Influence of Used Oil on Piston Ring Friction

Tatsumi Kitahara, Kotaro Fujisak, Hidetsugu Yamamoto

Research output: Contribution to journalArticle

Abstract

The influences of the used oil on the piston ring friction were evaluated by using a pin-on-disk type reciprocative sliding test equipment and an actual operating diesel engine in which the floating liner method was adopted. The major results are: (1) Because the used oil which contains highly concentrated soot is inferior in oil film spreading characteristics, the lubricating property is significantly lowered by reducing the oil supply rate; (2) Even though the kinematic viscosity of the used oil is increased by the flocculation of soot, the effective viscosity on the sliding surface of the used oil is approximately equal to that of the fresh oil due to the de-flocculation of soot. The friction mean effective pressure obtained for the used oil is not different from that for the fresh oil; and (3) Because the oil starved lubrication is dominant for the piston ring pack, the used oil raises the lubrication severity at the beginning of the power stroke, thereby causing the boundary friction to increase.

Original languageEnglish
Pages (from-to)2019-2025
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume67
Issue number658
DOIs
Publication statusPublished - Jan 1 2001

Fingerprint

Piston rings
Friction
Soot
Flocculation
Lubrication
Oils
Viscosity
Diesel engines

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Influence of Used Oil on Piston Ring Friction. / Kitahara, Tatsumi; Fujisak, Kotaro; Yamamoto, Hidetsugu.

In: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, Vol. 67, No. 658, 01.01.2001, p. 2019-2025.

Research output: Contribution to journalArticle

@article{7dfaeb0f653f45d28fe0e4f59dba1d70,
title = "Influence of Used Oil on Piston Ring Friction",
abstract = "The influences of the used oil on the piston ring friction were evaluated by using a pin-on-disk type reciprocative sliding test equipment and an actual operating diesel engine in which the floating liner method was adopted. The major results are: (1) Because the used oil which contains highly concentrated soot is inferior in oil film spreading characteristics, the lubricating property is significantly lowered by reducing the oil supply rate; (2) Even though the kinematic viscosity of the used oil is increased by the flocculation of soot, the effective viscosity on the sliding surface of the used oil is approximately equal to that of the fresh oil due to the de-flocculation of soot. The friction mean effective pressure obtained for the used oil is not different from that for the fresh oil; and (3) Because the oil starved lubrication is dominant for the piston ring pack, the used oil raises the lubrication severity at the beginning of the power stroke, thereby causing the boundary friction to increase.",
author = "Tatsumi Kitahara and Kotaro Fujisak and Hidetsugu Yamamoto",
year = "2001",
month = "1",
day = "1",
doi = "10.1299/kikaic.67.2019",
language = "English",
volume = "67",
pages = "2019--2025",
journal = "Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C",
issn = "0387-5024",
publisher = "The Japan Society of Mechanical Engineers",
number = "658",

}

TY - JOUR

T1 - Influence of Used Oil on Piston Ring Friction

AU - Kitahara, Tatsumi

AU - Fujisak, Kotaro

AU - Yamamoto, Hidetsugu

PY - 2001/1/1

Y1 - 2001/1/1

N2 - The influences of the used oil on the piston ring friction were evaluated by using a pin-on-disk type reciprocative sliding test equipment and an actual operating diesel engine in which the floating liner method was adopted. The major results are: (1) Because the used oil which contains highly concentrated soot is inferior in oil film spreading characteristics, the lubricating property is significantly lowered by reducing the oil supply rate; (2) Even though the kinematic viscosity of the used oil is increased by the flocculation of soot, the effective viscosity on the sliding surface of the used oil is approximately equal to that of the fresh oil due to the de-flocculation of soot. The friction mean effective pressure obtained for the used oil is not different from that for the fresh oil; and (3) Because the oil starved lubrication is dominant for the piston ring pack, the used oil raises the lubrication severity at the beginning of the power stroke, thereby causing the boundary friction to increase.

AB - The influences of the used oil on the piston ring friction were evaluated by using a pin-on-disk type reciprocative sliding test equipment and an actual operating diesel engine in which the floating liner method was adopted. The major results are: (1) Because the used oil which contains highly concentrated soot is inferior in oil film spreading characteristics, the lubricating property is significantly lowered by reducing the oil supply rate; (2) Even though the kinematic viscosity of the used oil is increased by the flocculation of soot, the effective viscosity on the sliding surface of the used oil is approximately equal to that of the fresh oil due to the de-flocculation of soot. The friction mean effective pressure obtained for the used oil is not different from that for the fresh oil; and (3) Because the oil starved lubrication is dominant for the piston ring pack, the used oil raises the lubrication severity at the beginning of the power stroke, thereby causing the boundary friction to increase.

UR - http://www.scopus.com/inward/record.url?scp=85024447792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85024447792&partnerID=8YFLogxK

U2 - 10.1299/kikaic.67.2019

DO - 10.1299/kikaic.67.2019

M3 - Article

AN - SCOPUS:85024447792

VL - 67

SP - 2019

EP - 2025

JO - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

JF - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

SN - 0387-5024

IS - 658

ER -