| 摘要 |
PURPOSE:To improve the oil consumption, seizure and the initial scuffing of a piston. CONSTITUTION:The inclination of cross hatches, formed on the inner surface of a cylinder bore 1 by the locus of a honing wheel at the time of the honing wheel moving vertically while rotating, in relation to the face orthogonal to the center axis of a cylinder bore 1 is set to approximately 30 deg. so as to be easy in an area of length alpha. from the upper end of the cylinder bore 1, where a piston ring does not slide, and set to 45 deg. in the sliding area of the piston ring 45. |
