Abstract
In this study, in-cylinder flow and turbulence characteristic induced by intake switching device, TCV (Tumble Control Valve) is investigated on a single cylinder optical engine with a transparent sleeve using high speed PIV. As a result of analysis, turbulent kinetic energy at the end of compression stroke increases by TCV. However it is clarified that an optimization of TCV is necessary because there is some cases which turbulence does not increase by some TCV specification. Since combustion duration on a metal multi cylinder engine decreases by optimal TCV specification, it is confirmed that TCV is an effective devise for enhancement of in-cylinder flow.
