JP2016170169A - ピストンスラップからエンジンノックを識別するシステム及び方法 - Google Patents
ピストンスラップからエンジンノックを識別するシステム及び方法 Download PDFInfo
- Publication number
- JP2016170169A JP2016170169A JP2016041659A JP2016041659A JP2016170169A JP 2016170169 A JP2016170169 A JP 2016170169A JP 2016041659 A JP2016041659 A JP 2016041659A JP 2016041659 A JP2016041659 A JP 2016041659A JP 2016170169 A JP2016170169 A JP 2016170169A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- piston
- signal
- piston slap
- engine
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000007423 decrease Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 33
- 239000000446 fuel Substances 0.000 description 22
- 239000007789 gas Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 8
- 239000007800 oxidant agent Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 238000010248 power generation Methods 0.000 description 6
- 238000007906 compression Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 for example Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 206010021580 Inadequate lubrication Diseases 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- 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
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
-
- 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
-
- 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
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- 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
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/225—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines circuit arrangements therefor
- G01L23/226—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines circuit arrangements therefor using specific filtering
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/286—Interface circuits comprising means for signal processing
- F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/025—Engine noise, e.g. determined by using an acoustic sensor
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/152—Digital data processing dependent on pinking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Engines (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
【解決手段】スラスト面74及びアンチスラスト面76を備えるシリンダ26の基本周波数を取得すること、シリンダ26上に搭載された第1のノックセンサ32から第1の信号を受信すること、及び、基本周波数及び基本周波数の1つ又は複数の高調波周波数における第1の信号の第1の複数の振幅がピストンスラップ閾値を超えるかどうかを評価することによって、エンジンノックからピストンスラップを識別する。
【選択図】図3
Description
12 エンジン、燃焼エンジン、往復動エンジン、4ストロークエンジン
14 燃焼チャンバ
16 空気供給部
18 酸化剤、空気
20 燃料
22 燃料供給部
24 ピストン
26 シリンダ
28 シャフト
30 負荷
32 ノックセンサ、センサ
34 エンジン制御ユニット(ECU)
36 ピストン組立体
38 内側環状壁
40 円柱キャビティ、キャビティ
42 軸方向軸又は方向、軸方向、軸方向軸
44 半径方向軸又は方向
46 円周方向軸又は方向
48 上部部分、上部ランド
50 クランクシャフト
52 接続ロッド
54 ピン
56 燃料注入器
58 吸気弁、弁
60 排気弁、弁
62 クランクシャフトセンサ
64 プロセッサ
66 メモリ
68 実際のピストン軸
70 所望のピストン軸
72 角度
74 スラスト面
76 アンチスラスト面
78 サンプルスペクトルプロット、ノックセンサデータのスペクトルプロット
80 データ
82 水平軸
84 垂直軸
86 ライン、基本周波数
88 第2高調波周波数、高調波
90 第3高調波周波数、高調波
92 第4高調波周波数、高調波
94 第5高調波周波数、高調波
96 第6高調波周波数、高調波
98 プロセス
100 ブロック
102 ブロック
104 ブロック
106 意思決定
108 ブロック
110 プロセス
112 ブロック
114 ブロック
116 ブロック
118 意思決定
120 ブロック
Claims (20)
- 往復動デバイスにおいてピストンスラップからエンジンノックを識別する方法であって、
スラスト面(74)及びアンチスラスト面(76)を備えるシリンダの基本周波数(86)を取得すること、
前記シリンダ(26)上に配設された第1のノックセンサ(32)から第1の信号を受信すること、
ピストンスラップの存在を特定することであって、前記基本周波数(86)及び前記基本周波数(86)の1つ又は複数の高調波周波数における前記第1の信号の複数の振幅がピストンスラップ閾値を超えるかどうかを評価することを含む、特定することを含む、方法。 - 前記1つ又は複数の高調波周波数が、前記基本周波数(86)の整数倍である、請求項1記載の方法。
- 前記1つ又は複数の高調波周波数が、第1、第2、第3、第4、第5、及び第6の高調波周波数を含む、請求項2記載の方法。
- エンジンノックの存在を特定することであって、前記1つ又は複数の高調波周波数が増加するにつれて、前記複数の振幅が減少するか否かを評価することを含む、特定することを更に含む、請求項1記載の方法。
- 前記第1のノックセンサ(32)が、前記シリンダ(26)の前記スラスト面(74)上に配設され、前記シリンダ(26)内でピストン移動軸に垂直に配向する、請求項1記載の方法。
- ピストンスラップの存在の知覚可能な指示をユーザに提供することを更に含む、請求項1記載の方法。
- 或る周波数において、ピストンスラップが、エンジンノックが前記周波数で存在する場合に存在しないと特定することを更に含む、請求項4記載の方法。
- 前記シリンダ(26)の前記アンチスラスト面(76)上に配設された第2のノックセンサ(32)から第2の信号を受信すること、及び、
ピストンスラップ信号を導出するため前記第1の信号から前記第2の信号を減算することを更に含む、請求項5記載の方法。 - システムであって、
往復動デバイスを制御するように構成されるコントローラを備え、前記コントローラが、プロセッサを備え、前記プロセッサは、
スラスト面(74)及びアンチスラスト面(76)を備えるシリンダ(26)の基本周波数(86)を取得し、
前記シリンダ(26)上に配設された第1のノックセンサ(32)から第1の信号を受信し、
ピストンスラップの存在を特定するように構成され、前記特定することは、前記基本周波数(86)及び前記基本周波数(86)の1つ又は複数の高調波周波数における前記第1の信号の複数の振幅がピストンスラップ閾値を超えるかどうかを評価することを含む、システム。 - 前記1つ又は複数の高調波周波数が、第1、第2、第3、第4、第5、及び第6の高調波周波数を含む、請求項9記載のシステム。
- エンジンノックの存在を特定することであって、前記1つ又は複数の高調波周波数が増加するにつれて前記複数の振幅が減少するか否かを評価することを含む、特定することを更に含む、請求項9記載のシステム。
- 前記第1のノックセンサ(32)が、前記シリンダ(26)の前記スラスト面(74)上に配設され、前記シリンダ(26)内でピストン移動軸に垂直に配向する、請求項9記載のシステム。
- 前記プロセッサが、ピストンスラップの存在の知覚可能な指示をユーザに提供するように更に構成される、請求項12記載のシステム。
- 前記プロセッサは、
前記シリンダ(26)の前記アンチスラスト面(76)上に配設された第2のノックセンサ(32)から第2の信号を受信し、
ピストンスラップ信号を導出するため前記第1の信号から前記第2の信号を減算するように更に構成される、請求項12記載のシステム。 - 実行可能命令を含む非一時的コンピュータ可読媒体であって、前記実行可能命令は、実行されると、プロセッサが、
スラスト面(74)及びアンチスラスト面(76)を備えるシリンダ(26)の基本周波数(86)を取得し、
前記シリンダ(26)の前記スラスト面(74)上に配設された第1のノックセンサ(32)から第1の信号を受信し、
ピストンスラップの存在を特定するようにさせ、前記特定することは、前記基本周波数(86)及び前記基本周波数(86)の1つ又は複数の高調波周波数における前記第1の信号の複数の振幅がピストンスラップ閾値を超えるかどうかを評価することを含む、実行可能命令を含む非一時的コンピュータ可読媒体。 - 前記第1のノックセンサ(32)が、前記シリンダ(26)内でピストン移動軸に垂直に配向する、請求項15記載の実行可能命令を含む非一時的コンピュータ可読媒体。
- 前記プロセッサが、
前記シリンダ(26)の前記アンチスラスト面(76)上に配設された第2のノックセンサ(32)から第2の信号を受信し、
ピストンスラップ信号を導出するため前記第1の信号から前記第2の信号を減算するように更に構成される、請求項15記載の実行可能命令を含む非一時的コンピュータ可読媒体。 - エンジンノックの存在を特定することであって、前記1つ又は複数の高調波周波数が増加するにつれて前記複数の振幅が減少するか否かを評価することを含む、特定することを更に含む、請求項15記載の実行可能命令を含む非一時的コンピュータ可読媒体。
- 前記1つ又は複数の高調波周波数が、前記基本周波数(86)の整数倍である、請求項15記載の実行可能命令を含む非一時的コンピュータ可読媒体。
- 前記プロセッサが、ピストンスラップの存在の知覚可能な指示をユーザに提供するように更に構成される、請求項15記載の実行可能命令を含む非一時的コンピュータ可読媒体。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/644,526 US9695761B2 (en) | 2015-03-11 | 2015-03-11 | Systems and methods to distinguish engine knock from piston slap |
US14/644,526 | 2015-03-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016170169A true JP2016170169A (ja) | 2016-09-23 |
JP6672018B2 JP6672018B2 (ja) | 2020-03-25 |
Family
ID=55588059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2016041659A Active JP6672018B2 (ja) | 2015-03-11 | 2016-03-04 | ピストンスラップからエンジンノックを識別するシステム及び方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US9695761B2 (ja) |
EP (1) | EP3067538B1 (ja) |
JP (1) | JP6672018B2 (ja) |
KR (1) | KR102258943B1 (ja) |
CN (1) | CN105971730B (ja) |
AU (1) | AU2016201059A1 (ja) |
BR (1) | BR102016004249B1 (ja) |
CA (1) | CA2921934C (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019044584A (ja) * | 2017-08-29 | 2019-03-22 | トヨタ自動車株式会社 | ノッキング判定装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3093466A4 (en) * | 2014-01-10 | 2017-06-07 | Yamaha Hatsudoki Kabushiki Kaisha | Four-cylinder engine and operating method for four-cylinder engine |
JP6312618B2 (ja) * | 2015-03-13 | 2018-04-18 | 日立オートモティブシステムズ株式会社 | 内燃機関の制御装置及び異常燃焼検出方法 |
US20160370255A1 (en) * | 2015-06-16 | 2016-12-22 | GM Global Technology Operations LLC | System and method for detecting engine events with an acoustic sensor |
WO2018044294A1 (en) * | 2016-08-31 | 2018-03-08 | General Electric Company | System and method for determining the timing of an engine event |
US11053868B2 (en) * | 2018-09-12 | 2021-07-06 | Ford Global Technologies, Llc | Method and system for determining piston slap |
CN113218495B (zh) * | 2021-04-30 | 2022-06-21 | 马勒汽车技术(中国)有限公司 | 发动机的活塞噪声的测试方法及装置 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4364260A (en) * | 1981-03-16 | 1982-12-21 | General Motors Corporation | Engine with knock sensing apparatus having multiple frequency tuning |
US5400644A (en) * | 1992-09-29 | 1995-03-28 | Motorola, Inc. | Knock detection system |
JP2002155795A (ja) * | 2000-11-21 | 2002-05-31 | Yamaha Motor Co Ltd | 多気筒エンジンのノッキング判別装置 |
JP2007009735A (ja) * | 2005-06-28 | 2007-01-18 | Toyota Motor Corp | 内燃機関の点火時期制御装置 |
JP2007231903A (ja) * | 2006-03-03 | 2007-09-13 | Yanmar Co Ltd | 内燃機関のノッキング判定装置 |
JP2009209751A (ja) * | 2008-03-04 | 2009-09-17 | Denso Corp | 内燃機関のノック検出装置 |
JP2011132814A (ja) * | 2009-12-22 | 2011-07-07 | Nissan Motor Co Ltd | 内燃機関のノック判定装置 |
JP2011236783A (ja) * | 2010-05-07 | 2011-11-24 | Toyota Motor Corp | 内燃機関の冷却装置 |
Family Cites Families (107)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4541383A (en) | 1981-02-17 | 1985-09-17 | Chevron Research Company | Method and apparatus for minimum knock operation of an internal combustion engine on low knock-rated fuel |
US4643023A (en) * | 1985-11-01 | 1987-02-17 | Capps David F | Vibration testing apparatus |
KR930009907B1 (ko) | 1988-10-04 | 1993-10-13 | 미쯔비시 덴끼 가부시끼가이샤 | 내연기관 제어장치 |
GB8910319D0 (en) | 1989-05-05 | 1989-06-21 | Austin Rover Group | A spark ignited internal combustion engine and a control system therefor |
EP0437057B1 (en) | 1990-01-08 | 1993-11-03 | Hitachi, Ltd. | Method and apparatus for detecting combustion conditions in a multicylinder internal combustion engine |
JP2792633B2 (ja) | 1990-02-09 | 1998-09-03 | 株式会社日立製作所 | 制御装置 |
EP0443708A2 (en) | 1990-02-21 | 1991-08-28 | Stresswave Technology Limited | An apparatus for controlling an internal combustion engine |
DE4006273A1 (de) | 1990-02-28 | 1991-09-26 | Forsch Kraftfahrwesen Und Fahr | Verfahren und vorrichtung zur ermittlung des verlaufs des innendrucks eines zylinders einer kolbenmaschine |
US5337240A (en) | 1990-09-20 | 1994-08-09 | Mitsubishi Denki Kabushiki Kaisha | Misfiring sensing apparatus |
US5111790A (en) | 1990-09-28 | 1992-05-12 | Prestolite Wire Corporation | Direct fire ignition system having individual knock detection sensor |
JPH04198731A (ja) | 1990-11-28 | 1992-07-20 | Mitsubishi Electric Corp | 内燃機関の失火検出装置 |
JPH04224260A (ja) | 1990-12-26 | 1992-08-13 | Nippondenso Co Ltd | 内燃機関の燃焼状態検出装置 |
FR2682718A1 (fr) | 1991-10-16 | 1993-04-23 | Siemens Automotive Sa | Procede et dispositif de detection de rates d'allumage du melange air/carburant d'alimentation d'un moteur a combustion interne propulsant un vehicule automobile et leurs applications. |
US5996398A (en) | 1992-01-22 | 1999-12-07 | Robert Bosch Gmbh | Device for knock detection in internal combustion engine |
DE4211645A1 (de) | 1992-04-07 | 1993-10-14 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Erkennung des Klopfens einer Brennkraftmaschine |
US5408863A (en) | 1993-04-15 | 1995-04-25 | Hughes Aircraft Company | Knock detector for internal combustion engine |
JPH06307953A (ja) | 1993-04-27 | 1994-11-04 | Hitachi Ltd | 物理量検出装置 |
US5392642A (en) | 1993-06-30 | 1995-02-28 | Cummins Engine Company, Inc. | System for detection of low power in at least one cylinder of a multi-cylinder engine |
JPH07280637A (ja) | 1994-04-01 | 1995-10-27 | Ngk Insulators Ltd | 失火センサ |
US5594649A (en) | 1994-12-19 | 1997-01-14 | Delco Electronics Corporation | Digitally reconfigurable engine knock detecting system |
US6104195A (en) | 1995-05-10 | 2000-08-15 | Denso Corporation | Apparatus for detecting a condition of burning in an internal combustion engine |
JP3541511B2 (ja) * | 1995-07-07 | 2004-07-14 | いすゞ自動車株式会社 | ピストン |
US5763769A (en) | 1995-10-16 | 1998-06-09 | Kluzner; Michael | Fiber optic misfire, knock and LPP detector for internal combustion engines |
JP3116826B2 (ja) | 1996-07-15 | 2000-12-11 | トヨタ自動車株式会社 | プレイグニッション検出装置 |
US5934256A (en) | 1997-03-04 | 1999-08-10 | Siemens Aktiengesellschaft | Method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine |
JPH1137898A (ja) | 1997-05-23 | 1999-02-12 | Daifuku Co Ltd | エンジン良否判定設備 |
JPH1136978A (ja) * | 1997-07-16 | 1999-02-09 | Unisia Jecs Corp | 内燃機関用ピストン |
BR9904839A (pt) | 1998-02-23 | 2000-07-18 | Cummins Engine Co Inc | Motor a explosão por compressão de carga pré-misturada com comtrole de combustão ótimo |
DE10015162B4 (de) | 1998-11-24 | 2019-08-01 | Scania Cv Ab | Anordnung und Verfahren zum Kalibrieren und/oder Überwachen des Verbrennungsablaufes in einem Verbrennungsmotor |
DE19920016A1 (de) | 1999-05-03 | 2000-11-16 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Klopfregelung bei Ausfall des Phasengebers |
JP3474810B2 (ja) | 1999-08-30 | 2003-12-08 | 三菱電機株式会社 | 内燃機関の燃焼状態検出装置 |
US6273064B1 (en) | 2000-01-13 | 2001-08-14 | Ford Global Technologies, Inc. | Controller and control method for an internal combustion engine using an engine-mounted accelerometer |
DE10021913A1 (de) | 2000-05-05 | 2001-11-08 | Bosch Gmbh Robert | Verfahren zur Fehlererkennung bei der Auswertung von Sensorsignalen |
DE10043498A1 (de) | 2000-09-01 | 2002-03-14 | Bosch Gmbh Robert | Verfahren zur klopferkennung bei Brennkraftmaschinen |
DE10043693A1 (de) | 2000-09-04 | 2002-03-14 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine und entsprechende Vorrichtung |
IL144010A (en) | 2001-06-26 | 2006-04-10 | Engines Pdm Ltd | Universal diagnostic method and system for engines |
US6598468B2 (en) | 2001-07-11 | 2003-07-29 | Cummins Inc. | Apparatus and methods for determining start of combustion for an internal combustion engine |
DE10201073A1 (de) | 2002-01-14 | 2003-07-31 | Siemens Ag | Verfahren zur Verarbeitung eines Sensorsignals eines Klopf-Sensors für eine Brennkraftmaschine |
CA2476375A1 (en) | 2002-02-15 | 2003-08-28 | Frank W. Popielas | Apparatus for measuring pressures in engine cylinders |
US7021128B2 (en) | 2002-04-29 | 2006-04-04 | Avl North America, Inc. | Misfire detection using acoustic sensors |
JP3975936B2 (ja) | 2003-02-17 | 2007-09-12 | 日産自動車株式会社 | ノッキング指標値算出装置 |
JP4134797B2 (ja) | 2003-04-14 | 2008-08-20 | 株式会社デンソー | ノッキング検出装置 |
FR2854693B1 (fr) | 2003-05-09 | 2005-07-01 | Siemens Vdo Automotive | Procede de determination de l'energie d'un signal de cliquetis pour moteur a combustion interne |
JP4165751B2 (ja) | 2003-07-03 | 2008-10-15 | 株式会社デンソー | 内燃機関のノック検出装置 |
US6885932B2 (en) | 2003-08-08 | 2005-04-26 | Motorola, Inc. | Misfire detection in an internal combustion engine |
CA2444163C (en) | 2003-10-01 | 2007-01-09 | Westport Research Inc. | Method and apparatus for controlling combustion quality of a gaseous-fuelled internal combustion engine |
DE10350180B4 (de) | 2003-10-28 | 2008-03-27 | Siemens Ag | Verfahren und Vorrichtung zur Analyse des Verbrennungsgeräusches bei der Kraftstoffeinspritzung in einen Zylinder einer Brennkraftmaschine |
JP4363171B2 (ja) | 2003-12-11 | 2009-11-11 | トヨタ自動車株式会社 | エンジンのノック制御装置 |
GB0401053D0 (en) | 2004-01-17 | 2004-02-18 | Qinetiq Ltd | Improvements in and relating to accelerometers |
EP1571331B1 (en) | 2004-02-20 | 2010-06-16 | Nissan Motor Co., Ltd. | Ignition timing control system for an internal combustion engine |
JP2005307759A (ja) | 2004-04-16 | 2005-11-04 | Toyota Industries Corp | 予混合圧縮自着火機関の運転方法及び予混合圧縮自着火機関 |
JP4281610B2 (ja) | 2004-04-27 | 2009-06-17 | 株式会社豊田自動織機 | 予混合圧縮自着火機関の運転方法及び予混合圧縮自着火機関 |
US7191658B2 (en) | 2004-06-11 | 2007-03-20 | Denso Corporation | Pressure-detecting device and method of manufacturing the same |
DE102004054711A1 (de) | 2004-11-12 | 2006-05-18 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
US7444231B2 (en) | 2004-11-18 | 2008-10-28 | Westport Power Inc. | Method of mounting an accelerometer on an internal combustion engine and increasing signal-to-noise ratio |
DE102004057261A1 (de) | 2004-11-26 | 2006-06-01 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine mit mehreren Zylindern |
JP4605642B2 (ja) | 2004-12-14 | 2011-01-05 | 株式会社デンソー | 内燃機関のノック判定装置 |
JP2006183548A (ja) | 2004-12-27 | 2006-07-13 | Nippon Soken Inc | 内燃機関の制御装置 |
EP1698775B1 (de) | 2005-03-03 | 2008-02-27 | Ford Global Technologies, LLC | Vorrichtung und Verfahren zur Regelung des Verbrennungsverhaltens einer Brennkraftmaschine |
JP4452660B2 (ja) | 2005-06-28 | 2010-04-21 | トヨタ自動車株式会社 | ノッキング状態判定装置 |
DE102005039757A1 (de) | 2005-08-23 | 2007-03-01 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
JP4756968B2 (ja) | 2005-09-16 | 2011-08-24 | 株式会社デンソー | 内燃機関のノック判定装置 |
JP4314240B2 (ja) | 2005-12-09 | 2009-08-12 | トヨタ自動車株式会社 | 内燃機関の点火時期制御装置 |
DE102005058820B4 (de) | 2005-12-09 | 2016-11-17 | Daimler Ag | Verfahren zur Regelung einer Brennkraftmaschine, insbesondere einer selbstzündenden Brennkraftmaschine |
US7383816B2 (en) | 2006-01-09 | 2008-06-10 | Dresser, Inc. | Virtual fuel quality sensor |
US7448254B2 (en) | 2006-02-14 | 2008-11-11 | Kulite Semiconductor Products, Inc. | Method and apparatus for measuring knocking in internal combustion engines |
FR2898411B1 (fr) | 2006-03-08 | 2008-05-16 | Inst Francais Du Petrole | Methode d'estimation en temps reel de parametres de combustion moteur a partir de signaux vibratoires |
JP2007270808A (ja) | 2006-03-31 | 2007-10-18 | Mazda Motor Corp | 多気筒4サイクルエンジンの制御装置 |
DE102006029279B3 (de) | 2006-06-26 | 2007-10-25 | Siemens Ag | Verfahren zur zylinderindividuellen Klopfregelung sowie zugehörige Vorrichtung |
US7546198B2 (en) | 2006-08-03 | 2009-06-09 | Spectral Dynamics, Inc. | Dynamic noise-reduction baselining for real-time spectral analysis of internal combustion engine knock |
US7810469B2 (en) | 2006-09-06 | 2010-10-12 | Ford Global Technologies, Llc | Combustion control based on a signal from an engine vibration sensor |
US7444236B2 (en) | 2006-09-26 | 2008-10-28 | Gm Global Technology Operations, Inc. | Discrete variable valve lift diagnostic control system |
EP1923556A1 (en) | 2006-11-14 | 2008-05-21 | Delphi Technologies, Inc. | Improvements to engine control system |
US7571640B2 (en) | 2007-03-28 | 2009-08-11 | Cummins, Inc. | Misfire detection in engines for on-board-diagnostics |
EP1988378A1 (en) | 2007-05-02 | 2008-11-05 | Ford Global Technologies, LLC | On-Cylinder Combustion Sensor |
JP4367529B2 (ja) | 2007-05-29 | 2009-11-18 | トヨタ自動車株式会社 | 内燃機関の点火時期制御装置 |
EP2036746B1 (en) | 2007-09-17 | 2014-07-23 | S & T Daewoo Co., Ltd. | Sensor module comprising acceleration sensor and relative displacement sensor, damper and electronically controllable suspension system comprising the same, and method of controlling vehicle movement using the same |
FR2924219B1 (fr) | 2007-11-22 | 2009-12-25 | Siemens Vdo Automotive | Procede de determination d'une valeur representative de la pression dans une chambre de combustion d'un moteur a combustion interne. |
CA2609718C (en) | 2007-11-27 | 2010-03-23 | Westport Power Inc. | Method and apparatus for determining a normal combustion characteristic for an internal combustion engine from an accelerometer signal |
CA2610388C (en) | 2007-11-29 | 2009-09-15 | Westport Power Inc. | Method and apparatus for using an accelerometer signal to detect misfiring in an internal combustion engine |
JP4785204B2 (ja) | 2007-12-17 | 2011-10-05 | 本田技研工業株式会社 | エンジン点火制御装置 |
DE102008011614B4 (de) | 2008-02-28 | 2011-06-01 | Continental Automotive Gmbh | Vorrichtung zur Verarbeitung eines Klopfsensorsignals |
DE102008001081B4 (de) | 2008-04-09 | 2021-11-04 | Robert Bosch Gmbh | Verfahren und Motorsteuergerät zum Steuern eines Verbrennungsmotors |
FR2931882A1 (fr) | 2008-05-29 | 2009-12-04 | Peugeot Citroen Automobiles Sa | Methode de detection du cliquetis dans un moteur a allumage commande |
FR2931881A1 (fr) | 2008-05-29 | 2009-12-04 | Peugeot Citroen Automobiles Sa | Methode de detection du cliquetis dans un moteur a allumage commande |
GB0816721D0 (en) | 2008-09-13 | 2008-10-22 | Daniel Simon R | Systems,devices and methods for electricity provision,usage monitoring,analysis and enabling improvements in efficiency |
FR2936019B1 (fr) | 2008-09-18 | 2010-09-10 | Inst Francais Du Petrole | Procede de detection de combustion anormale pour moteurs a combustion interne |
FR2937086B1 (fr) | 2008-10-09 | 2013-05-24 | Inst Francais Du Petrole | Procede de detection de combustion anormale pour moteurs a combustion interne |
JP5023039B2 (ja) | 2008-10-30 | 2012-09-12 | 日立オートモティブシステムズ株式会社 | 筒内圧測定装置 |
CN102171434B (zh) | 2008-11-19 | 2012-10-17 | 丰田自动车株式会社 | 汽缸内压力传感器异常检测装置、汽缸内压力传感器异常检测方法、内燃机控制装置 |
DE112008004013A5 (de) * | 2008-11-27 | 2011-06-30 | FEV Motorentechnik GmbH, 52078 | Verfahren zur Erkennung von Verbrennungsaussetzern in einer Verbrennungskraftmaschine, Steuergerät für eine Verbrennungskraftmaschine und Verbrennungskraftmaschine |
EP2433355B2 (en) | 2009-05-20 | 2017-10-04 | Cummins Power Generation IP, Inc. | Apparatus, systems, and methods to address electrical load transients, electrical faults, and electric power grid disruptions |
CA2673216C (en) | 2009-07-31 | 2011-05-03 | Westport Power Inc. | Method and apparatus for reconstructing in-cylinder pressure and correcting for signal decay |
GB2473438B (en) | 2009-09-09 | 2013-07-31 | Gm Global Tech Operations Inc | Method and device for closed-loop combustion control for an internal combustion engine |
DK2312744T3 (da) | 2009-10-13 | 2012-10-01 | Converteam Technology Ltd | Effektfordelingssystemer |
JP5334791B2 (ja) | 2009-10-19 | 2013-11-06 | 三菱電機株式会社 | 内燃機関の制御装置 |
FR2952679B1 (fr) | 2009-11-13 | 2012-02-24 | Inst Francais Du Petrole | Procede de detection de combustion anormale pour moteurs a combustion interne a partir de modelisations de distributions d'indicateurs de combustion |
FR2952678B1 (fr) | 2009-11-13 | 2012-07-13 | Inst Francais Du Petrole | Procede de detection de combustion anormale pour moteurs a combustion interne a partir de plusieurs indicateurs de la combustion |
DE102011012722B4 (de) | 2010-03-31 | 2019-09-12 | Mazda Motor Corp. | Verfahren zur Detektion anomaler Verbrennung für einen Fremdzündungsmotor und Fremdzündungsmotor |
US8463533B2 (en) | 2010-08-05 | 2013-06-11 | Ford Global Technologies, Llc | Method and system for pre-ignition control |
US8245692B2 (en) | 2010-12-03 | 2012-08-21 | Ford Global Technologies, Llc | Method and system for pre-ignition control |
EP2500705A1 (en) | 2011-03-15 | 2012-09-19 | Wärtsilä Schweiz AG | Method for the determination of the pressure in the combustion chamber of a large diesel engine and large diesel engine |
US8538666B2 (en) | 2011-06-13 | 2013-09-17 | GM Global Technology Operations LLC | CPS knock detection system |
JP5554295B2 (ja) | 2011-07-28 | 2014-07-23 | 日立オートモティブシステムズ株式会社 | 内燃機関の燃焼騒音検出方法及び燃焼騒音検出装置並びに内燃機関の制御装置 |
FI123044B (fi) | 2011-08-25 | 2012-10-15 | Waertsilae Finland Oy | Menetelmä ja järjestely sytytyskatkon ohjaamiseksi |
WO2013118151A2 (en) | 2012-02-09 | 2013-08-15 | Sedemac Mechatronics Pvt Ltd | A system and method for controlling the ignition timing of an internal combustion engine |
CN203480037U (zh) | 2013-10-10 | 2014-03-12 | 国家电网公司 | 铁塔螺栓松动的快速检测用振动频率接收装置 |
-
2015
- 2015-03-11 US US14/644,526 patent/US9695761B2/en active Active
-
2016
- 2016-02-19 AU AU2016201059A patent/AU2016201059A1/en not_active Abandoned
- 2016-02-25 CA CA2921934A patent/CA2921934C/en active Active
- 2016-02-26 BR BR102016004249-6A patent/BR102016004249B1/pt active IP Right Grant
- 2016-03-04 JP JP2016041659A patent/JP6672018B2/ja active Active
- 2016-03-07 KR KR1020160026994A patent/KR102258943B1/ko active IP Right Grant
- 2016-03-08 EP EP16159267.0A patent/EP3067538B1/en active Active
- 2016-03-11 CN CN201610138320.2A patent/CN105971730B/zh active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4364260A (en) * | 1981-03-16 | 1982-12-21 | General Motors Corporation | Engine with knock sensing apparatus having multiple frequency tuning |
US5400644A (en) * | 1992-09-29 | 1995-03-28 | Motorola, Inc. | Knock detection system |
JP2002155795A (ja) * | 2000-11-21 | 2002-05-31 | Yamaha Motor Co Ltd | 多気筒エンジンのノッキング判別装置 |
JP2007009735A (ja) * | 2005-06-28 | 2007-01-18 | Toyota Motor Corp | 内燃機関の点火時期制御装置 |
JP2007231903A (ja) * | 2006-03-03 | 2007-09-13 | Yanmar Co Ltd | 内燃機関のノッキング判定装置 |
JP2009209751A (ja) * | 2008-03-04 | 2009-09-17 | Denso Corp | 内燃機関のノック検出装置 |
JP2011132814A (ja) * | 2009-12-22 | 2011-07-07 | Nissan Motor Co Ltd | 内燃機関のノック判定装置 |
JP2011236783A (ja) * | 2010-05-07 | 2011-11-24 | Toyota Motor Corp | 内燃機関の冷却装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019044584A (ja) * | 2017-08-29 | 2019-03-22 | トヨタ自動車株式会社 | ノッキング判定装置 |
Also Published As
Publication number | Publication date |
---|---|
EP3067538B1 (en) | 2020-05-27 |
BR102016004249B1 (pt) | 2022-10-18 |
CN105971730A (zh) | 2016-09-28 |
CA2921934C (en) | 2022-11-15 |
KR102258943B1 (ko) | 2021-06-03 |
AU2016201059A1 (en) | 2016-09-29 |
BR102016004249A2 (pt) | 2016-09-13 |
US9695761B2 (en) | 2017-07-04 |
KR20160110145A (ko) | 2016-09-21 |
US20160265454A1 (en) | 2016-09-15 |
EP3067538A1 (en) | 2016-09-14 |
CA2921934A1 (en) | 2016-09-11 |
CN105971730B (zh) | 2019-12-17 |
JP6672018B2 (ja) | 2020-03-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6672018B2 (ja) | ピストンスラップからエンジンノックを識別するシステム及び方法 | |
CA2919241C (en) | Methods and systems to derive engine component health using total harmonic distortion in a knock sensor signal | |
JP2016153646A (ja) | ノックセンサを用いたノッキング状態の信号記録 | |
US20170175661A1 (en) | Real time detection and diagnosis of change in peak firing pressure | |
EP3086106A1 (en) | Knock sensor systems and methods for detection of component conditions | |
CA2919242C (en) | Methods and systems to derive knock sensor conditions | |
EP3067682A1 (en) | Joint time-frequency and wavelet analysis of knock sensor signal | |
JP2016128689A (ja) | エンジン特性を決定するためのセンサ | |
KR102245700B1 (ko) | 정점 연소 압력의 위치를 결정하는 방법 및 시스템 | |
CA2951796A1 (en) | System and method to verify installation of asymmetric piston |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20190227 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20191112 |
|
A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20191205 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20191224 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20200205 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20200212 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20200303 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20200304 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6672018 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |