JPS6247747U

JPS6247747U -

Info

Publication number: JPS6247747U
Application number: JP13975785U
Authority: JP
Priority date: 1985-09-12
Filing date: 1985-09-12
Publication date: 1987-03-24

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の構成を明示するための全体
構成図である。第２図はこの考案の第１実施例の
機械的構成を示す概略図、第３図は第２図中のコ
ントロールユニツト内で行なわれる動作を説明す
る流れ図、第４図は過給圧の一定値制御のために
吸気の逃しを必要とされる領域Ａと、パーテイキ
ユレートの燃焼のために空気導入が必要とされる
領域Ｂとを重ねて示す特性図、第５図はアクセル
ペダルを踏み込んで加速を行つた場合につきこの
実施例の作用を説明する過給圧と排気中の酸素濃
度との特性図である。第６図はこの考案の第２実
施例の機械的構成を示す概略図、第７図は第６図
中のコントロールユニツト内で行なわれる動作を
示す流れ図、第８図は吸気逃し量特性図である。
第９図は従来例の排気浄化装置の概略図、第１０
図は同じく過給圧制御手段の概略図である。１……排気通路、２……触媒担持フイルタ、３
……断熱材、１２……吸気通路、１５……ターボ
チヤージヤ、１６……排気タービン、１７……吸
気コンプレツサ、２０……吸気逃し通路、２１…
…弁手段、２２……過給圧制御手段、２３……運
転状態検出手段、２５……圧力センサ、２６……
コントロールユニツト、４０……負荷センサ、４
１……回転数センサ。 FIG. 1 is an overall configuration diagram for clearly showing the configuration of this invention. Fig. 2 is a schematic diagram showing the mechanical configuration of the first embodiment of this invention, Fig. 3 is a flowchart explaining the operations performed within the control unit in Fig. 2, and Fig. 4 is a diagram showing the constant boost pressure. A characteristic diagram that overlaps region A where intake air is required to be released for value control and region B where air introduction is required for particulate combustion. Figure 5 shows when the accelerator pedal is depressed. FIG. 3 is a characteristic diagram of the boost pressure and the oxygen concentration in the exhaust gas, illustrating the effect of this embodiment when acceleration is performed. Fig. 6 is a schematic diagram showing the mechanical configuration of the second embodiment of this invention, Fig. 7 is a flowchart showing the operations performed within the control unit in Fig. 6, and Fig. 8 is a characteristic diagram of the amount of intake air release. be.
Figure 9 is a schematic diagram of a conventional exhaust purification device;
The figure is also a schematic diagram of the supercharging pressure control means. 1...Exhaust passage, 2...Catalyst carrying filter, 3
... Insulation material, 12 ... Intake passage, 15 ... Turbocharger, 16 ... Exhaust turbine, 17 ... Intake compressor, 20 ... Intake relief passage, 21 ...
... Valve means, 22 ... Boost pressure control means, 23 ... Operating state detection means, 25 ... Pressure sensor, 26 ...
Control unit, 40...Load sensor, 4
1...Rotation speed sensor.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

エンジンの高負荷域に吸気コンプレツサ下流の
予圧空気を吸気逃し通路を介して排気通路に逃す
ターボチヤージヤの過給圧制御手段を備えるデイ
ーゼルエンジンにおいて、排気タービン下流に排
気中のパーテイキユレートを捕集して酸化燃焼さ
せる触媒担持フイルタを介装するとともに、前記
吸気逃し通路を該フイルタ上流に開口したことを
特徴とするデイーゼルエンジンの排気浄化装置。 In a diesel engine that is equipped with a turbocharger supercharging pressure control means that releases pre-pressure air downstream of the intake compressor into the exhaust passage via the intake relief passage in the high load range of the engine, particulates in the exhaust are collected downstream of the exhaust turbine. 1. An exhaust gas purification device for a diesel engine, characterized in that a catalyst-carrying filter for oxidizing combustion is interposed, and the intake air passage is opened upstream of the filter.