KR100279462B1 - Device and method for diagnosing failure of output shaft speed sensor of automatic transmission - Google Patents

Abstract

In the failure diagnosis device of the output shaft rotation speed sensor sensor of the automatic transmission to determine the failure of the PG-B using the vehicle speed reed switch, the vehicle that detects the output signal that is variable according to the driving state of the vehicle and outputs a predetermined electric signal Driving state sensing means; Even if a failure occurs in the vehicle speed reed switch in response to a predetermined electric signal output from the driving state detecting means, a failure of the PG-B is detected by the PG-A which detects the amount of change in the throttle opening degree and the rotation speed of the kick-down rum and controls the hydraulic pressure. A TCU for determining a speed change at the third speed, outputting a predetermined fault code, and outputting a request signal for vehicle inspection; According to a predetermined duty control signal output from the TCU, the shift stage is held at three speeds, and driving means for turning on the vehicle inspection lamp is provided, thereby preventing the shift stage of a high speed vehicle from being shifted at one speed. Large traffic accidents can be prevented, driver safety can be increased, and the durability of the automatic transmission can be increased.

Description

Device and method for diagnosing failure of output shaft speed sensor of automatic transmission

The present invention relates to an automatic transmission, and more specifically, to an instantaneous shift stage shift due to a failure of a vehicle speed (output shaft rotational speed (No)) sensor important for shift control while driving in a vehicle equipped with an automatic transmission. An apparatus and method for diagnosing a failure of an output shaft speed sensor of an automatic transmission for preventing a vehicle from suddenly decelerating.

In general, the target transmission stage is selected by the shift pattern diagram stored in the memory by the throttle valve opening amount which is variable according to the driver's accelerator pedal operation and the vehicle speed (No) which is output according to the vehicle driving vehicle speed. If the shift condition is satisfied after setting, the shift stage is shifted to the target shift stage for safe and comfortable driving.

Therefore, in the vehicle equipped with the automatic transmission as described above, the output shaft rotation speed for detecting the vehicle speed (No) of the traveling vehicle for setting the target gear shift stage in order to shift the gear shift stage to the predetermined gear shift stage (pulse generator-B: hereinafter). The state of the detection unit was compared with the vehicle speed reed switch 2 shown in FIG. 3 to determine whether the failure occurred.

Therefore, when the PG-B is normal, the shift control apparatus (hereinafter referred to as TCU) 20 sets a target shift stage for shifting the shift stage to a predetermined shift stage, and when the PG-B fails, The TCU outputs a predetermined control signal for prohibiting the shift stage from being shifted to another shift stage and preventing the shift stage at three speeds in order to prevent traffic accidents caused by rapid deceleration of the vehicle.

However, as shown in FIG. 4 in the above-described conventional technique, the speedometer of the cluster (not shown) located in front of the driver, which is connected to the PB-B and the TCU 20 to determine the failure of the PG-B. There is a problem in that the failure of the PG-B cannot be determined when the A-point disconnection and failure of the vehicle speed reed switch 1 which outputs the current traveling vehicle speed.

Therefore, when a failure occurs in the PG-B when a failure of the vehicle speed reed switch 1 occurs, the TCU 20 rapidly shifts the speed change stage to 1 speed as shown in FIG. There is a problem that threatens the driver's life and safety due to an accident or decreases the durability life of the automatic transmission.

Accordingly, an object of the present invention is to solve the above problems, even if a failure occurs in the vehicle speed reed switch pulse generator-A (PG-A hereinafter) to detect the amount of change in the throttle opening degree and the number of revolutions of the kick-down thrum to control the hydraulic pressure PG-B failure to determine the failure of the PG-B, the transmission stage is broken at three speeds, outputs a predetermined fault code, and output shaft rotation speed sensor detection failure diagnosis device of the automatic transmission requiring a vehicle inspection and a method thereof. It is to.

1 is a block diagram of an output shaft rotation speed sensor failure diagnosis device configuration of an automatic transmission according to an embodiment of the present invention,

2 is a flowchart illustrating a method of diagnosing a failure of a sensor detecting an output shaft speed of an automatic transmission according to an exemplary embodiment of the present invention.

3 is a conceptual diagram of a vehicle speed reed switch signal input of a conventional automatic transmission;

4 is a shift pattern diagram due to a failure of an output shaft rotation speed sensor of a conventional automatic transmission.

The present invention for achieving the above object,

In the failure diagnosis device of the output shaft rotation speed sensor sensor of the automatic transmission to determine the failure of the PG-B using the vehicle speed reed switch, the vehicle that detects the output signal that is variable according to the driving state of the vehicle and outputs a predetermined electric signal Driving state sensing means;

Even if a failure occurs in the vehicle speed reed switch by receiving a predetermined electric signal output from the driving state detecting means, the failure of PG-B is detected by PG-A which detects the amount of change in the throttle opening and the number of revolutions of the kick-down thru and controls the hydraulic pressure. A TCU for judging the shift stage at three speeds, outputting a predetermined fault code, and outputting a request signal for vehicle inspection;

And a driving means for holding the shift stage at three speeds in accordance with a predetermined duty control signal output from the TCU and turning on the vehicle inspection lamp.

Another invention for achieving the above object,

A method of diagnosing the output shaft rotation speed sensor failure of an automatic transmission that determines a failure of the PG-B by using a vehicle speed reed switch, wherein when the current traveling vehicle speed (VS) of the driving vehicle is smaller than a predetermined reference speed, Determining whether the position is a D range;

When it is determined that the shift lever position is D range when the current traveling vehicle speed VS of the vehicle being driven is smaller than the predetermined reference vehicle speed in this step, the opening amount Th of the throttle valve according to the accelerator pedal operation of the driver is set. Determining whether it is greater than a predetermined reference value;

If it is determined in this step that the opening amount Th of the throttle valve is greater than the predetermined reference value, whether the value of PG-A for detecting the rotational speed of the kick-down drum for the purpose of hydraulic control during shifting is greater than the predetermined reference value. Judging;

Determining whether to output a predetermined signal by detecting the output shaft rotation speed in the PG-B detecting the output shaft rotation speed when the value of the PG-A is larger than the predetermined reference value in the step;

Determining whether to output a predetermined signal by detecting the output shaft rotation speed in the PG-B detecting the output shaft rotation speed when the value of the PG-A is larger than the predetermined reference value in the step;

If the PG-B does not output a predetermined signal even after detecting the output shaft rotation speed, it is determined that a failure occurs in the PG-B, and a shift prohibition request signal is output so that the traveling shift stage is not shifted to another shift stage. Determining whether the output time of the shift prohibition request signal outputted above has passed a predetermined reference time;

Outputting the shift prohibition request signal and outputting a predetermined control signal for holding the shift stage at three speeds when it is determined that the output time of the shift prohibition request signal And outputting a predetermined fault code and storing the predetermined fault code in a set memory and outputting a vehicle inspection request signal for requesting the vehicle to occupy the driver.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention, which can be achieved and realized in detail by the above objects, will be described in detail with reference to the accompanying drawings.

As shown in Figure 1, the configuration of the output shaft rotation speed sensor failure diagnosis device of the automatic transmission according to an embodiment of the present invention,

A vehicle driving state detecting means 10 for detecting a signal that is variable and output according to a driving state of the vehicle and outputting a predetermined electric signal;

Even if a failure occurs in the vehicle speed reed switch by receiving a predetermined electric signal output from the driving state detecting means, the failure of PG-B is detected by PG-A which detects the amount of change in the throttle opening and the number of revolutions of the kick-down thru and controls the hydraulic pressure. A TCU 20 for judging the shift stage at three speeds, outputting a predetermined fault code, and outputting a request signal for vehicle inspection;

And a driving means 30 for holding the shift stage at three speeds and turning on the vehicle inspection lamp in accordance with a predetermined duty control signal output from the TCU 20.

In the above, the vehicle driving state detection means 10,

A throttle valve opening degree detector 11 for detecting an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of the accelerator pedal and outputting a predetermined signal;

A vehicle speed detector 12 that detects an output shaft rotational speed of the vehicle and outputs a predetermined signal corresponding to the traveling speed of the vehicle;

A shift lever detection unit 13 for detecting a signal that is variable and output according to a driver's shift lever operation and outputting the signal as a predetermined electric signal;

A turbine shaft rotational speed sensing unit 14 for sensing a rotational speed of the turbine shaft of the torque converter connected to the input shaft of the transmission and outputting a predetermined signal;

It comprises an engine speed detection unit 15 for detecting the rotational speed of the crankshaft variable according to the operating state of the engine and outputs a predetermined signal.

An output shaft rotation speed sensor failure diagnosis method of the automatic transmission made by the above configuration will be described with reference to FIG.

The TCU 20 determines whether the current traveling vehicle speed VS is greater than 45 Kph, which is a predetermined set reference vehicle speed, in the vehicle traveling at the fourth speed (S110).

When the vehicle speed of the vehicle traveling at the fourth speed is greater than 45 Kph, which is a predetermined reference reference vehicle speed, the TCU 20 multiplies the current running vehicle speed VS by an associative constant of 0.3, and the value calculated by PG-B It is determined whether the output shaft is greater than the number of revolutions (S120).

When the value calculated by multiplying the current running vehicle speed VS by the associative constant 0.3 is greater than the output shaft speed output from the PG-B, the TCU 20 outputs PG-B for detecting the output shaft speed. Is determined to be out of order and outputs a shift prohibition request signal for prohibiting the traveling shift step from being shifted to another shift step, and determines whether the shift prohibition request signal outputted above has elapsed 1sec (S130). , S140).

When the shift prohibition request signal outputted above has passed 1 sec, which is a set reference time, the TCU 20 determines that the output PG-B for detecting the output shaft rotational speed has failed, and holds the shift stage at the third speed. The control signal is output to the driving means 30, a predetermined fault code is output, stored in the set memory, and a vehicle inspection request signal for requesting the vehicle to occupy the vehicle is output (S150).

However, when the value calculated by multiplying the current running vehicle speed VS by the associative constant 0.3 in S120 is equal to or smaller than the output shaft speed output from the PG-B, the TCU 20 detects the output shaft speed. It is determined that the output PG-B is normal, releases the shift prohibition and returns to the main routine (S121).

In addition, if the shift prohibition request signal output from step S140 does not reach a predetermined time set to 1sec, the TCU 20 determines that the output PG-B detecting the output shaft rotational speed is normal, and releases the shift prohibition. Return to the routine.

However, when the current traveling vehicle speed VS of the vehicle being driven in S110 is smaller than 45 Kph, which is a predetermined reference vehicle speed, the TCU 20 determines whether the shift lever is in the D range (S200).

When it is determined that the shift lever position is D range when the current traveling vehicle speed VS of the vehicle being driven is smaller than 45 Kph, which is a predetermined reference speed, the TCU 20 opens the throttle valve according to the driver's accelerator pedal operation. It is determined whether the quantity Th is greater than 40% which is a predetermined reference value (S210).

When the opening degree Th of the throttle valve according to the driver's accelerator pedal operation is determined to be greater than 40%, which is a predetermined reference value, the TCU 20 detects the rotation speed of the kick-down drum for the purpose of hydraulic control during shifting. It is determined whether the value of PG-A to be greater than 2000 rpm, which is a predetermined reference value (S211).

When the value of PG-A which detects the rotational speed of the kick-down drum and outputs it as a predetermined signal is larger than 2000 rpm, which is a predetermined reference value, the TCU 20 rotates the output shaft in the PG-B which detects the output shaft rotational speed. The number is detected to determine whether to output a predetermined signal (S230).

When the output shaft rotational speed is detected by the PG-B detecting the output shaft rotational speed and outputs a predetermined signal, the TCU 20 determines to be normal and returns to the main routine.

However, when the value of the PG-A output in step S211 is less than or equal to a predetermined reference value of 2000 rpm, the TCU 20 returns to the main.

However, when the opening amount Th of the throttle valve Th according to the driver's accelerator pedal operation in S210 is equal to or smaller than 40%, which is a predetermined reference value, the TCU 20 kicks down for the purpose of hydraulic control during shifting. The rotation speed of the drum is detected to determine whether the value of the PG-A outputting a predetermined signal is greater than or equal to 1000 rpm, which is a predetermined reference value (S220).

When the value of the PG-A that detects the rotational speed of the kick-down drum and outputs it as a predetermined signal is greater than or equal to 1000 rpm, which is a predetermined reference value, the TCU 20 determines whether the PG-B detects the output shaft rotational speed. In operation S230, the output shaft rotation speed may be detected to determine whether to output a predetermined signal.

However, when the value of the PG-A output from the above (S220) is less than the predetermined reference value 1000rpm, the TCU 20 returns to the main routine.

Therefore, when the output shaft rotation speed does not output a predetermined signal even when the output shaft rotation speed is detected in S230, the TCU 20 detects that the output shaft rotation speed detects and outputs the output shaft rotation. In operation S240, a shift prohibition request signal is output so that the traveling shift stage is not shifted to another shift stage, and whether the output time of the shift prohibition request signal output above has passed 1 sec, which is a predetermined reference time (S240, S250).

When it is determined that the time for outputting the shift prohibition request signal has elapsed to 1 sec, which is a predetermined reference time, to prevent the shifting of the driving shift stage from another shift stage, the TCU 20 causes the shift stage to be held at three speeds. Outputs a predetermined control signal to the drive means 30, outputs a predetermined fault code, stores it in the set memory, outputs a vehicle inspection request signal for requesting the vehicle to occupy the vehicle, and returns to the main routine ( S260).

However, when the output time of the shift prohibition request signal output in step S250 does not reach 1sec, which is a predetermined reference time, the TCU 20 shifts to release the output of the shift prohibition request signal in step S240. A prohibition cancel signal is output and returned (S251).

The above embodiments are described as the most preferred embodiments, and the present invention is not limited thereto, and the embodiments can be easily described from the above embodiments.

As described above, even when a failure occurs in the vehicle speed reed switch, the PG-B determines the failure of the PG-B by detecting the amount of change in the throttle opening degree and the number of rotations of the kick-down throttle, thereby determining the failure of the PG-B. By speeding up the vehicle and outputting a predetermined fault code, it outputs a request signal to check the vehicle, thereby preventing large traffic accidents by preventing the shift stage of the 4th speed from shifting to the 1st speed. It can increase the, and there is an effect that can increase the durability of the automatic transmission.

Claims (7)

In the failure diagnosis device of the output shaft rotation speed sensor sensor of the automatic transmission to determine the failure of the PG-B using the vehicle speed reed switch, the vehicle that detects the output signal that is variable according to the driving state of the vehicle and outputs a predetermined electric signal Driving state sensing means; Even if a failure occurs in the vehicle speed reed switch by receiving a predetermined electric signal output from the driving state detecting means, the failure of PG-B is detected by PG-A which detects the amount of change in the throttle opening and the number of revolutions of the kick-down thru and controls the hydraulic pressure. A TCU for judging the shift stage at three speeds, outputting a predetermined fault code, and outputting a request signal for vehicle inspection; And a driving means for holding the shift stage at three speeds in accordance with a predetermined duty control signal output from the TCU and turning on a vehicle inspection lamp. The apparatus of claim 1, further comprising: a throttle valve opening degree detection unit configured to detect an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of an accelerator pedal and outputting a predetermined signal; A vehicle speed sensing unit configured to sense an output shaft rotational speed of the vehicle and output a predetermined signal corresponding to the traveling speed of the vehicle; A shift lever detector for detecting a signal that is variable and output according to a driver's shift lever operation and outputting a predetermined signal; A turbine shaft rotational speed sensing unit configured to output a predetermined signal by sensing a rotational speed of the turbine shaft of the torque converter connected to the input shaft of the transmission; An apparatus for diagnosing an output shaft rotation speed sensor of an automatic transmission further comprising an engine rotation speed detection unit configured to detect a rotation speed of a crankshaft variable according to an operating state of the engine and output a predetermined signal. A method of diagnosing the output shaft rotation speed sensor failure of an automatic transmission that determines a failure of the PG-B by using a vehicle speed reed switch, wherein when the current traveling vehicle speed (VS) of the driving vehicle is smaller than a predetermined reference speed, Determining whether the position is a D range; When it is determined that the shift lever position is D range when the current traveling vehicle speed VS of the vehicle being driven is smaller than the predetermined reference vehicle speed in this step, the opening amount Th of the throttle valve according to the accelerator pedal operation of the driver is set. Determining whether it is greater than a predetermined reference value; If it is determined in this step that the opening amount Th of the throttle valve is greater than the predetermined reference value, whether the value of PG-A for detecting the rotational speed of the kick-down drum for the purpose of hydraulic control during shifting is greater than the predetermined reference value. Judging; Determining whether to output a predetermined signal by detecting the output shaft rotation speed in the PG-B detecting the output shaft rotation speed when the value of the PG-A is larger than the predetermined reference value in the step; Determining whether to output a predetermined signal by detecting the output shaft rotation speed in the PG-B detecting the output shaft rotation speed when the value of the PG-A is larger than the predetermined reference value in the step; If the PG-B does not output a predetermined signal even after detecting the output shaft rotation speed, it is determined that a failure occurs in the PG-B, and a shift prohibition request signal is output so that the traveling shift stage is not shifted to another shift stage. Determining whether the output time of the shift prohibition request signal outputted above has passed a predetermined reference time; Outputting the shift prohibition request signal and outputting a predetermined control signal for holding the shift stage at three speeds when it is determined that the output time of the shift prohibition request signal And outputting a predetermined fault code and storing the predetermined fault code in a set memory and outputting a vehicle check request signal for requesting the vehicle to occupy the driver. Way. The method according to claim 3, wherein if it is determined that the opening amount Th of the throttle valve is equal to or smaller than the predetermined reference value, the value of PG-A which detects the rotation speed of the kick-down drum and outputs it as a predetermined signal is higher than the predetermined reference value. Determining whether greater than or equal to; If the value of the PG-A is greater than or equal to the predetermined reference value in the step, the step of determining whether to output the predetermined signal by detecting the output shaft rotation speed in the PG-B detecting the output shaft rotation speed Method for diagnosing failure of output shaft speed sensor of automatic transmission. The method of claim 4, further comprising determining that the PG-B is normal and returning to the main routine when the value of the output PG-A is smaller than a predetermined reference value. . The failure of the output shaft speed sensor of the automatic transmission according to claim 3, further comprising the step of determining that the PG-B is normal and returning to the main routine when the value of the output PG-A is less than or equal to a predetermined reference value. Diagnostic method. The shift stop release signal for releasing the shift stop request signal is output and returned to the main routine when the output time of the output shift prohibition request signal does not reach 1sec, which is a predetermined reference time. Method for diagnosing failure of the output shaft speed sensor of the automatic transmission further comprising.

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