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  3. Mechanics / Mech Engineering

positionnement en bascule

English translation: in the rocking position

15:44 Jan 11, 2018
French to English translations [PRO]
Tech/Engineering - Mechanics / Mech Engineering / Car engines
French term or phrase: positionnement en bascule
From a training manual on engine valve clearance adjustment:

Les conditions pour le réglage du jeu aux soupapes
Il existe plusieurs méthodes de positionnement du ou des arbres à cames.
Elles diffèrent selon les types de moteurs, les
principales sont les suivantes :
La méthode de la soupape d’échappement en pleine ouverture.
La méthode de **positionnement en bascule**.
La méthode de positionnement par les repères de positionnement d’arbres à cames.
La méthode de positionnement en dos de cames.
Mark Bossanyi
Bulgaria
Local time: 17:03
English translation:in the rocking position
Explanation:
This is the position where both valves are closed, the inlet valve has just closed and the exhaust is about to open.

It is called this because there is no valve spring pressure so the cam can be "rocked", i.e. easily rotated backwards and forwards by a small amount. At least it can on a single cylinder engine, on a multi-cylinder engine, there will be a valve spring on another cylinder that prevents this but the name for the position is still used.
Selected response from:

Terry Richards
France
Local time: 16:03
Grading comment
Great. Thank you!
4 KudoZ points were awarded for this answer



Summary of answers provided
4in the rocking position
Terry Richards


  

Answers


19 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
in the rocking position


Explanation:
This is the position where both valves are closed, the inlet valve has just closed and the exhaust is about to open.

It is called this because there is no valve spring pressure so the cam can be "rocked", i.e. easily rotated backwards and forwards by a small amount. At least it can on a single cylinder engine, on a multi-cylinder engine, there will be a valve spring on another cylinder that prevents this but the name for the position is still used.

Terry Richards
France
Local time: 16:03
Native speaker of: Native in EnglishEnglish
PRO pts in category: 129
Grading comment
Great. Thank you!
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