Buehler Motor is developing a highly integrated motor for DINOX SCR System from Inergy Automotive Systems.
Nuremberg, 11th February 2010 - As a development partner of its customers, Buehler with its custom-fit DC motors and gear motors, is making the reduction of harmful emission possible, even in the most challenging environments. A good example is the development of a highly integrated pump drive for the SCR system DINOX from Inergy Automotive Systems. INERGY is leading global Tier One supplier of complete plastic Fuel Systems, innovating onboard energy and fluid storage technologies to automotive manufacturer.
The regulations under Euro 6 which mandate further drastic reductions in nitric oxides emissions in Diesel motors cannot be fulfilled with engine-only solutions. Under Euro 4, 250 milligram per kilometer were still allowed; now, under Euro 5, this has been reduced to 180 milligram. With the next mandate, Euro 6, only 80 milligram will be tolerated starting in 2014.
SCR, selective catalytic reduction, is an effective solution to the problem. Nitric oxide is split into the harmless components nitrogen and water, when a targeted urea solution is added. An exact dose of this solution is injected behind the particle filter, right in front of the SCR catalyst into the emission stream.
Liquid supply is designed so that it does not have to be re-filled until the next maintenance is due. This means that for the end user the system is totally maintenance-free. With its sophisticated design the INERGY solution is using space that until now was not efficiently utilized in an optimal way, and thus uses the existing loading space only to a small extent.
For the individual components, e.g. the pump motor, this means maximum output in minimum space must be achieved. Buehler’s engineers solved this problem with a brushless design, featuring segmented stators. The segmented stators allow the system contain more copper and therefore increase energy density.
A further challenge was protecting the motor from the special liquid surrounding it. In close cooperation with INERGY’s development team, Buehler’s engineers were able to overcome this problem by using an optimized material mix. In-house extensive test labs and a sample shop is a further advantage of the Buehler team, which helped having the specified design ready to go into production within a very tight timeline.
"It is exceptionally reassuring to have a development partner like Buehler Motor on your side. Buehler not only understands our requirements right from the start, but also is reliable, as well as flexible, in finding solutions to all the questions that arise during the design process". This from Jean-François Bérard, INERGY's Vice-President, Research & Development/Corporate Strategy.
Buehler’s engineers are especially proud to be able to meet the tight cost budget. They feel their special strength is not only to enthusiastically find innovative solutions to complex tasks, but to do this with a constant focus towards the magic triangle of technical genius, practicality, and cost-efficiency.
“This order is a further milestone in our consistent efforts to bring innovative solutions for innovative applications in the automotive field. Buehler is offering another contribution towards a cleaner environment, and was able to convince the technological leader in this area of Buehler’s superior performance,“ per Rudolf Kaiser, Corporate Director Sales Automotive, Buehler Motor.
Currently the final tests and adjustments are underway and start of production is planned for 2011. The first vehicles, among them Audi and General Motor models, will perform below the stringent regulations that go into effect in 2014, as early as 2011.
www.inergyautomotive.com