| 摘要 |
A flow-controlled engine ventilation system recovers blow-by gases and lower vapor pressure hydrocarbons. In an internal combustion engine, blow-by gases generated by the internal combustion process are ventilated from the crankcase through a recovery filter (10). The recovery filter (10) has an expansion chamber (20) allowing the blow-by gases to evenly distribute themselves before flowing past the filtration medium (14). The filtration medium (14) has a large surface area and is preferably oil-soaked copper wool. A compression chamber (22) forces continued gas flow into a PCV valve (40). The PCV valve is preferably a two-stage, solenoid-controlled PCV valve. The blow-by gas is then taken in by the intake for recombustion. Hydrocarbons collected by the recovery filter are allowed to flow back into the crankcase. Overall, the ventilation system reduces emissions, increases gas mileage, and increases engine life. |
