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| node: | 07.07.2015-11:30:08 |
| template: | 4 |
| parent: | MOTORBIKES - alebo vsetko o motorkach a tak dalej |
| owner: | blba zena |
| viewed by: | |
| created: | 07.07.2015 - 11:30:08 |
| updated: | 07.07.2015 - 11:33:37 |
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cwbe coordinatez: 101 1 772375 7954429 ABSOLUT KYBERIA |
| permissions | |
| you: | r, |
| system: | public |
| net: | yes |
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V Autolume (Lamac) mi poradili, ze vraj mozem liat do mojho 2T skutra (Gilera 125) aj 4T olej. Ten by sa mi oplatil, lebo by som mohla zdielat 4l olej, ktory zivi motorku, a lebo kupujem lepsie oleje ako 2T do kosaciek. Tvrdili mi, ze 4T je rovnako dobry.
Co vsak citam na nete, je tam rozdiel v tom ako sa tie oleje spaluju a naopak, ze maju uplne ine specifikacie, kvoli sposobu akym sa ten olej pouziva.
I have 3 questions: 1. Why do we need to use 2T oil in a two stroke engine? 2. What will happen if we use 4T oil instead of 2T oil? 3. How does 2T oil lubricate the engine (Before or after burning)?
A. Dear Mr. Kumar, 2-stroke oil has a very short working life, straight in and out, and it gets burnt. The 2-stroke engine doesn’t have a sump full of oil and the bearings are all rollers, so there’s hardly any oil drag, hence no need for multigrades. Long term stability is obviously not a problem! But, 2-stroke must burn off without leaving any plug-fouling or detonation-initiating deposits. The detergent and anti-wear additives used in 4-stroke oil leave hard white ash behind when they burn, just what you do not need in a 2-stroke. So 2-stroke oils use low-ash detergents and dispersants, and the better types use ester synthetics to act as anti-wear compounds. With current environmental concerns, smoke is a sensitive issue, so most ‘road’ 2-stroke oils are now low smoke, which requires yet another type of synthetic base designed to burn off invisibly. For some rather basic but very high-revving air-cooled racing 2-strokes there’s still some sense in using blends with that marvellous anti-seize liquid, castor oil!Due to crankcase induction and compression, the classical 2-stroke obviously cannot have an oil-filled sump, so the only way to keep an oil film on anything was to add oil to the fuel, or inject oil into the crankcase space where it could mix with the fuel vapour. There are now some engines where the fuel and oil are injected separately, but the oil is still burnt. Hope this answers your question.
[ http://www.fuchslubricants.com/previously-asked-questions ]
Akoze WTF? Neviem co si mysliet teraz, takze skusenost/informacia pomoze.
Co vsak citam na nete, je tam rozdiel v tom ako sa tie oleje spaluju a naopak, ze maju uplne ine specifikacie, kvoli sposobu akym sa ten olej pouziva.
I have 3 questions: 1. Why do we need to use 2T oil in a two stroke engine? 2. What will happen if we use 4T oil instead of 2T oil? 3. How does 2T oil lubricate the engine (Before or after burning)?
A. Dear Mr. Kumar, 2-stroke oil has a very short working life, straight in and out, and it gets burnt. The 2-stroke engine doesn’t have a sump full of oil and the bearings are all rollers, so there’s hardly any oil drag, hence no need for multigrades. Long term stability is obviously not a problem! But, 2-stroke must burn off without leaving any plug-fouling or detonation-initiating deposits. The detergent and anti-wear additives used in 4-stroke oil leave hard white ash behind when they burn, just what you do not need in a 2-stroke. So 2-stroke oils use low-ash detergents and dispersants, and the better types use ester synthetics to act as anti-wear compounds. With current environmental concerns, smoke is a sensitive issue, so most ‘road’ 2-stroke oils are now low smoke, which requires yet another type of synthetic base designed to burn off invisibly. For some rather basic but very high-revving air-cooled racing 2-strokes there’s still some sense in using blends with that marvellous anti-seize liquid, castor oil!Due to crankcase induction and compression, the classical 2-stroke obviously cannot have an oil-filled sump, so the only way to keep an oil film on anything was to add oil to the fuel, or inject oil into the crankcase space where it could mix with the fuel vapour. There are now some engines where the fuel and oil are injected separately, but the oil is still burnt. Hope this answers your question.
[ http://www.fuchslubricants.com/previously-asked-questions ]
Akoze WTF? Neviem co si mysliet teraz, takze skusenost/informacia pomoze.