Will Use the New ISB6.7 G from CWI in Saf-T-Liner C2,
Firm’s Propane-Fueled Minotour Type A Is in Production
Daimler’s Thomas Built Buses is affirming its commitment to alternative fuels, pledging to use the just-announced ISB6.7 G mid-range engine from Cummins Westport in a new Type C school bus, and noting that its smaller, propane-fueled Minotour is in production.
“At Thomas Built, we want to produce a full line of buses that exceed current environmental standards,” president and CEO Kelley Platt said in release.
“As the demand grows for sustainable transportation solutions, Thomas Built Buses is at the forefront of offering a robust line of alternative-powered vehicles including compressed natural gas, diesel-electric hybrid and propane technology,” she said.
The new Minotour (F&F, March 28, 2011) is a Type A school bus, seating up to 30 passengers. The propane option is available on the 159″ dual rear wheel (DRW) model with a GVWR of 14,200 pounds. The vehicle has a 6.0-liter General Motors engine with fully-integrated liquid propane system by CleanFuel USA. A three-tank configuration holding the equivalent of 35 gasoline gallons yields an estimated single-fill range of 315 miles.
Thomas Built CNG Since 1992, 1,300 Sold
The propane-fueled Minotour is California Air Research Board-certified and exceeds EPA 2010 emissions requirements, Thomas Built says. The first two propane-fueled Minotour buses have been delivered to Student Transportation of America, and have been deployed in Chaska, Minn.
A propane-fueled variant of the Type C Saf-T-Liner C2 bus is expected to be available as early as February 2013.
Thomas Built notes that the 6.7-liter Cummins Westport ISB6.7 G for its new CNG-fueled Type C Saf-T-Liner C2 has been promised for 2015 (F&F, October 4). The busbuilder further notes that the new engine will be based on the ISB6.7 diesel by Cummins, Inc. and will use Cummins Westport’s spark-ignited, stoichiometric-cooled exhaust gas recirculation (SEGR) technology.
Thomas Built launched its Type D rear-engine Saf-T-Liner HDX school bus with CNG in 1992, and since then has placed more than 1,300 in service.
The manufacturer says it’s “expanding its CNG offering in response to increasing customer interest in school buses powered by lower-priced, cleaner and increasingly abundant natural gas.”
Thomas Built’s green vehicle lineup also includes the Saf-T-LinerC2e diesel-electric hybrid.
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Source: Daimler-Thomas Built with Fleets & Fuels follow-up