【作者】

Eike Joachim Sixel

【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。The development time for new engines is getting shorter and tests are, in case of large bore medium speed engines, very expensive. An accurate assessment of the expected engine performance is required at an early stage of a project. Cylinder pressure traces and the main mass flows are required to support the engine design. The general setup, mass flows and pressure requirements are necessary to define the auxiliary systems and the turbo charger. And last but not least the fuel consumption is important to support the sales activities. Information about the restrictions concerning ambient conditions such as altitude, temperature and gas quality are required in a later stage as well. It is impossible to measure all of these values even with detailed single cylinder tests in advance. To deliver the information a detailed and reliable simulation model of the engine is required without or with only a few measured values for the validation. 1-D-simulation tools like GT-Power are well known and effective tools to predict the performance of a combustion engine. Without an empirical combustion model at least it is not possible to set up the model prior to measurements. A fully integrated physical Diesel-Gas combustion model for GT-Power is available at Caterpillar and will be presented in this paper. The Model is validated with a broad range of single cylinder measurements. It shows a very good correlation for the required range of Air/Fuel-Ratios, start of injection (SOI), ignition fuel quantities and gas qualities. The influence of engine speed and load is covered and a validation with different engine sizes was successful. The physical combustion model is a co-development of Hiltner Combustion Systems (HCS) and Caterpillar. Models are available for the combustion in liquid fuel ignited Diesel-Gas and spark ignited pre chamber and open chamber Otto-Gas engines. The topic of this presentation is the Diesel-Gas engine combustion model and the use during the development of the M46DF. An outlook for future projects, like a possible power upgrade and the use of alternative fuels as Methanol and associated gas will be given at the end of the presentation. It was possible to support the development of the recent engine families at Caterpillar Motoren Kiel.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

5

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