This paper deals with a new type of Miller cycle gasoline engine which is installed with an intake control rotary valve, and presents the experimental investigation on the test engine which was undertaken to examine the capacity of supercharging as well as fuel economy in the application of the new system to small-sized gasoline engines. The first prototype engine did not attain a significant increase in power, as it was unable to fully utilize its anti-knock capacity, one of the most advantageous characteristics of the Miller system. This was mainly due to the deterioration of combustion. This paper discusses the results of the supercharging test of the engine which is equipped with a kind of swirl intensifying throttle plates and a more powerful ignition system for improved combustion, as well as the results of a test on reducing the geometrical ratio. The improvement of combustion was marked, and led the test engine to attain the brake mean effective pressure of 15.5 bar at relatively low boost pressure of 1.25 bar at 2000 rpm.

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  • Corporate Authors:

    Society of Automotive Engineers of Japan

    10-2 Goban-cho, Chiyoda-ku
    Tokyo,   Japan 
  • Authors:
    • Noguchi, H
    • Fujita, Y
    • SAKAI, H
    • Kanesaka, H
  • Publication Date: 1984-11

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Filing Info

  • Accession Number: 00450205
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: HS-038 543
  • Files: HSL, USDOT
  • Created Date: Nov 30 1985 12:00AM