The engine has been available for school bus applications since May 2016 from Thomas Built Buses. Now Cummins Westport Inc. (CWI) announced the ISB6.7 G, a 6.7 liter midrange, factory built natural gas engine is fully available as a production engine for shuttle bus, medium duty truck, and vocational applications in North America. This platform has large OEM availability for midrange trucks, vocational trucks and mid size buses and the expansion of applications potentially available more than doubles its addressable market.
The ISB6.7 G is based on the Cummins ISB6.7 diesel engine platform and operates exclusively on natural gas, including compressed, liquid, or renewable natural gas (RNG). The ISB6.7 G is the second engine from CWI to receive emission certification from the U.S. Environmental Protection Agency (EPA) and the Air Resources Board (ARB) in California for meeting the Optional Low NOx Emissions standards.
“We are pleased to announce the ISB6.7 G is now in full production and available for all of our customers and OEM partners,” said Rob Neitzke, President of CWI. “An engine of this size is a natural addition to CWI’s portfolio of natural gas engines. The ISB6.7 G offers the midrange customer an ability to take advantage of the most cost effective overall solution with the benefit of a low emission natural gas engine that has proven performance, reliability, and durability. In addition, operating on RNG offers customers a tremendous greenhouse gas savings opportunity versus fossil fuels.”
NOx emissions of the ISB6.7 G are 0.1 g/bhp-hr. – 50% lower than the current EPA and ARB NOx limit of 0.2 g/bhp-hr. CO2 emissions meet the 2017 EPA greenhouse gas emission requirements. Partial funding in support of the ISB6.7 G engine development has been received from the California Energy Commission through its Public Interest Energy Research (PIER) Program in conjunction with the Gas Technology Institute.
Source: Cummins Westport Inc.