Neperskaitytas pranešimas
Shadowed » 2016 11 09, 08:29
Dar pacituosiu tekstą iš aukščiau minėto puslapio (ne vienintelis toks puslapis, kuris taip aprašo PCV darbą):
At an idle, engine speed is low, around 600 RPM. A relatively small amount of fuel and air travel through the intake at idle speed. If the PCV valve did not regulate air flow, the engine would act like it had a vacuum leak. Too much air flowing into the intake causes the engine to lean out [too much air in relation to the fuel] and misfire. At an idle, the PCV valve restricts air flow, to reduce this problem. At high manifold vacuum [idle], a spring loaded valve is drawn up and partially restricts flow to the crankcase. The first drawing above illustrates the PCV valve position at idle.
On acceleration far more fuel and air move through the engine and intake manifold vacuum is much lower. Air introduced by the PCV valve has much less influence on the fuel-air mixture. Low intake manifold vacuum allows the valve to move to a more central position. In this position the system draws more fumes from the crankcase. The additional flow is very beneficial, without affecting engine performance. The center illustration above, shows the PCV valve in acceleration position.
Any pressure in the intake causes flow in the opposite direction. This could occur during an engine backfire or if the engine is turbo-charged. The PCV valve can act as a check-valve in these situations. By closing the PCV valve, any positive pressure or fuel vapor is prevented from entering the crankcase. Even a very small amount of positive pressure can force oil passed gaskets and seals and blow gaskets out of place. Failure of the valve to seal positive pressure may damage the engine.
Vertikaliai dirba lygiai taip, kaip aprašyta. Dėl procedūros viskas gerai, juk ne garaže dirbu, visi mūsų spec laboratorijos technikai prisijungė prie šito bandymo atlikimo. Jaučiu šitą klausimą reiks priskirti prie religinių - vieni tiki kad yra dievas, kiti - kad Senelis Šaltis, treti, kad PCV belekaip dirba...
