KR20180061465A - Apparatus for detecting shift error of shift by wire system and method thereof - Google Patents

Abstract

Disclosed are an apparatus and a method for a diagnosis of errors in a transmission of an SBW system. The objective of the present invention is to diagnose errors in transmission control during transmission control by user′s willingness or during automatic transmission control to maintain a vehicle in a safe state. According to the present invention, the method comprises the following steps of: allowing a controller to detect whether or not an automatic transmission is performed in accordance with user′s willingness to transmit or a driving condition; allowing the controller to determine whether or not predetermined transmission control in accordance with the willingness to transmit or the automatic transmission is performed to determine whether or not errors exist in the transmission control in accordance with the determination result; and allowing the controller to control a vehicle according to errors in the transmission control.

Description

[0001] APPARATUS FOR DETECTING SHIFT ERROR OF SHIFT BY WIRE SYSTEM AND METHOD THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for diagnosing a shift control error in a SBW (SHIFT BY WIRE) system, and more particularly, to a shift control error in an SBW system for diagnosing a shift control by an intention of a driver or an automatic shift control Diagnostic apparatus and method.

As a result of the adoption of x-by-wire technology, current mechanical elements such as brakes, handles and shift lever are converted into electric signal wires. In the operating mode, the electronic control unit and the electronic control method by the actuator were changed.

This allows the transmission to be electronically controlled beyond conventional instrument / mechanical limits, and is particularly compatible with the Advanced Driver Assistance Systems (ADAS), helping the driver to drive and providing the operator with trouble / It is also possible to control the device itself by judging it.

In the case of an automatic transmission, unlike a manual transmission, an optimum gear position is determined without a driver's operation in a drive state, and the shift is carried out by itself, and appropriate engine cooperative control and lockup clutch control are performed to improve a shift feeling and fuel economy.

Particularly, in the case of an automatic transmission equipped with an electronic shift lever, even the basic P / R / N / D control, which requires driver operation in a conventional automatic transmission vehicle, can be controlled without driver intervention to cope with a trouble / As well as longitudinal control necessary for autonomous parking and autonomous driving.

Unlike manual shift lever, which is composed of existing mechanism or mechanical element, shift lever of electronic shift lever (Shift-By-Wire) type automatically shifts by electronic control.

However, in the conventional SBW (SHIFT BY WIRE) system, if an error occurs in the electronic control, there may arise a problem that the vehicle moves in an undesired direction of the driver or the vehicle moves in a parking state.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-1533092 (May 25, 2015) entitled " Electronic Electronic Smart Shift Lever Device. &Quot;

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an automatic transmission shift control system for an automatic transmission shift control And to provide an apparatus and method for diagnosing a shift control error of a system.

According to an aspect of the present invention, there is provided a method of diagnosing a shift error of an SBW system, the method comprising: detecting whether the control unit is automatically shifting according to a driver's shift intention or a driving condition; Determining whether a shift control is performed according to the shift intention or the automatic shift, and determining a shift control error according to a determination result; And controlling the vehicle according to the shift control error.

In the step of determining the shift control error according to the present invention, when the shift control is determined to be the forward or reverse control in a state in which the position of the gear position is neutral or parked and the shift lever is not operated, And a determination is made.

In the present invention, the control unit may be configured such that the position of the gear position calculated by the automatic transmission controller is the D- or R-stage, the direction information to be traveled is forward or backward, or the solenoid valve combination for the gear- Or the R-step state, it is determined as the shift control error.

In the step of determining the shift control error according to the present invention, the control unit determines the shift control error when the shift control is determined to be different from the shift direction of the shift lever.

In the present invention, it is preferable that, in a state in which the shift direction of the shift lever corresponds to the forward travel of the vehicle, the control unit determines that the position of the shift position calculated by the automatic transmission controller is R- And when the solenoid valve combination for the speed change step control is in the R-step state, the shift control error is determined.

In the present invention, it is preferable that the control unit determines that the position of the gear position calculated by the automatic transmission controller is in the D-stage, the direction information to be traveled is the forward direction, And when the solenoid valve combination for the speed change stage control is in the D-stage state, the shift control error is determined.

In the step of determining the shift control error according to the present invention, the control unit is characterized in that when the shift condition satisfies the parking condition or the position of the shift position is the P-position, and the shift control is not the parking control, .

In the present invention, if the calculated shift position calculated by the automatic transmission controller is not the P-stage, the solenoid valve combination is not the P-stage state, or the parking mechanism state is not the P-stage state, And a determination is made.

In the step of determining the shift control error according to the present invention, the control unit determines that the vehicle speed is higher than the set speed or is determined as the N-step by the shift-by-wire control logic at the ignition off time, When the speed change control is not the travel control, the speed change control error is determined to be the speed change control error.

In the present invention, the control unit determines that the shift control error is determined to be the P-step, the P-step state, or the P-step state of the parking mechanism state calculated by the automatic transmission controller .

An apparatus for diagnosing a shift control error of an SBW system according to an aspect of the present invention includes a solenoid valve for shifting a speed change stage; And whether or not the automatic shift according to the shift intention or the driving condition of the driver inputted from the shift lever sensor is detected and whether or not the shifting intention detected or the predetermined shift control according to the automatic shift is performed, And a control unit for controlling the solenoid valve.

In the present invention, the control unit determines whether the position of the gear stage calculated by the automatic transmission controller is the D-stage or R-stage or the direction information to be traveled And when the solenoid valve combination for forward or reverse or for the speed change stage control is in the D-stage or R-stage, the shift control error is determined.

In the present invention, it is preferable that the control unit determines that the position of the gear position calculated by the automatic transmission controller is R-stage, the direction information to be traveled is the reverse direction, And when the solenoid valve combination for the speed change step control is in the R-step state, the shift control error is determined to be the error.

In the present invention, it is preferable that the control unit determines that the position of the gear position calculated by the automatic transmission controller is in the D-stage, the direction information to be traveled is the forward direction, And when the solenoid valve combination for the speed change stage control is in the D-stage state, the shift control error is determined.

In the present invention, when the parking condition is satisfied or the position of the speed change stage is P stage, the control unit determines that the position of the gear stage calculated by the automatic transmission controller is not the P stage or the solenoid valve combination is not the P stage Or if the parking mechanism state is not the P-stall state, it is determined as the shift control error.

In the present invention, when the vehicle speed is equal to or higher than the set speed, or when the ignition is off, the control unit is determined as the N-th speed by the shift-by-wire control logic and the vehicle speed is equal to or higher than the set speed. And the solenoid valve combination is in the P-step state or the parking mechanism state is in the P-step state, the shift control error is determined to be the shift control error.

An apparatus and method for diagnosing a shift control error of an SBW system according to an aspect of the present invention diagnose a shift control based on a driver's intention or an automatic shift control to maintain a safe state of the vehicle.

1 is a block diagram of an apparatus for diagnosing a shift control error of an SBW system according to an embodiment of the present invention.
2 is a flowchart illustrating an example of a method for diagnosing a shift control error of an SBW system according to an embodiment of the present invention.
3 is a flowchart showing another example of a shift control error diagnosis method of an SBW system according to an embodiment of the present invention.
4 is a flowchart showing another example of a shift control error diagnosis method of an SBW system according to an embodiment of the present invention.
5 is a flowchart showing another example of a shift control error diagnosis method of the SBW system according to an embodiment of the present invention.

Hereinafter, an apparatus and method for diagnosing a shift control error of an SBW system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the user, the intention or custom of the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram of a shift miss device of an SBW system according to an embodiment of the present invention.

Referring to FIG. 1, an apparatus for diagnosing a shift error of an SBW system according to an embodiment of the present invention includes a shift lever sensor 20, an actuator sensor 30, a vehicle speed sensor 50, a speed sensor 60, 70, a solenoid valve 80, a control unit 90, a parking sensor 100, and a parking switch 110.

The shift lever sensor 20 transmits the shift operation state of the driver to the control unit 90. [ That is, the shift lever sensor 20 includes the parking button 40 to notify the controller 90 that the position of the shift lever directly operated by the driver as well as the vehicle parking is the R-stage, N-stage, D- do.

The actuator sensor 30 senses the state of the actuator that shifts the speed change stage, that is, the solenoid valve 80, and selects one of the P state, the R state, the N state, and the D state through the drive combination of the solenoid valve 80 Detection.

That is, the actuator sensor 30 senses any one of the operating states of the solenoid valve 80, for example, the P state, the R state, the N state, and the D state so that the controller 90 controls the current actuator operation So that the state of the solenoid valve 80 can be recognized.

The vehicle speed sensor 50 senses the vehicle speed. As the vehicle speed sensor 50, a navigation system of the vehicle may be employed in addition to a sensor that senses the vehicle speed through the wheel speed of the vehicle or the like.

The speed sensor 60 is a sensor for measuring a transmission output stage, and senses the transmission output shaft speed and the traveling direction of the vehicle.

The warning unit 70 can warn the driver of the shift control error by video or audio. The warning unit 70 may be installed in a cluster or the like of the vehicle, and outputs a warning sound according to the shift control error state or outputs an image or an image corresponding to the shift control error.

The solenoid valve 80 is for controlling the transmission. The solenoid valve 80 may be a transmission state, for example, an R-stage state, an N-stage state, a D-stage state, a P- State.

The parking sensor 100 and the parking switch 110 are installed in a parking mechanism to transmit whether the vehicle is parked.

The control unit 90 detects whether or not the automatic transmission is in accordance with the driver's shift intention or the driving condition, determines whether or not predetermined shift control is performed according to the shift intention or the vehicle shift, and determines the shift control error based on the determination result.

At this time, the control unit 90 controls the vehicle so that the vehicle can be maintained in a safe state if the shift control error is detected.

In this case, whether or not a shift control error occurs is determined by an automatic transmission controller (not shown), a speed sensor 60, a solenoid valve 80, and a parking sensor 100 or a parking switch 110 ) May be judged as to whether or not an error occurs.

That is, the control unit 90 includes an automatic transmission controller for performing shift control according to the operation of the shift lever of the driver or for performing an actual shift control in the automatic transmission for safety and convenience, a sensor for sensing the vehicle condition, When an error occurs in the valve 80, it is determined that the shift control error is caused, so that the shift control error can be handled.

Hereinafter, a method for diagnosing a shift control error of the SBW system according to an embodiment of the present invention will be described in detail with reference to FIG. 2 to FIG.

2 is a flowchart illustrating an example of a method for diagnosing a shift control error of an SBW system according to an embodiment of the present invention.

Referring to FIG. 2, the control unit 90 determines whether the shift state according to the automatic shift is the N-step or the P-step, that is, whether the shift state is the neutral state or the parking state (S110).

If it is determined in step S110 that the shift state according to the automatic shift is in the neutral state or the parking state, the controller 90 determines whether there is no shift lever operation (S120).

If it is determined in step S120 that the shift lever has not been operated, that is, the shift state according to the automatic shift is in the neutral state or the parking state at present and the shift lever is not operated by the driver, It is determined whether the shift control is performed, and the shift control error is determined based on the determination result.

In this case, the control unit 90 determines whether the position of the shift lever calculated by the automatic transmission controller is the D- or R-stage, the direction information of the vehicle sensed through the speed sensor 60 is the forward direction or the backward direction, It is determined whether the valve combination is a D-stage or R-stage (S130), and it is determined that a shift control error has occurred based on the determination.

That is, when the shift position calculated by the automatic transmission controller is the D-stage state or the R-stage state when the shift state of the driver or the shift control result of the vehicle, the shift state is presently the neutral state or the parking state, It is determined that an error has occurred in the automatic transmission controller. If the direction information detected by the speed sensor 60 is the forward direction or the backward direction, it is determined that an error has occurred in the speed sensor 60. If the combination of the solenoid valves 80 It can be determined that an error has occurred in the solenoid valve 80 when the valve is in the D-stage state or the R-stage state.

On the other hand, if it is determined in step S130 that a shift control error has occurred, the control unit 90 keeps the shift position at the existing position or the vehicle can be maintained in the safe state.

Further, the controller 90 operates the warning unit 70 to warn the driver that a shift control error has occurred, or turns off the power stage and the drive stage of the solenoid valve 80 so that the vehicle can be maintained in a safe state (S140).

3 is a flowchart showing another example of a shift control error diagnosis method of an SBW system according to an embodiment of the present invention.

3, the control unit 90 senses the direction of movement of the shift lever of the vehicle using the shift lever sensor 20. When the shift direction of the sensed shift lever is determined to be different from the shift direction of the vehicle, It is judged as an error.

That is, the control unit 90 determines whether the direction of movement of the shift lever corresponds to the vehicle forward direction (S210). If the shift direction of the shift lever corresponds to the vehicle forward direction as a result of the determination, It is determined whether the direction of the vehicle detected by the speed sensor 60 is the reverse direction or the combination of the solenoid valves 80 is in the R-step state (S220) It is judged that it has occurred.

In the case where the shift direction of the shift lever corresponds to the vehicle forward direction, the shift lever is moved in the downward direction, so that the driver intends to shift to the D-stage or N-stage.

Therefore, when the shifting direction of the shift lever corresponds to the vehicle forward direction, the control unit 90 determines that an error has occurred in the automatic shift controller when the position of the shift lever calculated by the automatic transmission controller is the R- It is determined that an error has occurred in the speed sensor 60 if the direction information of the vehicle sensed through the sensor 60 is the backward direction. If the solenoid valve combination is in the R-step state, it is determined that an error has occurred in the solenoid valve 80 do.

If it is determined that a shift control error has occurred, the control unit 90 keeps the gear position at the existing position so that the vehicle can be maintained in the safe state, or operates the warning unit 70 to change- A warning can be given to the driver. Alternatively, the control unit 90 may turn off the power supply terminal and the driving terminal of the solenoid valve 80 so that the vehicle can be maintained in a safe state (S250).

If it is determined in step 210 that the direction of movement of the shift lever does not correspond to the vehicle forward direction, the control unit 90 determines whether the direction of movement of the shift lever corresponds to the vehicle backward direction (S230) It is determined whether a shift control error has occurred if the direction of movement of the lever corresponds to the vehicle backward direction.

That is, the control unit 90 determines that the position of the shift lever calculated by the automatic transmission controller is the D-stage, the direction information of the vehicle sensed through the speed sensor 60 is the forward direction, or the combination of the solenoid valves 80 D state (S240), and determines that a shift control error has occurred based on the determination result.

In the case where the shift direction of the shift lever corresponds to the vehicle backward direction, the shift lever is moved in the upward direction, so the driver intends to shift to the R-stage or N-stage.

Therefore, when the shift direction of the shift lever corresponds to the vehicle backward direction, the control unit 90 determines that an error has occurred in the automatic transmission controller if the position of the shift lever calculated by the automatic transmission controller is the D-position, It is determined that an error has occurred in the speed sensor 60 if the direction information of the vehicle sensed through the sensor 60 is the forward direction and if the combination of the solenoid valves 80 is in the D- It is judged that it has occurred.

If it is determined that a shift control error has occurred, the controller 90 keeps the shift position at the existing position or the vehicle can be maintained in the safe state as described above.

Also, the control unit 90 operates the warning unit 70 to warn the driver that a shift control error has occurred, or to turn off the power stage and the driving stage of the solenoid valve 80 so that the vehicle can be maintained in a safe state S250).

4 is a flowchart showing another example of a shift control error diagnosis method of an SBW system according to an embodiment of the present invention.

Referring to FIG. 4, the controller 90 determines whether the vehicle is currently parked or the parking button 40 is operated (S310).

If it is determined in step S310 that the vehicle is currently parked or the parking button 40 is operated, the control unit 90 determines whether a shift control error has occurred in accordance with whether the shift control is a parking control.

That is, the control unit 90 determines whether the shift lever position calculated by the automatic transmission controller is not the P-stage, the solenoid valve combination is not the P-stage state, or the parking mechanism state is not the P-stage state ), It is determined that a shift control error has occurred.

In this case, the controller 90 determines that an error has occurred in the automatic transmission controller if the position of the shift lever calculated by the automatic transmission controller is not the P-stage, and if the solenoid valve combination is not the P- It is determined that an error has occurred in the parking sensor 100 or the parking switch 110 attached to the parking mechanism if the parking mechanism state is not the P-stage state.

If it is determined in step S320 that the shift control error has occurred, the control unit 90 operates the warning unit 70 to warn the driver that the shift control error has occurred, or the solenoid valve 80, (S330) so that the vehicle can be maintained in a safe state by turning off the power supply end and the driving end of the solenoid valve (80).

5 is a flowchart showing another example of a shift control error diagnosis method of the SBW system according to an embodiment of the present invention.

Referring to FIG. 5, the controller 90 senses the vehicle speed through the vehicle speed sensor 50 and determines whether the vehicle is in the ignition off state based on the ignition signal input through the hardware line.

The control unit 90 then determines whether the vehicle speed sensed through the vehicle speed sensor 50 is equal to or higher than the set speed or the vehicle speed in the N-th stage determined by the SBW control logic set at the ignition off time is equal to or higher than the set speed S410). In this case, the control unit 90 determines whether a shift control error has occurred in accordance with whether the shift control is the travel control.

That is, if the vehicle speed is equal to or higher than the set speed or the vehicle speed at the time of ignition off (the vehicle speed in the N-th stage determined by the SBW control logic) is equal to or higher than the set speed, the control unit 90 determines that the shift lever It is determined whether the position of the solenoid valve is the P-stage, the solenoid valve combination is the P-stage state, or the parking mechanism state is the P-stage state (S420).

In this case, when the position of the shift lever calculated by the automatic transmission controller is in the P-th stage, the controller 90 determines that an error has occurred in the automatic transmission controller, and if the solenoid valve combination is in the P- It is determined that an error has occurred in the parking sensor 100 or the parking switch 110 attached to the parking mechanism.

If it is determined in step S420 that a shift control error has occurred, the controller 90 operates the warning unit 70 to warn the driver that the shift control error has occurred, The power stage and the driving stage are controlled to mechanically connect the N stage (S430).

As described above, the apparatus and method for diagnosing the shift control error of the SBW system according to the embodiment of the present invention diagnose the shift control by the driver's intention or the shift control error during the automatic shift control, thereby maintaining the vehicle in a safe state.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

20: Shift lever sensor
30: Actuator sensor
40: Parking button
50: vehicle speed sensor
60: Speed sensor
70: Warning section
80: Solenoid valve
90:
100: Parking sensor
110: parking switch

Claims (16)

Detecting whether or not the automatic shift according to the driver's shift intention or the driving condition;
Determining whether a shift control is performed according to the shift intention or the automatic shift, and determining a shift control error according to a determination result; And
And the control unit controls the vehicle according to the shift control error.
2. The method according to claim 1, wherein, in the step of determining the shift control error,
Wherein the control unit determines that the shift control error is the shift control error when the shift control is determined to be forward or backward control in a state where the position of the gear position is neutral or parked and there is no operation of the shift lever Way.
3. The automatic transmission according to claim 2, wherein the control unit determines that the position of the gear stage calculated by the automatic transmission controller is the D-stage or R-stage, the direction information to be traveled is forward or backward, or the solenoid valve combination for the speed- The shift control error is determined to be the shift control error when the vehicle is in the single-phase or R-phase.
2. The method according to claim 1, wherein, in the step of determining the shift control error,
Wherein the control unit determines that the shift control error occurs if the shift control is determined to be different from the shift direction of the shift lever.
5. The automatic transmission according to claim 4, wherein the control unit determines that the position of the gear position calculated by the automatic transmission controller is R-stage or the direction information to be traveled is the reverse direction in the state where the shift direction of the shift lever corresponds to the forward travel of the vehicle , Or if the solenoid valve combination for the speed change stage control is in the R-step state, the shift control error is determined to be the shift control error.
The automatic transmission according to claim 4, wherein the control unit determines that the shift position calculated by the automatic shift controller is in the D-stage, the direction information to be traveled is the forward direction , Or if the solenoid valve combination for the speed change stage control is in the D-stage state, the shift control error is determined to be the shift control error.
2. The method according to claim 1, wherein, in the step of determining the shift control error,
Wherein the control unit determines that the shift control error is the shift control error when the shift control is not the parking control while the parking condition is satisfied or the position of the gear position is the P position.
8. The shift control apparatus according to claim 7, wherein when the position of the gear stage calculated by the automatic transmission controller is not the P-stage, the solenoid valve combination is not the P-stage state, or the parking mechanism state is not the P- And determining an error as an error.
2. The method according to claim 1, wherein, in the step of determining the shift control error,
The control unit determines that the vehicle speed is equal to or higher than the predetermined speed, or is determined to be in the N-th stage by the shift-by-wire (SBW) control logic when the ignition is off, The shift control error is determined as the shift control error.
10. The shift control apparatus according to claim 9, wherein the control unit determines that the shift control error is an error if the position of the gear position calculated by the automatic transmission controller is P-stage, the solenoid valve combination is P-stage, or the parking mechanism state is P- Wherein the SBW system is a shift control system.
A solenoid valve for shifting the speed change stage; And
It is determined whether or not the automatic shift according to the shift intention or the driving condition of the driver inputted from the shift lever sensor is detected and whether or not the shift is controlled or predetermined shift control according to the automatic shift is performed, And a control unit for controlling the solenoid valve.
The automatic transmission control device according to claim 11, wherein the control unit determines whether the position of the gear stage calculated by the automatic transmission controller is the D-stage or R-stage or the direction in which the vehicle is to be driven in a state where the position of the gear position is neutral or parked, Wherein the shift control error is determined as the shift control error if the information is forward or backward, or the solenoid valve combination for the speed change step control is in the D-step state or the R-step state.
12. The automatic transmission according to claim 11, wherein the control unit determines that the shift position calculated by the automatic transmission controller is at the R-stage or the direction information to be traveled is the reverse direction in the state where the shift direction of the shift lever corresponds to the forward travel of the vehicle , Or if the solenoid valve combination for the speed change stage control is in the R-step state, the shift control error is determined to be the shift control error.
12. The automatic transmission according to claim 11, wherein the control unit determines that the shift position calculated by the automatic transmission controller is the D-stage, the direction information to be traveled is the forward direction , Or if the solenoid valve combination for the speed change stage control is in the D-stage state, the shift control error is determined to be the shift control error.
12. The automatic transmission according to claim 11, wherein the control unit determines that the shift position calculated by the automatic transmission controller is not the P-stage or the solenoid valve combination is in the P-stage state when the parking condition is satisfied or the position of the gear position is the P- Or if the parking mechanism state is not the P-stall state, it is determined as the shift control error.
12. The automatic transmission according to claim 11, wherein, in a state in which the vehicle speed is higher than the set speed, or when the ignition is off, the control unit is determined as N-th stage by SBW (Shift-By- The shift control error is determined as the shift control error when the position of the gear position calculated by the controller is the P-stage, the solenoid valve combination is the P-stage state, or the parking mechanism state is the P-stage state. Device.

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