The new Euro-6 diesel vehicles all require the usage of AdBlue to reduce NOx pollution. AdBlue is an ammonia-based fluid stored in a separate tank in the vehicle that accomplishes Selective Catalytic Reduction (SCR) of nitrous oxides from engine exhaust.
The tricky part of this situation, however, is that the filler neck of this tank is located next to the diesel filler neck. To prevent that AdBlue could enter the diesel tank and cause serious damage to the engine, the AdBlue nozzle must be released by a magnetic system located in the filler neck.
The magnet ring inside the filler neck is prescribed in an ISO standard and has been produced since 2011 by Bakker Magnetics, a developer of magnetic products and assemblies headquartered in Eindhoven, The Netherlands.
Together with a leading German manufacturer of innovative fuel cap technology, Bakker recently developed an innovative magnetic system that switches all available nozzles while using half the height and half the weight of the current magnet, according to Ijsbrand Velzeboer, product manager.
The new hybrid magnet is a combination of NdFeB magnetic material and ferromagnetic material with a magnet grade of N35. It costs 45% less than the previous magnet and weighs about 30% less than it. The weight is 46% less compared to ferrite, says the company. It is available in five sizes, in diameters of 5, 6, 7, 8 and 9 mm. It is designed to optimize the magnetic force by concentrating the magnetic flux at the sides and locations where particularly needed.
For more info, including detailed product design and a video, see www.bakkermagnetics.com