As a classic ‘enabling technology‘, filtration is essential for reliable operation of modern engines in practical applications. Through development of increasingly more efficient and finer filters, MANN+HUMMEL has repeatedly set new standards in this field. A new technological leap is now about to take place that will result in significant performance improvements in service life and filter fineness.

You can experience exactly what this means in practice at our exhibition stand B26 in Hall 13 at the IAA Commercial Vehicles in Hanover.

Technological leap in filtration

Filtration then and now

Higher-performance filters offer direct benefits for vehicle manufacturers and end customers. They do not just separate more particles and offer improved wear protection, but can also store larger quantities of separated particulate matter. This means that the filters have a longer service life, or alternatively offer the same performance in a smaller installation space. This reflects the trend towards lower weight as well as reduced fuel consumption and CO2 emissions.

Filter technology for engine-related applications has developed at a tremendous pace during the last 15 years. As just one example: at the end of the 90s, diesel fuel filters had a separation efficiency of 20 – 40% for particles with a size of 4 micrometres. Over the course of the last decade, MANN+HUMMEL has succeeded in increasing this value to 85% (F-HC) and successively to 95% (F-HE) and 98.7% (F-HE+) with the completely newly developed MULTIGRADE F filter media. Today, we are at 99.7% (F-MB 333) and our product range is used to protect common rail fuel injection systems under all conceivable operating conditions.

A new era in filter technology

We are currently starting a new development cycle based on powerful computer simulation tools. Using the technology of computer tomography familiar from medical applications, we are able today to analyse even the finest fiber structures and to virtually develop a new generation of filter media using innovative calculation programs. For the first time, we can now predict how particle separation will take place in practice – a decisive step for further optimisation of fiber structures.

Without wishing to exaggerate, I am convinced that we can speak of a new era in filter technology. We will significantly increase the dust holding capacity for air, oil, cabin and fuel filters. At the same time, we expect another major step forward in the area of filter fineness. To stay with the example of the diesel fuel filter: thanks to virtual methods, we are now able to further increase the separation efficiency by a factor of 30. From the current best value of 99.7% (F-MB 333) to now 99.99% (F-G 10000). This means that engine developers now have the preconditions at their disposal for reliable execution of the future development stages of common rail technology on the global markets.

High filtration performance

The virtual development of filter media and elements is also a significant factor in enabling a full-scale technological change to synthetic fibers. The current trend is to supplement and replace the cellulose fibers still very dominant in automotive filters by synthetic high-performance fibers. Fibers with a diameter of approximately and less than 1 micrometre are increasingly used for this purpose. Modern air filter media with nano fiber coatings have even finer fibers. These are 500 times finer than a human hair and achieve exceptionally high filtration performance. MANN+HUMMEL nano fiber media of the MICROGRADE A-NF series are also used in the new VarioPleat air filter series for commercial vehicles, for example, in order to offer better protection for turbochargers and air mass flow meters.

The range of filter applications from MANN+HUMMEL extends from diesel fuel filters with three-stage water separation, high-performance oil filters with fully synthetic filter medium and space-saving commercial vehicle air filter systems through to cabin air filters that remove the tiniest respirable fine dust particles. The company has a high level of competence in the development of innovative systems for air and fluid management applications that extend beyond pure filtration. State-of-the-art production technologies and decades of experience ensure reliable operation even in conditions of arctic cold, monsoon rain and tropical heat, in extremely dusty regions as well as with poor-quality fuel.

Are you interested in finding out more? Then visit the number 1 in the filtration field at our exhibition stand in Hanover.