KR100471875B1 - A shift control method for one way clutch failure of automatic transmission in automobile - Google Patents

Abstract

The present invention uses a 1-2 one-way clutch (OWC), the automatic transmission having a hydraulic circuit capable of engaging or releasing the brake element connected to the 1-2 one-way clutch at the driving stage, one-way while driving Determining the failure in case of a clutch failure and informing the driver of the transmission failure, and engaging the shift element at one speed by engaging the brake element with a reaction force element to drive the vehicle;

Determining whether a shift speed of the vehicle in driving is poor at 1 speed; Outputting a shift stage first speed combined duty control signal for fastening the brake element to a reaction force element when determining the shift stage first speed synchronization failure; Re-determining whether the shift stage 1 speed synchronization is poor; Determining whether the shift stage 2 speed synchronization is poor after determining the shift stage 1 speed synchronization completion; It is composed of the steps of performing 1-2 one-way clutch abnormality determination subroutine when judging the completion of two-speed synchronous transmission, so that the normal driving due to the one-way clutch failure of the automatic transmission is possible, and the soup of the one-way clutch Even in the case of a lock in which the slag is squeezed to the race, the shift stage is held at the low stage L to travel, thereby preventing damage to the power train and increasing driving stability.

Description

SHIFT CONTROL METHOD FOR ONE-WAY CLUTCH TROUBLESHOOTING FOR AUTOMATIC TRANSMISSIONS {A SHIFT CONTROL METHOD FOR ONE WAY CLUTCH FAILURE OF AUTOMATIC TRANSMISSION IN AUTOMOBILE}

The present invention relates to an automatic transmission for a vehicle, and more particularly, using a one-way one-way clutch (OWC) and connecting a brake element (ie, a low-reverse brake) connected to the one-two-way clutch. In an automatic transmission with a hydraulic circuit capable of fastening or releasing L stage reaction elements) at the driving stage, if a one-way clutch failure occurs while driving, the driver will be notified of the failure and notify the driver of the transmission failure. The present invention relates to a shift control method in case of a one-way clutch failure of an automatic transmission for a vehicle for driving at a speed coupled to one speed.

An automatic transmission for a vehicle is provided with a shift control device that automatically adjusts a transmission ratio according to a vehicle traveling speed and a load.

The shift control device performs a shift by controlling a plurality of clutches and brakes installed in the gear train in an activated or inoperative state to adjust the output rotation speed of the planetary gear device.

The automatic transmission that performs the shift as described above generally has a one-two-way clutch, and is configured to maintain the one-speed shift stage and perform one-two shifts. As such, in an automatic transmission using 1 to 2 one-way clutches, one-way clutch abnormality, that is, a kind of failure of the one-way clutch, is caused by a one-way clutch free wheel. Lay-over and one-way clutches in which the inner and outer race can turn freely in both directions, and cannot operate as a reaction element at 1 speed. The roll-over where the Sprag of the back presses against the Lay-Over and the lock that the Sprag of the one-way clutch settles on the race When it occurs, the conventional automatic shift control device makes a one-speed synchronization failure determination, and accordingly performs a three-speed holding mode in which the shift stage is held at three speeds.

However, the above-described conventional method is fixed at three speeds because power is not transmitted at one speed due to the loss of function as a reaction force element of the one-way clutch, and thus normal operation such as hill road driving is impossible, Even though the Slag is locked to the race, it outputs a signal to fix the shift stage at three speeds, so that the interlock and power train of the automatic transmission are completely damaged and it is impossible to drive. Problems leading to state are involved.

Accordingly, an object of the present invention is to solve the above problems, using a one-way one-way clutch (OWC: One Way Clutch), connected to the one-two one-way clutch (i.e. low- In an automatic transmission with a hydraulic circuit capable of fastening or releasing L-stage reaction elements such as reverse brakes, the driver may notify the driver of the transmission failure by determining the failure in case of a one-way clutch failure while driving and tighten the reaction force element. In order to provide a shift control method in the case of a one-way clutch failure of an automatic transmission for a vehicle capable of driving a vehicle by combining a shift stage at one speed.

The present invention for achieving the above object,

In an automatic transmission with a hydraulic circuit capable of engaging or releasing at the driving stage by using a 1-2 one-way clutch and using a brake element connected to the 1-2 one-way clutch as a reaction force element, the first gear shift speed of the vehicle being driven Determining whether synchronization is poor;

Outputting a shift stage first speed combined duty control signal for fastening the brake element to a reaction force element when determining the shift stage first speed synchronization failure;

Re-determining whether the shift stage 1 speed synchronization is poor;

Determining whether the shift stage 2 speed synchronization is poor after determining the shift stage 1 speed synchronization completion;

And performing a 1-2 one-way clutch abnormality occurrence determination subroutine when determining the shift stage 2 speed synchronous completion.

The above 1-2 one-way clutch abnormality occurrence determination subroutine,

The one-way clutch abnormality judgment subroutine,

Determining a required speed change stage according to a vehicle driving state;

And outputting a duty control signal for fastening and maintaining the brake element as a reaction force element when the required shift stage 1 speed is generated, and outputting a fault code generation request signal and an engine check lamp.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

This example is not intended to limit the scope of the invention, but is merely presented as an example.

1 is a block diagram of a shift control device configuration when the one-way clutch failure of the automatic transmission for a vehicle according to the present invention, Figure 2 is a flow chart of the operation control method for the one-way clutch failure of the automatic transmission according to an embodiment of the present invention, 3 is a subroutine determination of one or two-speed one-way clutch abnormality occurrence according to an embodiment of the present invention.

The shift control device in case of a one-way clutch failure of the automatic transmission for a vehicle includes a throttle valve opening, a turbine speed, an output shaft speed, an engine speed, an oil temperature, and a shift lever as shown in FIG. 1. A vehicle operation state detection device 100 for detecting a change in position and the like;

After the throttle valve opening degree, turbine rotation speed, output shaft rotation speed, engine rotation speed, oil temperature, shift lever position change, etc., which are detected and applied by the vehicle operation state detection device 100, are input, the transmission stage 1 speed synchronization failure is determined, When the shift speed 1st speed synchronization is judged, after the shift speed 1st speed combined control signal is output, it is judged again whether the shift speed 1st speed synchronization is failed again. A shift control device 200 which determines the one-way clutch abnormal phenomenon and fixes the shift stage at one speed, outputs a control signal for informing the driver by turning on the engine check lamp;

A driving device for shifting the shift stage to the target shift stage in synchronization with the shift control signal output from the shift control device 200 and the engine check lamp lighting signal, and turning on the engine check lamp so that the driver can recognize the transmission failure. It consists of 300.

The vehicle operation state detection apparatus 100 includes a throttle valve opening degree detection unit 110 for detecting a change in the throttle valve opening degree which is linked to and varied according to an accelerator pedal operation of a driver;

A turbine rotation speed detection unit (120) for detecting a change in the rotation speed of the input shaft driven by the power output from the engine according to the change in the operation state of the vehicle;

An output shaft rotation speed detection unit 130 for outputting a change in output shaft rotation speed that varies according to a change in an operation state of the vehicle;

 An engine speed detection unit 140 for detecting a change in engine speed that varies according to a change in an operation state of the vehicle;

An oil temperature detection unit 150 for detecting a change in an automatic transmission oil temperature that varies according to a change in an operation state of the vehicle;

The shift lever position detector 160 detects a shift lever position change that is variable according to the shift lever operation of the driver.

The drive device 300 includes a shift driver 310 for shifting the shift stage to the target shift stage in synchronization with a control signal output from the shift control apparatus 200;

The engine check lamp driver 320 is configured to turn on a lamp to notify the driver of an automatic transmission failure in synchronization with a control signal output from the shift control apparatus 200.

With reference to Figures 2 and 3 attached to the shift control method when the one-way clutch failure of the automatic transmission for vehicles having the above configuration will be described by way of example.

1-2 One Way Clutch (OWC) is used, and brake elements connected to 1-2 One Way Clutch (i.e. L-stage reaction elements, such as low-reverse brakes) can be engaged or released at the drive end. In an automatic transmission vehicle having a hydraulic circuit, the vehicle operation state detecting device 100 may change the opening of the throttle valve, the turbine speed, the output shaft speed, the engine speed, the oil temperature and the shift lever position, etc., which are variable during driving at the driver's will. It is detected (S100).

Accordingly, the shift control apparatus 200 receives a predetermined throttle valve opening degree, turbine rotation speed, output shaft rotation speed, engine rotation speed, oil temperature, and shift lever position change detected by the vehicle operation state detection device 100. When the control signal is output, the vehicle operation state detecting apparatus 100 detects the throttle valve opening degree, turbine rotation speed, output shaft rotation speed, engine rotation speed, oil temperature, shift lever position change, etc. detected in synchronization with the predetermined control signal. Outputs

The shift control apparatus 200 receives a throttle valve opening degree, a turbine rotation speed, an output shaft rotation speed, an engine rotation speed, an oil temperature, and a shift lever position change detected and applied by the vehicle operation state detection device 100, and a shift stage It is determined whether the first speed synchronization is not performed (S110).

That is, when the driver starts the vehicle after switching the shift lever from the neutral (N) range to the driving (D) range in order to drive the vehicle, the shift control apparatus 200 is stored in the memory according to the change of the operation state of the vehicle. A duty control signal for fastening the shift stage at one speed is output based on the stored shift pattern (not shown) and the duty pattern.

Accordingly, the driving device 300 operates an oil pump by operating the corresponding solenoid valves provided in a hydraulic circuit (not shown) for fastening the shift stage at one speed in synchronization with the duty control signal output from the shift control device 200. Oil having a predetermined hydraulic pressure discharged from (not shown) is supplied to the coupling element.

The shift control apparatus 200 outputs a duty control signal for fastening the shift stage to the first speed, and then calculates the gear ratio to determine whether the shift is completed at the first speed synchronization within the set time. Monitor the change in the transmission.

Therefore, the shift control apparatus 200 determines that the first speed synchronization is not performed within the transmission stage 1 speed synchronization completion setting time set in the memory, if the first speed synchronization completion of the transmission is not determined.

When the shift stage 1 speed synchronization is determined in the above, the shift control apparatus 200 is connected to the one-way clutch to determine whether or not the 1-2 one-way clutch (OWC) that acts as a reaction force element when the shift stage 1 speed is engaged. After outputting a combined control signal for coupling the reaction force element (eg, low-reverse brake), which is the connected brake element, the transmission stage 1 speed synchronization completion is again determined (S120, S130).

The shift stage 1-speed synchronous, in which the shift stage 1-speed synchronous completion is not determined even after the reaction force element (for example, low-reverse brake), which is a brake element connected to the one-way clutch, is determined to determine the shift stage 1-speed synchronous completion. If it is determined that the defect is determined, the shift control apparatus 200 determines that it is not a 1-2 one-way clutch failure, and fixes the shift stage at three speeds in the same manner as in the case of a normal shift stage synchronization failure stored in the memory (holding). In step S140, the shift stage 3-speed holding mode is performed.

However, when the shift stage 1 speed synchronization is determined in the above, the shift control apparatus 200 maintains the shift stage 1 speed, and the shift stage 2 speed in the process of shifting the shift stage to 2 speed according to the change of the operation state of the vehicle. It is determined whether the synchronization is poor (S150).

The reason for determining whether the shift stage 2 speed synchronization is poor is that the shift control apparatus 200 does not output a command such as shifting the shift speed to the 3rd speed (Holding) or shifting to the 2nd speed when the shift speed of the 1st speed synchronization is poor. If the required shift stage becomes second speed while driving, the shift stage is shifted to second speed.

At this time, since the shift stage second speed synchronization failure determination in the shift control apparatus 200 is determined by itself after the shift stage second speed shift, it is to determine whether the second speed synchronization failure has occurred while waiting until then.

If the shift stage 2 speed synchronization is not completed and a poor synchronization is determined, the shift control apparatus 200 outputs a predetermined shift duty control signal for maintaining the shift stage at the low stage L range 1 speed (S160). .

That is, after the shift stage 1 speed synchronization is completed, if the synchronization failure is determined during the shift stage 2 speed synchronization by the shift control device 200 according to the vehicle driving state change, in this case, the sprag of the one-way clutch OWC ) Is locked to the race, so when outputting the gear shifting three-speed holding signal, the power train of the automatic transmission is completely interlocked internally. Since the vehicle is in a state (3 speed + one-way clutch lock), the vehicle is driven while maintaining the shift stage at the low stage L according to a control signal for maintaining the shift stage at the low stage L.

In the above, the shift stage may be held at a single speed, but the brake stage (eg, low-reverse brake) is used as a reaction force rather than the broken one-way clutch (OWC) to increase stability. It is preferable to hold | maintain and drive by (L).

However, when it is determined in step S150 that the shift stage is completed at the 1st speed synchronization failure and the 2nd speed synchronization is completed, the shift control apparatus 200 has a one-way clutch sprag as a one-way clutch free wheel ( Push in the Free Wheel direction to determine the lay-over state where the inner and outer races can turn freely in both directions, and perform a 1-2 one-way clutch abnormality determination subroutine. (S170).

[1-2 One-Way Clutch Anomaly Determination Subroutine]

1-2 One-Way Clutch Abnormality Occurrence Determination When the subroutine starts, the shift control apparatus 200 determines whether the required shift stage according to the change of the vehicle operation state is 1 speed (S200, S210).

When it is determined that the required shift stage according to the vehicle operating state change is 1, the shift control apparatus 200 maintains the shift stage at the lower stage L by using a brake element (eg, a low-reverse brake) as a reaction force element. Outputs the brake element coupling duty control signal, generates the corresponding fault code according to 1-2 one-way clutch failure, and outputs the engine check lamp lighting request signal so that the driver can recognize the abnormality of the automatic transmission. S220, S230).

However, when the shift request signal other than the 1st speed is input as described above, the shift speed duty control signal stored in the memory is output, and the shift speed is completed to the target shift speed to drive the vehicle.

In the above, since the 1-2 one-way clutch is freely rotated at the shift stage other than the shift stage 1 speed, there is no problem in the other shift stage.

As a result, a minimum normal driving is possible due to the failure of the one-way clutch of the automatic transmission, and in the case of a lock in which the sprags of the one-way clutch are locked to the race, By holding by driving, it can prevent the damage of power train and at the same time improve driving stability.

As described above, the present invention uses a 1-2 one-way clutch (OWC) and drives a brake element (that is, an L-stage reaction element such as a low-reverse brake) connected to the 1-2 one-way clutch. In an automatic transmission with a hydraulic circuit capable of tightening or releasing at the stage, when a one-way clutch failure occurs while driving, the driver is notified of the occurrence of the transmission failure. By driving the vehicle, it is possible to minimize the normal running due to the failure of the one-way clutch of the automatic transmission, and even if the lock is locked to the race by the sprag of the one-way clutch, Holding by driving (L) can prevent the damage to the power train and at the same time improve the running stability.

1 is a block diagram of a shift control apparatus at the time of a one-way clutch failure of an automatic transmission for a vehicle according to the present invention;

2 is a flowchart illustrating a method of controlling a shift during a one-way clutch failure of an automatic transmission for a vehicle according to an exemplary embodiment of the present invention.

3 is a subroutine determination of one or two-speed one-way clutch abnormality occurrence according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: vehicle operation state detection device 110: throttle valve opening detection unit

120: turbine rotation speed detection unit 130: output shaft rotation speed detection unit

140: engine speed detection unit 150: oil temperature detection unit

160: shift lever position detection unit 200: shift control device

300: drive device

Claims (5)

In an automatic transmission with a hydraulic circuit capable of engaging or releasing at the driving stage by using a 1-2 one-way clutch and using a brake element connected to the 1-2 one-way clutch as a reaction force element, the first gear shift speed of the vehicle being driven Determining whether synchronization is poor; Outputting a shift stage first speed combined duty control signal for fastening the brake element to a reaction force element when determining the shift stage first speed synchronization failure; Re-determining whether the shift stage 1 speed synchronization is poor; Determining whether the shift stage 2 speed synchronization is poor after determining the shift stage 1 speed synchronization completion; When the one-way clutch failure of the automatic transmission for a vehicle characterized in that it comprises the step of performing a 1-2 one-way clutch abnormal phenomenon determination sub-routine when determining the two-speed synchronization completion of the shift stage. The method of claim 1, wherein the 1-2 one-way clutch abnormality occurrence determination subroutine, Determining a required speed change stage according to a vehicle driving state; Outputting a duty control signal for fastening and maintaining the brake element as a reaction force element at the step of the required shift stage in the step, and outputting a fault code generation and an engine check lamp lighting request signal; How to control shifting. 3. The shift control method according to claim 2, further comprising the step of outputting a duty control signal for fixing the shift stage to the low stage (L) when the requested shift stage is 1 speed. The shift control method for a one-way clutch failure of an automatic transmission for a vehicle according to claim 2, further comprising the step of outputting a corresponding shift stage engagement duty control signal if the required shift stage is a shift stage other than the first speed stage. A method according to any one of the preceding claims, wherein the brake element is a brake element connected to a 1-2 one-way clutch.