What is the primary function of the crankcase ventilation system?

The primary function of the crankcase ventilation system is to manage gases escaping from the combustion chamber. During the combustion process, a small amount of combustion gases can leak past the piston rings and enter the crankcase. This mixture of gases, often referred to as blow-by, can include harmful substances that may affect engine performance and longevity.

The crankcase ventilation system works to recirculate these gases back into the intake manifold, where they can be re-burned during combustion, thereby reducing emissions and maintaining engine efficiency. In addition, properly managing these gases helps to prevent excessive pressure build-up in the crankcase, which can lead to oil leaks and other engine-related issues.

By effectively channeling these gases, the crankcase ventilation system plays a crucial role in maintaining an optimal internal environment for the engine, supporting its performance and durability over time.