Analysis of out-of-round deformation of a dry cylinder liner of a non-road high-pressure common-rail diesel engine based on multi-field coupling

The deformation of cylinder liner directly affects the sealing performance friction components in internal combustion engines, resulting high oil consumption, engine power loss, and high-particulate matter emissions. Previous research works focused more on wet vehicular liners, however, effects different loads dry is not clear yet. A non-road high-pressure common-rail diesel was selected as object, a coupled model developed based fluid–solid heat transfer theory. After accuracy verified by temperature measurement head liner, studied. results show that axial radial deformations are uniform under bolt preload condition. Large occurs at first fourth with maximum occurring top for 10.14 μm. Under condition thermal load, exhibits distribution three-segments from to bottom. uniform, 304 all four liners present symmetrical structure “heart” shape respect centerline second third cylinders. each “barrel” which convex middle narrow two ends.