Counter-pressure brake


Counter-pressure brake

The counter-pressure brake (German: Gegendruckbremse), also named the Riggenbach counter-pressure brake after its inventor, Niklaus Riggenbach, is a dynamic railway brake on steam locomotives that, through a combination of means, brakes the locomotive in the driving cylinders. In doing so it prevents wear and tear and overheating of the driving wheel tyres and brake blocks and enables a continuously high brake force to be applied. The brake works by using the cylinders as air compressors and converting kinetic energy into heat. Steam is emitted during braking but this does not come from the boiler. It is produced by evaporation of water, which is used to cool the cylinders.

Contents

Use

Austria and Germany

Counter-pressure brakes were found especially on steam engines that worked long inclines and on rack railway locomotives (e.g. on the Vienna Kahlenberg Railway (Kahlenbergbahn), relieving brake blocks and tyres from high levels of wear and tear that they would otherwise be subjected to[1].

For operation on ramps its availability was indispensable because these dynamic brakes on steam locomotives provided the required third independent set of brakes.

A further area of use was in measurement and testing on braking locomotives to provide continuous braking on railway vehicles being tested in normal running. Here a number of steam engines survived in this niche activity in Germany until the middle of the 1970s.

Wales

Counter-pressure brakes are used on the steam locomotives of the Snowdon Mountain Railway.

Countersteam brake

The counter-pressure brake should not be confused with the countersteam brake (German:Gegendampfbremse), which cannot be used as an auxiliary braking system.

References

  1. ^ Ransome-Wallis, P. (1959). Illustrated Encyclopedia of World Railway Locomotives (2001 republication ed.). Dover Publications, Inc. ISBN 0-486-41247-4. , p. 251.

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Emergency brake (train) — This article is about emergency brakes on trains. For emergency brakes in cars, see hand brake. Driver s brake handle in a UK Electric Multiple Unit On trains, the expression emergency brake has several meanings: The maximum brake force available …   Wikipedia

  • Railway air brake — Piping diagram from 1920 of a Westinghouse E T Air Brake system on a locomotive …   Wikipedia

  • Railway brake — A traditional clasp brake: the brake shoe (brown) bears on the surface (tyre) of the wheel (red), and is operated by the levers (grey) on the left …   Wikipedia

  • New York Air Brake — NYAB redirects here. For other uses, see NYAB (disambiguation). New York Air Brake Type Privately Held Company Founded 1890 Headquarters Watertown, New York USA …   Wikipedia

  • Countersteam brake — A countersteam brake is a brake on a steam locomotive that uses the engine (specifically the cylinders) to help brake the locomotive. It uses the working principle of steam cylinders fitted with slide or piston valves such that, by changing the… …   Wikipedia

  • Mean effective pressure — The mean effective pressure is a quantity related to the operation of an reciprocating engine and is a valuable measure of an engine s capacity to do work that is independent of engine displacement[1]. When quoted as an indicated mean effective… …   Wikipedia

  • Bicycle brake — Animation of a single pivot side pull calliper brake for the rear wheel of a steel framed road bike. A bicycle brake is used to slow down or stop a bicycle. There have been various types of brake used throughout history, and several are still in… …   Wikipedia

  • Bavarian Gt 2x4/4 — Model of the Bavarian Gt 2x4/4 by Märklin, Göppingen Bavarian Gt 2×4/4 DRG Class 960 DR Class 960 Number(s): K.Bay.Sts.B.: 5751–5765 DRG: 96 001–95 015 …   Wikipedia

  • DRG Class 44 — Quantity: 1,989 Year(s) of manufacture: 1926–1949 Wheel arrangement: 2 10 0 Axle arrangement …   Wikipedia

  • Saxon XX HV — Infobox German Railway Vehicle Farbe1=698B69 Farbe2 Baureihe=Saxon XX HV DRG Class 19.0 Abbildung=Dampflokomotive 19 017 Chemnitz Hilbersdorf.jpg Name=Dampflokomotive 19 017 im Eisenbahnmuseum Chemnitz Hilbersdorf 24. August 2002… …   Wikipedia