Development and experimental validation of an automatic parking brake system with less driveline sensor

作     者：WANG JunNian SUN NaNa YAN JiaWei SONG DaFeng WANG QingNian 

作者机构：State Key Laboratory of Automotive Simulation and Control Jilin University Chassis Systems Control Division Bosch Automotive Products (Suzhou) Co. Ltd. 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2018年第61卷第11期

页      面：1628-1641页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.51875235) the 2018 "13th Five-Year" Scientific Research Planning Project of the Education Department of Jilin Province(Grant No.JJKH20180135KJ) the 2018 Jilin Province Science and Technology Development Plan-International Science and Technology Cooperation Project(Grant No.20180414011GH) 

主　　题：automatic parking brake mass estimation hill-start assist releasing time drive-off tilt angle redundant design 

摘      要：Electrical Parking Brake(EPB) has been popularly used in passenger cars over the past ten years. With the help of the several kinds of sensors mounted in driveline for the total traction force estimation, EPB can obtain well performance on drive-off assistance and automatic parking brake. Furthermore, its AUTOHOLD function can realize automatic parking brake and ease the driver. However, given that the higher cost and complexity of this traction force estimation method based on the driveline sensors and its slower response resulted by applying maximum parking force for safety parking while driving off, a novel automatic parking brake system without these transmission system sensors, such as clutch position sensor for the cars with manual transmission, is proposed in this paper, including its control scheme and application test. Firstly, the indirect judgement method of the appropriate moment to release the parking brake, which is based on the car pitch moment when it drives off, is introduced according to the force analysis when the car is ready to go. Then a pragmatic mass estimation method for proper brake force calculation is proposed for improving the drive-off performance. In addition, for the convenience and drivability of skillful driver, as well as the system reliability, a mechanical redundant design to reserve the conventional handbrake lever is also described. Finally, various simulations based on CarSim software and road tests are performed to validate its effectiveness.