A method for determining engine bearing shell parameters

Abstract

The invention discloses a method for determining engine bearing shell parameters. The method comprises the following steps of: acquiring shafting related parameters and setting a reference value of the bearing bush parameters; establishing the dynamic model of the crankshaft system according to the reference values of the shaft system parameters and the bearing bush parameters; determining the worst working conditions; adjusting the value range of the bearing bush parameter on the basis of the reference value of the bearing bush parameter to obtain the minimum friction loss work under the worst working condition; if the minimum friction loss work under the worst working condition is less than or equal to the preset target value, the value of the bushing parameter corresponding to the minimum friction loss work under the worst working condition is output. The embodiment adopts the simulation method to design the bearing bush parameters, so that the optimal bearing bush parameters can beobtained in the design process, and the situation that the bearing bush cannot meet the requirements can be avoided after the design of the whole machine is completed.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of engine design, and in particular to a method for determining engine bearing parameters. Background technique [0002] The main bush of the engine is installed on the main bearing seat of the machine body, and its function is to reduce the frictional resistance of the journal and reduce the wear of the journal. When the engine is working, the bearing bush will bear the impact force transmitted by the moving parts, which not only wears out the adjacent parts, but also bears the maximum load. During the working process of the engine, the friction loss work caused by the friction between the bearing bush and other adjacent parts will lead to an increase in the fuel consumption of the whole vehicle. [0003] In the existing technical scheme, the engine vehicle test can only be carried out after the prototype production is completed. If the bearing pad design does not meet the design ...

AI Technical Summary

Problems solved by technology

During the working process of the engine, the friction loss work caused by the friction between the bearing bush and other adjacent parts will lead to an increase in the fuel consumption of the whole vehicle

[0003] In the existing technical scheme, the engine vehicle test can only be carried out after the prototype production is completed. If the bearing pad design does not meet the design target after the engine vehicle test is completed, the post-stage optimization of the bearing pad will be very passive.

Images