Proposal and Verification of Friction Coefficient Calculation Model by True Contact and Oil Film (Evaluation of Piston Ring and Sleeve)
真実接触と油膜による摩擦係数算出モデルとその検証（ピストンリングとスリーブ）
- Delivery
- Available on the other site
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- Paper/Info type
- Honda R&D Technical Review
Vol.33 No.1
- Pages
- 50-56(Total 7 p)
- Date of publication
- Mar 2021
- Publisher
- Others, Unknown
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Technical Papers and Explanation |
| Author(J) | 1) 古賀 秀晴, 2) 松本 謙司, 3) 小野 佑樹 |
| Author(E) | 1) Hideharu KOGA, 2) Kenji MATSUMOTO, 3) Yuki ONO |
| Affiliation(J) | 1) 本田技術研究所, 2) 本田技術研究所, 3) 本田技術研究所 |
| Affiliation(E) | 1) Honda R&D , 2) Honda R&D , 3) Honda R&D |
| Abstract(J) | しゅう動部品を検討する際，その摩擦係数を考慮するが，エンジンのピストンリングとスリーブのように比較的高速域となるとそのしゅう動試験自体が難しく，しゅう動特性が分かり難い．そこで，Liuらが提唱する確率論的手法に初期なじみ後の表面粗さやうねりを適用し，Guptaらの油膜厚さ減少係数を高速域に用いた．更に高速域で支配的になるすべりを考慮した新たな計算モデルを提案した．従来実施が容易でなかった高速域でのしゅう動試験を新規開発のドラムカム式試験機により実施可能とした．本モデルの妥当性を8 m/sまでのしゅう動試験結果と比較することで検証した．結果，本モデルの摩擦係数は，一般的なスリーブ材であるCast gray iron（FC250）において8 m/sの高速域まで実験結果と高い一致性が得られていることが確認できた．また，いままで求める事のできなかった高速域での摩擦係数を得る事ができると共に検証試験速度以上の高速域摩擦係数を予測する事が可能となった． Translation |
| Abstract(E) | The investigation of sliding parts takes into account the coefficient of friction of the parts. When the parts are in a relatively high-speed region, such as the piston rings and sleeves in an engine, sliding test performance itself is a challenge and the tribological properties cannot readily be determined. Therefore, surface roughness and waviness after initial familiarity were applied to a stochastic method proposed by Liu, et al., and the oil film thickness reduction coefficient of Gupta, et al., was used in high-speed regions. In addition, a new calculation model was proposed that takes into sliding, which becomes a determining factor in higher-speed regions. As conventionally performed, sliding tests could not readily be implemented in high-speed regions. However, a newly developed drum cam test apparatus has made such testing possible to implement. The validity of this model was verified by comparison and the results of sliding tests up to 8 m/s. The results verified that the coefficient of friction in this model match very closely with the results of tests using ordinary sleeve material of cast gray iron (FC250) in high-speed regions up to 8 m/s. In addition, it has become possible to obtain the coefficient of friction in high-speed regions, which had not been possible to determine up to now. It has also become possible to predict the coefficient of friction in high-speed regions where the velocities are equal to or higher than in the verification tests. |
