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Hydrogen Working Group working to advance transportation


Several organizations, encompassing companies, research labs, and academia, have come together to form the Hydrogen Opposed Piston Engine Working Group. The organization is a collaborative forum to advance sustainable transportation technology.

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“An opposed-piston engine with hydrogen combustion could well provide the best-known thermal efficiency from a reciprocating engine, with the potential to match the in-vehicle efficiency of a hydrogen fuel cell,” said James Turner, professor of mechanical engineering, clean combustion research center, King Abdullah University of Science and Technology. “If so, it is a valuable potential option for long haul transit in our quest for sustainable transportation.”

The organization says it hosts a series of meetings among its members to exchange research results, insights and ideas.  

“The direct-injection two-stroke engine could be a very promising and interesting option for hydrogen combustion to achieve zero NOx because of its advantages of high-power density and inherent much lower NOx emissions,” said Pierre Duret of DI2S Consulting & Training and former director Powertrain and Sustainable Mobility, IFP School (France). “These two-stroke advantages are even more significant with an opposed-piston engine thanks to its higher power density and efficiency.”


The founding members of the Hydrogen Opposed Piston Engine Working Group include:

  • Achates Power, San Diego, CA. 
  • Aramco Americas.
  • Bourns College of Engineering – Center for Environmental Research and Technology, University of California, Riverside, Riverside, CA. 
  • Combustion and Propulsion Systems, Chalmers University of Technology, Gothenburg, Sweden. 
  • Department of Automotive Engineering, Clemson University, Clemson, SC
  • DI2S Consulting & Training, Paris, France
  • Engine Research Center, University of Wisconsin-Madison, Madison, WI. 
  • ID-Technologies, Fribourg, Switzerland. 
  • Indian Institute of Science, Bangalore, India
  • King Abdullah University of Science and Technology, Thuwal, Saudi Arabia. 
  • Mahle Powertrain, Plymouth, MI. 
  • Marquette University, Milwaukee, WI. 
  • Powertrain Control Laboratory, University of Michigan, Ann Arbor, MI. 
  • Shell plc, London, England. 
  • SuperTurbo Technologies, Inc. 

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