The present invention relates to an apparatus for recycling the exhaust gas of the engine crankcase of a car which filtrates the exhaust gas of the engine crankcase permitting the filtrated gas to be further guided into the engine of the car for burning.
During the operation of the engine of a car, fuel mixture may partially leak out of the combustion chamber to the engine crankcase through the gap between the piston ring and the cylinder wall of the engine. Leaked fuel mixture mixed with exhaust gas of the engine crankcase must be properly treated otherwise it will pollute the air. Various economizers have been disclosed to collect the exhaust gas of the engine crankcase for recycling. The positive crankcase ventilating system (PCV system) is one of the most commonly used systems for recycling the exhaust gas of the engine crankcase. However, the PCV system cannot completely recycle the exhaust gas of the engine crankcase and partial exhaust gas will come out of the engine crankcase to pollute the air. Beside this Carbon will be precipitated on the inside wall of the engine crankcase when engine gas is retained in the hot engine crankcase, causing the air and oil holes of the engine blocked or partially blocked, and therefore the service life of the engine will be greatly shortened. Furthermore, when the speed of the car is reducing or the car is stopped while the engine is operating at a high speed, the throttle valve is closed, causing a high negative pressure produced at the intake manifold of the engine. Under this stage, the suction force of the high negative pressure will stop the valve of the PCV system, causing the cylinder of the engine unable to obtain sufficient air for combustion, and therefore carbon monoxide will instantly increase.