automotive design 25
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Fig. 2. To reduce noise and pollutant emissions, engine manufacturer Deutz is now offering a modular system for its compact engines – the DVERT, ie Deutz Variable Emission Reduction Technology.
Photo: ContiTech/Deutz.
can be heated and the solution is prevented from freezing.
The heatable reducing agent hose, which can be used as suction and return hose as well as pressure compensation hose, is equipped with an EPDM-based inner lining.
Heating conductors
The electric heating conductors – positioned on a polyester mesh functioning as pressure carrier – encircle the hose, the cover of which is likewise made of EPDM. A low-permeation inner lining ensures that no carbamide can escape from the system. The built-in heating filaments even have the effect of improving the hose’s mechanical properties.
One of the major challenges posed and overcome was that of securing the hose’s electric contacts against dust, dampness and extreme temperatures. Here, with the right insulation and sheathing, ContiTech was able to provide for safety, which is so very important for mobile non-road machinery in particular.
The system complies with the IP 69 K protection standard and is carbamide resistant up to a media temperature of 85°C. It can be used within an ambient temperature range of -40°C to 130°C, thereby ensuring that the system functions properly even at low temperatures.
This is absolutely essential for an optimum engine setting in terms of exhaust emissions. In the event of a catalyst failure, the system’s exhaust gas values would otherwise be even worse than the values with fuel- optimised engine settings.
更自信的设计源自 BISCO® 硅胶
PORON® 聚氨酯
能量管理
更多信息请访问：
www.rogerscorp.com
➠ Circle 25 or ✔ at
www.engineerlive.com/ape
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