Invention Reference Number

This invention presents a hydrogen-fueled combustion engine designed to significantly reduce carbon dioxide and nitrogen oxide (NOx) emissions while maintaining high efficiency and performance characteristics similar to conventional diesel engines. The engine utilizes a novel combustion strategy and a non-urea aftertreatment system to achieve near-zero tailpipe NOx emissions and eliminate CO2 emissions.
Description
The proposed concept uses an actively fueled prechamber and high-pressure direct injector system to achieve mixing-controlled combustion (MCC) with hydrogen. The prechamber jet flames act as an ignition source for the direct injected hydrogen, allowing for a rapid and controlled combustion process similar to that of diesel engines. The engine also integrates a non-urea SCR aftertreatment system, where a dedicated engine cylinder produces ammonia on-board for use as a NOx reductant. This innovative hydrogen combustion engine offers a sustainable alternative to diesel-powered engines, contributing to cleaner, more efficient commercial and industrial transportation.
Benefits
- Zero CO2 Emissions: The engine is fueled entirely by hydrogen, leading to no CO2 emissions during operation.
- Near-Zero NOx Emissions: The innovative aftertreatment system controls NOx emissions without the need for urea, reducing environmental impact.
- Comparable Diesel Engine Performance: The engine maintains the performance characteristics of traditional diesel engines, including high efficiency, power density, and torque response.
- Cost Reduction: By eliminating the need for urea, the technology reduces both initial and operating costs, making it more cost-effective than traditional diesel engines.
Applications and Industries
- Commercial Vehicles: Including heavy-duty on-road trucks, locomotives, and off-road equipment
- Marine Vessels: Potential applications for hydrogen-powered marine engines, supporting emission reduction in maritime transportation
- Mining, construction, and agriculture
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051