A0級(jí)小型純電動(dòng)汽車磁流變液制動(dòng)器結(jié)構(gòu)設(shè)計(jì)及其性能研究.pdf

1、 摘要 Ⅱ Subject: A0 Class Small Pure Electric Vehicles MRF Brake Structure Design and Performance Specialty: Vehicle Engineering Name: Zhang Jiangtao

2、 Supervisor: Guo Zhijun Tian Zhaoyang ABSTRACT Magnetorheological fluid (Magneto-rheological Fluids, MRF) is a new kind of intelligent materials. MRF can be instant, continuous and reversible rheolog

3、ical in the magnetic field, in addition, it can be real-time active controlled. Through the reasonable structure design and magnetic circuit current control with the characteristics of magnetorheological fluid, it can be

4、 applied to the automobile braking system and achieved rapid, continuous change, so it achieves the aim of control of braking torque according to the actual needs. Because the development of the electric car, the cancell

5、ation of the engine braking system can't satisfy the vacuum source condition, the need to increase the vacuum pump to extract the vacuum source, is more complex to the arrangement of the vehicle and the matching, MRF

6、 brake and can realize full electric control, solve the problems of the electric vehicle braking system. MRF brake and compared with the traditional mechanical friction brake, has good control performance, fast response

7、and low energy consumption etc, so the study of MRF brake conforms to the developing direction of the cars of the future, so the study of MRF brake conforms to the development direction of the cars of the future, it need

8、 to be studied. Based on the analysis of MRF performance and operation modes of MRF, put forward the two kinds of MRF brake structure: drum and disc type. With introducing the works of cylinder and disc type of MRF brake

9、, and calculating two kinds of brake torque, through comparative analysis the advantages and disadvantages of two kinds of brake, determined the MRF brake structure form which is suitable for this article. Calculate the

10、main structure parameters of MRF brake of MRF brake and magnetic circuit design, finally, completed the overall structure scheme of MRF brake arrangement and draw the MRF brake general structure diagram. According to MRF