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Blowby Heaters

Blowby describes the gas that is generated during compression in a combustion engine or the piston compressor and passes the piston rings from the cylinder into the engine. During the combustion cycle, hot gas that is contaminated with aggressive hazardous substances enters the crank case. This gas is evacuated, de-oiled and then reintroduced for combustion in the induction tract.

Blowby glaciation occurs from temperature differences between the warm blowby gas and the cold intake air. The water contained in the warm blowby gas condenses and freezes the transition point to the cold intake air.

Freezing ice occurs as a result of temperature differences, including the following areas:
  • Entry point of the intake system
  • Pressure control valve and flow control valve
  • Throttles
  • Oil separator
  • Blowby gas conveying lines
DBK’s Blowby heaters are the solution for preventing ice to develop from these circumstances. The Blowby heaters were designed for customer-specific requirements and accommodate the most diverse operating conditions and installation dimensions.

The chemical properties of the blowby gas, which is enriched with fuel residues and have a low ignition point, must be taken into consideration in particular. The heating systems developed by DBK are based of ceramic heating technology and separation of the heating system from the aggressive blowby gas. Another feature of the Blowby heaters is that it can be used to detect leakages (OBD requirement).

Depending on customer requirements, the DBK Blowby heaters can be assembled with or without cables (electric contacts integrated directly on the heater).

The patented DBK pocket solution is implemented and separates the gas reliably from the heating medium. Hazards such as heater malfunctions or short-circuit are therefore eliminated.