FUNCTION
By introducing blow-by gas that has a large amount of HC into the intake manifold for combustion, the system prevents the blow-by gas from being discharged into the atmosphere.
The generated blow-by gas is separated from the engine oil using the oil separator and flows to the pressure control valve. The blow-by gas is drawn into the intake pipe from the pressure control valve and burned in each cylinder. For details of the oil separator and pressure control valve, see the 2WW Engine Mechanical section.