JPH023012U

JPH023012U -

Info

Publication number: JPH023012U
Application number: JP8055888U
Authority: JP
Priority date: 1988-06-20
Filing date: 1988-06-20
Publication date: 1990-01-10

Description

[Brief explanation of drawings]

第１図は本考案実施例の概略図、第２―Ａ図は
絞り弁手段を開にした状態を示す概念図、第２―
Ｂ図は絞り弁手段を閉にした状態を示す概念図、
第３図はパテイキユレートトラツプの前後圧とフ
イルタへのパテイキユレート堆積量との関係図で
ある。１…排ガス通路、２…パテイキユレートトラツ
プ、２ａ…フイルタ、３…電気ヒータ（燃焼手段
）、４…制御手段、５…第１の圧力センサ、６…
第２の圧力センサ、７ａ…エアタンク、７ｂ…エ
アシリンダ、７ｃ…伸縮アーム、８…絞り弁手段
、８ａ…透孔、８ｂ…下端部、８ｅ…弁収納部、
４１，４１，５１，６１…信号。 Fig. 1 is a schematic diagram of an embodiment of the present invention, Fig. 2-A is a conceptual diagram showing a state in which the throttle valve means is open, and Fig. 2-
Figure B is a conceptual diagram showing a state in which the throttle valve means is closed;
FIG. 3 is a diagram showing the relationship between the front and back pressure of the particulate trap and the amount of particulate deposited on the filter. DESCRIPTION OF SYMBOLS 1... Exhaust gas passage, 2... Particulate trap, 2a... Filter, 3... Electric heater (combustion means), 4... Control means, 5... First pressure sensor, 6...
Second pressure sensor, 7a... Air tank, 7b... Air cylinder, 7c... Telescopic arm, 8... Throttle valve means, 8a... Through hole, 8b... Lower end, 8e... Valve storage part,
41, 41, 51, 61...signal.

Claims

[Scope of utility model registration request]

First and second pressure sensors are installed on the upstream and downstream sides of a particulate trap that is disposed in an exhaust gas passage of an internal combustion engine and includes a particulate combustion means, respectively, and further downstream of the second pressure sensor. A throttle valve means and a throttle valve drive means for inserting and removing the throttle valve means into and from the exhaust gas passage are disposed in the side exhaust gas passage, and the throttle valve drive means is further actuated during a predetermined operating state of the internal combustion engine. inserting the throttle valve means into the exhaust gas passage, detecting the exhaust gas flow rate from the pressure value detected by the second pressure sensor, and detecting the detected exhaust gas flow rate and the pressures detected by the first and second pressure sensors. An exhaust gas after-treatment device characterized in that a control means for operating the combustion means according to the difference is provided.