【作者】

Konrad Buczek

【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 continuously increasing mechanical and thermal load of modern engines causes the need to optimize the designs over a wide range of different aspects. The development process of many engine components supported by various computer simulations is currently advanced and well defined, leading to creation of highly optimized products. However, the optimization of such design variables like the firing order, which influences engine operation in several disciplines, is still challenging. In the time of application of high combustion pressures, the layout of the firing order in multi-cylinder commercial engines is an efficient way to reduce cranktrain/overall engine vibration and main bearing loads, whilst controlling engine balancing and preserving adequate gas flow dynamics through the engine intake and exhaust systems. The proposed general firing order selection process of the four-stroke engine and in particular its first part being the optimization of the firing order based on crank train torsional vibration is the main topic of this paper. A central role in this process plays a dedicated algorithm as developed at FEV GmbH, that generates series of firing orders for predefined crankshaft layouts, for which then engine simulations are to be performed. Such approach reduces the number of theoretically possible alternative firing orders only to those that are consistent with the boundary conditions of specific engine design and are technically feasible. The influence of each firing order is finally analyzed and rated by use of multi-criteria optimization techniques such as the proposed desirability index method. Considerations regarding the number of technically feasible alternative firing orders for typical engine configurations and crankshaft layouts being a result of development of above-mentioned algorithm and the study about the influence of the firing order on cranktrain torsional vibration of exemplary V16 commercial diesel engine is presented in this paper as well.

【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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