Re: Re: engine breather filter

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#14092
Michael
Participant

Hahaha !
Thank you KK !
It is tested since more than 20 years and it works very well.

Just to go back to what it is, the engine breather at all.

With every rev of the crankshaft of our engines it must compensate a volume / displacement difference of 750 cm³.

Ok, there is the possibility to compress air to a certain amount, but it needs energy to do so. (Compare to compressor energy demand to get a number). An open vented system reduces this energy loss significantly.

There is a lot of fresh air going into the crankcase that needs to be filtered (while pistons going up), but there is the same amount of hot air and oil mist coming out there (while pistons going down).

Ok, there will be a certain difference / interference, some kind of “swing”, related to varying engine revs and frequencies.

Having the filter right above the engine breather “bell”, it is easy to install, but a bit to large filter body or to less space for it.

It will filter the “inhale” of the engine, avoiding dust and debris to enter the engine. But it doesn’t work very well (oil mist exiting) when the engine “exhales”.

Water is a different issue !
It may and will enter and leave the crankcase throught the “ventilation” system.
Let’s discuss this later on.

Cheers, Michael


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