytic Reduction (SCR) to meet the ultra-low levels required at Euro VI.
A patented SCR design uses Copper Zeolite technology for very high conversion efficiency, even at low temperatures. The CPF system will manage re-generation events without the need for driver intervention, who we expect not to notice its operation. The airless Adblue dosing nozzle is integrated in the system for improved reliability and durability.
A further emissions improvement is the new closed crankcase ventilation (CCV) system mounted to the engine valve cover. It is needed to re-cycle blow-by gases now counted in the engine emissions and has been repositioned for cab over designs.
In addition a revolutionary new nanotechnology based filter media has been introduced offering unmatched protection for the engine’s fuel system, removing up to 98.7% of all particles as small as 4 microns. The filter's replaceable service element has less environmental impact than its predecessor, and unique patented no-filter, no-run design prevents the engine from running without a media element installed, eliminating the risk of debris entering the engine.
“Meeting Euro VI in the most cost effective manner for the operator will require the highest level of low emission engine technology to date. Our engineers will work closely with OEM customers to manage the added complexity and give them confidence to install Euro 6 in line with the legislation dates,” concluded Pattison.
Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, electronic controls, air handling, filtration, emission solutions and electrical power generation systems.
Headquartered in Columbus, Indiana, (USA) Cummins employs approximately 44,000 people worldwide and serves customers in approximately 190 countries and territories through a network of more than 600 company-owned and independent distributor locations and approximately 6,500 dealer locations. Cummins earned $1.85 billion on sales of $18 billion in 2011. Press releases can be found on the Web at www.cumminsengines.com. More Euro VI information can be found on www.cumminseuro6.com. Follow us @cumminseuro6.