Factors Influencing Engine Oil Consumption in Today's Automotive Engines

1989 ◽  
Author(s):  
Lenard R. Carey ◽  
Denis C. Roberts ◽  
Harold Shaub
Keyword(s):  
Engine Oil ◽  
Oil Consumption ◽  
Automotive Engines ◽  
Factors Influencing

Experimental Investigation of Oil Accumulation in Second Land of Internal Combustion Engines

2005 ◽  
Vol 127 (1) ◽  
pp. 206-212
Author(s):  
T. Icoz ◽  
Z. Dursunkaya
Keyword(s):  
Film Thickness ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Oil Consumption ◽  
Oil Accumulation ◽  
Oil Film ◽  
Piston Cylinder ◽  
Total Oil

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.

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

2012 ◽  
Vol 134 (7) ◽  
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.

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

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

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

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

Diesel Engine Oil Consumption Depending on Piston Ring Motion and Design

1993 ◽  
Author(s):  
Hideki Yoshida ◽  
Masaki Yamada ◽  
Hiroyuki Kobayashi
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Engine Oil ◽  
Oil Consumption

Oil-Consumption Measurements of Individual Cylinders in Automotive Engines

1970 ◽  
Author(s):  
W. J. Mayer ◽  
D. P. Krause ◽  
C. P. Moore ◽  
C. B. Murphy
Keyword(s):  
Oil Consumption ◽  
Automotive Engines

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

2003 ◽  
Vol 125 (4) ◽  
pp. 1081-1089 ◽  
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.

A Study on the Effect of Pressure Balance Between the Second and Third Land of a Piston on Engine Oil Consumption

2014 ◽  
Author(s):  
Yohei Ohno ◽  
Koji Kikuhara ◽  
Akemi Ito ◽  
Masatsugu Inui ◽  
Hirotaka Akamatsu
Keyword(s):  
Gasoline Engine ◽  
Fiber Type ◽  
Engine Oil ◽  
Design Stage ◽  
Oil Consumption ◽  
Pressure Balance ◽  
The Third ◽  
Running Cost ◽  
Land Pressure ◽  
Type Pressure

Engine oil consumption causes particulate matter, poisoning of catalysts, abnormal combustion like pre-ignition in a gasoline engine, and an increase in customer’s running cost. Oil consumption, therefore, must be reduced. It is well known that pressure at a piston second land sometimes becomes larger than the cylinder pressure in the latter half of the expansion stroke. Larger pressure at the second land causes an increase in engine oil consumption. For reducing the second land pressure, increasing volume of a piston second land is one of design schemes. Pressure at a piston second land is calculated in piston design stage. In the calculation, pressure at a piston third land is assumed as same as pressure at the crankcase. This study aimed the effect of volume of the third land of a piston on engine oil consumption. The third and the second lands pressure were measured using an optical fiber type pressure sensor. It was found that the third land pressure showed a quite different trend from the crankcase pressure. It was also found that the pressure balance between the second land and the third land affected engine oil consumption. It was suggested that the third land pressure should be considered in the calculation for lands pressure of a piston and further investigation on third land design for reducing engine oil consumption may be required.

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