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Anti-cavitation diesel cylinder liner

A cylinder liner and cylinder technology, applied in the field of cylinder liner, can solve the problems of increasing the maintenance cost and corrosion of the diesel engine.

Inactive Publication Date: 2009-12-16
FEDERAL MOGUL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, alternative technical solutions are needed to solve the problem of cavitation-induced corrosion without significantly increasing the cost of diesel engine overhaul

Method used

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  • Anti-cavitation diesel cylinder liner
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  • Anti-cavitation diesel cylinder liner

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Embodiment Construction

[0021] Referring to the drawings, wherein like reference numerals designate like or corresponding parts in the several figures. The liquid-cooled cylinder module 10 of the internal combustion engine is mainly composed of a crankcase 12 as shown in FIG. 1 . The crankcase 12 is typically cast from iron or aluminum. Crankcase 12 includes a top surface 14 adapted to receive a top gasket (not shown). A cylinder liner 16 is mounted in the crankcase 12 such that when fully assembled, a reciprocating piston (not shown) slides within a generally cylindrical bore 18 and forms part of the combustion chamber. In this combustion chamber the thermal energy of the combustion process is converted into mechanical energy. The purposely reserved space between the cylinder liner 16 and the crankcase 12 forms a coolant channel 20 through which the liquid cooling medium circulates to achieve the purpose of eliminating the heat energy of the cylinder liner 16 . The cylinder liner 16 is formed fro...

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Abstract

The present invention provides a diesel engine wet cylinder liner with surface texture to prevent corrosion caused by cavitation. The surface texture can be formed as a manganese phosphate coating for the outer surface of the cylinder liner in the coolant flow passage of the diesel engine. The manganese phosphate was applied in such a way that a crystalline structure with an average particle size of 2-8 μm, short and strong in nature, well-faceted and free of cauliflower-head-shaped structures formed a discernible network of channels surrounding the crystals. This crystalline structure works with the natural adhesion and surface tension within the liquid coolant to create a stagnant liquid layer on the outer surface of the cylinder liner. This layer of stagnant liquid acts like a self-healing armor plate. When rapid deflection of the cylinder liner creates cavitation bubbles, these bubbles are supported by the stagnant liquid layer away from the outer surface. When these bubbles collapse, their kinetic energy is dissipated in the stagnant liquid layer rather than directly on the outer surface of the cylinder liner. The manganese phosphate coating acts as a seal to stabilize water molecules or engine coolant, thus improving the formation of stagnant liquid layers.

Description

[0001] Related application reference [0002] This application claims priority to US Provisional Application No. 60 / 609,906, filed September 14, 2004. technical field [0003] The invention relates to a cylinder liner of a diesel engine combined with a combustion chamber and a reciprocating piston, in particular to a surface-treated cylinder liner of a diesel engine to overcome damage caused by corrosion caused by cavitation. Background technique [0004] Most heavy-duty diesel engines have wet cylinder liners, which allow coolant to circulate outside the cylinder liners to effectively dissipate heat. These wet cylinder liners are susceptible to failure by a mechanism known as cavitation. [0005] Air pockets are localized areas of low pressure that form along the outer wall of the cylinder liner. This is caused by the high cylinder pressures in the diesel ignition causing cylinder wall deflection. The cylinder walls rapidly expand and then recover during combustion. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/12F01P3/02
Inventor 米格尔·阿塞韦多
Owner FEDERAL MOGUL CORP
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