Invention Grant
- Patent Title: Particulate matter detection device
- Patent Title (中): 颗粒物检测装置
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Application No.: US13057174Application Date: 2010-01-08
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Publication No.: US08736284B2Publication Date: 2014-05-27
- Inventor: Keiichiro Aoki
- Applicant: Keiichiro Aoki
- Applicant Address: JP Toyota-shi
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/JP2010/050158 WO 20100108
- International Announcement: WO2011/083581 WO 20110714
- Main IPC: G01R27/26
- IPC: G01R27/26

Abstract:
A particulate matter detection device that detects the diameter and the amount of particulates in exhaust gas while reducing detection error caused by deterioration such as the deterioration of electrodes is provided. In the particulate matter detection device, which measures particulates in a gaseous body, AC voltages having different frequencies are applied to a pair of electrodes disposed apart from each other. The resulting impedances to the different frequencies are detected. A resistance component and/or a capacitance component of the impedances to the different frequencies are calculated. The average diameter and/or the number of particulates in the gaseous body are estimated in accordance with changes in the resistance component and/or the capacitance component.
Public/Granted literature
- US20110285410A1 PARTICULATE MATTER DETECTION DEVICE Public/Granted day:2011-11-24
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