JP2542730Y2 - Emergency stop device for internal combustion engine - Google Patents
Emergency stop device for internal combustion engineInfo
- Publication number
- JP2542730Y2 JP2542730Y2 JP1988046229U JP4622988U JP2542730Y2 JP 2542730 Y2 JP2542730 Y2 JP 2542730Y2 JP 1988046229 U JP1988046229 U JP 1988046229U JP 4622988 U JP4622988 U JP 4622988U JP 2542730 Y2 JP2542730 Y2 JP 2542730Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- pump
- suction
- pipe
- injection device
- 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 - Lifetime
Links
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、内燃機関（デイーゼルエンジン）の緊急停
止装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an emergency stop device for an internal combustion engine (diesel engine).
（従来の技術） 内燃機関の燃料噴射装置の従来例を第３図によって説
明すると、燃料噴射装置（ｅ）に１次燃料フイルタ
（ａ）、燃料フイードポンプ（ｃ）および２次燃料フイ
ルタ（ｄ）付き燃料供給ライン（l0,1,2,3）を連設し、
燃料噴射装置（ｅ）に調圧弁（ｆ）付き管路（l4,5）を
連結して、燃料フイードポンプ（ｃ）により燃料供給ラ
インを経て燃料を圧送して燃料噴射装置（ｅ）に供給
し、内燃機関（図示省略）内に燃料を噴射（ｇ）すると
ともに、従来、前記内燃機関の燃料カツトによる緊急停
止は、燃料噴射装置（ｅ）の燃料流量コントロール部を
燃料減方向に急速に作動させるか、燃料供給ライン（燃
料フイードポンプ（ｃ）の吸入側）に設けた燃料カツト
弁（ｂ）によって燃料吸入をカツトする緊急停止装置に
よって行われている。(Prior Art) A conventional example of a fuel injection device for an internal combustion engine will be described with reference to FIG. 3. A fuel injection device (e) includes a primary fuel filter (a), a fuel feed pump (c), and a secondary fuel filter (d). Connected fuel supply lines (l 0 , 1 , 2 , 3 )
A pressure regulating valve (f) with line fuel injection system (e) (l 4, 5) to connect the supply to, the fuel Fuidoponpu (c) through a fuel supply line to pump the fuel injection device (e) In addition, the fuel is injected (g) into the internal combustion engine (not shown), and the conventional emergency stop by the fuel cut of the internal combustion engine is performed by rapidly moving the fuel flow control unit of the fuel injection device (e) in the fuel decreasing direction. It is operated by an emergency stop device which cuts off fuel suction by a fuel cut valve (b) provided on a fuel supply line (a suction side of a fuel feed pump (c)).
（考案が解決しようとする課題） 従来の前記緊急停止装置において、燃料噴射装置の燃
料流量コントロール部を操作して燃料をカツトする場合
は、燃料送出プランジヤが焼付いた時などにコントロー
ル部が作動せず内燃機関を緊急停止できなくなり、緊急
停止の作動信頼性に問題がある。(Problem to be Solved by the Invention) In the conventional emergency stop device, when the fuel is cut by operating the fuel flow control unit of the fuel injection device, the control unit is activated when the fuel delivery plunger is seized. Therefore, the internal combustion engine cannot be emergency stopped, and there is a problem in the operation reliability of the emergency stop.
燃料供給ラインに設けた燃料カツト弁によって燃料カ
ツトする場合は、燃料供給ラインおよび燃料噴射装置内
の残留燃料によつて内燃機関を急速に停止できないなど
の問題点がある。When the fuel is cut by the fuel cut valve provided in the fuel supply line, there is a problem that the internal combustion engine cannot be stopped quickly due to residual fuel in the fuel supply line and the fuel injection device.
本考案は、前記課題に対処するために開発されたもの
であつて、その目的とする処は、燃料の供給カツトと、
燃料フイードポンプによる燃料残留液の積極排出によ
り、緊急停止性能、作動信頼性を向上した内燃機関の緊
急停止装置を提供するにある。The present invention has been developed to address the above-mentioned problems, and its purpose is to provide a fuel supply cut,
It is an object of the present invention to provide an emergency stop device for an internal combustion engine in which emergency stop performance and operation reliability are improved by positively discharging fuel residual liquid by a fuel feed pump.
（課題を解決するための手段） 本考案は、燃料フイードポンプの吐出側に燃料噴射装
置の吸入側管路と排気用管路とに切換え、且つ排気用管
路に切換時に、前記燃料噴射装置の吸入側管路を空気吸
入管に切換えるポンプ吐出側切換弁を設け、燃料フイー
ドポンプの吸入側に燃料吸入管と燃料噴射装置の残留液
排出用管路に切換えるポンプ吸入側切換弁を設けた構成
に特徴を有し、前記両切換弁により燃料の供給カツトと
ともに燃料残留液の積極排出を可能といている。(Means for Solving the Problems) The present invention switches between the suction side pipe and the exhaust pipe of the fuel injection device to the discharge side of the fuel feed pump, and when the fuel injection pump is switched to the exhaust pipe, A pump discharge side switching valve that switches the suction side pipe to the air suction pipe is provided, and a pump suction side switching valve that switches between the fuel suction pipe and the residual liquid discharge pipe of the fuel injection device is provided on the suction side of the fuel feed pump. It has the characteristic that the two switching valves enable the fuel supply cut and the fuel residual liquid to be actively discharged.
（作用） 通常運転時は、燃料フイードポンプで燃料が圧送され
て燃料噴射装置により噴射され、緊急停止時は、ポンプ
吐出側切換弁とポンプ吸入側切換弁で燃料フイードポン
プの吐出側と吸入側が排出用管路と燃料噴射装置の残留
液排出管路に切換えられ、燃料の吸入、燃料噴射装置へ
の燃料供給がカツトされるとともに、燃料フイードポン
プによつて燃料噴射装置内の燃料残留液が積極的に吸い
出し排出され、燃料噴射装置の燃料噴射が直ちに停止し
内燃機関が急速に停止される。(Operation) During normal operation, fuel is fed by the fuel feed pump and injected by the fuel injection device. During an emergency stop, the discharge side and the suction side of the fuel feed pump are exhausted by the pump discharge side switching valve and the pump suction side switching valve. The line is switched to the line and the residual liquid discharge line of the fuel injection device, and the intake of fuel and the supply of fuel to the fuel injection device are cut, and the fuel residual liquid in the fuel injection device is positively activated by the fuel feed pump. It is sucked and discharged, and the fuel injection of the fuel injection device is immediately stopped, and the internal combustion engine is rapidly stopped.
（実施例） 第１図および第２図に本考案の一実施例を示し、図中
（１）はタンクに設けた１次燃料フイルタ、（３）は燃
料フイードポンプ、（４）は２次燃料フイルタ、（６）
は燃料噴射装置、（７）は調圧弁であつて、燃料供給ラ
イン（10,…14）は、燃料吸入管（10）、燃料噴射装置
（６）の吸入側管路（14）等からなり、１次、２次燃料
フイルタ（１）（４）、燃料フイードポンプ（３）、ポ
ンプ吸入側切換弁（２）、ポンプ吐出側切換弁（５）が
介装され、燃料フイードポンプ（３）付きの燃料供給ラ
イン（10,…14）に連設された燃料噴射装置（６）を有
する内燃機関において、燃料フイードポンプ（３）の吐
出側に燃料噴射装置（６）の吸入側管路（14）と排出用
管路（22）に切換えるポンプ吐出側切換弁（５）を設け
るとともに、燃料フイードポンプ（３）の吸入側に燃料
吸入管（10）と燃料噴射装置（６）の残留液排出用管路
（23）に切換えるポンプ吸入側切換弁（２）を設けた内
燃機関の緊急停止装置になっている。(Embodiment) FIGS. 1 and 2 show one embodiment of the present invention, in which (1) is a primary fuel filter provided in a tank, (3) is a fuel feed pump, and (4) is a secondary fuel. Filter, (6)
Denotes a fuel injection device, (7) denotes a pressure regulating valve, and the fuel supply line (10,...) Comprises a fuel suction pipe (10), a suction side pipe line (14) of the fuel injection device (6), and the like. A primary and secondary fuel filters (1) and (4), a fuel feed pump (3), a pump suction side switching valve (2), and a pump discharge side switching valve (5) are interposed, and a fuel feed pump (3) is provided. In an internal combustion engine having a fuel injection device (6) connected to a fuel supply line (10,..., 14), a suction side pipe (14) of the fuel injection device (6) is connected to a discharge side of a fuel feed pump (3). A pump discharge side switching valve (5) for switching to a discharge pipe (22) is provided, and a fuel suction pipe (10) and a residual liquid discharge pipe of a fuel injection device (6) are provided on a suction side of a fuel feed pump (3). An emergency stop device for an internal combustion engine equipped with a pump suction side switching valve (2) that switches to (23) ing.
前記ポンプ吸入側切換弁（２）は、燃料フイードポン
プ（３）の吸入側の管路（11）と燃料吸入管（10）間に
介装され、燃料噴射装置（６）に連設された調圧弁
（７）付き管路（15）（16）に図示のように連結された
残留液排出用管路（23）に切換えられる配置になってお
り、前記ポンプ吐出側切換弁（５）は、燃料フイードポ
ンプ（３）の吐出側の管路（13）と燃料噴射装置（６）
の吸入側管路（14）間に配設され、排気用管路（22）に
切換えられるとともに、空気吸入管（21）を排気用管路
（22）と吸入側管路（14）に切換える構造になってい
る。The pump suction side switching valve (2) is interposed between the pipe line (11) on the suction side of the fuel feed pump (3) and the fuel suction pipe (10), and is connected to the fuel injection device (6). It is arranged to be switched to a residual liquid discharge line (23) connected as shown to the lines (15) and (16) with the pressure valve (7), and the pump discharge side switching valve (5) is Pipe line (13) on the discharge side of fuel feed pump (3) and fuel injection device (6)
Is disposed between the suction-side pipes (14) of the pump and is switched to an exhaust pipe (22), and the air suction pipe (21) is switched to an exhaust pipe (22) and a suction-side pipe (14). It has a structure.
通常運転時には、ポンプ吸入側切換弁（２）およびポ
ンプ吐出側切換弁（５）は第１図に示すように操作さ
れ、燃料フイードポンプ（３）によってタンク内の燃料
が１次燃料フイルタ（１）で過されたのち燃料供給ラ
イン（10,…14）によりポンプ吸入側切換弁（２）→燃
料フイードポンプ（３）、２次燃料フイルタ（４）→ポ
ンプ吐出側切換弁（５）を経て圧送されて燃料噴射装置
（６）に供給され、燃料噴射装置（６）によって内燃機
関内（図示省略）に噴射（26）され、調圧弁（７）によ
り調圧されている。During normal operation, the pump suction side switching valve (2) and the pump discharge side switching valve (5) are operated as shown in FIG. 1, and the fuel in the tank is changed by the fuel feed pump (3) to the primary fuel filter (1). , And the fuel is supplied through a fuel supply line (10,..., 14) through a pump suction side switching valve (2) → a fuel feed pump (3), a secondary fuel filter (4) → a pump discharge side switching valve (5). The fuel is supplied to the fuel injection device (6), is injected into the internal combustion engine (not shown) by the fuel injection device (6) (26), and is regulated by the pressure regulating valve (7).
内燃機関の緊急停止時は、ポンプ吸入側切換弁（２）
とポンプ吐出側切換弁（５）が同時に第２図に示すよう
に切換えられ、ポンプ吸入側切換弁（２）によってタン
ク側の燃料吸入管（10）が遮断され燃料の吸入が停止さ
れて、ポンプ吸入側切換弁（５）によって燃料噴射装置
（６）の吸入側管路（14）が遮断され燃料の供給がカツ
トされ、燃料噴射装置（６）の燃料噴射（26）が停止さ
れるとともに、燃料フイードポンプ（３）によって燃料
噴射装置（６）内、吸入側管路（14）内の燃料残留液が
積極的に管路（15）、残留液排出用管路（23）を経て、
さらにポンプ吸入側切換弁（２）→管路（11）→燃料フ
イードポンプ（３）→管路（12）（13）→ポンプ吐出側
切換弁（５）→排出用管路（22）の経路で排出されて、
燃料噴射装置（６）は、燃料カツトとともに残留液の積
極的な吸出し、排出によって直ちに燃料噴射が停止され
て、内燃機関が緊急停止される。During an emergency stop of the internal combustion engine, the pump suction side switching valve (2)
2, the pump discharge side switching valve (5) is simultaneously switched as shown in FIG. 2, the tank suction side switching valve (2) shuts off the fuel suction pipe (10) on the tank side, and the fuel suction is stopped. The pump suction side switching valve (5) shuts off the suction side pipe (14) of the fuel injection device (6), cuts off the supply of fuel, and stops the fuel injection (26) of the fuel injection device (6). The fuel feed pump (3) causes the fuel residual liquid in the fuel injection device (6) and the suction-side conduit (14) to positively pass through the conduit (15) and the residual liquid discharge conduit (23).
In addition, the pump suction side switching valve (2) → line (11) → fuel feed pump (3) → line (12) (13) → pump discharge side switching valve (5) → discharge line (22). Discharged
The fuel injection device (6) immediately stops the fuel injection by the active suction and discharge of the residual liquid together with the fuel cut, and the internal combustion engine is stopped immediately.
また、燃料噴射装置（６）への燃料カツトと同時に、
その吸入側管路（14）に空気吸入管（21）が連結されて
空気が流入されるため、残留液排出が円滑に遂行され
る。At the same time as the fuel cut to the fuel injection device (6),
Since the air suction pipe (21) is connected to the suction side pipe (14) and air flows in, the residual liquid is smoothly discharged.
（考案の効果） このように本考案によるときは燃料フイードポンプの
吐出側に燃料噴射装置の吸入側管路と排気用管路とに切
換え、且つ排気用管路に切換時に、燃料噴射装置の吸入
側管路を空気吸入管に切換えるポンプ吐出側切換弁を設
けるとともに、燃料フイードポンプの吸入側に燃料吸入
管と燃料噴射装置の残留液排出用管路とに切換えるポン
プ吸入側切換弁とを設けたものであるから、通常運転時
は、ポンプ吸入側切換弁によって燃料フイードポンプの
吸入側が燃料吸入管に連結され、ポンプ吸入側切換弁に
よって燃料フイードポンプの吐出側が燃料噴射装置の吸
入側管路に連結されて、通常の燃料噴射となり、緊急停
止時は、ポンプ吐出側切換弁によって燃料噴出装置の吸
入側管路が空気吸入管に連結されて積極的に外部より空
気を取入れて急速な吸戻しを可能にし、ポンプ吸入側切
換弁によって燃料吸入管が遮断されて燃料吸入がカット
されて、残留液排出用管路が燃料フイードポンプの吸入
側に連結されるとともに、ポンプ吐出側切換弁によって
燃料フイードポンプの吐出側が排出用管路に連結され
て、燃料供給のカットとともに燃料フイードポンプによ
って、燃料噴射装置、吸入側管路内の燃料残留液が積極
的に吸出し、排出され、而も燃料供給ラインはポンプ吐
出側切換弁と、ポンプ吸入側切換弁との２つの切換弁に
より制御されるため、例えば一方の切換弁が作動不良と
なっても他方の切換弁が作動して緊急停止性能、作動信
頼性が著しく向上される等の効果を有する。(Effects of the Invention) As described above, according to the present invention, when the fuel supply pump is switched to the suction side pipe and the exhaust pipe of the fuel injection device on the discharge side, and when the fuel supply pump is switched to the exhaust pipe, the suction of the fuel injection device is performed. A pump discharge side switching valve for switching the side pipe to the air suction pipe is provided, and a pump suction side switching valve for switching between the fuel suction pipe and the residual liquid discharge pipe of the fuel injection device is provided on the suction side of the fuel feed pump. During normal operation, the suction side of the fuel feed pump is connected to the fuel suction pipe by the pump suction side switching valve, and the discharge side of the fuel feed pump is connected to the suction side pipe of the fuel injection device by the pump suction side switching valve. In the event of an emergency stop, the pump-side switching valve connects the suction-side line of the fuel injection device to the air suction pipe and actively pumps air from outside. The fuel intake pipe is cut off by the pump intake side switching valve, the fuel intake is cut off, the residual liquid discharge pipe is connected to the intake side of the fuel feed pump, and the pump discharge The discharge side of the fuel feed pump is connected to the discharge line by the side switching valve, and the fuel feed pump actively sucks and discharges the residual fuel in the fuel injection device and the suction side line by cutting off the fuel supply. Since the fuel supply line is controlled by two switching valves, ie, a pump discharge side switching valve and a pump suction side switching valve, for example, even if one of the switching valves malfunctions, the other switching valve operates and the emergency This has the effect of significantly improving stopping performance and operation reliability.
第１図は本考案の一実施例を示す機構図、第２図は作用
説明の機構図、第３図は従来例の機構図である。 2:ポンプ吸入側切換弁 3:燃料フイードポンプ 5:ポンプ吐出側切換弁 6:燃料噴射装置 10,11,12,13,14:燃料供給ライン 10:燃料吸入管、14:吸入側管路 22:排出用管路、23:残留液排出用管路FIG. 1 is a mechanical diagram showing an embodiment of the present invention, FIG. 2 is a mechanical diagram for explaining the operation, and FIG. 3 is a mechanical diagram of a conventional example. 2: Pump suction side switching valve 3: Fuel feed pump 5: Pump discharge side switching valve 6: Fuel injection device 10, 11, 12, 13, 14: Fuel supply line 10: Fuel suction pipe, 14: Suction side line 22: Drain line, 23: Residual liquid discharge line
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−147839（ＪＰ，Ａ) 特開 昭64−53025（ＪＰ，Ａ) 特開 昭57−340（ＪＰ，Ａ) 実開 昭57−95439（ＪＰ，Ｕ) 実開 昭63−168239（ＪＰ，Ｕ) 実開 昭58−132139（ＪＰ，Ｕ) 実開 昭57−59940（ＪＰ，Ｕ) 実公 昭63−15546（ＪＰ，Ｙ２) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-147839 (JP, A) JP-A-64-53025 (JP, A) JP-A-57-340 (JP, A) 95439 (JP, U) Japanese Utility Model 63-168239 (JP, U) Japanese Utility Model 58-132139 (JP, U) Japanese Utility Model 57-59940 (JP, U) Japanese Utility Model 63-15546 (JP, Y2)
Claims (1)
連設された燃料噴射装置を有する内燃機関において、前
記燃料フイードポンプの吐出側に、前記燃料噴射装置の
吸入側管路と、排気用管路とに切換え且つ排気用管路に
切換時に前記燃料噴射装置の吸入側管路を空気吸入管に
切換えるポンプ吐出側切換弁を設けるとともに、前記燃
料フイードポンプの吸入側に、燃料吸入管と前記燃料噴
射装置の残留液排出用管路とに切換えるポンプ吸入側切
換弁を設けたことを特徴とする内燃機関の緊急停止装
置。In an internal combustion engine having a fuel injection device connected to a fuel supply line with a fuel feed pump, a fuel supply pump has a discharge side, a suction side pipe of the fuel injection apparatus, and an exhaust pipe. A pump discharge side switching valve for switching the suction side pipe of the fuel injection device to the air suction pipe at the time of switching and switching to the exhaust pipe is provided, and a fuel suction pipe and the fuel injection device are provided on the suction side of the fuel feed pump. An emergency stop device for an internal combustion engine, comprising a pump suction-side switching valve for switching to a residual liquid discharge line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988046229U JP2542730Y2 (en) | 1988-04-07 | 1988-04-07 | Emergency stop device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988046229U JP2542730Y2 (en) | 1988-04-07 | 1988-04-07 | Emergency stop device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01149537U JPH01149537U (en) | 1989-10-17 |
| JP2542730Y2 true JP2542730Y2 (en) | 1997-07-30 |
Family
ID=31272504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988046229U Expired - Lifetime JP2542730Y2 (en) | 1988-04-07 | 1988-04-07 | Emergency stop device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2542730Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026210Y2 (en) * | 1980-12-02 | 1985-08-07 | 株式会社ボッシュオートモーティブ システム | Fuel cut mechanism of fuel supply device for fuel injection pump |
-
1988
- 1988-04-07 JP JP1988046229U patent/JP2542730Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01149537U (en) | 1989-10-17 |
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