Experimental research of intake air filtering fibers in motor vehicle engines

Abstract

Properties of filtering materials used as porous barriers in filter elements of motor vehicle air cleaners have been analyzed. Criteria of fiber and paper selection for the filter elements have been presented. A relation showing the filter life and a coefficient of dust absorption km of filtering materials have been presented. A methodology of research of the fiber filter element characteristics has been developed. Results of investigations of the characteristics of efficiency, filtering accuracy and drag of the filtering fiber operating at different filtering rates have been presented. The coefficients of dust absorption km of the filtering fiber have been determined. Changes in the granulometric properties of dust in the airflow downstream of the filtering fiber and paper have been presented.

Experimental Testing of Filter Materials for Two-Stage Inlet Air Systems of Internal Combustion Engines

“…The established value of flow resistance ∆p w = 5 kPa was achieved by the nonwoven filter media operating under single-stage filtration conditions at a dust absorption rate of k m1 = 700 g/m 2 . This is twice as high as under two-stage filtration conditions, where a value of k m2 = 325 g/m 2 was obtained [51].…”

“…As a result, the filter reaches ∆p fdop much earlier and for a smaller mass of retained dust. Such a phenomenon was observed during experimental [44][45][46][47][48] and numerical [48,49] studies of fibrous materials and during experimental studies of the "cyclone-pleated filter paper" assembly [50][51][52][53].…”

“…The authors of paper [51] carried out experimental studies of a filter cartridge with pleated non-woven fabric with a thickness of g = 2.5 mm operating under single-stage and two-stage filtration conditions, where a multicyclone of through cyclones was used as the first filtration stage. In both cases, polydisperse test dust with grain size d pmax = 80 µm was used.…”