Forced crankcase ventilation system (Mazda Capella GF)

1. Crankcase ventilation system (figure 16.1) reduces hydrocarbon emissions by directing crankcase gases into the engine combustion chambers for afterburning. Fresh air from the air cleaner is directed into the crankcase, where it mixes with crankcase gases and is then directed through the valve into the intake manifold.



2. The ventilation system includes: a ventilation valve, an oil separator filter, and hoses connecting these elements to each other and to the intake manifold.

3. At idle speed, when the vacuum in the intake manifold is high, the ventilation valve blocks the flow of gases. When the piston tracks wear out, when a large amount of gases breaks into the crankcase and the pressure in it increases, the ventilation system directs the excess gases to the air cleaner. from where they again enter the combustion chambers.

4. Checking and replacing the valve in the ventilation is described in chapter 1.

(The article is based on website data: «MazBook.ru»)