Pulse jet air cleaner systems; evacuation valve arrangements; air cleaner components; and, methods

Patent metadata

Field	Value
Publication number	US-9737837-B2
Application number	US-201514940377-A
Country	US
Kind code	B2
Filing date	Nov 13, 2015
Priority date	Jan 22, 2010
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

Assemblies, features, and techniques for pulse jet air cleaner assemblies and their operation are described. Techniques described include methodology and equipment for preferred pulse jet sequencing and operation.

First claim

What is claimed:

1. A method of operating a pulse jet air cleaner assembly for filtering intake air to an internal combustion engine and including a cartridge positioned within a housing thereof; the method including steps of:
(a) directing inlet flow of air to be filtered into a housing of the air cleaner assembly;
(b) filtering the air by passage through the filter cartridge in a filtering flow direction; and,
(c) selectively directing cleaning pulse flow through the filter cartridge in a direction generally opposite the filtering flow direction; the step of directing cleaning pulse flow being in accord with a pulse control logic in which:
(i) when a restriction condition R c reaches a level of at least W, Tier 1 pulsing is conducted for a selected amount A 2 , when next R c drops to Z 2 or less, wherein Z 2 <W;
(ii) when a restriction condition R c of at least W is not reached within a selected time period T, Tier 0 pulsing is conducted for a selected amount A 1 , when next R c drops to Z 1 or less; and;
(iii) if the restriction condition R c reaches a level of at least X, where X>W, without pulsing in accord with Tier 0 and Tier 1, since condition X was reached, Tier 2 pulsing is conducted for an amount A 3 , when next R c drops to Z 3 or less, wherein: Z 3 <X; X>W; and, Z 3 <W; and wherein the pulsing in accord with Tier 2 is different than pulsing in accord with each of Tier 1 and Tier 0.

2. A method according to claim 1 wherein:
(a) the pulsing amounts A 1 , A 2 and A 3 each comprise multiple cleaning pulses.

3. A method according to claim 2 wherein:
(a) A 1 <A 2 .

4. A method according to claim 3 wherein:
(a) A 3 >A 2 .

5. A method according to claim 1 wherein:
(a) Z 1 =Z 2 .

6. A method according to claim 1 wherein:
(a) the selected amount A 1 comprises pulsing for a selected pulse event time period N 1 .

7. A method according to claim 6 wherein:
(a) the selected amount A 2 comprises pulsing for a selected pulse event time period N 2 , wherein N 2 >N 1 .

8. A method according to claim 7 wherein:
(a) the selected amount A 3 comprises pulsing for a selected pulse event time period N 3 , wherein N 1 <N 3 .

9. A method according to claim 1 wherein:
(a) the selected amount A 1 comprises pulsing with a selected time interval M 1 between pulses;
(b) the selected amount A 2 comprises pulsing with a selected time interval M 2 between pulses; and,
(c) the selected amount A 3 comprises pulsing with a selected time interval M 3 between pulses.

10. A method according to claim 9 wherein:
(a) the selected time period M 1 is no greater than 120 sec.

11. A method according to claim 9 wherein:
(a) the selected time period M 1 is at least 15 sec.

12. A method according to claim 1 wherein:
(a) the restriction condition R c is evaluated by monitoring engine RPM.

13. A method according to claim 1 wherein:
(a) the method includes a step of checking an accumulator tank pressure before pulsing; and,
(b) the pulsing is only conducted if the accumulator tank pressure (ATP) is above a selected amount.

14. A method according to claim 1 wherein:
(a) the cleaning pulse flow is conducted in accord with a pulse control logic further wherein:
(i) when the restriction condition reaches a level of at least Y, pulsing is conducted for an amount A 4 , wherein Y>X.

15. A method according to claim 14 wherein:
(a) after pulsing is conducted for an amount A 4 , pulsing is conducted for an amount A 3 , when next drops to Z 3 or less.

Assignees

• Donaldson Co Inc

Inventors

• Wahlquist Fred H
• Olson Thomas
• Deguelle Jason

Classifications

• B01D46/48 Primary

  Removing dust other than cleaning filters {, e.g. by using collecting trays} · CPC title

• F02M35/086

  Dust removal by flushing, blasting, pulsating or aspirating flow, washing or the like; Mechanical dust removal, e.g. by using scrapers · CPC title

• B01D46/0068 Primary

  Operations & Transport · mapped topic

• B01D46/71 Primary

  with pressurised gas, e.g. pulsed air · CPC title

• B01D46/0042

  Use of the inlet flow in order to clean the filter surface · CPC title