JPH0387859U - - Google Patents
Info
- Publication number
- JPH0387859U JPH0387859U JP14693389U JP14693389U JPH0387859U JP H0387859 U JPH0387859 U JP H0387859U JP 14693389 U JP14693389 U JP 14693389U JP 14693389 U JP14693389 U JP 14693389U JP H0387859 U JPH0387859 U JP H0387859U
- Authority
- JP
- Japan
- Prior art keywords
- recirculation
- negative pressure
- pressure switch
- gas
- turns
- 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 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
第１図は本考案に係るＥＧＲ故障診断装置の一
実施例及びその周辺部分の概略構成図、第２図は
同実施例における絞り部及び負圧スイツチの拡大
断面図、第３図は同負圧スイツチの動作説明のた
めの状態変化特性図である。
１……ＥＧＲバルブ、２……エキゾーストマニ
ホルド、３……インテークマニホルド、４，５…
…再循環通路、６……弁、１０……制御装置、１
１……負圧スイツチ、１２……絞り部、２１……
ダイヤフラム、２４，２５……接点。
Fig. 1 is a schematic configuration diagram of an embodiment of the EGR failure diagnosis device according to the present invention and its surrounding parts, Fig. 2 is an enlarged sectional view of the throttle part and negative pressure switch in the embodiment, and Fig. 3 is the same FIG. 4 is a state change characteristic diagram for explaining the operation of the pressure switch. 1...EGR valve, 2...Exhaust manifold, 3...Intake manifold, 4, 5...
... recirculation passage, 6 ... valve, 10 ... control device, 1
1... Negative pressure switch, 12... Throttle section, 21...
Diaphragm, 24, 25... Contact.
Claims (1)
ド間に排気ガスの再循環量を調節するＥＧＲバル
ブを設けて、エンジンの運転状態に対応して、適
量の排気ガスを吸入混合気中に再循環させる排気
ガス再循環（これを「ＥＧＲ」という）装置の故
障診断装置であつて、 前記ＥＧＲバルブからインテークマニホルドへ
再循環ガスを送る再循環通路内に設けられた絞り
部と、 前記再循環ガスの流れにより生じる前記絞り部
の前後の圧力差の有無により、オン・オフする負
圧スイツチと、 該負圧スイツチのオン・オフ状態に基づいてＥ
ＧＲバルブが正常に作動しているか否かを判別す
る作動判別手段とを具備することを特徴とするＥ
ＧＲ故障診断装置。[Claim for Utility Model Registration] An EGR valve is installed between the exhaust manifold and the intake manifold to adjust the amount of exhaust gas recirculated. A failure diagnosis device for a circulating exhaust gas recirculation (hereinafter referred to as "EGR") device, comprising: a constriction section provided in a recirculation passage that sends recirculation gas from the EGR valve to an intake manifold; and the recirculation system. A negative pressure switch that turns on and off depending on the presence or absence of a pressure difference before and after the throttle part caused by the flow of gas, and a negative pressure switch that turns on and off based on the on/off state of the negative pressure switch.
E characterized by comprising operation determination means for determining whether or not the GR valve is operating normally.
GR failure diagnosis device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14693389U JPH0387859U (en) | 1989-12-20 | 1989-12-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14693389U JPH0387859U (en) | 1989-12-20 | 1989-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0387859U true JPH0387859U (en) | 1991-09-06 |
Family
ID=31693468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14693389U Pending JPH0387859U (en) | 1989-12-20 | 1989-12-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0387859U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57165656A (en) * | 1981-04-07 | 1982-10-12 | Nissan Motor Co Ltd | Egr device of diesel engine |
| JPS6135374A (en) * | 1984-07-27 | 1986-02-19 | Yokogawa Hokushin Electric Corp | Inspecting device for digital circuit |
| JPS6375345A (en) * | 1986-09-16 | 1988-04-05 | Nissan Motor Co Ltd | Trouble diagnosing device for exhaust reflux device |
-
1989
- 1989-12-20 JP JP14693389U patent/JPH0387859U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57165656A (en) * | 1981-04-07 | 1982-10-12 | Nissan Motor Co Ltd | Egr device of diesel engine |
| JPS6135374A (en) * | 1984-07-27 | 1986-02-19 | Yokogawa Hokushin Electric Corp | Inspecting device for digital circuit |
| JPS6375345A (en) * | 1986-09-16 | 1988-04-05 | Nissan Motor Co Ltd | Trouble diagnosing device for exhaust reflux device |
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