Title:
DOSING SYSTEM HAVING RECIRCULATION HEATING AND VACUUM DRAINING
Document Type and Number:
WIPO Patent Application WO/2012/012506
Kind Code:
A3
Abstract:
A reductant dosing system (10) is disclosed. The reductant dosing system may have a supply (16) of reductant, a reductant nozzle (20), and a pump (18) with an inlet (28) and an outlet (30). The reductant dosing system may also have a first passage (32) connecting the supply with the inlet of the pump, and a first control valve (40) disposed in the first passage. The reductant dosing system may further have a second passage (34) connecting the outlet of the pump with the reductant nozzle, and a second control valve (42) disposed in the second passage. The reductant dosing system may additionally have a third passage (48) connecting the second control valve to the first passage at a location downstream of the first control valve, and a fourth passage (50) connecting the second control valve with the supply.
Inventors:
ISADA RAYMOND UPANO (US)
LI YONGXIANG (US)
LI YONGXIANG (US)
Application Number:
PCT/US2011/044642
Publication Date:
April 05, 2012
Filing Date:
July 20, 2011
Export Citation:
Assignee:
CATERPILLAR INC (US)
ISADA RAYMOND UPANO (US)
LI YONGXIANG (US)
ISADA RAYMOND UPANO (US)
LI YONGXIANG (US)
International Classes:
F01N3/10; B01D53/94; F01N3/20; F01N3/28
Foreign References:
| US20100122521A1 | 2010-05-20 | |||
| US20060277899A1 | 2006-12-14 | |||
| US20050069476A1 | 2005-03-31 | |||
| US20100064670A1 | 2010-03-18 |
Attorney, Agent or Firm:
STANKIEWICZ, John, W. et al. (Peoria, IL, US)
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