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Incompatibility of high-ash oil for engines run on low-sulfur diesel fuel

机译：高灰油在低硫柴油燃料上运行的高灰油

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摘要

This study reports on an investigation to determine the root cause of engine failures that occurred when engines were run on low-sulfur diesel fuel and a high-ash SAE 40 API CD quality synthetic oil. Four WARTSILA SACM DIESEL 4-stroke UD45 V16 engines being used on a power generation application experienced high blowby at relatively low engine hours. In addition, filters were plugging in less than 30 hours of operation. Borescope inspection of the engines revealed heavy deposits on the top of the pistons and scuffed cylinder liners. Upon disassembly, stuck rings were found with heavy deposits also present on the ring lands and inside the top and second ring grooves. A thorough analysis of the engine operating conditions and engine design revealed nothing that would have contributed to the engine failures. Oil analysis showed no unusual trends other than a slight but consistent increase in calcium content. Laboratory testing was done to confirm a hypothesis that the oil selection had contributed to an incompatibility in this application. After replacing the liners, pistons were cleaned and installed with new piston rings. With a nominal 1% ash 15W-40 API CG-4 mineral-based oil installed, the engines were successfully commissioned.
机译：本研究报告了调查，以确定在低硫柴油燃料和高灰SAE 40 API CD质量合成油上运行发动机时发生的发动机故障的根本原因。在发电应用中使用的四个Wartsila SACM柴油4-行程UD45 V16发动机在相对较低的发动机时间内具有高吹气。此外，过滤器在不到30小时的操作中堵塞。 Borescope检查发动机揭示了活塞顶部的重型沉积物和磨碎的缸套。在拆卸时，在环壁上的重沉积物和顶部和第二环槽内也存在卡氏环。对发动机操作条件和发动机设计的彻底分析显示出对发动机故障的任何贡献。除钙含量略微但一致地增加外，石油分析显示出不存在的不寻常趋势。完成实验室测试以确认油选择对本申请不相容的假设。更换衬垫后，清洁活塞并安装了新的活塞环。使用标称1％灰分15W-40 API CG-4安装矿物油，发动机已成功委托。

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