Title:
EXHAUST EMISSION CONTROL SYSTEM AND VEHICLE
Document Type and Number:
Japanese Patent JP2021046814
Kind Code:
A
Abstract:
To highly accurately estimate whether a reductant freezes inside a supply pipe.SOLUTION: An exhaust emission control system S for cleaning an exhaust gas flowing through an exhaust passage 20 with urea water includes: a tank 42 for storing urea water; an injection part 41 for injecting urea water into the exhaust passage 20; a pump 44 for delivering urea water toward the injection part 41 from the tank 42; a supply pipe 43 which connects the pump 44 to the injection part 41 and through which urea water flows; and a freezing estimation unit (control unit 100) for estimating whether urea water freezes inside the supply pipe 43 on the basis of peripheral temperature of the supply pipe 43, temperature of the pump 44 and a delivery amount of urea water by the pump 44.SELECTED DRAWING: Figure 1
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Inventors:
YAMAGUCHI KAZUMI
Application Number:
JP2019169262A
Publication Date:
March 25, 2021
Filing Date:
September 18, 2019
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F01N3/08; B01D53/94; F01N3/18; F01N11/00
Attorney, Agent or Firm:
Izumidori
Hisato Kuroiwa
Hisashine Kyonori
Kensuke Terakawa
Hisato Kuroiwa
Hisashine Kyonori
Kensuke Terakawa