INVESTIGATION ON INCREASING COMPRESSION RATIO TO IMPROVE THERMAL EFFICIENCY OF HYDROGEN-GASOLINE DUAL ENGINES

During addition of a small amount of hydrogen into the gasoline-air mixture, the ignition limit of the gasoline will be extented, the velocity of the flame propagation will be increased, thus the rapid combustion of the lean mixtures can be realized, therefore, increase thermal efficiency and decrease pollutions as well as improve detonation tendency of the gasoline engine. By burning gasoline-hydrogen mixed fuel to increase the compression ratio could rise futher the thermal efficiency. On account of detonation phenomena appear easier in the L-type combustion chamber, we chose a side-valre engine as our testing engine. This paper discusses the possibility to increase compression ratio and describes in detail the experimental results on the mixed fuel combustion with compression ratio 6.0 and compression ratio 6.49 respectively.