WO2019044329A1 - Diagnosis device and diagnosis method - Google Patents
Diagnosis device and diagnosis method Download PDFInfo
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- WO2019044329A1 WO2019044329A1 PCT/JP2018/028556 JP2018028556W WO2019044329A1 WO 2019044329 A1 WO2019044329 A1 WO 2019044329A1 JP 2018028556 W JP2018028556 W JP 2018028556W WO 2019044329 A1 WO2019044329 A1 WO 2019044329A1
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- sound
- release bearing
- time
- peak value
- pressure level
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
- F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
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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
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
Definitions
- the present disclosure relates to a diagnostic device and a diagnostic method, and more particularly to failure diagnosis of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission.
- Patent Documents 1 and 2 Conventionally, various techniques have been proposed to appropriately notify the driver that the parts need to be replaced if the possibility of breakage or the like is generated by predicting the life of various parts mounted on a vehicle. (See, for example, Patent Documents 1 and 2).
- a release bearing is interposed between the diaphragm spring and the release fork so as to make them relatively rotatable.
- a release bearing When such a release bearing is gradually deteriorated or damaged, it generates an abnormal noise having a peak value in the sound pressure level in a specific frequency range, that is, an operating noise having a characteristic different from that of a normal release bearing. It will be.
- This abnormal noise is a precursor to the failure of the release bearing, and if the vehicle continues to travel in such a state, the release bearing may cause seizing due to thermal deterioration of the grease and the like, leading to failure.
- the release bearing since the release bearing is covered by the clutch housing, it is difficult for the driver in the vehicle compartment to detect abnormal noise, and it is impossible for the driver to detect in advance hearing failure of the release bearing. There is a problem such as
- the degree of deterioration of the release bearing changes in accordance with the driver of the vehicle and the driving situation (such as the driving frequency and the size of the load). For this reason, the failure occurrence time of the release bearing is also different for each vehicle depending on the driver of the vehicle and the driving situation, and it is difficult to uniformly set an appropriate parts replacement time based on the traveling distance and the traveling time There is also a problem such as
- the technique of the present disclosure aims to effectively predict the occurrence of a failure of a release bearing.
- the device of the present disclosure is a diagnostic device of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission, and a sound collecting device acquires an actual operating sound of the release bearing.
- failure diagnosis means for predicting the occurrence of a failure of the release bearing based on the actual operation sound acquired by the sound collection means and the reference operation sound of the release bearing of the failed product acquired in advance. It is characterized by
- the failure diagnosis means may travel until the failure occurs in the release bearing based on the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound.
- the possible distance or the possible travel time may be estimated, and it may be determined that the release bearing may have a failure possibility when the possible travel distance or the possible travel time is less than a predetermined threshold.
- the failure diagnosis means determines a difference between the peak value of the sound pressure level of the actual operation sound collected this time and the peak value of the sound pressure level of the actual operation sound collected last time By dividing by the traveling distance or period traveling time obtained by subtracting the traveling distance or traveling time at the previous sound collection from the traveling time, the rate of change of the actual operating sound from the previous sound collection to the current sound collection.
- the travelable distance or the travel can be calculated by dividing the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound collected this time by the change rate The possible time may be calculated.
- the sound collecting means may be a unidirectional, sharp directional or superdirective microphone, and the microphone may be fixed to the front wall of the transmission.
- the information processing apparatus may further include notification means for notifying the driver of the information when it is determined by the failure diagnosis means that there is a possibility of occurrence of a failure in the release bearing.
- a method of the present disclosure is a diagnostic method of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission, and acquiring an actual operation noise of the release bearing. It is characterized in that the occurrence of a failure of the release bearing is predicted based on the actual operation noise and a reference operation noise of a release bearing of a failed product obtained in advance.
- the diagnostic method can travel until the failure occurs in the release bearing based on the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound. Calculating the distance or the travelable time, and determining whether the travelable distance or the travelable time is less than or equal to a predetermined threshold, the travelable distance or the travelable time It may be determined that the release bearing has a possibility of occurrence of failure when it is determined that the value is equal to or less than a predetermined threshold value.
- the difference between the peak value of the sound pressure level of the actual operation sound collected this time and the peak value of the sound pressure level of the actual operation sound collected last time is the traveling distance or traveling at the time of current collection. Calculate the rate of change of the actual operation sound from the previous sound collection to the current sound collection by dividing it by the period travel distance or period travel time obtained by subtracting the travel distance or travel time at the previous sound collection from time. In the step of calculating the travelable distance or the travelable time, the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound collected this time is The travelable distance or the travelable time may be calculated by dividing by the change rate.
- FIG. 1 is a schematic overall configuration diagram of a vehicle equipped with a diagnostic device according to an embodiment of the present disclosure.
- FIG. 2 is a schematic functional block diagram showing a diagnostic device according to an embodiment of the present disclosure.
- FIG. 3 is a schematic view showing an example of an operation sound map according to an embodiment of the present disclosure.
- FIG. 4 is a flowchart illustrating a diagnosis process according to an embodiment of the present disclosure.
- FIG. 1 is a schematic overall configuration diagram of a vehicle 1 equipped with a diagnostic device according to the present embodiment.
- An input shaft 42 of a transmission 40 is connected to a crankshaft 11 of the engine 10 via a clutch device 20 so as to be able to be connected and disconnected.
- the transmission case 41 of the transmission 40 includes a substantially cylindrical side wall case portion 41A, a front cover portion (an example of a front wall portion) 41B covering the front end opening of the side wall case portion 41A, and a rear end of the side wall case portion 41A. And a rear cover portion 41C covering the opening.
- An input shaft 42 is rotatably supported by the front cover portion 41B via a bearing (not shown).
- An output shaft 43 is rotatably supported by a rear cover portion 41C via a bearing (not shown).
- a countershaft 44 disposed in parallel with the input shaft 42 and the output shaft 43 is rotatably supported by the front and rear cover portions 41B and 41C via bearings (not shown).
- a plurality of transmission gear trains 45, a synchronization mechanism (not shown) and the like are arranged on each of these shafts 42 to 44. Further, left and right driving wheels are connected to the output shaft 43 via a propeller shaft 47, a differential device (not shown), and left and right driving shafts.
- the clutch device 20 is, for example, a dry single-plate clutch device, and the output side end of the crankshaft 11 and the input side end of the input shaft 42 are disposed in the clutch housing 21.
- a clutch disc 22 is provided movably in the axial direction.
- the clutch disc 22 is provided with a damper spring (not shown) and a clutch facing 23.
- the flywheel 12 is fixed to the output end of the crankshaft 11, and a clutch cover 24 is provided on the rear side surface of the flywheel 12.
- a pressure plate 25 and a diaphragm spring 26 are disposed between the flywheel 12 and the clutch cover 24.
- the release fork 28 is provided swingably around the fulcrum 19.
- the release fork 28 has one end side housed in the clutch housing 21 and the other end side protruding outside the clutch housing 21.
- the release bearing 27 is provided between the inner peripheral edge of the diaphragm spring 26 and one end of the release fork 28 to allow the diaphragm spring 26 and the release fork 28 to rotate relative to each other. More specifically, the release bearing 27 includes an inner ring (rotating ring) A with which the inner peripheral edge of the diaphragm spring 26 contacts, an outer ring (non-rotating ring) C to which one end of the release fork 28 is connected, and the inner ring A and the outer ring And a sphere B rotatably disposed between C.
- the release bearing 27 is moved to the output side (right direction in the figure) by the elastic force of the diaphragm spring 26 at the time of contact operation when the clutch device 20 switches from disconnection to contact, and at the time of disconnection operation when the clutch device 20 switches from connection to disconnection. It is pushed by the release fork 28 and moved to the input side (left direction in the drawing).
- a release cylinder 30 is provided outside the clutch housing 21.
- the release cylinder 30 is movably accommodated inside the cylinder body 31 and has a piston 32 defining an oil pressure chamber, a proximal end fixed to the piston 32, and a push whose distal end abuts against the release fork 28 A rod 33 and a spring 34 provided in the cylinder body 31 to hold the push rod 33 between the piston 32 and the release fork 28 are provided.
- the release cylinder 30 is connected to the master cylinder 60 via a pipe 35.
- the master cylinder 60 has a reserve tank 61 for storing hydraulic oil, a piston 63 movably accommodated in the cylinder body 62 to define an oil pressure chamber, a proximal end fixed to the piston 63, and a distal end And a clutch pedal 70, and a return spring 65 provided in the hydraulic pressure chamber for biasing the piston 63. Further, the master cylinder 60 is provided with a stroke sensor 56 that detects the stroke amount (clutch engagement / disengagement) of the rod 64. A sensor value of the stroke sensor 56 is input to an electrically connected electronic control unit (hereinafter, ECU) 100.
- ECU electronice control unit
- a microphone 80 as a sound collector (sound collection unit) for acquiring the operation sound of the release bearing 27 is provided.
- the microphone 80 is, for example, a microphone with single directivity, sharp directivity, super directivity or the like that can easily capture sound incident from a specific direction, and can effectively collect the operation sound of the release bearing 27 In the direction of the release bearing 27.
- the microphone 80 is preferably fixed to the front cover portion 41 B of the transmission case 41 where the strength is most easily secured around the release bearing 27 so as not to be affected by disturbances such as vibration.
- the operation noise of the release bearing 27 collected by the microphone 80 is input to the electrically connected ECU 100.
- the ECU 100 performs various controls of the vehicle 1 and includes a known CPU, ROM, RAM, input port, output port, and the like. Further, as shown in FIG. 2, the ECU 100 has an operating sound change rate calculation unit 110, a remaining life calculation unit 120, and a failure diagnosis unit 130 as a part of functional elements. Although each of these functional elements is described as being included in the ECU 100 which is an integral hardware, any part of these may be provided in a separate hardware.
- the operation sound change rate calculation unit 110 calculates a change rate S% of the sound pressure level of the operation sound emitted from the release bearing 27. More specifically, the memory of the ECU 100 stores an operation sound map M (see FIG. 3) that defines the relationship between the frequency (kHz) of the operation sound of the release bearing 27 and the sound pressure level (dB). . In the operating sound map M, a faulty product operating sound line L F having a peak value P Max at the sound pressure level in a specific frequency region is set.
- the defective product operation sound line L F is a value obtained by collecting the operation sound (an example of the reference operation sound) of the release bearing 27 of the defective product in advance by experiment or the like.
- a sound or an operation sound emitted from the release bearing 27 of the defective product when the engine speed is increased with the clutch device 20 disconnected may be acquired by the microphone inserted in the clutch housing 21.
- the operating sound map M does not necessarily have to be stored graphically and may be stored as numerical data.
- Operation sound change rate arithmetic unit 110 first peak value difference between the peak value P N of the sound pressure level of the current collected by the operation sound, the peak value P N-1 of the sound pressure level of the operation sound of the previously collected Calculate ⁇ P N. Then, the operation sound change rate arithmetic unit 110 calculates the period travel distance [Delta] D N from the difference between the travel distance D N-1 and the travel distance D N of the current time of pickup of the previous pickup. Then, the operating sound change rate calculation unit 110 divides the peak value difference ⁇ P N by the period travel distance ⁇ D N to obtain the peak value P of the current sound pressure level with respect to the previous peak value P N ⁇ 1 of the sound pressure level.
- the calculation of the change rate S% N is not limited to the traveling distance, and may be performed based on the traveling time.
- the failure diagnosis unit 130 Based on the latest travelable distance D RN calculated by the remaining life calculation unit 120, the failure diagnosis unit 130 carries out a failure diagnosis to determine whether or not there is a possibility of the occurrence of a failure in the release bearing 27. More specifically, when the latest remaining travelable distance D RN becomes equal to or less than a predetermined threshold distance D Min , the failure diagnosis unit 130 determines that the release bearing 27 may have a failure.
- the threshold distance D Min is preferably set, for example, by securing a sufficient distance by which the vehicle 1 can reach the maintenance factory or the like by self-travel in order to replace the release bearing 27.
- the display 90 in the driver's cab indicates that the release bearing 27 needs to be replaced and / or the travelable distance D RN .
- An instruction signal to be displayed is output.
- reporting is not limited to the display to the indicator 90, You may carry out by the audio
- the peak value P N of the sound pressure level of the current collected by the operation sound of the sound pressure level of the operation sound of the previously collected the peak value difference [Delta] P N of the peak value P N-1, the last collected Period of change in sound pressure level S% N ( (P N) by dividing by the period travel distance ⁇ D N which is the difference between the travel distance D N -1 at the time and the travel distance D N at the current sound collection. -P N-1 ) / (D N -D N -1 )) is calculated.
- step S120 it is determined whether the travelable distance D RN is less than or equal to a predetermined threshold distance D Min . If the travelable distance D RN is equal to or less than the predetermined threshold distance D Min (positive), it is determined that the release bearing 27 has a possibility of occurrence of a failure, and the process proceeds to step S130 and the display 90 is replaced with the release bearing 27 And / or a notification to display the travelable distance D RN is performed.
- step S120 determines whether the drivable distance D RN is longer than the predetermined threshold distance D Min (negative). If it is determined in step S120 that the drivable distance D RN is longer than the predetermined threshold distance D Min (negative), the control is returned to step S100, and the drivable distance D RN is less than the predetermined threshold distance D Min .
- the processes of steps S100 to S120 are repeatedly executed until
- the operation sound of the release bearing 27 which is hard to detect by the driver in the vehicle compartment is collected by the microphone 80, and the sound pressure of the operation sound
- the travelable distance until the failure occurs in the release bearing 27 is estimated and calculated.
- the release bearing 27 which changes according to the driver and the driving situation (the driving frequency, the magnitude of the load, etc.) by calculating the travelable distance based on the change rate of the most recent operating noise.
- the remaining life can be predicted with high accuracy, and it becomes possible to effectively grasp the occurrence of a failure of the different release bearing 27 for each vehicle or driver.
- the travelable distance until the failure of the release bearing 27 occurs is calculated, but the deterioration degree of the release bearing 27 is estimated from the rate of change of the operating noise of the release bearing 27 You may configure it.
- clutch device 20 is not limited to the manual clutch device of the illustrated example, and any clutch device including the release bearing 27 can be widely applied to other clutch devices such as an automatic clutch device.
- vehicle 1 is not limited to one including the engine 10 as a drive source, and may be a hybrid vehicle or the like including a traveling motor.
- the present invention has the effect of being able to effectively predict the occurrence of a failure of a release bearing, and is useful for a diagnostic device, a diagnostic method and the like.
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- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A diagnosis device for a release bearing 27 of a clutch device 20 that is capable of cutting off the power transmitted from a drive source 10 installed in a vehicle 1 to a transmission 40, said diagnosis device comprising a microphone 80 for acquiring the actual operating sound of the release bearing 27 and a failure diagnosis unit 100 for predicting the failure of the release bearing 27 on the basis of the actual operating sound acquired by the microphone 80 and a reference operating sound that is from a failed release bearing and has been acquired beforehand.
Description
本開示は、診断装置及び診断方法に関し、特に、車両に搭載された駆動源から変速機に伝達される動力を断接可能なクラッチ装置のレリーズベアリングの故障診断に関する。
The present disclosure relates to a diagnostic device and a diagnostic method, and more particularly to failure diagnosis of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission.
従来、車両に搭載された各種部品類の寿命を予測し、部品に破損等の可能性が生じた場合には、当該部品の交換が必要な旨を運転者に適宜知らせる技術が種々提案されている(例えば、特許文献1,2等参照)。
Conventionally, various techniques have been proposed to appropriately notify the driver that the parts need to be replaced if the possibility of breakage or the like is generated by predicting the life of various parts mounted on a vehicle. (See, for example, Patent Documents 1 and 2).
ところで、一般的なクラッチ装置においては、ダイヤフラムスプリングとレリーズフォークとの間に、これらを相対回転可能にするレリーズベアリングが介装されている。このようなレリーズベアリングが徐々に劣化或は損傷すると、特定の周波数域にて音圧レベルにピーク値を有する異音、すなわち、正常なレリーズベアリングの動作音とは異なる特性を有する動作音を生じるようになる。
By the way, in a general clutch device, a release bearing is interposed between the diaphragm spring and the release fork so as to make them relatively rotatable. When such a release bearing is gradually deteriorated or damaged, it generates an abnormal noise having a peak value in the sound pressure level in a specific frequency range, that is, an operating noise having a characteristic different from that of a normal release bearing. It will be.
この異音は、レリーズベアリングの故障の前兆であり、このような状態で車両の走行を継続させると、レリーズベアリングがグリースの熱劣化による焼付き等を引き起こし故障に至る虞がある。特に、レリーズベアリングは、クラッチハウジングによって覆われているため、車室内の運転者が異音を感知することは難しく、レリーズベアリングの故障を運転者が聴覚によって事前に察知することは不可能であるといった課題がある。
This abnormal noise is a precursor to the failure of the release bearing, and if the vehicle continues to travel in such a state, the release bearing may cause seizing due to thermal deterioration of the grease and the like, leading to failure. In particular, since the release bearing is covered by the clutch housing, it is difficult for the driver in the vehicle compartment to detect abnormal noise, and it is impossible for the driver to detect in advance hearing failure of the release bearing. There is a problem such as
また、レリーズベアリングの劣化進行度合いは、車両の運転者や運転状況(運転頻度や負荷の大きさ等)に応じて変化する。このため、レリーズベアリングの故障発生時期も車両の運転者や運転状況に応じて車両毎に様々であり、適切な部品交換時期を走行距離や走行時間に基づいて一律に設定することは困難であるといった課題もある。
Further, the degree of deterioration of the release bearing changes in accordance with the driver of the vehicle and the driving situation (such as the driving frequency and the size of the load). For this reason, the failure occurrence time of the release bearing is also different for each vehicle depending on the driver of the vehicle and the driving situation, and it is difficult to uniformly set an appropriate parts replacement time based on the traveling distance and the traveling time There is also a problem such as
レリーズベアリングが故障すると、駆動源から変速機に動力を伝達することができなくなり、車両が路上で走行不能に陥ってしまうため、故障発生時期を効果的に予測して運転者に適宜知らせることにより、車両の路上故障を未然に防ぐことが望まれる。
If the release bearing fails, power can not be transmitted from the drive source to the transmission, and the vehicle can not run on the road. Therefore, by effectively predicting the failure occurrence time and notifying the driver appropriately It is desirable to prevent the road breakdown of the vehicle in advance.
本開示の技術は、レリーズベアリングの故障発生を効果的に予測することを目的とする。
The technique of the present disclosure aims to effectively predict the occurrence of a failure of a release bearing.
本開示の装置は、車両に搭載された駆動源から変速機に伝達される動力を断接可能なクラッチ装置のレリーズベアリングの診断装置であって、前記レリーズベアリングの実動作音を取得する集音手段と、前記集音手段により取得される実動作音と、予め取得した故障品のレリーズベアリングの基準動作音とに基づいて、前記レリーズベアリングの故障発生を予測する故障診断手段と、を備えることを特徴とする。
The device of the present disclosure is a diagnostic device of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission, and a sound collecting device acquires an actual operating sound of the release bearing. And failure diagnosis means for predicting the occurrence of a failure of the release bearing based on the actual operation sound acquired by the sound collection means and the reference operation sound of the release bearing of the failed product acquired in advance. It is characterized by
また、前記故障診断手段は、前記基準動作音の音圧レベルのピーク値と、前記実動作音の音圧レベルのピーク値との差に基づいて、前記レリーズベアリングに故障が発生するまでの走行可能距離又は走行可能時間を推定すると共に、当該走行可能距離又は当該走行可能時間が所定の閾値以下になると、前記レリーズベアリングに故障発生の可能性があると判定してもよい。
In addition, the failure diagnosis means may travel until the failure occurs in the release bearing based on the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound. The possible distance or the possible travel time may be estimated, and it may be determined that the release bearing may have a failure possibility when the possible travel distance or the possible travel time is less than a predetermined threshold.
また、前記故障診断手段は、今回集音した実動作音の音圧レベルのピーク値と前回集音した実動作音の音圧レベルのピーク値との差を、今回集音時の走行距離又は走行時間から前回集音時の走行距離又は走行時間を減算して得た期間走行距離又は期間走行時間で除算することにより、前回集音時から今回集音時までの実動作音の変化率を演算すると共に、前記基準動作音の音圧レベルのピーク値と今回集音した実動作音の音圧レベルのピーク値との差を前記変化率で除算することにより、前記走行可能距離又は前記走行可能時間を演算してもよい。
Further, the failure diagnosis means determines a difference between the peak value of the sound pressure level of the actual operation sound collected this time and the peak value of the sound pressure level of the actual operation sound collected last time By dividing by the traveling distance or period traveling time obtained by subtracting the traveling distance or traveling time at the previous sound collection from the traveling time, the rate of change of the actual operating sound from the previous sound collection to the current sound collection The travelable distance or the travel can be calculated by dividing the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound collected this time by the change rate The possible time may be calculated.
また、前記集音手段が、単一指向性、鋭指向性又は、超指向性のマイクロホンであり、当該マイクロホンが前記変速機の前壁部に固定されてもよい。
The sound collecting means may be a unidirectional, sharp directional or superdirective microphone, and the microphone may be fixed to the front wall of the transmission.
また、前記故障診断手段により前記レリーズベアリングに故障発生の可能性があると判定されると、当該情報を運転者に知らせる報知手段をさらに備えてもよい。
The information processing apparatus may further include notification means for notifying the driver of the information when it is determined by the failure diagnosis means that there is a possibility of occurrence of a failure in the release bearing.
本開示の方法は、車両に搭載された駆動源から変速機に伝達される動力を断接可能なクラッチ装置のレリーズベアリングの診断方法であって、前記レリーズベアリングの実動作音を取得すると共に、該実動作音と、予め取得した故障品のレリーズベアリングの基準動作音とに基づいて、前記レリーズベアリングの故障発生を予測することを特徴とする。
A method of the present disclosure is a diagnostic method of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission, and acquiring an actual operation noise of the release bearing. It is characterized in that the occurrence of a failure of the release bearing is predicted based on the actual operation noise and a reference operation noise of a release bearing of a failed product obtained in advance.
また、前記診断方法は、前記基準動作音の音圧レベルのピーク値と、前記実動作音の音圧レベルのピーク値との差に基づいて、前記レリーズベアリングに故障が発生するまでの走行可能距離又は走行可能時間を演算するステップと、当該走行可能距離又は当該走行可能時間が所定の閾値以下であるか否かを判定するステップと、を含み、前記走行可能距離又は前記走行可能時間が前記所定の閾値以下であると判定した場合に、前記レリーズベアリングに故障発生の可能性があると判定してもよい。
Further, the diagnostic method can travel until the failure occurs in the release bearing based on the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound. Calculating the distance or the travelable time, and determining whether the travelable distance or the travelable time is less than or equal to a predetermined threshold, the travelable distance or the travelable time It may be determined that the release bearing has a possibility of occurrence of failure when it is determined that the value is equal to or less than a predetermined threshold value.
また、前記診断方法は、今回集音した実動作音の音圧レベルのピーク値と前回集音した実動作音の音圧レベルのピーク値との差を、今回集音時の走行距離又は走行時間から前回集音時の走行距離又は走行時間を減算して得た期間走行距離又は期間走行時間で除算することにより、前回集音時から今回集音時までの実動作音の変化率を演算するステップをさらに含み、前記走行可能距離又は走行可能時間を演算するステップでは、前記基準動作音の音圧レベルのピーク値と今回集音した実動作音の音圧レベルのピーク値との差を前記変化率で除算することにより、前記走行可能距離又は前記走行可能時間を演算してもよい。
In the diagnostic method, the difference between the peak value of the sound pressure level of the actual operation sound collected this time and the peak value of the sound pressure level of the actual operation sound collected last time is the traveling distance or traveling at the time of current collection. Calculate the rate of change of the actual operation sound from the previous sound collection to the current sound collection by dividing it by the period travel distance or period travel time obtained by subtracting the travel distance or travel time at the previous sound collection from time. In the step of calculating the travelable distance or the travelable time, the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound collected this time is The travelable distance or the travelable time may be calculated by dividing by the change rate.
本開示の技術によれば、レリーズベアリングの故障発生を効果的に予測することができる。
According to the technology of the present disclosure, it is possible to effectively predict the occurrence of failure of the release bearing.
以下、添付図面に基づいて、本開示の一実施形態に係る診断装置及び診断方法について説明する。同一の部品には同一の符号を付してあり、それらの名称および機能も同じである。したがって、それらについての詳細な説明は繰返さない。
Hereinafter, a diagnostic device and a diagnostic method according to an embodiment of the present disclosure will be described based on the attached drawings. The same parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description about them will not be repeated.
図1は、本実施形態に係る診断装置を搭載した車両1の模式的な全体構成図である。エンジン10のクランクシャフト11には、クラッチ装置20を介して変速機40のインプットシャフト42が断接可能に接続されている。
FIG. 1 is a schematic overall configuration diagram of a vehicle 1 equipped with a diagnostic device according to the present embodiment. An input shaft 42 of a transmission 40 is connected to a crankshaft 11 of the engine 10 via a clutch device 20 so as to be able to be connected and disconnected.
変速機40の変速機ケース41は、略筒状体の側壁ケース部41Aと、側壁ケース部41Aの前端開口を覆うフロントカバー部(前壁部の一例)41Bと、側壁ケース部41Aの後端開口を覆うリアカバー部41Cとを備えている。フロントカバー部41Bには、インプットシャフト42が図示しないベアリングを介して回転可能に軸支されている。リアカバー部41Cには、アウトプットシャフト43が図示しないベアリングを介して回転可能に軸支されている。また、前後の各カバー部41B,Cには、インプットシャフト42及びアウトプットシャフト43と平行に配置されたカウンタシャフト44が図示しないベアリングを介して回転可能に軸支されている。これら各シャフト42~44には、複数の変速ギヤ列45及び、図示しないシンクロ機構等が配置されている。さらに、アウトプットシャフト43には、プロペラシャフト47、何れも図示しない差動装置、左右の駆動軸等を介して左右の駆動輪が接続されている。
The transmission case 41 of the transmission 40 includes a substantially cylindrical side wall case portion 41A, a front cover portion (an example of a front wall portion) 41B covering the front end opening of the side wall case portion 41A, and a rear end of the side wall case portion 41A. And a rear cover portion 41C covering the opening. An input shaft 42 is rotatably supported by the front cover portion 41B via a bearing (not shown). An output shaft 43 is rotatably supported by a rear cover portion 41C via a bearing (not shown). Further, a countershaft 44 disposed in parallel with the input shaft 42 and the output shaft 43 is rotatably supported by the front and rear cover portions 41B and 41C via bearings (not shown). On each of these shafts 42 to 44, a plurality of transmission gear trains 45, a synchronization mechanism (not shown) and the like are arranged. Further, left and right driving wheels are connected to the output shaft 43 via a propeller shaft 47, a differential device (not shown), and left and right driving shafts.
クラッチ装置20は、例えば、乾式・単板式のクラッチ装置であって、クラッチハウジング21内には、クランクシャフト11の出力側端及び、インプットシャフト42の入力側端が配置されている。
The clutch device 20 is, for example, a dry single-plate clutch device, and the output side end of the crankshaft 11 and the input side end of the input shaft 42 are disposed in the clutch housing 21.
インプットシャフト42の入力端には、クラッチディスク22が軸方向に移動可能に設けられている。クラッチディスク22は、図示しないダンパースプリングと、クラッチフェーシング23とを備えている。
At the input end of the input shaft 42, a clutch disc 22 is provided movably in the axial direction. The clutch disc 22 is provided with a damper spring (not shown) and a clutch facing 23.
クランクシャフト11の出力端には、フライホイール12が固定され、フライホイール12の後側面には、クラッチカバー24が設けられている。これらフライホイール12とクラッチカバー24との間には、プレッシャープレート25及び、ダイヤフラムスプリング26が配置されている。
The flywheel 12 is fixed to the output end of the crankshaft 11, and a clutch cover 24 is provided on the rear side surface of the flywheel 12. A pressure plate 25 and a diaphragm spring 26 are disposed between the flywheel 12 and the clutch cover 24.
レリーズフォーク28は、支点19を中心に揺動可能に設けられている。レリーズフォーク28は、その一端側をクラッチハウジング21内に収容させると共に、その他端側をクラッチハウジング21の外側に突出させている。
The release fork 28 is provided swingably around the fulcrum 19. The release fork 28 has one end side housed in the clutch housing 21 and the other end side protruding outside the clutch housing 21.
レリーズベアリング27は、ダイヤフラムスプリング26の内周縁とレリーズフォーク28の一端部との間に位置して設けられおり、これらダイヤフラムスプリング26とレリーズフォーク28とを相対回転可能にする。より詳しくは、レリーズベアリング27は、ダイヤフラムスプリング26の内周縁が接触する内輪(回転輪)Aと、レリーズフォーク28の一端部が接続された外輪(非回転輪)Cと、これら内輪A及び外輪Cの間に回転自在に配された球体Bとを備えている。レリーズベアリング27は、クラッチ装置20が断から接に切り替わる接作動時はダイヤフラムスプリング26の弾性力により出力側(図中右方向)に移動され、クラッチ装置20が接から断に切り替わる断作動時はレリーズフォーク28により押されて入力側(図中左方向)に移動される。
The release bearing 27 is provided between the inner peripheral edge of the diaphragm spring 26 and one end of the release fork 28 to allow the diaphragm spring 26 and the release fork 28 to rotate relative to each other. More specifically, the release bearing 27 includes an inner ring (rotating ring) A with which the inner peripheral edge of the diaphragm spring 26 contacts, an outer ring (non-rotating ring) C to which one end of the release fork 28 is connected, and the inner ring A and the outer ring And a sphere B rotatably disposed between C. The release bearing 27 is moved to the output side (right direction in the figure) by the elastic force of the diaphragm spring 26 at the time of contact operation when the clutch device 20 switches from disconnection to contact, and at the time of disconnection operation when the clutch device 20 switches from connection to disconnection. It is pushed by the release fork 28 and moved to the input side (left direction in the drawing).
クラッチハウジング21の外側には、レリーズシリンダ30が設けられている。レリーズシリンダ30は、シリンダ本体31の内部に移動可能に収容されて油圧室を区画するピストン32と、基端側をピストン32に固定されると共に、先端側をレリーズフォーク28に当接させたプッシュロッド33と、シリンダ本体31内に設けられてプッシュロッド33をピストン32とレリーズフォーク28との間に保持させるスプリング34とを備えている。レリーズシリンダ30は、配管35を介してマスターシリンダ60に接続されている。
A release cylinder 30 is provided outside the clutch housing 21. The release cylinder 30 is movably accommodated inside the cylinder body 31 and has a piston 32 defining an oil pressure chamber, a proximal end fixed to the piston 32, and a push whose distal end abuts against the release fork 28 A rod 33 and a spring 34 provided in the cylinder body 31 to hold the push rod 33 between the piston 32 and the release fork 28 are provided. The release cylinder 30 is connected to the master cylinder 60 via a pipe 35.
マスターシリンダ60は、作動油を貯留するリザーブタンク61と、シリンダ本体62の内部に移動可能に収容されて油圧室を区画するピストン63と、基端側をピストン63に固定されると共に、先端側をクラッチペダル70に連結させたロッド64と、油圧室内に設けられてピストン63を付勢するリターンスプリング65とを備えている。また、マスターシリンダ60には、ロッド64のストローク量(クラッチ断接)を検出するストロークセンサ56が設けられている。ストロークセンサ56のセンサ値は、電気的に接続された電子制御ユニット(以下、ECU)100に入力される。
The master cylinder 60 has a reserve tank 61 for storing hydraulic oil, a piston 63 movably accommodated in the cylinder body 62 to define an oil pressure chamber, a proximal end fixed to the piston 63, and a distal end And a clutch pedal 70, and a return spring 65 provided in the hydraulic pressure chamber for biasing the piston 63. Further, the master cylinder 60 is provided with a stroke sensor 56 that detects the stroke amount (clutch engagement / disengagement) of the rod 64. A sensor value of the stroke sensor 56 is input to an electrically connected electronic control unit (hereinafter, ECU) 100.
クラッチ装置20は、運転者がクラッチペダル70を踏み込むと、マスターシリンダ60からレリーズシリンダ30に供給される作動油圧によりピストン32がプッシュロッド33と一体にストローク移動し、レリーズフォーク28が図中反時計回りに回動してレリーズベアリング27を押圧すことで、「接」から「断」に切り替えられるようになっている。一方、クラッチ装置20は、運転者がクラッチペダル70を解放すると、ダイヤフラムスプリング26の弾性力によりクラッチディスク22のクラッチフェーシング23がフライホイール12に押し付けられることで、「断」から「接」に切り替えられるようになっている。
In the clutch device 20, when the driver depresses the clutch pedal 70, the piston 32 moves in a stroke together with the push rod 33 by the hydraulic pressure supplied from the master cylinder 60 to the release cylinder 30, and the release fork 28 is counterclockwise in FIG. By rotating around and pressing the release bearing 27, it is possible to switch from "contact" to "disconnect". On the other hand, in the clutch device 20, when the driver releases the clutch pedal 70, the clutch facing 23 of the clutch disc 22 is pressed against the flywheel 12 by the elastic force of the diaphragm spring 26, thereby switching from "disconnected" to "connected". It is supposed to be
本実施形態において、クラッチハウジング21内には、レリーズベアリング27の動作音を取得する集音機(集音手段)としてのマイク80が設けられている。マイク80は、例えば、特定の方向から入射する音を捉えやすい単一指向性、鋭指向性又は、超指向性等のマイクロホンであって、レリーズベアリング27の動作音を効果的に集音できるように、レリーズベアリング27に向けて設置されている。マイク80は、振動等の外乱の影響を受け難くするように、好ましくは、レリーズベアリング27の周囲で最も強度を確保しやすい変速機ケース41のフロントカバー部41Bに固定されている。マイク80により集音されるレリーズベアリング27の動作音は、電気的に接続されたECU100に入力される。
In the present embodiment, in the clutch housing 21, a microphone 80 as a sound collector (sound collection unit) for acquiring the operation sound of the release bearing 27 is provided. The microphone 80 is, for example, a microphone with single directivity, sharp directivity, super directivity or the like that can easily capture sound incident from a specific direction, and can effectively collect the operation sound of the release bearing 27 In the direction of the release bearing 27. The microphone 80 is preferably fixed to the front cover portion 41 B of the transmission case 41 where the strength is most easily secured around the release bearing 27 so as not to be affected by disturbances such as vibration. The operation noise of the release bearing 27 collected by the microphone 80 is input to the electrically connected ECU 100.
ECU100は、車両1の各種制御を行うもので、公知のCPUやROM、RAM、入力ポート、出力ポート等を備え構成されている。また、ECU100は、図2に示すように、動作音変化率演算部110と、残寿命演算部120と、故障診断部130とを一部の機能要素として有する。これら各機能要素は、一体のハードウェアであるECU100に含まれるものとして説明するが、これらのいずれか一部を別体のハードウェアに設けることもできる。
The ECU 100 performs various controls of the vehicle 1 and includes a known CPU, ROM, RAM, input port, output port, and the like. Further, as shown in FIG. 2, the ECU 100 has an operating sound change rate calculation unit 110, a remaining life calculation unit 120, and a failure diagnosis unit 130 as a part of functional elements. Although each of these functional elements is described as being included in the ECU 100 which is an integral hardware, any part of these may be provided in a separate hardware.
動作音変化率演算部110は、レリーズベアリング27から発せられる動作音の音圧レベルの変化率S%を演算する。より具体的には、ECU100のメモリには、レリーズベアリング27の動作音の周波数(kHz)と音圧レベル(dB)との関係を規定する動作音マップM(図3参照)が記憶されている。動作音マップMには、特定の周波数領域にて音圧レベルにピーク値PMaxを有する故障品動作音ラインLFが設定されている。この故障品動作音ラインLFは、予め実験等により故障品のレリーズベアリング27の動作音(基準動作音の一例)をマイクにより集音して得た値である。故障品の動作音の集音は、例えば、クラッチ装置20を接にした状態で変速機40の各ギヤをニュートラルにし、エンジン回転数を上昇させた際に故障品のレリーズベアリング27から発せられる動作音、又は、クラッチ装置20を断にした状態でエンジン回転数を上昇させた際に故障品のレリーズベアリング27から発せられる動作音をクラッチハウジング21内に挿入したマイクにより取得すればよい。なお、動作音マップMは、必ずしも図形化して記憶する必要は無く、数値データとして記憶してもよい。
The operation sound change rate calculation unit 110 calculates a change rate S% of the sound pressure level of the operation sound emitted from the release bearing 27. More specifically, the memory of the ECU 100 stores an operation sound map M (see FIG. 3) that defines the relationship between the frequency (kHz) of the operation sound of the release bearing 27 and the sound pressure level (dB). . In the operating sound map M, a faulty product operating sound line L F having a peak value P Max at the sound pressure level in a specific frequency region is set. The defective product operation sound line L F is a value obtained by collecting the operation sound (an example of the reference operation sound) of the release bearing 27 of the defective product in advance by experiment or the like. For example, the operation noise emitted from the release bearing 27 of the defective product when the engine speed is increased by setting each gear of the transmission 40 to neutral with the clutch device 20 in contact. A sound or an operation sound emitted from the release bearing 27 of the defective product when the engine speed is increased with the clutch device 20 disconnected may be acquired by the microphone inserted in the clutch housing 21. The operating sound map M does not necessarily have to be stored graphically and may be stored as numerical data.
動作音変化率演算部110は、まず、今回集音した動作音の音圧レベルのピーク値PNと、前回集音した動作音の音圧レベルのピーク値PN-1とのピーク値差ΔPNを演算する。次いで、動作音変化率演算部110は、前回集音時の走行距離DN-1と今回集音時の走行距離DNとの差から期間走行距離ΔDNを演算する。そして、動作音変化率演算部110は、ピーク値差ΔPNを期間走行距離ΔDNで除算することにより、前回の音圧レベルのピーク値PN-1に対する今回の音圧レベルのピーク値PNの変化率S%N(=(PN-PN-1)/(DN-DN-1))を演算する。なお、変化率S%Nの演算は、走行距離に限定されず、走行時間に基づいて行ってもよい。
Operation sound change rate arithmetic unit 110 first peak value difference between the peak value P N of the sound pressure level of the current collected by the operation sound, the peak value P N-1 of the sound pressure level of the operation sound of the previously collected Calculate ΔP N. Then, the operation sound change rate arithmetic unit 110 calculates the period travel distance [Delta] D N from the difference between the travel distance D N-1 and the travel distance D N of the current time of pickup of the previous pickup. Then, the operating sound change rate calculation unit 110 divides the peak value difference ΔP N by the period travel distance ΔD N to obtain the peak value P of the current sound pressure level with respect to the previous peak value P N−1 of the sound pressure level. N rate of change S% N (= (P N -P N-1) / (D N -D N-1)) for calculating a. The calculation of the change rate S% N is not limited to the traveling distance, and may be performed based on the traveling time.
残寿命演算部120は、今回の変化率S%N及び、今回集音した音圧レベルのピーク値PNと故障品の音圧レベルのピーク値PMaxとの差に基づいて、レリーズベアリング27に故障が発生するまでの残寿命としての走行可能距離DRNを演算する。より具体的には、残寿命演算部120は、故障品のピーク値PMaxから今回集音した音圧レベルのピーク値PNを減算して得た値を、変化率S%Nで除算することにより、走行可能距離DRNを演算する(DRN=(PMax-PN)/S%N)。なお、残寿命の演算は走行距離に限定されず、走行時間に基づいて行ってもよい。
Remaining life calculation unit 120, the current change rate S% N and, based on the difference between the peak value P Max and the peak value P N of the current collected by the sound pressure level fault product of the sound pressure level, the release bearing 27 The drivable distance D RN is calculated as the remaining life until the occurrence of a failure. More specifically, the remaining life calculation unit 120 divides a value obtained by subtracting the peak value P N of the sound pressure level collected this time from the peak value P Max of the defective product by the change rate S% N. Thus, the travelable distance D RN is calculated (D RN = (P Max −P N ) / S% N ). The calculation of the remaining life is not limited to the travel distance, and may be performed based on the travel time.
故障診断部130は、残寿命演算部120によって演算される直近の走行可能距離DRNに基づいて、レリーズベアリング27に故障発生の可能性があるか否かを判定する故障診断を実施する。より具体的には、直近の残走行可能距離DRNが所定の閾値距離DMin以下になると、故障診断部130は、レリーズベアリング27に故障発生の可能性があると判定する。閾値距離DMinは、例えば、車両1がレリーズベアリング27を交換するためにメンテナンス工場等に自走により到達できる十分な距離を確保して設定することが好ましい。故障診断部130により、レリーズベアリング27に故障発生の可能性があると判定された場合には、運転室内の表示器90にレリーズベアリング27の交換が必要な旨及び、又は走行可能距離DRNを表示させる指示信号が出力される。なお、報知の手法は表示器90への表示に限定されず、図示しないスピーカ等による音声によって行ってもよい。
Based on the latest travelable distance D RN calculated by the remaining life calculation unit 120, the failure diagnosis unit 130 carries out a failure diagnosis to determine whether or not there is a possibility of the occurrence of a failure in the release bearing 27. More specifically, when the latest remaining travelable distance D RN becomes equal to or less than a predetermined threshold distance D Min , the failure diagnosis unit 130 determines that the release bearing 27 may have a failure. The threshold distance D Min is preferably set, for example, by securing a sufficient distance by which the vehicle 1 can reach the maintenance factory or the like by self-travel in order to replace the release bearing 27. If it is determined by the failure diagnosis unit 130 that there is a possibility of occurrence of a failure in the release bearing 27, the display 90 in the driver's cab indicates that the release bearing 27 needs to be replaced and / or the travelable distance D RN . An instruction signal to be displayed is output. In addition, the method of alerting | reporting is not limited to the display to the indicator 90, You may carry out by the audio | voice by the speaker etc. which are not shown in figure.
次に、図4のフローチャートに基づいて、本実施形態の診断処理について説明する。本制御は、エンジン10のイグニッションキーON操作と同時に開始される。
Next, the diagnosis process of the present embodiment will be described based on the flowchart of FIG. The present control is started simultaneously with the ignition key ON operation of the engine 10.
ステップS100では、今回集音した動作音の音圧レベルのピーク値PNと、前回集音した動作音の音圧レベルのピーク値PN-1とのピーク値差ΔPNを、前回集音時の走行距離DN-1と今回集音時の走行距離DNとの差である期間走行距離ΔDNで除算することにより、今回の音圧レベルの変化率S%N(=(PN-PN-1)/(DN-DN-1))が演算される。
At step S100, the peak value P N of the sound pressure level of the current collected by the operation sound of the sound pressure level of the operation sound of the previously collected the peak value difference [Delta] P N of the peak value P N-1, the last collected Period of change in sound pressure level S% N (= (P N) by dividing by the period travel distance ΔD N which is the difference between the travel distance D N -1 at the time and the travel distance D N at the current sound collection. -P N-1 ) / (D N -D N -1 )) is calculated.
ステップS110では、故障品の音圧レベルのピーク値PMaxから今回の音圧レベルのピーク値PNを減算して得た値を、変化率S%Nで除算することにより、レリーズベアリング27が故障に至るまでの走行可能距離DRN(=(PMax-PN)/S%N)が演算される。
In step S110, a value obtained by subtracting the peak value P N of the current sound pressure level from the peak value P Max sound pressure level of fault products, divided by the rate of change S% N, the release bearing 27 is A travelable distance D RN (= (P Max −P N ) / S% N ) until the failure is calculated.
ステップS120では、走行可能距離DRNが所定の閾値距離DMin以下であるか否かが判定される。走行可能距離DRNが所定の閾値距離DMin以下(肯定)であれば、レリーズベアリング27に故障発生の可能性があると判定して、ステップS130に進み、表示器90にレリーズベアリング27の交換が必要な旨及び、又は走行可能距離DRNを表示する報知が実施される。
In step S120, it is determined whether the travelable distance D RN is less than or equal to a predetermined threshold distance D Min . If the travelable distance D RN is equal to or less than the predetermined threshold distance D Min (positive), it is determined that the release bearing 27 has a possibility of occurrence of a failure, and the process proceeds to step S130 and the display 90 is replaced with the release bearing 27 And / or a notification to display the travelable distance D RN is performed.
一方、ステップS120にて、走行可能距離DRNが所定の閾値距離DMinよりも長い場合(否定)、本制御はステップS100に戻され、走行可能距離DRNが所定の閾値距離DMin以下になるまで、上記ステップS100~120の処理が繰り返し実行される。
On the other hand, if it is determined in step S120 that the drivable distance D RN is longer than the predetermined threshold distance D Min (negative), the control is returned to step S100, and the drivable distance D RN is less than the predetermined threshold distance D Min . The processes of steps S100 to S120 are repeatedly executed until
以上詳述したように、本実施形態の診断装置及び診断方法によれば、車室内の運転者には感知し難いレリーズベアリング27の動作音をマイク80で集音し、該動作音の音圧レベルのピーク値を予め取得した故障品の動作音の音圧レベルのピーク値と比較することにより、レリーズベアリング27に故障が発生するまでの走行可能距離が推定演算されるようになっている。これにより、レリーズベアリング27の故障発生を効果的に予測することが可能となり、レリーズベアリング27の破損により引き起こされる車両1の路上故障を未然に防止することができる。
As described above in detail, according to the diagnostic device and the diagnostic method of the present embodiment, the operation sound of the release bearing 27 which is hard to detect by the driver in the vehicle compartment is collected by the microphone 80, and the sound pressure of the operation sound By comparing the peak value of the level with the peak value of the sound pressure level of the operation noise of the defective product obtained in advance, the travelable distance until the failure occurs in the release bearing 27 is estimated and calculated. As a result, it is possible to effectively predict the occurrence of a failure of the release bearing 27, and it is possible to prevent the road failure of the vehicle 1 caused by the breakage of the release bearing 27 in advance.
また、直近の動作音の変化率に基づいて走行可能距離を演算することにより、運転者や運転状況(運転頻度や負荷の大きさ等)に応じて変化するレリーズベアリング27の劣化進行度合いに基づいた残寿命が高精度に予測されるようになり、車両毎或は運転者により異なるレリーズベアリング27の故障発生を効果的に把握することが可能になる。
Further, based on the degree of progress of deterioration of the release bearing 27 which changes according to the driver and the driving situation (the driving frequency, the magnitude of the load, etc.) by calculating the travelable distance based on the change rate of the most recent operating noise. The remaining life can be predicted with high accuracy, and it becomes possible to effectively grasp the occurrence of a failure of the different release bearing 27 for each vehicle or driver.
なお、本開示は、上述の実施形態に限定されるものではなく、本開示の趣旨を逸脱しない範囲で、適宜変形して実施することが可能である。
Note that the present disclosure is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present disclosure.
例えば、上記実施形態では、レリーズベアリング27に故障が発生するまでの走行可能距離を演算するものとして説明したが、レリーズベアリング27の動作音の変化率から、レリーズベアリング27の劣化度合いを推定するように構成してもよい。
For example, in the above embodiment, the travelable distance until the failure of the release bearing 27 occurs is calculated, but the deterioration degree of the release bearing 27 is estimated from the rate of change of the operating noise of the release bearing 27 You may configure it.
また、クラッチ装置20は、図示例の手動クラッチ装置に限定されず、レリーズベアリング27を備えるクラッチ装置であれば、自動クラッチ装置等の他のクラッチ装置にも広く適用することができる。
Further, the clutch device 20 is not limited to the manual clutch device of the illustrated example, and any clutch device including the release bearing 27 can be widely applied to other clutch devices such as an automatic clutch device.
また、車両1は、駆動源としてエンジン10を備えるものに限定されず、走行用モータを備えるハイブリット車両等であってもよい。
Further, the vehicle 1 is not limited to one including the engine 10 as a drive source, and may be a hybrid vehicle or the like including a traveling motor.
本出願は、2017年8月31日付で出願された日本国特許出願(特願2017-167631)に基づくものであり、その内容はここに参照として取り込まれる。
This application is based on the Japanese Patent Application (Japanese Patent Application No. 2017-167631) filed on August 31, 2017, the contents of which are incorporated herein by reference.
本発明は、レリーズベアリングの故障発生を効果的に予測することができるという効果を有し、診断装置及び診断方法等に有用である。
The present invention has the effect of being able to effectively predict the occurrence of a failure of a release bearing, and is useful for a diagnostic device, a diagnostic method and the like.
10 エンジン
11 クランクシャフト
20 クラッチ装置
21 クラッチハウジング
22 クラッチディスク
23 クラッチフェーシング
24 クラッチカバー
25 プレッシャープレート
26 ダイヤフラムスプリング
27 レリーズベアリング
28 レリーズフォーク
40 変速機
41 変速機ケース
41B フロントカバー部
80 マイク(集音手段)
90 表示器(報知手段)
100 ECU
110 動作音変化率演算部(故障診断手段)
120 残寿命演算部(故障診断手段)
130 故障診断部(故障診断手段) 10Engine 11 Crankshaft 20 Clutch Device 21 Clutch Housing 22 Clutch Disc 23 Clutch Facing 24 Clutch Cover 25 Pressure Plate 26 Diaphragm Spring 27 Release Bearing 28 Release Fork 40 Transmission 41 Transmission Case 41 B Front Cover Part 80 Microphone (Sound Collection Means)
90 Indicator (informing means)
100 ECU
110 Operating sound change rate calculation unit (fault diagnosis means)
120 Remaining life calculation unit (fault diagnosis means)
130 fault diagnosis unit (fault diagnosis means)
11 クランクシャフト
20 クラッチ装置
21 クラッチハウジング
22 クラッチディスク
23 クラッチフェーシング
24 クラッチカバー
25 プレッシャープレート
26 ダイヤフラムスプリング
27 レリーズベアリング
28 レリーズフォーク
40 変速機
41 変速機ケース
41B フロントカバー部
80 マイク(集音手段)
90 表示器(報知手段)
100 ECU
110 動作音変化率演算部(故障診断手段)
120 残寿命演算部(故障診断手段)
130 故障診断部(故障診断手段) 10
90 Indicator (informing means)
100 ECU
110 Operating sound change rate calculation unit (fault diagnosis means)
120 Remaining life calculation unit (fault diagnosis means)
130 fault diagnosis unit (fault diagnosis means)
Claims (8)
- 車両に搭載された駆動源から変速機に伝達される動力を断接可能なクラッチ装置のレリーズベアリングの診断装置であって、
前記レリーズベアリングの実動作音を取得する集音手段と、
前記集音手段により取得される実動作音と、予め取得した故障品のレリーズベアリングの基準動作音とに基づいて、前記レリーズベアリングの故障発生を予測する故障診断手段と、を備える
ことを特徴とする診断装置。 A diagnostic device of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission,
Sound collecting means for acquiring an actual operation sound of the release bearing;
And a failure diagnosis unit that predicts the occurrence of a failure of the release bearing based on the actual operation sound acquired by the sound collection unit and the reference operation sound of the release bearing of the failed product acquired in advance. Diagnostic equipment. - 前記故障診断手段は、前記基準動作音の音圧レベルのピーク値と、前記実動作音の音圧レベルのピーク値との差に基づいて、前記レリーズベアリングに故障が発生するまでの走行可能距離又は走行可能時間を推定すると共に、当該走行可能距離又は当該走行可能時間が所定の閾値以下になると、前記レリーズベアリングに故障発生の可能性があると判定する
請求項1に記載の診断装置。 The failure diagnosis means is capable of traveling a distance until a failure occurs in the release bearing based on a difference between a peak value of the sound pressure level of the reference operation sound and a peak value of the sound pressure level of the actual operation sound. Alternatively, the diagnosis device according to claim 1, wherein when the travelable time or the travelable time becomes equal to or less than a predetermined threshold, it is determined that the release bearing has a possibility of occurrence of a failure. - 前記故障診断手段は、今回集音した実動作音の音圧レベルのピーク値と前回集音した実動作音の音圧レベルのピーク値との差を、今回集音時の走行距離又は走行時間から前回集音時の走行距離又は走行時間を減算して得た期間走行距離又は期間走行時間で除算することにより、前回集音時から今回集音時までの実動作音の変化率を演算すると共に、前記基準動作音の音圧レベルのピーク値と今回集音した実動作音の音圧レベルのピーク値との差を前記変化率で除算することにより、前記走行可能距離又は前記走行可能時間を演算する
請求項2に記載の診断装置。 The failure diagnostic means determines the difference between the peak value of the sound pressure level of the actual operation sound collected this time and the peak value of the sound pressure level of the actual operation sound collected last time as the travel distance or travel time at the time of current collection. Calculate the rate of change of the actual operation sound from the previous sound collection to the current sound collection by dividing it by the period travel distance or period travel time obtained by subtracting the traveling distance or traveling time from the previous sound collection. The travelable distance or travelable time can be obtained by dividing the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound collected this time by the change rate The diagnostic device according to claim 2, which calculates - 前記集音手段が、単一指向性、鋭指向性又は、超指向性のマイクロホンであり、当該マイクロホンが前記変速機の前壁部に固定されている
請求項1から3の何れか一項に記載の診断装置。 The microphone according to any one of claims 1 to 3, wherein the sound collecting means is a unidirectional, sharp directional or superdirective microphone, and the microphone is fixed to the front wall of the transmission. Diagnostic device as described. - 前記故障診断手段により前記レリーズベアリングに故障発生の可能性があると判定されると、当該情報を運転者に知らせる報知手段をさらに備える
請求項1から4の何れか一項に記載の診断装置。 The diagnostic device according to any one of claims 1 to 4, further comprising notification means for notifying the driver of the information when it is determined by the failure diagnosis means that there is a possibility of occurrence of a failure in the release bearing. - 車両に搭載された駆動源から変速機に伝達される動力を断接可能なクラッチ装置のレリーズベアリングの診断方法であって、
前記レリーズベアリングの実動作音を取得すると共に、該実動作音と、予め取得した故障品のレリーズベアリングの基準動作音とに基づいて、前記レリーズベアリングの故障発生を予測する
ことを特徴とする診断方法。 A diagnostic method of a release bearing of a clutch device capable of connecting and disconnecting power transmitted from a drive source mounted on a vehicle to a transmission,
A diagnosis characterized in that the occurrence of a failure of the release bearing is predicted on the basis of the actual operation noise of the release bearing and the reference motion sound of the release bearing of the failed product acquired in advance, while acquiring the actual operation noise of the release bearing. Method. - 前記診断方法は、
前記基準動作音の音圧レベルのピーク値と、前記実動作音の音圧レベルのピーク値との差に基づいて、前記レリーズベアリングに故障が発生するまでの走行可能距離又は走行可能時間を演算するステップと、
当該走行可能距離又は当該走行可能時間が所定の閾値以下であるか否かを判定するステップと、を含み、
前記走行可能距離又は前記走行可能時間が前記所定の閾値以下であると判定した場合に、前記レリーズベアリングに故障発生の可能性があると判定する
請求項6に記載の診断方法。 The diagnostic method is
Based on the difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound, the travelable distance or travelable time until the failure of the release bearing occurs is calculated. Step to
Determining whether the travelable distance or the travelable time is equal to or less than a predetermined threshold value,
The diagnostic method according to claim 6, wherein when it is determined that the travelable distance or the travelable time is equal to or less than the predetermined threshold value, it is determined that the release bearing may have a failure. - 前記診断方法は、
今回集音した実動作音の音圧レベルのピーク値と前回集音した実動作音の音圧レベルのピーク値との差を、今回集音時の走行距離又は走行時間から前回集音時の走行距離又は走行時間を減算して得た期間走行距離又は期間走行時間で除算することにより、前回集音時から今回集音時までの実動作音の変化率を演算するステップをさらに含み、
前記走行可能距離又は走行可能時間を演算するステップでは、前記基準動作音の音圧レベルのピーク値と今回集音した実動作音の音圧レベルのピーク値との差を前記変化率で除算することにより、前記走行可能距離又は前記走行可能時間を演算する、
請求項7に記載の診断方法。 The diagnostic method is
The difference between the peak value of the sound pressure level of the actual operation sound collected this time and the peak value of the sound pressure level of the actual operation sound collected last time from the traveling distance at the time of current collection or traveling time Calculating the rate of change of the actual operating sound from the previous sound collection to the current sound collection by dividing by the period travel distance or period travel time obtained by subtracting the travel distance or travel time;
In the step of calculating the travelable distance or the travelable time, a difference between the peak value of the sound pressure level of the reference operation sound and the peak value of the sound pressure level of the actual operation sound collected this time is divided by the change rate. Thereby calculating the travelable distance or the travelable time,
The diagnostic method according to claim 7.
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