{"title":"Design and experimental testing of a novel skip-cycle mechanism for Wankel engine","authors":"O.A. Kutlar, M. Üngör, Ö. Cihan","doi":"10.1016/j.enconman.2024.119410","DOIUrl":null,"url":null,"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.","PeriodicalId":11664,"journal":{"name":"Energy Conversion and Management","volume":"122 1","pages":""},"PeriodicalIF":9.9000,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy Conversion and Management","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.enconman.2024.119410","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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.
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.