Dirty/Clean Air Ducting Systems

Dirty/Clean Air Ducting Systems

Continental air ducts are used for both the dirty air side (in front of the air filter) and the clean air side (behind the air filter). Depending on the filter system used, the clean air duct must be able to withstand vacuum pressure of up to -180 mbar (i.e. 820 mbar absolute) without collapsing.

If the air duct leads directly from the air filter to the turbocharger, high temperature resistance is required for the connection to the turbocharger. Due to the high air flow rate, a smooth and streamlined inner hose design is required in order to minimize pressure loss. This also has a positive effect on the acoustic behavior of the hose.

Continental has developed a bellows design that not only lends the hose excellent flexibility, but also meets the requirements for vacuum resistance in service. The aim of this development was to achieve optimal balance between the weight of the hose on the one hand and compliance with the requirements on the other hand.

Technical Specifications

Operating temperatures:

• For CR: -40°C to +100°C (max. +120°C)
• For EPDM: -40°C to +110°C (max. +130°C)
• For ECO (unleaded): -40°C to +120°C (max. +140°C)*
• For EPDM (peroxide): -40°C to +150°C (max. +170°C)
• For AEM: -35°C to +160°C (max. +180°C)

*as per ELV 2000/53/EC

Permissible vacuum load:
Up to -180 mbar (i.e. 820 mbar absolute) at operating temperature for the simple injection molded part without reinforcement. The vacuum/overpressure resistance can be increased through the addition of strengthening features.

Media Resistance:
The resistance to UV light, ozone and/or chemical agents corresponds to the properties of the individual elastomers.

Benefits of Intake Manifolds and Air Ducts

• Air intake hoses for diesel and petrol engines with additional outflows
• Socket for temperature/pressure sensors
• Noise damping measures using steel rings
• Flexibility and vacuum stability provided by folds and ribs
• Material suitable for use in every temperature range