Effects of Engine Oil Composition on Oil Consumption

Blowback of engine oil suspended in combustion gases, when the gas flows from the piston second land back into the combustion chamber, is believed to contribute to oil consumption and hydrocarbon emissions in internal combustion engines. Oil accumulation in the region between top and second compression rings is a factor that influences this phenomenon. The effects of individual parameters, such as oil film thickness and viscosity, however, have still not been understood. The present study was aimed at constructing an experimental setup to study the effect of oil film thickness on oil accumulation in the second land of internal combustion engines. Due to the inherent difficulties of experimentation on production engines, a modeled piston-cylinder assembly was constructed. Total oil accumulation in the modeled second land after a single piston stroke was measured and compared to oil consumption in operating engines.

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Exhaust Emissions Characterization of a Turbocharged 2-Stroke Tier 0+ Locomotive Engine: NOx, Particulate Matter and Soluble Organic Fraction Composition

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4006006 ◽

2012 ◽

Vol 134 (7) ◽

Cited By ~ 4

Author(s):

Stanislav V. Bohac ◽

Eric Feiler ◽

Ian Bradbury

Keyword(s):

Particulate Matter ◽

Elemental Carbon ◽

Engine Oil ◽

Exhaust Emission ◽

Moderate Increase ◽

Oil Consumption ◽

Engine Operation ◽

Soluble Organic Fraction ◽

Insoluble Portion

This study presents a detailed exhaust emission characterization of a 2-Stroke turbocharged line haul locomotive diesel engine fitted with an early-development Tier 0 + emissions kit. The objective of this work is to use emissions characterization to gain insight into engine operation and mechanisms of pollutant formation for this family of engine, and identify areas of potential future engine emissions improvement. Results show that at the notches tested (notches 3–8) the largest contributor to particulate matter (PM)mass is insolubles (mostly elemental carbon), but that the soluble component of PM, comprising 14–32% of PM, is also significant. Gas chromatography (GC) analysis of the soluble portion shows that it is composed of 55–77% oil-like C22–C30+ hydrocarbons, with the remainder being fuel-like C9–C21 hydrocarbons. The emissions characterization suggests that advancing combustion timing should be effective in reducing PM mass by reducing the insoluble portion (elemental carbon) of PM at all notches. NOx will likely increase, but the current level of NOx is sufficiently below Tier 0+ limits to allow a moderate increase. Reducing engine oil consumption should also reduce PM mass at all notches, although to a smaller degree than measures that reduce the insoluble portion of PM.

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Development of JASO GLV-1 0W-8 Low Viscosity Engine Oil for Improving Fuel Efficiency considering Oil Consumption and Engine Wear Performance

10.4271/2020-01-1423 ◽

2020 ◽

Author(s):

Sachiko Okuda ◽

Hiroki Saito ◽

Seiichi Nakano ◽

Yusuke Koike ◽

Takumaru Sagawa ◽

...

Keyword(s):

Fuel Efficiency ◽

Engine Oil ◽

Oil Consumption ◽

Wear Performance ◽

Low Viscosity ◽

Engine Wear

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Numerical simulation of gas-liquid two phase flow for prediction of engine oil consumption

The Proceedings of The Computational Mechanics Conference ◽

10.1299/jsmecmd.2017.30.252 ◽

2017 ◽

Vol 2017.30 (0) ◽

pp. 252

Author(s):

Ryuichi SASAKI ◽

Yuki KAWAMOTO ◽

Yuta AKAMA ◽

Shun TAKAHASHI ◽

Masayuki OCHIAI ◽

...

Keyword(s):

Numerical Simulation ◽

Two Phase Flow ◽

Engine Oil ◽

Phase Flow ◽

Oil Consumption ◽

Two Phase

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Diesel Engine Oil Consumption Depending on Piston Ring Motion and Design

10.4271/930995 ◽

1993 ◽

Cited By ~ 4

Author(s):

Hideki Yoshida ◽

Masaki Yamada ◽

Hiroyuki Kobayashi

Keyword(s):

Diesel Engine ◽

Piston Ring ◽

Engine Oil ◽

Oil Consumption

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A Survey of the Mechanical Design Factors Affecting Engine Oil Consumption

10.4271/790864 ◽

1979 ◽

Cited By ~ 15

Author(s):

J. A. Mcgeehan

Keyword(s):

Mechanical Design ◽

Engine Oil ◽

Oil Consumption ◽

Factors Affecting ◽

Design Factors

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Numerical Investigation of the Effects of Axial Cylinder Bore Profiles on Piston Ring Radial Dynamics

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1610016 ◽

2003 ◽

Vol 125 (4) ◽

pp. 1081-1089 ◽

Cited By ~ 13

Author(s):

Y. Piao ◽

S. D. Gulwadi

Keyword(s):

High Speed ◽

Piston Ring ◽

Gasoline Engine ◽

Engine Performance ◽

Operating Conditions ◽

Engine Oil ◽

Oil Consumption ◽

Ring Pack ◽

Cylinder Bore

The role of cylinder bore shapes in engine performance has been the subject of several studies in recent years. In particular, the influence of bore distortion on oil consumption under high speed conditions has generated significant interest. In this paper, the effect of an axial bore profile on radial dynamics of a ring is investigated. Radial ring motions within grooves due to the axial bore profile can generate significant inertial effects and also have an impact on ring end-gap sizes and lubrication conditions at the ring-liner interfaces. The magnitude of such effects is dependent on the ring-pack configuration, engine operating conditions (speed and load) and axial bore profile details. These issues are investigated in this study due to their implication on engine oil consumption, friction and blow-by. The authors have developed an analytical expression to account for the effects of radial ring inertia due to an axial bore profile for implementation in a piston ring-pack simulation tool RINGPAK. Simulation results from a gasoline engine study are presented to illustrate the effects of engine speeds, ring tensions, and characteristics of axial bore profiles on ring radial dynamics and ring-liner lubrication. Relevant qualitative comparisons are made to experimental measurements available in the literature.

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