JPH0220761U - - Google Patents
Info
- Publication number
- JPH0220761U JPH0220761U JP9837488U JP9837488U JPH0220761U JP H0220761 U JPH0220761 U JP H0220761U JP 9837488 U JP9837488 U JP 9837488U JP 9837488 U JP9837488 U JP 9837488U JP H0220761 U JPH0220761 U JP H0220761U
- Authority
- JP
- Japan
- Prior art keywords
- amount
- intake air
- downstream pressure
- throttle
- air
- 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
- 238000003745 diagnosis Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の一実施例に係わるスロツトル
開度検出器の故障診断装置を示す構成図、第２図
は下流圧―流量特性を示す図、第３図は主、副ス
ロツトル弁特性を示す図、第４図及び第５図は従
来のスロツトルセンサエラー検出を説明するため
の図である。
３１……エアクリーナ、３２……流量計、３３
……スロツトル弁、４０……下流圧推定部、４１
……推定流量算出部、４３……判定部。
Fig. 1 is a configuration diagram showing a failure diagnosis device for a throttle opening detector according to an embodiment of the present invention, Fig. 2 is a diagram showing downstream pressure-flow characteristics, and Fig. 3 is a diagram showing main and sub-throttle valve characteristics. 4 and 5 are diagrams for explaining conventional throttle sensor error detection. 31... Air cleaner, 32... Flow meter, 33
... Throttle valve, 40 ... Downstream pressure estimation section, 41
... Estimated flow rate calculation section, 43 ... Judgment section.
Claims (1)
送り込まれる吸入空気量を検出する流量計と、上
記スロツトル弁の開度を検出するスロツトルセン
サと、この流量計により検出された吸入空気量に
応じた上記スロツトル弁の下流圧を推定出力する
下流圧推定手段と、上記スロツトルセンサにより
検出されるスロツトル弁開度と上記下流圧推定手
段から出力される推定下流圧から上記エアクリー
ナから送り込まれる吸入空気量を推定する流量推
定手段と、上記流量計により検出される実際の吸
入空気量と流量推定手段から出力される推定吸入
空気量とを比較する比較部とを具備し、上記実際
の吸入空気量と上記推定吸入空気量とに差がある
場合にはスロツトルセンサのエラーとしたことを
特徴とするスロツトル開度検出器の故障診断装置
。 A flow meter arranged upstream of the throttle valve to detect the amount of intake air sent from the air cleaner, a throttle sensor to detect the opening degree of the throttle valve, and the throttle valve according to the amount of intake air detected by the flow meter. downstream pressure estimating means for estimating and outputting the downstream pressure of the air cleaner, and estimating the amount of intake air sent from the air cleaner based on the throttle valve opening detected by the throttle sensor and the estimated downstream pressure output from the downstream pressure estimating means. The apparatus includes a flow rate estimating means and a comparison section that compares the actual intake air amount detected by the flow meter and the estimated intake air amount output from the flow rate estimating means. A failure diagnosis device for a throttle opening detector, characterized in that if there is a difference between the amount of air and the amount of air, it is determined as an error in the throttle sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9837488U JPH0649876Y2 (en) | 1988-07-27 | 1988-07-27 | Failure diagnosis device for throttle opening detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9837488U JPH0649876Y2 (en) | 1988-07-27 | 1988-07-27 | Failure diagnosis device for throttle opening detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0220761U true JPH0220761U (en) | 1990-02-13 |
| JPH0649876Y2 JPH0649876Y2 (en) | 1994-12-14 |
Family
ID=31324580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9837488U Expired - Lifetime JPH0649876Y2 (en) | 1988-07-27 | 1988-07-27 | Failure diagnosis device for throttle opening detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0649876Y2 (en) |
-
1988
- 1988-07-27 JP JP9837488U patent/JPH0649876Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0649876Y2 (en) | 1994-12-14 |
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