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Required Filtration Efficiency

Filter specifications: comparison of requirements for filter efficiency. 100. 80. 60. 40. "Normal" conditions. "Severe" conditions. 20. ISO/TR 13353:1994. 0. Time-Controlled HP Injection. Systems. Required Filtration Efficiency. Filtration Efficiency 3-5 µm, %.

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Required Filtration Efficiency

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  1. Filter specifications: comparison of requirements for filter efficiency 100 80 60 40 "Normal" conditions "Severe" conditions 20 ISO/TR 13353:1994 0 Time-Controlled HP Injection Systems Required Filtration Efficiency Filtration Efficiency 3-5 µm, % Improvement required depends on application, fuel contamination and life time In-line Pump Distributor Pump RBCP/SNS-Va

  2. Definition of Filtration Efficiency Filter specs: definition • For BOSCH FIE filtration efficiency is defined according to the pre-standard ISO/TR 13353:1994. Required filtration efficiency depends on application, expected fuel contamination and required life time (see following slides). For specific values see corresponding TCI • In the meantime the standard ISO/TS 13353:2002 has become valid. Main difference to the pre-standard is the calibration procedure • (ISO 11 171 instead ISO 4402). This requires an adaptation of the present values. The correlation is presently under preparation. • The International Standard Organization is working on a new multi-pass method (ISO/DIS 19438) which should substitute ISO/TS 13353 in a few years RBCP/SNS-Va

  3. Definition of Filtration Efficiency Filtration efficiency 100 95 90 85 80 75 Test Method : ISO/TR 13353, Edition 1994-10-01 125 l/h 70 Flow Rate : 65 Test Dust : ISO Fine Test Dust 60 0 5 10 15 20 25 30 15 - 20 µm 20 - 30 µm > 30 µm 10 - 15 µm Filtration efficiency has to be improved under consideration of application, fuel contamination and life time 5 - 10 µm Average Initial Efficiency, % 3 - 5 µm Particle Size, µm RBCP/SNS-Va

  4. Filter specification issue • TCD’s KM 45 110 004_en KM 45 110 005 and KM 45 110 007 describe Bosch requirements for fuel filter, water trap and allowed fuels for CR systems (CRS) • Bosch offers Fuel filters for PC/LD-applications which fulfill DS-requirements for filtration in both normal and severe conditions • Customers should be advised to use only the fuel filter with right specifications acc. to DS-requirements • Protection of the injection system only possible by means of a suitable filter system RBCP/SNS-Va

  5. Filter specifications normal conditions RBCP/SNS-Va

  6. Filter specifications severe conditions RBCP/SNS-Va

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