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The theoretical analysis of the charge exchange process in a spark ignition engine has been presented. This process has significant impact on the effectiveness of engine operation because it is related to the necessity of overcoming the flow resistance, followed by the necessity of doing a work, so-called the charge exchange work. The flow resistance caused by the throttling valve is especially high during the part load operation. The open Atkinson-Miller cycle has been assumed as a model of processes taking place in the engine. Using fully variable inlet valve timing the A-M cycle can be realized according to two systems: system with late inlet valve closing and system with early inlet valve closing. The systems have been analysed individually and comparatively with the open Seiliger-Sabathe cycle which is a theoretical cycle for the classical throttle governing of the engine load. Benefits resulting from application of the systems with independent inlet valve control have been assessed on the basis of the selected parameters: fuel dose, cycle work, charge exchange work and a cycle efficiency. The use of the analysed systems to governing of the SI engine load will enable to eliminate a throttling valve from the system inlet and reduce the charge exchange work, especially within the range of part load operation.
Czasopismo
Rocznik
Tom
Strony
191--205
Opis fizyczny
Bibliogr. 14 poz., il.
Twórcy
autor
- Silesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, Poland
autor
- Silesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, Poland
autor
- Silesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, Poland
Bibliografia
- [1] SZARGUT J.: Technical Thermodynamics. Silesian UT, Gliwice 2000 (in Polish).
- [2] ŻMUDKA Z., POSTRZEDNIK S.: Flow resistance in the engine inlet-exhaust system as affected by the engine parameters. Combust. Eng. 136(2009), 1, 31-40.
- [3] ŻMUDKA Z.: Energy and Ecological Aspects of the Charge Exchange Process Improvement in an Internal Combustion Engine.Silesian UT, Gliwice 2010 (in Polish).
- [4] POSTRZEDNIK S., ŻMUDKA Z.: Thermodynamic an Ecological Aspects of Combustion Engines Operation. Silesian UT, Gliwice 2007 (in Polish).
- [5] POSTRZEDNIK S., ŻMUDKA Z.: Research on Procedures of Independent Valve Control in Combustion Engines. Project no. N502 026 32/2190. PBU-30/RIE-6/07, 05.2007 - 06.2009, Rap., Gliwice 2009 (in Polish).
- [6] COPE D., WRIGHT A., CORCORAN C., PASCH K.: Fully flexible electromagnetic valve actuator: design, modeling, and measurements. SAE Tech. Pap. 2008-01-1350, 2008.
- [7] FRANCA O.M.: Impact of the Miller cycle in the efficiency of an FVVT engine during part load operation. SAE Tech. Pap. 2009-36-0081.
- [8] HAAS M., RAUCH M.: Electro-hydraulic fully variable valve train system. ATZ Autotechnology 10(2010), 02.
- [9] BERNARD L., FERRARI A., RINOLFI R., VAFIDIS C.: Fuel economy improvement potential of UniAir throttle-less technology. In: Proc. ATA Int. Synip. "SIE: the CO2 challenge", 02A5012, Venice 2002.
- [10] MIANZO L., NEWTON S., POPOVIC Z.: Integrated control and power electronics for an electro-mechanical valve actuation system. Proc. IEEE/ASME, 2005.
- [11] PICRON V., POSTEL Y., NICOT E., DURRIEU D.: Electro-magnetic valve actuation system: first steps toward mass production. SAE Tech. Pap. 2008-01-1360, 2008.
- [12] SUGIMOTO C., SAKAI H., UMEMOTO A., SHIMIZU Y.: Study on variable valve timing system using electromagnetic mechanism. SAE Tech. Pap. 2004-01-1869, 2004.
- [13] FARZANEH-GORD M., REZA BEHi M., YAHYAIE A., MIRMOHAMMADI S.: Estimating recoverable work of an engine by utilizing the CO2 Brayton power cycle and capturing heat lost. Arch. Thermodyn. 30(2009), 3, 89-110.
- [14] FARZANEH-GORD M., HAJIALIZADEH H., KHOSHNEVIS A.B.: The first and second law analysis of a spark ignited engine fuelled with alternative fuels. Arch. Thermodyn. 30(2009), 1, 73-98.
Uwagi
EN
This scientific work was supported by Faculty of Power and Environmental Engineering of the Silesian University of Technology within the statutory research.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-39f207a0-20d8-4458-a1e7-60e8f28d1f73