Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density
The Wankel engine is a rotary type of four-stroke cycle internal combustion engine. The higher specific power output is one of its strong advantages. In Wankel rotary engine, every eccentric shaft revolution corresponds to one four-stroke cycle, whereas conventional reciprocating engine fulfills fou...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/21/4096 |
| _version_ | 1811303255112679424 |
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| author | Osman Akin Kutlar Fatih Malkaz |
| author_facet | Osman Akin Kutlar Fatih Malkaz |
| author_sort | Osman Akin Kutlar |
| collection | DOAJ |
| description | The Wankel engine is a rotary type of four-stroke cycle internal combustion engine. The higher specific power output is one of its strong advantages. In Wankel rotary engine, every eccentric shaft revolution corresponds to one four-stroke cycle, whereas conventional reciprocating engine fulfills four-stroke cycle in two crankshaft revolutions. This means the power stroke frequency is twice that of conventional engines. Theoretically, application of two-stroke cycle on Wankel geometry will duplicate the power stroke frequency. In this research, a single-zone thermodynamic model is developed for studying the performance characteristic of a two-stroke Wankel engine. Two different port timings were adapted from the literature. The results revealed that late opening and early closing port geometry (small opening area) with high supercharging pressure has higher performance at low speed range. However, as the rotor speed increases, the open period of the port area becomes insufficient for the gas exchange, which reduces power performance. Early opening and late closing port geometry (large opening area) with supercharging is more suitable in higher speed range. Port timing and area, charging pressure, and speed are the main factors that characterize output performance. These preliminary results show a potential for increasing power density by applying two-stroke cycle of the Wankel engine. |
| first_indexed | 2024-04-13T07:44:40Z |
| format | Article |
| id | doaj.art-404a0b470aa242bba055a7363d384236 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T07:44:40Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-404a0b470aa242bba055a7363d3842362022-12-22T02:55:44ZengMDPI AGEnergies1996-10732019-10-011221409610.3390/en12214096en12214096Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power DensityOsman Akin Kutlar0Fatih Malkaz1Faculty of Mechanical Engineering, Istanbul Technical University, Istanbul 34437, TurkeyFaculty of Mechanical Engineering, Istanbul Technical University, Istanbul 34437, TurkeyThe Wankel engine is a rotary type of four-stroke cycle internal combustion engine. The higher specific power output is one of its strong advantages. In Wankel rotary engine, every eccentric shaft revolution corresponds to one four-stroke cycle, whereas conventional reciprocating engine fulfills four-stroke cycle in two crankshaft revolutions. This means the power stroke frequency is twice that of conventional engines. Theoretically, application of two-stroke cycle on Wankel geometry will duplicate the power stroke frequency. In this research, a single-zone thermodynamic model is developed for studying the performance characteristic of a two-stroke Wankel engine. Two different port timings were adapted from the literature. The results revealed that late opening and early closing port geometry (small opening area) with high supercharging pressure has higher performance at low speed range. However, as the rotor speed increases, the open period of the port area becomes insufficient for the gas exchange, which reduces power performance. Early opening and late closing port geometry (large opening area) with supercharging is more suitable in higher speed range. Port timing and area, charging pressure, and speed are the main factors that characterize output performance. These preliminary results show a potential for increasing power density by applying two-stroke cycle of the Wankel engine.https://www.mdpi.com/1996-1073/12/21/4096internal combustion enginetwo-strokewankelrotary enginepower stroke densitypower densitysingle-zone model |
| spellingShingle | Osman Akin Kutlar Fatih Malkaz Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density Energies internal combustion engine two-stroke wankel rotary engine power stroke density power density single-zone model |
| title | Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density |
| title_full | Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density |
| title_fullStr | Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density |
| title_full_unstemmed | Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density |
| title_short | Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density |
| title_sort | two stroke wankel type rotary engine a new approach for higher power density |
| topic | internal combustion engine two-stroke wankel rotary engine power stroke density power density single-zone model |
| url | https://www.mdpi.com/1996-1073/12/21/4096 |
| work_keys_str_mv | AT osmanakinkutlar twostrokewankeltyperotaryengineanewapproachforhigherpowerdensity AT fatihmalkaz twostrokewankeltyperotaryengineanewapproachforhigherpowerdensity |