JPH04103825A - Engine protection device - Google Patents
Engine protection deviceInfo
- Publication number
- JPH04103825A JPH04103825A JP22370690A JP22370690A JPH04103825A JP H04103825 A JPH04103825 A JP H04103825A JP 22370690 A JP22370690 A JP 22370690A JP 22370690 A JP22370690 A JP 22370690A JP H04103825 A JPH04103825 A JP H04103825A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- engine
- stop
- temperature sensor
- pump
- 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
- 239000000498 cooling water Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000000717 retained effect Effects 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000005856 abnormality Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2031/00—Fail safe
- F01P2031/30—Cooling after the engine is stopped
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、エンジンヒートポンプやコジェネレーション
システム等のエンジン排熱利用装置でのエンジン保護装
置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine protection device for an engine exhaust heat utilization device such as an engine heat pump or a cogeneration system.
（従来の技術）
従来、自動無人運転されるエンジンヒートポンプやコジ
ェネレーションシステムなどにおいては、通常運転時の
自動停止の場合エンジンに与える熱影響を抑制するため
に、エンジン停止後冷却水ポンプは遅延タイマで数分間
放熱運転された後、停止するようになっていた。(Prior art) Conventionally, in engine heat pumps, cogeneration systems, etc. that are operated automatically and unmanned, in order to suppress the thermal effect on the engine when automatically stopping during normal operation, the cooling water pump is set to a delay timer after the engine stops. After running for several minutes to dissipate heat, it would stop.
一方、何らかの異常で警報装置が作動した場合や、運転
用コントローラ自身の異常の場合も、安全の為に、構成
する全ての機器を停止する方式をとっていた。On the other hand, in the event that an alarm device is activated due to some abnormality, or if the operating controller itself is abnormal, all components are shut down for safety reasons.
（発明が解決しようとする課題）
この様な従来エンジンでの異常停止では、冷却水ポンプ
も停止するため冷却水の循環が停止し、エンジンの保有
熱が冷却水系統の局部的温度上昇をもたらし、冷却水の
熱膨張で冷却水ポンプや同配管のシール部の水漏れや、
配管割れなどが発生する事があった。(Problem to be solved by the invention) When such an abnormal stop occurs in a conventional engine, the cooling water pump also stops, stopping the circulation of the cooling water, and the heat retained in the engine causes a local temperature rise in the cooling water system. , Thermal expansion of the cooling water may cause water leakage from the cooling water pump or the seals of the piping.
Occasionally cracks in the piping occurred.
本発明は、従来エンジンでの異常停止時に、冷却水系統
のポンプや配管のシール部水漏れ、配管割れなどの発生
を防止することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to prevent water leakage from seals in pumps and piping of a cooling water system, cracking of piping, etc. when a conventional engine stops abnormally.
（課題を解決するための手段）
本発明は、上記目的を達成するために、冷却水ポンプの
停止制御をそれぞれ独立した、運転用コントローラと水
温センサとの二系統で行う。(Means for Solving the Problems) In order to achieve the above object, the present invention performs stop control of the cooling water pump using two independent systems: an operating controller and a water temperature sensor.
例えば第１図に示すように、エンジン１は運転用コント
ローラ６Ｃ制御されて自動運転や自動停止を行うが、冷
却水ポンプ４はポンプ制御器７を介して運転用コントロ
ーラ６からの発停指令６ａと、水温センサ５からの発停
指令５ａの両方で制御される。つまり、どちらか一方で
も停止指令を出さなければ停止しない。For example, as shown in FIG. 1, the engine 1 is controlled by the operating controller 6C to perform automatic operation and automatic stopping, but the cooling water pump 4 receives a start/stop command 6a from the operating controller 6 via the pump controller 7. and the start/stop command 5a from the water temperature sensor 5. In other words, it will not stop unless a stop command is issued from either side.
（作用） 本発明は次のように作用する。(effect) The invention works as follows.
自動運転中何らかの異常で警報装置が作動した時は、冷
却水ポンプ以外の全ての機器を停止させる。冷却水ポン
プはエンジンの放熱が終わるまで運転しその後停止する
。If the alarm device is activated due to some abnormality during automatic operation, all equipment other than the cooling water pump will be stopped. The cooling water pump operates until the heat from the engine has finished dissipating, and then stops.
又、運転用コントローラの異常で停止した時は、別系統
の水温センサにより冷却水ポンプのみを運転しつづけ、
エンジン放熱完了後停止する。In addition, when the operation controller stops due to an abnormality, only the cooling water pump continues to operate using a water temperature sensor in a separate system.
It will stop after the engine heat dissipation is completed.
（発明の効果）
本発明は、上記のように構成され作用することから、エ
ンジンの異常停止時でも冷却水ポンプは一定時間運転さ
れ続けることになるから、冷却水系統が高温状態のまま
放置されることが無くなり、エンジンの保有熱が冷却水
系統の局部的温度上昇をもたらして、冷却水の熱膨張で
冷却水ポンプや同配管などのシール部の水漏れや、配管
割れなどを発生させるのを防止できる。(Effects of the Invention) Since the present invention is configured and operates as described above, the cooling water pump continues to operate for a certain period of time even when the engine stops abnormally, so the cooling water system is not left in a high temperature state. The retained heat of the engine causes a local temperature rise in the cooling water system, and the thermal expansion of the cooling water can cause water leakage or cracking of the cooling water pump or piping. can be prevented.
（実施例）
以下、エンジンヒートポンプにおける本発明の実施例を
、第１図の冷却水系統及び冷却水ポンプ制御系統の説明
図、第２図の冷却水ポンプ制御系統のフローチャートで
説明する。(Example) Hereinafter, an example of the present invention in an engine heat pump will be described with reference to an explanatory diagram of a cooling water system and a cooling water pump control system in FIG. 1, and a flowchart of a cooling water pump control system in FIG.
第１図において、１はエンジン、２は放熱器、３は冷却
水路、４は冷却水ポンプ、５はエンジン１のウォータジ
ャケット部に配置した水温センサ、５ａは水温センサ５
の発停指令線、６は運転用コントローラ、６ａは運転用
コントローラ６の発停指令線、７はポンプ制御器、８は
送風ファンである。In FIG. 1, 1 is an engine, 2 is a radiator, 3 is a cooling channel, 4 is a cooling water pump, 5 is a water temperature sensor disposed in the water jacket of the engine 1, and 5a is a water temperature sensor 5.
6 is an operation controller, 6a is an on/off command line for the operation controller 6, 7 is a pump controller, and 8 is a blower fan.
エンジン１が運転中冷却水は冷却水ポンプ４で圧送され
て、エンジン１のウォータジャケットやマフラーなどの
発熱部を取り囲む状態で配置した排ガス熱交換器の冷却
水路３を回り、それらを冷却する代わりに熱を吸収した
後放熱器２でその熱を放出する。送風ファン８は放熱器
２に送風して放熱器２から放出された熱を奪い、温風と
してから必要箇所へ送風する。While the engine 1 is in operation, the cooling water is pumped by the cooling water pump 4, passes through the cooling water channel 3 of the exhaust gas heat exchanger that surrounds heat generating parts such as the water jacket and muffler of the engine 1, and cools them instead. After absorbing heat, the heat radiator 2 releases the heat. The blower fan 8 blows air to the radiator 2, removes the heat released from the radiator 2, turns it into warm air, and then blows the air to a necessary location.
運転用コントローラ６はエンジン１の運転状況を制御す
るとともに、通常の自動停止の場合はエンジン１を停止
した後も、発停指令線６ａ及びポンプ制御器７を介して
遅延タイマで冷却水ポンプ４を数分間運転してから停止
させる。もし、何らかの異常により警報装置が作動した
場合は、送風ファン８及び冷却水ポンプ４以外の全ての
機器を停止させ、同様に遅延タイマで冷却水ポンプ４の
み数分間運転してから停止させる。The operation controller 6 controls the operation status of the engine 1, and in the case of normal automatic stop, even after the engine 1 is stopped, the operation controller 6 controls the cooling water pump 4 with a delay timer via the start/stop command line 6a and the pump controller 7. Run for a few minutes and then stop. If the alarm device is activated due to some abnormality, all devices other than the blower fan 8 and the cooling water pump 4 are stopped, and similarly, only the cooling water pump 4 is operated for several minutes using a delay timer and then stopped.
又、運転用コントローラ６自身の異常で停止した時は、
エンジン１に設置しである水温センサ５により発停指令
線５ａ及びポンプ制御器７を介して冷却水ポンプ４のみ
運転し、定められた温度になるまでエンジン１を冷却し
て、放熱完了後停止する。In addition, when the operation controller 6 itself stops due to an abnormality,
Only the cooling water pump 4 is operated by the water temperature sensor 5 installed in the engine 1 via the start/stop command line 5a and the pump controller 7, cools the engine 1 until it reaches a predetermined temperature, and stops after heat radiation is completed. do.
以上の動作を第２図のフローチャートで説明すれば、運
転用コントローラ６の内部ではエンジン１の運転状態１
０の時警報感知回路１１が常に警報装置が作動したかど
うかを監視しており、作動していなければ次に停止判断
回路１２が停止指令があったかどうかを判断して、無け
れば運転を続けるようにループ１３を回している。If the above operation is explained using the flowchart shown in FIG.
When the alarm is 0, the alarm detection circuit 11 constantly monitors whether the alarm device is activated or not, and if it is not activated, the stop judgment circuit 12 then judges whether there is a stop command, and if there is not, the operation is continued. is running loop 13.
この状態の時、何らかの異常で警報装置が作動すれば急
停止動作１４で全ての機器を急停止させ、又は停止指令
がでれば自動停止動作１５で定められた手順で自動停止
させるが、何れの場合でも、遅延タイマ１６が作動して
一定の遅延時間の後でなければ発停指令線６ａ及びポン
プ制御器７を介してポンプ停止動作１７を冷却水ポンプ
４に与える事はない。In this state, if the alarm device is activated due to some abnormality, all the equipment will be suddenly stopped with the sudden stop action 14, or if a stop command is issued, they will be automatically stopped according to the prescribed procedure with the automatic stop action 15. Even in this case, the pump stop action 17 is not given to the cooling water pump 4 via the start/stop command line 6a and the pump controller 7 unless the delay timer 16 is activated and a certain delay time has elapsed.
又、もし運転用コントローラ６自身の異常で遅延タイマ
１６が作動しなかった時には発停指令線６ａからの指令
は切れるが、水温センサ５が一定の温度になるまで発停
指令線５ａ及びポンプ制御器７を介してポンプ停止動作
１７を冷却水ポンプ４に与える事はないから、冷却水ポ
ンプ４はエンジン１が一定の温度になるまで運転し、放
熱完了後停止する。If the delay timer 16 does not operate due to an abnormality in the operation controller 6 itself, the command from the start/stop command line 6a will be cut off, but the command from the start/stop command line 5a and pump control will continue until the water temperature sensor 5 reaches a certain temperature. Since the pump stop action 17 is not applied to the cooling water pump 4 via the pump 7, the cooling water pump 4 operates until the engine 1 reaches a certain temperature and stops after heat radiation is completed.
運転用コントローラ６の発停指令線６ａと水温センサ５
の発停指令線５ａとは完全に別系統となっているから、
エンジン１の異常停止時でも運転用コントローラ６自身
の異常時でも、冷却水ポンプ４はポンプ制御器７を介し
てどちらか一方の停止指令が来るまで停止する事はなく
、エンジン１の保有熱が冷却水系統の局部的温度上昇を
もたらして、冷却水の熱膨張で冷却水ポンプや同配管な
どのシール部の水漏れや、配管割れなどを発生させるの
を防止できる。Start/stop command line 6a of operation controller 6 and water temperature sensor 5
Because it is a completely separate system from the start/stop command line 5a,
Even when the engine 1 stops abnormally or when the operation controller 6 itself has an abnormality, the cooling water pump 4 will not stop until a stop command is received from either one via the pump controller 7, and the retained heat of the engine 1 will be reduced. By causing a local temperature rise in the cooling water system, it is possible to prevent water from leaking from the seals of the cooling water pump and its piping, or from causing cracks in the piping due to thermal expansion of the cooling water.
第１図及び第２図は本発明の実施例を示し、第１図は冷
却水系統及び冷却水ポンプ制御系統の説明図、第２図は
冷却水ポンプ制御系統のフローチャートである。
１・・・エンジン、２・・・放熱器、３・・・冷却水路
、４・・・冷却水ポンプ、５・・・水温センサ、６・・
・運転コントローラ、７・・・ポンプ制御器、８・・・
送風ファン。1 and 2 show an embodiment of the present invention, FIG. 1 is an explanatory diagram of a cooling water system and a cooling water pump control system, and FIG. 2 is a flowchart of the cooling water pump control system. 1...Engine, 2...Radiator, 3...Cooling water channel, 4...Cooling water pump, 5...Water temperature sensor, 6...
・Operation controller, 7...Pump controller, 8...
Blower fan.
Claims (1)
成し、この冷却水路３に冷却水ポンプ４を配置して冷却
水をエンジン１と放熱器２との間で循環させるようにし
、冷却水ポンプ４の作動を運転用コントローラ６の指令
で行うように構成したエンジン排熱利用装置において、 エンジン冷却水温を検出する水温センサ５ を冷却水循環系に配置し、この水温センサ５での冷却水
温情報に基づき冷却水ポンプ４を作動制御可能に構成し
、冷却水ポンプ４を運転用コントローラ６からの指令と
水温センサ５からの指令とで独立して停止制御させるよ
うに構成した、エンジンの保護装置。[Claims] 1. The engine 1 and the radiator 2 are formed into a closed circuit by a cooling water channel 3, and a cooling water pump 4 is disposed in the cooling water channel 3 to supply cooling water between the engine 1 and the radiator 2. In the engine exhaust heat utilization system configured such that the cooling water pump 4 is operated by a command from the operation controller 6, a water temperature sensor 5 for detecting the engine cooling water temperature is disposed in the cooling water circulation system. The cooling water pump 4 is configured to be able to be operated and controlled based on the cooling water temperature information from the water temperature sensor 5, and the cooling water pump 4 is controlled to stop independently based on commands from the operation controller 6 and commands from the water temperature sensor 5. An engine protection device configured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22370690A JPH04103825A (en) | 1990-08-23 | 1990-08-23 | Engine protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22370690A JPH04103825A (en) | 1990-08-23 | 1990-08-23 | Engine protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04103825A true JPH04103825A (en) | 1992-04-06 |
Family
ID=16802388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22370690A Pending JPH04103825A (en) | 1990-08-23 | 1990-08-23 | Engine protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04103825A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10378544B2 (en) | 2015-04-09 | 2019-08-13 | Brian Rosser Rejniak | Apparatus, systems and methods for protecting pumps |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6189918A (en) * | 1984-10-09 | 1986-05-08 | Nissan Motor Co Ltd | Engine cooling device for vehicle |
| JPS6249618B2 (en) * | 1977-09-16 | 1987-10-20 | Canon Kk |
-
1990
- 1990-08-23 JP JP22370690A patent/JPH04103825A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6249618B2 (en) * | 1977-09-16 | 1987-10-20 | Canon Kk | |
| JPS6189918A (en) * | 1984-10-09 | 1986-05-08 | Nissan Motor Co Ltd | Engine cooling device for vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10378544B2 (en) | 2015-04-09 | 2019-08-13 | Brian Rosser Rejniak | Apparatus, systems and methods for protecting pumps |
| US10989200B2 (en) | 2015-04-09 | 2021-04-27 | Brian Rosser Rejniak | Apparatus, systems and methods for protecting pumps |
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