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Brake control valve arrangement

A braking system, emergency braking technology, applied in the direction of brake transmission, brake control system, control valve and bleed valve, etc.

Active Publication Date: 2021-04-23
KNORR BREMSE SYST FUR SCHIENENFAHRZEUGE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such systems, not yet commercialized, suffer from similar problems

Method used

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  • Brake control valve arrangement
  • Brake control valve arrangement

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Experimental program
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Embodiment Construction

[0012] In order to allow deceleration control of pneumatic braking (emergency and service brakes), the available braking force must be set at a level higher than that derived from the brake specification to allow Increase braking force to compensate for any reduction in braking force caused by mechanical components of the braking system, including brake pads. Depending on the control algorithm, the reduction in braking force may be train-wide or segment-wide. Likewise, deceleration control may require a reduction in braking force, and thus applied brake pressure, to counteract any excess braking caused by the mechanical properties of the braking system.

[0013] figure 1 A pneumatic schematic diagram of a brake valve arrangement is shown, comprising a manifold 1 receiving service brake supply pressure 2 and providing a pneumatic connection to brake cylinders 3 , 4 . This manifold provides further pneumatic connections from optional external load connections 5 and distributio...

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PUM

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Abstract

The invention relates to an electropneumatic rail brake system configured to provide emergency braking comprising an emergency magnet valve (19) which controls air flow into an emergency regulator valve (15), which valve has an emergency back-up chamber. The emergency regulator provides an output pressure nominally equal to the variable load pressure and no lower than the tare back-up. The magnet valve (19) is closed when energised and when de-energised, and pressure is allowed into the emergency back-up chamber. Regulation of the brake cylinder pressure continues during an emergency application such that the brake cylinder pressure applied during an emergency stop does not drop below a predetermined level. In the event of power-loss during an emergency brake stop, the nominal emergency brake pressure is applied to the brake cylinders.

Description

technical field [0001] The present invention relates to an electropneumatic brake system for rail vehicles for use in a rail vehicle brake system, and in particular to a vent valve arrangement for use in remote release and emergency braking functions. Background technique [0002] In known systems such as those disclosed in EP1588913 and GB2359599, the available pneumatic braking force is set such that the braking force required to support maximum deceleration of the vehicle with its current load is available and this can be applied to the brake cylinders. Braking force to provide a full pneumatic emergency braking stop. During service braking, the applied brake pressure (i.e. brake The pressure in the cylinder) is adjusted to a level lower than the available pressure. [0003] The system has been field proven, but is subject to changes in brake pad friction that may occur during brake application and may cause brake actuation on any bogie to produce braking forces differe...

Claims

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Application Information

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IPC IPC(8): B60T13/66B60T13/68B60T8/18B60T15/20B60T8/17B60T8/32
CPCB60T8/1705B60T8/1893B60T8/3235B60T13/665B60T13/683B60T15/20B60Y2200/30B60Y2400/81B60T8/94B60T15/021B60T15/027B60T17/221B60T2270/402B60T2270/413B60T2270/88
Inventor N·安斯泰B·德雷特M·亨明斯J·皮尔
Owner KNORR BREMSE SYST FUR SCHIENENFAHRZEUGE GMBH