An Experimental Study of Oil Consumption in Gasoline Engines

1992 ◽  
Author(s):  
M. Manni ◽  
G. Ciocci
Keyword(s):  
Experimental Study ◽  
Oil Consumption ◽  
Gasoline Engines

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.

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

Low Friction Ring Pack for Gasoline Engines

2006 ◽  
Author(s):  
Eduardo Tomanik ◽  
Andre Ferrarese
Keyword(s):  
Ring Width ◽  
Friction Reduction ◽  
Main Concern ◽  
Oil Consumption ◽  
Low Friction ◽  
Tangential Load ◽  
Gasoline Engines ◽  
Operational Conditions ◽  
Fuel Savings ◽  
Ring Pack

Lower emissions, reduced friction and low lubricant oil consumption are the main drivers for new gasoline engines. In terms of piston ring pack, the trend is to reduce ring tangential load and width. On the other hand, the main concern is to have proper ring conformability and lube oil control. This work presents the comparison of a baseline ring pack with a low friction pack in terms of friction, blow-by control and lube oil consumption. Besides ring width and tangential load reductions, evaluations of ring materials are also carried out. Narrow compression rings, 1.0 and 0.8 mm, were engine tested. PVD top ring was also tested and showed about 10% friction reduction compared to the usual Gas Nitrided one. 3-piece 1.5 mm oil rings were compared with the usual 2.0 mm ones. Being more flexible, the narrower oil rings can have same conformability with reduced tangential load. Friction was measured in the mono-cylinder SI Floating Liner engine at 5 operational conditions. Effect of cylinder roughness on friction is discussed by reciprocating bench tests. Compared with a typical 1.2/1.2/2.0 mm SI ring pack, the proposed 1.0/1.0/1.5 mm pack brought about 28% reduction in ring friction in the tested conditions, which would mean in about 1% of fuel savings in urban use.

An Experimental Study of the Effect of Cylinder Bore Finish on Engine Oil Consumption

1995 ◽  
Author(s):  
Stephen H. Hill ◽  
Troy C. Kantola ◽  
James R. Brown ◽  
Joseph C. Hamelink
Keyword(s):  
Experimental Study ◽  
Engine Oil ◽  
Oil Consumption ◽  
Cylinder Bore

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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