集成式电液制动系统设计及参数匹配的研究

doi:10.19562/j.chinasae.qcgc.2022.09.013

Abstract

Abstract:

In this paper, an integrated electro-hydraulic braking system is designed through theoretical research and structural analysis, and the working characteristic and performance parameters of key components of the system are preliminarily determined by the analysis and calculation of the hydraulic system and its auxiliary mechanical system. A simulation model of the brake system is built by using AMESim software, and a simulation is conducted to verify the basic functions of the system. Furthermore, the influence of motor powers on the dynamic characteristics of the braking system is studied to obtain the best parameters of drive motor. Finally, a co-simulation on the overall performance of the braking system is carried out. The results show that the integrated electro-hydraulic braking system designed fully meets the braking requirements of intelligent driving vehicles, with all the indicators reaching and even exceeding the national standard.

Key words: electro-hydraulic braking, integration, hydraulic pressure control, parameter matching, dynamic response characteristics

Zhaoyong Liu,Yiming Long,Yihang Li,Xiaoqiang Tan,Guangqiang Wu. Study on the Design and Parameter Matching of Integrated Electro-Hydraulic Braking System[J].Automotive Engineering, 2022, 44(9): 1416-1424.

Figures/Tables 17

References 16

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参数	符号	数值
电机额定功率	P_e	960 W
电机最大转速	ω_m	6 000 r/min
电机最大转矩	T_m	4.2 N·m
电缸直径	d_e	22.22 mm
丝杠中径	D	9 mm
丝杠螺距	L	2.7 mm
制动器轮缸直径	d_b	43 mm
踏板制动主缸一腔直径	d₁	20.64 mm
踏板制动主缸二腔直径	d₂	17.14 mm
电流阀最大流量	q₁	0.1 L·（min·bar）^-1
开关阀最大流量	q₂	0.1 L·（min·bar）^-1
制动液体积弹性模量	K_c	1 700 MPa
制动器间隙	δ₀₁	0.5 mm
工作状态高压制动液容积	V	0.4-0.6 L

电驱动转矩T_d /（N·m）	制动器制动力F_b /N	响应时间t /s
4.0	9 198	0.072
3.5	8 226	0.068
3.0	7 283	0.062
2.5	6 359	0.060
2.0	5 302	0.056
1.5	4 066	0.058
1.0	2 938	0.066

额定功率P_e /W	响应时间t /s
480	0.102
600	0.090
720	0.082
840	0.076
960	0.072
1 080	0.070
1 200	0.064
1 320	0.062
1 440	0.060

参数	符号	数值
车辆总质量	m	1 570 kg
制动初始车速	v₀	90 km/h
路面附着系数	μ	1.3
ABS触发滑移率门限	s_t_b	前0.2；后0.2
ABS解除滑移率门限	s_t_e	前0.15；后0.15
制动力分配系数	Ψ_b	0.625
电机驱动转矩	T_d	4 N·m
制动器压强目标	p_a	120 bar

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Study on the Design and Parameter Matching of Integrated Electro-Hydraulic Braking System

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