Power device

Abstract

To suppress abnormal combustion in a spark ignition type internal combustion engine using hydrogen as a main fuel.SOLUTION: A power plant 10 comprises an internal combustion engine 12 that burns an air-fuel mixture containing hydrogen to obtain power, and a reformer 42 into which a portion of the exhaust gas from the internal combustion engine 12 and hydrogen are introduced and which reacts nitrogen oxides in the exhaust gas with the introduced hydrogen to produce ammonia. The ammonia produced by the reformer 42 is directly injected into a cylinder 14 through an ammonia injection valve 38. Abnormal combustion of hydrogen is suppressed by supplying the flame-retardant ammonia to the cylinder 14.SELECTED DRAWING: Figure 1