Effect of Heat Treatment on Cylinder Block Bore Distortion

Abstract

Cylinder block bore distortion has a significant role in the lubricant oil consumption and subsequent block piston assembly failure. The paper discusses the methods to quantify the distortion levels in the cylinder block caused by the heat treatment involved. The optimization of the heat treatment process is discussed in detail with the specimen test, cylinder block individual tests and aggregate vehicle tests. The results show a new philosophy for cylinder block bore distortion-ring conformability.