TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

RELEASE BRAKES [12 records]

Record 1 2024-02-07

English

Subject field(s)
  • Braking Devices (Mechanical Components)
  • Railroad Safety
  • Rolling Stock (Railroads)
CONT

... "brake indicator device" means any device used to indicate the application and release of the brakes when the piston is not visible.

French

Domaine(s)
  • Freins (Composants mécaniques)
  • Sécurité (Transport par rail)
  • Matériel roulant (Chemins de fer)
CONT

«indicateur de freinage» : tout dispositif servant à indiquer le serrage et le desserrage des freins lorsque le piston n'est pas visible [...]

Spanish

Save record 1

Record 2 2023-08-04

English

Subject field(s)
  • Braking Devices (Mechanical Components)
  • Rolling Stock (Railroads)
DEF

A cylinder located at the junction of the pneumatic and mechanical elements of the air brake system.

OBS

It contains a piston which is forced outward by compressed air when the brakes are applied and returned by a release spring when the brakes are released.

French

Domaine(s)
  • Freins (Composants mécaniques)
  • Matériel roulant (Chemins de fer)
DEF

Organe qui réalise la jonction entre les éléments pneumatiques et mécaniques du système de frein à air.

OBS

Son alimentation en air comprimé, ou sa vidange, provoque le mouvement de la timonerie dans le sens du serrage ou du desserrage des freins.

Spanish

Campo(s) temático(s)
  • Frenos (Componentes mecánicos)
  • Equipo rodante (Ferrocarriles)
Save record 2

Record 3 2018-09-14

English

Subject field(s)
  • Rail Transport Operations
  • Railroad Safety
CONT

While setting off the cars at Maxville, the conductor closed the angle cocks on the adjoining ends of the cars to be separated and did not vent the air, leaving the air brake line charged on the 74 cars left unattended on the main line. This practice is known in the industry as "bottling the air. "During a train service brake application, the head-end air brake pipe pressure is reduced below the tail-end air brake pipe pressure, creating a pressure differential. When the angle cock on a car is closed before the air pressure equalizes in the brake pipe, a pressure wave is created. This wave can initiate a brake release on the car, which will then cause the brakes to release on subsequent cars.

French

Domaine(s)
  • Exploitation (Transport par rail)
  • Sécurité (Transport par rail)
OBS

Cette pratique peut déclencher le desserrage du frein à air.

Spanish

Campo(s) temático(s)
  • Explotación (Transporte ferroviario)
  • Seguridad (Transporte ferroviario)
Save record 3

Record 4 2017-10-25

English

Subject field(s)
  • Cycling
DEF

A lever used on a wheel hub, and sometimes a seatpost, that replaces the locknut for easy, no-tool removal or adjustment.

OBS

This system is most commonly found at the wheels hubs, replacing axle nuts for fastening the front or back wheels to the front or rear dropouts and allowing rapid removal and replacement of the wheel in case of a flat tire without the need for tools, by turning the lever through 180°. The system is also found at the top of the seat tube for clamping the seatpost into the seat tube and allowing the rider to raise and lower the seat while mounted. The levered quick release system may also be present at the front and rear brakes, this time as an adjustment lever that causes the caliper arms to spread, thereby allowing the wheel to be removed without deflating the tires.

OBS

"Quick release" is sometimes used to designate the lever rather than the system.

PHR

tighten a quick release

Key term(s)
  • quick-release levers

French

Domaine(s)
  • Cyclisme
DEF

Levier de métal incurvé que l'on manœuvre à la main pour déclencher un système de blocage rapide.

CONT

[...] sur la roue arrière, la manette du blocage doit être montée du côté opposé au dérailleur, donc du côté gauche de la bicyclette. Par symétrie, la manette du blocage de la roue avant se place aussi du côté gauche de la roue.

OBS

Ce système effectue le serrage et le desserrage rapide des diverses parties de la bicyclette. L'emploi le plus fréquent de ce système, conçu pour opérer un changement de roue dans un minimum de temps, est le blocage de la roue dans les encoches des pattes de la fourche, remplaçant les papillons et les écrous. Le système peut aussi effectuer le serrage de la tige de selle dans le tube de selle pour que le cycliste puisse monter et descendre la selle en roulant. Finalement, la plupart des freins à tirage latéral sont équipés d'un tel système qui facilite, en cas de roue voilée, le passage de la roue en écartant les deux mâchoires du frein sans dégonfler le pneu ou le boyau.

PHR

bloquer une ailette

Key term(s)
  • leviers de blocage rapides

Spanish

Campo(s) temático(s)
  • Ciclismo
PHR

cerrar una aleta

Save record 4

Record 5 2017-04-13

English

Subject field(s)
  • Rolling and Suspension Components (Railroad)
  • Traction (Rail)
  • Braking Devices (Mechanical Components)
DEF

[A] valve that controls the application and release of brakes in accordance with automatic brake valve handle manipulation.

OBS

It is the heart of the service portion.

French

Domaine(s)
  • Roulement et suspension (Chemins de fer)
  • Traction (Chemins de fer)
  • Freins (Composants mécaniques)
DEF

Valve que exécute les serrages et les desserrages du frein automatique.

OBS

C'est le cœur du module de commande de frein automatique.

Spanish

Save record 5

Record 6 2016-02-15

English

Subject field(s)
  • Braking Devices (Mechanical Components)
  • Rolling Stock (Railroads)
CONT

The automatic brake valve controls the application and release of both the locomotive and the train brakes. [It] is a self-lapping, pressure-maintaining valve.

French

Domaine(s)
  • Freins (Composants mécaniques)
  • Matériel roulant (Chemins de fer)
DEF

Organe de commande de freinage du train, pouvant occuper diverses positions pour alimenter la conduite générale en air comprimé et permettre ainsi le desserrage des freins, ou, au contraire, la vider plus ou moins pour provoquer le serrage.

Spanish

Save record 6

Record 7 2011-03-17

English

Subject field(s)
  • Rolling and Suspension Components (Railroad)
  • Special-Language Phraseology
CONT

Sticking brakes occur when brakes on a car(s) remain applied after a train brake release. When sticking brakes occur : a) Stop the train as soon as possible. b) Determine why the brakes are sticking. Possible causes for sticking brakes include : Overcharged air brake system. Hand brakes applied. Retaining valve not in EXHAUST position. Leak in the air brake system. Placing the automatic brake handle in the release position while the brake pipe reduction is still exhausting. An insufficient brake pipe reduction to ensure proper release.

CONT

The RTC Mech [Rail Traffic Control Mechanical Service Representatives] positions were established in response to a study group which examined “Why Wheels Fail.” As part of this study, it was determined that proactive monitoring and action might prevent wheel failures associated with sticking brakes.

Key term(s)
  • sticking brakes

French

Domaine(s)
  • Roulement et suspension (Chemins de fer)
  • Phraséologie des langues de spécialité
CONT

Les étincelles provoquées par un train aux freins bloqués ont allumé plusieurs feux à Hauterive (NE). […] Le feu s'est déclaré en plusieurs endroits [...] après le passage d'un train marchandises [...]. À cause d'un frein bloqué, le convoi a provoqué des étincelles qui ont bouté le feu à une haie de thuyas et à des branches.

CONT

L’établissement des postes de CCFM [Contrôleurs de la circulation ferroviaire – Mécanique] a fait suite aux travaux d’un groupe d’étude qui a examiné les raisons de la rupture des roues. Dans le cadre de cette étude, on a déterminé qu’une surveillance et des mesures proactives pourraient prévenir les ruptures de roues associées au blocage des freins.

Key term(s)
  • blocage de freins
  • freins bloqués
  • coincement de freins
  • frein coincé
  • freins coincés
  • freins qui collent
  • frein collé
  • freins collés

Spanish

Save record 7

Record 8 2008-10-22

English

Subject field(s)
  • Taps and Plumbing Accessories
  • Aircraft Systems
DEF

A valve which controls pressure, volume, or flow direction in a fluid transmission system.

CONT

Pneumatic systems are often compared to hydraulic systems, but such comparisons can only hold true in general terms.... Control valves are... a necessary part of a typical pneumatic system.... The control valve consists of a lever with two lobes. [In the off position], a spring holds the left poppet closed so that compressed air entering the pressure port cannot flow to the brakes. [In the on position], one lobe of the lever holds the left poppet open and a spring closes the right poppet. Compressed air now flows around the opened left poppet, through a drilled passage, and into a chamber below the right poppet. Since the right poppet is closed, the high-pressure air flows out of the brake port and into the brake line to apply the brakes. To release the brakes, the control valve is returned to the off position.

French

Domaine(s)
  • Robinetterie et accessoires
  • Circuits des aéronefs
DEF

Vanne qui contrôle la pression, le volume, la direction du débit dans un circuit de transmission de fluide.

OBS

vanne de commande : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

PHR

Vanne de commande de débit, de décharge, de démarrage, de pression, d'ouverture de trappe de train principal.

Spanish

Save record 8

Record 9 2008-07-24

English

Subject field(s)
  • Road Safety
  • Police
DEF

A braking skid mark which is interrupted by the release and reapplication of the brakes.

Key term(s)
  • intermittent skidmark

French

Domaine(s)
  • Sécurité routière
  • Police
DEF

Trace de pneu discontinue laissée sur la chaussée par une roue dont le frein est actionné, relâché puis actionné de nouveau.

OBS

défreinage : Action de relâcher la pression exercée sur les freins.

Spanish

Save record 9

Record 10 1993-07-02

English

Subject field(s)
  • Closing Devices and Nozzles (Mechanical Components)
  • Rolling Stock (Railroads)
  • Braking Devices (Mechanical Components)
DEF

Valve that prevents a premature release of the brakes by preventing the charging of the equalizing reservoir after a penalty application until the automatic brake handle is moved to the release position.

French

Domaine(s)
  • Obturateurs et buses (Composants mécaniques)
  • Matériel roulant (Chemins de fer)
  • Freins (Composants mécaniques)
DEF

Valve qui empêche un desserrage prématuré des freins en rendant impossible le remplissage du réservoir d'égalisation tant que le robinet de mécanicien n'est pas ramené en position de desserrage.

Spanish

Save record 10

Record 11 1993-06-30

English

Subject field(s)
  • Closing Devices and Nozzles (Mechanical Components)
  • Rolling Stock (Railroads)
  • Braking Devices (Mechanical Components)
DEF

Valve that does not function in normal service; it prevents the unintentional release of the brakes due to an excessive leakage from the suppression valve in 26-C automatic brake valve or 30A-CDW brake valve.

French

Domaine(s)
  • Obturateurs et buses (Composants mécaniques)
  • Matériel roulant (Chemins de fer)
  • Freins (Composants mécaniques)
DEF

Clapet qui n'intervient pas en temps normal; ce n'est qu'en cas de fuite importante provenant de la valve de suppression du robinet de mécanicien 26-C ou du robinet de frein 30A-CDW que ce clapet de retenue entre en action pour prévenir un desserrage intempestif des freins.

Spanish

Save record 11

Record 12 1992-03-12

English

Subject field(s)
  • Braking Devices (Mechanical Components)
OBS

Speeds up the application and release of service brakes. Sometimes also used to speed up the operation of spring brakes.

French

Domaine(s)
  • Freins (Composants mécaniques)
OBS

frein à air comprimé

Spanish

Save record 12

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: