Experimental Evaluation of SI Engine Operation Supplemented by Hydrogen Rich Gas from a Compact Plasma Boosted Reformer 2000-01-2206
It is well known that hydrogen addition to spark-ignited (SI) engines can reduce exhaust emissions and increase efficiency. Micro plasmatron fuel converters can be used for onboard generation of hydrogen-rich gas by partial oxidation of a wide range of fuels. These plasma-boosted microreformers are compact, rugged, and provide rapid response. With hydrogen supplement to the main fuel, SI engines can run very lean resulting in a large reduction in nitrogen oxides (NOx) emissions relative to stoichiometric combustion without a catalytic converter. This paper presents experimental results from a microplasmatron fuel converter operating under variable oxygen to carbon ratios. Tests have also been carried out to evaluate the effect of the addition of a microplasmatron fuel converter generated gas in a 1995 2.3-L four-cylinder SI production engine. The tests were performed with and without hydrogen-rich gas produced by the plasma boosted fuel converter with gasoline. A one hundred fold reduction in NOx due to very lean operation was obtained under certain conditions. An advantage of onboard plasma- boosted generation of hydrogen-rich gas is that it is used only when required and can be readily turned on and off. Substantial NOx reduction should also be obtainable by heavy exhaust gas recirculation (EGR) facilitated by use of hydrogen-rich gas with stoichiometric operation.
Citation: Green, J., Domingo, N., Storey, J., Wagner, R. et al., "Experimental Evaluation of SI Engine Operation Supplemented by Hydrogen Rich Gas from a Compact Plasma Boosted Reformer," SAE Technical Paper 2000-01-2206, 2000, https://doi.org/10.4271/2000-01-2206. Download Citation
J. B. Green, N. Domingo, J. M. E. Storey, R. M. Wagner, J. S. Armfield, L. Bromberg, D. R. Cohn, A. Rabinovich, N. Alexeev
Oak Ridge National Lab., MIT Plasma Science and Fusion Center
Emission Control and Fuel Economy for Port and Direct Injected SI Engines-PT-91, SAE 2000 Transactions Journal of Engines-V109-3