【作者】

Niclas Liljenfeldt

【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。Active cylinder technology, cylinder deactivation or skip firing has been introduced for different applications for various reasons. The main driver in automotive industry has been to increase the fuel economy, especially on low load operation. Other drivers are emission control and operational benefits. The impact on the noise, vibration and harshness (NVH) has however always been an aspect to take into consideration when an active cylinder technology is introduced. The main drivers to introduce active cylinder technology (ACT) for Wärtsilä gas engines have been to reduce the unburned hydrocarbons as well as to improve the efficiency at part loads. These benefits have been proven by engine tests during the past years. The first successful field tests were made in 2003 on a power plant engine. During the past years, ACT has been developed both for marine applications and power plant applications. In order to make a robust introduction of the function, Wärtsilä is also focusing on the NVH. With a range of engine sizes from 20 cm up to 50 cm bore and cylinder configurations between 6 and 20 cylinders, extensive calculation and testing have been performed in order to find the best cylinder deactivation patterns for all Wärtsilä gas engines. The impact on the design of the base frame and mounting of the engine has been calculated and tested. The impact on the flexible coupling has also been calculated and measured on several engine sizes with different types of flexible couplings at different engine speeds. The measurement setup and the test procedures will be presented in this paper. The paper will present both optimized engine operation and operation patterns with high vibration levels. These results are then compared to standard operation and failure operation modes. Test results will be shown from performed tests on both small and bigger size Wärtsilä engines.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

3

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