【作者】

Jose Luis Garcia Ojeda,Jerry Hammett

【摘要】

论文已在中国上海举行的第27届CIMAC大会上发表。论文的版权归CIMAC所有。In recent years, legislative changes and financial pressures have driven ship owners and oper-ators to adopt new operational strategies; as a consequence, operational flexibility in terms of main engine loading and fuel choice has become not only a need, but a proven solution used to address environmentaland economic performance needs of the marine transportation sector(particularly in the container vessel segment). In this context,a broader operational win-dow for modern low speed 2-stroke marine diesel en-gines has introduced new challenges that need to be considered in cylinder lubrication and have highlighted new performance required of the cylinder lubricant in order for it to deal more effectively with these changes. The influence of a highly variable operational profile results in a cylinder lubricant being exposed to stress levels that until now, it has not been optimally designed for. This paper provides a summary of new investigations into low speed 2-stroke cylinder oil stress under a broad range of operational conditions anpresentsthese findings as the basis for the design of a wide range cylinder lubricant that is able to outperform traditional 70 BN cylinder lubricants across a highly flexible operational profile in terms of fuel choice, ambient conditions and engine loading. As part of the development process of a wide-range cylinder lubricant, the paper will discuss some aspects of how a fundamental understanding of oil stress in the low speed 2stroke diesel engine has significantly increased the importance and relevance of using a laboratory engine.Recent developments of new test protocols and engine control systems of the Bolnes 3(1) DNL 170/600 laboratory engine will be discussed and highlighted, to show how it can be used to generate reliable andrepeatable test data for the process of discovering and benchmarking candidate formulations, thus proving their robustness and readiness for testing in the field in a full size engine that is capable of discriminating the performance of a lubricant. In particular this paper will discuss the increasing relevance of using such testing as a means of challenging traditional approaches to base number and performance relationships. Finaly, the paper will show summarized results of more than 30,000 accumulated running hours with Alexia S4 on a number of engine types, sizes, ages and operational profiles, referenced against previous coventional 70 TBN cylinder lubricants.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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