JPS61135250U

JPS61135250U -

Info

Publication number: JPS61135250U
Application number: JP1769485U
Authority: JP
Priority date: 1985-02-13
Filing date: 1985-02-13
Publication date: 1986-08-23
Also published as: JPH0348527Y2

Description

[Brief explanation of the drawing]

第１図は本考案を示す構成図、第２図は電極部
の構造を前面より見て示す図、第３図は上面図、
第４図は本考案のセンサの原理的構成図、第５図
は電極部へのパテイキユレートの堆積状態を説明
する模式図、第６図は第５図の等価回路図、第７
図はインピーダンスと付着率との模式的関係線図
、第８図は電極へのパテイキユレート付着率δと
トラツプ材へのパテイキユレート付着率δ′との
模式的関係線図、第９図は本考案のセンサを有し
たパテイキユレートの捕集及び焼却システムを備
えたデイーゼル機関の全体図、第１０図は第９図
のトラツプ材の部分の全面図、第１１図は第９図
の制御回路のブロツク図、第１２図は第９図の制
御回路のソフトウエア構成を示すフローチヤート
図、第１３図は排気温とパテイキユレートのイン
ピーダンスを水蒸気濃度をパテイキユレートにと
つて示すグラフ、第１４図は補正係数を示す図表
である。１０，１２……電極、１４……電極部、１６…
…交流電源、１８……インピーダンス測定手段、
３６……フイルタ、８０……排気温センサ、８２
……スロツトルセンサ。 Fig. 1 is a configuration diagram showing the present invention, Fig. 2 is a diagram showing the structure of the electrode section viewed from the front, Fig. 3 is a top view,
Fig. 4 is a basic configuration diagram of the sensor of the present invention, Fig. 5 is a schematic diagram illustrating the deposition state of particulate on the electrode part, Fig. 6 is an equivalent circuit diagram of Fig. 5, and Fig. 7
The figure is a schematic relationship diagram between impedance and adhesion rate, Figure 8 is a schematic relationship diagram between particulate attachment rate δ to the electrode and particulate rate attachment rate δ' to the trap material, and Figure 9 is a diagram showing the relationship between the particulate rate adhesion rate δ to the electrode and the particulate rate adhesion rate δ' to the trap material. An overall view of a diesel engine equipped with a particulate collection and incineration system equipped with a sensor, FIG. 10 is a full view of the trap material portion of FIG. 9, and FIG. 11 is a block diagram of the control circuit of FIG. 9. Fig. 12 is a flowchart showing the software configuration of the control circuit in Fig. 9, Fig. 13 is a graph showing the exhaust temperature and impedance of the particulate by taking water vapor concentration into the particulate, and Fig. 14 is a chart showing the correction coefficient. It is. 10, 12... electrode, 14... electrode part, 16...
...AC power source, 18...impedance measuring means,
36...Filter, 80...Exhaust temperature sensor, 82
...Throttle sensor.

Claims

[Scope of utility model registration request]

a pair of electrodes located at intervals in the exhaust gas flow; a constant voltage AC power source connected to the electrodes;
An impedance measuring means for detecting impedance between electrodes, an exhaust temperature sensor for detecting the temperature of exhaust gas, a water vapor detecting means for detecting the amount of water vapor in the exhaust gas, and a correction coefficient based on the exhaust gas temperature and the amount of water vapor. A sensor for detecting the amount of particulate deposits in exhaust gas, comprising: means for determining the impedance, and means for determining whether or not regeneration of the particulate filter is necessary by multiplying the impedance by a correction coefficient.