Title:
還元剤供給装置および還元剤供給装置の制御方法
Document Type and Number:
Japanese Patent JP6564393
Kind Code:
B2
Abstract:
A reduction-causing agent supply device includes a tank to store a reduction-causing agent, a pumping unit to pump the reduction-causing agent, a reduction-causing agent supply passage to supply the reduction-causing agent, an injection nozzle to inject the reduction-causing agent into an exhaust pipe, a drawing-back unit to draw the reduction-causing agent toward the tank, and a controller. After stop of an engine, the controller performs: reduction-causing agent drawing-back process of drawing the reduction-causing agent toward the tank and introducing exhaust gas from the injection nozzle into the reduction-causing agent supply passage; and gas discharge process of supplying the reduction-causing agent to compress the exhaust gas inside the reduction-causing agent supply passage, discharging the compressed exhaust gas from the injection nozzle, and closing a valve of the injection nozzle before the reduction-causing agent reaches the injection nozzle.
Inventors:
Hiroshi Kizawa
Application Number:
JP2016563349A
Publication Date:
August 21, 2019
Filing Date:
December 11, 2014
Export Citation:
Assignee:
KOMATSU LTD.
International Classes:
F01N3/08; B01D53/94
Domestic Patent References:
| JP2014218973A | ||||
| JP2009215891A |
Foreign References:
| WO2014061377A1 |
Attorney, Agent or Firm:
Intellectual Property Office