An Improved Approach to the Instantaneous IMEP Method for Piston-Ring Assembly Friction Force Measurement

• YUN Jeong Eui

• KIM Sung Soo

抄録

The instantaneous IMEP method is advantageous in that it is feasible for piston friction measurement with minor engine modification, while its weakness is the low accuracy achievable in the end result. Because of error accumulation from various input data measurements and ensuing data processing, its result is bound to have a low confidence level. For minimization of the error, the frequency response function was determined for each measuring system, and the relative time delays among the measured signals were obtained by the application of the cross-correlation function. In order to further increase the accuracy, an accelerometer was installed at the piston skirt for direct inertia force measurement of the piston assembly. In addition, the crank case pressure was measured. Relatively reliable friction data were obtained up to 2000rpm motoring and 1500rpm firing conditions after taking these appropriate measures.

収録刊行物

• JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties

  JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties 35 (2), 310-318, 1992

  一般社団法人 日本機械学会

キーワード

• SI Engine
• Friction
• Instantaneous IMEP
• Piston
• Ring
• Dynamic Effects
• Filter
• FRF
• Time Delay
• Response Time

詳細情報

• CRID: 1390282680401785088
• NII論文ID: 110002492629
• NII書誌ID: AA10680596
• DOI: 10.1299/jsmeb1988.35.2_310
• ISSN: 09148817
• Web Site: https://www.jstage.jst.go.jp/article/jsmeb1988/35/2/35_2_310/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可