Studies on Tribology Characteristics of Dynamically Loaded Sliding and Rolling Contact Surfacces under Soot-Abrasive Contamination in Lubricating Oil

润滑油烟炱磨料污染下动载滑动和滚动接触面摩擦学特性研究

• 批准号: 12650151
• 负责人: SOEJIMA Mitsuhiro
• 金额: $ 2.24万
• 依托单位: Kyushu Sangyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650151/
• 关键词: Internal Combustion Engine; Engine Component; Tribology; Friction; Wear; Lubricating Oil; Soot Contamination; Dynamic Load Contact; Internal Combustion Engine; Engine Component; Tribology; Friction; Wear; Lubricating Oil; Soot Contamination

In order to improve the fuel economy and reliability of internal combustion engines it is required to apply the low viscosity multi-grade lubricating oils formulated as low friction engine oils and take measures against the oil deterioration and contamination caused by the EGR soot. There, the tribology problem becomes serious, namely, the friction and wear increase at the dynamically loaded sliding and rolling contact surfaces such as engine components of the piston system, bearing system and valve gear mechanism because the oil film thickness is extremely thin under the lubrication of low viscosity oil contaminated with the soot abrasive. Therefore, design criteria to reduce the friction and prevent the wear have been investigated by examining the influences of the soot abrasive mediating in the thin viscous shear flow area and by clarifying the mechanism and factors of friction and wear.The influences of the engine oil deterioration and contamination with the soot on the total frict … More ional power loss of an actual diesel engine, the friction and wear between a cam and a slipping follower or the friction between a cam and a flat tappet or a roller tappet have been examined. The research results were made obvious as follows. The total friction tends to decrease when the oil is a few deteriorated and contaminated with the soot. The friction and wear for the slipping follower depends on the soot amount, the soot size and the kind and combination of oil additives. When lubricated with the oil contaminated with the soot the friction for the roller tappet tends to increase under the high rotational speed. Tribology characteristics for the oil mixed with the carbon black being substitute for the exhaust gas soot.Accordingly, the following researches should be left in future studies to investigate the factors and mechanism of friction and wear. Actual contacts such as the piston and cylinder or the cam and follower are simulated in a test equipment to visualize the dynamically loaded sliding and rolling lubricated surfaces.The characteristics of a dynamically viscous shear flow for the oil mixed with the soot is clarified by observing the behavior of soot particles and the occurrence of oil starvation and by calculating the oil film thickness and pressure distributions analytically. It is examined how much the tribo-chemically reacted film is formed under the oil deterioration and contamination with the soot. It is a key to examine the influences of the soot amount and particle size distribution on the friction and wear, those of the nominal and effective oil viscosities, those of the kinds and combination of oil additives and so on. Less

为了提高内燃机的燃料经济性和可靠性，需要应用配制为低摩擦发动机油的低粘度多级润滑油，并采取措施防止由EGR烟灰引起的油劣化和污染。在那里，摩擦学问题变得严重，即，在诸如活塞系统、轴承系统和阀齿轮机构的发动机部件的动态负载滑动和滚动接触表面处的摩擦和磨损增加，因为在被烟灰磨料污染的低粘度油的润滑下油膜厚度非常薄。因此，本文通过考察碳烟磨料在稀薄粘性剪切流区的作用，阐明了摩擦磨损的机理和影响因素，探讨了降低摩擦和防止磨损的设计准则，并分析了机油变质和碳烟污染对总摩擦系数的影响，提出了降低摩擦和防止磨损的设计准则。 ...更多信息 对实际柴油机的功率损失、凸轮与滑动从动件之间的摩擦和磨损、凸轮与平面凸轮和滚子凸轮之间的摩擦进行了试验研究。研究结果表明：当油液中有少量变质和碳烟污染时，总摩擦力趋于减小。滑动从动件的摩擦磨损与碳烟量、碳烟尺寸以及润滑油添加剂的种类和组合有关。当用被烟灰污染的油润滑时，在高转速下，滚子轴承的摩擦趋于增加。因此，在今后的研究中，还应进一步研究炭黑替代废气碳烟后的摩擦学特性，探讨摩擦磨损的影响因素和机理。在试验装置上模拟实际接触，如活塞和气缸或凸轮和从动件，以显示动态加载的滑动和滚动润滑表面，通过观察碳烟颗粒的行为和缺油的发生，并通过分析计算油膜厚度和压力分布，阐明了与碳烟混合的油的动态粘性剪切流的特性。研究了在油变质和碳烟污染下形成的摩擦化学反应膜的量。关键在于考察碳烟量和粒度分布对摩擦和磨损的影响、机油的标称粘度和有效粘度的影响、机油添加剂的种类和组合的影响等。Less

项目成果

副島光洋, 和栗雄太郎, 江島良人, 村瀬達也, 福田清高, 川崎将隆: "動弁系カム・タペットの摩擦特性に関する研究"自動車技術会論文集. 32巻1号. 53-58 (2000)

Mitsuhiro Soejima、Yutaro Waguri、Yoshito Ejima、Tatsuya Murase、Kiyotaka Fukuda、Masataka Kawasaki：“气门机构凸轮挺杆的摩擦特性研究”日本汽车工程师学会学报，第 32 卷，第 1. 53-。 58（2000））

副島光洋, 江島良人, 福田清高, 川崎将隆: "動弁系カム・タペットの摩擦特性に関する研究(タペットの種類およびエンジン油性状・劣化の影響)"自動車技術会論文集. 32巻4号. 93-98 (2001)

Mitsuhiro Soejima、Yoshito Ejima、Kiyotaka Fukuda、Masataka Kawasaki：“气门机构凸轮挺杆的摩擦特性研究（挺杆类型和发动机油性能/劣化的影响）”日本汽车工程师学会学报第 32 卷， 4..93-98 (2001)

Mitsuhiro SOEJIMA, Yoshito EJIMA, Kenji UEMORI and Masataka KAWASAKI: "On the Changes of Tribo-Characteristics with Engine Oil Deterioration and Contaminationfor Internal Combustion Engine Components"BuUetin of the Faculty of Engineering of Kyushu Sangyo

Mitsuhiro SOEJIMA、Yoshito EJIMA、Kenji UEMORI 和 Masataka KAWASAKI：“关于内燃机部件的摩擦特性随发动机油劣化和污染的变化”九州产业工学部公告

副島光洋, 江島良人, 福田清高, 上森健司, 川崎将隆: "Friction and Wear Characteristics for Cam and Follower Influenced by Soot Contamination"Plenary and Session Key Papers from the 2nd WTC Vienna 2001. 423-428 (2001)

Mitsuhiro Soejima、Yoshito Ejima、Kiyotaka Fukuda、Kenji Uemori、Masataka Kawasaki：“受烟灰污染影响的凸轮和从动件的摩擦磨损特性”2001 年第二届维也纳 WTC 全体会议和会议关键论文。 423-428 (2001)

Toshiro HAMATAKE, Yutaro WAKURI, Mitsuhiro SOEJIMA and Tatsumi KITAHARA: "Some Studies on the Tribology of Diesel Engines"Proceedings of the 23rd CIMAC. 1426-1440 (2001)

Toshiro HAMATAKE、Yutaro WAKURI、Mitsuhiro SoEJIMA 和 Tatsumi KITAHARA：“柴油机摩擦学的一些研究”第 23 届 CIMAC 会议论文集。