Abstract
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.
Highlights
The pneumatic Anti‐Lock Braking System (ABS) is widely used in trucks, buses, and other commercial vehicles
The simulation results corresponding to the different failure ratios of the four failure modes the pilot inlet and exhaust solenoid valves of the ABS pressure regulator led the wheel to be arelocked
The purpose of this paper is to investigate the dynamic response characteristics and failure characteristics of typical ABS failure modes, and to analyze the effects of failure modes on vehicle braking performance
Summary
The pneumatic ABS (anti-lock braking system) is widely used in trucks, buses, and other commercial vehicles. Chen established a co-simulation model of pneumatic ABS based on TruckSim, Simulink, and AMESim. The control input variable was the air pressure of the brake chamber, and the output was the displacement of the brake pedal. Zhao et al established a sliding mode control model of the regenerative braking system equipped with the pneumatic ABS for buses [14]. Zhang built a total model including air tanks, brake valves, relay valve, ABS pressure regulators, and brake chambers in simulation software MWworks based on Modelica programming language [23]. Yang et al studied the failure causes of the pneumatic ABS pressure regulator of electric buses, and extended its service life by optimizing the structural design of the solenoid valve [30]. Valve of the ABS pressure regulator, the failure of the series dual-chamber brake valve, and the failure of the relay valve, are analyzed
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