Crankcase Ventilation

Crankcase ventilation

Maximum performance and longevity.

Crankcase ventilation is essential to keep engines running cleanly and efficiently. They ensure separation of blow-by gases that are inevitably generated during the compression process of the fuel-oxygen mixture in the engine. This prevents release of unfiltered blow-by gases contaminated with oil mist into the environment. The separated oil is returned to the oil circuit, and the combustion gases return to the intake tract (crankcase ventilation).

In the impactor type oil mist separator, the oil in the blow-by gases is separated through a fleece layer and returned to the crankcase. The filtered gases are then supplied to the intake tract. This reduces the load on engine components such as the intercooler or turbocharger. Other benefits are lower oil consumption and improved combustion.


Generation of blow-by gases

Blow-by gases are generated during the fuel combustion process in combustion engines when gases escape through the piston rings into the crankcase area of the engine. The gases consist of unburned fuel, water, nitrogen oxides and hydrocarbons. They can be caused by insufficient sealing of the piston rings or increased pressure in the cylinders.


Crankcase ventilation – Your customer benefit at a glance:

Crankcase ventilation
  • Compared to other suppliers of crankcase ventilation, we also have the know-how to manufacture crankcase ventilation

  • Patents for the electrically driven disk separator Blue.tron

  • Established brand in the Aftermarket

  • Product range covers a large part of the relevant European car and commercial vehicle models and is constantly being expanded

  • High delivery performance for all products


Further Products

You might also be interested in:
Electrically driven disk separator Blue.tron
Electrically driven disk separator Blue.tron
Passive oil mist separator
Passive oil mist separator

Contact us

Hengst SE
Nienkamp 55-85
48147 Münster
© 2024 Hengst SE

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purifying our planet

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We make the planet a purer place with our products. We also take this journey as cleanly as possible.


We develop the filtration solutions of the future. For our customers and for society.


Our focus is on energy efficiency. This protects the environment and saves costs.