Reliability Analysis and Evaluation of Differential System Based on low Load Strengthening Model

Abstract

The differential is an important part of a driveline, and differential performance is related to the handling and stability performance of a vehicle. Thus, a differential with sound design structure and reasonable form and size parameters could lead to satisfactory driving performance. In this work, we analyze and evaluate the reliability of the key parts of a differential system. Firstly, each of key parts is regarded as a subsystem of a differential system, so the subsystem reliability models are obtained. A system reliability model is built based on the paths of the forces from the differential system, and system reliability is calculated. Secondly, according to the result of the analysis of system reliability and the use of the six sigma method, 45 steel or 1Cr18Ni9Ti utilized as the material for the worm shaft, system reliability is analyzed and discussed separately. Then, the reliability of the key parts and the overall system reliability increase with the low load strengthening characteristic of the material. Finally, according to the analysis and discussion, the level of system reliability matches that required for differential systems, and the cost is also considerably reduced, as demonstrated using the stress-strength interference and low-load strengthening models. These results provide a theoretical basis for the improvement of the design of Torsen differentials. Similar methods can be used to develop automobile subsystems in the future.

Reliability Research Reviewed of Automobile Seat Angle-Adjuster

“…The failure caused by wear is a fuzzy event, that is to say, wear to what extent is a fuzzy concept. On this occasion, we should adopt the fuzzy reliability design [23].…”

Research on meta‐action decomposition and meta‐action unit modeling technology for electromechanical product

“…1 Therefore, it is necessary to decompose it into units, which are easy to study; then the decomposed units are analyzed, and the PAPRA of the whole machine can be evaluated finally by the coupling relationship between the decomposed units. [5][6][7][8][9][10] The life cycle of electromechanical product is dynamic; the function and performance of the whole machine are realized by the function and performance of components, and the function and performance of the components are determined by the motion transfer relationship between parts. [5][6][7][8][9][10] The life cycle of electromechanical product is dynamic; the function and performance of the whole machine are realized by the function and performance of components, and the function and performance of the components are determined by the motion transfer relationship between parts.…”

“…The current decomposition methods for electromechanical product are mostly based on the structure of product or component system, such as literature [2][3][4] The smallest unit obtained by these methods is part; the decomposition results can also not reflect the characteristics of electromechanical product that 'action determines function and performance', and it is not reasonable to take them as research objects. [5][6][7][8][9][10] The life cycle of electromechanical product is dynamic; the function and performance of the whole machine are realized by the function and performance of components, and the function and performance of the components are determined by the motion transfer relationship between parts. Therefore, it can be concluded that the failure of electromechanical product's function and performance is ultimately caused by the failure of mechanical parts' motion state.…”

Identification of the influential parts in a complex mechanical product from a reliability perspective using complex network theory

“…Complex mechanical products (CMPs) consist of a large number of different types of components and parts, featuring complex design, long R&D cycles, complex coupling between parts, and high manufacturing costs . At present, many studies have performed in‐depth research on the design, remanufacturing, and assembly of CMPs, which often involve the study of influential components and parts . Research on the influential parts of a CMP shows that the influential parts are the core of the product architecture and are of great importance to the reliability of a CMP.…”