Summary

The invention provides a commercially acceptable diesel combustion system that meets environmental standards for NOx and PM emissions (0.2 g/bhp-hr and smoke levels ? 3 BSN, respectively) without the need for expensive “after-treatment” device


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Patent Information:  USPTO Site Listing  
  Patent Title: Low Emission Diesel Combustion System with Low Charge-Air Oxygen Concentration Levels and High Fuel Injection Pressures  
  Patent Number: 6857263  
  Issue Date: 2/22/2005  
  Lab Name: Office of Air and Radiation
Office of Transportation and Air Quality
National Vehicle and Fuel Emissions Laboratory		  
  Location: Ann Arbor, MI  
  Contact: WVHTC Foundation  
 
Technical Description:
  Diesel engines contribute significantly to atmospheric pollutants such as nitrogen oxides (NOx) and particulate matter (PM), exceeding acceptable environmental emissions levels. Nevertheless, they remain popular because of their fuel efficiency superiority over gasoline engines. For many years, therefore, diesel engines have represented a compromise between fuel efficiency and atmospheric pollution.

The invention provides a commercially acceptable diesel combustion system that meets environmental standards for NOx and PM emissions (0.2 g/bhp-hr and smoke levels ? 3 BSN, respectively) without the need for expensive “after-treatment” devices, while maintaining diesel-like fuel efficiency.
 
Industry Significance:
  Two approaches used to reduce NOx and PM emissions from diesel engines are exhaust gas recirculation (EGR) to reduce combustion temperatures and NOx formation, and high pressure fuel injection to improve in-cylinder mixing of fuel and air, thereby reducing PM. Both of these technologies are associated with NOx-PM tradeoffs. Although EGR results in a reduction of NOx formation, there is a concomitant rise in produced PM.

Conversely, while high pressure fuel injection reduces PM, the resultant higher combustion temperatures generate more NOx. Not surprisingly, EGR and high pressure fuel injection have experienced only moderate commercial usage. The technology, by operating within a specific set of parameters, provides a commercially viable power system producing NOx and PM emissions at or below environmental standards.
 
Potential Applications:
  The technology has the potential to significantly improve upon these diesel engines as it can simultaneously lower both NOx and PM emissions without the need for “after-treatment” devices, yet maintain high engine efficiency.
 
Partnership Opportunities:
 

The commercial potential is high, despite similar technology already available in the marketplace. Ford Motor Company has recently introduced its new diesel engine in Europe, and Nissan Diesel America, Inc. has commercialized a new diesel technology in heavy-duty trucks in Japan and Australia. Both engines have been designed to meet new, stringent emissions standards.

The invention could capture a large share of the multi-billion dollar automobile industry, since tremendous potential exists for industrial partnerships and collaborations as auto manufacturers strive to produce efficient engines with emissions that equal or better strict environmental standards. These manufacturers include the ones listed above and General Motors and Toyota.

The EPA is seeking viable partners for licensing and/or cooperative research to further develop the technology for future agency needs and the specific needs and requirements of the industry partner.

http://www.epatechmatch.com/EPA/PATENT/BROWSEFEATURED.ASPX#