High Pressure Fuel Pump for Gasoline Direct Injection based on Ceramic Components
High Pressure Fuel Pump for Gasoline Direct Injection based on Ceramic Components
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DOI：
10.4271/2005-01-2103
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
J. P. Häntsche;G. Krause;A. Velji;U. Spicher
中科院分区：
文献类型：
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作者：
J. P. Häntsche;G. Krause;A. Velji;U. Spicher
现代直喷式火花点火发动机（disi发动机）要求提高燃油喷射压力以加速混合气的制备。其中燃油泵是必不可少的部件。非常规材料具有实现高压和低磨损、低摩擦的巨大潜力。为了评估陶瓷材料和钢作为滑动部件的不同组合的使用，开发了一个示例性高压燃油泵。力和摩擦系数可以作为滑动接触中曲柄角的函数来检索。对气缸与活塞间隙的泄漏进行了分析，并建立了分析模型。对于不同的材料和燃料组合，给出了间隙、冲程频率和表面粗糙度对力和摩擦系数的重要影响。
Modern direct injection spark ignition engines (DISI-engines) require increasing fuel-injection-pressures in order to accelerate mixture preparation. Therein the fuel-pump is an essential component. Non-conventional materials offer a high potential to realize high pressure combined with low wear and friction. An exemplary high pressure fuel pump was developed in order to evaluate the use of different combinations of ceramic materials and steel as sliding parts. Forces and friction coefficients can be retrieved as a function of the crank angle in the sliding contacts. The leakage in the gap between cylinder and piston was analyzed and an analytical model was developed. Important effects of clearance, stroke frequency and surface roughness on forces and friction coefficients are presented for different combinations of materials and fuels.