抄録
By applying a smoke-wire method, the air swirl in a diesel engine cylinder was visualized successfully in the condition of motoring. The specially designed single cylinder engine used has an observation window on the top surface of piston. The smoke-wire was made of 4 intertwisted nichrome wires each with a diameter of 0.17mm and set up near the cylinder head and nearly in the direction of cylinder diameter, and was coated with glycerin. This cylinder part (15mm thick) was made transparent. The smoke was illuminated from the flank and taken photograph from bellow the piston using a reflex mirror and a high speed camera. The capacity of discharge condenser was 1500μF and the charge voltage was 250 volts d.c.
