Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Hunicz Jacek, Gęca Michał Sławomir, Mikulski Maciej, Tyda Robert
Rok wydania:	2017
URL do źródła	LINK
Język:	angielski
Źródło:	Proceedings of the 2 nd World Congress on Momentum, Heat and Mass Transfer (MHMT’17)
Miasto wystąpienia:	Barcelona
Państwo wystąpienia:	HISZPANIA
Efekt badań statutowych	NIE
Abstrakty:	angielski
	In this paper Homogeneous Charge Compression Ignition (HCCI) engine utilising Negative Valve Overlap (NVO) injection of gasoline was subjected to combined experimental and numerical investigation. The thermal effects of direct fuel injection during NVO and its impact on intake process as well as main event compression temperature histories were investigated in this study. The research was performed for a constant speed of 1500 rev/min and two main event excess air ratios (stoichiometric =1 and lean =1.2). Recorded incylinder pressure signal served as the basis of numerical calculations performed in AVL-BOOST software. It was shown that NVO injection timing to some extent can be used as a measure to control combustion phasing. Injection timing influenced combustion phasing through changing the gasoline residence time and temperature of trapped exhaust gasses during the NVO period. At the same time important correlations between cylinder thermal conditions in NVO and intake valve flow were identified

Experimental and Numerical Investigation into the Thermal Effects of Direct Fuel Injection in HCCI Engine