Keeping things really tight …

Air filters: Innovation makes servicing easier

One of the impressive features of the new radial seal concept for air filter systems from MANN+HUMMEL is the reduced number of individual parts. The MANN-FILTER element can be replaced quickly – the housing is opened and closed by snap-on connectors.

Ludwigsburg, 11th September 2012 – Less is more. The new MANN+HUMMEL air filter concept comprises just three individual parts: a housing, a cover and a MANN-FILTER filter element. This concept means the air filter housing can be easily opened without having to undo any screws. A filter replacement then becomes simpler, quicker and cleaner because the precise fit of the housing shape ensures that the MANN-FILTER air filter element can be easily placed in the correct position. This reduces both servicing time and costs.

What is impressive about the radial seal concept is its ingenuity and simple structure. Four plastic clips join the top and bottom housing parts together. The sealing contour is designed so that the seal is radially compressed and the housing can be fixed without screws.                                             

MANN+HUMMEL, specialists in filtration solutions, supplies a radial sealing system for the 1.2 litre and 1.4 litre TSI engines in the VW Golf and Polo as well as for other vehicles produced using the Volkswagen Group's new Modular Transverse Matrix (MQB) platform. In the customer-specific version, a simple screw connection between the top and bottom housing parts optimises the system's acoustics. The connection acts as a tie anchor to achieve the required stability and reduces air filter vibration (and in turn vibration noise). The air filter element is designed with two recesses for this purpose. These recesses located in the bellows create a tight seal with the screw terminal head. For design reasons, the engineers constructed the filter with the screws entering from below so that they cannot be seen.

MANN+HUMMEL produces the upper and lower parts of the sealing system housing using environmentally-friendly recycled polypropylene in an injection moulding process. The MANN-FILTER air filter is made of cellulose and has a PUR foam seal. At the end of its service life, the filter element can be completely incinerated.

This solution is one of the patent applications which MANN+HUMMEL submits to the German Patents and Trademarks Office (DPMA) every year. The DPMA lists MANN+HUMMEL as one of the most active German patent applicants. In 2011, the filtration specialist filed 111 patents in Germany. Under the MANN-FILTER brand name, customers in the independent aftermarket will benefit from this innovation, which is produced in original equipment quality.

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The MANN+HUMMEL Group is a leading global expert for filtration solutions and development partner and original equipment supplier to the international automotive and mechanical engineering industries. Employing 14,338 people at more than 50 locations worldwide, the company achieved turnover of about 2.5 billion euros in 2011. The group’s product portfolio includes air filter systems, intake manifold systems, liquid filter systems, cabin filters and cylinder head covers made of plastic with many integrated functions for the automotive industry, as well as filter elements for vehicle servicing and repair. For general engineering, process engineering and industrial manufacturing sectors the company’s product range includes industrial filters, a series of products to reduce carbon emission levels in diesel engines, membrane filters for water filtration and filter systems.