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Hydrogen Operated SI Engines, its Consequences on Performance, Environment and Safe Use: a Review

N.S.Gandhi A.V.Kulkarni, Dr. R.S.Jahagirdar

From experience since 1970 various researchers and engineers attempting to produce a best suitable and reliable way to replace existing fossil fuels such as gasoline, diesel etc. Hydrogen gas has been considered as a best alternative to gasoline in case of SI engine and diesel in case of CI engine. Automobile exhaust pollution has considerable contribution in today’s overall pollution levels. The best suitable alternative fuels such as hydrogen reduces this critical pollution levels. Hydrogen combustion produces very clean exhaust due to its desirable characteristics. When hydrogen tested on various SI engines as solely or partially at various parametric levels then in all experiments it reduces pollution levels drastically compared to that of SI engine which running purely on petrol. Hydrogen burning lowers the HC, CO and NOX levels. As of now hydrogen combustion is dangerous due to back fire problems, but newly developed technologies and science in fire arresters ensures us the backfire free operation of hydrogen operating engine and same time make it possible to control hydrogen supply precisely. In this paper by using work done so far the discussion is made on performance and emissions behaviour of hydrogen fuelled SI engine and its safe use.