JPH06174580A - Leakage detector for combustion gas of internal combustion engine - Google Patents

Leakage detector for combustion gas of internal combustion engine

Info

Publication number
JPH06174580A
JPH06174580A JP4351130A JP35113092A JPH06174580A JP H06174580 A JPH06174580 A JP H06174580A JP 4351130 A JP4351130 A JP 4351130A JP 35113092 A JP35113092 A JP 35113092A JP H06174580 A JPH06174580 A JP H06174580A
Authority
JP
Japan
Prior art keywords
cooling water
pressure
temperature
combustion chamber
combustion
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
Application number
JP4351130A
Other languages
Japanese (ja)
Other versions
JP3188003B2 (en
Inventor
Hiroshi Saito
宏 斉藤
Takeo Takaishi
武夫 高石
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP35113092A priority Critical patent/JP3188003B2/en
Publication of JPH06174580A publication Critical patent/JPH06174580A/en
Application granted granted Critical
Publication of JP3188003B2 publication Critical patent/JP3188003B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Testing Of Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To detect the leakage of a combustion gas earlier by installing temperature sensors and pressure sensors mounted at every cylinder, a device amplifying and converting the signals of these sensors, a device displaying the amplified converted values and an alarm device at a time when these values are higher than or lower than a set value in a cooling water system. CONSTITUTION:A feed pump 5 forwards cooling water in a cooling water tank 4 into the water chambers of each engine combustion chamber 2 through a cooling water pipe 3, and cooling water is returned to the tank 4 after cooling. A supply-like pressure sensor V, a supply-line temperature sensor 8, pressure sensors 9, 10 for No.1 and (n) combustion chambers, and temperature sensors 11, 12 for the No.1 and (n) combustion chambers detect the pressure and temperature of cooling water and the pressure and temperature of the outlets of cooling water in the periphery of the combustion chambers 2 of each number, transmit signal to a sensor input device, and emit display, alarm and engine stop signals. There is constant temperature difference in the outlet of the pump 5 and the outlets of the combustion chamber 2 at the temperature of cooling water, but the temperatures of the outlet of the combustion chambers 2 are elevated when a gas leaks into cooling water. The pressure of cooling water is approximately equalized in the outlet of the pump 5 and the outlets of the combustion chamber 2, but the pressure of the outlets of the combustion chambers in increased when cooling water leaks.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は内燃機関の燃焼ガス漏洩
検知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion gas leak detection device for an internal combustion engine.

【０００２】[0002]

【従来の技術】内燃機関の燃焼ガス漏洩検知は通常行わ
れていない。そのため時として重大事故を見逃す結果と
なっている。燃焼ガスの漏洩個所が機関外部にある場合
はガスシール部よりの漏洩ガスが目視で判断できるため
検知が可能である。しかしかくれた燃焼室内部から燃焼
ガス漏洩がある場合判別は困難である。2. Description of the Related Art Combustion gas leakage detection of an internal combustion engine is not usually performed. As a result, they sometimes miss serious accidents. If the location where the combustion gas leaks is outside the engine, it is possible to detect it because the leak gas from the gas seal can be visually determined. However, it is difficult to discriminate when there is a combustion gas leak from the hidden combustion chamber.

【０００３】[0003]

【発明が解決しようとする課題】内燃機関の燃焼ガス漏
洩検知は従来特別なセンサを使用した異常診断的装置は
ない。このため例えば機関稼働中に燃焼ガスが燃焼室ま
わりの冷却水に漏洩混入し、この現象を早期に発見でき
ずに見逃したため、二次的大事故につながる恐れがあ
る。又燃焼ガスが高温高圧のため漏洩した場合これに注
目した検知技術がのぞまれていた。本発明の目的は前記
課題の解決策として燃焼ガスの漏洩を早期に検知する装
置を提供するにある。In the detection of combustion gas leakage in an internal combustion engine, there is no conventional abnormality diagnostic device using a special sensor. Therefore, for example, the combustion gas leaks and mixes into the cooling water around the combustion chamber during operation of the engine, and this phenomenon could not be detected early and was overlooked, which could lead to a secondary major accident. In addition, when combustion gas leaks due to high temperature and high pressure, a detection technique that pays attention to this has been desired. An object of the present invention is to provide a device for early detection of combustion gas leakage as a solution to the above problems.

【０００４】[0004]

【課題を解決するための手段】本発明の燃焼ガスの漏洩
検出装置は、各燃焼室を冷却する冷却水系に各シリンダ
毎に設置された温センサ及び圧力センサと、前記温度セ
ンサ及び圧力センサの信号を増巾変換する機能を有する
装置と、前記冷却水の温度及び圧力を表示する機能を有
する装置と、温度及び圧力が設定レベル以上又は以下で
は警報を発生する機能を有する装置とを有してなること
を特徴とする。SUMMARY OF THE INVENTION A combustion gas leakage detection device according to the present invention comprises a temperature sensor and a pressure sensor installed for each cylinder in a cooling water system for cooling each combustion chamber, and the temperature sensor and the pressure sensor. It has a device having a function of increasing and converting a signal, a device having a function of displaying the temperature and pressure of the cooling water, and a device having a function of issuing an alarm when the temperature and pressure are above or below a set level. It is characterized by

【０００５】[0005]

【作用】機関運転中に燃焼室内から燃焼室まわりの破損
事故等により燃焼ガスもれが発生した場合を考える。燃
焼室の周囲は水路を持つ冷却室で囲まれている。この燃
焼室から冷却室までの間の部位に何らかの異常（故障）
により漏洩があったとき燃焼室内のガスが冷却水中に入
り込み、燃焼室内の高温高圧ガスが冷却水に入り込むこ
とにより水室内の圧力及び温度を変化させる。これを各
シリンダの冷却水系ラインに設置された圧力検知センサ
及び温度検知センサが検知する。各シリンダの冷却水出
口に置かれた圧力検知センサ及び温度検知センサからの
信号を増巾変換する。前記冷却水の圧力及び温度を機関
稼働時常時監視表示する。これにより異状を早期に検出
できる。前記温度及び圧力が設定レベル以上又は以下で
は警報を発生する。[Operation] Consider a case where combustion gas leaks from the combustion chamber due to a damage accident around the combustion chamber during engine operation. The periphery of the combustion chamber is surrounded by a cooling chamber having a water channel. Any abnormality (fault) in the part between the combustion chamber and the cooling chamber
When there is a leak, the gas in the combustion chamber enters the cooling water, and the high-temperature high-pressure gas in the combustion chamber enters the cooling water, thereby changing the pressure and temperature in the water chamber. This is detected by a pressure detection sensor and a temperature detection sensor installed in the cooling water system line of each cylinder. The signals from the pressure detection sensor and the temperature detection sensor placed at the cooling water outlet of each cylinder are amplified and converted. The pressure and temperature of the cooling water are constantly monitored and displayed during engine operation. This allows the abnormality to be detected early. When the temperature and pressure are above or below the set level, an alarm is issued.

【０００６】[0006]

【実施例】実施例を図１〜３によって説明する。図１は
実施例の検知センサ設置場所の図、図２は実施例の計測
系ブロック線図、図３はＬＥＤによる監視表示の図であ
る。機関の各シリンダの冷却水出口に燃焼ガスもれを検
知する圧力センサ及び温度センサを設置する。前記検知
センサからの信号を常時監視するために検知信号をシリ
ンダ毎にＬＥＤ表示する。前記監視する圧力又は温度の
値にしきい値を設け異状の場合には警報レベル値により
異常が検知できる機能をもつものとする。図において、
１は機関本体、２は機関燃焼室、３は冷却水入口管、４
は冷却水タンク、５は供給ポンプで内燃機関の公知の要
素である。７は供給ライン圧力センサ、８は供給ライン
温度センサで共に供給ポンプ５の吐出管に設けられてい
る。９はＮｏ．１燃焼室用圧力検知センサでＮｏ．１燃
焼室の冷却水出口に設けられている。１１はＮｏ．１燃
焼室用温度検知センサでＮｏ．１燃焼室用圧力検知セン
サ９の近くに設けられている。１０はｎ番燃焼室用圧力
検知センサでｎ番燃焼室の冷却水出口に設けられてい
る。１２はｎ番燃焼室用温度検知センサでｎ番燃焼室用
圧力検知センサ１０の近くに設けられている。EXAMPLES Examples will be described with reference to FIGS. FIG. 1 is a diagram of a place where a detection sensor is installed according to the embodiment, FIG. 2 is a block diagram of a measurement system according to the embodiment, and FIG. A pressure sensor and a temperature sensor for detecting combustion gas leakage are installed at the cooling water outlet of each cylinder of the engine. In order to constantly monitor the signal from the detection sensor, the detection signal is LED-displayed for each cylinder. A threshold value is provided for the value of the pressure or temperature to be monitored, and in the case of an abnormality, the alarm level value has a function of detecting an abnormality. In the figure,
1 is an engine body, 2 is an engine combustion chamber, 3 is a cooling water inlet pipe, 4
Is a cooling water tank, and 5 is a supply pump, which is a known element of an internal combustion engine. Reference numeral 7 is a supply line pressure sensor, and 8 is a supply line temperature sensor, both of which are provided in the discharge pipe of the supply pump 5. No. 9 is No. The No. 1 combustion chamber pressure sensor. It is provided at the cooling water outlet of one combustion chamber. No. 11 is No. No. 1 in the temperature detection sensor for the combustion chamber. It is provided near the pressure detection sensor 9 for one combustion chamber. Reference numeral 10 is a pressure detection sensor for the nth combustion chamber, which is provided at the cooling water outlet of the nth combustion chamber. Reference numeral 12 denotes an n-th combustion chamber temperature detection sensor, which is provided near the n-th combustion chamber pressure detection sensor 10.

【０００７】２１は圧力検知センサ、２２は温度検知セ
ンサで共に各燃焼室毎に設けられている。２３は温度セ
ンサ入力装置、圧力センサ入力装置で圧力検知センサ２
１及び温度検知センサ２２がそれぞれ接続されている。
２４は温度圧力増巾変換器で温度センサ入力装置圧力セ
ンサ入力装置２３が接続されている。２５は監視表示装
置で温度圧力増巾装置２４に接続されている。２６は警
報機関停止信号器で監視表示装置２５に接続されてい
る。ＴH は警報レベル１、ＴHHは警報レベル２である。
ＳH は警報レベル１、ＳHHは警報レベル２、ＳL は警報
レベル３である。Reference numeral 21 is a pressure detection sensor, and 22 is a temperature detection sensor, both of which are provided for each combustion chamber. Reference numeral 23 denotes a temperature sensor input device and a pressure sensor input device, which are pressure detection sensors 2
1 and the temperature detection sensor 22 are connected to each other.
A temperature / pressure amplification converter 24 is connected to the temperature sensor input device and the pressure sensor input device 23. Reference numeral 25 is a monitoring display device, which is connected to the temperature / pressure amplification device 24. An alarm engine stop signal 26 is connected to the monitor display device 25. T H is alarm level 1 and T HH is alarm level 2.
S H is alarm level 1, S HH is alarm level 2, and S L is alarm level 3.

【０００８】前記実施例の作用を説明する。供給ポンプ
５は冷却水タンク４の冷却水を吸って冷却水入口管３を
通して各機関燃焼室２まわりの水室へ送る。前記冷却水
は各機関燃焼室２を冷やして冷却水タンクへ返される。
供給ライン圧力センサ７、供給ライン温度センサ８は供
給ポンプ５の出口の冷却水の圧力及び温度を検知する。
Ｎｏ．１燃焼室用圧力検知センサ９はＮｏ．１燃焼室ま
わりの冷却水の出口の圧力を検知し、ｎ番燃焼室用圧力
検出センサ１０はｎ番燃焼室まわりの冷却水出口の圧力
を検知し、それぞれ圧力センサ入力装置２３へ信号を送
る。Ｎｏ．１燃焼室用温度検知センサ１１はＮｏ．１燃
焼室まわりの冷却水の出口の冷却水温度を検知し、ｎ番
燃焼室用温度検出センサ１２はｎ番燃焼室まわりの冷却
水の出口の冷却水温度を検知しそれぞれその信号を温度
センサ入力装置２３へ送る。温度センサ入力装置、圧力
センサ入力装置２３は、信号を温度圧力増巾変換装置２
４に送りアナログ信号として監視表示装置２５へ送ら
れ、監視表示装置２５はシリンダ別に圧力、温度の値を
図３に示すようにＬＥＤ表示する。The operation of the above embodiment will be described. The supply pump 5 sucks the cooling water in the cooling water tank 4 and sends it to the water chamber around each engine combustion chamber 2 through the cooling water inlet pipe 3. The cooling water cools each engine combustion chamber 2 and is returned to the cooling water tank.
The supply line pressure sensor 7 and the supply line temperature sensor 8 detect the pressure and temperature of the cooling water at the outlet of the supply pump 5.
No. No. 1 combustion chamber pressure detection sensor 9 is No. 1 The pressure at the outlet of the cooling water around the combustion chamber is detected, the pressure detection sensor 10 for the nth combustion chamber detects the pressure at the outlet of the cooling water around the nth combustion chamber, and sends a signal to the pressure sensor input device 23, respectively. . No. No. 1 combustion chamber temperature detection sensor 11 1 The temperature of the cooling water at the outlet of the cooling water around the combustion chamber is detected, and the temperature detection sensor 12 for the n-th combustion chamber detects the temperature of the cooling water at the outlet of the cooling water around the n-th combustion chamber, and the signals thereof are used as temperature sensors. Send to the input device 23. The temperature sensor input device and the pressure sensor input device 23 convert the signal into the temperature / pressure amplification conversion device 2
4 is sent to the monitor display device 25 as an analog signal, and the monitor display device 25 displays the pressure and temperature values for each cylinder by LED as shown in FIG.

【０００９】前記監視表示においてはそれぞれシリンダ
別に設定レベルを設け警報レベル１，２，３と表示す
る。警報機関停止信号器２６は、監視表示装置２５から
信号をそれぞれ受け警報或は機関停止信号を発生する。
冷却水の温度は供給ポンプ５の出口（供給ライン温度検
知センサ８が検知）より燃焼室出口（Ｎｏ．１燃焼室用
温度検知センサ１１，ｎ番燃焼室用温度検知センサ１２
が検知）の方が高くなるが正常の場合はある一定の範囲
内である。燃焼ガスが冷却水内に漏れると燃焼室出の冷
却水温度が上る。図３に示すとおり冷却水温度ＴH で警
報レベル１、ＴHHで警報レベル２とする。冷却水の圧力
は正常の場合は供給ポンプ出口（供給ライン圧力検知セ
ンサ７が検知）と燃焼室出口（Ｎｏ．１燃焼室用圧力検
知センサ９，ｎ番燃焼室用圧力検知センサ１０が検知）
と略同じである。燃焼ガスが冷却水内に漏れると燃焼室
出口の冷却水の圧力が上る。図３の圧力ＳH で警報レベ
ル１、圧力ＳHHで警報レベル２とする。燃焼室の損傷が
大きくなると冷却水が逆に燃焼室内に漏れて冷却水の圧
力が下り図３の圧力ＳL で警報レベル３とする。警報機
関停止信号器２６は前記警報レベルに応じ警報或は機関
停止信号を発生し事故の防止を図る。In the monitoring display, a set level is provided for each cylinder and alarm levels 1, 2 and 3 are displayed. The alarm engine stop signal device 26 receives a signal from the monitor display device 25 and generates an alarm or an engine stop signal.
The temperature of the cooling water is measured from the outlet of the supply pump 5 (detected by the supply line temperature detection sensor 8) to the combustion chamber outlet (No. 1 combustion chamber temperature detection sensor 11, nth combustion chamber temperature detection sensor 12).
Is higher than normal detection), but it is within a certain range when normal. When the combustion gas leaks into the cooling water, the temperature of the cooling water exiting the combustion chamber rises. As shown in FIG. 3, an alarm level 1 is set at the cooling water temperature T H , and an alarm level 2 is set at T HH . When the pressure of the cooling water is normal, the supply pump outlet (the supply line pressure detection sensor 7 detects) and the combustion chamber outlet (No. 1 combustion chamber pressure detection sensor 9 and the nth combustion chamber pressure detection sensor 10)
Is almost the same as. When the combustion gas leaks into the cooling water, the pressure of the cooling water at the outlet of the combustion chamber rises. An alarm level 1 is set at the pressure S H in FIG. 3, and an alarm level 2 is set at the pressure S HH . When the damage to the combustion chamber becomes large, the cooling water leaks into the combustion chamber to the contrary, the pressure of the cooling water decreases , and the alarm level 3 is set at the pressure S L in FIG. The alarm engine stop signal device 26 generates an alarm or an engine stop signal according to the alarm level to prevent an accident.

【００１０】[0010]

【発明の効果】本発明の内燃機関燃焼ガス漏洩検知装置
を設置することにより燃焼室冷却部周辺のシリンダライ
ナ，シリンダカバーの異常（割れ等の損傷）を早期に検
知することができる。よって本発明は内燃機関の燃焼ガ
スの漏洩を早期に検知する装置を提供できる。By installing the internal combustion engine combustion gas leakage detection device of the present invention, an abnormality (damage such as crack) of the cylinder liner and the cylinder cover around the combustion chamber cooling portion can be detected at an early stage. Therefore, the present invention can provide an apparatus for early detecting the leakage of combustion gas of an internal combustion engine.

【図面の簡単な説明】[Brief description of drawings]

【図１】実施例の検知センサ設置場所の図。FIG. 1 is a diagram of a location where a detection sensor according to an embodiment is installed.

【図２】実施例の計測系のブロック線図。FIG. 2 is a block diagram of a measurement system according to an embodiment.

【図３】実施例の監視表示の図。FIG. 3 is a diagram of a monitor display of the embodiment.

【符号の説明】[Explanation of symbols]

１…機関本体、２…機関燃焼室、３…冷却水入口管、５
…供給ポンプ、９…Ｎｏ．１燃焼室用圧力検知センサ、
１０…ｎ番燃焼室用圧力検知センサ、１１…Ｎｏ．１燃
焼室用温度検知センサ、１２…ｎ番燃焼室用温度検知セ
ンサ、２１…圧力検知センサ、２２…温度検知センサ、
２３…温度センサ入力装置圧力センサ入力装置、２４…
温度圧力増巾変換器、２５…監視表示装置、２６…警報
機関停止信号器。1 ... Engine body, 2 ... Engine combustion chamber, 3 ... Cooling water inlet pipe, 5
… Supply pump, 9… No. 1 Combustion chamber pressure sensor,
No. 10 ... No. n combustion chamber pressure detection sensor, 11 ... No. DESCRIPTION OF SYMBOLS 1 combustion chamber temperature detection sensor, 12 ... nth combustion chamber temperature detection sensor, 21 ... pressure detection sensor, 22 ... temperature detection sensor,
23 ... Temperature sensor input device Pressure sensor input device, 24 ...
Temperature / pressure amplification converter, 25 ... Monitoring display device, 26 ... Alarm engine stop signal device.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 各燃焼室を冷却する冷却水系に各シリン
ダ毎に設置された温度センサ（１１），（１２），（２
２）及び圧力センサ（９），（１０），（２１）と、前
記温度センサ及び圧力センサの信号を増巾変換する機能
を有する装置（２４）と、前記冷却水の温度及び圧力を
表示する機能を有する装置（２５）と、温度及び圧力が
設定レベル以上又は以下では警報を発生する機能を有す
る装置（２６）とを有してなる内燃機関の燃焼ガス漏洩
検知装置。1. A temperature sensor (11), (12), (2) provided for each cylinder in a cooling water system for cooling each combustion chamber.
2) and pressure sensors (9), (10) and (21), a device (24) having a function of increasing and converting the signals of the temperature sensor and the pressure sensor, and the temperature and pressure of the cooling water are displayed. A combustion gas leakage detection device for an internal combustion engine, comprising a device (25) having a function and a device (26) having a function of generating an alarm when temperature and pressure are above or below a set level.
JP35113092A 1992-12-07 1992-12-07 Combustion gas leak detection device for internal combustion engine Expired - Fee Related JP3188003B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35113092A JP3188003B2 (en) 1992-12-07 1992-12-07 Combustion gas leak detection device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35113092A JP3188003B2 (en) 1992-12-07 1992-12-07 Combustion gas leak detection device for internal combustion engine

Publications (2)

Publication Number Publication Date
JPH06174580A true JPH06174580A (en) 1994-06-24
JP3188003B2 JP3188003B2 (en) 2001-07-16

Family

ID=18415254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35113092A Expired - Fee Related JP3188003B2 (en) 1992-12-07 1992-12-07 Combustion gas leak detection device for internal combustion engine

Country Status (1)

Country Link
JP (1) JP3188003B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
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KR20020082524A (en) * 2001-04-24 2002-10-31 현대자동차주식회사 a combustion gas leak sensing apparatus for a head gasket of engine
KR100371766B1 (en) * 2000-12-01 2003-02-11 기아자동차주식회사 Burning gas leaking sensor
KR100448123B1 (en) * 2002-10-04 2004-09-10 현대자동차주식회사 Device for knowing crack of cylinder head
KR100482576B1 (en) * 2002-10-04 2005-04-14 현대자동차주식회사 Gas outflow testing device for vehicle engine
CN106404294A (en) * 2016-10-31 2017-02-15 苏州工业园区格比机电有限公司 Plugging device for test of engine cooler
FR3143687A1 (en) * 2022-12-19 2024-06-21 Psa Automobiles Sa ARRANGEMENT OF A THERMAL ENGINE AND METHOD FOR CONTROLLING SUCH ARRANGEMENT

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Publication number Priority date Publication date Assignee Title
KR100371766B1 (en) * 2000-12-01 2003-02-11 기아자동차주식회사 Burning gas leaking sensor
KR20020082524A (en) * 2001-04-24 2002-10-31 현대자동차주식회사 a combustion gas leak sensing apparatus for a head gasket of engine
KR100448123B1 (en) * 2002-10-04 2004-09-10 현대자동차주식회사 Device for knowing crack of cylinder head
KR100482576B1 (en) * 2002-10-04 2005-04-14 현대자동차주식회사 Gas outflow testing device for vehicle engine
CN106404294A (en) * 2016-10-31 2017-02-15 苏州工业园区格比机电有限公司 Plugging device for test of engine cooler
FR3143687A1 (en) * 2022-12-19 2024-06-21 Psa Automobiles Sa ARRANGEMENT OF A THERMAL ENGINE AND METHOD FOR CONTROLLING SUCH ARRANGEMENT

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