Realization of the Atkinson-Miller cycle in spark-ignition engine by means of the fully variable inlet valve control system

Open access

Abstract

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.

[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 Im- provement in an Internal Combustion Engine.Silesian UT, Gliwice 2010 (in Polish).

[4] Postrzednik S., Żmudka Z.: Thermodynamic an Ecological Aspects of Combus- tion Engines Operation. Silesian UT, Gliwice 2007 (in Polish).

[5] Postrzednik S., Żmudka Z.: Research on Procedures of Independent Valve Con- trol 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. Symp. “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 tim- ing system using electromagnetic mechanism. SAE Tech. Pap. 2004-01-1869, 2004.

[13] Farzaneh-Gord M., Reza Behi M., Yahyaie A., Mirmohammadi S.: Esti- mating 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.

Archives of Thermodynamics

The Journal of Committee on Thermodynamics and Combustion of Polish Academy of Sciences

Journal Information


CiteScore 2016: 0.54

SCImago Journal Rank (SJR) 2016: 0.319
Source Normalized Impact per Paper (SNIP) 2016: 0.598

Cited By

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 133 133 8
PDF Downloads 49 49 4