CN-121997445-A - Friction force prediction method and related equipment

CN121997445ACN 121997445 ACN121997445 ACN 121997445ACN-121997445-A

Abstract

The application provides a friction prediction method, which comprises the steps that a controller obtains the speed and the size of a moving part moving along an oil film formed by lubricant in an engine, obtains the load constant of the engine, and determines the equivalent contact area of the moving part and the oil film according to the size of the moving part. The controller then predicts the friction of the moving member based on the equivalent contact area, the lubrication coefficient of the lubricant, the speed of the moving member, and the load constant of the engine. The data required by the method can be obtained through measurement, inquiry and other modes, is easy to obtain quickly, can realize quick prediction of friction force, and has higher feasibility. Meanwhile, the method is simple to realize and has lower operation requirement on the execution equipment.

Inventors

NIE SHUYI
XUE LIXIN
WANG PENGPENG
CHEN HUI
JIAO YUFU
TANG PEIDONG
SUN HAOHAO
CHEN LIPING

Assignees

上海汽车集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (10)

1. A method of friction prediction, the method comprising: Acquiring the speed and the size of a moving member moving along an oil film formed by a lubricant in an engine, and acquiring a load constant of the engine; determining an equivalent contact area of the moving member and the oil film according to the size of the moving member; And predicting the friction force of the moving part according to the equivalent contact area, the lubrication coefficient of the lubricant, the speed of the moving part and the load constant of the engine.
2. The method according to claim 1, wherein the method further comprises: acquiring the number of cylinders and the single-cylinder working volume of the engine; Determining a friction torque of the moving member based on the friction force and the size of the moving member; And predicting the equivalent pressure of the friction force of the moving part on other parts in the engine according to the friction torque of the moving part, the number of cylinders of the engine and the single-cylinder working volume.
3. The method according to claim 1, wherein the method further comprises: and when the predicted value of the friction force of the moving part meets the numerical range, determining the characteristic information of the moving part so as to complete the design of the moving part.
4. The method of claim 3, wherein the characteristic information comprises at least one of a material of the moving part, internal structural information of the moving part, machining accuracy of the moving part, or an ambient temperature of the moving part.
5. The method of any one of claims 1 to 4, wherein the moving member comprises a rotary moving member or a reciprocating moving member.
6. The method of claim 5, wherein the method further comprises: And determining the friction index of the engine according to the friction force of the rotary moving part and the friction force of the reciprocating moving part.
7. A friction predicting device for a moving member, the device comprising: The acquisition module is used for acquiring the speed and the size of a moving part moving along an oil film formed by the lubricant in the engine and acquiring the load constant of the engine; The prediction module is used for determining the equivalent contact area of the moving piece and the oil film according to the size of the moving piece; The prediction module is further configured to predict a friction force of the moving member based on the equivalent contact area, a lubrication coefficient of the lubricant, the speed of the moving member, and the load constant of the engine.
8. A controller is characterized in that, the controller includes: a memory for storing a computer program or computer instructions; A processor for executing a computer program or computer instructions stored in the memory, causing the motor controller to perform the method of any one of claims 1 to 6.
9. A computer storage medium for storing a computer program for implementing the method according to any one of claims 1 to 6 when executed.
10. A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the method according to any of claims 1 to 6.

Description

Friction force prediction method and related equipment Technical Field The present application relates to the field of automotive technology, and in particular, to a friction force prediction method, a friction force prediction device, a controller, a computer readable storage medium, and a computer program product. Background Engines are an important component of automobiles for converting other forms of energy, such as electrical energy, chemical energy, etc., into mechanical energy to drive the automobile. The stable operation of the engine is not separated from the precise matching and coordination between the moving parts inside, and friction force is inevitably generated during the process. The friction force not only can convert part of energy of the engine into heat energy to be dissipated, but also can accelerate the abrasion of engine parts and shorten the service life of the engine. Therefore, it is necessary to accurately predict the friction of the moving parts inside the engine, thereby facilitating the design, maintenance and management of the engine. The current friction prediction is often modeled and predicted by finite element analysis (FINITE ELEMENT ANALYSIS, FEA) software, however, the prediction mode needs more parameters and is not easy to obtain, so that the prediction period is longer, the efficiency is lower, and the industrial design and production are not facilitated. Disclosure of Invention In view of the above, the present application provides a friction prediction method and related apparatus, so as to solve the problems of longer prediction period and lower efficiency due to more parameters of the moving parts required for prediction and difficult availability. In a first aspect, the present application provides a friction prediction method, the method comprising: The controller obtains the speed and the size of a moving member moving along an oil film formed by the lubricant in the engine, obtains the load constant of the engine, and determines the equivalent contact area of the moving member and the oil film according to the size of the moving member. The controller then predicts the friction of the moving member based on the equivalent contact area, the lubrication coefficient of the lubricant, the speed of the moving member, and the load constant of the engine. In some possible implementations, the controller may also predict an equivalent pressure of the friction of the moving part against the engine. Specifically, the controller may acquire the number of cylinders and the single cylinder working volume of the engine and determine the friction torque of the moving member based on the friction and the size of the moving member. The controller can predict the equivalent pressure of the friction force of the moving part on other parts in the engine according to the friction torque of the moving part, the number of cylinders and the single-cylinder working volume of the engine. In some possible implementations, when the predicted value of the friction force of the moving member meets the numerical range, the controller may determine the characteristic information of the moving member to complete the design of the moving member. That is, the controller may predict the friction force according to the size of the moving member, and then design the detail feature of the moving member when the friction force of the moving member reaches a preset numerical range. For example, the characteristic information may include a material of the moving part, internal structural information of the moving part, machining accuracy of the moving part, an ambient temperature of the moving part, or other conditions affecting a state of the moving part, and the like. Wherein the internal structural information of the moving member includes structural details of the moving member, different from the external dimension of the moving member. For example, when the moving member is composed of a plurality of parts, the internal structural information of the moving member may include a specific position of each part and characteristics of holes, grooves, ridges, cuts, rounded corners, etc. of each part. Therefore, when the predicted value of the friction force of the moving part does not meet the preset condition, parameters such as the size of the moving part can be directly and rapidly modified, and the modification difficulty and the modification workload of related technicians are reduced. In some possible implementations, the moving member may include a rotary moving member or a reciprocating moving member. The rotary motion member refers to a part or assembly which performs rotary motion around a certain axis, such as a journal, a gear, and the like. A shuttle refers to a part or component in the apparatus that performs a periodic reciprocating motion, such as a piston, cylinder, slide, etc. In some possible implementations, when the moving member is a rotating moving member, the controller may a