WO2009157436A1 - ピストンリング摺動状態モニタリング装置及び方法 - Google Patents
ピストンリング摺動状態モニタリング装置及び方法 Download PDFInfo
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- WO2009157436A1 WO2009157436A1 PCT/JP2009/061394 JP2009061394W WO2009157436A1 WO 2009157436 A1 WO2009157436 A1 WO 2009157436A1 JP 2009061394 W JP2009061394 W JP 2009061394W WO 2009157436 A1 WO2009157436 A1 WO 2009157436A1
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- piston ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating or supervising devices
- F02B77/083—Safety, indicating or supervising devices relating to maintenance, e.g. diagnostic device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating or supervising devices
- F02B77/089—Safety, indicating or supervising devices relating to engine temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F5/00—Piston rings, e.g. associated with piston crown
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- 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
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a piston ring sliding state monitoring apparatus and method.
- This application claims priority based on Japanese Patent Application No. 2008-165101 filed in Japan on June 24, 2008, the contents of which are incorporated herein by reference.
- Patent Document 1 is presented as a prior art document disclosing the capacitance detection type film thickness measurement technique as described above.
- the above-described prior art provides an electronic circuit for supplying a charging current to the detection electrode in order to measure the capacitance, detecting a charging time, and discharging a charge charged in the detection electrode. Since this is necessary, the cost of the apparatus increases. In addition, it is necessary to make a through hole in the cylinder and cylinder liner by machining, and to install the detection electrode at the tip of the through hole (piston ring sliding surface). Combustion gas leakage through the through hole may also occur. Therefore, development of a technique for detecting signs of seizure of the piston by a cheaper and simpler method has been desired.
- the present invention has been made in view of the above-described problems, and has the following objects. (1) Detecting signs of piston burn-in with an inexpensive device. (2) The sign of piston burn-in is detected by a simpler sensor installation method than before.
- a first piston ring sliding state monitoring device includes a temperature sensor that detects a temperature of a predetermined portion of a cylinder liner, a rotation sensor that detects rotation of an engine, a detection result of the temperature sensor, and a rotation sensor. Based on the detection result, a temperature data collecting unit that acquires temperature data at a predetermined location when the piston ring passes, and detecting the rotation of the piston ring based on the temperature data, A piston ring rotation state determination unit that determines signs.
- a second piston ring sliding state monitoring device is the first piston ring sliding state monitoring device comprising a plurality of temperature sensors in a cross section perpendicular to the reciprocating direction of the piston.
- a ring rotation state determination part detects rotation of a piston ring based on the average value of the temperature data regarding each temperature sensor.
- a third piston ring sliding state monitoring device is the above first or second piston ring sliding state monitoring device, wherein the piston ring rotation state determining unit is configured to detect a temperature based on temperature data. A fluctuation period is obtained, and this fluctuation period is detected as a rotation period of the piston ring.
- a first piston ring sliding state monitoring method includes a temperature detection step of detecting a temperature at a predetermined location of the cylinder liner, an engine rotation detection step of detecting engine rotation, a temperature detection result, and A temperature data collecting step of acquiring temperature data at a predetermined location when the piston ring passes through the predetermined location based on a detection result of rotation; a piston ring rotation detecting step of detecting rotation of the piston ring based on the temperature data; A determination step of determining an indication of piston burn-in based on the detection result of the rotation of the piston ring.
- the second piston ring sliding state monitoring method is the temperature detection step in the first piston ring sliding state monitoring method, wherein the temperature at a plurality of points in a cross section perpendicular to the reciprocating direction of the piston is used.
- the temperature data collection step temperature data relating to a plurality of locations is acquired, and in the piston ring rotation detection step, the rotation of the piston ring is detected based on the average value of each temperature data.
- the third piston ring sliding state monitoring method is the above-described first or second piston ring sliding state monitoring method.
- the temperature obtained in the temperature data collecting step is used. Based on the data, the fluctuation cycle of temperature is obtained, and this fluctuation cycle is detected as the rotation cycle of the piston ring.
- the rotation of the piston ring is detected based on the temperature at a predetermined location of the cylinder liner, and the sign of piston burn-in is determined based on the state of this rotation.
- FIG. 1 It is a block diagram which shows the structure of the piston ring sliding state monitoring apparatus which concerns on one Embodiment of this invention.
- it is sectional drawing which shows the positional relationship of arrangement
- it is sectional drawing which shows the positional relationship of arrangement
- FIG. 1 is a block diagram showing a configuration of a piston ring sliding state monitoring device according to an embodiment of the present invention.
- the piston ring sliding state monitoring device includes four temperature sensors 1a, 1b, 1c, and 1d, a rotary encoder 2, a temperature data collection unit 3, and a piston ring rotation state determination unit 4. As shown in FIG. S is the object of monitoring.
- the engine S to be monitored has a well-known configuration and includes a piston P that reciprocates in a cylindrical cylinder liner s1.
- the piston P is a cylindrical member, and a piston ring p1 is fitted and mounted in a ring-shaped groove formed on the peripheral surface.
- the piston ring p ⁇ b> 1 is a metal member formed in a ring shape as a whole, and is cut out at one place because it needs to fit into the groove of the piston P.
- the notch part in piston ring p1 is called a joint gap.
- the four temperature sensors 1a, 1b, 1c, 1d and the rotary encoder 2 are provided in advance in the engine S in order to control the engine S described above. It has been. That is, the four temperature sensors 1a, 1b, 1c, and 1d and the rotary encoder 2 are arranged such that the cylinder liner s1 of the piston ring p1 provided on the piston P (more precisely, the piston ring sliding surface s2 that is the surface of the cylinder liner s1) ) Is not provided separately for detecting the sliding state.
- the four temperature sensors 1a, 1b, 1c, and 1d are, for example, thermistors, thermocouples, or resistance temperature detectors, and are embedded at equal intervals in the circumferential direction of the cylinder liner s1. That is, each temperature sensor 1 a, 1 b, 1 c, 1 d measures the temperature at four points in the circumferential direction of the cylinder liner s 1 and outputs it to the temperature data collection unit 3.
- 2A and 2B are sectional views showing the positional relationship between the arrangement of the temperature sensors 1a, 1b, 1c and 1d and the joint gap A of the piston ring p1.
- 2A shows a cross section of the cylinder liner s1 in a direction parallel to the reciprocating direction of the piston P
- FIG. 2B shows a cross section of the cylinder liner s1 in a direction perpendicular to the reciprocating direction of the piston P.
- the temperature sensors 1a, 1b, 1c, and 1d are disposed at four positions within a predetermined orthogonal cross section (arrangement cross section) in the reciprocating direction of the piston P (90 in the circumferential direction of the cylinder liner s1).
- the piston ring p1 provided in the piston P reciprocates through the arrangement cross sections of the temperature sensors 1a, 1b, 1c, and 1d arranged as described above in accordance with the reciprocating motion of the piston P in the cylinder liner s1.
- the rotary encoder 2 is a rotation sensor that detects the rotation of the engine S.
- a pulse signal corresponding to the rotation state is determined from the temperature data collection unit 3 and the piston ring rotation state determination. Output to part 4.
- the pulse signal indicates the operating state of the engine S and the crank angle of the engine S, that is, the position of the piston P in the reciprocating motion (position of the piston ring p1).
- the temperature data collection unit 3 captures and stores the temperature detection signals input from the temperature sensors 1a, 1b, 1c, and 1d based on the pulse signal input from the rotary encoder 2. That is, the temperature data collection unit 3 takes in the temperature detection signals input from the temperature sensors 1a, 1b, 1c, and 1d when the piston ring p1 passes through the arrangement cross section, so that the piston ring p1 has the arrangement cross section.
- the temperature of the cylinder liner s1 at the time of passing through is acquired for each of the temperature sensors 1a, 1b, 1c, and 1d, and data (temperature data) indicating these temperatures is generated and stored (accumulated).
- the temperature data collection unit 3 provides the temperature data to the piston ring rotation state determination unit 4 in response to a request from the piston ring rotation state determination unit 4.
- the piston ring rotation state determination unit 4 determines the rotation state of the piston ring p1 when the engine S is operating based on the temperature data and the pulse signal input from the rotary encoder 2.
- the portion facing the gap gap A has a higher temperature than the gap other than the gap gap A due to the influence of combustion gas.
- the rotational state (for example, the number of rotations and the rotation speed) of the joint gap A based on the temperature difference between the part other than the joint gap and the determination result is output to an external engine control device (not shown).
- the piston P and the piston ring p1 reciprocate in the cylinder liner s1, but the piston ring p1 reciprocates in the cylinder liner s1 while rotating around the piston P. That is, the piston ring p ⁇ b> 1 is attached to the piston P in a state of being fitted in a ring-shaped groove formed on the peripheral surface of the piston P, and is not completely fixed to the piston P. Therefore, the piston ring p1 rotates in a certain direction due to the influence of friction with the cylinder liner s1 in the reciprocating motion.
- each temperature sensor 1a, 1b, 1c, 1d has the highest temperature when the joint gap A passes through.
- the temperature sensors 1a, 1b, 1c, and 1d are arranged at an angle of 90 ° with respect to the circumferential direction of the cylinder liner s1, the highest temperature among the temperature sensors 1a, 1b, 1c, and 1d. The time will be different.
- FIG. 4 shows an engine S speed (engine speed) V, an oil film thickness L between the piston ring p1 and the cylinder liner s1, and a piston ring rotation index (an index indicating the number of rotations of the piston ring p1 per day).
- N engine speed
- N oil film thickness
- the piston ring rotates.
- the index N indicates a relatively large value.
- the oil film thickness L becomes relatively small although the engine speed V is substantially the same value as in the period from December 8 to December 16, as after December 20.
- the piston ring rotation index N is lower than the period from December 8 to December 16. That is, the piston ring p1 rotates satisfactorily when the oil film thickness L is sufficient, but rotates slowly when the oil film thickness L becomes thin, and finally stops.
- the rotation of the piston ring p1 since the rotation of the piston ring p1 has a correlation with the oil film thickness L of the lubricating oil, by measuring the rotation of the piston ring p1 instead of measuring the oil film thickness L, the oil film thickness L It is possible to detect a sign that the engine S becomes thinner and the engine S is burned. Further, the rotation of the piston ring p1 can be detected as the rotation of the joint gap A as shown in FIG.
- the temperature data collection unit 3 acquires and stores the temperature data shown in FIG. 3 for each of the temperature sensors 1a, 1b, 1c, and 1d. Then, the piston ring rotation state determination unit 4 generates a cycle in which the highest temperature is generated based on the temperature data of the temperature sensors 1a, 1b, 1c, and 1d stored in the temperature data collection unit 3 (that is, the gap gap A). ) Is detected.
- the piston ring rotation state determination unit 4 obtains the above-described cycle in which the highest temperature is generated for each of the temperature sensors 1a, 1b, 1c, and 1d, and uses the average value as the final rotation cycle of the gap gap A . Further, the piston ring rotation state determination unit 4 detects a sign of the burn-in of the engine S by determining whether or not the rotation cycle is equal to or less than a predetermined threshold value. At this time, when the generation cycle of the highest temperature is equal to or less than the threshold value, the piston ring rotation state determination unit 4 determines that there is a sign of the engine S being burned and outputs an alarm to the outside.
- the sign of the burn-in of the engine S is determined by detecting the rotation period of the joint gap A based on the temperature data of the temperature sensors 1a, 1b, 1c, and 1d.
- the sign of piston burn-in can be detected by a cheaper and simpler method than before.
- this invention is not limited to the said embodiment, For example, the following modifications can be considered.
- the number of temperature sensors may be other than four.
- four temperature sensors 1a, 1b, 1c, and 1d are provided in one cross section orthogonal to the reciprocating direction of the piston P. A sensor may be provided.
- the rotation of the piston ring p1 is detected by detecting the position of the joint gap A in the above embodiment, the present invention is not limited to this. The rotation of the piston ring p1 may be detected by other methods.
- the rotation of the piston ring is detected based on the temperature at a predetermined location of the cylinder liner, and the sign of piston burn-in is determined based on the state of this rotation.
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- Engineering & Computer Science (AREA)
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- Testing Of Engines (AREA)
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Abstract
Description
本願は、2008年6月24日に日本に出願された特願2008-165101号に基づき優先権を主張し、その内容をここに援用する。
例えば、上記のような静電容量検出型の膜厚計測技術を開示している先行技術文献として、下記特許文献1を提示する。
また、機械加工によってシリンダ及びシリンダライナに貫通穴をあけ、この貫通孔の先端部位(ピストンリング摺動面)に検出電極を設置する必要がある為、検出電極の設置に大変な手間が掛かると共に貫通穴を通じての燃焼ガス漏れが発生する可能性もある。したがって、より安価で簡便な方法により、ピストンの焼き付きの兆候を検知する技術の開発が切望されていた。
(1)従来よりも安価な装置でピストンの焼き付きの兆候を検知する。
(2)従来よりも簡便なセンサの設置方法でピストンの焼き付きの兆候を検知する。
本発明に係る第1のピストンリング摺動状態モニタリング装置は、シリンダライナの所定箇所の温度を検出する温度センサと、エンジンの回転を検出する回転センサと、前記温度センサの検出結果及び回転センサの検出結果に基づいてピストンリングが通過する際における所定箇所の温度データを取得する温度データ収集部と、温度データに基づいてピストンリングの回転を検出し、この回転の状態に基づいてピストンの焼き付きの兆候を判定するピストンリング回転状態判定部と、を備える。
図1は、本発明の一実施形態に係るピストンリング摺動状態モニタリング装置の構成を示すブロック図である。本ピストンリング摺動状態モニタリング装置は、4つの温度センサ1a、1b、1c、1d、ロータリエンコーダ2、温度データ収集部3及びピストンリング回転状態判定部4を備えるものであり、図示するようにエンジンSをモニタリングの対象とする。
(1)上記実施形態では4つの温度センサ1a、1b、1c、1dを設けるようにしたが、温度センサの個数は4個以外でも良い。
(2)上記実施形態ではピストンPの往復方向に直交する1つの断面に4つの温度センサ1a、1b、1c、1dを設けるようにしたが、ピストンPの往復方向に直交する複数の断面に温度センサを設けるようにしても良い。
(3)上記実施形態では合口隙間Aの位置を検出することによってピストンリングp1の回転を検出したが、本発明はこれに限定されない。他の方法によってピストンリングp1の回転を検出するようにしても良い。
Claims (6)
- シリンダライナの所定箇所の温度を検出する温度センサと、
エンジンの回転を検出する回転センサと、
この温度センサの検出結果及び回転センサの検出結果に基づいてピストンリングが通過する際における所定箇所の温度データを取得する温度データ収集部と、
温度データに基づいてピストンリングの回転を検出し、当該回転の状態に基づいてピストンの焼き付きの兆候を判定するピストンリング回転状態判定部と、
を備えるピストンリング摺動状態モニタリング装置。 - ピストンの往復方向に直行する断面内に複数の温度センサを備え、
前記ピストンリング回転状態判定部は、各温度センサに関する温度データの平均値に基づいてピストンリングの回転を検出する請求項1記載のピストンリング摺動状態モニタリング装置。 - 前記ピストンリング回転状態判定部は、温度データに基づいて温度の変動周期を求め、この変動周期をピストンリングの回転周期として検出する請求項1または2記載のピストンリング摺動状態モニタリング装置。
- シリンダライナの所定箇所の温度を検出する温度検出工程と、
エンジンの回転を検出するエンジン回転検出工程と、
温度の検出結果及び回転の検出結果に基づいてピストンリングが所定箇所を通過する際における所定箇所の温度データを取得する温度データ収集工程と、
温度データに基づいてピストンリングの回転を検出するピストンリング回転検出工程と、
このピストンリングの回転の検出結果に基づいてピストンの焼き付きの兆候を判定する判定工程と、
を備えるピストンリング摺動状態モニタリング方法。 - 前記温度検出工程では、ピストンの往復方向に直行する断面内の複数箇所の温度を検出し、
前記温度データ収集工程では、複数箇所に関する温度データを取得し、
前記ピストンリング回転検出工程では、各温度データの平均値に基づいてピストンリングの回転を検出する請求項4記載のピストンリング摺動状態モニタリング方法。 - 前記ピストンリング回転検出工程では、温度データ収集工程で得られた温度データに基づいて温度の変動周期を求め、この変動周期をピストンリングの回転周期として検出する請求項4または5記載のピストンリング摺動状態モニタリング方法。
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KR1020107028711A KR101248578B1 (ko) | 2008-06-24 | 2009-06-23 | 피스톤 링 슬라이딩 상태 모니터링 장치 및 방법 |
US13/000,781 US8429958B2 (en) | 2008-06-24 | 2009-06-23 | Apparatus and method for monitoring sliding state of piston |
EP20090770146 EP2295951A4 (en) | 2008-06-24 | 2009-06-23 | DEVICE AND METHOD FOR MONITORING SLIDING CONDITIONS OF A PISTON RING |
CN200980123582.XA CN102066895B (zh) | 2008-06-24 | 2009-06-23 | 活塞环滑动状态监控装置及方法 |
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JP2008165101A JP5182627B2 (ja) | 2008-06-24 | 2008-06-24 | ピストンリング摺動状態モニタリング装置及び方法 |
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US8844341B2 (en) * | 2013-03-04 | 2014-09-30 | Federal-Mogul Corporation | Data collector for an internal engine component |
CN106438040A (zh) * | 2016-12-20 | 2017-02-22 | 中国船舶重工集团公司第七研究所 | 一种柴油机拉缸故障预警装置及预警方法 |
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- 2009-06-23 CN CN200980123582.XA patent/CN102066895B/zh not_active Expired - Fee Related
- 2009-06-23 EP EP20090770146 patent/EP2295951A4/en not_active Withdrawn
- 2009-06-23 KR KR1020107028711A patent/KR101248578B1/ko not_active IP Right Cessation
- 2009-06-23 US US13/000,781 patent/US8429958B2/en not_active Expired - Fee Related
- 2009-06-23 WO PCT/JP2009/061394 patent/WO2009157436A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
JP2010008112A (ja) | 2010-01-14 |
US8429958B2 (en) | 2013-04-30 |
EP2295951A4 (en) | 2013-02-27 |
CN102066895B (zh) | 2013-03-27 |
KR20110020851A (ko) | 2011-03-03 |
JP5182627B2 (ja) | 2013-04-17 |
EP2295951A1 (en) | 2011-03-16 |
CN102066895A (zh) | 2011-05-18 |
US20110113873A1 (en) | 2011-05-19 |
KR101248578B1 (ko) | 2013-03-28 |
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