MB 300CE C124/300E ja 230E W124, sm. pelle

[itbilen]

See on huvitav märkus. Miks?

Ega ei tea ka täpselt
Äkki seotud just kytuse E85 ja selle gaasidega? Olen päris mitu lennukitehase mootorit laiali v6tnud ja sees on näha nagu mingi must koorik mis sealt siis tykkhaaval eralduma hakkav ja 6likanaleid sulgema kipub. Vastuseks olen kuulnud just seda puudulikku tuulutust. V6ibolla siis ei olnud väga täpne info.
Enda turbomasinaid kasutan ka pikamaalise vaikse s6idu jaoks ja olen ikka tuulutuse eest hoolt kandnud. Ju see ei ole kohustuslik aga usun et pikas persektiivis siiski vajalik.

Välismakeeles siin ka veidi juttu:
However -- and this is where crankcase ventilation comes in -- a certain amount of that mixture of air and gasoline is pulled down by the piston and slips through the piston rings into the crankcase, which is the protective cover that insulates the crankshaft. This escaping gas is called blow-by and it's unavoidable. It's also undesirable because the unburned gasoline in it can gunk up the system and produce problems in the crankcase. Until the early 1960s, these blow-by gases were removed simply by letting air circulate freely through the crankcase, wafting away the gases and venting them as emissions. Then, in the early 1960s, positive crankshaft ventilation (PCV) was invented. This is now considered the beginning of automobile emission control.

Positive crankcase ventilation involves recycling these gases through a valve (called, appropriately, the PCV valve) to the intake manifold, where they're pumped back into the cylinders for another shot at combustion. It isn't always desirable to have these gases in the cylinders because they tend to be mostly air and can make the gas-air mixture in the cylinders a little too lean -- that is, too low on gasoline -- for effective combustion. So the blow-by gases should only be recycled when the car is traveling at slow speeds or idling. Fortunately, when the engine is idling the air pressure in the intake manifold is lower than the air pressure in the crankcase, and it's this lower pressure (which sometimes approaches pure vacuum) that sucks the blow-by gases through the PCV valve and back into the intake. When the engine speeds up, the air pressure in the intake manifold increases and the suction slows down, reducing the amount of blow-by gas recycled to the cylinders. This is good, because the blow-by gases aren't needed when the engine speeds up. In fact, when the car is up to speed, the pressure in the intake manifold can actually become higher than the pressure in the crankcase, potentially forcing the blow-by gases back into the crankcase. Since the whole point of positive crankcase ventilation is to keep these gases out of the crankcase, the PCV valve is designed to close off when this happens and block the backflow of gases.