Low NOx Emission Automobile Liquid Hydrogen Engine by Means of Dual Mixture Formation

Paper #:
  • 930757

Published:
  • 1993-03-01
Citation:
Koyanagi, K., Hiruma, M., Hashimoto, H., Yamane, K. et al., "Low NOx Emission Automobile Liquid Hydrogen Engine by Means of Dual Mixture Formation," SAE Technical Paper 930757, 1993, https://doi.org/10.4271/930757.
Pages:
14
Abstract:
According to authors' previous research, high pressure hydrogen engines with direct injection right before TDC and spark ignition obtain high performance and eliminate almost. abnormal combustion.This study has clarified the mooted points in the flame propagation to adjacent jets and the control of the optimum spark timing and large NOx emissions even in leaner than excess air ratio of λ=2. Nitric oxides (NOx) is the only the pollutant in the exhaust gases emitted by hydrogen engines. It has been found that the NOx formation largely depends on the mixture formation method. In order to operate the engine in a small amount of NOx, an experimental study was carried out to investigate the reduction of NOx and the output power by using dual mixture formation method, external mixture formation and direct injection.
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