graissage

English translation: lubrication

21:45 Jan 15, 2019

French to English translations [Non-PRO]
Tech/Engineering - Mechanics / Mech Engineering / motor bikes/ scooters

French term or phrase: graissage

Explanation: Not so much a phrase but a title in a scooter parts catalogue. Carburateur (Depression/graissage/starter tirette)
After having looked up all about carburetors I understand that there are constant depression carburetor types, but I am having trouble with the words graissage / starter tirette, with regards the carburetor, and also since this is in a title above a picture.
Can anyone please help ?

Denise Carter KudoZ activity Questions: 1 (none open) Answers: 0 France
Local time: 14:23

English translation:lubrication

Explanation:
I can't think what else it could possibly be — perhaps your carburettor research will have explained in what way they are lubricated? Do you now if this is taling specifically about 2-strokes? Or 4-strokes... or either?

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Note added at 9 hrs (2019-01-16 07:40:03 GMT)
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Asker: I doubt 'graissage' could ever mean 'pre-jetted' — to start with, the -'age' suffix strongly suggest 'the action of doing something', and Daryo has kindly provided a reference that explains where the lubrication bit might well come into the carburettor; you ought to be able to verify from the rest of your document if this is indeed an auto-lube scooter?
As for 'tirette', I also doubt that would be the actual choke cable... I think asking a separate question might be the safest way to arrive at the right answer...

Selected response from:

Tony M
France
Local time: 14:23

Grading comment

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4 KudoZ points were awarded for this answer

Summary of answers provided

2 +4

lubrication

Tony M

Summary of reference entries provided

Lubrication of two-stroke engines

Daryo

Larousse online

writeaway

Discussion entries: 1

Answers

23 mins confidence:

peer agreement (net): +4

lubrication

Tony M
France
Local time: 14:23
Works in field
Native speaker of:

English
PRO pts in category: 630

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Notes to answerer

Asker: Thanks for the info (new to KudoZ as you can see). No I'm not sure for the strokes, but I think it may mean pre-jetted. And the starter tirette must be the choke cable. So I may have answered myself.

Peer comments on this answer (and responses from the answerer)

agree

Daryo: presumably for a 2-stroke engine where the lubricant is delivered through the carburettor mixed with the fuel.

3 hrs

-> Thanks, Daryo! Ah yes, I see: if instead of pre-mix this is in fact an auto-lube system, then of course the engine lubrication takes place separately via the carb — Asker may be able to confirm this detail.

agree

AkretcheFazia: You are right Tony, I work in the field of oil and gas and this term is very often used.

9 hrs

-> Thanks, A!

agree

writeaway: I don't work in the field but as a car driver and former moped rider, the actual word graissage is more or less everyday French.

11 hrs

-> Thanks, W/A! Yes, it's a common-enough term, and although there is sometimes a risk of a term's being used in a special way, I don't think that is the case in this instance.

agree

B D Finch

14 hrs

-> Thanks, B!

Reference comments

3 hrs peer agreement (net): +1

Reference: Lubrication of two-stroke engines

Reference information:
Lubrication

Most small petrol two-stroke engines cannot be lubricated by oil contained in their crankcase and sump, since the crankcase is being used to pump fuel-air mixture into the cylinder. Over a short period, the constant stream of fuel-air mixture would carry away the lubricating oil into the combustion chamber while thinning the remainder with condensing petrol. Traditionally, the moving parts (both rotating crankshaft and sliding piston) were instead lubricated by a premixed fuel-oil mixture (at a ratio between 16:1 and 100:1). As late as the 1970s, petrol stations would often have a separate pump to deliver such a premix fuel to motorcycles. Even then, in many cases, the rider would carry a bottle of their own two-stroke oil.

Two-stroke oils which became available worldwide in the 1970s are specifically designed to mix with petrol and be burnt in the combustion chamber without leaving undue unburnt oil or ash. This led to a marked reduction in spark plug fouling, which had previously been a factor in two-stroke engines.

More recent two-stroke engines might pump lubrication from a separate tank of two-stroke oil. The supply of this oil is controlled by the throttle position and engine speed. Examples are found in Yamaha's PW80 (Pee-wee), a small, 80cc two-stroke dirt bike designed for young children, and many two-stroke snowmobiles. The technology is referred to as auto-lube. This is still a total-loss system with the oil being burnt the same as in the pre-mix system; however, given that the oil is not properly mixed with the fuel when burned in the combustion chamber, it translates into a slightly more efficient lubrication. This lubrication method also pays dividends in terms of user friendliness by eliminating the user's need to mix the gasoline at every refill, makes the motor much less susceptible to atmospheric conditions (Ambient temperature, elevation) and ensures proper engine lubrication, with less oil at light loads (such as idle) and more oil at high loads (such as full throttle). Some companies, such as Bombardier, had some oil pump designs have no oil injected at idle to reduce smoke levels, as the loading on the engine parts was light enough to not require additional lubrication beyond the low levels that the fuel provides.[12] Ultimately oil injection is still the same as premixed gasoline in that the oil is burnt in the combustion chamber (albeit not as completely as pre-mix) and the gas is still mixed with the oil, although not as thoroughly as in pre-mix. In addition, this method requires extra mechanical parts to pump the oil from the separate tank, to the carburetor or throttle body. In applications where performance, simplicity and/or dry weight are significant considerations, the pre-mix lubrication method is almost always used. For example, a two-stroke engine in a motocross bike pays major consideration to performance, simplicity and weight. Chainsaws and brush cutters must be as light as possible to reduce user fatigue and hazard, especially when used in a professional work environment.

https://en.wikipedia.org/wiki/Two-stroke_engine#Lubrication

Daryo
United Kingdom
Native speaker of:

Serbian,

French
PRO pts in category: 20

10 hrs peer agreement (net): +2

Reference: Larousse online

Reference information:
graissage [grεsaʒ]
nom masculin
automobile & mécanique [avec de l'huile] oiling, lubrication
[avec de la graisse] greasing, lubrication
faire faire un graissage to have one's car lubricated

writeaway
Native speaker of:

English

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