Study of a Small Two-Stroke Engine with Low-Pressure Air-Assisted Direct-Injection System

Paper #:
  • 912350

Published:
  • 1991-10-01
Citation:
Huang, H., Peng, Y., Jeng, M., and Wang, J., "Study of a Small Two-Stroke Engine with Low-Pressure Air-Assisted Direct-Injection System," SAE Technical Paper 912350, 1991, https://doi.org/10.4271/912350.
Pages:
11
Abstract:
An air-assisted direct injection system has been developed and applied to a two-stroke spark-ignited motorcycle engine of 82 c.c. displacement to reduce exhaust emissions, particularly unburnt hydrocarbons. The injection system, which induces a small amount of compressed air and metered fuel from electronic-control valve, delivers the air/fuel mixture into the cylinder. This paper shows the preliminary results of engine dynamometer tests. Also investigated are the improvement of combustion and reduction of unburnt HC emission by the use of dual spark plugs and skip injection techniques at light load engine condition.
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