LOUISVILLE, KY. The latest calibrations and optimized combustion process introduced at the beginning of this year in Cummins’ ISX15 engine has resulted in a 6% improvement in fuel economy, the company said during the Mid-America Trucking Show here.

When compared to the 2007 ISX engine, the 6% improvement is an average, and could be more, according to Steve Charlton, vice president & chief technical officer-Engine Business.

“Using our extensive bank of real-world data from customer field units and by working closely with our customers, we have been able to deliver significant calibration improvements that positively impact both fuel consumption and diesel exhaust fluid consumption,” Charlton said. “We know that many of our customers will realize even better than a 6% improvement. The range of improvement will vary depending on the customer’s actual load factors and duty cycles.”

Add in the capabilities of Cummins PowerSpec, and fleets can realize the full benefits of the new ISX15, Cummins said.

“PowerSpec is a key component in the value that we deliver to our customers,” said Jeff Jones, vice president - sales & market communications. “PowerSpec offers Cummins customers the ability to maximize fuel economy and enable performance features to best meet their operation’s needs.”

PowerSpec is a free software tool, available at www.powerspec.cummins.com, designed for any on-highway customer to easily configure Cummins engines to the unique needs of their operation. It includes a gearing calculator, feature/parameter settings, fault code management and trip information.

The gearing calculator allows customers to set their vehicle for optimal fuel economy. The software also allows customers to configure proprietary engine features and parameters, such as road speed governor, idle speed management, load-based speed control and gear-down protection. Customer preferences can be saved as a template to be downloaded to the engine.

PowerSpec is also capable of reading fault codes and trip information, making it easy to get accurate information from the engine electronic control module.

The software supports all Cummins 2010 on-highway engines (ISX15, ISX11.9, ISL9, ISC8.3 and ISB6.7), 2007 engines (ISX, ISM, ISL, ISC and ISB) and earlier engines.