JPH0161910U - - Google Patents
Info
- Publication number
- JPH0161910U JPH0161910U JP15487487U JP15487487U JPH0161910U JP H0161910 U JPH0161910 U JP H0161910U JP 15487487 U JP15487487 U JP 15487487U JP 15487487 U JP15487487 U JP 15487487U JP H0161910 U JPH0161910 U JP H0161910U
- Authority
- JP
- Japan
- Prior art keywords
- filter
- differential pressure
- determining means
- excessive
- time
- 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
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 3
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 claims 1
- 239000000446 fuel Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
第１図は本考案のフイルタ診断装置を備えたデ
イーゼルエンジンの潤滑油系の模式図、第２図は
第１図のフイルタに設けられた差圧センサで検出
されるフイルタ差圧の経時変化の一例を示す図、
第３図は第１図のコンピユータの診断処理の流れ
を示すフローチヤートである。
１……タンク、２……ポンプ、５……フイルタ
、６……差圧センサ、７……コンピユータ、８…
…表示装置、１０……ピストン給油管、１１……
ピストン、１２……軸受給油管、１３……クラン
ク軸、１５……戻り管、１６……オイルパン。
Figure 1 is a schematic diagram of the lubricating oil system of a diesel engine equipped with the filter diagnostic device of the present invention, and Figure 2 shows the change over time in the filter differential pressure detected by the differential pressure sensor installed on the filter in Figure 1. A diagram showing an example,
FIG. 3 is a flowchart showing the flow of diagnostic processing of the computer shown in FIG. 1...Tank, 2...Pump, 5...Filter, 6...Differential pressure sensor, 7...Computer, 8...
... Display device, 10 ... Piston oil supply pipe, 11 ...
Piston, 12...bearing oil supply pipe, 13...crankshaft, 15...return pipe, 16...oil pan.
Claims (1)
けられるフイルタの閉塞や破損を診断するフイル
タ診断装置であつて、 上記フイルタの前後の液体の圧力差を検出する
差圧センサと、判断時よりも一定時間前までの期
間において上記差圧センサで検出された検出信号
の最大値を保持する最大値保持手段と、上記判断
時の検出信号と上記最大値を比較して、判断時の
フイルタ差圧が過大であるか否かを判別する差圧
判別手段と、この差圧判別手段でフイルタ差圧が
過大であると判別されたとき、内燃機関が暖機運
転中であるか否かを判別する暖機運転判別手段と
を備えて、上記差圧判別手段がフイルタ差圧が過
大であると判別し、かつ上記暖機運転判別手段が
暖機運転中でないと判別したときに、上記フイル
タが閉塞し、あるいは閉塞気味であると診断する
ようにしたことを特徴とするフイルタ診断装置。 (2) 上記実用新案登録請求の範囲第１項に記載
のフイルタ診断装置において、上記フイルタ差圧
判別手段でフイルタ差圧が過大でないと判別され
たとき、上記判断時の検出信号が表わすフイルタ
差圧と所定のフイルタ差圧基準値との偏差を算出
し、この偏差が過大であるか否かを判別するとと
もに、上記偏差が過大であると判別したとき、フ
イルタの累積使用時間を所定のメインテナンス時
間と比較して、フイルタ交換の要否を判別するフ
イルタ交換判別手段を備えたことを特徴とするフ
イルタ診断装置。[Scope of Claim for Utility Model Registration] (1) A filter diagnostic device for diagnosing blockage or damage to a filter installed in the lubricating oil system or fuel supply system of an internal combustion engine, which detects the pressure difference between the liquid before and after the filter. A differential pressure sensor to detect, a maximum value holding means for holding the maximum value of the detection signal detected by the differential pressure sensor during a period up to a certain period of time before the determination, and the detection signal at the time of the determination and the maximum value. differential pressure determining means for determining whether or not the filter differential pressure at the time of determination is excessive by comparing the filter differential pressure; warm-up operation determining means for determining whether or not the engine is in operation; the differential pressure determining means determines that the filter differential pressure is excessive, and the warm-up operation determining means determines that the engine is in warm-up operation. A filter diagnostic device characterized in that, when it is determined that the filter is not, it is diagnosed that the filter is clogged or is likely to be clogged. (2) In the filter diagnostic device according to claim 1 of the above utility model registration claim, when the filter differential pressure determining means determines that the filter differential pressure is not excessive, the filter difference indicated by the detection signal at the time of the determination is determined. The deviation between the pressure and a predetermined filter differential pressure reference value is calculated, and it is determined whether or not this deviation is excessive. When the deviation is determined to be excessive, the cumulative usage time of the filter is determined by the predetermined maintenance. A filter diagnostic device characterized by comprising a filter replacement determining means for determining whether filter replacement is necessary or not by comparing with time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987154874U JPH0422808Y2 (en) | 1987-10-07 | 1987-10-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987154874U JPH0422808Y2 (en) | 1987-10-07 | 1987-10-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0161910U true JPH0161910U (en) | 1989-04-20 |
| JPH0422808Y2 JPH0422808Y2 (en) | 1992-05-26 |
Family
ID=31431993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987154874U Expired JPH0422808Y2 (en) | 1987-10-07 | 1987-10-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0422808Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009156174A (en) * | 2007-12-27 | 2009-07-16 | Nissan Diesel Motor Co Ltd | Device for determining fuel filter replacement timing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5884015A (en) * | 1981-11-13 | 1983-05-20 | Hitachi Constr Mach Co Ltd | Alarming device in filter |
| JPS60100012U (en) * | 1983-12-15 | 1985-07-08 | 日立建機株式会社 | Filter clogging alarm device |
-
1987
- 1987-10-07 JP JP1987154874U patent/JPH0422808Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5884015A (en) * | 1981-11-13 | 1983-05-20 | Hitachi Constr Mach Co Ltd | Alarming device in filter |
| JPS60100012U (en) * | 1983-12-15 | 1985-07-08 | 日立建機株式会社 | Filter clogging alarm device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009156174A (en) * | 2007-12-27 | 2009-07-16 | Nissan Diesel Motor Co Ltd | Device for determining fuel filter replacement timing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0422808Y2 (en) | 1992-05-26 |
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