Influence of Injection Parameters on the Local Crank Angle Resolved Heat Flux on the Piston Wall

Artikel i vetenskaplig tidskrift, 2004

This paper presents an investigation of the effects of different injection parameters and engine operational conditions on the combustion, local crank angle resolved temperature and heat flux in a single cylinder heavy duty DI diesel research engine with a displacement of 2.02 I. The investigated injection parameters and engine conditions were: Start of Injection (SOl), Needle Opening Pressure (NOP), injection duration, Exhaust Gas Recirculation (EGR), engine load and engine speed. The local crank angle resolved surface temperature was measured at nine different positions along the spray axis and between two sprays at the piston wall. The instantaneous heat flux was calculated from the measured temperature traces by solving the one-dimensional unsteady heat conduction equation.