JPH0224058U - - Google Patents
Info
- Publication number
- JPH0224058U JPH0224058U JP10115588U JP10115588U JPH0224058U JP H0224058 U JPH0224058 U JP H0224058U JP 10115588 U JP10115588 U JP 10115588U JP 10115588 U JP10115588 U JP 10115588U JP H0224058 U JPH0224058 U JP H0224058U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- region
- gas recirculation
- diagnosis
- failure
- 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.)
- Pending
Links
- 238000003745 diagnosis Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000003134 recirculating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
第１図は本考案に係る排気還流装置の故障診断
装置のクレーム対応図、第２図は同上装置の一実
施例を示す概略構成図、第３図は同上実施例の作
用を示すフローチヤート、第４図は排気還流域と
診断領域の関係を示す特性図である。
２ａ……補助空気通路、４……排気還流通路、
５……排気還流弁、６……スロツトルバルブ、７
……温度センサ、１１……クランク角センサ、１
２……コントロールユニツト、１３……燃料噴射
パルス演算手段、１４……運転領域判別手段、１
５……故障診断手段、１７……ソレノイドバルブ
、１８……スイツチ、１９……診断領域変化手段
。
FIG. 1 is a complaint correspondence diagram of a failure diagnosis device for an exhaust gas recirculation device according to the present invention, FIG. 2 is a schematic configuration diagram showing an embodiment of the same device, and FIG. 3 is a flowchart showing the operation of the same embodiment. FIG. 4 is a characteristic diagram showing the relationship between the exhaust gas recirculation area and the diagnosis area. 2a...Auxiliary air passage, 4...Exhaust recirculation passage,
5... Exhaust recirculation valve, 6... Throttle valve, 7
... Temperature sensor, 11 ... Crank angle sensor, 1
2...Control unit, 13...Fuel injection pulse calculation means, 14...Operating region determination means, 1
5... Failure diagnosis means, 17... Solenoid valve, 18... Switch, 19... Diagnosis area changing means.
Claims (1)
エンジン回転数と燃料噴射パルス幅とを用いて予
め設定した診断領域内にあるか否かを判定する運
転領域判定手段と、該手段が診断領域内にあると
判定した時に排気の還流の有無に基づき排気還流
装置の故障の有無を診断する故障診断手段と、前
記診断領域をスロツトルバルブのバイパス空気量
に応じて変化させる診断領域変化手段と、を備え
たことを特徴とする排気還流装置の故障診断装置
。 an operating region determining means comprising an exhaust recirculation valve and determining whether or not operating conditions are within a preset diagnostic region using engine rotational speed and fuel injection pulse width within the exhaust gas recirculating region; a failure diagnosis means for diagnosing the presence or absence of a failure of the exhaust gas recirculation device based on the presence or absence of exhaust gas recirculation when it is determined that the exhaust gas recirculation is within the range; and a diagnosis region changing means for changing the diagnosis region according to the amount of bypass air of the throttle valve. A failure diagnosis device for an exhaust gas recirculation device, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10115588U JPH0224058U (en) | 1988-08-01 | 1988-08-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10115588U JPH0224058U (en) | 1988-08-01 | 1988-08-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0224058U true JPH0224058U (en) | 1990-02-16 |
Family
ID=31329893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10115588U Pending JPH0224058U (en) | 1988-08-01 | 1988-08-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224058U (en) |
-
1988
- 1988-08-01 JP JP10115588U patent/JPH0224058U/ja active Pending