JPH0341112U

JPH0341112U -

Info

Publication number: JPH0341112U
Application number: JP9903589U
Authority: JP
Priority date: 1989-08-28
Filing date: 1989-08-28
Publication date: 1991-04-19

Description

[Brief explanation of drawings]

第１図は本考案によるパテイキユレートトラツ
プ再生時期判断装置を備えたエンジン構成図；第
２図は本考案による上記装置の作動を示すフロー
チヤート図；第３図は第２図ステツプ２３にて用
いられる、再生時期判断のための吸入空気流量所
定値Ｑ_ｏの一例としてのマツプ図；第４図は第２
図ステツプ２３にて用いられる正常再生後の吸入
空気流量Ｑ_ａを示す一例としてのマツプ図；第５
図は第２図フローチヤートに類似し、その所定値
補正法が異なるフローチヤート図；第６図は第４
図マツプに類似し、再生時期を吸気体積効率η_ｖ
ｏの値で判断する際使用される一例としてのマツ
プ図；第７図は第５図に類似し、正常再生後の吸
気体積効率η_ｖｏを示す一例としてのマツプ図。１……エンジン本体、８……パテイキユレート
トラツプ、９……エンジン回転数センサ、１１…
…アクセルセンサ、１２……エアフロメータ、１
３……制御回路（ＥＣＵ）。 Fig. 1 is a block diagram of an engine equipped with a particulate trap regeneration timing determining device according to the present invention; Fig. 2 is a flow chart showing the operation of the above device according to the present invention; A map diagram as an example of the intake air flow rate predetermined value _Qo used for determining the regeneration timing;
Map diagram as an example showing the intake air flow rate Q _a after normal regeneration used in step 23;
The figure is similar to the flowchart in Figure 2, but the predetermined value correction method is different; Figure 6 is the flowchart in Figure 4.
Similar to the figure map, the regeneration time is determined by the intake volumetric efficiency η _v A map diagram as an example used when making a judgment based on the value of _o ; FIG. 7 is a map diagram similar to FIG. 5 as an example showing the intake volumetric efficiency η _vo after normal regeneration. DESCRIPTION OF SYMBOLS 1...Engine body, 8...Particulate trap, 9...Engine speed sensor, 11...
... Accelerator sensor, 12 ... Air flow meter, 1
3...Control circuit (ECU).

Claims

[Scope of Claim for Utility Model Registration] A device for determining the regeneration timing for heating and regeneration of a diesel particulate trap installed in the exhaust passage of a diesel engine, which determines the amount of intake air to the engine in the current operating state. , or an intake air calculation means for calculating the intake air volume efficiency, and an intake air amount obtained by the intake air calculation means,
or a particulate filter having means for comparing the intake air volume efficiency with a predetermined value predetermined in accordance with the operating state and determining that it is time for trap regeneration if the intake air amount or intake volume efficiency is smaller than the predetermined value. Trap regeneration timing judgment device.