Title:
センサ
Document Type and Number:
Japanese Patent JP6379837
Kind Code:
B2
Abstract:
A sensor that continuously estimates a PM amount in exhaust gas. The sensor includes a filter member 31 including a plurality of cells that trap PM in exhaust gas, electrode members 32, 33 arranged to face each other with the cell interposed therebetween and forming a capacitor, an electric heater 34 that executes, when a predetermined amount of PM has accumulated in the cells, filter regeneration for combusting and removing the PM, a temperature sensor 35 that acquires the temperature of the filter member 31, a storage unit 40 that stores therein a reference temperature, which is the temperature of the filter member 31 in a case where the filter regeneration has been executed in a state in which PM is not flowing into the filter member 31, and estimation units 42, 43, 44 that estimate a PM amount included in the exhaust gas based on an electrostatic capacitance change amount between the electrode members 32, 33 during a regeneration interval period, and estimate the PM amount included in the exhaust gas based on a difference between the temperature acquired by the temperature sensor 35 and the reference temperature during a filter regeneration interval.
Inventors:
Tadashi Uchiyama
Naoto Murasawa
Satoshi Hanawa
Naoto Murasawa
Satoshi Hanawa
Application Number:
JP2014163745A
Publication Date:
August 29, 2018
Filing Date:
August 11, 2014
Export Citation:
Assignee:
Isuzu Motors Limited
International Classes:
F01N3/00; F01N3/023; G01N27/22
Domestic Patent References:
| JP2008190502A | ||||
| JP2012154216A | ||||
| JP5327379B2 |
Foreign References:
| WO2008096853A1 |
Attorney, Agent or Firm:
Nobuo Kinutani