JPH01134715U

JPH01134715U -

Info

Publication number: JPH01134715U
Application number: JP3143288U
Authority: JP
Priority date: 1988-03-09
Filing date: 1988-03-09
Publication date: 1989-09-14

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例としての排ガス後処
理装置の全体構成図、第２図は同上装置の要部を
成す制御系の構成のブロツク図、第３図は第１図
中のフイルタの部分拡大断面図、第４図は同上装
置で用いる流入側圧力と流出側圧力とに応じた再
生ゾーンの算出マツプ、第５図ａ，ｂは同上装置
で用いる排ガス後処理の制御プログラムを示して
いる。１…排気路、４…フイルタ、７…ヒーター、８
…バイパス弁、９…バイパス路、１０…焼却用空
気供給管、１２，１５，２２…駆動回路、１３…
コントローラ、１４…熱交換器、２３，２５…圧
力センサ、２７…差圧算出手段、２８…焼却指令
発生手段。 Fig. 1 is an overall configuration diagram of an exhaust gas after-treatment device as an embodiment of the present invention, Fig. 2 is a block diagram of the configuration of a control system that constitutes the main part of the same device, and Fig. 3 is a diagram of the filter in Fig. 1. Figure 4 shows a calculation map of the regeneration zone according to the inlet side pressure and outlet side pressure used in the same device, and Figures 5 a and b show the control program for exhaust gas after-treatment used in the same device. ing. 1...Exhaust path, 4...Filter, 7...Heater, 8
...Bypass valve, 9...Bypass path, 10...Incineration air supply pipe, 12, 15, 22...Drive circuit, 13...
Controller, 14... Heat exchanger, 23, 25... Pressure sensor, 27... Differential pressure calculation means, 28... Incineration command generation means.

Claims

[Scope of utility model registration request]

a filter that is attached to an exhaust path of an internal combustion engine and captures exhaust particulates; an incineration means that heats the exhaust particulates captured by the filter and supplies air to incinerate and eliminate them from the filter; and an incineration unit upstream of the filter. a bypass path that branches off and extends from the side exhaust path; a differential pressure calculation means that receives pressure information before and after the filter and calculates a difference between the two pressure values; and a difference signal from the differential pressure calculation means. an incineration command generating means that issues an incineration command to the incineration means when the value exceeds a set value; and a bypass that normally closes the bypass path and is switched to guide the exhaust gas to the bypass path instead of the filter in response to the incineration command. An exhaust gas after-treatment device comprising a valve, wherein the incineration air of the incineration means is heated by a heat exchanger using exhaust heat from a bypass passage before being supplied.