JP2009222115A - Shift-by-wire type shift controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift-by-wire type shift controller for actualizing shift control to meet the needs of a driver in the condition of frequently moving a vehicle forward and backward. <P>SOLUTION: The shift-by-wire type shift controller comprises a shift operation device, an actuator, and a shift control means. The shift control means has a control means for directing the actuator to change a shift stage into a reverse travel possible one, when shift operation position is operated at a forward travel possible position and actually in a forward traveling condition and the shift operation is performed from the forward travel possible position to a reverse travel possible position during foot brake operation. The shift control means has a control means for directing the actuator to change into a shift stage of a forward travel possible one. Further in the shift-by-wire type shift controller, the shift control means has a control means which directs the actuator to change into the shift stage of the forward travel possible position, when the shift operation position is at the reverse travel possible position and actually in the reverse traveling condition and the shift operation position is operated from the reverse travel possible position to the forward travel possible position during foot brake operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shift-by-wire shift control device, and more particularly to a shift-by-wire shift control device that realizes shift control in accordance with a driver's needs in a situation where a vehicle needs to be frequently moved back and forth.

In a transmission of an automatic transmission mounted on a vehicle, when a driver operates a shift lever of a shift operation device, a manual valve in the transmission is mechanically operated via a shift cable, and the shift of the transmission is changed. Some change the position (also called “shift stage”).
A shift-by-wire shift control device that electrically detects the operation of the shift operation device and changes the gear position of the automatic transmission using an actuator such as a motor is provided for such a transmission device that mechanically changes the shift position. is there.

Japanese Patent No. 2923953 Japanese Patent Laid-Open No. 01-112004 Japanese Utility Model Publication No. 61-82159 Japanese Utility Model Publication No. 03-6162

By the way, in the conventional shift-by-wire type shift control device, in order to protect the transmission, the speed of the transmission is changed from the reverse (also referred to as “R”) range to the drive (also referred to as “D”) while the vehicle is traveling. .) A function has been added that disables shift control from the drive range to the reverse range.
However, depending on the driving state, the driver may request a shift change even when the vehicle is moving.
In other words, an actual operation is, for example, a case where the gear is suddenly decelerated and a shift is changed.
As a result, there is an inconvenience that the function added to the shift-by-wire transmission control device cannot meet the driver's request described above.

  An object of the present invention is to realize a shift-by-wire shift control device that can perform shift control in accordance with a driver's needs in a situation where the vehicle needs to be frequently moved back and forth.

Accordingly, in order to eliminate the above inconvenience, the present invention provides a shift operation device that outputs the shift range position selected by the driver, and a gear stage of the transmission according to the output signal of the shift control means. In a shift-by-wire shift control device including an operating actuator and a shift control means for operating the actuator in accordance with an output signal of the shift operation position, the shift operation position is a position at which the vehicle can be advanced. When the vehicle is actually in the forward state and the vehicle is being braked by the foot brake, the shift operation position can move the vehicle backward from the position where the vehicle can be advanced. When operated to a position, the shift control means is a gear stage capable of causing the actuator to move the gear stage backward. Characterized in that it comprises a control means for instructing to change.
In addition, a shift operation device that outputs the shift range position selected by the driver, an actuator that operates to change the gear position of the transmission according to the output signal of the shift control means, and an output signal of the shift operation position Accordingly, in a shift-by-wire type shift control device comprising a shift control means for operating the actuator, the shift operation position is a position where the vehicle can be moved backward, and the vehicle is actually in the reverse state, and When the vehicle is being braked by a foot brake, when the shift operation position is operated from a position where the vehicle can be moved backward to a position where the vehicle can be moved forward, the shift control is performed. The means includes control means for instructing the actuator to change the gear position to a gear position capable of moving the vehicle forward. And wherein the door.

As described above in detail, according to the present invention, the shift operation device that outputs the shift range position selected by the driver and the shift operation of the transmission according to the output signal of the shift control means are operated. In a shift-by-wire shift control device including an actuator and a shift control means for operating the actuator in accordance with an output signal of the shift operation position, the shift operation position is a position at which the vehicle can be advanced, and the vehicle When the vehicle is actually moving forward and the vehicle is being braked by the foot brake, the shift operation position is changed from a position where the vehicle can be moved forward to a position where the vehicle can be moved backward. In this case, the shift control means controls the actuator to change the gear position to a gear position that can reverse the vehicle. It is provided with means.
Accordingly, in a situation where it is necessary to frequently move the vehicle back and forth, such as parallel parking or garage parking, it is possible to realize quick shift control that meets the needs of the driver.
In addition, a shift operation device that outputs the shift range position selected by the driver, an actuator that operates to change the gear position of the transmission according to the output signal of the shift control means, and an output signal of the shift operation position Accordingly, in the shift-by-wire type shift control device including the shift control means for operating the actuator, the shift operation position is a position at which the vehicle can be moved backward, the vehicle is actually in the retracted state, and the foot When the shift operation position is operated from a position where the vehicle can be moved backward to a position where the vehicle can be advanced when the vehicle is braked by the brake, the shift control means Control means for instructing the actuator to change the gear position to a gear position capable of moving the vehicle forward is provided.
Accordingly, in a situation where it is necessary to frequently move the vehicle back and forth, such as parallel parking or garage parking, it is possible to realize quick shift control that meets the needs of the driver.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 3 show an embodiment of the present invention.
In FIG. 2, reference numeral 1 denotes a shift-by-wire shift control device.
The shift-by-wire shift control device 1 is a shift operation device 2 that outputs a shift range position selected by a driver and an output signal of a transmission, for example, an automatic transmission (“AT”) according to an output signal of a shift control means 5 described later. The actuator (also referred to as “ACT”) 4 that operates to change the gear position of 3 and the shift control means (“shift controller”) that operates the actuator 4 in response to the output signal of the shift operation position. And 5).
The shift operation device 2 is referred to as a shift select operation interface (also referred to as “operator”).
The automatic transmission 3 shifts a transmission gear to change gears. As a shift position, for example, a parking range, a neutral range (also referred to as “N range”), and a reverse range (also referred to as “R range”). Drive range, 3rd speed range, 2nd speed range, low range (also referred to as “L range”), and the like.
The automatic transmission 3 includes the actuator 4 for changing the gear position of the automatic transmission 3.
The actuator 4 includes a motor 6, a manual shift shaft 7, a gear mechanism (not shown), an angle sensor (not shown), and the like.
At this time, the actuator 4 rotates the manual shift shaft 7 with the motor 6 and outputs a rotation angle signal.
That is, the actuator 4 outputs a rotation angle signal which is rotation angle information of the manual shift shaft 7 to the shift control means 5.
As the rotation angle signal, besides the rotation angle information of the manual shift shaft 7, the output shaft of the motor 6 and the rotation angle of the reduction gear can be similarly handled.
The manual shift shaft 7 is a shaft that is connected to a detent member (not shown) in the automatic transmission 3 and rotates to shift the shift position.
Further, a shift (inhibitor) switch (also referred to as “shift (inhibitor) SW”) 8 is provided on the manual shift shaft 7.
The shift (inhibitor) switch 8 rotates in synchronization with the rotation of the manual shift shaft 7 and outputs each shift position signal.
That is, the shift (inhibitor) switch 8 outputs the current shift position signal to the shift control means 5.

Further, there is the shift-by-wire type shift control device 1 that shift-changes the shift position of the automatic transmission 3.
The shift-by-wire transmission control device 1 includes shift control means 5 as shown in FIG.
At this time, the shift control means 5 operates the actuator 4 so as to shift change the shift position of the automatic transmission 3 in accordance with the output signal of the shift operating device 2.
In other words, the shift control means 5 sets a target shift position based on a signal from the shift operating device 2 and controls the actuator 4 to perform a shift change.

The shift operation device 2 outputs a shift request signal PRND requested by the driver by operating an operator such as a lever, and a parking range position corresponding to each shift position of the automatic transmission 3. The driver can manually select a neutral range position, reverse range position, drive range position, third speed range position, second speed range position, low range position, and the like.
In the travel range including the reverse range position and the drive range position, different travel modes such as the M range, the S range, and the H range may be considered.
The shift operation device 2 is connected to the shift control means 5 of the shift-by-wire transmission control device 1.

  Further, the shift-by-wire shift control device 1 has a shift change function that controls the drive of the actuator 4 according to the selection state of the shift operation device 2.

As shown in FIG. 2, a battery 9 is connected to the shift control means 5 of the shift-by-wire transmission control device 1, and vehicle information 10 is input, while a vehicle device 11 is connected.
The vehicle information 10 includes a vehicle speed (also referred to as “SPD”), an ignition pulse (also referred to as “IG PLS”), a stop lamp switch (also referred to as “stop lamp SW”), an ignition switch (“IG”). Also described as “SW”).
The vehicle device 11 includes an automatic transmission controller (also referred to as “AT controller”), a fuel injection controller, a display device (lamp, shift indicator, etc.), a key interlock control system, and the like.

At this time, when the shift operation position is a position where the vehicle can be advanced, the vehicle is actually in the forward movement state, and the vehicle is being braked by a foot brake (not shown), the shift operation position is When the vehicle is operated from a position where the vehicle can be moved forward to a position where the vehicle can be moved backward, the shift control means 5 can cause the actuator 4 to move the shift stage backward. Control means 12 for instructing to change to a different gear position is provided.
Specifically, the requirements for instructing the control means 12 to change the gear position are summarized below.
(1) The shift operation position is a position where the vehicle can be advanced, for example, a D range position,
(2) The vehicle is actually moving forward, that is, the vehicle is moving forward,
(3) When the vehicle is being braked by the foot brake, that is, when the foot brake is ON,
(4) When the shift operation position is operated from a position where the vehicle can be moved forward to a position where the vehicle can be moved backward, that is, at a shift operation position where the vehicle can be moved forward. When there is a request for the R range shift When the above requirements (1) to (4) are all satisfied, the control means 12 changes the gear position of the actuator 4 to the R range. Is a command.
For this reason, in a situation where it is necessary to frequently move the vehicle back and forth, such as in parallel parking or garage storage, it is possible to realize quick shift control in accordance with the driver's needs.

The control means 12 includes a deceleration calculation means 13 for calculating the deceleration of the vehicle and a vehicle speed detection means 14 for detecting the vehicle speed. The vehicle speed detected by the vehicle speed detection means 14 is preset. A change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the set speed and the deceleration calculated by the deceleration calculating means 13.
That is, as shown in FIG. 2, the control means 12 includes a deceleration calculation means 13 for calculating the deceleration of the vehicle and a vehicle speed detection means 14 for detecting the vehicle speed.
Then, the control means 12 determines whether the actual vehicle speed (also referred to as “current vehicle speed”) detected by the vehicle speed detection means 14 is a preset permitted speed and the shift permission vehicle speed and the deceleration calculation means 13. A change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the relaxation gain K that is the calculated deceleration.
For this reason, since the permitted vehicle speed is changed according to the deceleration of the vehicle, the gap between the permitted vehicle speed and the driver's needs can be reduced.
At this time, the shift permission vehicle speed is set to 10 km / h, for example.
Further, the relaxation gain K is set to a number that increases as the acceleration / deceleration increases.
That is, the calculated permitted speed is set to increase as the deceleration increases.
For this reason, it is possible to improve the calculation accuracy of the permission vehicle speed.

The shift control means 5 includes the control means 12 having the following functions.
In other words, the control means 12 has a shift operation position when the shift operation position is a position where the vehicle can be moved backward, the vehicle is actually in the reverse movement state, and the vehicle is being braked by the foot brake. However, when the vehicle is operated from a position where the vehicle can be moved backward to a position where the vehicle can be moved forward, the gear position is changed to a gear position where the actuator 4 can move the vehicle forward. To do.
Specifically, the requirements for instructing the control means 12 to change the gear position are summarized below.
(1) The shift operation position is a position where the vehicle can be moved backward, for example, an R range position,
(2) The vehicle is actually moving backward, that is, the vehicle is moving backward,
(3) When the vehicle is being braked by the foot brake, that is, when the foot brake is ON,
(4) When the shift operation position is operated from a position where the vehicle can be moved backward to a position where the vehicle can be moved forward, that is, in the shift operation position where the vehicle can be moved backward. When there is a request for D range shift When the above requirements (1) to (4) are all satisfied, the control means 12 changes the gear position of the actuator 4 to the D range. Is a command.
For this reason, in a situation where it is necessary to frequently move the vehicle back and forth, such as in parallel parking or garage storage, it is possible to realize quick shift control in accordance with the driver's needs.

The control means 12 includes an acceleration calculation means 15 for calculating the acceleration of the vehicle and the vehicle speed detection means 14 for detecting the vehicle speed, and the vehicle speed detected by the vehicle speed detection means 14 is set in advance. A change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the set speed and the acceleration calculated by the acceleration calculating means 15.
That is, as shown in FIG. 2, the control means 12 includes an acceleration calculation means 15 for calculating the acceleration of the vehicle and a vehicle speed detection means 14 for detecting the vehicle speed.
The acceleration calculating means 15 represents the degree of deceleration of the reverse speed of the vehicle and is based on the vehicle traveling direction, so the term “acceleration” is used.
The control unit 12 calculates the actual vehicle speed (also referred to as “current vehicle speed”) detected by the vehicle speed detection unit 14 from the shift permission vehicle speed that is a preset set speed and the acceleration calculation unit 15. The change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the relaxation gain K that is the acceleration that has been performed.
For this reason, since the permitted vehicle speed is changed according to the acceleration of the vehicle, the gap between the permitted vehicle speed and the driver's needs can be reduced.
If it adds, the said shift permission vehicle speed will be set, for example to 10 km / h similarly to the case of the said deceleration calculation means 13 mentioned above.
Further, the relaxation gain K is set to a number that increases as the acceleration / deceleration increases.
That is, the calculated permitted speed is set so as to increase as the acceleration increases.
For this reason, it is possible to improve the calculation accuracy of the permission vehicle speed.

  Next, the operation of the operation from the D range to the R range will be described with reference to the control flowchart of the shift-by-wire shift control device 1 of FIG.

When the control program of the shift-by-wire transmission control device 1 is started (101), the control means 12 is a position where the shift operation position can advance the vehicle, for example, the D range position, and the vehicle is actually To (102) whether the vehicle is moving forward, that is, whether the vehicle is moving forward.
If this determination (102) is YES (also described as symbol “Y”), the process proceeds to determination (103) as to whether or not an R range shift has been requested at the shift operation position where the vehicle can be moved forward. To do.
Further, when the above-described determination (102) is NO (also described as “N”), the process proceeds to the control program end (109) described later.

Further, in the determination (103) of whether or not there is a request for the R range shift at the shift operation position where the vehicle can be moved forward, if this determination (103) is YES, the vehicle is braked by the foot brake. Shifts to the determination (104) of whether or not the foot brake is ON.
If the determination (103) is NO, the process proceeds to the end (109) of the control program.

Further, in the determination (104) of whether or not the vehicle is being braked by the above-described foot brake, that is, whether or not the foot brake is ON, if this determination (104) is YES, the deceleration The process proceeds to the process (105) for calculating the shift permission vehicle speed and the relaxation gain K from the calculation and deceleration.
If the determination (104) is NO, the process proceeds to the end (109) of the control program.

After the calculation of the deceleration and the process (105) for calculating the shift permission vehicle speed and the relaxation gain K from the deceleration, the current vehicle speed is smaller than the product of the shift permission vehicle speed and the relaxation gain K.
Current vehicle speed <Shift permission vehicle speed X Relaxation gain K
The process proceeds to judgment (106) on whether or not the above is satisfied.
If this determination (106) is YES, the control means 12 commands to change the gear position, that is, shifts to shift change control execution processing (107), and then ends the control program end (109). ).
If the determination (106) is NO, the control means 12 does not change the gear position, that is, shifts to the shift change control prohibition process (108), and then the control program end (109). Transition.
In the shift change control prohibition process (108), an alarm is also sounded.

  Further, the operation of the operation from the R range to the D range will be described with reference to the control flowchart of the shift-by-wire shift control device 1 in FIG.

When the control program of the shift-by-wire transmission control device 1 is started (201), the control means 12 is in a position where the shift operation position can retreat the vehicle, for example, the R range position, and the vehicle is actually The process proceeds to the determination (202) of whether or not the vehicle is moving backward, that is, whether the vehicle is moving backward.
If this determination (202) is YES (also described as symbol “Y”), the process proceeds to determination (203) as to whether or not there has been a request for D-range shift at the shift operation position where the vehicle can be moved backward. To do.
If the above-mentioned determination (202) is NO (also described as symbol “N”), the process proceeds to the control program end (209) described later.

Further, in the determination (203) of whether or not there is a request for the D range shift at the shift operation position where the vehicle can be moved backward, if this determination (203) is YES, the vehicle is braked by the foot brake. Shifts to the determination (204) of whether or not the foot brake is ON.
If the determination (203) is NO, the process directly proceeds to the end (209) of the control program.

Further, in the determination (204) of whether or not the vehicle is being braked by the above-described foot brake, that is, whether or not the foot brake is turned on, if this determination (204) is YES, the acceleration is calculated. Then, the process proceeds to a process (205) for calculating the shift permission vehicle speed and the relaxation gain K from the acceleration.
If the determination (204) is NO, the process proceeds to the control program end (209).

After executing the calculation of acceleration and the process (205) for calculating the shift permission vehicle speed and the relaxation gain K from the acceleration, the absolute value of the current vehicle speed is smaller than the product of the shift permission vehicle speed and the relaxation gain K, that is,
｜ Current vehicle speed | <Shift permission vehicle speed X Relaxation gain K
The process proceeds to judgment (206) on whether or not the above is satisfied.
If the determination (206) is YES, the control means 12 commands to change the gear position, that is, shifts to the shift change control execution process (207), and then the control program end (209). ).
If the determination (206) is NO, the control means 12 does not change the gear position, that is, shifts to the shift change control prohibition process (208), and then the control program end (209). Transition.
In the shift change control prohibition process (208), an alarm is also sounded.

Thus, the shift operation device 2 that outputs the shift range position selected by the driver, the actuator 4 that operates to change the gear position of the automatic transmission 3 in accordance with the output signal of the shift control means 5, and the shift In a shift-by-wire type shift control device 1 having a shift control means 5 for operating the actuator 4 in accordance with an output signal of an operation position, the shift operation position is a position where the vehicle can be advanced, and the vehicle When the vehicle is actually in the forward state and the vehicle is being braked by the foot brake, the shift operation position changes from a position where the vehicle can be advanced to a position where the vehicle can be moved backward. When operated, the shift control means 5 causes the actuator 4 to change the gear position to a gear position capable of moving the vehicle backward. And a Ryosuru control unit 12.
Accordingly, in a situation where it is necessary to frequently move the vehicle back and forth, such as parallel parking or garage parking, it is possible to realize quick shift control that meets the needs of the driver.

The control means 12 includes a deceleration calculation means 13 for calculating the deceleration of the vehicle and a vehicle speed detection means 14 for detecting the vehicle speed. The vehicle speed detected by the vehicle speed detection means 14 is preset. The change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the set speed and the deceleration calculated by the deceleration calculation means 13.
Therefore, since the permitted vehicle speed is changed according to the deceleration of the vehicle, the gap between the permitted vehicle speed and the driver's needs can be reduced.

Furthermore, the permitted vehicle speed is set to increase as the deceleration increases.
Therefore, it is possible to improve the calculation accuracy of the permitted vehicle speed.

Furthermore, a shift operating device 2 that outputs the shift range position selected by the driver, an actuator 4 that operates to change the gear position of the automatic transmission 3 in accordance with the output signal of the shift control means 5, and a shift In the shift-by-wire type shift control device 1 including the shift control means 5 that operates the actuator 4 in accordance with the output signal of the operation position, the shift operation position is a position where the vehicle can be moved backward, and the vehicle When the vehicle is actually in a reverse state and the vehicle is being braked by a foot brake, the shift operation position changes from a position where the vehicle can be moved backward to a position where the vehicle can be advanced. When operated, the shift control means 5 instructs the actuator 4 to change the gear position to a gear position that can advance the vehicle. And a control means 12 for.
Accordingly, in a situation where it is necessary to frequently move the vehicle back and forth, such as parallel parking or garage parking, it is possible to realize quick shift control that meets the needs of the driver.

The control means 12 includes an acceleration calculation means 15 for calculating the acceleration of the vehicle and a vehicle speed detection means 14 for detecting the vehicle speed, and the vehicle speed detected by the vehicle speed detection means 14 is preset. A change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the set speed and the acceleration calculated from the acceleration calculating means 15.
Therefore, since the permitted vehicle speed is changed according to the acceleration of the vehicle, the gap between the permitted vehicle speed and the driver's needs can be reduced.

It is a flowchart for control about operation from D range to R range of the shift-by-wire type shift control apparatus which shows the Example of this invention. It is a system diagram of a shift-by-wire type shift control device. It is a flowchart for control about operation from R range to D range of a shift-by-wire type transmission control apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shift-by-wire type transmission control apparatus 2 Shift operation apparatus 3 Transmission, for example, automatic transmission (it is also called "AT").
4 Actuator (also referred to as “ACT”)
5 Shift control means (also referred to as “shift controller”)
6 Motor 7 Manual shift shaft 8 Shift (inhibitor) switch 9 Battery 10 Vehicle information 11 Vehicle device 12 Control means 13 Deceleration calculation means 14 Vehicle speed detection means 15 Acceleration calculation means

Claims (5)

  A shift operation device that outputs the shift range position selected by the driver, an actuator that operates to change the gear position of the transmission according to an output signal of the shift control means, and an output signal of the shift operation position A shift-by-wire shift control device comprising a shift control means for operating the actuator, wherein the shift operation position is a position where the vehicle can be advanced, the vehicle is actually in the forward movement state, and the foot brake If the shift operation position is operated from a position where the vehicle can be moved forward to a position where the vehicle can be moved backward when the vehicle is braked by the shift control means, And a control means for instructing the actuator to change the gear position to a gear position capable of moving the vehicle backward. Shift-by-wire shift control device according to symptoms.   The control means includes a deceleration calculation means for calculating a vehicle deceleration, and a vehicle speed detection means for detecting the vehicle speed. The vehicle speed detected by the vehicle speed detection means is set to a preset set speed and the vehicle speed detection means. 2. The shift-by-wire shift control device according to claim 1, wherein a change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the deceleration calculated from the deceleration calculating means.   The shift-by-wire shift control device according to claim 2, wherein the permitted vehicle speed is set so as to increase as the deceleration increases.   A shift operation device that outputs the shift range position selected by the driver, an actuator that operates to change the gear position of the transmission according to an output signal of the shift control means, and an output signal of the shift operation position And a shift-by-wire shift control device comprising a shift control means for operating the actuator, wherein the shift operation position is a position where the vehicle can be moved backward, the vehicle is actually in a reverse state, and the foot brake If the shift operation position is operated from a position where the vehicle can be moved backward to a position where the vehicle can be advanced when the vehicle is braked by the shift control means, And a control means for instructing the actuator to change the gear position to a gear position capable of moving the vehicle forward. Shift-by-wire shift control device according to symptoms.   The control means includes acceleration calculation means for calculating the acceleration of the vehicle and vehicle speed detection means for detecting the vehicle speed. The vehicle speed detected by the vehicle speed detection means is a preset set speed and the acceleration calculation. 2. The shift-by-wire shift control device according to claim 1, wherein a change command is output when the vehicle speed is less than the permitted vehicle speed calculated using the acceleration calculated from the means.

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