无压力传感器下的电子液压制动系统轮缸液压力控制
作者:
作者单位:

1.同济大学 汽车学院,上海 201804;2.同济大学 新能源汽车工程中心,上海 201804;3.同济大学 机械工程流动站,上海 201804

作者简介:

熊 璐(1978—),男,教授,博士生导师,工学博士,主要研究方向为车辆系统动力学与控制.E-mail: xiong_lu@tongji.edu.cn

通讯作者:

冷 搏(1991—),男,博士后,工学博士,主要研究方向为车辆系统动力学与控制.E-mail: harrisonleng@gmail.com

基金项目:

国家重点研发计划 (2018YFB0105804)


Wheel-Cylinder Hydraulic Pressure Control of Integrated-Electro-Hydraulic Brake System Without Pressure Sensors
Author:
Affiliation:

1.School of Automotive Studies, Tongji University, Shanghai 201804, China;2.Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China;3.Postdoctoral Station of Mechanical Engineering, Tongji University, Shanghai 201804, China

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    摘要:

    线控电子液压制动系统作为下一代汽车制动系统的主流解决方案,其轮缸液压力控制是实现车辆稳定性控制等主动安全功能的基础。针对四阀结构的集成式电子液压制动系统的成本与冗余问题,提出一种无轮缸压力传感器下的轮缸液压力控制策略。通过台架测试分析液压调节单元的工作特性,提出基于伯努利方程与轮缸PV(pressure volume)特性相结合的轮缸液压力估计方法,设计电磁阀开闭逻辑及基于减压优先的轮缸液压力均衡控制策略,最后通过台架试验进行对比验证。试验结果表明,所提出方法的液压力控制均方根误差在0.21MPa以内,与有液压力传感器方案的控制精度相当。

    Abstract:

    The electro-hydraulic brake-by-wire system is the mainstream solution for next-generation automotive brake systems, whose wheel-cylinder hydraulic pressure control is the basis to achieve active safety functions such as vehicle stability control. In view of the cost and redundancy of the integrated-electronic-hydraulic brake system with a four-valve structure, a wheel-cylinder hydraulic pressure control strategy without pressure sensors is proposed. Through the bench test, the working characteristics of the hydraulic control unit were analyzed. A method for estimating the hydraulic pressure of the wheel cylinder is developed based on the combination of Bernoulli equation and PV characteristics. The solenoid-valve control logic and balance control strategy are designed for wheel-cylinder pressure regulation based on depressurization priority. The experimental results show that the root-mean-square error of the pressure control in this method is within 0.21MPa, which is equivalent to the control accuracy of the scheme with a hydraulic pressure sensor.

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熊璐,杨兴,冷搏,崔天宝,韩伟.无压力传感器下的电子液压制动系统轮缸液压力控制[J].同济大学学报(自然科学版),2020,48(8):1199~1207

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  • 收稿日期:2019-12-25
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  • 在线发布日期: 2020-09-09