SCR Technology

In the future SCR technology will require that drivers stop off at the service station not only for a diesel fill-up but also to fill a separate tank with a norm-defined carbamide.

This special carbamide solution is fed into the exhaust branch via a hose line. The ammonia (NH3) in the solution reacts with the nitrogen oxide in the exhaust-system branch and converts it into nitrogen (N2) and water vapor (H2O).

Although SCR technology promises a host of advantages, there has been one decisive drawback so far: Carbamide freezes already at a temperature of about –11°C. This means that in the cold months of the year, the system would freeze up when the vehicle is parked for any amount of time. ContiTech has thus developed a hose line module in which several chargeable heating wires are embedded into the elastomer hose jacket.

The reducing-agent hose line can be used as a supply and return flow hose as well as an intake and pressure equalization hose.

The Advantages of the ContiTech SCR Technology Hose Line Module in a Nutshell:

• The hose and the medium are prevented from freezing in every phase of operation, thus guaranteeing the full functioning of the system.
• Suitable insulation and sheathing of the electric contacts ensures that the safety of the system complies with the IP 60 K degree of protection and is urea-resistant up to a temperature of 80°C.
• The hose line system can be used within a temperature range of –40°C to +100°C.
• ContiTech uses extra-long hose lines so that tanks in extremely awkward positions can also be integrated into the system.

Technical Data – Commercial Vehicles