The purpose of this study is to prevent the stick. scuffing. scratch between piston and cylinder in advance, to obtain data for duration test in actual engine operation. Therefore, temperature gradient in peripheral and axial distribution of cylinder ...
The purpose of this study is to prevent the stick. scuffing. scratch between piston and cylinder in advance, to obtain data for duration test in actual engine operation. Therefore, temperature gradient in peripheral and axial distribution of cylinder bore were measured in use of 800cc class gasoline engine. The results obtained are summarized as follows ;
1) The maximum reaction force by overlap is 101.97kg. The skirt length at that position is 10mm from skirt upper.
2) The rear side temperature of top dead center is 142℃ in peripheral distribution, it is about 20℃ higher than thrust, anti-thrust, front side temperature.
3) The rear side temperature of bottom dead center is 125℃ in axial distribution, whereas the rear side of midway position temperature is 120℃.
4) The temperature of cylinder wall is about 20∼30℃ higher than temperature of cooling water.
5) The temperature of cylinder wall at top dead center in use of SAE ?? lubricating oil is 16℃ higher than SAE 20 at 6000rpm.