A Study on the Mechanism of Lubricating Oil Consumption of Diesel Engines -1st report: The Effect of the Design of Piston Skirt on Lubricating Oil Consumption-

2005 ◽  
Author(s):  
Akemi Ito ◽  
Haruhisa Shirakawa ◽  
Masaaki Nakamura ◽  
Kazuyoshi Yoshida ◽  
Hisashi Akiyama
Keyword(s):  
Diesel Engines ◽  
Lubricating Oil ◽  
Oil Consumption ◽  
Piston Skirt

A Study on the Mechanism of Lubricating Oil Consumption of Diesel Engines~The Effect of the Design of Piston Skirt on Lubricating Oil Consumption

2005 ◽  
Author(s):  
Akemi Ito ◽  
Haruhisa Shirakawa ◽  
Masaaki Nakamura ◽  
Kazuyoshi Yoshida ◽  
Hisashi Akiyama
Keyword(s):  
Diesel Engines ◽  
Lubricating Oil ◽  
Oil Consumption ◽  
Piston Skirt

Influence of the Position of Oil Drain Holes of a Piston on Lubricating Oil Consumption

2018 ◽  
Vol 140 (12) ◽  
Author(s):  
Hiroki Hasegawa ◽  
Koji Kikuhara ◽  
Akemi Ito ◽  
Shunsuke Nishijima ◽  
Masatsugu Inui ◽  
...  
Keyword(s):  
Piston Ring ◽  
Gasoline Engine ◽  
Pressure Sensors ◽  
Lubricating Oil ◽  
Oil Consumption ◽  
Tracer Method ◽  
Low Friction ◽  
Piston Skirt ◽  
Generation Mechanisms ◽  
Good Agreement

An increase in lubricating oil consumption in a gasoline engine causes an increase in particulate matters in exhaust gases, poisoning the catalyst after treatment devices, abnormal combustion in a turbo-charged gasoline engine, and so on. Recent trend of low friction of a piston and piston ring tends to increase in lubricating oil consumption. Therefore, reducing oil consumption is required strongly. In this study, the effect of the position of oil drain holes on oil pressure under the oil ring and lubricating oil consumption was investigated. The oil pressure under the oil ring is measured using fiber optic pressure sensors and pressure generation mechanisms were investigated. Lubricating oil consumption was also measured using sulfur tracer method and the effects of oil drain holes hence the oil pressure were evaluated. Four types of arrangement of oil drain holes were tested. The oil pressure variations under the oil ring in the circumferential direction was measured. An increase in oil pressure was found during down-stroke of the piston. The lowest oil pressure was found for the piston with four oil drain holes. Two holes nearby the front/rear end of the piston skirt showed relatively lower pressure. The measured results of oil consumption showed good agreement to measured oil pressure under the oil ring. It was found that oil pressure under the oil ring affected oil consumption, and oil drain holes set near the front/rear end of the piston skirt were effective for reducing oil consumption.

scholarly journals Determination of diesels lubricating oil consumption norms taking into account innovative technology of regeneration on ships

2020 ◽  
Vol 2020 (2) ◽  
pp. 81-91
Author(s):  
Dmitry Konstantinovich Glazyk ◽  
Vladimir Viktorovich Manitsyn ◽  
Rafail Ravilevich Simashov
Keyword(s):  
Diesel Engines ◽  
Operating Time ◽  
Operating Mode ◽  
Nonlinear Dependence ◽  
Lubricating Oil ◽  
Innovative Technology ◽  
Oil Consumption ◽  
Characteristic Mode ◽  
The Cost ◽  
Motor Oils

The article considers the current methods of calculating norms of lubricating oil consumption by marine diesels that provide for three causes of oil loss: oil burning, evaporation rate, and replacement expense. According to the manual, the lubricating oil consumption for replacement is considered only in trunk diesel engines; in main crosshead diesel engines with capacity over 3000 kW it is not considered and not performed. The lubricating oil consumption norms are proposed to carry out in terms of burnout and evaporation, according to the methods of determining fuel consumption norms. To determine consumption norms, it is necessary to know the oil consumption characteristic in relation to the load of the diesels and the load distribution in the ship operating mode. In the low speed crosshead diesel engines the circulating oil is only consumed for evaporation, but the trunk diesel engines consume oil for evaporation, burnout and replacement. The diagram of dependence of the relative cylinder oil consumption on the relative load of the diesel engine in the helical characteristic mode is illustrated. A simplified technological scheme of low-tonnage regeneration of the used motor oils is presented. It is proposed to calculate the oil consumption by the lubrication pump according to a nonlinear dependence based on the speed of the crankshaft at a specific mode. The analysis of the evaporation and burnout is recommended to carry out using a linear relationship, subject to oil consumption in the idle mode. The cost of circulating oil replacement is recommended to calculate according to the diesel operating time. Application of the used lubricating oil regeneration by means of a ship small-sized plant allows to achieve the oil consumption reduction by 19-48% depending on the ship operating mo

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