Analysis of the Influence of Installation Deformations of Diesel Cylinder on Its Operating Indicators

The article presents the results of experimental studies of changes in the inner diameter of the cylinder of air-cooled multipurpose diesel engines from the action of mounting forces, as well as the patterns of the effect of mounting deformations of the diesel cylinder on its performance. The internal diameter of the investigated cylinders was measured on control and measuring machine after the application and removal of mounting forces. To simulate the application of mounting forces, a cassette device was made that simulated the upper part of the diesel crankcase and the cylinder head and made it possible to measure the internal diameter of the cylinder in a stressed state. It is established that cylinder deformations are elastic. To increase the stability of the cylinder geometry, the technology of honing cylinders in a stressed state (in cassette devices) was tested and an experimental assessment of its effectiveness was carried out. The test results of the 1H9,5/8,0 diesel engine with serial and experimental cylinders are presented. It is shown that a diesel engine with an experimental cylinder at an operating time of 13 h, has effective indicators that fully meet the requirements of TU and are practically not inferior to a diesel engine with serial cylinders at an operating time of 21 h. An analysis of the results allows us to recommend a running time of 13 h.