SuperTruck II with higher efficiency

Navistar announced a partnership with the U.S.renewable energyDepartment of Energy (DOE) in cooperation with the International Supertrucks The International SuperTruck II achieves 16 mpg through hybrid technology.efficiencyThe International SuperTruck I, which was the benchmark vehicle in 2009, improved freight efficiency by 1,701 TP3T, among other improvements.

It also demonstrates innovative technological approaches to weight reduction through rolling resistance technologies, aerodynamic improvements, and powertrain technologies designed to provide premium freight transportation efficiencies to help reduce the U.S. commercial vehicle segment's dependence on fossil fuels.

“With co-funding from the U.S. Department of Energy, Navistar engineers experimented with forward-thinking technologies not currently available in the Class 8 truck market to accelerate the impact of sustainable transportation,” said Russ Zukouski, Global Innovation Chief Engineer and Principal Investigator for the SuperTruck Program. In a statement. “The team focused the design on high-pressureelectrificationOn top of that, full electrification is achieved using hybrid technology, which has the potential to be purelyelectric vehiclein commercialization and improve customers” total cost of ownership (TCO) and business operations."

The International SuperTruck II common program goals were to improve Class 8 vehicle efficiency and reduce U.S. dependence on fossil fuels, with a focus on improving next-generation vehicle efficiency through hybrid and aerodynamic technologies. Results showed a 1,701 TP3T improvement in vehicle freight efficiency, a 551 TP3T improvement in engine brake thermal efficiency, an assessment of TCO opportunities for each technology, and a high-voltage electrification effort that modeled hybrid technologies that could be used in all-electric vehicles.

“Navistar is the only OEM that builds trailers to provide the most accurate test results,” said Dean Oppermann, chief engineer at Advanced Truck. “It includes a 100% composite box designed for minimal aerodynamic drag, light weight, integrated crossmembers, controlled underbody flow with composite aerodynamic treatments, next-generation with connectivity optionssolar energybatteriesboards as well as ride height control.”

The International SuperTruck II is a hybrid vehicle with an internal combustion engine with high-pressure accessories and technology developed in cooperation with Bosch, underscoring Navistar's commitment to an electrified future. The engine has been improved in key areas such as combustion, friction, gas exchange and engine airflow. A redesigned cylinder head featuring a dual overhead camshaft engine and enhanced fuel system delivers a 2% fuel economy improvement over the International SuperTruck I. Aftertreatment system improvements includediesel fuelEngine exhaust fluid (DEF) dosing, improved blending and lower restriction, and new selective catalytic reduction (SCR) formulations deliver high NOx emission reductions and shorter cold-start activation times.

“A complete systems approach was required to achieve the 55.2% brake thermal efficiency,” said Jim Cigler, senior engine chief engineer. “The in-house engineering team and researchcooperative partnerArgonne National Laboratory identified opportunities through detailed analysis and simulation. System suppliers such as Bosch, Jacobs Vehicle Systems, and Applied Nano Systems (ANS) brought new approaches to critical systems that led to laboratory success and improved real-world fuel economy.Navistar was able to find new ways to take our engines to new levels of efficiency. ”

International SuperTruck II emphasizes connecting with next-generation predictive cruise control and leveraging technology and information within the larger Traton group to explore vehicle-to-everything technologies to improve safety and vehicle efficiency.

“Our goal is to continue to advance internal combustion engine technology as efficiently and sustainably as possible until it is on par with zero-emission vehicles,” said Opperman. “Developing both technologies simultaneously ensures a smooth technology transition to best meet customer needs. We focus on the entire product ecosystem - product development itself, as well as infrastructure charging, service and support for vehicle operation, and end-of-life batteries.”