The influence of non-cooled exhaust gas recirculation on the indicator diagrams and heat release parameters in diesel engine cylinder

• Autorzy: Cisek J.

Identyfikatory

DOI

10.19206/CE-2017-449

• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of the diesel engine research on the indicator and heat realized diagrams for VW 1.9 TDI working in 2 modes: with standard, non-cooled EGR system, and without this system. All of measurement was carried out on the some engine speed – 2000 rpm (speed of maximum engine torque) and various engine load. Some of the analyzed parameters were read directly from the measurement systems (e.g. indicator diagrams) or engine controller (e.g. start of injection) and the rest of them had to be calculated. The calculation of rate of heat release (δQ/dα) was based on the well-known mathematical model. When the exhaust gas recirculation valve is open, the maximum of combustion pressure and rate of maximum kinetic heat release (δQ_k/dα)_max are smaller than when the valve is closed. These facts are connected with the shorter self-combustion delay for engine working with EGR. But this is also associated with reduction of the rate of maximum diffusion heat release (δQ_d/dα)_max, which means that more particulates (PM) are excreted into the atmosphere. This fact explains e.g. significantly higher smog of exhaust gases for diesel engine which works with EGR system. The analysis results show that exhaust gas recirculation system slightly deteriorates the energetic parameters of VW 1.9 TDI engine, but, at the same time, significantly reduces the level of toxic nitrogen oxides in exhaust gases.

Słowa kluczowe

EN

diesel engine; exhaust gases; exhaust gas recirculation; EGR; indicator diagrams; rate of heat release

PL

silnik spalinowy; spaliny; recyrkulacja spalin; wykresy indykatorowe; przebieg wywiązywania się ciepła

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2017
• Tom: R. 56, nr 4
• Strony: 283--288
• Opis fizyczny: Bibliogr. 5 poz., wykr.

Twórcy

autor

Cisek J.

• Faculty of Mechanical Engineering at Cracow University of Technology

Bibliografia

• [1] HEYWOOD, J.B. Internal combustion engine fundamentals. McGraw-Hill. Series in Mechanical Engineering. 1988.
• [2] WIMMER, A., GLASER, J. Indykowanie silnika. AVL. Warszawa 2004.
• [3] MERKISZ, J. Ekologiczne problemy silników spalinowych. Tom 1. Wydawnictwo Politechniki Poznańskiej. Poznań 1998.
• [4] MYSZKOWSKI, S. Recyrkulacja spalin w silnikach cz. 1. Dodatek techniczny do wiadomości Inter Cars S.A. 2010, 35.
• [5] CIEŚLIK, W., BOROWSKI, P., PIELECHA, I. et al. System recyrkulacji spalin we współczesnych konstrukcjach silnikowych. Logistyka. 2014, 3.