A New Calculating Method of Pressure Response Time of Pneumatic Brake Pipe Based on Experiments

Gu, Zhiqiang; Hu, Shiyu; Yang, Fan; Yang, Rui; Hua, Jianmin

doi:10.1155/2019/1039474

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Gu et al studied the air pressure response characteristics of the brake pipe through experiments [19]. Chu et al simulated the dynamic characteristics of the pneumatic ABS pressure regulator using Matlab/Simulink, and carried out a hardware-in-the-loop experiment [20].…”

Section: Introductionmentioning

confidence: 99%

Pneumatic ABS Modeling and Failure Mode Analysis of Electromagnetic and Control Valves for Commercial Vehicles

Zhao

Zhou

et al. 2020

Electronics

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A failure of the pneumatic ABS (anti-lock braking system) weakens the braking performance of commercial vehicles. It affects the driving safety of vehicles. There are four typical failure modes that include: the failure of the pilot inlet solenoid valve and pilot exhaust solenoid valve of the pressure regulator, the failure of the series dual-chamber brake valve, and the failure of the relay valve. In order to study the braking performance and the rule of vehicles under the failure modes of the pneumatic ABS, the co-simulation model of the pneumatic ABS of the commercial vehicle was established based on AMESim and Simulink softwares. The gas path subsystem of the pneumatic ABS and the vehicle model were built based on AMESim. The controller was established based on Simulink/Stateflow. The data were transmitted between the AMESim and Simulink software by using the data interface block. The co-simulation model was validated by tests. The results showed that the maximum error of the braking deceleration is 13.51%. The model can simulate the braking process of the vehicle well. Based on this, the four typical failure modes of the pneumatic ABS were simulated, and the influences of different failure modes on the braking ability were analyzed. The influence of failure ratio on braking distance in four modes was obtained. It can be seen from the simulation results that the failure of the pilot inlet solenoid valve and the pilot exhaust solenoid valve of the pressure regulator cause the wheel lock. The failure of the lower chamber of the brake valve and the failure of the relay valve have a great influence on the braking distance.

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Section: Introductionmentioning

confidence: 99%

Pneumatic ABS Modeling and Failure Mode Analysis of Electromagnetic and Control Valves for Commercial Vehicles

Zhao

Zhou

et al. 2020

Electronics

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“…Two authors that constructed experimental set ups to determine the response times of pneumatic circuits were Gu et al (2019) and Yang et al (2017). Like many of the previously discussed authors, their objectives were to validate pneumatic models via experimentation.…”

Section: Pneumatic Brake System Experimental Set-upsmentioning

confidence: 99%

A contribution to the study of heavy haul railway wagon pneumatic braking systems

David Earl

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The pneumatic air brake system in railway trains is critical to the safe and reliable operation of heavy-haul railway transportation. Analysis of the braking performance of the railway wagons often focuses on the behavior and response time of the pneumatic system, consisting of the brake pipe, wagon control valves, wagon brake cylinders, and the wagon air reservoirs. However, for a technology that has been used for centuries and researched for decades in academia, very few architecture or design changes have been introduced to improve the pneumatic air brake system. Two significant design drawbacks of the pneumatic air brake system are slow signal propagation and in series signal passing from wagon to wagon. These drawbacks lead to long stopping distances and, because front wagons begin to brake long before rear wagons, damaging longitudinal shocks between the wagons. While electro-pneumatic brake systems in heavy-haul railway trains are emerging as reliable solutions to the problems faced by purely pneumatic air brake systems, the high cost of implementation and other risk factors have delayed their use in the field. Therefore, purely mechanical, low-cost design solutions are studied in this work. A single design solution has been simulated using mathematical models derived from the Navier-Stokes equations and computationally solved in the C++ programming language to verify system performance. This design solution utilizes a venturi effect to create a vacuum near the outlet of the pneumatic control valve, that enables faster signal propagation through the brake pipe. The faster brake pipe signal was then implemented in a Matlab Simulink longitudinal dynamics model to determine its effect on draft gear couplings. The results indicate that introducing a venturi effect can reduce damage accumulation in the draft gears, at the expense of emergency reservoir air. However, the longitudinal dynamics results require additional study before venturi implementation into the field, as the behavior is not fully controlled and still suffers from similar design flaws as the current system.

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The study of brake force distribution strategy on heavy commercial vehicle between front and rear axles

Valiev,

Khakimov,

Tursunov

et al. 2024

Problems in the Textile and Light Industry in the Context of Integration of Science and Industry and Ways to Solve Them: Ptlici

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A New Calculating Method of Pressure Response Time of Pneumatic Brake Pipe Based on Experiments

Cited by 3 publications

References 11 publications

Pneumatic ABS Modeling and Failure Mode Analysis of Electromagnetic and Control Valves for Commercial Vehicles

Pneumatic ABS Modeling and Failure Mode Analysis of Electromagnetic and Control Valves for Commercial Vehicles

A contribution to the study of heavy haul railway wagon pneumatic braking systems

The study of brake force distribution strategy on heavy commercial vehicle between front and rear axles

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