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Please use this identifier to cite or link to this item: http://hdl.handle.net/11178/4712

Title: ディーゼル機関全摩擦損失の低減に関する研究(機械工学科)
Other Titles: Studies on Reduction of Total Friction Loss for Diesel Engine(DEPARTMENT OF MECHANICAL ENGINEERING)
Authors: 副島, 光洋
松下, 祐樹
坂口, 慎吾
Soejima, Mitsuhiro
Matsushita, Yuuki
Sakaguchi, Shingo
ソエジマ, ミツヒロ
マツシタ, ユウキ
サカグチ, シンゴ
九州産業大学工学部機械工学科 / 九州産業大学大学院工学研究科機械工学専攻 / 九州産業大学工学部機械工学科
Keywords: Diesel Engine
Frictional Power Loss
Run-out Method
Total Friction Mean Effective Pressure
Piston System
Multi-grade Engine Oil
HTHS Viscosity
Low-SAPS Oil
Issue Date: Dec-2007
Publisher: 九州産業大学工学部
Abstract: In order to prevent the global warming the improvement of fuel economy for internal combustion engines should be more thoroughly done in both technological fields of the combustion and the tribology. In this paper some experimental study results on the reduction of frictional power loss in a practical diesel engine are described. The total friction loss has been measured by the run-out method for fired and braked engines. The total friction mean effective pressures P_tf changing with the engine speed, load rate and cooling water temperature have been examined for following design factors concerned with the piston system and the engine lubricating oil. The effects of the sliding surface roughness or coating of piston components on the reduction of P_tf are evaluated, followed by those of the engine oil properties, namely lowering the viscosity of single grade oils, applying the low viscosity multi-grade oils SAE10W30 and SAE5W30. Also, the influence of the oil deterioration on P_tf has been examined. Further, the diesel engine oils have been refined to be DL-class or DH-class oils lower in sulfated ash, phosphorus and sulfur contents formulated as Low-SAPS oils to protect the diesel particulate filter and the deNOx catalyst. Therefore, the influences of the Low-SAPS oils like DH-1, DH-2 and other newly developed oils less in additives ZnDTP have been examined. Likewise, the effects of lowering the viscosity of the Low-SAPS oils on the reduction of P_tf are evaluated.
URI: http://hdl.handle.net/11178/4712
Appears in Collections:第44号

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