JPH11201275A - Method and device to control the trouble of automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device to alarm the stage of the damaged shift gear of an automatic transmission to a driver, and to apply a new shift pattern excluding the stage of the damaged shift gear. SOLUTION: An abnormal vibration perceiving part 100 perceives the vibration level of a shift gear, and generates an abnormal vibration signal 131. A controller 200 responds to the abnormal vibration signal 131 from the abnormal vibration perceiving part 100, and provides a first and a second shift control signals 212 and 213 in order to control shift operation of the shift gear. A shift driving part 400 carries out the shift operation according to the first and the second shift signals 212 and 213. As a result, since the automatic transmission does not select the shift stage using the damage shift gear, when a specific stage of shift gear is damaged, a traffic accident by the damage of the shift gear can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling a malfunction of an automatic transmission when a transmission gear of the automatic transmission is damaged.

[0002]

2. Description of the Related Art A transmission is a device for smoothly shifting the running speed of an automobile. Generally, transmissions are divided into manual transmissions that are manually operated by a driver according to changes in the traveling speed of the vehicle and automatic transmissions that are automatically operated according to changes in the traveling speed of the vehicle. Automatic transmissions consist of a combination of a torque converter and planetary gears operated by adjusting the hydraulic pressure. The sensors mounted on each part of the car
A current state related to the driving of the vehicle is sensed, and the sensed state signal is provided by a shift control module for controlling the automatic transmission.

[0003] The shift control module controls a hydraulic control circuit in response to a state signal sensed by a sensor, and controls the operation of a plurality of solenoid bubbles provided in a hydraulic pipeline. When the pressure in the hydraulic line changes due to the operation of the solenoid bubble, the state of the hydraulic action on the friction member changes by the operation of a number of bubble mechanisms provided in the hydraulic line. Then, the friction member adjusts the rotation state of the transmission gear provided in the transmission gear train according to the change in the operation state of the hydraulic pressure, and shifts the rotational force generated from the engine and the power transmission means to a desired gear ratio. Output.

[0004] Therefore, an automatic transmission that rotates by power from an engine transmits a torque from an input shaft of a torque converter connected to the engine to an output shaft to move the vehicle. At this time, when the driver presses the acceleration pedal to change the traveling speed, each transmission gear provided in the transmission gear train operates to change the traveling speed of the vehicle.

[0005]

However, the transmission gears of the automatic transmission are worn by friction during a long-term operation of the automobile. Therefore, when the transmission gear of a specific number of stages of the automatic transmission is damaged, if the transmission gear damaged by the traveling speed of the vehicle is selected, a smooth shifting operation is not performed. Thus, when the driver operates the accelerator pedal, a traffic accident may occur due to malfunction of the damaged transmission gear of the automatic transmission.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a first object of the present invention is to eliminate the number of transmission gear steps which are damaged by detecting a malfunction of an automatic transmission. It is an object of the present invention to provide a method for controlling the operation of an automatic transmission with a new shift pattern.

A second object of the present invention is to provide an apparatus for detecting an erroneous operation of an automatic transmission and controlling the operation of the automatic transmission with a new shift pattern excluding a damaged shift gear stage number. is there.

[0008]

In order to achieve the first object, a method for controlling a failure of an automatic transmission according to the present invention comprises the steps of: (i) detecting a vibration detected from a currently used transmission gear; A step of determining whether or not abnormal vibration occurs based on the level; (ii) a step of storing the number of gears of the currently used transmission gear based on the determination result of step (i);
ii) applying a new transmission gear shift pattern excluding the currently used transmission gear stored in step (ii).

[0009] In order to achieve the second object described above, an apparatus for controlling a failure of an automatic transmission according to the present invention comprises:
Abnormal vibration sensing means for sensing a vibration level of the transmission gear to provide an abnormal vibration dynamic signal; and first and second control means for controlling a shifting operation of the transmission gear in response to an abnormal vibration signal from the abnormal vibration sensing means. Control means for providing a second shift control signal, and shift drive means for performing a shift operation in response to the first and second shift control signals from the control means.

In the method and apparatus for controlling a failure of an automatic transmission according to the present invention, the failure of the transmission gear is determined according to an abnormal vibration level generated from the transmission gear. Further, the shift pattern of the transmission gear is determined as a new shift pattern excluding the damaged transmission gear of the automatic transmission. Therefore, when a specific number of gears of the automatic transmission is damaged, the automatic transmission does not select the number of gears using the damaged gear, so that a traffic accident due to damage to the gear can be prevented.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a circuit configuration of an apparatus for controlling a failure of an automatic transmission according to the present invention. As shown in FIG. 1, the failure control device includes an abnormal vibration sensing unit 100, a control unit 200,
It comprises a warning unit 300 and a shift drive unit 400.
The abnormal vibration sensing unit 100 includes an acceleration sensor 110, an amplifier 120, and a filter 130. Acceleration sensor 1
10 provides a vibration signal 111 by detecting the vibration level of the transmission gear of the automatic transmission. The amplifier 120 amplifies the vibration signal 111 from the acceleration sensor 110 and
21 is output. The filter 130 filters the amplified signal 121 from the amplifier 120 to filter the abnormal vibration signal 1.
31 is provided. The abnormal vibration sensor 100 detects the vibration level of the transmission gear of the automatic transmission and detects an abnormal vibration signal 131.
Is provided to the control unit 200.

The control unit 200 responds to the abnormal vibration signal 131 from the abnormal vibration sensing unit 100 by issuing a warning control signal 211 for notifying the driver of a malfunction of the transmission gear of the automatic transmission.
Is provided to the warning unit 300. Further, the control unit 200 controls the speed change operation of the transmission gear of the automatic transmission in response to the abnormal vibration signal 131 from the abnormal vibration sensing unit 100.
And the second shift control signals 212 and 213
0 is provided. Further, the control unit 200 provides the first shift control signal 212 when the abnormal vibration signal 131 from the abnormal vibration sensing unit 100 is generated from the maximum number of gear stages of the automatic transmission.

The warning unit 300 generates a warning signal for notifying the driver of a malfunction of the transmission gear in response to a warning control signal 211 from the control unit 200. Speed change drive 400
Are the lock-up valve 410 and the shift valve 420
Consists of The lock-up valve 410 is connected to the control unit 200.
The lock-up operation of the transmission gear is interrupted in response to the first transmission control signal 212 from. Shift valve 420 shifts the speed change gear in accordance with second shift control signal 213 from control unit 200. The speed change drive unit 400 performs a speed change operation of the speed change gear of the automatic transmission according to the first and second speed change control signals 212 and 213 from the control unit 200.

The method performed by the apparatus for controlling failure of the automatic transmission shown in FIG. 1 according to the flowchart of FIG. 2 will now be described. FIG. 2 is a flowchart illustrating a method for controlling a failure of an automatic transmission using the apparatus shown in FIG. When an automobile equipped with an automatic transmission runs,
The abnormal vibration sensor 100 detects the vibration level of the currently used transmission gear of the automatic transmission (step (step) S51).
0).

The control unit 200 determines whether the abnormal vibration signal 131 is generated from the abnormal vibration sensing unit 100 due to a malfunction of the currently used transmission gear of the automatic transmission (step (step) S520).

An abnormal vibration signal 1 from the abnormal vibration sensor 100
When it is determined in step (S520) that no 31 occurs, control unit 200 repeatedly performs step (S520). When it is determined in step (S520) that the abnormal vibration signal 131 is provided from the abnormal vibration sensing unit 100, the control unit 200 determines that the number of gears of the currently used gear is the maximum number of gears of the automatic transmission. Is determined (process (step) S530).

If it is determined in step (S530) that the number of gears of the currently used transmission gear is not the maximum number of gears of the transmission gear, control unit 200 stores the number of gears of the currently used gear of the automatic transmission. Yes (process (step) S5
70).

The step (step) in which the number of gear stages currently used is the maximum number of gear stages of the automatic transmission.
If it is determined in S530, the control unit 200 provides the first shift control signal 212 to the lock-up valve 410 to temporarily suspend the lock-up operation of the lock-up valve 410 (step (S540)).

The control section 200 performs a process (step) S53.
It is determined whether the abnormal vibration signal 131 is continuously generated from the currently used transmission gear determined to be 0 and the maximum number of gears (process (step) S550).

If it is determined in step (S550) that the abnormal vibration signal 131 is not continuously generated from the currently-used maximum number of transmission gears of the automatic transmission, the controller 200
Is the process (step) S550 to the process S (step) 5
Return to 20. If it is determined in step (S550) that the abnormal vibration signal 131 is continuously generated from the transmission gear of the highest gear currently used in the automatic transmission, the control unit 200
Is the first shift control signal 21
2, the lock-up operation of the lock-up valve 410 is completely interrupted (operation (step) S560).
The control unit 200 stores the number of gears of the currently used transmission gear (process (step) S570).

The control unit 200 provides the warning unit 300 with a warning control signal 211 for notifying the driver of a malfunction of the currently used transmission gear, and operates the warning unit 300 (step (S580)).

The control unit 200 includes a shift valve 42
The second shift control signal 213 is provided to 0, and a new shift pattern of the shift gear other than the currently used shift gear is applied (step (S590)). Further, control unit 200 returns the step (step) S590 to the step (step) S520 of determining whether or not abnormal vibration signal 131 is generated from abnormal vibration sensing unit 100.

Although the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the embodiments, and a person having ordinary knowledge in the technical field to which the present invention belongs departs from the spirit and spirit of the present invention. Rather, the invention could be modified or changed.

[0024]

As described above, in the method and apparatus for controlling the failure of the automatic transmission according to the present invention, the failure of the transmission gear is determined according to the abnormal vibration level generated from the transmission gear. Further, the shift pattern of the transmission gear is determined as a new shift pattern excluding the damaged transmission gear of the automatic transmission. Therefore, when a specific plurality of transmission gears of the automatic transmission is damaged, the automatic transmission does not select the number of shift stages using the damaged transmission gear, so that a traffic accident due to damage to the transmission gear can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of an apparatus for controlling a failure of an automatic transmission according to the present invention.

FIG. 2 is a flowchart illustrating a method for controlling a failure of an automatic transmission using the apparatus shown in FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 abnormal vibration sensing unit 110 acceleration sensor 120 amplifier 130 filter 131 abnormal vibration signal 200 control unit 211 warning control signal 212 first shift control signal 213 second shift control signal 300 warning unit 400 shift drive unit 410 lockup valve 420 shift valve

Claims (10)

[Claims] (I) a step of determining whether or not abnormal vibration occurs based on a vibration level detected from a currently used transmission gear; and (ii) a step of determining based on a result of the step (i). And (iii) applying a new transmission gear shift pattern excluding the currently used transmission gear stored in step (ii). A method for controlling failure of an automatic transmission characterized by: 2. The step (i) includes: (i-1) detecting a vibration level of the currently used transmission gear; and (i-2) detecting a vibration level detected from the step (i-1). (I-3) It is determined in step (i-2) that abnormal vibration does not occur from the currently used transmission gear based on the process of determining whether or not abnormal vibration occurs from the currently used transmission gear. If the process (i-
2. The method for controlling failure of an automatic transmission according to claim 1, further comprising: returning to 1). 3. The step (ii) includes: (ii-1) determining whether the currently used transmission gear stage number is the maximum stage number; and (ii-2) determining the currently used transmission gear stage number. If it is determined in step (ii-1) that the number of stages is not the maximum number of stages, the process (ii)
i), and (ii-3) temporarily stopping the lock-up operation when it is determined in step (ii-1) that the number of gears of the currently used transmission gear is the maximum. (Ii-4) a step of determining whether or not abnormal vibration continuously occurs from the currently used transmission gear; and (ii-5) a step if abnormal vibration does not continuously occur from the currently used transmission gear. (Ii-4) when returning to step (i); and (ii-6) when it is determined in step (ii-4) that abnormal vibration continuously occurs from the currently used transmission gear. 2. The automatic transmission according to claim 1, further comprising: a step of completely interrupting the lock-up operation; and (ii-7) a step of storing the number of gears of the currently used transmission gear. Way to do. 4. The automatic transmission according to claim 1, further comprising a step of generating a warning signal to notify a driver of occurrence of abnormal vibration from the currently used transmission gear. A way to control. 5. An abnormal vibration sensing means for sensing a vibration level of the transmission gear to provide an abnormal vibration signal, and controlling a shift operation of the transmission gear in response to an abnormal vibration signal from the abnormal vibration sensing means. Control means for providing first and second shift control signals to perform the shift operation, and shift drive means for performing a shift operation in response to the first and second shift control signals from the control means. For controlling the failure of automatic transmissions. 6. An acceleration sensor for detecting a vibration level of a transmission gear to provide a vibration signal, and an abnormal sensor for amplifying a vibration signal from the acceleration sensor to output an amplified signal. The apparatus for controlling a failure of an automatic transmission according to claim 5, comprising: an amplifier; and a filter for filtering an amplified signal from the amplifier to provide an abnormal vibration signal. 7. A lock-up valve for interrupting a lock-up operation in response to a first shift control signal from the control means, and a second shift control signal from the control means. The apparatus for controlling a failure of an automatic transmission according to claim 5, further comprising a shift valve for shifting a transmission gear. 8. The automatic transmission according to claim 5, wherein the control unit generates the first shift control signal when the abnormal vibration signal is generated from a gear having the highest gear. For controlling the failure of a vehicle. 9. The apparatus for controlling a failure of an automatic transmission according to claim 5, wherein the control means provides a warning control signal for notifying a driver of a malfunction of the transmission gear. 10. The automatic transmission according to claim 9, further comprising a warning unit for notifying a driver of a malfunction of the transmission gear in response to a warning control signal from the control unit. Equipment for doing.