Innovations in industrial air filtration---Automotive filtration
Innovations in industrial air filtration---Automotive filtration
As a result of the drivers identified above, Hollingsworth & Vose Company, a filter media developer and manufacturer, has introduced two new families of automotive air induction products, Capaceon™ media and NANOWEB® media, which specifically address the growing need for higher unit filtration capacity and higher efficiency at a lower media delta pressure.
The common mobile engine air intake filter has changed in recent years from a flat circular array of pleated filter medium to the ‘flat' panel automotive filter and the tall radial commercial vehicle filter. New requirements often mean ‘common' is no longer enough.
Andrew Shepard, Director of Global Market Management at Hollingsworth & Vose, told us that new powertrain technologies, more efficient and lower aerodynamic lines at the front of vehicles, and bigger cooling packages implemented to meet higher fuel economy standards, have resulted in automotive manufacturers leaving less and less room in the engine compartment for air filters.
Shepard said: “Our new filter media can help manufacturers design filtration systems in a variety of shapes and sizes to fit today's engine compartments or new positions outside normal locations.”
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Capaceon is a new category of high-performance automotive air filter media that maintains current media cost of ownership but breaks the traditional link between basis weight and media performance. Hollingsworth & Vose claims that both the water-based and solvent-based versions of Capaceon media offer 20-50% higher dust-holding capacity and improved initial efficiency at equal basis weights compared to current media used in the market. This creates more value for customers by offering a higher level of engine protection and a longer service interval. Combined with extra water resistance, the media enables higher performance in smaller, more flexible packages. Also, smaller air induction systems, which can be placed in less-desirable vehicle locations, help designers reduce vehicle weight through more efficient design and improved vehicle aerodynamics.
To meet the GHG reduction requirements already identified, new vehicles will effectively need to clean the environment, actually emitting lower particulate concentrations in exhaust gases than were present in the air intake. Soot particles, typically in the 60 nm to 100 nm range, in the air intake shorten the life of most filters. Major medium and heavy-duty truck filter manufacturers have chosen Hollingsworth & Vose NANOWEB media in their filters because real-world tests have demonstrated the technology improves equipment protection, extends filter service intervals and has a lower filter delta pressure than other standard media. NANOWEB media provides both a lower initial pressure drop and higher fractional efficiency. NANOWEB media's durable 0.3-0.5 μm fibres filter out ultrafine particles, like soot, while being remarkably resistant to clogging, which significantly improves service life. The total cost of ownership can be reduced whilst directly contributing to achieving the new environmental regulations.
Most vehicles use Mass Air Flow (MAF) sensor outputs to optimise engine combustion and meet fuel economy and emissions regulations. Solvent-based NANOWEB media for automotive air applications was specifically designed for large engine displacement, light-duty applications where oil has been traditionally added to the filter media to meet high capacity requirements. Designing NANOWEB media into these filter applications removes the need for oil by directly increasing element service intervals. This minimises fouling of the sensitive MAF sensors and other electronics which in turn helps engines maintain optimised fuel economy and emissions performance. Hollingsworth & Vose also offers NANOWEB media for on-road and off-road heavy duty air filter applications as well as for larger scale gas turbine and dust collection systems.
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