KR20160109452A - Apparatus and method controling change speed of vehicle - Google Patents

Apparatus and method controling change speed of vehicle Download PDF

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Publication number
KR20160109452A
KR20160109452A KR1020150033852A KR20150033852A KR20160109452A KR 20160109452 A KR20160109452 A KR 20160109452A KR 1020150033852 A KR1020150033852 A KR 1020150033852A KR 20150033852 A KR20150033852 A KR 20150033852A KR 20160109452 A KR20160109452 A KR 20160109452A
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KR
South Korea
Prior art keywords
speed sensor
output shaft
target gear
turbine
sensor
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KR1020150033852A
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Korean (ko)
Inventor
박정철
Original Assignee
주식회사 현대케피코
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Application filed by 주식회사 현대케피코 filed Critical 주식회사 현대케피코
Priority to KR1020150033852A priority Critical patent/KR20160109452A/en
Publication of KR20160109452A publication Critical patent/KR20160109452A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • 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
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/38—Inputs being a function of speed of gearing elements
    • F16H2059/385—Turbine speed

Abstract

The present invention relates to a shift control apparatus of a vehicle which can perform shift of an automatic transmission efficiently when a velocity sensor of an output shaft of the automatic transmission is out of order or is under failure recovery, and a method thereof. The shift control apparatus may include: a state detection part detecting whether the velocity sensor of the output shaft is normal; a counting part counting established time in accordance with a control signal provided to confirm a fault of the velocity sensor of the output shaft; and a control part which controls the vehicle to be driven in a limp-home mode by judging and confirming the fault of the velocity sensor of the output shaft in case a state that the velocity sensor of the output shaft is normal, and a vehicle velocity calculated in a turbine rotation velocity of a turbine velocity sensor is equal to or above a previously established vehicle velocity under the state that a current position of a shift lever is located at a driving gear, and the velocity of the output shaft is equal to or less than an established velocity, is maintained for established counting time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an automatic transmission of a vehicle, and more particularly, to a shift control apparatus and method of a vehicle for efficiently performing shifting of an automatic transmission upon occurrence of failure and failure recovery of an output shaft speed sensor of an automatic transmission.

In modern vehicles, many systems use the respective controllers to perform automatic control for the convenience and safety of the driver.

This provides the driver with convenience of driving the vehicle, but may cause a problem that may cause harm to the driver and the vehicle in case of malfunction or malfunction. Thus, each controller is quickly becoming aware of such malfunctions and failure situations, and is emerging as a logic capable of responding thereto.

For example, in the related art, when a failure occurs in the output shaft speed sensor during a vehicle running, the transmission is directly controlled to request a shift prohibition, and if a failure is maintained for a predetermined time, the failure is determined to be a failure, To drive the vehicle.

However, if the failure of the output shaft speed sensor does not maintain the predetermined time and the output shaft is re-output at this time, the shift is performed according to the output signal value. Therefore, if the speed change stage of the output shaft speed sensor is maintained during the failure hold time, and the speed difference between the failure occurrence and the re-output signal is large during the re-output, sudden change occurs to a specific stage, .

Therefore, there is a need to develop a technology that allows a comfortable shift without causing an uneasiness to a driver when a failure of the output shaft speed sensor is recovered after a certain time after a failure of the output shaft speed sensor occurs.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a shift control device for an automatic transmission, And a control method thereof.

That is, according to the present invention, when a failure occurs in the output shaft speed sensor of the automatic transmission and the output value of the output shaft speed sensor is normally output at a time when the failure holding time for determining the failure of the output shaft speed sensor has not elapsed, When the difference between the number of stages of the target gear and the target gear changes more than two stages, the shift is sequentially performed to the target shift stage. If the vehicle is equipped with the wheel speed sensor, And the speed of the transmission is controlled by using the speed measured by the wheel speed sensor when the speed difference (speed) is different from the wheel speed, and a method thereof.

To achieve the above object, according to one aspect of the present invention, there is provided a shift control device for a vehicle, comprising: a state detector for detecting whether an output shaft speed sensor is normal; A counting unit for counting a time set in accordance with a control signal provided for fault determination of the output shaft speed sensor; A state in which the output shaft speed sensor is normal and the vehicle speed converted to the turbine rotational speed of the turbine speed sensor is not less than a predetermined vehicle speed in a state where the current shift lever position is located at the travel gear position, And a control unit for determining a failure of the output shaft speed sensor and controlling the vehicle to travel in a limp home mode when the vehicle is maintained for a set counting time.

Wherein the control unit determines whether the wheel speed sensor is normal when the output shaft speed is detected by the output shaft speed sensor at a speed not lower than a predetermined speed in a state in which the counting time is not exceeded, (VSO: Velocity Sensor Output) according to the measured value of the output shaft speed sensor exceeds a vehicle speed (VSW: Velocity Sensor Wheel) according to the measured value of the wheel speed sensor, Determine the gear stage.

The vehicle speed according to the measured value of the wheel speed sensor is a value including a speed value in a predetermined constant error range.

Wherein the control unit controls the transmission so that the shift is sequentially performed to the target gear stage when the difference between the target gear stage calculated by the measured value of the wheel speed sensor and the present shift stage is equal to or greater than a reference value, When the difference between the target gear position and the current gear position is less than the reference value, the transmission is directly controlled to the target gear position.

If the wheel speed sensor is normal and the speed sensor output (VSO) according to the measured value of the output shaft speed sensor does not exceed the speed sensor wheel (VSW) according to the measured value of the wheel speed sensor, The target gear position is determined by the output shaft speed sensor value.

Wherein the control unit controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage determined by the output shaft speed sensor value and the current gear stage is equal to or greater than a reference value, When the difference between the target gear position and the current gear position is equal to or smaller than the reference value, the transmission is directly shifted to the target gear position.

The control unit determines whether the turbine speed sensor is normal when the wheel speed sensor is determined to be abnormal. If the turbine speed sensor is normal, a velocity sensor output (VSO) (VST: Velocity Sensor Turbine) according to the measured value of the speed sensor, and when the vehicle speed (VSO: Velocity Sensor output) according to the measured value of the output shaft speed sensor exceeds the vehicle speed VST Velocity Sensor Turbine), the target gear stage is determined by the measured value of the turbine speed sensor.

The velocity sensor turbine (VST) according to the measured value of the turbine speed sensor includes a velocity value of a set error range.

Wherein the control unit controls the transmission so that the shift is sequentially performed to the target gear stage when the difference between the target gear stage determined as the measured value of the turbine speed sensor and the current gear stage exceeds the reference value, When the difference between the gear positions of the first gear position and the second gear position does not exceed the reference value, the transmission is immediately shifted to the target gear position.

If the turbine speed sensor is normal and the speed sensor output (VSO) according to the measured value of the output shaft speed sensor does not exceed the vehicle speed (VST: Velocity Sensor Turbine) according to the measured value of the turbine speed sensor, The target gear position is determined as the output shaft speed sensor value, and when the difference between the determined target gear position and the current gear position exceeds the reference value, the transmission is controlled so as to sequentially shift to the target gear position, When the difference between the gear positions of the first gear position and the second gear position does not exceed the reference value, the transmission is immediately shifted to the target gear position.

According to another aspect of the present invention, there is provided a shift control method for a vehicle, including: detecting whether an output shaft speed sensor is normal; Comparing the vehicle speed converted to the turbine speed of the turbine speed sensor with the output shaft speed sensor being normal and the present shift lever position being at the traveling gear position and a predetermined reference vehicle speed; Determining whether the measured speed of the output shaft speed sensor is less than a predetermined speed if the vehicle speed converted into the turbine speed of the turbine speed sensor is less than a preset reference vehicle speed; Driving a timer for a set time when the measured speed of the output shaft speed sensor is equal to or lower than a set speed; When the measured speed of the output shaft speed sensor is maintained at the set speed or less in a state where the driving time of the timer exceeds the set time, determining the failure of the output shaft speed sensor and controlling the vehicle to travel in the limp home mode can do.

Determining whether the wheel speed sensor is normal if the output shaft speed is detected to be equal to or higher than a predetermined speed in a state where the timer is not exceeded in the step of driving the timer; If it is determined that the wheel speed sensor is normal, it is determined whether a speed sensor output (VSO) according to a measured value of the output shaft speed sensor exceeds a speed sensor wheel (VSW) according to a measured value of the wheel speed sensor. As a result of the determination, when the vehicle speed sensor output (VSO) according to the measured value of the output shaft speed sensor exceeds a vehicle speed (VSW) according to the measured value of the wheel speed sensor, And determining a gear stage.

The vehicle speed according to the measured value of the wheel speed sensor is a value including a speed value in a predetermined constant error range.

Comparing a difference between a target gear position and a current gear position according to a measured value of the wheel speed sensor determined in the step of determining the target gear position and a reference value; And controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage and the present shift stage is equal to or greater than a reference value according to the measured value of the wheel speed sensor, And controlling the transmission to shift directly to the target gear stage when the difference between the calculated target gear stage and the current shift stage is less than or equal to a reference value,

If the wheel speed sensor is normal and the velocity sensor output (VSO) according to the measured value of the output shaft speed sensor does not exceed the velocity sensor wheel (VSW) according to the measured value of the wheel speed sensor, And determining the target gear stage as a value.

Comparing the difference between the target gear stage and the present shift gear stage determined as the output shaft speed sensor value determined in the step of determining the target gear stage to a reference value; And controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage determined as the output shaft speed sensor value and the current gear stage is equal to or greater than the reference value as a result of the comparison, And controlling the transmission to shift directly to the target gear stage when the difference between the gear stage and the current gear stage is less than or equal to a reference value.

Determining that the turbine speed sensor is normal if it is determined that the wheel speed sensor is not normal; If it is determined that the turbine speed sensor is normal, it is determined whether a speed sensor output (VSO) according to a measured value of the output shaft speed sensor exceeds a speed sensor turbine (VST) according to a measured value of the turbine speed sensor. As a result of the determination, if the velocity sensor output (VSO) according to the measured value of the output shaft speed sensor exceeds the vehicle speed (VST: Velocity Sensor Turbine) according to the measured value of the turbine speed sensor, And determining the stage.

The velocity sensor turbine (VST) according to the measured value of the turbine speed sensor includes a velocity value of a set error range.

Determining whether a difference between a target gear position and a current gear position determined by the measured value of the turbine speed sensor determined in the determining step exceeds a reference value; And controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage determined by the turbine speed sensor and the current gear stage exceeds the reference value as a result of the determination, And controlling the transmission to be shifted to the target gear stage immediately when the difference of the shift position does not exceed the reference value.

The turbine speed sensor is normal and the speed sensor output (VSO) according to the measured value of the output shaft speed sensor is determined as a vehicle speed (VST) according to the measured value of the turbine speed sensor, Sensor Turbine), determining a target gear stage with the output shaft speed sensor value; When the difference between the determined target gear position and the current gear position exceeds a reference value, controls the transmission so that the gear position is sequentially shifted to the target gear position, and when the difference between the determined target gear position and the current shift position does not exceed the reference value And if so, directly controlling the transmission to shift to the target gear stage.

According to the shift control device and the method of the present invention, when the failure of the output shaft speed sensor of the automatic transmission occurs and the failure holding time for determining the failure of the output shaft speed sensor has not elapsed, And sequentially shifts to the target gear stage when the difference between the present speed gear stage and the target gear speed stage is two or more stages.

In the case of a vehicle equipped with a wheel speed sensor, if the output signal (speed) of the re-outputted output shaft speed sensor deviates from the speed, the speed of the transmission is controlled using the speed measured by the wheel speed sensor do.

Therefore, it is possible to minimize the shift shock at the time of the vehicle shift, thereby enabling stable running.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a shift control device for a vehicle according to the present invention. Fig.
2A to 2D are operational flowcharts of a shift control method for a vehicle according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, advantages and features of the present invention and methods of achieving them will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, And advantages of the present invention are defined by the description of the claims.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises "and / or" comprising ", as used herein, unless the recited component, step, operation, and / Or added.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a vehicle speed change control apparatus and method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a shift control device for a vehicle according to the present invention.

1, an I / G switch 10, an output shaft speed sensor 11, an output shaft speed sensor status detector 12, a turbine speed sensor 13, a turbine speed sensor status detector 14, 15, a transmission 16, a timer 17, a wheel sensor 18, a wheel sensor state detecting unit 19, and a control unit 20.

The I / G switch 10 provides the control unit 10 with a switching signal for driving the engine of the vehicle according to the selection of the driver.

The output shaft speed sensor 11 senses the speed of the final output shaft connected to the engine of the vehicle, and provides the sensed signal to the control unit 11 in a state in which the start-up of the vehicle is turned on.

The output shaft speed sensor status sensing unit 12 determines whether the output shaft speed sensor 11 is faulty according to the disconnection of the output shaft speed sensor 11 or the waveform of the output signal and provides a fault determination signal to the control unit 12.

 The turbine speed sensor 13 is a sensor for sensing the speed of the turbine connected to the engine, and provides the sensed speed signal to the control unit 20. [

The turbine speed sensor status detector 14 determines the presence or absence of an abnormality in the turbine sensor 13 and provides the control unit 20 with a detection signal of an abnormal condition of the turbine speed sensor 13. [ Here, the detection method of the abnormality of the turbine speed sensor 13 is a well-known technique, and a detailed description thereof will be omitted.

The transmission 16 is a device for shifting the speed of the vehicle under the control of the control unit 20 and detects at least one of the speed of the turbine sensor 13, the wheel sensor 18 and the output shaft speed sensor 11 And performs the shift according to the control of the control unit 20 according to the speed.

The shift position detecting portion 15 detects the current gear position of the transmission 16 and provides a detection signal to the control portion 20.

The timer 17 is driven for a predetermined time under the control of the controller 20 to determine whether the output shaft speed sensor 11 is malfunctioning when the output shaft speed sensed by the output shaft speed sensor 11 is 0 rpm.

The wheel speed sensor 18 is attached to a wheel of the vehicle and senses the rotational speed of the wheel of the vehicle and provides it to the control unit 20.

The wheel speed sensor state detection unit 19 detects the presence or absence of an abnormality in the wheel rotation sensor 180 and provides a detection signal to the control unit 20. The abnormality detection method of the wheel sensor 18 is a known technique, Is omitted.

The control unit 20 controls the output shaft speed provided from the output shaft speed sensor 11, the current speed gear ratio detected by the shifting gear end detecting unit 15, the rotational speed sensed by the turbine speed sensor 13, And determines the final failure of the output shaft speed sensor 11 and controls the transmission 16 to perform shifting at an optimum speed.

Hereinafter, a specific operation of the control unit 20 will be described.

First, the control unit 20 determines switching of the I / G switch 10 and whether or not the vehicle is started according to the engine speed although it is not shown in the figure.

When the start of the vehicle is turned on, it is determined whether or not the output shaft speed sensor 11 provided from the output shaft speed sensor state detector 12 is abnormal. Here, the determination of the abnormality of the output shaft speed sensor 11 is made by detecting the output waveform, the disconnection, and the like of the output shaft speed sensor 11. The abnormality detection method is a well known technique and will not be described in detail.

If it is determined that the detection signal provided from the output shaft speed sensor state detector 12 is not a normal signal but a failure detection signal, the control unit 20 maintains the current shift position detected by the shift position detecting unit 15, The timer 17 is driven for a set time period in order to confirm the failure of the output shaft speed sensor.

However, when it is determined that the detection signal provided from the output shaft speed sensor state detector 12 is a normal signal, it is determined whether or not the present shift position is the "D" position using the detection signal provided by the shift position detecting portion 15 do.

As a result of the determination, if it is determined that the current speed change gear position is "D ", the control unit 20 converts the speed of the vehicle using the turbine rotation speed sensed by the turbine speed sensor 13, For example, 20 Km / h.

If the speed of the converted vehicle exceeds 20 km / h, the control unit 20 determines whether the output shaft speed sensed by the output shaft speed sensor 11 is "0" rpm.

As a result of the determination, when the speed of the output shaft is "0" rpm, the transmission 16 is controlled so that the current speed change gear position of the transmission 16 is maintained at the speed change stage before the occurrence of the failure, The timer 17 is activated.

While the timer 17 is being driven (set time counting) for the set time, the controller 20 determines whether the output shaft speed from the output shaft speed sensor 11 keeps "0" rpm and keeps "0" The control unit 20 determines that a failure has occurred in the output shaft speed sensor 11 and drives the vehicle in the Limp-home mode.

However, when the output shaft speed sensed by the output shaft speed sensor 11 is not "0" rpm before the set time of the timer 17, the control unit 20 determines that the output shaft speed detected by the wheel speed sensor state detector 19 And determines whether the wheel speed sensor 18 is abnormal based on the signal.

As a result of the determination, if it is determined that the wheel speed sensor 18 is normal, a velocity sensor output (VSO) is calculated from the output shaft speed sensed by the output shaft speed sensor 11.

Then, the controller 20 calculates a velocity sensor wheel (VSW) using a signal sensed by the wheel speed sensor 18. [

The control unit 20 compares the calculated VSO value with the VSW * 1.3 or VSW * 0.7 value in which the error range (approximately ± 30%) set in the VSW value is multiplied. Here, it should be understood that the error range with respect to the VSW value is not limited to ± 30%, but may be set differently.

If the VSO value exceeds VSW * 1.3 or VSW * 0.7 as a result of the comparison, the controller 20 calculates the target number of gears using the speed value measured by the wheel speed sensor 18.

If the VSO value does not exceed the VSW * 1.3 or VSW * 0.7 value while the wheel speed sensor 18 is in a normal state, the control unit 20 calculates the target speed value by using the output shaft speed value measured by the output shaft speed sensor 11 Calculate the number of gears.

If it is determined that the wheel speed sensor 18 is not normal, the controller 20 determines whether the turbine sensor 13 is normal or not according to the signal detected by the turbine speed sensor state detector 14, , The control unit 20 calculates the target gear position based on the output shaft speed value measured by the output shaft speed sensor 11. When the turbine speed sensor 13 determines that the turbine speed sensor 13 is not normal,

However, when the turbine speed sensor 13 is normal, the controller 20 compares the measured vehicle speed from the calculated output shaft speed sensor with the vehicle speed measured by the turbine speed sensor 13. [ That is, the vehicle speed VSO measured from the output shaft speed sensor is calculated based on the vehicle speed VST * 1.3 or VST * 0.7 which takes into account the error range (approximately ± 30%) to the vehicle speed VST (Velocity Sensor Turbine) measured by the turbine speed sensor 13 ).

If the VSO value exceeds VST * 1.3 or VST * 0.7 as a result of the comparison, the control unit 20 calculates the target gear ratio at the speed value measured by the turbine speed sensor 13. [

On the other hand, when the VSO value does not exceed VST * 1.3 or VST * 0.7, the control unit 20 calculates the target gear stage at the speed value measured by the output shaft speed sensor 11. [

When the difference between the target gear ratio calculated by the speed value measured by the wheel speed sensor 18 and the turbine speed sensor 13 and the current gear ratio detected by the transmission gear stage detector 15 is 2 . Here, the difference between the current gear position and the calculated target gear position is calculated as an absolute value.

 As a result of the determination, if the difference between the current number of gears detected by the shift position detecting section 15 and the target number of gears calculated by the wheel speed sensor 18 or the speed value measured by the turbine speed sensor 13 is 2 or more , The control unit 20 controls the transmission 16 to sequentially shift to the calculated target gear stage.

Conversely, when the difference between the current number of gears detected by the speed change gear stage detection unit 15 and the target number of gears calculated by the wheel speed sensor 18 or the speed value measured by the turbine speed sensor 13 is 2 or less, (20) controls the transmission (16) to shift directly to the calculated target gear stage.

Then, the controller 20 executes the traveling at the speed of the shifted vehicle when the shifting to the target gear stage is completed according to the control, and repeats the above operation. That is, the vehicle is driven in the shifting state while continuously monitoring the abnormality of the output shaft speed sensor 11. [

If the difference between the target gear speed calculated by the output shaft speed sensor 11 and the present gear speed detected by the shift gear stage detector 15 is 2 or more, And controls the transmission 16 so as to be sequentially shifted to the gear position.

On the contrary, when the difference between the present gear ratio detected by the speed change gear ratio detecting portion 15 and the target gear ratio calculated by the speed value measured by the output shaft speed sensor 11 is 2 or less, And controls the transmission 16 to shift directly to the gear position.

Then, the control unit 20 performs the traveling at the speed of the shifted vehicle when the shifting to the target gear stage is completed according to the control, and performs all the above-mentioned operations while performing the traveling.

Hereinafter, a shift control method for a vehicle according to the present invention, which corresponds to the operation of the shift control device for a vehicle according to the present invention, will be described step by step with reference to FIGS. 2A to 2 attached hereto.

FIGS. 2A to 2D are operational flowcharts of a shift control method for a vehicle according to the present invention.

First, as shown in FIG. 2A, it is determined whether the engine rpm exceeds 400 rpm when the I / G switch is turned on and the I / G switch is turned on (S101, S102). That is, it is determined whether or not the vehicle is started.

When the starting of the vehicle is turned on, it is determined whether the output shaft speed sensor is abnormal (S103). Here, the determination of the abnormality of the output shaft speed sensor is made by detecting the output waveform, the disconnection, and the like of the output shaft speed sensor. Such an abnormality detection method is a well known technique and will not be described in detail.

If the output shaft speed sensor is not normal, the current shift stage is maintained and a timer for confirming the failure of the output shaft speed sensor is driven (S107).

However, if it is determined in step S103 that the output shaft speed sensor is normal, it is determined whether the present shift stage is the "D" stage (S104).

As a result of the determination, if it is determined that the current speed change gear position is "D ", the speed of the vehicle is converted using the turbine rotation speed sensed by the turbine speed sensor, (S105).

If the speed of the converted vehicle exceeds 20 Km / h, it is determined whether the output shaft speed detected by the output shaft speed sensor is "0" rpm (S106).

As a result of the determination, when the speed of the output shaft is "0" rpm, the transmission is controlled so that the present speed change gear of the transmission is maintained at the "D " end, and a timer for determining the failure of the output shaft speed sensor is driven to count the set time (S107).

It is determined whether the output shaft speed from the output shaft speed sensor keeps "0" rpm while the timer counts for the set time (S108).

As a result of the determination, if the output shaft speed provided from the output shaft speed sensor keeps "0" rpm while the timer is counting for the set time, it is determined whether the counting of the set time is completed, If the set time is exceeded, it is determined that a failure has occurred in the output shaft speed sensor, and the vehicle is driven in a Limp-home mode (S110).

However, if it is determined in step S108 that the output shaft speed detected by the output shaft speed sensor is not "0" rpm before the predetermined time has elapsed, it is determined whether or not the wheel speed sensor is abnormal (S111).

As a result of the determination, if it is determined that the wheel speed sensor is normal, the vehicle speed sensor (Velocity Sensor Output) from the output shaft speed sensed by the output shaft speed sensor and the vehicle speed sensor (VSW: Velocity Sensor Wheel) .

Then, the calculated VSO value and VSW * 1.3 or VSW * 0.7 values are compared (S112). That is, the calculated VSO value and the error range (approximately ± 30%) set in the VSW value are multiplied. Here, it should be understood that the error range with respect to the VSW value is not limited to ± 30% as described above, but may be set to the range correctly.

If the VSO value exceeds VSW * 1.3 or VSW * 0.7 as a result of the comparison, the target gear stage is calculated as the speed value measured by the wheel speed sensor (S113).

If the VSO value does not exceed the VSW * 1.3 or VSW * 0.7 value in step S111 and the wheel speed sensor is normal and the VSO value does not exceed the VSW * 1.3 or VSW * 0.7 value, the target gear stage is calculated as the output shaft speed value measured by the output shaft speed sensor (S117).

If it is determined in step S111 that the wheel speed sensor is not normal, it is determined whether the turbine speed sensor is normal or not (S114).

If it is determined that the turbine speed sensor is not normal, the target gear position is calculated as the output shaft speed value measured by the output shaft speed sensor (S117).

However, if the turbine speed sensor is normal in step S114, the measured vehicle speed VSO from the calculated output shaft speed sensor is compared with the vehicle speed measured by the turbine speed sensor. That is, the vehicle speed VSO measured from the output shaft speed sensor exceeds the vehicle speed (VST * 1.3 or VST * 0.7) which takes into account the error range (about ± 30%) to the vehicle speed (VST: Velocity Sensor Turbine) measured by the turbine speed sensor (S115).

If the VSO value exceeds VST * 1.3 or VST * 0.7 as a result of the comparison, the target gear stage is calculated as the speed value measured by the turbine speed sensor (S116).

On the other hand, if the VSO value does not exceed VST * 1.3 or VST * 0.7 in step S115, the target gear stage is calculated as the speed value measured by the output shaft speed sensor (S117).

It is determined whether the difference between the target number of gears calculated in steps S113 and S116, that is, the target number of gears calculated based on the speed values measured by the wheel speed sensor and the turbine speed sensor, and the number of gears of the current transmission is two (S118) . Here, the difference between the current gear position and the calculated target gear position is calculated as an absolute value.

 As a result of the determination, if the difference between the number of gears of the current transmission and the target number of gears calculated by the wheel speed sensor or the speed value measured by the turbine speed sensor is two or more, the target calculated as the wheel speed sensor value in step S113 (Step S120). In step S120, the transmission is sequentially shifted to the calculated target gear stage of the turbine speed sensor value in step S116.

On the contrary, when the difference between the gear ratio of the current transmission and the target gear ratio calculated by the wheel speed sensor or the speed value measured by the turbine speed sensor is two or less, the target gear ratio calculated as the wheel speed sensor value in step S113 And in step S116, the transmission is directly shifted to the calculated target gear stage of the turbine speed sensor value (S120).

Then, it is determined whether or not the shifting to the calculated target gear position is completed (S121). If the shifting to the target gear position is completed, the traveling is performed at the speed of the shifted vehicle, and the above operation is repeatedly performed . That is, the vehicle runs in a shifting state while continuously monitoring the abnormality of the output shaft speed sensor (S122).

On the other hand, if it is determined in step S117 that the difference between the target gear stage calculated by the output shaft speed sensor and the current gear stage of the transmission is 2 or more (S123), and if the gear stage difference is two or more stages, (Step S124) so as to sequentially shift to the target gear stage calculated by the value measured in step S124.

On the contrary, if the difference between the target gear position calculated by the output shaft speed sensor and the current gear position of the transmission is equal to or less than 2, the transmission is directly shifted to the target gear position calculated by the output shaft speed sensor value S125).

Then, in step S125, it is determined whether or not the shift to the final target gear stage is completed after the shift control (step S126). If the shift is completed, the vehicle is driven at the speed of the shifted vehicle. (S127).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various modifications, alterations, and alterations can be made within the scope of the present invention.

Therefore, the embodiments described in the present invention and the accompanying drawings are intended to illustrate rather than limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and accompanying drawings . The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

10: I / G switch 11: Output shaft speed sensor
12: Output shaft speed sensor state detecting section 13: Turbine speed sensor
14: a start-up speed sensor state detecting section 15: a shift position detecting section
16: Transmission 17: Timer
18: Wheel speed sensor 19: Wheel speed sensor status detector
20:

Claims (20)

1. A shift control device for a vehicle having an output shaft speed sensor, a wheel speed sensor, and a turbine speed sensor,
A state detector for detecting whether the output shaft speed sensor is normal;
A counting unit for counting a time set in accordance with a control signal provided for fault determination of the output shaft speed sensor; And
A state in which the output shaft speed sensor is normal and the vehicle speed converted to the turbine rotation speed of the turbine speed sensor is equal to or greater than a predetermined vehicle speed in a state where the current shift lever position is located at the traveling gear position, A control unit for determining a failure of the output shaft speed sensor and controlling the vehicle to travel in a limp home mode when it is maintained for a set counting time of the vehicle;
And the shift control device of the vehicle.
The method according to claim 1,
Wherein,
Determining whether the wheel speed sensor is normal when the output shaft speed is detected by the output shaft speed sensor at a predetermined speed or more in a state in which the counting time is not exceeded,
If it is determined that the wheel speed sensor is normal and the speed sensor output (VSO) according to the measured value of the output shaft speed sensor exceeds the speed sensor wheel speed (VSW) according to the measured value of the wheel speed sensor, And the target gear stage is determined from the measured value of the sensor.
3. The method of claim 2,
Wherein the vehicle speed according to the measured value of the wheel speed sensor is a value including a speed value in a predetermined constant error range.
3. The method of claim 2,
Wherein,
And controlling the transmission to sequentially shift to the target gear stage when the difference between the target gear stage and the present shift stage calculated by the measured value of the wheel speed sensor is equal to or greater than a reference value, And controls the transmission so that the shift is made directly to the target gear stage when the difference between the gear stage and the present shift stage is less than or equal to a reference value.
3. The method of claim 2,
Wherein,
If the wheel speed sensor is normal and the velocity sensor output (VSO) according to the measured value of the output shaft speed sensor does not exceed the velocity sensor wheel (VSW) according to the measured value of the wheel speed sensor, And the target gear position is determined as the target gear position.
6. The method of claim 5,
Wherein,
Wherein the control unit controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage determined by the output shaft speed sensor value and the current gear stage is equal to or greater than a reference value, And when the difference from the shift range is equal to or smaller than a reference value, the transmission is controlled to shift directly to the target gear range.
3. The method of claim 2,
Wherein,
If the turbine speed sensor is normal, it is determined that the turbine speed sensor is normal. If the turbine speed sensor is normal, a velocity sensor output (VSO) according to the measured value of the output shaft speed sensor is measured (VST: Velocity Sensor Turbine) according to the measured value of the turbine speed sensor, and when the vehicle speed (VSO: Velocity Sensor output) according to the measured value of the output shaft speed sensor exceeds the vehicle speed (VST: Velocity Sensor Turbine) The target gear position is determined as the measured value of the turbine speed sensor.
8. The method of claim 7,
Wherein a velocity sensor turbine (VST) according to a measured value of the turbine speed sensor includes a velocity value of a set error range.
9. The method of claim 8,
Wherein,
And controlling the transmission to sequentially shift to the target gear stage when the difference between the target gear stage and the current gear stage determined by the measured value of the turbine speed sensor exceeds a reference value, When the difference between the target gear position and the target gear position does not exceed the reference value, the transmission is directly shifted to the target gear position.
8. The method of claim 7,
Wherein,
When the turbine speed sensor is normal and the speed sensor output (VSO) according to the measured value of the output shaft speed sensor does not exceed the vehicle speed (VST: Velocity Sensor Turbine) according to the measured value of the turbine speed sensor, To determine the target gear position,
When the difference between the determined target gear stage and the current shift gear stage exceeds the reference value, the transmission is controlled so that the shift is performed sequentially to the target gear stage, and when the difference between the determined target gear stage and the present shift stage does not exceed the reference value The control means controls the transmission so as to be directly shifted to the target gear stage.
1. A shift control method for a vehicle including an output shaft speed sensor, a wheel speed sensor, and a turbine speed sensor,
Detecting whether the output shaft speed sensor is normal;
Comparing the vehicle speed converted to the turbine speed of the turbine speed sensor with the output shaft speed sensor being normal and the current shift lever position being at the travel gear position, and a predetermined reference vehicle speed;
Determining whether the measured speed of the output shaft speed sensor is less than a predetermined speed if the vehicle speed converted into the turbine speed of the turbine speed sensor is less than a preset reference vehicle speed;
Driving a timer for a set time when the measured speed of the output shaft speed sensor is equal to or lower than a set speed;
Determining a failure of the output shaft speed sensor when the measured speed of the output shaft speed sensor is maintained at a predetermined speed or less and controlling the vehicle to travel in a limp home mode when the driving time of the timer exceeds a predetermined time;
And the vehicle speed is controlled.
12. The method of claim 11,
Determining whether the wheel speed sensor is normal if the output shaft speed is detected to be equal to or higher than a predetermined speed in a state where the timer is not exceeded in the step of driving the timer;
If it is determined that the wheel speed sensor is normal, it is determined whether a speed sensor output (VSO) according to a measured value of the output shaft speed sensor exceeds a speed sensor wheel (VSW) according to a measured value of the wheel speed sensor.
As a result of the determination, when the vehicle speed sensor output (VSO) according to the measured value of the output shaft speed sensor exceeds a vehicle speed (VSW) according to the measured value of the wheel speed sensor, Further comprising the step of determining a gear stage.
13. The method of claim 12,
Wherein the vehicle speed according to the measured value of the wheel speed sensor is a value including a speed value in a predetermined constant error range.
13. The method of claim 12,
Comparing a difference between a target gear position and a current gear position according to a measured value of the wheel speed sensor determined in the step of determining the target gear position and a reference value;
And controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage and the present shift stage is equal to or greater than a reference value according to the measured value of the wheel speed sensor, Further comprising the step of controlling the transmission so that a shift is made directly to the target gear stage when the difference between the calculated target gear stage and the present shift stage is less than or equal to a reference value.
13. The method of claim 12,
If the wheel speed sensor is normal and the velocity sensor output (VSO) according to the measured value of the output shaft speed sensor does not exceed the velocity sensor wheel (VSW) according to the measured value of the wheel speed sensor, ≪ / RTI > further comprising the step of: determining a target gear range by the value of the target gear range.
16. The method of claim 15,
Comparing the difference between the target gear stage and the present shift gear stage determined as the output shaft speed sensor value determined in the step of determining the target gear stage to a reference value;
And controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage determined as the output shaft speed sensor value and the current gear stage is equal to or greater than the reference value as a result of the comparison, And controlling the transmission to shift directly to the target gear stage when the difference between the gear stage and the current gear stage is less than or equal to a reference value.
13. The method of claim 12,
Determining that the turbine speed sensor is normal if it is determined that the wheel speed sensor is not normal;
If it is determined that the turbine speed sensor is normal, it is determined whether a speed sensor output (VSO) according to a measured value of the output shaft speed sensor exceeds a speed sensor turbine (VST) according to a measured value of the turbine speed sensor.
As a result of the determination, if the velocity sensor output (VSO) according to the measured value of the output shaft speed sensor exceeds the vehicle speed (VST: Velocity Sensor Turbine) according to the measured value of the turbine speed sensor, Wherein the step of determining the speed of the vehicle includes determining the step.
18. The method of claim 17,
Wherein a velocity sensor turbine (VST) according to a measured value of the turbine speed sensor includes a velocity value in a set error range.
18. The method of claim 17,
Determining whether a difference between a target gear position and a current gear position determined by the measured value of the turbine speed sensor determined in the determining step exceeds a reference value;
And controls the transmission to sequentially shift to the target gear stage when the difference between the target gear stage determined by the turbine speed sensor and the current gear stage exceeds the reference value as a result of the determination, Further comprising the step of controlling the transmission so as to be shifted to the target gear stage immediately when the difference of the shift position does not exceed the reference value.
The method according to claim 1,
The turbine speed sensor is normal and the speed sensor output (VSO) according to the measured value of the output shaft speed sensor is determined as a vehicle speed (VST) according to the measured value of the turbine speed sensor, Sensor Turbine), determining a target gear stage with the output shaft speed sensor value;
When the difference between the determined target gear position and the current gear position exceeds a reference value, controls the transmission so that the gear position is sequentially shifted to the target gear position, and when the difference between the determined target gear position and the current shift position does not exceed the reference value And if it is determined that the target gear position is not present, controlling the transmission to shift directly to the target gear position.
KR1020150033852A 2015-03-11 2015-03-11 Apparatus and method controling change speed of vehicle KR20160109452A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190100794A (en) * 2018-02-21 2019-08-29 현대자동차주식회사 Control method for vehicle with dct

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190100794A (en) * 2018-02-21 2019-08-29 현대자동차주식회사 Control method for vehicle with dct

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