Various designs of the two-stroke engine heads with the valve flushed system

• Autorzy: Łoza Ł. , Kaźmierczak A. , Borkowska J. , Skorupa P. , Krakowian K. , Cienciała M.

Identyfikatory

DOI

10.5604/12314005.1168471

• Języki publikacji: EN

Abstrakty

EN

The two-stroke engines have never acquired the popularity of the four-stroke engines due to their inherent performance limitations. The tasks of many engineering teams were to find the basic causes, which resulted in the inferior performance of these engines. Today’s task is to build a two-stroke engine whose performance could match that of a four-stroke engine in areas of common use. The most typical performance problems of a two-stroke engine are high petrol consumption caused by low efficiency, toxic by-products of combustion being emitted into the atmosphere (caused by oil present in the petrol), and uneven and loud engine noise. The greatest challenge is to achieve a good chamber purge during one stroke in which the fresh fuel mixture flows through the piston-controlled inlet port while at the same time the fumes are being exhausted through the outlet port. This in contrast with the four-stroke engines where the intake and exhaust are each done with two separate strokes. From the energy point of view, the two-stroke engine is not efficient because a certain amount of fresh fuel is being wasted in the exhaust fumes. We propose to replace the piston-controlled cam with the valve-flushed system, which will cause the combustion process to become more efficient. The purpose of this paper is to present various designs of the engine heads and analyse their performance. The goal of this proposal is to choose the best combination of these engine heads in order to achieve the optimum overall engine performance.

Słowa kluczowe

EN

engine; two-stroke; internal combustion; valve flushed system; piston-controlled cam; high petrol consumption; oil in the petrol; toxic by-products; loud noise; uneven running; low efficiency

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2015
• Tom: Vol. 22, No. 4
• Strony: 187--190
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Łoza Ł.

• Wroclaw University of Technology Department of Vehicles Engineering Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland tel.: [phone], fax: [phone]

autor

Kaźmierczak A.

• Wroclaw University of Technology Department of Vehicles Engineering Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland tel.: [phone], fax: [phone]

autor

Borkowska J.

• Wroclaw University of Technology Department of Vehicles Engineering Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland tel.: [phone], fax: [phone]

autor

Skorupa P.

• Wroclaw University of Technology Department of Vehicles Engineering Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland tel.: [phone], fax: [phone]

autor

Krakowian K.

• Wroclaw University of Technology Department of Vehicles Engineering Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland tel.: [phone], fax: [phone]

autor

Cienciała M.

• Wroclaw University of Technology Department of Vehicles Engineering Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Kuśmidrowicz, J., Report no. 5-071/2006 Koncepcje rozwoju tłokowego dwusuwowego silnika spalinowego nowej generacji i szanse ich realizacji przy współczesnym stanie techniki, Wroclaw University of Technology, Wroclaw 2006.
• [2] Kuśmidrowicz, J., Report no. S-059/2002 Badania procesu wymiany ładunku w silniku dwusuwowym nowej generacji", Wroclaw University of Technology, Wroclaw 2002.
• [3] Łoza, Ł., Master's thesis: Analiza konstrukcji głowicy dwusuwowego silnika spalinowego płukanego zaworami, Wroclaw University of Technology, Wroclaw 2015.