Engine Oil Development for Preventing Pre-Ignition in Turbocharged Gasoline Engine

2014 ◽  
Vol 7 (3) ◽  
pp. 869-874 ◽  
Author(s):  
Kosuke Fujimoto ◽  
Minoru Yamashita ◽  
Satoshi Hirano ◽  
Katsuyoshi Kato ◽  
Izumi Watanabe ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Engine Oil ◽  
Oil Development

Natural Gas Engine Oil Development

1991 ◽  
Author(s):  
Mónica Graciela Vázquez ◽  
Patricia Errecalde ◽  
Sergio Fabián Seín ◽  
Daniel Gonzalez
Keyword(s):  
Natural Gas ◽  
Engine Oil ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Oil Development

Development of ILSAC GF-5 0W-20 Fuel Economy Gasoline Engine Oil

2012 ◽  
Author(s):  
Kosuke Fujimoto ◽  
Minoru Yamashita ◽  
Toyoharu Kaneko ◽  
Satoshi Hirano ◽  
Yusuke Ito ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Gasoline Engine ◽  
Engine Oil

A field test method to quantitatively determine oxidation stability of gasoline engine oil

2017 ◽  
Vol 30 (2) ◽  
pp. 57-64 ◽  
Author(s):  
Lei Wei ◽  
Haitao Duan ◽  
Song Chen ◽  
Dan Jia ◽  
Xuzheng Qian ◽  
...  
Keyword(s):  
Field Test ◽  
Gasoline Engine ◽  
Oxidation Stability ◽  
Test Method ◽  
Engine Oil ◽  
Field Test Method

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.

Gasoline Engine Oil Specifications, Past, Present and Global

2009 ◽  
Author(s):  
Eric R. Johnson ◽  
Robert M. Olree ◽  
Michael L. McMillan ◽  
Sidney L. Clark
Keyword(s):  
Gasoline Engine ◽  
Engine Oil
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