| HAO Li-chun,YANG He,ZHANG Wei-li,LU Wen-tong,LIU Shun-tao,ZHANG Jian-rong.Friction-reduced Property of 0W-16 Low Viscosity Engine Oil[J],49(9):72-80 |
| Friction-reduced Property of 0W-16 Low Viscosity Engine Oil |
| Received:July 22, 2020 Revised:September 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.09.007 |
| KeyWord:0W-16 engine oil MoDTC friction modifier friction and lubrication friction coefficient synergistic effect SRV |
| Author | Institution |
| HAO Li-chun |
SINOPEC Research Institute of Petroleum Processing, Beijing , China |
| YANG He |
SINOPEC Research Institute of Petroleum Processing, Beijing , China |
| ZHANG Wei-li |
SINOPEC Research Institute of Petroleum Processing, Beijing , China |
| LU Wen-tong |
SINOPEC Research Institute of Petroleum Processing, Beijing , China |
| LIU Shun-tao |
SINOPEC Research Institute of Petroleum Processing, Beijing , China |
| ZHANG Jian-rong |
SINOPEC Research Institute of Petroleum Processing, Beijing , China |
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| Abstract: |
| The work aims to investigate the friction-reduced property of 0W-16 low viscosity engine oil. Three kinds of friction modifiers MoDTC, GMO, and oleamide were respectively added into 0W-16 base oil to obtain oil sample with single friction modifier. Moreover, two kinds of fully-formulated low viscosity engine oil 0W-16 (oil A-1 and oil A-2) were selected. The friction-reduced property and extreme pressure property of the lubricating oil samples were tested by the SRV-IV tribometer. The compositions of fully-formulated engine oil samples were analyzed by FTIR spectormeter and oil element spectormeter. The wear scar of cylinder liner segment was analyzed by 3D optical surface profilometer. Compared with 0W-16 base oil, oil sample with single friction modifier of MoDTC, GMO and oleamide respectively had an average friction coefficient decreasing from 0.198 to 0.088~0.116, 0.167~0.178 and 0.179~0.194, respectively. The average wear scar depth of cylinder liner segments decreased from 3.59 mm to 0.44~0.52 mm, 2.11~2.24 mm and 3.19~3.44 mm, respectively. For the fully-formulated engine oil 0W-16, oil A-1 showed lower friction coefficient than oil A-2 in low temperature testing condition. When the testing temperature increased, the friction coefficients of oil A-1 and oil A-2 decreased further. The average wear scar depth of cylinder liner segments of oil A-1 and oil A-2 were 0.13 mm and 0.18 mm respectively after friction and lubrication test. The extreme pressure of oil A-1 and oil A-2 was 1500 N and 900 N respectively in extreme pressure test. When the base oil 0W-16 is blended with the three kinds of friction modifiers respectively, the oil with MoDTC shows the best friction-reduced property and anti-wear property, and the oil with oleamide shows the worst friction-reduced property and anti-wear property. For the fully-formulated engine oil A-1 in low temperature testing condition, there is a good synergistic effect between MoDTC and no-ash friction modifier, and oil A-1 shows lower friction coefficient. For the oil A-1 and oil A-2, when the testing temperature increases, ZDDP and MoDTC generate good synergistic effect and the friction coefficient decreases further. In the extreme pressure test, oil A-1 shows higher extreme pressure due to the good synergistic effect between ZDDP and other additives. The synergistic effects between additives have an important influence on the energy-saving property of engine oils. |
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