Design and experimental testing of a novel skip-cycle mechanism for Wankel engine

IF 9.9 1区 工程技术 Q1 ENERGY & FUELS
O.A. Kutlar, M. Üngör, Ö. Cihan
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引用次数: 0

Abstract

In this study a new skip-cycle mechanism which will be applied to the Wankel engine have been designed, analyzed and tested. With skip-cycle method application, after the four periods of power generation are completed, no more work is produced in the following cycle. To achieve this, the fuel and ignition are cut off during the cycle when power is not generated. Additionally, in this cycle the intake port is also closed. The aim of this application is to change the effective stroke volume of the engine according to load conditions thus reducing the pumping loss and increasing efficiency. Alternative mechanisms have been designed, analyzed and one of them with minimal modification is tested on the single rotor Mazda 13B test engine. In the designed system of skip-cycle, it has been intended to stop the intake operation with the aid of a rotary valve placed in the intake port thus providing cycle control. A correlation between the moving parts on the engine has been developed with the inclusion of the valve into the mechanism. Valve window angle, valve orientation and valve window geometry parameters were evaluated. The skip-cycle mechanism was installed in the test engine and measured data of the skip-cycle and normal cycle were compared. The result show that the Wankel engine with skip-cycle mechanism runs at low load conditions with higher pressure during combustion period and lower vacuum pressure at intake period compared at equal power generation at normal cycle conditions.
一种新型万克尔发动机跳循环机构的设计与试验
本文设计、分析和试验了一种应用于万克尔发动机的新型跳循环机构。采用跳循环法,四个周期发电完成后,下一个周期不再产生功。为了达到这个目的,在不产生动力的循环过程中,燃料和点火被切断。此外,在这个循环中,进气口也是关闭的。该应用程序的目的是根据负载条件改变发动机的有效冲程量,从而减少泵送损失并提高效率。对备选机构进行了设计和分析,并在单转子马自达13B试验发动机上对其中一种修改最小的机构进行了试验。在设计的跳过循环系统中,它旨在通过放置在进气口的旋转阀的帮助来停止进气操作,从而提供循环控制。发动机上运动部件之间的相关性随着气门的加入而发展起来。评估了阀窗角、阀窗方位和阀窗几何参数。在试验发动机上安装了跳循环机构,并对跳循环和正常循环的测量数据进行了比较。结果表明,与正常循环等功率工况相比,采用跳循环机构的万克尔发动机在燃烧期压力较高、进气期真空压力较低的低负荷工况下运行。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Energy Conversion and Management
Energy Conversion and Management 工程技术-力学
CiteScore
19.00
自引率
11.50%
发文量
1304
审稿时长
17 days
期刊介绍: The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.
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