Effect of the Piston Ring Shape on the Ring-Stick of an Air Cooled 2-Stroke Diesel Engine

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A test engine which is an air cooled single cylinder diesel engine (D×S=88×100 mm) has a stick developed easily.When we put the ring which has a large side clearance in the ring groove or an inside taper ring into the rectangular groove, the ring-stick is prevented. To find out the cause, we measured the piston temperature, quantity of gas leakage, and radial and axial motions of the ring with a special device.