Cummins 2013 Motorcoach Diesels
Cummins Inc. has unveiled its 2013 engine lineup for the motorcoach market. The Cummins ISL9 and ISX12 diesel engines meet the 2013 U.S. Environmental Protection Agency (EPA) exhaust emissions regulations as well as the 2014 U.S. Dept. of Transportation (DOT) greenhouse gas (GHG) and fuel-efficiency standards, the company said.
Both engines will offer up to 2% better fuel economy compared with the 2012 model-year engines while also delivering improved reliability, Cummins said, citing a more efficient fuel pump and water pump on the ISX12, as well as enhancements to the VGT turbocharger on the ISL9 which helps reduce overall parasitic loss.
Ratings for the ISX12 include 385 hp (287 kW) and 425 hp (317 kW). Engine and aftertreatment extended warranty options are available, ranging from five years/200,000 miles to five years/500,000 miles.
The 2013 ISL9, rated 380 hp (283 kW), includes heavy-duty features such as replaceable wet liners, roller followers, bypass oil filtration and targeted piston cooling. The addition of an air intake throttle on the ISL9 leads to improved exhaust gas recirculation (EGR) efficiency, delivering up to 2% better fuel economy compared with the previous model, Cummins said. There are also extended warranty options available for the ISL9, ranging from five years/200,000 miles to five years/500,000 miles.
The 2013 Cummins engines also incorporate the Cummins Aftertreatment System with diesel particulate filter (DPF) and selective catalytic reduction (SCR).