Abstract
Hydrogen fuel becomes an alternative fuel because of its advantage properties. Hydrogen fuel can be used in form of H2 or HHO. On the dual-fuel systems, hydrogen may be supplied to engines by injectors or by the differential pressure in the intake manifold. This paper presented the applicability of hydrogen on gasoline engines. The paper analyzed and evaluated the methods of hydrogen fuel applications, the results of the performance and engine emissions of the latest researches in over the world. The experiments were performed at hydrogen volume ratio from 1% to 4.5% and different experimental conditions. The experimental results were compared with only-gasoline engines. The combustion cylinders pressure is increased. The thermal efficiency is increased to 7%. The emission of HC and CO emissions are decreased significantly. NOx is reduced at learn conditions and increased at other conditions.
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