Dependence of durability and wear resistance on forcing and inaccuracies in ICE production

In this paper, the dependence of durability and wear resistance of parts on forcing and technical capabilities of the ICE production is analyzed. The development of engine building characterizes acceleration of ICE. Errors include a gap and correspondence of micro- and macrogeometry of the friction surfaces of the parts to their optimal, attained parameters. To ensure the operability, preservation and improvement of durability and wear resistance of parts, when forcing, the errors decrease. The purpose of the study is to evaluate the durability and wear resistance of parts from the technical capabilities of engine building, caused by design and production errors and the level of ICE forcing. The relationship between forcing, production and reliability is analyzed by the dynamics of development of automotive ICEs, empirical and predicted durability data and wear resistance of the crank mechanism and cylinder-piston group. The proportionality coefficient and the theoretical error of design and production of internal combustion engine for GAZ and ZMZ engines are being calculated. With modernization of production and reduction of errors, the technical characteristics of both an engine and a vehicle are improving. The connection between the engine and the car is given. Dependences of design and production errors and wear rates of the details of the crank mechanism and the cylinder-piston group on the forced internal combustion engine are derived. It is determined that with increase in compression ratio and the speed of a crankshaft, the wear rate decreases faster than the errors. This is due to the influence of errors on the properties of tribo-coupling, motor and car, the coordinated development of which provides increased growth of durability and wear resistance of parts.

design and production errors, wear rate, compression ratio, crankshaft speed