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首页> 外文会议>Fall technical conference of the ASME international combustion engine division >Low cost plasmaspray coating as an alternative to cast iron cylinder liner in aluminum engines
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Low cost plasmaspray coating as an alternative to cast iron cylinder liner in aluminum engines

机译：低成本等离子喷涂涂料可替代铝发动机中的铸铁气缸套

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摘要

Material preparation and plasmaspray process for a very low cost Fe - FeO - Fe_3C coating (designated M1-P) for aluminum engine cylinder bore (parent bore and inserted aluminum liner) application are described. Friction data obtained at 100, 300, 500 and 700 rpm, for oil viscosities of 25 cp and 105 cp are compared with reference cast iron liners of plateau-hone 0.3 #mu#m Ra surface finish. Average friction coefficient data show significantly lower average friction coefficients for M1-P relative to reference CI. This is attributed to a rapid transformation to the hydrodynamic friction mode, at around 35 deg -55 deg crank angle ATDC, due to the presence of uniformly distributed porosity. The latter retains oil and promotes stable oil film, even under adverse loading conditions, leading to significantly lower cycle average friction. Vehicle evaluation on limited 16,000 mile durability test showed significant vehicle fuel economy benefit.
机译：描述了用于铝发动机汽缸孔（母孔和插入式铝衬套）的非常低成本的Fe-FeO-Fe_3C涂层（指定为M1-P）的材料制备和等离子喷涂工艺。将在100、300、500和700 rpm下分别获得的油粘度分别为25 cp和105 cp的摩擦数据与高原地区0.3＃mu＃m Ra表面粗糙度的参考铸铁衬套进行了比较。平均摩擦系数数据显示，相对于参考CI，M1-P的平均摩擦系数明显较低。这归因于由于均匀分布的孔隙率的存在，在大约35度-55度曲柄角ATDC处向流体动力摩擦模式的快速转变。即使在不利的负载条件下，后者也能保持机油并促进油膜稳定，从而显着降低循环平均摩擦力。在有限的16,000英里耐久性测试中，车辆评估显示出显着的车辆燃油经济性收益。

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