Allows sales of model year 2015 Allison H 40/50 EP™ hybrid propulsion system paired with the Cummins ISB6.7 and ISL9 diesel-electric hybrid engines for transit buses and coaches.
The plant is also in full production with the new high-performance Cummins Westport ISX12 G heavy-duty natural gas engine.
The main reason for the swap is financial, as warranties expire on the hybrid engines, the city will have to take on the added cost of maintaining hybrid systems.
The Cummins ISL9 and ISX12 clean-diesel engines meet the 2013 U.S. EPA regulations as well as the 2014 U.S. Department of Transportation greenhouse gas and fuel-efficiency standards, achieving fuel-economy improvements for motorcoach customers.
The engine, which is equipped with high-efficiency water, fuel and lube pump systems, meets both the EPA 2013 regulations — which require near-zero emissions of NOx — and the new greenhouse gas and fuel-efficiency rules that will take effect in 2014.
The 11 locomotives, originally built by MotivePower about five years ago, will be equipped with new engines and propulsion systems that meet significantly higher environmental standards.
To meet strict emissions standards, MaxxForce engines use Navistar's advanced in-cylinder NOx-reduction technology, which provides bus fleets with significant no hassle operational advantages over liquid-urea SCR emissions aftertreatment systems used by other diesel engine OEMs.
Company collaborated with other engine and vehicle manufacturers, technology suppliers, fleets and environmental organizations to provide input.
ISX11.9 and ISL9 engines provide a power range that is well suited for motorcoach applications and are certified to meet EPA and California Air Resources Board 2010 emissions regulations, while delivering better performance and better reliability.
The company also has re-engineered its cooling packages for all 2011 model year coaches to accommodate the 2010 engines.
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