The next generation of U.S. combat vehicles could be powered by a revolutionary engine developed by Cummins Inc. A $47 million defense contract tasks the company with creating the Advanced Combat Engine (ACE), a Cummins Opposed Piston Engine designed to be more powerful, compact, and less detectable by enemy forces. This project represents a significant milestone for Cummins, marking one of its largest research contracts with the military.
The Challenges of the Cummins Opposed Piston Engine
The National Advanced Mobility Consortium outlined three key requirements for the ACE project. According to Wayne Eckerle, Cummins Vice President of Research and Technology, the most demanding challenge is reducing heat rejection by 21% compared to existing combat engines, also produced by Cummins. High heat signatures make vehicles vulnerable to detection by infrared and other technologies. Minimizing heat output reduces the need for large cooling systems, enhancing stealth capabilities.
Cummins is collaborating with Achates Power, a California-based company known for its opposed piston engine technology. This partnership leverages Achates’ innovative engine design and Cummins’ manufacturing expertise to create a production-ready Cummins opposed piston engine. Besides reduced heat rejection, the project aims to increase power density by over 50% compared to current combat engines.
Power and Protection in a Smaller Package
The military requires an engine that delivers increased power within a confined space. Although tanks appear large, the engine compartment is surprisingly limited. A smaller, more powerful engine allows for increased armor and protection for the crew without sacrificing performance. This higher power density directly contributes to troop safety.
The reduced size of the Cummins opposed piston engine allows for more protective covering on the vehicle. This extra space for armor enhances survivability for personnel inside. The increased power enables the vehicle to carry this added weight without compromising mission objectives.
Fuel Efficiency and Future Applications
A third requirement for the ACE project is a 13% reduction in fuel consumption. Cummins has begun research and development at its Columbus headquarters, with prototype parts expected soon. Prototype engines will be built at the Seymour facility, followed by full powertrain demonstrations to validate the engine’s performance against specifications.
Cummins was selected for this contract due to its ability to transition the concept into production. The company’s focus is refining Achates’ design into a manufacturable and commercially viable Cummins opposed piston engine. While the ACE project is primarily for military applications, the technology holds potential for commercial use in marine and industrial sectors. This contract could pave the way for advancements in Cummins engines across various industries.
Conclusion
The development of the Cummins opposed piston engine under the ACE project marks a significant leap forward in engine technology. By addressing crucial requirements for reduced heat signature, increased power density, and improved fuel efficiency, Cummins aims to enhance the capabilities and safety of future combat vehicles. This project highlights Cummins’ commitment to innovation and its potential to impact both military and commercial applications.
