Vehicle Engineering (VE), Volume 3, 2015 www.seipub.org/ve doi: 10.14355/ve.2015.03.001
Development of Test Set for Tire Failure Emergency Braking System Qingzhang Chen*1, Jonathan M. Weaver2, Wei Wang1 1 College of Mechanical Engineering, Automotive Engineering, Changshu Institute of Technology, Suzhou, China 2 College of Engineering &Science, Mechanical Engineering, University of Detroit Mercy, Detroit, USA *1
chenqz1973@sina.com; 2jmweaver@udmercy.edu; 3wangwei@cslg.edu.cn
Abstract To develop tire blowout emergency braking system, one of the key problems is the test method for system calibration. By simulating the process of tire blowout, and transmitting the tire failure signal to the system, the test set carries out every performance experiments, so that the control strategy and the control value can be adjusted according to test results. After developing the tire blowout emergency braking system, we designed the tire blowout simulating device, which can release tire pressure with big flow by controlling a small flow, so that the problem of simulating big flow of tire blowout repeatedly was solved. With this device, we also can simulate the different intensity of tire blowout. The whole test system was built, and the road test was carried out. The results show that the test system can be used to develop the relative emergency braking system, and achieve the experiment of system calibration and performance evaluation. Keywords Vehicle; Emergency Braking System; Device for Tire Blowout Simulation; Test Set; Design
Introduction Tire failure is one of the main factors which cause the fatal traffic accidents. Currently, the Tire Pressure Monitoring System (TPMS) is popularly equipped on vehicles to prevent low tire pressure and avoid tire failure accidents. But it can only remind the driver for slowly tire pressure failure(Fu Jianzhong, et al. ,2006; Xu Lina, et al., 2009). For the situation of urgently tire blow‐out, the characteristics of vehicle motion will be changed after tire blow‐out. It’s easy to cause the driver’s rush irritability operation, once the driver operating improperly, the vehicle will be severely side slipped, drifted, and even overturned(Patwardhan S, et al., 1994; Zbigniew Lozia, et al. 2005; Dang Lu, et al. 2010.). So it is useful to develop an emergency braking system to slow down the velocity of vehicle automatically and smoothly(Qingzhang Chen, 2011; Huang Jiang, et al., 2009) A tire blow‐out emergency automatic braking system can slow down the vehicle automatically into a safety speed and stop the vehicle before it going out of the driver’s control. But during the development and the performance evaluation of the system, how to deal with the relative test, and simulate the process of tire blow‐out are the key problems. The thesis is concerning of the design of tire blow‐out test set system. The Scheme of the System System Hardware Principle The emergency braking system (EBS) for tire blow‐out includes the tire blow‐out monitoring module and automotive braking module. The monitoring module is extended on the TPMS, which is used to identify the tire failure. Once the tire blow‐out happening, the tire failure signal is transmitted by the monitoring module to the emergency braking system through radio frequency identification (RFID). When the tire blow‐out signal is received by EBS, it will determine the braking mode according to the situation of tire failure to slow down the vehicle to a safe speed with expected track in shortest time. The braking and vehicle stability control is realized through adjusting the hydraulic braking pressure of each wheel cylinder.
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