Analisa Pengukuran Cylinder Liner dan Piston pada Overhoul Diesel Engine

Internal combustion engines consume about 90% of fuel refined from crude oil which supplies 30% of the annual global flow of energy. Heavy-duty diesel engines are the primary source of power used in highways, marine, railroads, and power stations. The right coating can improve the tribological properties of cylinder liners and increase the mechanical efficiency of an engine. Also, it can help to extend the maintenance periods, and enhance the reliability of the vehicles. In this research, tribological and economic evaluations were performed for coated and uncoated substrates from a cylinder liner of a heavy-duty diesel engine, aiming to lower friction, wear rate, and maintenance cost. A reciprocating friction test was conducted under dry condition using Wolfram carbide (tungsten carbide) ball applied a 10 N normal load on a ball on disk geometry. The cylinder liner was made of gray cast iron, and the substrates obtained were coated with three different coating materials (Cr3C2/NiCr, NiCr, and Al2O3/TiO2) through the thermal spray and high-velocity oxy-fuel coating process. Tribological evaluations showed that the substrates coded with Al2O3/TiO2 and Cr3C2/NiCr had the lowest friction coefficient and wear rate. The most economical coating was Al2O3/TiO2, being able to supply about 61% lower coefficient of friction and 94% less wear rate relative to the uncoated sample, for the price of one-third of the Cr3C2/NiCr coating and one half of a new gray cast iron cylinder liner.

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Failure Analysis of Early Fracture for Diesel Engine Cylinder Liner

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.461.177 ◽

2012 ◽

Vol 461 ◽

pp. 177-181

Author(s):

Jun Gu ◽

Yuan Qiang Xu ◽

Jing Jing Zhou

Keyword(s):

Diesel Engine ◽

Failure Analysis ◽

Early Time ◽

Cylinder Liner ◽

Acute Angle ◽

Engine Cylinder ◽

Regulatory Measures ◽

Engine Cylinder Liner

This article, through the cylinder jacket break phenomenon which occurs to the diesel engine early time carries on the failure analysis, suggests that the cylinder jacket material ingredient control is lax, causes the cylinder jacket material brittleness to be oversized, the tool escape acute angle is the cylinder jacket break primary cause, and proposes corresponding regulatory measures prevent the cylinder jacket early tithe break.

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Finite Element Analysis and Optimization of S1110 Diesel Engine Body

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.268-270.837 ◽

2012 ◽

Vol 268-270 ◽

pp. 837-840

Author(s):

Sen Zhao ◽

Xiao Hui Cao

Keyword(s):

Finite Element ◽

Diesel Engine ◽

Cylinder Liner ◽

The Body ◽

Mass Ratio ◽

Cast Aluminum ◽

Optimization Scheme ◽

Element Analysis ◽

Stiffness Analysis ◽

Structural Intensity

In order to reduce the mass ratio of S1110 diesel engine, structural intensity and stiffness analysis are performed on the assembly parts of engine body by using the finite element method. Through comparative analysis of more than one calculation scheme, optimization scheme has been got. To ensure the intensity and stiffness of the engine body is not reduced under the premise, optimization scheme makes the body mass greatly reduced from the original engine body’s 38kg to 13.8kg and the engine mass ratio is reduced from 13.2kg/kW to 11.81kg/kW. The results show that, changing the body material from cast iron materials to cast aluminum materials, the body stress distribution trends are similar, but the cast aluminum body deformation increases; increasing the number of cylinder head bolts to 6 can reduce the deformation of the cylinder liner; a reasonable set of stiffeners can reduce the bearing bore deformation.

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A Study on Cylinder Bore Deformation of a Diesel Engine With Dry Liner Structure

Volume 3: Engine Systems: Lubrication, Wear, Components, System Dynamics, and Design ◽

10.1115/ices2001-128 ◽

2001 ◽

Cited By ~ 1

Author(s):

Shigeto Yamamoto ◽

Hiroshi Sakita ◽

Masaaki Takiguchi ◽

Shinichi Sasaki

Keyword(s):

Thermal Expansion ◽

Diesel Engine ◽

Room Temperature ◽

Engine Speed ◽

Cylinder Liner ◽

Cylinder Block ◽

Cylinder Pressure ◽

Engine Operation ◽

Actual Operation ◽

Cylinder Bore

Abstract The deformation of the cylinder liner of a diesel engine in actual operation have been measured by the means of a rotary piston, and the deformation has been compared with those measured statically at room temperature. As a result, it is found that the deformation of the liner in engine operation is hardly affected by the deformation at room temperature, but it follows the deformation of the cylinder block where the liner is inserted. It is also found as follows: The deformation of the liner upper portion varies according to the head bolts and the engine load, while the effect of the cylinder pressure is insignificant. The deformation at the middle of the liner changes mainly by the thermal expansion in the thrust direction, while the deformation at the lower portion is not affected by the engine speed or the load.

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The Starved Lubrication of Piston Rings in a Diesel Engine

Journal of Mechanical Engineering Science ◽

10.1243/jmes_jour_1978_020_060_02 ◽

1978 ◽

Vol 20 (6) ◽

pp. 345-352 ◽

Cited By ~ 38

Author(s):

S. L. Moore ◽

G. M. Hamilton

Keyword(s):

Diesel Engine ◽

Film Thickness ◽

Cylinder Liner ◽

Piston Rings ◽

Starved Lubrication

Miniature pressure and film thickness transducers mounted in the cylinder liner of a diesel engine have been used to study the lubrication of piston rings. The method of using the gauges to determine oil starvation in the inlet of the rings is described and results from a working engine are presented. Calculations for both starved and fully flooded rings have been carried out and are compared with the measured results.

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