Oil Consumption Sources in a Modern Gasoline Engine Including Contribution of Blow-by Separator and Turbocharger: An Experimental Study Based on the Use of Radiotracers

2010 ◽  
Vol 3 (2) ◽  
pp. 916-924 ◽  
Author(s):  
Thierry Delvigne
Keyword(s):  
Experimental Study ◽  
Gasoline Engine ◽  
Oil Consumption

An Experimental Study on Relationship between Lubricating Oil Consumption and Cylinder Bore Deformation in Conventional Gasoline Engine

2009 ◽  
Vol 2 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Naoki Iijima ◽  
Takeo Sakurai ◽  
Masaaki Takiguchi ◽  
Yasuo Harigaya ◽  
Takeshi Yamada ◽  
...  
Keyword(s):  
Experimental Study ◽  
Gasoline Engine ◽  
Lubricating Oil ◽  
Oil Consumption ◽  
Cylinder Bore

scholarly journals Experimental Study on the Valve Gap in the Gasoline Engine

2019 ◽  
Vol 256 ◽  
pp. 02011
Author(s):  
Fan Dong ◽  
Chong Lei ◽  
Xiao Yu Yang ◽  
Shao Feng Wang ◽  
Cong Ruan
Keyword(s):  
Experimental Study ◽  
Heat Release ◽  
Significant Influence ◽  
Normal State ◽  
Cylinder Head ◽  
Gasoline Engine ◽  
The Other ◽  
Gasoline Engines ◽  
Timing System

The influences of the installations of the camshaft support, and timing system and the heat release on the valve gap of the gasoline engine were analyzed in the present. The experiments were carried out on 50 4-cylinder 4-stroke gasoline engines, and the results indicate that to tighten the camshaft support has a great impact on valve gap, the indicated mean there was an obvious deformation in cylinder head after the camshaft support was tightened. The timing system also has a significant influence on the valve gap because it produces a downward force to the camshaft, leading to a smaller valve gap near the timing system and a bigger valve gap on the other side. It was also found that with the increase of temperature the valve gap was 0.1 mm larger than that in the normal state.

scholarly journals An Experimental Study on Combustion and Emission Analysis of Four Cylinder 4-Stroke Gasoline Engine Using Pure Hydrogen and LPG at Idle Condition

2016 ◽  
Vol 90 ◽  
pp. 525-534 ◽  
Author(s):  
P.R. Chitragar ◽  
K.V. Shivaprasad ◽  
Vighnesh Nayak ◽  
P. Bedar ◽  
G.N. Kumar
Keyword(s):  
Experimental Study ◽  
Gasoline Engine ◽  
Pure Hydrogen ◽  
Emission Analysis

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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