Observation of Knock Using a High Speed Shutter TV Camera System

An ultra-high speed shutter TV camera including an image intensifier which has a light magnification of 20,000, and an image analysis system have been developed and applied to knock research with a transparent piston engine. Irregularity in the flame configuration was observed just when the pressure vibration began. The causes of cycle to cycle variation of knock intesity were examined through the simultaneous recording of the pressure vibration and the image of the flame.