On-board thermochemical energy recovery technology for low carbon clean gasoline direct injection engine powered vehicles

Research output: Contribution to journalArticlepeer-review


  • Daniel Fennell
  • Paul Millington
  • Kirsty Cockle
  • John Pignon

Colleges, School and Institutes


Exhaust gas fuel reforming is a catalytic process that reclaims exhaust energy from the high temperature engine exhaust stream to drive catalytic endothermic fuel reforming reactions; these convert hydrocarbon fuel to higher enthalpy hydrogen-rich gas known as reformate. This technique has the potential to improve the thermal efficiency of internal combustion engines, as well as to simultaneously reduce gaseous and particulate emissions. This study demonstrates a novel, prototype exhaust gas fuel reformer integrated with a modern, turbocharged, 4-cylinder GDI engine and analyses the effects on engine performance, combustion characteristics and emissions. The results suggest that exhaust gas fuel reforming raises the engine fuel efficiency through a combination of: exhaust energy recovery; improved engine thermal efficiency; and enhanced combustion at highly dilute operation, which considerably reduces NOx emissions by up to 91% and improves engine fuel consumption by up to 8%. The presence of hydrogen and exhaust gas diluents in the combustion charge also reduces particle formation for lower total particulate matter (PM) emissions (up to 78% and 84% for number and mass, respectively


Original languageEnglish
JournalProceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering
Publication statusPublished - 27 Sep 2017