Title:
液体の残量検出装置
Document Type and Number:
Japanese Patent JP5900608
Kind Code:
B2
Abstract:
An engine (1) is equipped with a tank (210) that stores urea water, a level sensor (250) that detects the amount of urea water remaining in the tank (210), and a urea injection valve (230) that injects urea water in the tank (210) into an exhaust passage (26). A control device (80) determines whether misdetection is made in the level sensor (250) on the basis of a first urea remaining amount detected by the level sensor (250) immediately after the engine has stopped, and an integrated value for the urea water supply amount, and a second urea remaining amount detected by the level sensor (250) after the supplying of urea water has begun. When the control device (80) determines that misdetection is made in the level sensor (250), the control device sets, as the estimated value for the amount of urea in the tank (210), the value obtained by subtracting the integrated value for the urea water supply amount from the first urea remaining amount.
Inventors:
Hirohiko Ota
Application Number:
JP2014511021A
Publication Date:
April 06, 2016
Filing Date:
April 18, 2012
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F01N3/18; F01N3/00; F01N3/08
Domestic Patent References:
| JP2008082201A | ||||
| JP2010144672A | ||||
| JP2010151094A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda