JPH021454U - - Google Patents
Info
- Publication number
- JPH021454U JPH021454U JP7579788U JP7579788U JPH021454U JP H021454 U JPH021454 U JP H021454U JP 7579788 U JP7579788 U JP 7579788U JP 7579788 U JP7579788 U JP 7579788U JP H021454 U JPH021454 U JP H021454U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- sampling
- control device
- gas recirculation
- recirculation control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005070 sampling Methods 0.000 claims 10
- 238000004092 self-diagnosis Methods 0.000 claims 6
- 230000001052 transient effect Effects 0.000 claims 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
第１図は本考案を説明するためのブロツク図、
第２図は本考案の一実施例の構成図、第３図〜第
６図は同上実施例の故障診断の制御フローチヤー
ト、第７図はサージトルクとＥＧＲ量との関係を
示す図、第８図は従来の診断方法を説明するため
の図である。
１……機関本体、３……排気通路、４……ＥＧ
Ｒ通路、５……ＥＧＲ制御弁、６……吸気通路、
９……コントロールユニツト、１０……スロツト
ルバルブ、１１……クランク角センサ、１３……
スロツトルセンサ。
Figure 1 is a block diagram for explaining the present invention.
FIG. 2 is a configuration diagram of an embodiment of the present invention, FIGS. 3 to 6 are control flowcharts for fault diagnosis of the same embodiment, FIG. 7 is a diagram showing the relationship between surge torque and EGR amount, and FIG. FIG. 8 is a diagram for explaining a conventional diagnostic method. 1...Engine body, 3...Exhaust passage, 4...EG
R passage, 5...EGR control valve, 6...Intake passage,
9... Control unit, 10... Throttle valve, 11... Crank angle sensor, 13...
Throttle sensor.
Claims (1)
排気還流量を制御する排気還流制御装置の自己診
断装置において、機関回転速度検出手段と、該機
関回転速度検出手段で検出した機関回転速度を一
定時間間隔でサンプリングする機関回転速度サン
プリング手段と、該機関回転速度サンプリング手
段のサンプリング値に基づいて単位時間当りの機
関回転速度変動を所定時間内で複数サンプリング
する機関回転速度変動サンプリング手段と、該機
関回転速度変動サンプリング手段のサンプリング
値における最大値と予め定めた設定値とを比較し
両者の差が所定値以上のとき前記排気還流制御装
置が異常と判定する判定手段とを備えたことを特
徴とする排気還流制御装置の自己診断装置。 (2) 請求項１記載の排気還流制御装置の自己診
断装置において、前記判定手段に代えて、機関回
転速度変動サンプリング手段の最大サンプリング
値の値に応じて排気還流制御装置の故障度合を複
数段階で判定する判定手段を設けたことを特徴と
する排気還流制御装置の自己診断装置。 (3) 請求項１又は２記載の排気還流制御装置の
自己診断装置において、過渡運転状態検出手段と
、過渡運転状態が検出されてから一定時間の間判
定手段の判定動作を停止する判定停止手段とを設
けたことを特徴とする排気還流制御装置の自己診
断装置。[Scope of Claim for Utility Model Registration] (1) A self-diagnosis device for an exhaust gas recirculation control device that controls the amount of exhaust gas recirculated to an intake passage according to engine operating conditions, comprising: an engine rotation speed detection means; An engine rotation speed sampling means for sampling the engine rotation speed detected by the means at fixed time intervals, and an engine for sampling engine rotation speed fluctuations per unit time multiple times within a predetermined time based on the sampling value of the engine rotation speed sampling means. A rotational speed fluctuation sampling means compares a maximum value among the sampling values of the engine rotational speed fluctuation sampling means with a predetermined set value, and when the difference between the two is a predetermined value or more, the exhaust gas recirculation control device is determined to be abnormal. 1. A self-diagnosis device for an exhaust gas recirculation control device, comprising: means. (2) In the self-diagnosis device for an exhaust gas recirculation control device according to claim 1, in place of the determining means, the degree of failure of the exhaust gas recirculation control device is determined in a plurality of stages according to the maximum sampling value of the engine rotational speed fluctuation sampling means. 1. A self-diagnosis device for an exhaust gas recirculation control device, characterized in that it is provided with a determination means for making a determination. (3) The self-diagnosis device for an exhaust gas recirculation control device according to claim 1 or 2, comprising: a transient operating state detecting means; and a determination stopping means for stopping the determining operation of the determining means for a certain period of time after the transient operating state is detected. A self-diagnosis device for an exhaust gas recirculation control device, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988075797U JPH0640920Y2 (en) | 1988-06-09 | 1988-06-09 | Exhaust gas recirculation control device self-diagnosis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988075797U JPH0640920Y2 (en) | 1988-06-09 | 1988-06-09 | Exhaust gas recirculation control device self-diagnosis device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH021454U true JPH021454U (en) | 1990-01-08 |
| JPH0640920Y2 JPH0640920Y2 (en) | 1994-10-26 |
Family
ID=31300851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988075797U Expired - Lifetime JPH0640920Y2 (en) | 1988-06-09 | 1988-06-09 | Exhaust gas recirculation control device self-diagnosis device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640920Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6393455U (en) * | 1986-12-08 | 1988-06-16 |
-
1988
- 1988-06-09 JP JP1988075797U patent/JPH0640920Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6393455U (en) * | 1986-12-08 | 1988-06-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0640920Y2 (en) | 1994-10-26 |
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