Crankcase valve stops pressure drop damage

摘要

An innovative bypass valve for crankcase ventilation from Mann & Hummel for cars and trucks ensures that the pressure drop in the oil separation system does not lead to undesirable noxious emissions or engine damage. DaimlerChrysler is installing the valve in a petrol engine and Audi in V8 Otto engines. When designing an oil separator design engineers have to pay attention to the pressure drop of the system. To avoid extra pollution such as oil mist or hydrocarbons from the crankcase, legislators demand vacuum pressure for the crankcase in all conditions - from engine idling through to full load.