JPS5936689Y2 - engine air intake device - Google Patents
engine air intake deviceInfo
- Publication number
- JPS5936689Y2 JPS5936689Y2 JP1979145827U JP14582779U JPS5936689Y2 JP S5936689 Y2 JPS5936689 Y2 JP S5936689Y2 JP 1979145827 U JP1979145827 U JP 1979145827U JP 14582779 U JP14582779 U JP 14582779U JP S5936689 Y2 JPS5936689 Y2 JP S5936689Y2
- Authority
- JP
- Japan
- Prior art keywords
- cleaner
- contact piece
- pipe
- pressure
- air intake
- 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.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Description
【考案の詳細な説明】 本考案はエンジンの空気取入装置に関するものである。[Detailed explanation of the idea] The present invention relates to an air intake device for an engine.
従来、この種の空気取入装置としては例えば第１図に示
す如く、エンジン１の吸気管２を主エアクリーナ３、プ
リクリーナ４を経て大気に開口しプリクリーナ４で粗大
ゴミを除去し、主エアクリーナ３で微細ゴミを除去して
消浄な空気をエンジン１内に取入れるようにすると共に
、排気管５を排気マフラ６に接続し、排気マフラ６の紋
り部７にプリクリーナ４内に開口接続したパイプ８の先
端部８ａを臨ませて紋り部７の圧力降下を利用して負圧
を発生させ、その負圧でブリクリーナ４内に捕集した粗
大ゴミをパイプ８を経て排気マフラ６より排気ガスとと
もに大気に放出するようにしたものが知られている。Conventionally, this type of air intake device, as shown in FIG. At the same time, the air cleaner 3 removes fine dust and introduces purified air into the engine 1. At the same time, the exhaust pipe 5 is connected to the exhaust muffler 6, and the ridge 7 of the exhaust muffler 6 is connected to the pre-cleaner 4. The tip 8a of the open-connected pipe 8 is exposed, and the pressure drop of the crest 7 is used to generate negative pressure, and the negative pressure is used to transport the bulky debris collected in the brick cleaner 4 through the pipe 8 to the exhaust muffler. 6 is known to be released into the atmosphere together with exhaust gas.
しかし、この構造であるとプリクリーナ４が目詰りした
場合、紋り部７に発生する負圧Ｐ１よりもプリクリーナ
通過後に発生する負圧Ｐ２が大きくなって排気ガスがパ
イプ８よりプリクリーナ４側に流入してしまう。However, with this structure, if the pre-cleaner 4 becomes clogged, the negative pressure P2 generated after passing through the pre-cleaner becomes larger than the negative pressure P1 generated at the ridge 7, and the exhaust gas flows from the pipe 8 to the pre-cleaner 4. It flows into the side.
このために、パイプクリーナ４内の粗大ゴミを大気に放
出できないと共に、高温の排気ガスによりプリクリーナ
４、主エアクリーナ３が汚れたり、焼損したりしてしま
う。For this reason, the bulky debris in the pipe cleaner 4 cannot be released into the atmosphere, and the pre-cleaner 4 and main air cleaner 3 are contaminated or burnt out by the high-temperature exhaust gas.
本考案は上記の事情に鑑みなされたものであり、その目
的は排気ガスのプリクリーナ側への逆流を検知できるよ
うにしたエンジンの空気取入装置を提供することである
。The present invention was developed in view of the above circumstances, and its purpose is to provide an air intake device for an engine that can detect the backflow of exhaust gas toward the precleaner side.
以下第２図を参照して本考案の実施例を説明する。An embodiment of the present invention will be described below with reference to FIG.
なお従来と同一部材は符号を同一 として説明を省略す
る。Note that members that are the same as those in the conventional system are given the same reference numerals and their explanations will be omitted.
パイプ８には括れ部９が形成され、該括れ部９には第１
圧力検出管（動圧測定部） １０が設けられ、括れ部９
より紋り部７側には第２圧力検出管（静圧測定部）１１
が設けである。A constricted portion 9 is formed in the pipe 8, and a first constricted portion 9 is formed in the constricted portion 9.
A pressure detection tube (dynamic pressure measuring section) 10 is provided, and a constricted portion 9
A second pressure detection tube (static pressure measurement section) 11 is installed on the side of the ridged portion 7.
is the provision.
１２は差圧検出器であり、容器１３内をダイヤフラム１
４で第１、第２室１５．１６に区分し、第１室１５を前
記動圧測定部１０に、第２室１６を前記静圧測定部１１
に接続しであると共に、第１室１５内には固定接片１７
と可動接片１８とが相対向しかつ可動接片１８がダイヤ
フラム１４側に位置するように設けてあり、固定接片１
７と可動接片１８とは警告器１９とソレノイド２０との
電源回路２１に接続しである。12 is a differential pressure detector, which detects the inside of the container 13 by diaphragm 1.
4 into first and second chambers 15 and 16, the first chamber 15 is connected to the dynamic pressure measuring section 10, and the second chamber 16 is connected to the static pressure measuring section 11.
In addition, there is a fixed contact piece 17 in the first chamber 15.
and the movable contact piece 18 are provided so that they face each other and the movable contact piece 18 is located on the diaphragm 14 side, and the fixed contact piece 1
7 and the movable contact piece 18 are connected to the power supply circuit 21 of the warning device 19 and the solenoid 20.
２２は電源である。22 is a power source.
しかして、プリクリーナ４が目詰りせずに紋り部７側の
負圧Ｐ１がプリクリーナ４側の負圧Ｐ２よりも大きい場
合はパイプ８内には矢印イ方向に空気が流れる。If the pre-cleaner 4 is not clogged and the negative pressure P1 on the side of the ridge 7 is greater than the negative pressure P2 on the side of the pre-cleaner 4, air flows in the pipe 8 in the direction of arrow A.
このために、動圧測定部１０の圧力ＰＡが静圧測定部１
１の圧力ＰＢよりも高くなり、第１室１５内の圧力が第
２室１６内の圧力よりも高くなってダイヤフラム１４が
第２室１６側に変形するので固定接片１７と可動接片１
８とは離れ警告器１９、ソレノイド２０は動作しない。For this reason, the pressure PA of the dynamic pressure measuring section 10 is
1, the pressure in the first chamber 15 becomes higher than the pressure in the second chamber 16, and the diaphragm 14 deforms toward the second chamber 16. Therefore, the fixed contact piece 17 and the movable contact piece 1
8, the warning device 19 and solenoid 20 do not operate.
また、パイプクリーナ４が目詰りして負圧Ｐ１が負圧Ｐ
２よりも小さくなてとパイプ８内には矢印口のように排
気ガスが逆流する。In addition, the pipe cleaner 4 is clogged and the negative pressure P1 becomes negative pressure P1.
2, exhaust gas flows backward into the pipe 8 as indicated by the arrow.
このために、動圧測定部１０の圧力ＰＡが静圧測定部１
１の圧力ＰＢよりも小さくなり、ダイヤフラム１４が第
１室１５側に変形され可動接片１８は固定接片１７に接
触するので警告器１９、ソレノイド２０が動作する。For this reason, the pressure PA of the dynamic pressure measuring section 10 is
1, the diaphragm 14 is deformed toward the first chamber 15, and the movable contact piece 18 comes into contact with the fixed contact piece 17, so that the warning device 19 and the solenoid 20 operate.
したがって、排気ガスが逆流したことを検知でき、プリ
クリーナ４の清掃などの処置できる。Therefore, it is possible to detect that the exhaust gas has flowed back, and take measures such as cleaning the pre-cleaner 4.
また、ソレノイド２０を燃料供給系に設けた電磁開閉弁
に接続してソレノイド２０がＯＮとなったときに電磁開
閉弁が閉となるようにすれば自動的にエンジンを停止で
き、プリクリーナ４、主エアクリーナ３の汚れ、焼損な
どを未然に防止できる。Furthermore, if the solenoid 20 is connected to an electromagnetic on-off valve provided in the fuel supply system so that the electromagnetic on-off valve closes when the solenoid 20 is turned on, the engine can be stopped automatically, and the pre-cleaner 4, It is possible to prevent the main air cleaner 3 from becoming dirty or burnt out.
本考案は以上の様になり、パイプ８内をプリクリーナ４
より排気マフラ６側に向けて空気が流れる時には第１圧
力検出管１０の検出圧力が第２圧力検出管１１の検出圧
力よりも高くなり、ダイヤフラム１４は第２室１６側に
変位して、可動接片１８と固定接片１７とは離れるから
警告器１９は作動しない。The present invention is as described above, and the inside of the pipe 8 is cleaned by the pre-cleaner 4.
When air flows more toward the exhaust muffler 6 side, the pressure detected by the first pressure detection tube 10 becomes higher than the pressure detected by the second pressure detection tube 11, and the diaphragm 14 is displaced toward the second chamber 16 side, making it movable. Since the contact piece 18 and the fixed contact piece 17 are separated, the warning device 19 does not operate.
また、排気マフラ６よりプリクリーナ４側に空気が流れ
ると第１圧力検出管１０の検出圧力よりも第２圧力検出
管１１の検出圧力が高くなり、ダイヤフラム１４は第１
室１５側に変位して可動接片１８と固定接片１７とが接
して警告器１９が作動してプリクリーナ４の目詰り、つ
まり排気ガスの逆流を検出できる。Furthermore, when air flows from the exhaust muffler 6 to the pre-cleaner 4 side, the pressure detected by the second pressure detection tube 11 becomes higher than the pressure detected by the first pressure detection tube 10, and the diaphragm 14
When the movable contact piece 18 and the fixed contact piece 17 are moved toward the chamber 15 and come into contact with each other, the warning device 19 is activated to detect clogging of the pre-cleaner 4, that is, backflow of exhaust gas.
また、第１、第２圧力検出管１０．１１によって括れ部
９とそれ以外との差圧を検出して可動接片１８と固定接
片１７とを接離するので、差圧の絶対値の変位で排気ガ
スの逆流を検出でき、空気の流れを利用していないから
、その構成が簡単となる。In addition, since the first and second pressure detection tubes 10.11 detect the differential pressure between the constricted portion 9 and the rest, and move the movable contact piece 18 and the fixed contact piece 17 toward and away from each other, the absolute value of the differential pressure is Since the backflow of exhaust gas can be detected by displacement and does not use air flow, the configuration is simple.
第１図は従来例の説明図、第２図は本来案の実施例を示
す説明図である。
２は吸気管、３は主エアクリーナ、４はプリクリーナ、
６は排気マフラ、７は紋り部、８はパイプ、９は括れ部
、１０．１１は圧力測定部、１７．１８は接片、１９は
警告器、２１は電源回路。FIG. 1 is an explanatory diagram of a conventional example, and FIG. 2 is an explanatory diagram showing an originally proposed embodiment. 2 is the intake pipe, 3 is the main air cleaner, 4 is the pre-cleaner,
6 is an exhaust muffler, 7 is a crest, 8 is a pipe, 9 is a constriction, 10.11 is a pressure measuring part, 17.18 is a contact piece, 19 is a warning device, and 21 is a power supply circuit.
Claims (1)
ナ４を通して大気に開口し、プリクリーナ４をパイプ８
を介して排気マフラ６の絞り部７に接続連通した空気取
入装置において、前記パイプ８に括れ部９を形成し、該
括れ部９に第１圧力検出管１０を臨ませ、この括れ部９
よりも排気マフラ６側には第２圧力検出管１１を臨ませ
ると共に、ダイヤフラム１４で区分された容器１３内の
第１、第２室１５．１６に前記第１、第２圧力検出管１
０．１１を接続連通し、この第１室１５にはダイヤフラ
ム１４に設けた可動接片１８と対向する固定接片１７を
設け、この可動接片１８と固定接片１７とを警告器１９
の電源回路２１に接続したことを特徴とするエンジンの
空気取入装置。The intake pipe 2 of the engine 1 is opened to the atmosphere through the main air cleaner 3 and the pre-cleaner 4, and the pre-cleaner 4 is connected to the pipe 8.
In the air intake device, which is connected to and communicates with the constricted part 7 of the exhaust muffler 6 through the pipe 8, a constricted part 9 is formed in the pipe 8, and the first pressure detection tube 10 is made to face the constricted part 9.
The second pressure detection tube 11 faces the exhaust muffler 6 side, and the first and second pressure detection tubes 1 are placed in the first and second chambers 15 and 16 in the container 13 divided by the diaphragm 14.
The first chamber 15 is provided with a fixed contact piece 17 that faces a movable contact piece 18 provided on the diaphragm 14, and the movable contact piece 18 and the fixed contact piece 17 are connected to a warning device 19.
An air intake device for an engine, characterized in that it is connected to a power supply circuit 21 of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979145827U JPS5936689Y2 (en) | 1979-10-23 | 1979-10-23 | engine air intake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979145827U JPS5936689Y2 (en) | 1979-10-23 | 1979-10-23 | engine air intake device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5663843U JPS5663843U (en) | 1981-05-29 |
| JPS5936689Y2 true JPS5936689Y2 (en) | 1984-10-09 |
Family
ID=29377005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979145827U Expired JPS5936689Y2 (en) | 1979-10-23 | 1979-10-23 | engine air intake device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5936689Y2 (en) |
-
1979
- 1979-10-23 JP JP1979145827U patent/JPS5936689Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5663843U (en) | 1981-05-29 |
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