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

Archives of Thermodynamics

Zbigniew ?mudkaCorresponding authorSilesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Stefan PostrzednikSilesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Grzegorz Przyby?aSilesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1]Silesian University of Technology, Institute of Thermal Technology, Konarskiego 18, 44-100 Gliwice, Poland

关键词: Keywords: Spark-ignition engine;    Variable inlet valve control;    Open theoretical cycle;    Charge exchange process;   

DOI  :  10.2478/aoter-2014-0029

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

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.

【 授权许可】

Unknown