GB2332251A - Automatic transmission control with gear failure sensing - Google Patents

Automatic transmission control with gear failure sensing Download PDF

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Publication number
GB2332251A
GB2332251A GB9726056A GB9726056A GB2332251A GB 2332251 A GB2332251 A GB 2332251A GB 9726056 A GB9726056 A GB 9726056A GB 9726056 A GB9726056 A GB 9726056A GB 2332251 A GB2332251 A GB 2332251A
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GB
United Kingdom
Prior art keywords
transmission gear
transmission
malfunction
vibration
automatic transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9726056A
Other versions
GB2332251B (en
GB9726056D0 (en
Inventor
Hee-Do Yun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Priority to GB9726056A priority Critical patent/GB2332251B/en
Priority to DE19757317A priority patent/DE19757317A1/en
Publication of GB9726056D0 publication Critical patent/GB9726056D0/en
Publication of GB2332251A publication Critical patent/GB2332251A/en
Application granted granted Critical
Publication of GB2332251B publication Critical patent/GB2332251B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • G01M13/02—Gearings; Transmission mechanisms
    • G01M13/021—Gearings
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/01—Monitoring wear or stress of gearing elements, e.g. for triggering maintenance
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/01—Monitoring wear or stress of gearing elements, e.g. for triggering maintenance
    • F16H2057/012—Monitoring wear or stress of gearing elements, e.g. for triggering maintenance of gearings
    • 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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/14—Control of torque converter lock-up clutches

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

A damaged transmission gear in an automatic transmission is detected by a control system which analyses the vibration level of the transmission in each gear ratio, sensed by an acceleration sensor, and judges whether or not there is an abnormality. The transmission is then controlled in a new shift pattern which excludes the damaged transmission gear and so prevents an accident from occurring as a result of a gear failure. A warning signal is also generated to inform the driver of the gear malfunction.

Description

1 2332251 MIETHOD AND APPARATUS FOR CONTROLLING A MALFUNCTION OF AN
AUTOMATIC TRANSMISSION The present invention relates to a method and an apparatus for controlling a 1:1 malfunction of an automatic transmission when a transmission gear of an automatic transmission is damaged.
A transmission is an apparatus for smootWy changing the running speed of automobiles. In general, transmissions are divided into a manual transmission which is manually operated by drivers in accordance with a variation of the running speed of the automobiles, and an automatic transmission which is automatically operated in accordance with the variation of the running speed of the automobiles.
In the transmissions, a torque converter operates with the control of oil pressure, and the torque operates in combination with a planet gear. Sensors which are mounted on each portion of an automobile, sense present statuses concerning the running of the C, 1:1 automobile, and provide sensed status signals to a transmission control module to control the automatic transmission.
The transmission control module controls the oil Pressure control circuit in response to the status signals which are sensed by the sensors and controls an operation of a plurality of solenoid valves which are disposed on paths inside of oil pressure rubes.
When the pressure inside of the oil pressure tubes changes with the operation of the pluraliv, of solenoid valves, the operation status of the oil pressure changes applied to a friction member is changed by the operation of a plurality of valve instruments which are disposed on paths inside of the oil pressure tubes. Further, the friction member controls 1 1 the rotation status of the transmission gears which are disposed inside of a transmission gear train in response to the change of the operation status of the oil pressure, and speed changes the rotation power, which is produced by an engine and a power transmission mechanism, to a desired rate of the speed change.
Accordingly, the automatic transmission which is rotated by the power from the engine, transmits to an output axis the rotation power from an input axis of the torque converter, which is connected to the engine, and makes the automobile move. When the driver applies pressure to the acceleration pedal in order to change the running speed of the automobile, each of the transmission gears, which are disposed inside of the transmission gear train, operates to change the running speed of the automobile.
However, the transmission gears of the automatic trari smission are worn out by friction while the automobile runs for a long time. Accordingly, when the transmission gear for a specific step number is damaged in the automatic transmission and when the damaged transmission gear is selected by the running speed of the automobile, the speed change cannot be made smoothly. Consequently, when the driver operates the acceleration pedal, the malfunction of the damaged transmission gear can generate a traffic accident.
C Therefore, it is a first object of the present invention to provide a method for sensing a malfunction of an automatic transmission and for controlling an operation of an automatic transmission to change a transmission pattern of transmission gear except for a damaged transmission gear of the automatic transmission.
It is a second object of the present invention to provide an apparatus for sensing a malfunction of an automatic transmission and for controlling an operation of an automatic transmission to change a transmission pattern of transmission gear except for a damaged -1 1 transmission gear Of the automatic transmission.
In order to achieve the above first object, the present invention provides a method for controlling a malfunction of an automatic transmission, which comprises:
(i) judging whether or not an abnormal vibration is generated based on a vibration level sensed from a transmission gear being presently used; (ii) recording a step number of the transmission gear being presently used based on a result judged in step (i); and (ill) applying a transmission pattern of a transmission gear except for the presently-used transmission gear recorded in step (ii).
0 In order to achieve the above second object, the present invention provides an apparatus for controlling a malfunction of an automatic transmission, which comprises:
means for sensing a vibration level of a transmission gear and for providing an abnormality vibration signal in response to an abnormal vibration; control means for providing first and second speed change control signals controlling a speed changing operation of the transmission gear in response to the Z7 1-7 abnorTnality vibration signal from said abnormality vibration sensing means; and W Z speed change driving means for executing the speed changing operation in response to the first and second speed change control signals from the control means.
In the method and apparatus for controlling a malfunction of an automatic transmission according to the present invention. the malfunction of the transmission gear is judged in accordance with the abnormality vibration level from the transmission Rear of the automatic transmission. Also, the transmission pattern of the transmission gear Is determined as a new transmission pattern of a transmission gear except for the damaged transmission gear of the automatic transmission.
3 Accordingly, a traffic accident which is caused by the damage of the transmission gear is able to be prevented because the automatic transmission does not select the transmission pattern which uses the damaged transmission gear when the transmission gear of the automatic transmission is damaged.
The above objects and other advantage of the present invention will become more 1 apparent by describing in detail a preferred embodiment thereof with reference to the attached drawings, in which:
Fig. 1 is a block diagram for showing the circuit configuration of an apparatus for Z C1 controlline, a malfunction of an automatic transmission according to the present invention; and FIG. 2 is a flowchart for illustrating a method for controlling, a malfunction of an 0 C automatic transmission by using the apparatus shown in FIG. 1.
A description will be given below in detail with reference to the accompanying drawings to a configuration and an operation of a method and an apparatus for controlling a malfunction of an automatic transmission according to an embodiment of the present invention.
FIG. 1 is a block diagram for showing the circuit configuration of an apparatus for controlline, a malfunction of an automatic transmission accordine, to an embodment of the present invention. As shown in FIG. 1, the malfunction control apparatus comprises an abnormalitv vibration sensine, section 100. a control section 200, a warning section 300 and a speed change driving section 400.
Abnormality vibration sensing section 100 comprises an acceleration sensor 110, 4 an amplifier 120 and a filter 130. Acceleration sensor 110 senses a vibration level of a transmission gear of an automatic transmission and provides a vibration signal 111. Amplifier 120 amplifies the vibration signal 111 from the acceleration sensor 110 and outputs amplified signal 121. Filter 130 Filters the amplifying signal 121 from the amplifier 120 and provides an abnormality vibration signal 131. Abnormality vibration sensing section 100 senses the vibration level of the transmission gear of the automatic transmission and provides the abnormality vibration signal 131 to the control means 200.
Control section 200 provides a warning control signal 211 to the warning section 300 in order to inform a driver of a malfunction of the transmission gear of the automatic transmission by the abnormality vibration signal 131 from the abnormality vibration sensing section 100.
In addition, control section 200 provides first and second speed change control signals 212, 213 to the speed change driving section 400 according to the abnormality vibration signal 131 from the abnormality vibration sensing section 100, in order to C.
control a speed changing operation of the transmission gear of the automatic transmission.
1 z Also, control section 200 provides the first speed change control signal 212 when the abnormality vibration signal 1-331 from the abnormality vibration sensing section 100 is a automatic generated in the highest step number of the transmission gear of the transmission.
Warning section 300 generates a warning signal in order to inform the driver of the malfunction of the transmission -ear of the automatic transmission by the warning control signal 211 from the control section 200.
Speed change driving section 400 comprises a lock-up valve 410 and a shift valve 420. Lockup valve 410 stops a lock-up operation of the gearbox according to the first 1 speed change control signal 212 from the control section 200. Shift valve 420 changes a speed of the transmission gear according to the second speed change control signal 213 Z from the control section 200. Speed change driving section 400 executes a speed changing 4n operation of the transmission gear of the automatic transmission according to the first and Z:1 the second speed change control signals 212, 213 from the control section 200.
C> A description will be made next of the procedure of the method which is performed by the apparatus shown in FIG. 1, in accordance with the flowchart of FIG. 2 for controlling a malfunction of an automatic transmission.
FIG. 2 is flowchart for illustratina a method for controlling a malfunction of an 0 automatic transmission by using the apparatus which is shown in FIG. 1.
1 In step S510, abnormality vibration sensing section 100 senses the vibration level of the transmission gear being presently used of the automatic transmission when an automobile to which the automatic transmission is mounted is running on the road.
In step S520, control section 200 judges whether the abnormality vibration signal 131 is aenerated from the abnormality vibration sensing section 100 in accordance with 0 CP the malfunction of the transmission gear being presently used of the automatic w 17 transmission.
When it is judged in step S520 that the abnormality vibration signal 131 is not 1 - generated from the abnormality vibration sensing section 100. control section 200 W -)o executes the step S520 repeatedly.
When it is judged in step S520 that the abnormality vibration signal 131 is generated from the abnormality vibration sensing section 100. control section 200 judges if a step number of the transmission gear being presently used is the highest step number of the transmission gear of the automatic transmission(step S530).
6 When it is judged in step S530 that the step number of the transmission gear being presently used is not the highest step number of the transmission gear, control section 200 records the step number of the transmission gear being presently used of the automatic transmission(step S570).
When it is judged in step S530 that the step number of the gearbox bein presently 0 0 9 used is the highest step number of the transmission gear of the automatic transmission, control section 200 provides the first speed change control signal 212 to the lockup valve 410 and stops the lockup operation of the lockup valve 410 for a time(step S540).
In step S550, control section 200 judges whether the abnormality vibration signal 131 is continuously generated from the transmission gear being presently used which is judged as the highest step number in step S530.
When it is judged in step S550 that the abnormality vibration signal 131 is not continuously generated from the highest step number of the transmission gear being presently used of the automatic transmission, control section 200 returns from the step S550 to the step S520.
When it is judged in step 5550 that the abnormality vibration signal 13 1 is continuously generated from the highest step number of the transmission gear being presently used of the automatic transmission, control section 200 provides the first speed change control signal 212 to the lockup valve 410 and stops the lockup operation of the lockup valve 410 completely(step S560).
In step S570, control section 200 records the step number. of the transmission gear being presently used.
In step S580, control section 200 provides the waming control signal 22 11 to the warning section 300 and operates the warning section -3300 in order to inform the driver oC 7 0 a malfunction of the transmission,-,,,ear being, presently used of the automatic trammission.
CP In addition, control section 200 provides the second speed change control signal 213 and applies a new transmission pattern of a transmission gear except for the step number of the transmission gear being presently used(step S590).
Also, control section 200 returns from the step S590 to the step S520 which judges the abnormality vibration signal 131 which is generated from the abnormality vibration sensing section 100.
In the method and apparatus for controlling a malfunction of an automatic transmission according to the present invention, the malfunction of the transmission gear is judged in accordance with the abnormality vibration level from the transmission gear of the automatic transmission. Also, the transmission pattern of the transmission gear is determined as a new transmission pattern of a transmission gear except for the damaged transmission aear of the automatic transmission.
Accordingly, traffic accident which is caused by the damage of the transmission gear is able to be prevented because the automatic transmission does not select the transmission pattern which uses the damaged transmission crear when the transmission gear of the specific step number of the automatic transmission is damaged.
While the present invention had been particularly shown and described with reference to a particular embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be effected therein without departing from the scope of the invention as defined by the appended claims.
8

Claims (1)

  1. A method capable of controlling a malfunction of an automatic transmission when a transmission gear of the automatic transmission is damaged, characterized by Z:1 comprising the steps of:
    (i) judging whether or not an abnormal vibration is generated based on a vibration level sensed from a transmission gear being presently used; (ii) recording a step number of said transmission gear being presently used based on a result judged in step (i); and 0 (iii) applying a transmission pattern of a transmission gear except for said presently-used transmission gear recorded in step (ii).
    4 2. The method for controlling a malfunction of an automatic transmission as claimed in claim 1, characterized in that said step (i) comprises the substeps of:
    (11) sensing said vibration level of said transmission gear being presently used; 1 -- 11) (i-2) judging whether or not an abnormal vibration is generated from said transmission gear being presently used based on said vibration level sensed in step (1-1); and (1-3) returning to step (i-1) when it is judged in step (1-2) that said abnormal vibration is not generated from said transmission crear being presently used.
    7 1:1 Z1 1 1 The method for controllins a malfunction of an automatic transmission as claimed in claim 1 or 2 wherein said step (ii) comprises the substeps of:
    (11-1) 'udgincr whether or not said step number of said transmission gear beirio, J 1 -- t 9 presently used is a highest step number; (ii-2) proceeding to step (iii) when it is judged in step (ii-1) that said step number 1 1 0 of said transmission gear being presently used is not the highest step number; C> ZP C (ii-3) stopping a lockup operation for a time when it is judged in step (ii-1) that said step number of said transmission gear being presently used is the highest step number; (ii-4) judging whether or not said abnormal vibration is continuously generated c> 1:1 C from said transmission gear being presently used; C t> (ii-5) returning to step (i) when it is judged in step (ii-4) that said abnormal vibration is not continuously generated from said transmission gear being presently used; (ii-6) stopping said lockup operation completely when it is judged in step (ii-4) that 'd abnormal vibration is continuously generated from said transmission gear being sal 1 1 presently used; and (11-7) recording said step number of said transmission gear being presently used.
    p - 4. The method for controlling a malfunction of an automatic transmissi t, 1 1 ion as claimed in any preceding claim, further comprising the substeps of:
    generating a warning signal in order to inform a driver by said abnormal vibration generated from said transmission gear being presently used.
    5. An apparatus capable of controlling a malfunction of an automatic transmission when a transmission gear of the automatic transmission is damaged. charaterized by conprising: means for sensing a vibration level of a transmission gear and for providing an abnormality vibration signal in response to an abnormal vibration; control means for providing first and second speed change control signals controlling a speed changing operation of said transmission gear in response to said abnormality vibration signal from said abnormality vibration sensing means; and CI speed change driving means for executing said speed changing operation in d fl response to sai irst and second speed change control signals from said control means.
    6. The apparatus for controlling a malfunction of an automatic transmission as claimed in claim 5, characte rized in that said abnormality vibration sensing means comprises:
    an acceleration sensor for sensing said vibration levelof said transmission gear and for providing a vibration signal; an amplifier for amplifying said vibration signal from said acceleration sensor and for outputting an amplified signal; and 1- 0 a filter for filtering said amplified signal from said amplifier and for providing t) said abnormality vibration signal.
    7. The apparatus for controlling a malfunction of an automatic transmission as claimed in claim 5 or 6 wherein said speed change driving means comprises: a lock-up valve for stopping a lockup operation in response to said first speed change control signal from said control means; and a shift valve for changing a speed of said gearbox in response to said second speed 1:1 W change control signal from said control means.
    Z 11 8. The apparatus for controlling a malfunction of an automatic transmission as claimed in any one of claim 5-7 wherein said control means generates said first speed change control signal when said abnormality vibration signal is produced because of said 0:0 transmission gear of the highest step number.
    C1 9. The apparatus for controlling a malfunction of an automatic transmission as claimed in any one of claims 5-8 wherein said control means provides a w3ming cultrol sianal ' order to inform a driver of a malfunction of said transmission -ear.
    in 10. The apparatus for controlling a malfunction of an automatic transmission as claimed in claim 9, characterized in that said apparatus further comprising: warning means for informing a driver of said malfunction of said transmission gear in response to said warning control signal from said control means.
    1 C CJ 11. A method for controlling a malfunction of an automatic transmission substantially as hereinbefore described with reference to FIG. 2 of the accompanying drawing.
    1 12, An apparatus for controlling a malfunction of an automatic transmission.
    the apparatus constructed and arranged substanially as herein described with reference to or as illustrated in FIG. 1 of the accompanying drawing 12
GB9726056A 1997-12-09 1997-12-09 Method and apparatus for controlling a malfunction of an automatic transmission Expired - Fee Related GB2332251B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9726056A GB2332251B (en) 1997-12-09 1997-12-09 Method and apparatus for controlling a malfunction of an automatic transmission
DE19757317A DE19757317A1 (en) 1997-12-09 1997-12-23 Motor vehicle automatic transmission control with gear failure sensing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9726056A GB2332251B (en) 1997-12-09 1997-12-09 Method and apparatus for controlling a malfunction of an automatic transmission
DE19757317A DE19757317A1 (en) 1997-12-09 1997-12-23 Motor vehicle automatic transmission control with gear failure sensing

Publications (3)

Publication Number Publication Date
GB9726056D0 GB9726056D0 (en) 1998-02-04
GB2332251A true GB2332251A (en) 1999-06-16
GB2332251B GB2332251B (en) 1999-10-27

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GB9726056A Expired - Fee Related GB2332251B (en) 1997-12-09 1997-12-09 Method and apparatus for controlling a malfunction of an automatic transmission

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DE (1) DE19757317A1 (en)
GB (1) GB2332251B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7444219B2 (en) 2002-07-09 2008-10-28 Zf Friedrichshafen Ag Device for evaluating vehicle, driving and operating parameters
CN115451121A (en) * 2022-10-13 2022-12-09 同济大学 Vehicle gear shifting control method, device, equipment and readable storage medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2435843T3 (en) 2011-07-18 2013-12-23 Siemens Aktiengesellschaft Procedure for detecting gear damage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872337A (en) * 1988-01-29 1989-10-10 Watts Robert J Nondestructive testing of gears
US5493928A (en) * 1994-10-14 1996-02-27 Caterpillar Inc. Transmission control default operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872337A (en) * 1988-01-29 1989-10-10 Watts Robert J Nondestructive testing of gears
US5493928A (en) * 1994-10-14 1996-02-27 Caterpillar Inc. Transmission control default operation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7444219B2 (en) 2002-07-09 2008-10-28 Zf Friedrichshafen Ag Device for evaluating vehicle, driving and operating parameters
CN115451121A (en) * 2022-10-13 2022-12-09 同济大学 Vehicle gear shifting control method, device, equipment and readable storage medium
CN115451121B (en) * 2022-10-13 2023-10-27 同济大学 Transmission self-adjusting balanced shift strategy considering gear life

Also Published As

Publication number Publication date
GB2332251B (en) 1999-10-27
DE19757317A1 (en) 1999-07-15
GB9726056D0 (en) 1998-02-04

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20011209