KR101292511B1 - Emergency controlling method of electronic shift lever - Google Patents

Abstract

According to the present invention, when the communication between the electronic shift lever unit and the transmission control unit (TCU) is poor, the gear is controlled to be converted to the neutral (N) stage. The emergency control method of the electronic shift lever according to the present invention relates to the emergency control method of the electronic shift lever according to the present invention, which determines whether communication between the TCU and the lever control unit included in the electronic shift lever unit is normal. Checking a communication state; And an N-stage conversion step of controlling the transmission so that the TCU positions the gear in the N-stage when it is determined that the communication is bad in the communication state checking step.

Description

Emergency controlling method of electronic shift lever

The present invention relates to an emergency control method of the electronic shift lever, and more particularly, in the case of a communication failure between the electronic shift lever unit and the TCU, the gear is controlled to be converted to the neutral (N) stage, and further, if necessary, The present invention relates to an emergency control method for an electronic shift lever that allows a driver to arbitrarily change a shift stage to enable temporary driving.

Recently developed or mass-produced automobiles are applied with vehicle electronic control technology called Drive by Wire (DbW) in order to receive the driver's intention from various controllers and perform optimized control for driving conditions. .

The DbW system includes a variety of systems that electronically control handles, brakes, throttle openings or shift levers.

DbW technology can be considered as a drawback of the difficulty of implementing a complicated control logic to enable the driver's intention and driving according to each situation and performing a replacement function after troubleshooting. Due to the light weight effect and the optimum control, more and more vehicles are applying this technology.

Among the DbW technologies, the shift lever electronic control technology, commonly referred to as shift by wire (SbW), which is mainly applied to an automatic transmission for luxury cars, is a mechanical connection such as a cable or a link between a mechanical shift lever and a transmission. Instead of the structure, it has electrical connection structure such as electronic shift lever and electric wire.

This is a system that controls various actuators such as gear change (P, R, N, D-range) and manual mode shifting by controlling the driver (motor or electronic valve) by various algorithms of the controller.

The shift lever electronic control technology provides a driver with simpler and more convenient operability, secures flexibility of the packaging space, and can be referred to as a technology having various advantages that can be effectively used to prevent theft by interlocking with an electronic key.

On the other hand, a vehicle to which the shift lever electronic control technology is applied, that is, the electronic shift lever is used, should have a fail-safe for emergency due to the characteristics of the technology.

An example of the shift lever electronic control technology having the fail-safe may be a "Tishyu fail-safe control method using an electronic shift lever" disclosed in Korean Patent Publication No. 10-2011-0062755.

The above-mentioned patent discloses a transmission override unit that performs communication between a transmission control unit (hereinafter referred to as a “TCU”) and an electronic transmission lever unit, and when a fail state occurs on the TCU side, that is, when a communication failure occurs. The technical challenge is to forcibly release the parking insert by pulling the override cable with the electronic shift lever.

In the shift lever electronic control technology, when a communication failure between the electronic shift lever unit and the TCU occurs, it is necessary to provide a driver with a safer and more convenient driving condition in addition to the technical problem to be disclosed by the above-mentioned patent.

In particular, when the communication failure occurs, appropriate control of the transmission by the TCU should be made so as not to cause a problem such as sudden start of the vehicle, and according to the driver's arbitrary operation so that the vehicle can be temporarily driven as needed by the driver. Gear shifting should be possible.

However, in the conventional shift lever electronic control technology, there is a problem that a specific control method for enabling the above emergency control when a communication failure between the electronic shift lever unit and the TCU occurs is not proposed.

The present invention has been made to solve the problems of the above-described conventional shift lever electronic control technology, when a communication failure between the electronic shift lever unit and the TCU occurs, the gear is controlled to be converted to the N stage, and further, to meet the needs of the driver Accordingly, an emergency control method of an electronic shift lever in which gear shifting is performed by a driver's arbitrary operation is provided.

In order to solve the above problems, the emergency control method of the electronic shift lever according to the present invention, the communication state checking step of determining whether the communication between the TCU (Transmission Control Unit) and the lever control unit included in the electronic shift lever unit is normal ; And an N-stage conversion step of controlling the transmission so that the TCU positions the gear in the N-stage when it is determined that the communication is bad in the communication state checking step.

And, in the state in which the gear is controlled to be located in the N-stage according to the N-stage conversion step, the TCU operation mode switch operation check step of confirming the operation of the mode switch included in the electronic shift lever unit; may further include have.

The TCU may further include a shift stage control step of controlling the transmission so that the shift stage of the gear is not changed or changed according to whether the mode switch is confirmed in the mode switch operation check step.

In this case, in the mode switch operation checking step, the mode switch, which is checked by the TCU, may be formed of a first mode switch and a second mode switch.

In the shift stage controlling step, when the TCU receives an on signal from both the first mode switch and the second mode switch in the mode switch operation check step, the TCU ignores the signal. And controlling the transmission to keep the gear at the N stage.

Alternatively, in the shift stage control step, when the TCU receives an on signal from the first mode switch and an off signal from the second mode switch in the mode switch operation check step, The TCU may be configured to control the transmission to position the gear at the D stage.

Alternatively, in the shift stage controlling step, when the TCU receives an off signal from the first mode switch and receives an on signal from the second mode switch in the mode switch operation check step, The TCU may be configured to control the transmission to position the gear at the R stage.

According to the present invention, when the communication between the electronic shift lever unit and the TCU is poor, the driver can be secured by controlling the shift stage to be forcibly converted to the N stage.

In addition, when the mode switch operation check step and the shift stage control step are further included, the shift of the shift stage can be realized by using a mode switch already provided without additional parts for shift stage change. The driver can easily move the vehicle to the safety zone or vehicle repair shop by converting the shift stage to the D stage or the R stage by easily operating the mode switch as needed.

1 is a configuration diagram of a shift lever electronic control system in which an emergency control method of an electronic shift lever according to an embodiment of the present invention can be used;
2 is a flowchart illustrating an emergency control method of an electronic shift lever according to an embodiment of the present invention.

An emergency control method of an electronic shift lever according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a shift lever electronic control system in which an emergency control method of an electronic shift lever according to an embodiment of the present invention can be used, the system comprising an electronic shift lever unit (Electronic Shift Lever Unit) ( 100), a transmission control unit (hereinafter referred to as "TCU") 200, and a transmission (300) is included.

The electronic shift lever unit 100 may include a shift lever 110, a lever control unit 120 for controlling the shift lever 110, and a mode switch 130.

Here, the lever control unit 120 transmits information related to the operation of the shift lever 110, including information about the lever positions (N, D, R, P stages) of the shift lever 110, or receives necessary information. In order to be connected to a control unit, such as TCU 200 to be described later in a communication line to perform a CAN (Controller Area Network) communication or LIN (Local Interconnect Network) communication.

The mode switch refers to various mode switching switches that may be included in the ordinary shift lever unit 100. For example, an economy switch, a power switch, a hold switch, and an O / D (Over Drive) switch, LSS (Low Speed Start) switch, etc.

When the mode switch and the TCU 200 are connected to each other by a wire and the driver turns on the required mode switch, the TCU 200 controls the transmission 300 to perform a function of the corresponding mode switch.

The above-described mode switch, one or more may be provided in the shift lever unit 100. In the illustrated example, an emergency control method of the electronic shift lever according to the present embodiment may be implemented. An example in which two mode switches 130, that is, a first mode switch 131 and a second mode switch 132 are provided.

However, unlike illustrated, three or more mode switches may be provided. This is because the mode switch to be checked in the mode switch operation check step (S400) to be described later may be selected from three or more mode switches provided. This will be described in more detail below.

On the other hand, Figure 2 is a flow chart of the emergency control method of the electronic shift lever according to an embodiment of the present invention.

As shown, the emergency control method of the electronic shift lever according to the present embodiment may include a communication state checking step (S200) and an N-stage conversion step (S300).

In the emergency control method of the electronic shift lever according to the present embodiment, prior to the communication state checking step (S200), the TCU 200 first performs a starting checking step (S100) to check whether the starting is on. can do.

When the start-up (on) state, the next communication state check step (S200) is performed, the communication state check step (S200), the above-described communication state between the lever control unit 120 and the TCU 200 is normal This step is to check the recognition.

When the communication state is confirmed to be normal in the communication state checking step (S200), no special control process is involved in the normal driving operation of the vehicle.

If the communication is not normal, i.e., a communication failure, for example, the above-described failure of the communication line is detected by a separate sensing unit so that the TCU 200 recognizes this or the TCU 200 from the lever control unit 120. If it is recognized that the required signal has not been received, the N-stage conversion step S300 is performed next.

If the communication is poor, since the TCU 200 does not properly recognize accurate information about the lever position of the shift lever 110, the TCU 200 may perform an incorrect control on the transmission 300. This may cause a problem such as sudden start of the vehicle. Therefore, when the communication state failure is confirmed, the TCU 200 performs the N-stage conversion step S300 of controlling the transmission 300 to force the gear to the N-stage.

In the emergency control method of the electronic shift lever according to the present embodiment, in the state where the gear is controlled to be located in the N-stage according to the N-stage converting step (S300), whether or not the TCU 200 operates the above-described mode switch 130. Mode switch operation check step (S400) to check may be further included.

In this case, the mode switch 130 may include, for example, a first mode switch 131 and a second mode switch 132.

Here, the mode switch is composed of the first mode switch and the second mode switch, the mode switch operation check step (S400) means that both of the mode switch is confirmed whether the operation by the TCU (200). One of the two mode switches to be checked is the first mode switch, and the other is the second mode switch.

Therefore, when there are simply two mode switches included in the electronic shift lever unit 100 as shown in FIG. 1, in the mode switch operation check step (S400), the TCU 200 performs the two mode switches 130. The presence or absence of all of them is checked. One of the two is the first mode switch 131 and the other is the second mode switch 132.

And, although not shown, if the mode switch is three or more, in the mode switch operation check step (S400) TCU (200) checks the operation of the two mode switches selected from the three or more mode switches, 2 selected as the confirmation target One of the two mode switches is the first mode switch, and the other is the second mode switch.

Mode switch operation check step (S400), the TCU (200) is to check the presence (on) of the operation (on) of the mode switch 130 to control the transmission 300 so that the function of the present mode of the mode switch 130 is performed. no. In step S400, the TCU 200 determines whether the mode switch 130 is operated as a prerequisite for performing the shift stage control step to be described later.

Therefore, the program designed in the TCU 200 operates in accordance with the operation of the mode switch 130 when the communication state is bad, in addition to the program operated according to the operation of the mode switch 130 when the communication state is normal. The program is further included.

In the emergency control method of the electronic shift lever according to the present embodiment, when the TCU 200 confirms whether the mode switch 130 is operated in the mode switch operation check step (S400), that is, the driver switches the mode switch 130. The TCU 200 receives the ON signal of the mode switch 130 through the above-described wiring, or the driver does not operate the mode switch 130 so that the TCU 200 enters the mode. When the ON signal of the switch 130 is not received, the TCU 200 controls the transmission 300 so that the gear shift stage may or may not be changed according to whether the mode switch 130 is operated. A shift stage control step may be further included.

The shift stage control step is a step in which the driver realizes the shift of the shift stage through an arbitrary operation of the mode switch 130 in a state where the gear is controlled to be positioned in the N-step according to the N-stage conversion step S300.

If this shift is not allowed, the gear will continue to be in N-speed, and if the vehicle needs to be temporarily moved as required by the driver, for example, move the vehicle to a safety zone or move the vehicle to a car repair shop. In this case, the driver has to push the vehicle directly or move the vehicle depending on the tow truck.

Therefore, the emergency control method of the electronic shift lever according to the present embodiment further includes a shift stage control step, and thus, the driver may arbitrarily operate the mode switch 130 when temporary movement of the vehicle is required.

The shift stage control step may be more specifically performed as follows.

In the example in which the mode switch 130 includes the first mode switch 131 and the second mode switch 132 as described above, the shift stage control step may include the first mode switch in the mode switch operation check step (S400). When both the 131 and the second mode switch 132 are confirmed to be in an off state, the TCU 200 controls the transmission 300 to keep the gear in N stages in operation S510. Can be done.

Alternatively, when the first mode switch 131 is in the off state and the second mode switch 132 is in the on state, the TCU 200 moves the gear to the R stage. The control may be performed at step S520.

Alternatively, when the first mode switch 131 is in the on state and the second mode switch 132 is in the off state, the TCU 200 moves the gear to the D stage. In step S530, the control may be performed.

However, when both the first mode switch 131 and the second mode switch 132 are confirmed to be in an on state, the shift stage control step includes a signal received by the TCU 200 from the mode switch 130. Ignoring the step, and controlling the transmission 300 to keep the gear in the N stage as in the case where both the first mode switch 131 and the second mode switch 132 are confirmed to be in an off state. It may be made (S540).

As the shift stage control step (S510, S520, S530, S540) is made in this way, the driver does not operate both the first mode switch 131 and the second mode switch 132 when the forward and backward movement of the vehicle is unnecessary. In other words, it is possible to keep the shift stage continuously at the N stage.

In addition, when forward movement of the vehicle is required, the shift stage may be converted to the D stage by only turning on the first mode switch 131, and when the backward movement of the vehicle is required, only the second mode switch 132 may be used. By turning on, the shift stage can be converted to the R stage.

At this time, when the D stage is converted, the TCU 200 preferably controls the transmission 300 such that the shift stage is shifted from the first stage to the third stage according to the signal magnitude of the accelerator pedal.

At the time of the R stage conversion, if the vehicle is in the forward driving state instead of the stopped state, the gear is R only when the TCU 200 confirms that the vehicle is stopped by the brake operation by the driver. It is preferable to control the transmission 300 to convert to the gear stage.

If the driver accidentally turns on both the first mode switch 131 and the second mode switch 132 even when the vehicle intends to move forward or backward, it is preferable that the shift stage is not changed in this case. The TCU 200 may ignore the signal transmitted from the mode switch 130 and allow the shift stage to continue at the N stage.

The emergency control method of the electronic shift lever according to the present embodiment promotes driver safety by controlling the shift stage to be converted to N stages in case of an emergency in which a communication failure occurs. By shifting the gearshift to D- or R-speed, the vehicle moves forward and backward.

As the present invention can be variously modified by those skilled in the art without departing from the scope of the claims claimed in the claims, the protection scope of the present invention is limited to the specific preferred embodiments described above It doesn't work.

100; Electronic shift lever unit 110; Shift lever
120; Lever control unit 130; Mode switch
131; A first mode switch 132; 2nd mode switch
200; TCU 300; Transmission
S100; Startup check step S200; Check communication status
S300; N stage conversion step S400; Mode switch operation check step
S510, S520, S530, S540; Shift stage control stage

Claims (7)

A communication state checking step of determining whether communication between the control unit (TCU) and the lever control unit included in the electronic shift lever unit is normal;
An N-stage converting step of controlling the transmission so that the TCU positions the gear in the N-stage when it is determined that the communication is defective in the communication state checking step; And
And a mode switch operation checking step of checking whether the TCU operates in a mode switch included in the electronic shift lever unit while the gear is controlled to be positioned at the N stage according to the N stage conversion step. Emergency control method of the electronic shift lever.
delete The method according to claim 1,
And a shift stage controlling step of controlling, by the TCU, the transmission so that the shift stage of the gear is not changed or changed according to whether the mode switch is checked in the mode switch operation checking step. Emergency control method of electronic shift lever.
The method according to claim 3,
In the mode switch operation check step, the operation of the mode switch is confirmed by the TCU, the emergency control method of the electronic shift lever, characterized in that consisting of a first mode switch and a second mode switch.
The method of claim 4,
In the shift stage control step, when the TCU receives an on signal from both the first mode switch and the second mode switch in the mode switch operation check step, the TCU ignores the signal and gears. And controlling the transmission so as to continue at the N-speed stage.
The method of claim 4,
In the shift stage control step, when the TCU receives an on signal from the first mode switch and an off signal from the second mode switch in the mode switch operation check step, the TCU And controlling the transmission so that the gear is positioned at the D stage.
The method of claim 4,
In the shift stage control step, when the TCU receives an off signal from the first mode switch and receives an on signal from the second mode switch in the mode switch operation check step, the TCU And controlling the transmission so that the gear is positioned at the R stage.

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