Birmingham, UK (November 6, 2012) -

Cummins Engine announce today that it will develop a natural gas version of the class leading ISB engine.  It will be capable of achieving Euro 6 and EPA 2013 emissions, with production expected to be in 2015.

Neil Pattison, Director - Automotive Engine Business for Europe, Middle East and Africa, said: “Bus operators have recognised the impressive low-end torque, transient response and quiet operation of Cummins’ natural gas engines.   The ISB gas engine is a welcome addition to the range, offering an alternative fuel solution which is suitable for a number of European installations.” 

The ISB G engine will use proven spark-ignition technology with a combination of cooled Exhaust Gas Re-circulation (EGR) and stoichiometric combustion.  Cummins cooled EGR systems are proven to lower combustion temperatures and reduce engine emissions and noise and are fully proven with over one million engines already in service. (Stoichiometric combustion is where fuel is burned completely, ensuring an oxygen free exhaust.)  

The nature of the design means that a simple three-way catalyst exhaust system is used.  This maintenance-free technology is an effective, simple, passive device, packaged as part of the exhaust muffler, providing consistent emissions control across the operating range without the need for a Diesel Particulate Filter (DPF) or a Selective Catalytic Reduction (SCR) system.  

The engine block and other key components are shared with the diesel, meaning it offers alternative fuel capability with the inherent durability of the ISB diesel engine

“Low carbon power solutions such as natural gas are growing in popularity. Their ability to run on compressed and liquefied natural gas or bio-methane is increasing their attractiveness with environmentally conscious operators and local authorities,” added Pattison.

Already announced for Euro 6, the ISL G natural gas engine is on the Cummins stand (G90) at Euro Bus Expo.  The 8.9 litre engine is available from 250 to 320 ps for alternative fuel bus applications, with a peak torque of 1350 Nm.  

For Euro 6, the ISL G engine adds a closed crankcase ventilation (CCV) system and upgraded electronic controls.   The new remote mounted CCV system recycles crankcase blowby gases to minimize exhaust emissions and optimize the greenhouse gas benefits of natural gas engines.   An updated electronic control module is required to manage the On-Board Diagnostics (OBD) requirements for Euro 6.

“The ultra-clean design of the ISL G means that the operating benefits at Euro 5 are carried through to Euro 6 with minimal impact on the installation,” concluded Pattison.

About Cummins
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  More Euro 6 information can be found on  Follow us @cumminseuro6.