【作者】

Jaana Tamminen

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC大会上发表，论文的版权归CIMAC所有。Challenges are good promoters for technology development. Luckily, there have been and will be driving development objectives related to four-stroke engines to keep innovative brains busy, like emission compliance with current and future legislation, higher efficiency and power density, fuel flexibility, better low and part load performance, fast starting and loading capability, as well as good serviceability with prolonged maintenance intervals. The large amount of “must haves” and value adding features of the new high-efficient Wärtsilä 31 medium-speed engine family are based on new technologies as well as on combination of different technologies. To implement new technologies and to combine several different technologies in a new way demands an extensive and effective R&D process. This in order to ensure eligible functionality and reliability of the components and technologies, and in the final end, high quality of the engine as a whole. This paper describes the R&D process for the Wärtsilä 31 engine family, including steps from the collection of experience from former engines, through simulations – component and technology bench testing (rig testing) – singlecylinder engine testing, over to multi-cylinder engine testing. A front-loaded R&D process aims at finalising the development work of all main components and technologies as well as the engine performance values as far as possible before the first proto engine. By pretesting and validation, the main “children´s diseases” can be cured and full-scale multi-cylinder engine testing can start from a more mature technology level. This provides a possibility to focus on fine-tuning and final validation on the actual engine. Wärtsilä 31 pre-testing and validation of components and technologies (e.g. fuel injection system, variable valve train, etc.) on dedicated test rigs sum up to several tens of thousands of testing hours. Engine performance development by simulations and CFD calculations are verified in single-cylinder engines. The result of early-state testing and validation has enabled corrective design modifications and fact-based technology choices that were implemented already to the first proto engine.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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