Experimental Research on Modulation Characteristics of Wheel Cylinder Pressure in Electro-hydraulic Braking System

doi:10.3969/j.issn.1000-1093.2013.08.015

Abstract

Abstract:

The electro-hydraulic brake (EHB) system consists of mechanical, electromagnetic and hydraulic parts. The pressure characteristic of its wheel cylinder is essential to the brake force modulation. But this characteristic is hard to be expressed with theoretical models because of the heavy nonlinearity and coupling of the system's main parts. In the research, the experiments are carried out to study this characteristic. The essential affecting factors considered in the experiment design contain the initial pressure and the duty cycle of PWM signal. The stable variation MAP is got from the experimental results. The analysis shows that there are the inflection points in the stable variation value and initial pressure curves. The inflection point is defined as the piston travel end pressure. In this system, the pressure is 2. 8 MPa. The analysis also shows that the relationship between the pressure variation and duty cycle is linear. But the line does not go across the origin point. The cross point is at 3% of the duty cycle during pressurizing, while it is at - 5% of the duty cycle during depressurizing. In the research on pressure characteristics, the nonlinear characteristics of the system are expressed by MAP, and some parts with linear relation in the system are found.

Key words: mechanics, electro-hydraulic brake system, wheel cylinder pressure, high speed valve

CLC Number:

U461. 3

XU Zhe, WEI Min-xiang, LI Yu-fang, LIU Rui, SHI Zhi-xiao. Experimental Research on Modulation Characteristics of Wheel Cylinder Pressure in Electro-hydraulic Braking System[J]. Acta Armamentarii, 2013, 34(8): 1013-1020.

References

[1] Jonner W D, Winner H, Dreilich L, et al. Electrohydraulic brake system: the first approach to brake-by-wire technology[J]. SAE transactions, 1996, 105(6): 1368 -1375. [2] Hoseinnezhad R, Bab-Hadiashar A, Rocco T. Real-time clamp force measurement in electromechanical brake calipers[J]. IEEE Transactions on Vehicular Technology, 2008, 57(2): 770 -777. [3] Hong D, Hwang I, Yoon P, et al. Development of a vehicle stability control system using brake-by-wire actuators[J]. Journal of Dynamic Systems, Measurement, and Control, 2008, 130(1): 011008 -1 -9. [4] 徐哲, 魏民祥, 李玉芳. 线控液压制动系统轮缸压力变化特性[J]. 交通运输工程学报, 2013, 13(1):55 -61. XU Zhe, WEI Min-xiang, LI Yu-fang. Variation characteristic of wheel cylinder pressure in electro-hydraulic braking system controlled by PWM signal[J]. Journal of Traffic and Transportation Engineering, 2013, 13(1): 55 -61. (in Chinese) [5] 李志远, 刘昭度, 崔海峰, 等. 汽车ABS 制动轮缸压力变化速率模型试验[J]. 农业机械学报, 2007, 38(9):6 -9. LI Zhi-yuan, LIU Zhao-du, CUI Hai-feng, et al. Experimental study on change rate model of brake pressure of ABS wheel cylinder[J]. Transactions of the Chinese Society for Agricultural Machinery, 2007, 38(9): 6 -9. (in Chinese) [6] Saric S, Bab-Hadiashar A, Walt J. Estimating clamp force for brake-by-wire systems: thermal considerations[J]. Mechatronics,2009, 19(6): 886 -895. [7] JEONG H S, KIM H-E. A methodology to investigate the dynamic characteristics of ESP hydraulic units-part I: hydraulic tests[C]//The 4th WSEAS International Conference on Fluid Mechanics and Aerodynamics. Elounda, Greece: WSEAS, 2006: 266 -274. [8] Keles O, Ercan Y. Theoretical and experimental investigation of a pulse-width modulated digital hydraulic position control system [J]. Control Engineering Practice, 2002, 10(6): 645 -654. [9] Mahrenholz J, Lumkes J. Analytical coupled modeling and model validation of hydraulic on/ off valves[J]. Journal of Dynamic Systems, Measurement, and Control, 2010, 132(1): 011005 - 1 -10. [10] 王扬彬. 液压支架电磁阀数值仿真研究[D]. 杭州: 浙江大学, 2008: 15 -62. WANG Yang-bin. Simulation study of pilot solenoid valve used in hydraulic support[D]. Hangzhou: Zhejiang University, 2008:15 -62. (in Chinese) [11] 郭孔辉, 刘溧, 丁海涛, 等. 汽车防抱制动系统的液压特性[J]. 吉林工业大学: 自然科学学报, 1999, 29(4): 1 -5. GUO Kong-hui, LIU Li, DING Hai-tao, et al. A study on hydraulic characteristics of anti-lock braking system[J]. Natural Science Journal of Jinlin University of Technology, 1999, 29(4): 1 -5. (in Chinese) [12] Jeong H S, Kim H E. Experimental based analysis of the pressure control characteristics of an oil hydraulic three-way on/ off solenoid valve controlled by PWM signal[J]. Journal of Dynamic Systems, Measurement, and Control, 2002, 124 (1): 196 -205.

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