JP2003194212A - Gear shift controller for transmission and desired position setting device during shift operation for gear shift member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately shift a shift stage in a mechanical transmission by correctly detecting the position at each shift stage of a sliding lever. <P>SOLUTION: This device is provided with a plurality of shift rails 35a-35d, the sliding lever 40a which is arranged movably in a shift direction and a select direction and moves shift rails in the shift direction, motors 32a, 32b moving the sliding lever 40a in the shift direction and select direction, and control means 41a controlling the motors 32a, 32b according to a gear shift command. The control means 41a is provided with center position detecting means 41c detecting the center position of the gear shift member corresponding to each shift stage, and correcting means 41d updating the set position memorized in memory means 41b to the center position detected by the center position detecting means 41c. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission gear shift control device and a gear shift operation target position setting device for a gear shift operation member, which are suitable for controlling a gear shift unit that performs a gear shift operation of a mechanical transmission.

[0002]

2. Description of the Related Art As a transmission for an automobile, a transmission gear mechanism and a clutch mechanism similar to those of a manual vehicle, an actuator (gear shift unit) for driving the transmission gear mechanism, and an actuator (clutch control unit) for driving the clutch mechanism. , A mechanical automatic transmission that has an electronic control unit (ECU) that controls each of these actuators according to the driver's gear shifting operation or the vehicle's running state has been developed, and is mainly used for large vehicles such as trucks and buses. Has been applied to.

By the way, in a mechanical transmission, a plurality of shift rails are provided, a shift fork for engaging a shift gear corresponding to each shift stage is coupled to each shift rail, and a sliding lever (shift operation member, A shift block, which can be engaged with a shift finger), is coupled, and the sliding lever is moved in the select direction to engage with one of the shift blocks of the plurality of shift rails. Further, by moving the sliding lever in the shift direction, the shift rail is moved in the axial direction together with the shift block to drive the shift fork, so that the shift gears of a required combination are meshed.

In the case of a mechanical automatic transmission, the sliding lever is driven by an actuator. In this case, it is necessary to drive the sliding lever to an appropriate position while detecting the position of the sliding lever. The actuators that drive the sliding lever include hydraulic type and hydraulic type such as hydraulic pressure and electric type. In the case of the electric type actuator, the sliding lever can be driven more accurately than the hydraulic type actuator. Therefore, it is necessary to accurately detect the position of the sliding lever.

Generally, the position sensor detects the position of the sliding lever (the position in the select direction and the position in the shift direction), and the sliding lever is driven based on the detected information. For example, as shown in FIG. 8, in the select direction, the output voltage value of the position sensor increases as the sliding lever position moves from the left side to the right side in the drawing, and in the shift direction, the sliding lever position moves from the lower side to the upper side in the drawing. The output voltage value of the position sensor increases as it goes. Thereby, the sliding lever position can be determined from the output voltage value of the position sensor.

Therefore, by conducting a test in advance, actual measured values of the output voltage value of the position sensor at each position of the sliding lever in the select direction and each position of the shift direction are obtained, and the actual output voltage at each position in each direction is obtained. The value is set as the target voltage value at each position, and each target voltage value is initially stored in the control program. When changing gears, press E
In the CU (electronic control unit), the sliding lever is driven in the select direction and the shift direction so that the output voltage value of the position sensor becomes the stored target voltage value, and the required transmission gear is engaged. The position sensor is connected so that the output power source of the ECU is used as a power source.

In the example shown in FIG. 8, sliding
The target voltage value at the lever select position is R (rear
V) at position 1)₁₁, 2 (2
V) at the 3rd and 3rd positions₁₂(However, V₁₁<
V₁₂), And on the right next to 4 (4th) and 5 (5th)
Is V₁₃(However, V₁₂<V₁₃) And 6 (6
Speed) V ₁₄(However, V₁₃<V₁₄). Well
Also, the target voltage at the sliding lever shift position
Values are 1 (1st speed), 3 (3rd speed), 5 (5th speed) positions
V_{twenty one}, V in neutral position_{twenty two}(However, V_{twenty one}<V_{twenty two}), R
(Reverse), 2 (2nd speed), 4 (4th speed), 6 (6th speed) positions
Then V_{twenty three}(However, V_{twenty two}<V_{twenty three}).

[0008]

However, after the shift control device is mounted on the vehicle, there may be a difference between the target voltage value and the actual voltage value at each position of the sliding lever. It may not be done to. That is, when the power supply voltage of the position sensor changes due to ECU replacement after the gear change control device is mounted on the vehicle, the output voltage value of the position sensor itself may change. When assembled, the sliding lever position itself may deviate. In such a case, a shift may occur between the target voltage value and the output voltage value of the position sensor, and there is a possibility that gear shifting may not be performed properly.

By the way, in Japanese Patent Laid-Open No. 6-235458, the relationship between the sliding lever position and the shift block position when each shift block is in a neutral state is detected, and each shift rail is based on this detection result. Techniques for calibrating the position (position in the select direction) and the neutral position (position in the shift direction) are disclosed. However, when the power supply voltage of the position sensor changes or when the transmission is reassembled, there is a difference between the target voltage value and the output voltage value of the position sensor for each shift block in various shift positions. Therefore, as in the technique of the above publication, each shift rail position (selection direction position) or neutral position is determined based on only the relationship between the sliding lever position and the shift block position when each shift block is in the neutral state. Position (shift direction position)
Even if the calibration is performed, it is not possible to eliminate all the deviation between the target voltage value and the output voltage value of the position sensor.

The present invention has been devised in view of such a problem, and switches the shift stage by accurately detecting the shift direction position and the select direction position of each of the sliding levers (shift operation members) at each shift stage. An object of the present invention is to provide a gear shift control device for a transmission and a target position setting device for gear shift operation of a gear shift operation member, which are capable of appropriately performing the above.

[0011]

In order to achieve the above-mentioned object, a shift control device for a transmission according to the present invention has a plurality of shift rails for actuating a gear shift mechanism of the transmission and an axial direction of the shift rails. The shift rail is disposed so as to be movable in a certain shift direction and a select direction orthogonal to the shift direction, and when moving in the shift direction, the shift rail is engaged with any one of the shift rails. A shift operation member for moving the shift operation member in the shift direction, an electric drive means for moving the shift operation member in the shift direction and the select direction by an electric driving force, and the shift operation member in response to a shift command. Therefore, in a shift control device for a transmission, which includes a control means for controlling the operation of the electric drive means, the control means detects the position of the shift operation member. Work member position detection means, storage means for storing the set position of the speed change operation member corresponding to each speed change step, and the speed change operation member set for the speed change step corresponding to the speed change command according to the speed change command. Movement command means for instructing to move to a value, central position detection means for detecting the central position of the speed change operation member corresponding to the shift speed,
Correction means for updating the set position stored in the storage means to the central position detected by the central position detecting means. As a result, the center position of the gear shift operation member is updated to an appropriate position.

The gear shift operation member is configured to engage with the shift rail side engaging portion with a required play in the shift direction and / or the select direction, and the central position is the above-mentioned. It is preferable that the play amount is equal in the front-rear direction or the left-right direction. The central position detecting means outputs position information of the shift operating member from the operating member position detecting means when the shift operating member is located at both ends in the front-rear direction or the left-right direction with respect to the engaging portion on the shift rail side. Then, it is preferable to set the midpoint positions of the both ends to the central position.

In addition, the target position setting device for gear shift operation of the gear shift operation member of the present invention has a plurality of shift rails for operating the gear shift mechanism of the transmission, and the electric drive force from the electric drive means. The shift rail is arranged so as to be movable in a shift direction which is an axial direction and a select direction which is orthogonal to the shift direction, and engages with any one of the shift rails when moving in the shift direction. A shift operation member for moving the one shift rail in the shift direction, a select center detecting means for detecting a center position of the shift operation member in the select direction when a predetermined shift speed is achieved, and a shift center when the shift speed is achieved. Shift center detecting means for detecting the shift direction central position of the shift operating member, and the select detected by the select central detecting means. It is characterized by setting a speed change operation at the target position of the shift operating member in the shift stage based on the shift center position detected by the central position and the shift central detection unit. As a result, the central position in the select direction and the central position in the shift direction of the shift operation member are updated to appropriate ones.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. An embodiment of the present invention will be described with reference to the drawings. 1 to 7 are views for explaining a gear shift control device for a transmission and a gear shift operation target position setting device for a gear shift operation member according to an embodiment of the present invention, and FIG. FIG. 2 is a diagram showing a drive system of a vehicle equipped with a mechanical automatic transmission according to an embodiment of the present invention, FIG. 3 is a diagram illustrating a gear shift unit according to the present control circuit structure, and FIG. 4 is a main control. FIG. 5 is a diagram illustrating a clutch control unit according to a circuit structure, FIG. 5 is a schematic perspective view showing an essential part of the gear shift unit, and FIG. 6 is an operation of an essential part of the gear shift unit (sliding lever as a gear shift operation member). FIG. 7 is a schematic diagram showing the central position updating logic.

First, as shown in FIG. 2, the mechanical automatic transmission according to the present embodiment is attached to an engine 1 mounted on an automobile (here, a truck having a cab on a chassis). A clutch mechanism attached to the output part of the engine 1 and having a friction clutch (simply referred to as a clutch)
2 and a mechanical automatic transmission main body 3 connected to the output portion of the engine 1 via the clutch mechanism 2.

The clutch mechanism 2 is adapted to be connected and disconnected by a clutch control unit (clutch booster) 21 as a clutch actuator. The clutch control unit 21 is, as shown in FIG.
An electric pump 22 is provided, and fluid pressure (here, hydraulic pressure) generated by the electric pump 22 is supplied to a master cylinder or a slave cylinder (not shown) via the control valve 21a to drive the clutch mechanism 2 to connect and disconnect. ing. The control valve 21a is driven through the electromagnetic switching valve 21b. The hydraulic pressure is supplied from the hydraulic oil tank 21c and adjusted to a predetermined pressure by the control valve 21d.

The transmission main body 3 is adapted to be operated by a gear shift unit (GSU) 31 as a gear shift actuator. For example, as shown in FIG. 3, the gear shift unit 31 includes an electric motor 32a that drives a sliding lever (not shown in FIG. 3) as a gear shift member (shift operation member) in the select direction, and a gear shift member in the shift direction. Electric motor 32b to drive (hereinafter, reference numeral 3 without distinguishing both electric motors
2), and is configured as an electric actuator (electric drive means).

During a gear shift operation, a gear shift control function (hereinafter referred to as control means) 41a in the ECU 41 is provided.
However, based on the detection information of the select direction position sensor 50a and the shift direction position sensor 50b, the electric motor 32 drives the sliding lever (shift operation member) 40 to each target position (set position) in the select direction and the shift direction. By shifting the meshing state of the gear mechanism of the transmission main body 3, the shift stage is shift-driven to a desired state (see FIG. 1). Details of the operation of the sliding lever 40 will be described later.

The engine 1 is controlled by an engine electronic control unit (engine ECU) 42, and the clutch control unit 21 and the gear shift unit 31 are controlled by a transmission electronic control unit (transmission ECU) 41 which is a control unit for the transmission. It is designed to be controlled through electric signals. Further, the mechanical automatic transmission transmits a shift command (shift command) of a shift stage manually operated by a driver to the clutch control unit 21 and the gear shift unit 31 as an electric signal to transmit the clutch control unit 21 and the gear shift unit 31. The electric signal is a manual shift mode in which the gear is remotely operated, and a shift command (shift command) that is output when the gear shift is required to achieve the optimum gear according to the running state of the vehicle (for example, vehicle speed or engine load). As a result, by using this signal, the clutch control unit 21 and the gear shift unit 31
The automatic shift mode for controlling the operation of is selected and executed.

Therefore, the transmission ECU 41 has a function of performing manual shift control by remote operation in the manual shift mode (remote operation control unit for manual shift), and clutch disengagement operation, gear shift operation and clutch engagement operation in the automatic shift mode. And a function of controlling automatic shift control (remote operation control unit for automatic shift). Transmission ECU4
1, a change lever unit 5 functioning as a shift operation means and a manual / automatic selection operation means 5, a vehicle speed sensor (vehicle speed detection means) 51 for detecting the vehicle speed of the vehicle, and a clutch stroke sensor (shown in the figure) built in the clutch control unit. (Omitted), a clutch switch 53 for detecting the depression of the clutch pedal 6, a transmission gear sensor (not shown) for detecting the shift stage of the transmission main body 3, and a clutch rotation speed (that is, the output side rotation speed of the clutch mechanism 2) are detected. ON when the clutch rotation speed sensor (clutch output rotation speed detection means) 54 and the brake pedal 7 are depressed.
Stop lamp switch that detects the operation of the brake (including the type that detects the brake air pressure) 56,
An engine ECU 42, an emergency switch (not shown), an indicator 60, a parking brake switch 59, a key switch 62, etc. are connected to each other.

Further, the engine ECU 42 includes a key switch 62, a vehicle speed sensor 51, an accelerator depression amount sensor 5
7, an engine speed sensor 58, a transmission ECU 41, an exhaust brake system 61, etc. are connected to each other. The accelerator depression amount sensor 57 is attached to the accelerator pedal 8. When the manual shift mode is selected through the change lever unit 5, the transmission ECU
Via the remote control unit for manual shifting provided in 41,
Based on a command from the change lever unit 5, only the gear shift unit 31 or the gear shift unit 3
1 and the clutch control unit 21 are remotely operated.

That is, in the remote control unit for manual shifting,
In the manual shift mode, only by manually operating the change lever 5A of the change lever unit 5, the gear shift unit 31 and the clutch control unit 21 are remotely operated to drive the main part of the transmission main body 3 and the clutch mechanism 2. It controls the operation of clutch disengagement, gear change, and clutch engagement.

Further, when the automatic shift mode is selected through the change lever 5A, the automatic shift mode is executed. In the automatic shift mode, the gear shift unit 31 is based on various information via the remote control unit for automatic shift provided in the transmission ECU 41.
The clutch control unit 21 is remotely operated, and the engine ECU 42 controls the engine 1 based on various information.

As shown in FIG. 2, the gear shift unit 31 is provided with a gear shift driver circuit 33 for driving the electric motor 32 and the like, and the clutch control unit 21 is driven with the electric pump 22 and the like. A clutch control driver circuit 23 is provided for this purpose.
Here, details of the sliding lever that controls the gear shift (shift operation) will be described.

As shown in FIG. 5, the mechanical transmission is provided with a plurality of shift rails 35a to 35d, and each shift rail 35a to 35d is provided with a shift fork (shown in the figure) for engaging a shift gear corresponding to each shift stage. Not shown) is coupled, and shift blocks (jaws) 36a to 36d with which a sliding lever (also referred to as a gear shift operation member or shift finger) 40 can be engaged are coupled.

Here, the transmission gears are set to R (reverse) and 1
In order to set (first speed), a shift rail 35a equipped with a shift block 36a is provided, and the shift gear is set to 2
In order to set (2nd speed) and 3 (3rd speed), a shift rail 35b equipped with a shift block 36b is provided, and in order to set the transmission gears to 4 (4th speed) and 5 (5th speed), Shift rail 3 equipped with block 36c
A shift rail 3 equipped with a shift block 36d for setting the transmission gear to 6 (sixth speed)
5d is provided.

Each shift rail 35a to 35d is provided with a detent mechanism 38 for holding each shift rail 35a to 35d at the neutral position or each gear position. Each detent mechanism 38 includes annular grooves 37a, 37 formed on the outer circumference of each shift rail 35a-35d.
b, 37c and these annular grooves 37a, 37b, 37c
And a ball 38a that can be fitted into any of the
and a spring 38b that urges a toward the corresponding shift rails 35a to 35d.

The annular grooves 37a and 37b are formed on the shift rails 35a to 35d, and the annular groove 37c is formed on the shift rails 35a to 35c except the shift rail 35d. When the ball 38a is fitted into the annular groove 37a by the detent mechanism 38, each shift rail 3
5a to 35d are held in the neutral position, and when the ball 38a is fitted into the annular groove 37b, the shift rails 35a to 35d are respectively.
Is held in the forward drive position, and when the ball 38a is fitted into the annular groove 37c, the shift rails 35a to 35c are held in the reverse drive position.

The sliding lever 40 has an engaging portion 40a at the tip thereof fitted into one of the recesses 39a to 39d of the shift blocks 36a to 36d of the shift rails 35a to 35d (in FIG. 5, for convenience, the sliding lever is shown). 40 is shown by being offset upwards), and the sliding lever 40 moves in the orthogonal direction (select direction, XX direction in the drawing) with respect to the axial direction (shift direction, YY direction in the drawing) of the shift rails 35a to 35c. When moved, it can engage with the recess of any one of the shift blocks 36a-36d. In addition, sliding lever 4
When 0 moves in the shift direction, sliding lever 40
Engages with the recess of any one of the shift blocks 36a to 36d, and moves any one of the shift rails 35a to 35d engaged with the shift block forward or backward. ing.

Unless the shift rails 35a to 35d are driven by the sliding lever 40, the balls 38a are held in the neutral position fitted in the annular groove 37a, and the shift rails 35a to 35d driven by the sliding lever 40 are , The ball 38 in the forward position depending on the position moved by the drive
a is fitted in the annular groove 37b and is held at this forward position,
At the rear position, the ball 38a is fitted in the annular groove 37c and is held at this reverse position.

For example, if the shift lever 35a is moved to the forward position by the sliding lever 40, the ball 3
8a is fitted in the annular groove 37b to hold the forward position,
The transmission gear is set to R (reverse) and the shift rail 35
When a is set to the reverse position, the ball 38a moves into the annular groove 37c.
To hold the reverse position and the transmission gear is set to 1 (1
Speed).

When the shift rail 35b is moved to the forward position by the sliding lever 40, the ball 38
a is fitted in the annular groove 37b to maintain this forward movement position, the transmission gear is set to 2 (2nd speed), and the shift rail 35b
Is set to the reverse position, the ball 38a is fitted into the annular groove 37c to maintain the reverse position, and the speed change gear is set to 3 (3rd speed).
Is set to.

When the shift rail 35c is moved to the forward position by the sliding lever 40, the ball 38
a is fitted in the annular groove 37b to maintain this forward movement position, the transmission gear is set to 4 (4th speed), and the shift rail 35c
Is set to the reverse position, the ball 38a is fitted into the annular groove 37c to maintain the reverse position, and the speed change gear is set to 5 (5th speed).
Is set to.

Further, if the sliding lever 40 moves the shift rail 35d to the forward position, the ball 3
8a is fitted in the annular groove 37b to hold the forward position,
The transmission gear is set to 6 (6th speed). Thus, the shift speed is set according to the sliding lever 40. However, when the sliding lever 40 is set to the target position, the engaging portion 40a at the tip of the sliding lever 40 is set.
And the shift direction inner wall surfaces 39af-39 of the recesses 39a-39d of the shift blocks 36a-36d engaged with the shift blocks 36a-36d.
Between the df and 39ar to 39dr, play Caf to Cdf and Car to Cdr in the shift direction as shown in FIG.
Is formed.

Each of these plays Caf-Cdf, Car-
If Cdr is greater than 0, the engaging portion 40a at the tip of the sliding lever 40 set at the target position is the inner wall surface 39af-39df, 39ar-39dr of the recess 39a-39d of each shift block 36a-36d.
Each of the shift rails 35a to 35d does not interfere with
Is held in the required position by the detent mechanism 38,
The required gear is achieved.

However, the play Caf to Cdf, Car to C
When any of dr becomes 0 or less, the engaging portion 40a at the tip of the sliding lever 40 set at the target position is the recess 39a-3 of the shift blocks 36a-36d at that portion.
9d shift direction inner wall surface 39af to 39df, 39ar
To 39dr, the detent mechanism 38 cannot be effectively operated, and the shift rail 35a driven by the sliding lever 40 is operated.
The 35d may not be held in the required position, and the required gear may not be achieved.

Further, the engaging portion 40a at the tip of the sliding lever 40 and the shift blocks 36a, 36 on the shift rails 35a, 35d located at both ends in the selecting direction.
Inner wall surface 39a in the select direction of the recesses 39a of 39d and 39d
Plays Cas and Cds in the select direction as shown in FIG. 1 are also formed between s and 39ds, but when the sliding lever 40 is set to the target position, the play Ca
If s and Cds do not become larger than 0, they will not operate smoothly.

Further, a gap Da is provided between the shift blocks 36a and 36b, between the shift blocks 36b and 36c, and between the shift blocks 36c and 36d.
b, Dbc, and Dcd are formed, but when the sliding lever 40 is set to the target position, if the deviation of the engaging portion 40a at the tip of the sliding lever 40 in the select direction is smaller than these gaps Dab, Dbc, and Dcd. The desired shift stage can be achieved by engaging and driving only the desired shift block. However, the shift of the engaging portion 40a in the select direction is caused by the gap Da.
When b, Dbc, or Dcd is exceeded, the engaging portion 40a is engaged so as to straddle two shift blocks in the adjacent shift rails, and therefore the movement in the shift rail shift direction is restricted by the interlock mechanism (not shown). As a result, it becomes impossible to achieve the required shift speed.

The target position of the sliding lever 40 is
The position sensors 50a, 5 are initially set in advance so as to be appropriate for each of the shift blocks 36c to 36d in the select direction and the shift direction based on the actual measurement value obtained by the test.
When the power supply voltage of 0b is changed or the transmission is reassembled, the engaging portion 40a of the sliding lever 40 is in the recessed inner wall surfaces 39af to 39d of the shift blocks 36a to 36d at the initially set target position.
There is a risk of interfering with any of f, 39ar to 39dr, 39as, and 39ds, or engaging the two shift blocks so as to straddle them.

Therefore, the present apparatus has a function of updating the target position of the sliding lever 40 to the center position of each engaging position after the initial setting. That is, the control means 41a in the ECU 41 includes a storage means 41b for storing each target position of the sliding lever 40 as a set position (each neutral position and a target position at each gear position), and each neutral position of the sliding lever 40. And a central position detecting means 41c for detecting a central position at each gear position, and a correction for updating (correcting) each target position stored in the storing means 41b based on each central position detected by the central position detecting means 41c. Command means for outputting a command signal for controlling the means 41d, the drive motor (electric motor) 32a for driving the sliding lever 40 in the select direction and the drive motor (electric motor) 32b for driving the sliding lever 40 in the shift direction according to each target position. 41g is available. These configure the gear shift operation target position setting device for the gear shift operation member (sliding lever 40) according to the present embodiment.

The center position detecting means 41c includes a select center detecting means 41e for detecting a center position in the select direction at each neutral position and each gear position, and a shift direction at each neutral position and each gear position. A shift center detecting means 41f for detecting the center position is provided. The central position detecting means 41c is adapted to detect the central position (the central position in the select direction and the central position in the shift direction) based on the detection command signal.
In 1d, when the central position is detected by the central position detecting means 41c, each target position stored in the storage means 41b is updated (corrected).

In this case, the detection command signal may be manually sent by a mechanic when the power supply voltage of the position sensor changes or when the transmission is reassembled, or, for example, the position sensor. The central position detecting means 41c is automatically operated by providing a function of issuing a detection command signal for the central position from the information indicating that the power supply voltage is reconnected or the information indicating that the transmission system has been reassembled. You may let me.

Here, the central position detecting method by the central position detecting means 41c will be described with reference to FIG. In the central position detecting means 41c, the shift blocks 36a-
Engagement portion 40a in recesses 39a to 39d of each shift block 36a to 36d with 36d in the neutral position.
The sliding lever 40 in which is fitted is driven in the select direction (X direction in FIG. 5) (step S1).
0).

At this time, the voltage applied to the motor 32a is kept low, and the engaging portion 40a of the sliding lever 40 is kept.
However, the recesses 39a to 3 of the shift blocks 36a and 36d, respectively.
The sliding lever 40 is driven until it abuts against the inner walls 39as, 39ds facing the select direction in 9d. As a result, the output values Vas, Vds of the select direction position sensor 50a when the engagement portion 40a of the sliding lever 40 is in contact with the inner walls 39as, 39ds are stored.

As a result, the select direction position sensor 50
When the engaging portion 40a of the sliding lever 40 is driven so that the output value of a becomes the stored values Vas and Vds, the engaging portion 40a is oriented in the select direction in the recesses 39a and 39d of the shift blocks 36a and 36d. Inner wall 39as,
It can be set at the position where it abuts 39ds. If the positions of both ends in the select direction can be grasped in this way, the lengths of the recesses 39a to 39d of the shift blocks 36a to 36d in the select direction are known, so that the shift block 36
The center position of the recesses 39a, 39d of the a, 36d in the select direction can be grasped, and the shift blocks 36b, 36 other than the both ends can be grasped.
Regarding the center positions of the recesses 39b and 39c of c in the selection direction, since the distances between the recesses 39a to 39d have reference values, it is possible to estimate them based on this. of course,
Since the distance between the recesses 39a to 39d is not always the same as the reference value, the center positions of the recesses 39b and 39c in the select direction are further confirmed, which will be described later.

Next, the recesses 39a ...
Based on the central position of 39d in the select direction, the motor 32
a is operated to engage the engaging portion 4 of the sliding lever 40.
0a is set at the center position of the recesses 39a to 39d in the select direction, and then the engaging portion 40a is moved in the shift direction to cause the recesses 39a to 39d when the shift blocks 36a to 36d are in the neutral position. Estimate the shift center position of.

For example, the recess 39 of the shift block 36a
As for a, first, the motor 32a is operated to set the engaging portion 40a of the sliding lever 40 at the center position in the select direction with respect to the recess 39a of the shift block 36a. Here, the motor 32b is operated to move the sliding lever 40 forward (move upward in FIG. 1). At this time, the voltage applied to the motor 32b is kept low, and the engaging portion 40a of the sliding lever 40 is
The sliding lever 40 is pushed until it abuts against the shift direction inner wall 39af in the recess 39a of the shift block 36a.
To drive.

Since the voltage applied to the motor 32b is kept low, the detent mechanism 38 holds the shift block 36a in the shift direction neutral position, while the engaging portion 40a is in the recess 39a of the shift block 36a. It contacts the inner wall front surface 39af facing the shift direction. In this way, the output value Vafn of the shift direction position sensor 50b when the engagement portion 40a of the sliding lever 40 is in contact with the shift direction inner wall front surface 39af is stored.

Similarly, while the voltage applied to the motor 32b is kept low, the motor 32b is operated to move the sliding lever 40 backward, so that the engaging portion 40a of the sliding lever 40 shifts in the recess 39a of the shift block 36a. The sliding lever 40 is driven until it comes into contact with the rear surface 39ar of the directionally oriented inner wall. In this way, the output value Varn of the shift direction position sensor 50b when the engagement portion 40a of the sliding lever 40 is in contact with the shift direction inner wall rear surface 39ar is stored.

As described above, when the shift block 36a is in the shift direction neutral position, the sliding lever 4 is moved.
The engaging portion 40a of 0 is the inner wall front surface and rear surface 39a in the shift direction.
Shift direction position sensor 5 when abutting on f, 39ar
When the output values Vafn and Varn of 0b are grasped, the average value Vaav (= (Vafn + Varn) / 2) of these values is obtained.
Is the shift direction position target value of the sliding lever 40 when the shift block 36a is at the shift direction neutral position.

Similarly, when the shift block 36b is in the shift direction neutral position, the average value of the output values Vbfn and Vbrn of the shift direction position sensor 50b when the shift block 36b contacts the front and rear surfaces 39bf and 39br of the shift direction inner wall is obtained. Value Vbav (= (Vbfn + Vbrn) /
2) is calculated, and the sliding lever 4 when the shift block 36b is at the shift direction neutral position is calculated.
A shift direction position target value of 0 is set.

Similarly, when the shift block 36c is in the shift direction neutral position, the average value of each output value Vcfn, Vcrn of the shift direction position sensor 50b when the shift block 36c is in contact with the front and rear surfaces 39cf, 39cr of the shift direction inner wall. Let Vcav (= (Vcfn + Vcrn) / 2) be the shift direction position target value of the sliding lever 40 when the shift block 36c is in the shift direction neutral position.

Even when the shift block 36d is in the neutral position in the shift direction, the average value Vd of the output values Vdfn, Vdrn of the shift direction position sensor 50b when the shift block 36d is in contact with the front and rear surfaces 39df, 39dr of the shift direction inner wall.
Let av (= (Vdfn + Vdrn) / 2) be the shift direction position target value of the sliding lever 40 when the shift block 36d is at the shift direction neutral position.

Next, each recess 39a grasped as described above.
Based on the center position in the select direction of ~ 39d, the motor 3
2a is operated to set the engaging portion 40a of the sliding lever 40 to the central position in the select direction of the recesses 39a to 39d, and then the motor 32b is activated.
a in the shift direction to move each shift block 36a.
Each recess 39a-3 when ~ 36d is in each shift position
Estimate the central position of 9d. Each shift block 36a-
When moving 36d to each shift position, the voltage applied to the motor 32b is raised to a normal operating level so that the sliding lever 40 can reliably drive each shift block 36a to 36d.

After that, each gear is set to the target gear and
For each target stage, the engaging portion 4 of the sliding lever 40
Detection of the center position (target position) in the select direction and the center position (target position) in the shift direction of 0a is performed in steps S20 to S1.
The process of 00 is repeated until it is determined in step S110 that there is no remaining target gear (the detection of the target position is completed at all gears).

For example, the motor 32b is operated to drive the sliding lever 40, and the shift rail 35a is moved so that the shift block 36a is in the position shown in FIG. 6 (a).
When is moved forward, the shift position is set to R (reverse) (step S20). In this case, the amount of forward movement may be determined according to the distance (known value) between the annular groove 37a for holding the neutral position and the annular groove 37b for holding the R (reverse) position in the detent mechanism 38.

In this way, when the gear is set to R (reverse),
In this state, the motor 32a is operated to move the sliding lever 40 to the left end side and the right end side in the select direction. At this time, the voltage applied to the motor 32a is kept low,
Slide the sliding lever 40 until the engaging portion 40a of the sliding lever 40 comes into contact with the side wall (inner wall in the select direction) 39as in the recess 39a of the shift block 36a and until it comes into contact with the facing surface of the adjacent shift block 36b. Drive in the select direction. Then, the engaging portion 40a of the sliding lever 40 is connected to the shift block 3
The engaging portion 4 of the sliding lever 40 when the side wall 39as of 6a or the facing surface of the shift block 36a is abutted.
The position of 0a (left end position, right end position) is measured by the select direction position sensor 50a (steps S30 and S4).
0). As a result, as shown in FIG. 6A, it is possible to detect the clearance C _Rs between the engagement portion 40 a and the side wall 39 as at the start of the main learning and the distance D _R2 between the facing surfaces of the shift block 36 b. , Here, as an intermediate position (target position) in the select direction of the engaging portion 40a of the sliding lever 40, an intermediate position in the select direction (position where C _Rs = D _R2 )
Is calculated by simply averaging the measurement values of the select direction position sensor 50a according to the left end position and the right end position (step S
50).

Further, in the state where the gear stage is set to R (reverse),
How to select the engaging part 40a of the sliding lever 40
The center position calculated in step S50 (the target position)
(Step S60), the motor 32b is activated.
And move the sliding lever 40 in the shift direction.
Let Also at this time, the voltage applied to the motor 32b is kept low.
The engaging portion 40a of the sliding lever 40 is
Of the inner wall of the lock block 36a in the recess 39a in the shift direction
And slides until it abuts the rear surfaces 39af, 39ar.
The swing lever 40 is driven. And sliding
The engaging portion 40a of the lever 40 is connected to the shift block 36a.
Abutting on the front and rear surfaces 39af, 39ar
Of the engaging portion 40a of the sliding lever 40 when
Position (movable end position on the insertion side, movable end position on the removal side)
It is measured by the directional position sensor 50b (step S7).
0,80). As a result, as shown in FIG.
Gap between the inner wall front surface 39af at the engaging portion 40a at the start of learning
Interval C_RfAnd the gap C between the inner wall rear surface 39ar_RrCan detect
The sliding lever 40 is engaged here.
As the center position (target position) in the shift direction of the portion 40a,
Intermediate position in the shift direction (C _Rf= C_RrPosition)
Side movable end position, shift direction position according to the removal side movable end position
The values measured by the position sensor 50b are simply averaged to calculate (step
S90).

After that, the gear is disengaged to the neutral position (step S100). Similarly, the gear position is set to 1 (1st gear), 2 (2nd gear), 3 (3rd gear) (see FIG. 6B), and 4 (4th gear) ( 6 (c)), in the state of 5 (5th speed) and the state of 6 (6th speed), the clearances C _1f , C _1r , C _2f , and C _2f in the shift direction, respectively.
C _2r , C _3f , C _3r , C _4f , C _4r , C _5f , C _5r , C _6f and select direction distances C _1S , D ₁₃ , D _2R , D ₂₄ , D ₃₁ ,
By detecting the _{D 35, D 42, D 46} , D 53, D 56, D 64, C 6S, central position (shift direction center position and the select direction center position of the engaging portion 40a of the sliding lever 40 in each gear ) Can be detected respectively.

Incidentally, C _1f and C _1r are the clearances in the shift direction between the inner wall front surface 39af and the inner wall rear surface 39ar when the gear is in the first speed, and C _2f and C _2r are the gears in the second speed. The inner wall front face 39bf and the inner wall rear face 39br in the shift direction, C _3f and C _3r are the gaps in the shift direction between the inner wall front face 39bf and the inner wall rear face 39br when the gear is in the third speed,
C _4f and C _4r are the inner wall front surface 39 in the state where the gear is set to the fourth speed.
cf, a clearance in the shift direction between the inner wall rear surface 39cr, C _5f ,
C _5r is the inner wall front surface 39cf in the state where the gear position is set to the 5th speed,
Indicating the shift direction of the gap between the inner wall rear 39cr, C _6f, C _6r inner wall front 39df in a state in which the 6-speed shift stage, the shift direction of the gap between the inner wall rear 39Dr, respectively.

C_1SIs the side wall 3 in the state where the gear stage is set to the 1st speed.
Gap in the select direction with 9as, D ₁₃Shifts to 1st gear
In the select direction with the shift block 36b
Distance, D_2RIs the shift block when the gear is in the 2nd speed.
The distance in the select direction from the black 36a, D_{twenty four}Is the second speed
Direction with shift block 36c
Distance, D₃₁Is the shift block with the gear set to the 3rd speed.
Distance from the rack 36a in the select direction, D₃₅Shifts to 3
How to select with the shift block 36c at high speed
The distance of D₄₂Is the shift gear when the gear is set to the 4th speed.
Select distance from lock 36b, D₄₆Is the gear
Select with shift block 36d in 4th speed
Direction distance, D₅₃Shifts with the gear set to the 5th speed
Distance in the select direction from the block 36b, D₅₆Is the gear
Selection with shift block 36d in 5th gear
Distance in D direction, D₆₄Is a shift with 6th gear
Distance in the select direction from the toe block 36c, C_6SIs gear shifting
Select direction with the side wall 39ds in the state where the gear is set to the 6th speed
, The gaps of are shown respectively.

When the detection of the central position at all the shift speeds is completed, the process proceeds to step S120, and the target position is updated. That is, each target position stored in the storage unit 41b is corrected by the correction unit 41d to the center position detection unit 4
Update (correction) to each central position detected in 1c.

Since one embodiment of the present invention is configured as described above, when the power supply voltage of the position sensor changes, when the transmission is reassembled, or when the sliding lever 40, the detent mechanism, or the like is used. Even if the operating element is worn, it is possible to detect the neutral position and the central position (optimal position) of the sliding lever 40 at each gear and update this as the target position.
The movement control of the sliding lever 40 can be accurately and appropriately performed, and the mechanical automatic transmission can be appropriately controlled.

In particular, when the power supply voltage of the position sensors 50a and 50b changes or when the transmission is reassembled, the target voltage value and the output voltage value of the position sensor are different when the shift blocks are at various shift positions. However, since this apparatus detects the center position (optimal position) of the sliding lever 40 at each shift position (each gear position) and uses it for control, such a deviation is also eliminated. be able to. Of course, it can also cope with deterioration over time.

The center position (optimum position) of the sliding lever 40 is detected by the position sensors 50a and 5a.
When the power supply voltage of 0b is changed or the transmission is reassembled, the maintenance person may give an instruction to carry out the operation, or the position sensor 50
It may be automatically performed by detecting a change in the power supply voltage of a or 50b or a case where the transmission is reassembled, or automatically when the traveling distance of the vehicle reaches a predetermined distance.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments and various modifications can be made without departing from the spirit of the present invention. For example, although the embodiment has been described as an example in which the present invention is applied to a mechanical automatic transmission, the present invention can also be applied to a mechanical manual transmission that is electrically operated by remote control.

[0067]

As described above, according to the shift control device for a transmission of the present invention, the set position of the shift operating member corresponding to each shift stage is updated to an appropriate one, and the electric drive means is used. The shift operation member can be appropriately driven. The shift operation member is configured to engage with the shift rail side engaging portion with a required play in the shift direction and / or the select direction, and the center position is set so that the amount of the play is If the positions are equal in the front-rear direction or the left-right direction, the set position of the speed change operation member can be easily and surely updated to an appropriate position.

In the central position detecting means, the position information of the shift operating member when the shift operating member is located at both ends in the front-rear direction or the left-right direction with respect to the engaging portion on the shift rail side is used as the operating member position If it is configured such that the midpoint position of the both ends is the central position, obtained from the detection means, the set position of the gear shift operation member can be accurately updated to an appropriate position.

Further, according to the gear shift operation target position setting device of the gear shift operation member of the present invention, the central position in the select direction and the center position in the shift direction of the gear shift operation member are updated to appropriate ones and the electric drive means is used. The shift operation member can be appropriately driven.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of a shift control device for a transmission according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a drive system of an automobile equipped with a mechanical automatic transmission according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a gear shift unit according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating a clutch control unit according to an embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a main part of a gear shift unit according to an embodiment of the present invention.

FIG. 6 is a schematic diagram illustrating central position detection of a main part (sliding lever as a gear shift operation member) of the gear shift unit according to the embodiment of the present invention, FIG.
(C) is a diagram for explaining the central position detection at each shift speed.

FIG. 7 is a flowchart illustrating a center position updating logic according to an exemplary embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating a conventional technique according to the present invention.

[Explanation of symbols]

1 Engine 2 Clutch Mechanism (Clutch) 3 Mechanical Automatic Transmission Main Body 31 Gear Shift Units 32, 32a, 32b Electric Actuator (Electric Drive Means) 33 Gear Shift Driver Circuit 40 Sliding Lever (Shift Operation Member) 41 Transmission ECU (Control Unit) ) 41a gear shift control function (control means) 41b storage means 41c central position detection means 41d correction means 41e select central detection means 41f shift central detection means 50a, 50b position sensor (shift operation member position detection means)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Atsushi Kumazawa             Mitsubishi Motors, 5-3-8 Shiba, Minato-ku, Tokyo             Industry Co., Ltd. (72) Inventor Toshikuni Shirasawa             Mitsubishi Motors, 5-3-8 Shiba, Minato-ku, Tokyo             Industry Co., Ltd. (72) Inventor Yukihiko Shiono             Mitsubishi Motors, 5-3-8 Shiba, Minato-ku, Tokyo             Industry Co., Ltd. F term (reference) 3J067 AA01 AB23 AC01 BA58 DB32                       FB45 GA01

Claims (4)

[Claims] 1. A plurality of shift rails for operating a gear shift mechanism of a transmission, a shift direction that is an axial direction of the shift rails, and a select direction that is orthogonal to the shift direction. A shift operation member that engages with any one of the shift rails to move the one shift rail in the shift direction when moving in the shift direction; Shift control of a transmission including electric drive means that is movable in the shift direction and the select direction, and control means that controls the operation of the electric drive means to move the shift operation member in response to a shift command. In the device, the control means controls the operating member position detecting means for detecting the position of the shift operating member and the set position of the shift operating member corresponding to each gear. Storage means for storing, movement command means for instructing the shift operation member to move to the set value of the shift speed corresponding to the shift command in response to the shift command, and the shift operation corresponding to the shift speed. Central position detecting means for detecting the central position of the member, and correction means for updating the set position stored in the storage means to the central position detected by the central position detecting means. A shift control device for a transmission. 2. The shift operation member is configured to engage with an engaging portion on the shift rail side with a required play in the shift direction and / or the select direction, and the central position is The shift control device for a transmission according to claim 1, wherein the amount of play is equal in the front-rear direction or the left-right direction. 3. The center position detecting means operates the position information of the shift operating member when the shift operating member is at both ends in the front-rear direction or the left-right direction with respect to the engaging portion on the shift rail side. Obtained from a member position detecting means, characterized in that the middle point position of the both ends is the central position,
A shift control device for a transmission according to claim 1. 4. A plurality of shift rails for operating a gear shift mechanism of a transmission, and a shift direction which is an axial direction of the shift rails according to an electric driving force from an electric drive means and the shift direction. A shift operation member that is movably arranged in the select direction orthogonal to each other, and engages with any one of the shift rails to move the one shift rail in the shift direction when moving in the shift direction. Select center detecting means for detecting the center position of the shift operating member in the select direction when the predetermined shift speed is achieved, and shift center detection for detecting the center position of the shift operating member in the shift direction when the shift speed is achieved. Means, and a shift center detected by the shift center detecting means and a shift center detected by the shift center detecting means. And sets the shift operation when the target position of the shift operating member in the shift stage based on the central position, the shift operation at the target position setting device of the shift operating member.