Title:
EXHAUST EMISSION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2022059817
Kind Code:
A
Abstract:
To provide an exhaust emission control device enabling a differential pressure sensor to normally detect differential pressure even in a low-temperature environment.SOLUTION: An exhaust emission control device includes: an exhaust passage 3a in which exhaust gas discharged from an engine 2 flows; a filter 5 disposed in the exhaust passage 3a and collecting particulate matters included in exhaust gas; a differential pressure pipe 6 connected to the exhaust passage 3a on the upstream side and downstream side of the filter 5; a differential pressure sensor 7 connected to the differential pressure pipe 6 and detecting differential pressure between upstream side pressure and downstream side pressure of the filter 5; an ultrasonic wave generating element 8 vibrating the differential pressure pipe 6 by using ultrasonic waves; and an ECU 10 controlling the ultrasonic wave generating element 8 so as to generate ultrasonic waves on the condition that ignition is turned off.SELECTED DRAWING: Figure 1
Inventors:
HAYASHI ATSUSHI
Application Number:
JP2020167649A
Publication Date:
April 14, 2022
Filing Date:
October 02, 2020
Export Citation:
Assignee:
SUZUKI MOTOR CORP
International Classes:
F01N3/023
Attorney, Agent or Firm:
Nissei International Patent Office