问：PCV阀

流入进气口的空气过多会导致发动机倾斜，这是由于与燃料和失火相关的空气过多。在闲置时，PCV阀限制了气流，以减少此问题。在高歧管真空（闲置）下，绘制了一个弹簧加载阀，并部分限制流向曲轴箱的流动。PCV系统相对简单。入口软管连接到过滤的空气源。这用于提供通过发动机抽取的清洁空气。大多数时候，此空气是通过发动机空气过滤器提供的。在一些设计上，有一个单独的入口过滤器，仅清洁PCV系统的传入空气。该过滤的空气流过发动机，捡起烟雾和蒸气。空气通过另一个软管退出，连接到歧管真空。 The flow of air draws fumes from the crankcase and burns them harmlessly in the engine. This also creates a slight vacuum, relieving any pressure that may build. Negative pressure helps to prevent oil leaks and oil consumption by the engine. The PCV valve also helps regulate the amount of air flow, which helps prevent oil being drawn out of the engine. When the PCV valve is not working correctly, this will cause an imbalance in air flow and vacuum causing the check engine light to come on. You may also notice a bit of a whistling sound when the valve is not working properly. I would recommend having an expert from YourMechanic come to your location to diagnose and replace yourPCV阀。