(3) With regard to the multigrade lubricant, Pf greatly reduces due to the shear thinning effect while Fmax increases resulting in the severe lubrication condition at the beginning of the expansion stroke. The application of the multigrade lubricant with low HTHS viscosity may result in danger of increased wear and scuffing.
(4) Comparing the calculation results with the friction diagram and the values of Fmax, and Pf obtained from the experiment, it is found that considerably good agreements regarding to the qualitative tendency are obtained although there is a partial disagreement.
The authors would like to acknowledge Mr. F.Shimada of Oita University for his kind cooperation.
Reference
1) Wakuri.Y., et al., SAE Paper 952471 (1995).
2) Patir,N. and Cheng,H.S., Trans.ASME. Ser.F, Vol.100. No.1 (1978-1), P.12.
3) Patir,N. and Cheng,H.S., Trans.ASME, Ser.F, Vol.101, No.2 (1979-4), P.220.
4) Rohde,S.M., Proc. the 7th Leeds-Lyon Symposium on Tribology, (1980), Westbury House, P.262,.
5) Greenwood,J.A. and Tripp,J.H., Proc. Instn.Mech.Engr., Vol.185, No.45 (1971), P.625.
6) Ruddy,B.L., et al., Proc. the 9th Leeds-Lyon Symposium on Tribology, (1982), Butterworths, P.109.
7) Richez,M.F., et al., Proc. the 9th Leeds-Lyon Symposium on Tribology, (1982), Butterworths, P.122.
8) Sui,P.C. and Ariga,S.E., SAE Paper931937 (1993).
9) Hu,Y., et al., Trans. ASME, J.Tribol., Vol.116 (1994-7), P.470.
10) Hamatake,T., et al., Proc. ISME YOKOHAMA'95 Vol.II, (1995), P.142.
11) Hamatake.T., et al., Trans. JASE (in Japanese), Vol.27, No.3 (1997-7), P.83.
12) Taylor,R.I., et al., SAE Paper 941981 (1994)
13) Taylor,R.I., et al., Proc. Int. Trib. Con. Yokohama 1995, Vol.III, (1996),P.1423.
14) Wright.B., et al., SAE Paper 830027 (1983).
15) Tian,T., et al., SAE Paper 96032 (1996).
16) Arcoumains,C., et al., SAE Paper 972924 (1997).
17) Wakuri,Y., et al., Trib. Int. 25-5 (1992-12), P.299.
18) Dowson,D., et al., Proc. the 13th Leeds-Lyon Symposium on Tribology, (1986), Elesevier Science. P.599.
19) Wakuri,Y., et al., Trans. Jpn. Soc. Mech. Eng. (in Japanese), Vol.64, No.618, C (1998-2), P.676.
20) Wakuri.Y., et al., Trans. Jpn. Soc. Mech. Eng. (in Japanese), Vol.62, No.599, C (1996-8), P.2811.
21) Wakuri,Y., et al., Trans. Jpn. Soc. Mech. Eng. (in Japanese), Vol.58, No.551, C (1992-7). P.2293.
