Air filter system for a utility vehicle

Patent metadata

Field	Value
Publication number	US-11434854-B2
Application number	US-202117141932-A
Country	US
Kind code	B2
Filing date	Jan 5, 2021
Priority date	Jan 27, 2020
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

An air filter system for a utility vehicle includes a filter housing, a coarse filter located on an inlet side and accommodated in the filter housing, a fine filter arranged downstream in a filter operating direction of an airflow to be cleaned, and a cleaning arrangement accommodated in the filter housing for purging dirt particles separated at least in the fine filter counter to the filter operating direction.

First claim

The invention claimed is:

1. An air filter system for a utility vehicle, comprising:
a filter housing;
a coarse filter on an inlet side and accommodated in the filter housing;
a fine filter arranged downstream in a filter operating direction of an airflow to be cleaned;
a cleaning arrangement accommodated in the filter housing for purging dirt particles separated at least in the fine filter counter to the filter operating direction;
a safety filter redundantly arranged downstream of the fine filter inside the filter housing in the filter operating direction; and
an air outlet nozzle oriented in a direction of a filter surface of the fine filter, wherein the air outlet nozzle feeds into a housing chamber region located between the fine filter and the safety filter in the direction of the filter surface, and wherein the air outlet nozzle extends through the safety filter into the housing chamber region.

2. The air filter system of claim 1 , further comprising a pressurized air source for supplying pressurized air to the air outlet nozzle.

3. The air filter system of claim 1 , wherein the cleaning arrangement comprises a plurality of air outlet nozzles arranged so as to be distributed over the filter surface.

4. The air filter system of claim 1 , wherein the coarse filter comprises a centrifugal air filter for pre-cleaning air suctioned from its surroundings.

5. The air filter system of claim 1 , wherein the fine filter comprises a folded filter fabric accommodated in a cartridge insert for increasing an effective filter surface.

6. The air filter system of claim 1 , wherein the pressurized air source is automatically actuated by a monitoring unit based on a timing control.

7. The air filter system of claim 1 , wherein the pressurized air source is automatically actuated by a monitoring unit based on a filter state detection.

8. The air filter system of claim 1 , wherein the pressurized air source is actuated after starting up the utility vehicle and before a driving operation.

9. A utility vehicle, comprising:
an engine compartment; and
air filter system disposed within the engine compartment, the air filter system comprising:
a filter housing;
a coarse filter on an inlet side and accommodated in the filter housing;
a fine filter arranged downstream in a filter operating direction of an airflow to be cleaned;
a cleaning arrangement accommodated in the filter housing for purging dirt particles separated at least in the fine filter counter to the filter operating direction;
a safety filter redundantly arranged downstream of the fine filter inside the filter housing in the filter operating direction; and
an air outlet nozzle oriented in a direction of a filter surface of the fine filter, wherein the air outlet nozzle feeds into a housing chamber region located between the fine filter and the safety filter in the direction of the filter surface, and wherein the air outlet nozzle extends through the safety filter into the housing chamber region.

10. The utility vehicle of claim 9 , further comprising a pressurized air source for supplying pressurized air to the air outlet nozzle.

11. The utility vehicle of claim 9 , wherein the cleaning arrangement comprises a plurality of air outlet nozzles arranged so as to be distributed over the filter surface.

12. The utility vehicle of claim 9 , wherein the coarse filter comprises a centrifugal air filter for pre-cleaning air suctioned from its surroundings.

13. The utility vehicle of claim 9 , wherein the fine filter comprises a folded filter fabric accommodated in a cartridge insert for increasing an effective filter surface.

14. The utility vehicle of claim 9 , wherein the pressurized air source is automatically actuated by a monitoring unit based on a timing control.

15. The utility vehicle of claim 9 , wherein the pressurized air source is automatically actuated by a monitoring unit based on a filter state detection.

16. The utility vehicle of claim 9 , wherein the pressurized air source is actuated after starting up the utility vehicle and before a driving operation.

17. A filter system for a utility vehicle, comprising:
a filter housing;
a coarse filter located on an inlet side and accommodated in the filter housing, the coarse filter comprises a centrifugal air filter for pre-cleaning air suctioned from its surroundings;
a fine filter comprising a filter surface, the fine filter being arranged downstream in a filter operating direction of an airflow to be cleaned;
a cleaning arrangement accommodated in the filter housing for purging dirt particles separated at least in the fine filter counter to the filter operating direction, the cleaning arrangement comprising an air outlet nozzle oriented in a direction of the filter surface;
a pressurized air source for supplying pressurized air to the air outlet nozzle; and
a safety filter arranged downstream of the fine filter and located inside the filter housing in the filter operating direction;
wherein the air outlet nozzle feeds into a housing chamber region located between the fine filter and the safety filter in the direction of the filter surface;
wherein the air outlet nozzle extends through the safety filter into the housing chamber region.

18. The filter system of claim 17 , wherein the pressurized air source is automatically actuated by a monitoring unit based on a timing control.

19. The filter system of claim 17 , wherein the pressurized air source is automatically actuated by a monitoring unit based on a filter state detection.

20. The filter system of claim 17 , wherein the pressurized air source is actuated after starting up the utility vehicle and before a driving operation.

Assignees

• Deere & Co

Inventors

• Yuen Ming Parker
• Sananikone Phouphadeth
• Förster Axel
• Berg Alexander

Classifications

• F02M35/0216

  arranged in series, e.g. pre- and main filter in series · CPC title

• B01D50/20

  Combinations of devices covered by groups B01D45/00 and B01D46/00 · CPC title

• F02M35/02458 Primary

  consisting of multiple layers, e.g. coarse and fine filters; Coatings; Impregnations; Wet or moistened filter elements · CPC title

• F02M35/086 Primary

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

• B01D46/71

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