Title:
PM SENSOR
Document Type and Number:
WIPO Patent Application WO/2011/074667
Kind Code:
A1
Abstract:
Provided is a PM sensor which can accurately detect the amount of PM. The PM sensor is provided with a radiator (2) disposed within an atmosphere in which the exhaust from combustion flows, an oscillation circuit (3) which generates a signal by oscillating at the same frequency as the initial natural frequency of the radiator (2), a standing-wave ratio detection circuit (4) for detecting the standing-wave ratio when the signal from the oscillation circuit (3) is fed to the radiator (2), and an estimation circuit (5) for estimating the amount of PM attached to the radiator (2) from said standing-wave ratio.
Inventors:
UCHIYAMA TADASHI (JP)
Application Number:
PCT/JP2010/072767
Publication Date:
June 23, 2011
Filing Date:
December 17, 2010
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
UCHIYAMA TADASHI (JP)
UCHIYAMA TADASHI (JP)
International Classes:
G01N22/00; B01D46/42; F01N3/00; F01N3/02; F02D45/00; G01N27/02
Foreign References:
| JPS6111416A | 1986-01-18 | |||
| JPH0466856A | 1992-03-03 | |||
| JPH0948008A | 1997-02-18 | |||
| JPH0943007A | 1997-02-14 |
Attorney, Agent or Firm:
KINUTANI Nobuo (JP)
Nobuo Kinutani (JP)
Nobuo Kinutani (JP)
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