Pressure control scheme for air brakes in commercial vehicles

Abstract

This research is focused on developing a control scheme for regulating the pressure in the brake chamber of an air brake system found in most commercial vehicles like trucks, tractor-trailers and buses. Such a control scheme can be used for providing the ground work for future systems such as forward collision avoidance systems, advanced anti-lock brake systems and differential braking systems. The development of this controller involves two tasks. The first task was the development of a control scheme for achieving the desired pressure in the brake chamber. This scheme was based on a mathematical model of the treadle valve of the air brake system. The second task was the implementation of this control scheme on the experimental facility that was set up at Texas A&M

Pneumatic electronic braking assistance system using high-speed valves

“…If the driver presses the brake pedal on the treadle valve, the three high-speed valves II, 13 and 15 power off. At the moment, the brake system is under the driver control mode.…”

“…According to the properties of air flow through the nozzle, the mass flow equation can be described as (5) [11]- [13].…”

A Diagnostic System for Air Brakes in Commercial Vehicles

“…The model for the pressure transients presented in this chapter has been used to develop a control scheme for regulating the pressure in the brake chamber. This scheme has been implemented on the experimental setup to track a variety of desired pressure trajectories and the results are presented in [86]. A schematic representation of this control scheme is provided in Fig.…”

Modelling and control design for an electro-pneumatic braking system in trains with multiple locomotives

“…A mathematical model of an electro-pneumatic brake system was developed for commercial vehicles which can be used towards model-based control and fault diagnosis of the electro-pneumatic brake (Karthikeyan, Siva Chaitanya et al 2011). A control scheme for regulating the pressure of air in a brake chamber of these brake systems was presented in (Bowlin, Subramanian et al 2006). Subramanian, et al developed a fault-free model of the pneumatic subsystem in an air brake system used in commercial vehicles.…”