1. Presentation to O&H Panel December 3, 2001 David M Stehouwer
M11 EGR Filter Analysis
Presentation to
O&H Panel
December 3, 2001
David M Stehouwer

2. M-11 EGR Test Status Proposed Limits CWL 20 mg
TWL 175 mg (no ring gap correlation)
OFDP hrs
ASR 8.0
BWL, IAS: Report Value

3. Evaluation of Beaded Filters
Concern over number and spacing of pleats
Questionable used filters returned to FG
Statistical sampling (36) of 550 filter batch returned to FG
Perform flow vs. restriction
Examine extremes for pleat count and spacing
Perform dust capacity testing on extremes
Refer to O&H Panel

4. Flow vs. Restriction for Reference Filters
Analysis of 34 filters reference filters

5. Flow vs. Restriction for Reference Filters
Showing M11 EGR Filter Plugging Limit

6. M11 EGR 2 Reference Filter Pleat Count
Analysis of 34 filters reference filters

7. M11 EGR 2 Filter Efficiency
Pleat spacing does not effect filter efficiency

8. M11 EGR 2 Filter Dust Capacity
Dust capacity is reasonably consistent and unaffected by spacing

9. M11 EGR 2 Filter Dust Capacity
Showing maximum deposit from Matrix

10. Analysis of Test Filters by Fleetguard

11. Observations from Filter Analysis
Pleat count is from 55 to 61 with a target of 55 min.
Filter efficiency is very consistent and not affected by pleat spacing
Filter dust capacity is reasonably consistent
One outlier appears not related to spacing
Bunched pleats do remove slightly less material, but...
Bunched pleats can remove a lot of deposit with less variation than expected

12. Improvement in Consistency
Comparison of 1st 14 matrix runs using unbeaded filters with lab result on beaded filters. Mean +/- 1 sd.
Matrix Data
Unbeaded
Lab Data
Beaded