Studies on the measuring method of the total friction loss of internal combustion engines |
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| Institution: | 1. Faculty of Engineering, Kyushu Sangyo University, 3-1, Matsukadai 2-Chome, Higashiku, Fukuoka, 813 Japan;2. Faculty of Engineering, Fukuoka University, 19-1, Nanakum 8-Chome, Jonanku, Fukuoka, 814 Japan;3. Faculty of Engineering, Kyushu University, 10-1, Hakozaki 6-Chome, Higashiku, Fukuoka, 812 Japan;1. University of Lyon, CNRS, ENI-Saint-Etienne, LTDS UMR 5513, F-42023-France;2. University of Lyon, CNRS, INSA-Lyon, LaMCoS UMR 5259, France;3. University of El Manar, ENIT, BP 37, Le Belvedere, 1002, Tunisia;4. University of Lyon, CNRS, Université Jean Monnet, LHC UMR 5516, France;1. College of Industrial Technology, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand;2. Research Centre for Combustion Technology and Alternative Energy (CTAE), Science and Technology Research Institute, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand;1. Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung, Taiwan;2. Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, Taiwan;3. Department of Civil Engineering, National Cheng Kung University, Tainan, Taiwan;4. Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung, Taiwan |
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| Abstract: | In the present study a new test method is investigated to measure the total friction loss of engines over the whole range of speed and load. It is based on the idea that the friction loss close to the true one of fired and braked engines can be measured by the run-out method because the temperature mainly influencing the friction loss is almost stable for the short run-out test duration. From the test results and the comparison with those measured by other conventional test methods, the following becomes evident: - 1.(1) The total friction mean effective pressure slightly increases as the revolution speed becomes high, but it decreases as either the load or the cooling water temperature becomes high.
- 2.(2) The total friction mean effective pressure measured by the present method is smaller than that measured by the run-out method, the motoring method or Willans-line method, but it is larger than that measured by the indicated pressure diagram method.
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