Development of a Method to Measure Engine Air Cleaner Fractional Efficiency

Jaroszczyk, Tadeusz; Fallon, Stephen L.; Liu, Z. Gerald; Heckel, Scott P.

doi:10.4271/1999-01-0002

Cited by 21 publications

(33 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tests showed that the engine durability depends on the purity of inlet air [ 16 , 17 , 18 ]. The wear of engine components is caused by 1–40-µm dust particles; however, the most damage is done by 5–20-µm particles [ 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Filtration Materials Used in the Car Air Intake

Dziubak

2020

Materials

View full text Add to dashboard Cite

Traditional cellulose filter media used for air filtration in vehicle engines are characterized by 99.9% filtration efficiency and accuracy above 2–5 µm. The highest engine component wear is caused by dust grains above 1 µm. Filter media with nanofiber additions provide greater filtration efficiency of dust grains below 5 µm. Filter material selection for vehicle engine air filter is a problem because their manufacturers mainly provide only the structure parameters: pore size, air permeability, and thickness. There is no information about material filtration properties using polydisperse test dust. The manuscript presents methodology and experimental test results of five samples A, B, C, D and E, filter materials differing in their chemical composition and structure parameters. In the first stage, efficiency characteristics φw, filtration accuracy dzmax and the flow resistance Δpw depending on the dust absorption coefficient km of three filter cartridges of each material, A, B, C, D and E, were determined. Then, from each material characteristics of one piece was selected in order to compare their initial and initial period efficiencies as well as changes in the flow resistance depending on the dust absorption coefficient km. Obtained results showed that the filter materials differ significantly in efficiency and accuracy values in the initial filtration period. Initial period duration is also different, i.e., filtration efficiency increasing time to a certain value, which for materials with a nanofiber layer is much shorter, which minimizes engine component wear. For materials with nanofibers, flow resistance increase intensity is greater, which results from surface filtration. Filtration efficiency of each filter material sample A, B, C, D and E was assessed with the filtration quality coefficient including the efficiency and flow resistance. In the available literature, the problem of increasing filtration efficiency in the initial period is known, but there are no results for specific filter materials. Research shows that filter material characteristics are closely related. Each increase in efficiency and accuracy of intake air filtration reduces engine components wear, but it is related to flow resistance increase in the engine intake system, which reduces its power, and increases need for more frequent filter servicing.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Study of Filtration Materials Used in the Car Air Intake

Dziubak

2020

Materials

View full text Add to dashboard Cite

show abstract

“…The multi-cyclone is characterized by the possibility of separating large masses of dust from the polluted air, without increasing the flow resistance, but with a much lower efficiency (87-95%) and accuracy (d p > 15-35 µm) than those of a paper filter. The remaining insignificant mass of dust is directed to a filter cartridge most frequently made of pleated paper having a low absorption (within the range of 200-250 g/m 2 ), where the dust grains are retained with high accuracy above d p = 2-5 µm [8,[38][39][40]. As a result, air of the required purity is supplied to the engine cylinders and the operation time of the filtration system is extended, and, thus, the service interval is extended, which is limited by the achievement of the specified value of the flow resistance-the permitted resistance ∆p fdop .…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Dust Suction Irregularity from Multi-Cyclone Dust Collector of Two-Stage Air Filter

Dziubak

2021

Energies

View full text Add to dashboard Cite

The necessity of two-stage (multi-cyclone-baffle) inlet air filters used for motor vehicle engines operating under dusty conditions was demonstrated. The advantages of a set of several dozen cyclones (multi-cyclone) used for filtering inlet air in the engines were shown. The problem of dust accumulation separated by the cyclones in the multi-cyclone dust collector and the necessity of its removal on a current basis were analyzed. Methods of removing dust from the dust collector by means of the QS suction flow were described. It was demonstrated that the most rational method of forcing the suction flow is the use of the suction flow released from the engine. The study results are presented in this paper and show that the removal (by suction) of the accumulated dust from the dust collector additionally causes a noticeable increase in cyclone filtration efficiency. It was shown that the effective suction flow must not exceed 10–15% of the outlet flow value from the cyclone. It was evidenced that the suction of dust from the dust collector of the multi-cyclone, whose range covers several dozen cyclones, causes a differentiation in the value of the suction flows from the individual cyclones, which decreases the effect of suction and interferers with the proper operation of the cyclone. The use of a proprietary methodology, an experimental study of the irregularity of the suction from the cyclones of two multi-cyclones differing in construction, was performed. Suction flows from the cyclones, which were located at a significant distance from the main suction duct, showed 50% lower values. Possibilities of reducing the irregularity of the suction flows from the several dozen cyclones forming the multi-cyclone are presented.

show abstract

“…Dust sucked in with the air gets over the piston, which is the reason why the upper part of the cylinder and piston and the upper piston rings wear the most. Abrasive wear of engine components is caused mainly by particles of 1-40 µm, with the most harmful particles in the range of 1-20 µm [3,23,28].…”

Section: Introductionmentioning

confidence: 99%

Problems of selecting filter partition in passenger car engine intake air filters

Dziubak¹,

Bąkała²

2021

Combustion Engines

View full text Add to dashboard Cite

The aim of this study was to verify the criteria for selecting pleated filter partitions used in passenger car engine filters. The paper presents the problem of optimizing pleated air filters in the dir ection of minimizing pressure drop, which is the source of engine energy losses. Two criteria for selection of a paper filter partition for specific operating conditions of the filter and the engine are presented: criterion of permissible separation speed and criterion of permissible pressure drop. The actual filtration area of 44 paper pleated filter elements used in passenger cars and the air stream flowing through the filter were determined, which made it possible to calculate separation speed. In 62% of the analyzed filter inserts, the calculated separation speeds are within the speed range recommended by the constructors, Fmax = 0,06-0,12 m/s. Exceeding permissible separation speed Fmax = 0,12 m/s was found mainly in supercharged engines. Negative effects of engine operation with an air filter with too small separation area are presented, in the form of increased pressure drop and energy loss of the engine as well as shorter car mileage to reach permissible pressure drop.

show abstract

Development of a Method to Measure Engine Air Cleaner Fractional Efficiency

Cited by 21 publications

References 15 publications

Experimental Study of Filtration Materials Used in the Car Air Intake

Experimental Study of Filtration Materials Used in the Car Air Intake

Experimental Studies of Dust Suction Irregularity from Multi-Cyclone Dust Collector of Two-Stage Air Filter

Problems of selecting filter partition in passenger car engine intake air filters

Contact Info

Product

Resources

About