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Research Papers: Internal Combustion Engines

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

[+] Author and Article Information
Hiroki Hasegawa, Shunsuke Nishijima

Department of Mechanical Engineering,
Tokyo City University,
1-28-1 Tamazutsumi,
Setagaya 158-8557, Tokyo, Japan

Koji Kikuhara

Mem. ASME
Graduate School of Environment
and Engineering,
Waseda University,
1011 Nishitomita,
Honjyo-shi 367-0035, Saitama, Japan

Akemi Ito

Mem. ASME
Department of Mechanical Engineering,
Tokyo City University,
1-28-1 Tamazutsumi,
Setagaya 158-8557, Tokyo, Japan
e-mail: aito@tcu.ac.jp

Masatsugu Inui

Nissan Motor Co., Ltd,
560-2 Okatsukoku,
Atsugi-shi 243-0192, Kanagawa, Japan

Hirotaka Akamatsu

Nissan Motor Co., Ltd.,
560-2 Okatsukoku,
Atsugi-shi 243-0192, Kanagawa, Japan

1Corresponding author.

Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received February 26, 2018; final manuscript received March 1, 2018; published online August 13, 2018. Editor: Jerzy T. Sawicki.

J. Eng. Gas Turbines Power 140(12), 122804 (Aug 13, 2018) (7 pages) Paper No: GTP-18-1095; doi: 10.1115/1.4040746 History: Received February 26, 2018; Revised March 01, 2018

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.

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References

Furuhama, S. , and Hiruma, M. , 1972, “Axial Movement of Piston Rings in the Groove,” ASLE, 15(4), pp. 278–287. [CrossRef]
Kikuhara, K. , Ohno, Y. , Ito, A. , Inui, M. , and Akamatsu, H. , 2014, “A Study on the Effect of Third Land Pressure on Lubricating Oil Consumption of a Gasoline Engine,” JSAE Trans., 45(2), pp. 247–252.
Hoult, D. P. , Lux, J. P. , Wong, V. W. , and Billian, S. A. , 1988, “Calibration of Laser Fluorescence Measurements of Lubricant Film Thickness in Engines,” SAE Paper No. 881587.
Ito, A. , Tsuchihashi, K. , and Nakamura, M. , 2007, “A Study on the Mechanism of Lubricating Oil Consumption of Diesel Engines (6th Report),” JSAE Trans., 384(6), pp. 193–198.
Ito, A. , Kikuhara, K. , Nishijima, S. , Hasegawa, H. , and Akamatsu, H. , 2016, “A Study on the Mechanism of Pressure Generating Under the Oil Control Ring of a Piston in an Internal Combustion Engine,” ASME Paper No. ICEF2016-9436.
Mochizuki, K. , Kikuhara, K. , Ito, A. , Inui, M. , and Akamatsu, H. , 2013, “A Study on Oil-Ring Conformability to Cylinder Bore-Development of Measuring Method of Oil-Film Thickness by Using LIF Method,” JSAE Trans., 44(2), pp. 399–404.

Figures

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Fig. 6

Sulfur tracer method

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Fig. 3

Link device for optical fiber

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Fig. 2

Measuring position for oil pressure

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Fig. 1

Schematic of fiber optic pressure sensor

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Fig. 7

Tested piston: (a) tested piston with oil drain holes and (b) tested piston

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Fig. 13

Average of the maximum oil pressure deviated from crank case pressure

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Fig. 8

Typical measurement result of oil pressure under oil control ring [5] (engine speed: 1500 rpm, oil temp.: 80 °C, throttle: full closed throttle)

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Fig. 11

Maximum oil pressure deviated from crank case pressure of each arrangement of oil drain holes

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Fig. 12

The bottom view of the piston and cylinder

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Fig. 15

Reduction rate of oil consumption for the pistons with two oil drain holes against that for the piston with no oil drain holes

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Fig. 14

Effect of the arrangement of oil drain holes on oil consumption

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Fig. 9

Geometrical relationship between piston skirt, oil ring, and thick oil film

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Fig. 10

Effect of the arrangement of oil drain holes on pressure under oil ring (engine speed: 1500 rpm, oil temp.: 50 °C, throttle: full closed throttle)

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