JP2003065436A - Method for controlling transmission speed change control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a vehicle to run for the time being even when a position sensor 34 for select or a position sensor 44 for shift goes out of order. SOLUTION: When the position sensor 34 for select goes out of order, after a stop of a vehicle and disengagement of a clutch are confirmed, by driving a motor 36 for shift, a striker is moved to a position on a select line and thereafter, by driving a motor 28 for select for a given time or more, dashing against a shift line of a first speed or an R-th-speed at the endmost of the select line is effected. Thereafter, select operation is prohibited and shift operation is effected only on the shift line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission shift control system using a motor-driven transmission operating device, and more particularly to a shift control system capable of coping with a failure of a shift position sensor or a select position sensor. The present invention relates to a control method of a machine speed change control system.

[0002]

2. Description of the Related Art Pneumatic drive type transmission operating devices that have been generally used in the past include a shift air cylinder and a select air cylinder. By combining air supply to these air cylinders, the air cylinder is selected. The position of the piston is uniquely determined as each shift position, and the shift position control is performed by detecting the piston position by the shift position sensor and the select position sensor.

The conventional pneumatically driven transmission operating device also includes a shift position sensor and a select position sensor, and shift control is performed by signals from these position sensors. However, since the position of the piston of the air cylinder is determined by the combination of the air supply to the air cylinder as described above, even if the shift position sensor or the select position sensor fails, the air supply to the air cylinder is stopped. Since the position of the piston can be estimated by controlling, the shift control of the transmission can be performed by the estimation control.

On the other hand, in the motor-driven transmission operating device,
The shift position sensor detects the position in the shift direction to control the shift motor so that the striker becomes the shift position, and the select motor similarly detects the striker's position in the select direction. By doing so, the select position is controlled.

[0005]

Therefore, if the shift position sensor or the select position sensor fails, the shift position control or the select position control cannot be performed.
The shift control of the transmission cannot be performed.

The present invention has been made in order to solve the above-mentioned problems. Even if the shift position sensor or the select position sensor of the motor drive type transmission operating device fails, the shift position control or the select position control is performed. It is an object of the present invention to provide a control method of a transmission gear shift control system that enables the vehicle to perform at least tentative travel, for example, allows travel only to a nearby maintenance shop. Is.

[0007]

According to a first aspect of the present invention, there is provided a control method for a transmission shift control system, comprising: a shift motor for performing a shift operation of a transmission; a select motor for performing a select operation; and a striker. Of a shift position sensor for detecting the position of the shift direction in the shift direction, and a position sensor for selection for detecting the position of the striker in the select direction, the shift motor and the selection motor A method for controlling a transmission shift control system including an electric control device for controlling an operation to control a shift of the transmission, wherein the vehicle is stopped and the clutch is disengaged when the select position sensor fails. At this time, the shift motor is driven to move the striker to the neutral position, and then the select motor is driven. The striker is brought into contact with the stopper at the extreme end of the select line to secure the shift line at that position, and thereafter, the select operation is prohibited, and the shift control is performed only for the shift operation. It is a thing.

In the control method of the transmission shift control system according to the present invention, when the select position sensor fails, it is moved to the shift line at one end on the select line by driving the select motor, and thereafter, Prohibit the select operation, drive the shift motor with the normal shift position sensor, and perform the shift control only for the shift operation on the most end shift line (normally the reverse speed and the first speed shift line). To do.

According to a second aspect of the present invention, in the first aspect of the invention, the select motor is driven for a predetermined time and then stopped, and the striker is brought into contact with the stopper at the end of the select line. It is characterized by that.

According to a third aspect of the present invention, in the first aspect of the invention, the select motor is driven, and when the drive current exceeds a predetermined value, the select motor is stopped and the striker is turned on. It is characterized in that it comes into contact with the stopper at the extreme end of the select line.

According to a fourth aspect of the present invention, there is provided a shift motor for performing a shift operation of a transmission, a select motor for performing a select operation, a shift position sensor for detecting a position of a striker in a shift direction, and the striker. Motor-driven transmission operating device having a selection position sensor for detecting the position in the selection direction, and an electric control device for controlling the operation of the shift motor and the selection motor to perform shift control of the transmission. A method of controlling a transmission shift control system comprising: a shift position sensor, a shift operation from a neutral position to a shift position determines a driving direction of the shift motor, and The striker motor is driven in that direction to bring the striker into contact with the stopper at the shift position, and The shift operation from the shift position to the neutral position determines the drive direction of the shift motor, and the drive force of the shift motor is smaller than the force with which the striker exits the detent mechanism of the transmission. The striker is engaged with the detent mechanism by driving the striker to operate the striker to the neutral position.

In the control method of the transmission shift control system according to the fourth aspect, when the shift position sensor fails, the operation from the neutral position to the shift position shifts the striker by driving the shift motor. The detent mechanism of the transmission is used to engage the detent mechanism when the shift position is brought into contact with the position stopper and the shift position is actuated by the shift position sensor. It is possible to secure the shift position of the transmission without it.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the shift position of the transmission after the shift operation is stored in a memory, and the memory stores the shift position in the next operation. , Determining whether the transmission is in a neutral position or a shift position and determining a driving direction of the shift motor.

According to a sixth aspect of the present invention, in the invention according to the fourth or fifth aspect, the shift operation from the neutral position to the shift position is stopped after driving the shift motor for a predetermined time. The striker is brought into contact with the stopper at the shift position.

According to a seventh aspect of the invention, in the invention according to the fourth or fifth aspect, the shift operation from the neutral position to the shift position is performed when the drive current of the shift motor exceeds a predetermined value. It is characterized by stopping and bringing the striker into contact with the stopper at the shift position.

According to an eighth aspect of the present invention, in the invention according to the fourth to seventh aspects, the shift operation from the shift position to the neutral position is performed by driving the shift motor for a predetermined time or more. The feature is that it is determined that the neutral position is reached.

According to a ninth aspect of the present invention, in the shift operation from the shift position to the neutral position according to the fourth to seventh aspects, the drive current of the shift motor becomes a predetermined value or more. This is characterized in that it is determined that the neutral position has been reached.

According to a tenth aspect of the invention, in the invention of the fourth to ninth aspects, the operation from the shift position to the neutral position causes the shift motor to come out of the gear of the transmission. The detent mechanism is driven with a necessary drive current for a time necessary for exiting, and then is driven with a drive force smaller than the force for exiting the detent mechanism.

According to an eleventh aspect of the present invention, in the invention according to the first to tenth aspects, when the select position sensor or the shift position sensor fails, an alarm is issued to notify the driver. It is characterized by.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to embodiments shown in the drawings. The transmission shift control system according to the present invention uses a motor-driven transmission operating device. First, an example of the motor-driven transmission operating device will be briefly described with reference to FIGS. 1 and 2. In this motor-driven transmission operating device (generally indicated by reference numeral 20), a shift shaft 24 is rotatably supported in a housing 22, and an axially movable striker 26 is provided on the outer periphery of the shift shaft 24. It is arranged. Splines are formed on the outer peripheral surface of the shift shaft 24 and the inner peripheral surface of the striker 26.
4 is movable in the axial direction and rotates integrally with the shift shaft 24.

The housing 22 includes a selection motor 2
8 is mounted, and its motor shaft 30 is arranged parallel to the shift shaft 24. A screw is formed on the motor shaft 30, and a connecting member 32 is screwed into the motor shaft 30, and the connecting member 32 is engaged with the engagement protrusion 26 a of the striker 26. Therefore, the selection motor 28
When the motor is driven, the motor shaft 30 rotates, the connecting member 32 moves on the motor shaft 30 in the axial direction, and the striker 26 moves on the shift shaft 24 in the axial direction in response to the rotation of the transmission member. Select operation is performed. A select position sensor 34 is arranged on the side of the motor shaft 30 of the housing 22 so that the position of the striker 32 can be detected. The position sensor 34 may be used to detect the position of the connecting member 32.

A shift motor 36 is attached to the housing 22 in a direction orthogonal to the shift shaft 24 so as to have a height different from that of the shift shaft 24 (see FIG. 2). A screw is formed on the motor shaft 38 of the shift motor 36, and the connecting member 40 is screwed into the screw. The lever 4 is attached to the tip of the shift shaft 24.
2 (see FIG. 2) is fixed, and a notch 42a formed on the tip side of the lever 42 is engaged with a pin 40a provided on the connecting member 40. Therefore, when the shift motor 36 is driven, the motor shaft 38 rotates, the connecting member 40 moves on the motor shaft 38 in the axial direction, and the lever 42 rotates accordingly. When the lever 42 rotates, the shift shaft 24 and the striker 26 splined on the shift shaft 24 integrally rotate. As a result, the shift operation of the transmission is performed. A shift position sensor 44 is provided on the side of the housing 42 on the side of the lever 42 so that the rotational position (shift position) of the lever 42 can be detected. The shift position sensor 44 may detect the rotational position of the shift shaft 24 or the striker 26.

The motor-driven transmission operating device 2 having the above-mentioned structure
A transmission shift control system using 0 is a manual electric shift control system in which a shift operation is performed by a driver's shift lever operation, and a vehicle speed increase / decrease control by a driver's accelerator and brake operation. 2. Description of the Related Art A fully automatic gear shift control system that automatically controls gear shift of a transmission is known.

First, an example of the configuration of the manual electric shift control system will be briefly described with reference to the block diagram shown in FIG. It should be noted that this block diagram shows connections and arrangements for explaining control when the select position sensor 34 fails. The manual electric shift control system includes a shift lever 50 that outputs a shift electric command signal according to a driver's operation, and the motor-driven transmission operating device 2 that is attached to a mechanical transmission to shift the transmission.
0 (see FIGS. 1 and 2), a shift electric command signal from the shift lever 50, a connection / disconnection signal of the clutch 52 which is connected / disconnected controlled by operating a clutch pedal, and a shift of the motor drive type transmission operating device 20. Outputs of the position sensor 44 for selection and the position sensor 34 for selection are input, and the drive of the shift motor 36 and the selection motor 28 of the motor-driven transmission operating device 20 is controlled according to these signals to control the transmission. It is composed of an electric control device 54 and the like for performing shift control.

In the manual electric shift control system shown in FIG. 3, in the normal control when the select position sensor 34 and the shift position sensor 44 are in a normal state, the shift command signal from the shift lever 50 is transmitted to the electric control unit 54. When input to the motor control unit 56, the motor control unit 56
Is a position sensor 34 for selection, a position sensor 4 for shift
4, clutch 52 and vehicle speed (engine speed) 5
Based on each input signal of No. 8, the drive of the select motor 28 and the shift motor 36 is controlled to perform the shift control of the transmission.

In the manual electric shift control system, when the select position sensor 34 fails, the position in the select direction cannot be detected as described above.
Normal shift control cannot be performed. Therefore, in the present invention,
When the select position sensor 34 fails, after confirming the stop of the vehicle and the disengagement of the clutch, the striker of the transmission is moved to the N1 position at the end of the select line (refer to the operation pattern of the transmission shown in FIG. 4), that is, 1 The select operation is performed on the shift lines of the high speed and the reverse speed (R speed), and then the select operation is prohibited, and the shift control is performed only on the shift line at the N1 position.

The block diagram (FIG. 3) of the control procedure when the select position sensor 34 has a failure as described above,
The operation pattern of the transmission (FIG. 4) and the control flowchart shown in FIG. 5 will be described. The sensor failure detection unit 58 of the electric control device 54 monitors the failure of the select position sensor 34, and when the failure of the select position sensor 34 is detected (step 1), it is output to the sensor failure time control unit 60, and this The sensor failure control unit 60 performs the following control.

The sensor failure control unit 60 first outputs to the alarm lamp control unit 62 to turn on the alarm lamp 64 to notify the driver of the abnormality (step 2). continue,
The vehicle stop detection unit 66 to which the vehicle speed 58 is input is
It is detected whether or not the vehicle is stopped (step 3), and if the vehicle is not stopped, that is, if the vehicle is traveling, a command signal is issued to the motor control unit 56 so as to maintain the current gear. Is issued to prohibit the shift operation (step 4).

When the vehicle stop detector 66 confirms that the vehicle is stopped in step 3, the clutch operation detector 6
Based on the clutch operation status signal from 8, it is confirmed whether or not the clutch 52 is disengaged (step 5). In order to disengage the clutch 52, the driver must depress the clutch pedal in the case of the manual type, but since the alarm lamp 64 is turned on in step 2, the driver recognizes the abnormality. , Depress the clutch pedal to disengage the clutch 52.

When the clutch pedal is depressed, the clutch 5
When 2 is disconnected and the vehicle stop is confirmed by the signal from the vehicle stop detection unit 66, the motor control unit 56 outputs an operation signal to the shift motor 36. The shift motor 36 operates to shift to the neutral position (NE position) by the signal from the shift position sensor 44 (step 6).

Next, an operation signal is output to the selection motor 34, and the selection motor 34 is driven to move toward the extreme end position (N1 position) including the reverse speed (R speed) of the select line. (Step 7). The drive time of the select motor 28 is measured by the motor drive time measuring unit 70, and when a predetermined time has elapsed (step 8), the select motor 28 is stopped (step 9). The predetermined time in step 8 is set to a time longer than the time required to perform the select operation from the extreme end position (N3 position) on the opposite side of the select line to the N1 position, and the drive of the select motor 28 is started. If that predetermined time has passed from
It can be presumed that the N1 position is surely selected. The position of the end of the select line (N1 position and N
Since the third position) has a mechanical stopper, the select position can be mechanically secured by hitting the stopper. Further, in this embodiment, the select motor 28 is driven for a predetermined time in order to move the striker to the position at the extreme end of the select line. However, when the striker position is estimated by the drive time, It is not limited. For example, the drive current of the select motor 28 is measured, and the current rises when the striker hits the stopper at the end of the select line. Therefore, when the drive current exceeds a predetermined value, the N1 position is reached. The selection motor 28 may be stopped when it is determined that the motor has moved.

After selecting operation to the N1 position,
The selection motor 28 is stopped, and in step 10, the motor control unit 56 is instructed to perform select operation prohibition control. In this select operation prohibition control, even if the driver operates the shift lever 50 to a position other than the shift line at the extreme end of the select line (N1 position), the select operation is not performed except for the shift line at the N1 position.
This shift line is maintained, and the driver can perform only the first speed and the R speed. If the control according to the present embodiment is performed in this way, even if the select position sensor 34 fails, it is possible to run for a time without being completely disabled.
You can drive to a nearby maintenance shop.

In the shift control, when the select position sensor 34 is out of order, it is necessary to move the shift line to the extreme shift line (N1 position) of the select line. However, if it is operated while the vehicle is running, sudden deceleration may occur. In addition, since the vehicle may jump out when the clutch is engaged, the operation needs to be performed when the vehicle is stopped and the clutch is disengaged. Therefore, in steps 3 and 4, it is confirmed that the vehicle is stopped and the clutch is disengaged.

Next, the structure of the fully automatic shift control system will be briefly described. Since the configuration of this fully automatic shift control system has many parts in common with the configuration of the manual shift control system shown in FIG. 3, illustration thereof is omitted, and a description will be given with reference to FIG. In addition, in the fully automatic shift control system, as shown in FIG.
The clutch operation detection unit 68 of the clutch control unit (reference numeral 68)
(A will be added and explained). Further, a signal from the accelerator is input to the motor control unit 56.

The fully automatic shift control system includes a shift lever 50 which outputs a shift electric command signal by a driver's operation.
A motor-driven transmission operating device 20 that is attached to a mechanical transmission to perform a gear shifting operation of the transmission, a clutch operating device that is electrically controlled to perform engagement / disengagement control of the clutch 52, an engine speed, Based on the vehicle speed, for example, it is composed of an electric control device 54 and the like that performs shift control of the transmission with a shift map or the like. It should be noted that the shift lever 50 basically issues a command for traveling, reversing, parking, and other instructions such as upshift and downshift.

In this fully automatic shift control system, the motor control unit 56 and the clutch control unit 68A cause the shift lever 50, the clutch control unit 68A and the shift lever 50 to operate normally when the select position sensor 34 and the shift position sensor 44 operate normally. The clutch operating device, the shift motor 36, and the select motor 28 are controlled based on signals from the accelerator (not shown), vehicle speed (engine speed) 58, select position sensor 34, and shift position sensor 44. To engage and disengage the clutch and control the transmission gear shift.

In the fully automatic shift control system, the control procedure when the select position sensor 34 fails will be described with reference to the flowcharts shown in FIGS. 3 and 6. The sensor failure detection unit 58 is the position sensor 34 for selection.
Is being monitored, and when a failure of the select position sensor 34 is detected (step 1), the sensor failure control unit 6
Output to 0. The sensor failure control unit 60 outputs the warning lamp control unit 62 to turn on the warning lamp 64 to inform the driver of the abnormality (step 2).

The vehicle stop detection unit 66 detects whether or not the vehicle is stopped (step 3). If the vehicle is not stopped, the motor control unit 56 is made to maintain the current gear position. The command signal is issued to (step 4).

When the vehicle stop detector 66 confirms that the vehicle is stopped in step 3, the clutch controller 68A
The clutch 52 is disengaged (step 5A), and an operation signal is output to the shift motor 36. The shift motor 36 shifts to a neutral position (NE position in FIG. 4) by a signal from the shift position sensor 44 (step 6). In the manual shift control system of the first embodiment, the clutch operation is performed by the driver, and therefore, the operation is waited for before proceeding to the next step (step 6). Since this is a fully automatic shift control system, the clutch operating device is operated in step 5A to automatically disengage the clutch 52, and the process proceeds to the next step (step 6).

Next, an operation signal is output to the select motor 28 to move it to the extreme end position (N1 position) of the select line (step 7). The motor drive time is measured by the motor drive time measuring unit 70, and when the predetermined time has elapsed (step 8), the selection motor 28 is stopped (step 9). As in the case of the first embodiment, the drive current of the select motor 28 may be measured and stopped when the current value exceeds a predetermined value. The selection motor 28 is stopped, and in step 10, the motor control unit 56 is instructed to perform select operation prohibition control. In this embodiment,
When it is confirmed that the vehicle has stopped, in step 5A, the clutch operating device is actuated to disconnect the clutch 52, which is the only difference from the first embodiment, and the other parts are the same. Therefore, even with this fully automatic shift control system, even if the select position sensor 34 fails, the vehicle is not completely incapable of traveling, and it is possible to travel tentatively and to travel to a nearby maintenance shop.

Next, a third embodiment will be described with reference to the block diagram shown in FIG. 7 and the control flowchart shown in FIG. This embodiment relates to control in the case where the shift position sensor 44 fails in the fully automatic shift control system. The same or corresponding parts as those in the first embodiment (see FIG. 3) will be designated by the same reference numerals and described.

In the configuration according to this block diagram, the configuration shown in FIG.
In addition to the configuration of the manual electric shift control system, the clutch operation detection unit 68 is changed to a clutch control unit 68A and an accelerator 72 is added. Further, the present invention relates to control when the shift position sensor 44 is out of order, and reverses the positions of the shift position sensor 44 and the select position sensor 34 and the positions of the shift motor 36 and the select motor 28, and drives the motor. A current measuring unit 74 is added.

The sensor failure detection unit 58 monitors the failure of the shift position sensor 44, and the shift position sensor 44 is detected.
When the failure is detected (step 101), it is output to the sensor failure control section 60, and the sensor failure control section 60 performs the following control.

The sensor failure control unit 60 first outputs to the alarm lamp control unit 62 to turn on the alarm lamp 64 to notify the driver of the abnormality (step 102). Next, the vehicle stop detection unit 6 detects whether or not the vehicle is stopped (step 103), and if the vehicle is not stopped, the motor control unit 56 is caused to hold the current shift speed. A command signal is issued to prohibit the shift operation (step 104).

When the vehicle stop detector 66 confirms that the vehicle is stopped in step 3, the clutch controller 68A
To disconnect the clutch 52 (step 105),
An operation signal is output to the shift motor 36. This signal drives the shift motor 36 to shift in a predetermined direction (step 106). Motor drive time measurement unit 7
The shift motor 36 is driven for a predetermined time (first predetermined time) according to the measured time from 0 (step 107). This first predetermined time is set longer than the time required to perform the shift operation from one shift position to the shift position on the opposite side, that is, between the SH1 position and the SH2 position in FIG. Even if it is not known, the shift position is surely moved to one shift position (SH1 position or SH2 position).

After the lapse of the first predetermined time, the shift motor 36 is then driven in the reverse direction. At this time, the motor drive current measuring unit 74 measures the motor drive current and sets the drive current to the first predetermined value for driving (step 10).
8). The first predetermined value of the drive current is greater than the operating force required to get out of the detent mechanism when the striker engages with the detent mechanism that the transmission has at the neutral position (NE position) in the shift line. The operating force of is set to be small.

When the drive current of the motor becomes equal to or larger than the second predetermined value which is larger than the first predetermined value (step 109), the shift motor 36 is stopped (step 110). Here, when the striker engages the detent mechanism at the neutral position (NE position) and does not move anymore, and the drive current increases accordingly, it is determined that the striker has reached the neutral position (NE position), and the shift motor 36 is stopped. .

Next, in step 111, the select motor 28 is driven to select the position sensor 34 to the N1 position at the end of the select line, and then the motor controller 56 is operated to select. The prohibition control is instructed (step 112), and the shift special control is instructed (step 113). The select prohibition control is to fix the select position to the shift line at the N1 position so that even if the shift lever tries to select another line, it cannot be performed. The special shift control is to perform the shift operation on the shift line at the N1 position at the end of the select line without using the shift sensor 44, and is performed according to the flowchart shown in FIG.

In this special shift control, from the neutral position (NE position) of the N1 line to the shift position (1
(Speed or R speed) is performed by driving the shift motor 36 until the striker contacts the stopper on the transmission side, and the operation from the shift position to the neutral position (NE position) is performed at the neutral position of the transmission. The detent mechanism is used to drive the shift motor 36 with a driving force that is small enough not to slip out of the detent mechanism and engage the detent mechanism to stop it in the neutral position.

At step 114, the neutral position (N
From the NE position of one line) to the shift position (1st speed or R
It is determined whether the control is for speed control or for control from the shift position to the neutral position. In the case of control from the neutral position to the shift position, first, the shift lever 5
From the target shift position by operating 0, shift motor 3
The drive direction of No. 6 is determined (step 115), an operation signal is output to the shift motor 36, and the shift motor 36 is driven to shift in a predetermined direction (step 116).
The shift motor 36 is driven for a predetermined time (second predetermined time) based on the measurement time from the motor drive time measurement unit 70 (step 117). The second predetermined time is set longer than the time required to shift from the neutral position to one of the shift positions, and the second predetermined time is ensured to move to the predetermined shift position. The movement to the shift position may be determined not by the drive time of the shift motor 36 but by the striker hitting the stopper to increase the drive current.

When the second predetermined time has elapsed, it is estimated that the shift position has been reached, the shift motor 36 is stopped (step 118), the shift position is stored in the memory (step 119), and the shift operation is completed. (Step 12
0).

In the case of control from the shift position (1st speed or R speed) to the neutral position (NE position of the N1 line) (step 121), the shift motor 36 is moved from the shift position stored in the memory. Drive direction is determined (step 122), and the shift motor 36 is driven.
At this time, the motor drive current measuring unit 74 measures the motor drive current and drives the motor drive current at the first predetermined value (step 123). As described above, the first predetermined value of the drive current is obtained when the striker engages with the detent mechanism that the transmission has at the neutral position in the shift line.
The operating force of the motor is set to be smaller than the operating force required to get out of the detent mechanism.

When the drive current of the motor becomes equal to or larger than the second predetermined value which is larger than the first predetermined value (step 124), the shift motor 36 is stopped (step 125) and its position is stored in the memory (step 126). ). This third
In the fully automatic transmission control system according to the embodiment of the present invention as well, even if the shift position sensor 44 fails, the vehicle is not completely incapable of traveling, and it is possible to travel for a time and can travel to a nearby maintenance shop. . In this embodiment, since the shift position sensor 44 is out of order and a signal regarding the position of the striker in the shift direction cannot be obtained, the shift position stored in the memory is the shift position of the transmission (in this case, Needless to say, the first speed, the R speed, or the neutral position).

FIG. 10 is a control flow chart of the manual electric transmission control system according to the fourth embodiment. Although the basic procedure is the same as that of the third embodiment (see FIG. 8), Since it is a mold, only step 105A is different from step 105 of the above-described embodiment of the fully automatic type. Further, since the control block diagram has many parts in common with the configuration of the fully automatic shift control system of FIG. 7, the illustration is omitted, and the description will be made with reference to FIG. It should be noted that the clutch control unit 68A of FIG. 7 is changed to a clutch operation detection unit (described with reference numeral 68), and a signal from the accelerator 72 is not input.

In the manual electric shift control system, the clutch operation is performed by the driver. Therefore, when the vehicle stop detecting section 66 confirms that the vehicle is stopped in step 103, the clutch operation state from the clutch operation detecting section 68 is detected. It is confirmed from the signal whether the clutch 52 is disengaged (step 105A). When the clutch 52 is not disengaged, the driver depresses the clutch pedal to disengage the clutch. After that, the shift motor 36 is driven to perform the same control as in the third embodiment (step 10).
6 to step 112). After performing the select operation inhibition control, the same special shift control is performed (step 114 to step 126).

11 and 12 are control flowcharts when the shift position sensor 44 malfunctions in the transmission shift control system according to the fifth embodiment. In this embodiment, common control is performed by the manual electric shift control system and the fully automatic shift control system. In the third and fourth embodiments, when the shift position sensor 44 fails, the select line is fixed to the N1 position to perform shift control, but the select position sensor 34 operates normally. Therefore, since it is not necessary to limit the select operation, the special shift control including the select operation is performed. Also in this embodiment, description will be made with reference to the block diagram of FIG. 7.

The sensor failure detection unit 58 monitors the failure of the shift position sensor 44, and the shift position sensor 44 is monitored.
When the failure is detected (step 201), it is output to the sensor failure control unit 60, and the sensor failure control unit 60 outputs it to the alarm lamp control unit 62 to turn on the alarm lamp 64 to notify the driver of the abnormality. Notify (step 202). After that, the special shift control shown in FIG. 12 is performed (step 20).
3).

This special shift control is the same as the special shift control shown in FIG. 9 and is additionally provided with a select operation. The shift operation is the same as the shift special control of the third embodiment, and the same reference numerals as those in FIG. 9 are attached to each step and the description thereof is omitted.
After the shift operation is completed (step 120), when the select operation is performed (step 204), the neutral position (NE position) of the shift line cannot be detected because the shift position sensor 44 has a malfunction. After determining that the vehicle is in the neutral position (NE position) from the positions (S119, S126) stored in (step 205), the select operation is performed (step 20).
6).

FIG. 13 is a control flow chart when the shift position sensor 44 of the manual electric transmission control system according to the sixth embodiment fails, which is the same as that of the fourth embodiment (see FIG. 10). Control is performed by changing part of the control. In the fourth embodiment, the shift motor 3
When the drive current of 6 becomes equal to or larger than the second predetermined value which is larger than the first predetermined value (see step 109 of FIG. 10), the striker engages with the detent mechanism in the neutral position (NE position) and does not move further. As a result, it is determined that the drive current has increased, and the shift motor 36 is stopped (see step 110 in FIG. 10).
In this embodiment, the drive time depends on the shift motor 36.
When the second predetermined time, which is sufficient to reach the neutral position, has elapsed since the drive started in the reverse direction (step 108) (step 109A), it is estimated that the neutral position has been reached, and the routine proceeds to the next step 110. ing.
It should be noted that the control for estimating the neutral position and stopping the shift motor 36 after the second predetermined time elapses in this manner is also applicable to the third embodiment and the fifth embodiment. You can

FIG. 14 is a flowchart showing a control procedure when the shift position sensor 44 of the transmission shift control system according to the seventh embodiment fails. In the third to sixth embodiments, the shift to the neutral position (NE position) when the shift position sensor 44 is out of order is more than normal when the motor drive current does not come out of the detent mechanism by the striker of the transmission. Although the operation has been performed with a small current value, if the drive current is such a small value, there is a possibility that the transmission may not come out of the gear when the transmission is in the gear. Therefore, in this embodiment, in order to prevent the state of not getting out of the gear, first, the driving current necessary to get out of the gear is short time, that is, only the time necessary to get out of the gear. The drive motor 36 is supplied to drive the shift motor 36, and then the drive current is set to a small drive current that prevents the striker from slipping out of the detent mechanism.

The control from the neutral position (NE position) to the shift position is the same as in the third to fifth embodiments (step 114 to step 120). In the case of control from the shift position to the neutral position (step 121), the drive direction of the motor is determined from the shift position stored in the memory (step 122), and the striker of the transmission is necessary for getting out of the gear. With the drive current of the third predetermined value, the shift motor 36 is driven for the third predetermined time, that is, the short time required to get out (step 123A), and then the drive current is set so that the striker does not get out of the detent mechanism. Small current (first predetermined value)
(Step 123).

In the next step 124, it is judged whether the drive current has reached the second predetermined value larger than the first predetermined value, and if it is determined that the drive current has reached the second predetermined value, the shift motor 36 is stopped. Then, the neutral position is stored in the memory (step 125) and the shift operation is completed (step 120).

If it is determined in step 124 that the drive current is smaller than the second predetermined value, whether the drive time has passed the fourth predetermined time, which is a time sufficient to shift to the neutral position. (Step 127), if it has not elapsed, the driving with the drive current of the first predetermined value is continued (step 123), and if it is determined that the fourth predetermined time has elapsed, the gear When it is determined that the exit is insufficient, the drive current is driven again for the third predetermined value for the third predetermined time (step 123A). Also in the case of this embodiment, the same effect as that of each of the above embodiments can be obtained.

Next, the learning control method of the target value of the neutral position (N2 position in FIG. 4) in the select line of the position sensor and the NE position in the shift line will be described. If necessary, the description will be made with reference to the drawings used in the control method of the transmission shift control system. In the motor-driven transmission operating device 20, the shift position on the shift line is detected by the shift position sensor 44.
Further, the select position on the select line is detected by the select position sensor 34, and the shift motor 36 and the select motor 28 are respectively controlled to perform the shift control of the transmission.

In this case, each shift position (gear meshing position) (SH1 position or SH2 position in FIG. 4) on both sides of the shift line has a mechanical stopper on the transmission side, and the select line Each select position (N1 position or N3 position in FIG. 4) on both ends of the transmission also has a mechanical stopper on the transmission side. Therefore, at least at those positions, the transmission side stoppers prevent the transmission from moving. A shift position and a select position can be secured.

However, the neutral position (NE position) of the shift line has the detent mechanism on the transmission side, but the driving force of the normal shift motor 36 is larger than the locking force of the detent mechanism. Therefore, it does not stop at that position and passes through, and there is no stopper on the transmission side at positions other than both ends of the select line (N1 position or N3 position) (N2 position in the example of FIG. 4). It cannot be mechanically stopped at the select position (N2 position).

In the conventional pneumatic drive type transmission operating device,
It has a shift actuator and a select actuator, and the piston position of the actuator can be mechanically maintained by variously changing the air pressure supply to these actuators. The main role is to detect when those positions are reached. On the other hand, in the motor-driven transmission operating device 20, when performing the shift or the select operation to the NE position of the shift line and the N2 position of the select line, for example, the outputs of the position sensors 34 and 44 are output at the respective positions. The motors 28 and 36 are controlled so as to reach the preset target values, and their positions are secured.

Therefore, the target value of the output at each position of the position sensors 34, 44 is very important, and if the target values deviate, the shift operation and the select operation cannot be performed in the worst case. There is a risk.

The present invention has been made in order to solve the above-mentioned problems, and has a position sensor 34 at a shift position and a select position (NE position and N2 position in FIG. 4) without a mechanical stopper. The target value of the output of 44 is learned and corrected to always be an accurate target value, and an accurate shift operation,
The purpose is to enable the select operation.

A method of learning the target values of the shift position sensor 44 and the select position sensor 34 according to the present invention will be described. First, the target value learning control of the output of the shift position sensor 44 at the NE position of the shift line is performed as follows. The shift motor 36 is driven by a driving current small enough not to slip out of the detent mechanism of the transmission to be engaged with the detent mechanism of the transmission, and reciprocated by the shift motor 36 within the engagement range of the detent mechanism. By detecting the output range of the shift position sensor 44,
Then, the target value of the NE position is calculated. Basically, the center value of the output range is set as the target value.

Further, the target value learning control of the output of the select position sensor 34 at the intermediate select position (N2 position in the case of the operation pattern of the transmission shown in FIG. 4) other than both ends of the select line is as follows. Do it. Intermediate select position (select line N2 position is the shift line NE
(Position), the shift motor 36 is driven to move a little in the shift direction. Although the shift line of the transmission is engaged when the shift direction is slightly moved in this manner, the shift line is positioned slightly before the synchronization mechanism (synchro mechanism) (before the balk position). In this way, engaging the shift line and positioning it in front of the synchronization mechanism is to move in the select direction to check the range of movement and calculate the target value from that range. This is because the range of movement cannot be detected unless it is done, and when it is engaged with the synchronization mechanism, it cannot be moved in the select direction.

In the above state, the select motor 28 is driven to reciprocate in the select direction, and the range of movement in the select direction at that position is detected, thereby detecting the target value such as the N2 position. Basically, the center value of the range is set as the target value, but if there is a left-right difference in the select direction on the transmission side, the correction is performed accordingly. The learning control is performed once when the vehicle is started.

A specific procedure for the learning control of the target value will be described with reference to the transmission operation pattern shown in FIG. 4 and the flowchart shown in FIG. First, the current shift position and select position are stored in the memory A (step 301), and the shift motor 36 is driven to shift to the NE position (step 302).
To select the N2 position by driving (step 30
3).

Next, the shift motor 36 is driven and moved in a predetermined direction (SH1 direction in this example) (step 3).
04), when the output of the shift position sensor 44 reaches the first predetermined value (when it reaches the position before engaging with the synchronizing mechanism) (step 305), the shift motor 36 is stopped (step 306).

After that, the select motor 28 is driven in the predetermined direction for a first predetermined time (a little longer than the time required to normally contact the side surface of the select line) (steps 307 and 308) to move the select line. The side surface is brought into contact with the side surface and the output of the position sensor 34 for selection at that time is stored in the memory 1 (step 309).

Next, the select motor 28 is driven in the reverse direction for the second predetermined time (step 310, step 3).
11), contact the end of the select line opposite to the end of steps 307 and 308, store the output of the select position sensor 34 at that time in the memory 2 (step 312), and select The motor 28 is stopped (step 313).

Then, the target value of the N2 position is calculated using the output of the select position sensor 34 stored in the memories 1 and 2 (step 314). This calculation basically uses the average value as the target value, but if there is a difference in the intervals between the select positions, the correction is performed to that extent. Then, the calculated value is set to N2 of the position sensor 34 for selection.
It is stored as the target value of the position (step 315).

Next, the shift motor 36 is driven in the NE direction with a drive current having a second predetermined value (a current value at which the detent mechanism cannot be pulled out) (step 316), and the drive current is larger than the second predetermined value. When it reaches the third predetermined value (step 317), the shift position sensor 4 at that time
The output of No. 4 is stored in the memory 3 (step 318).

Next, similarly, the shift motor 36 is driven in the reverse direction with the drive current having the second predetermined value (step 31).
9) When the drive current similarly reaches the third predetermined value (step 320), the output of the shift position sensor 44 at that time is stored in the memory 4 (step 321) and the shift motor 36 is stopped (step 321). Step 322). By the steps 318 and 321, the range of movement in the shift direction within the detent mechanism can be detected.

After that, the target value of the NE position is calculated from the output values stored in the memories 3 and 4 (step 323) and stored as the target value of the NE position of the shift position sensor 44 (step 324). . Basically, the average value (median value) is used as the target value. After that, the shift position and the select position are returned to the initially stored position of the memory A, and the control is completed (step 325). In the above-described embodiment, an example in which the intermediate position of the select line (select positions other than the select positions on both ends) is only the N2 position has been described, but when there are two or more intermediate positions, Repeat steps 301 to 315 by the number of intermediate positions,
The target value at each intermediate position may be learned.

Next, the invention relating to the shift operation control method will be described. In the select operation of the motor-driven transmission operating device 20, there is no particular operational load between the select positions, and it is sufficient that the motor-operated transmission operating device 20 can operate smoothly as quickly as possible. For that purpose, the position control in which the drive current of the select motor 28 is controlled by PWM (pulse width modulation control) to the target position based on the output from the select position sensor 34 is excellent.

On the other hand, in the shift operation, when performing the shift operation from the NE position to each shift position (gear meshing position), it is necessary to perform the synchronous operation in the middle, so that only the simple position control similar to the select operation is performed. Then, the members collide with each other and an impact or an impact sound is generated, so that the smooth operation cannot be performed. Therefore, an object of the present invention is to provide a shift operation control method capable of smoothly performing a shift operation without impact.

The structure of the present invention will be briefly described. When the drive force from the NE position of the shift line to the contact with the synchronizing mechanism, that is, before the balk point is relatively small, the position control is performed to operate as fast as possible.
When a large driving force such as a synchronous operation or a gear meshing operation is required, the output control is performed so that the output can be controlled to a required output so that the shift operation can be performed smoothly.

The outline of the shift operation control is NE
From the position to the position just before the balk point, since the driving force is not so required, the position control is performed based on the output from the shift position sensor 44. Since the largest driving force is required from the position before the balk point to the completion of synchronization, the driving force is gradually increased to the limit limit, and the required driving force is secured to achieve smooth synchronization. From the completion of synchronization to the completion of meshing of gears, a large driving force is not required as in the case of the above-mentioned synchronization, but a certain driving force is required for meshing, so the driving force is gradually reduced and it is impossible to engage during gear meshing. The large driving force does not work.

An example of the procedure of the shift operation control will be described with reference to FIG. 4, FIG. 16 showing a control flowchart, and FIG. 17 showing an example of the operation position of the striker and the control corresponding to the operation position. First, when the shift position is at the NE position (point P in FIG. 17) (step 401) and there is a shift command from the shift lever or the like (step 402),
Based on the command, the drive direction of the shift motor 36 is determined (step 403), and based on the output from the shift position sensor 44, the PWM control is performed to control the drive current of the shift motor 36 to reach the target position. Position control (control A in FIG. 17) is performed (step 404). This position control
When the output is far from the target position, DUT
The Y ratio is increased to operate faster, and as the target position is approached, the DUTY ratio is gradually decreased to reach the target position gently.

When the output of the shift position sensor 44 reaches the first predetermined value (step 405) and reaches the balk point, that is, before the synchronization start point (point Q in FIG. 17), the position control (control A) controls the output. (Control B in FIG. 17) is switched (step 406), and the DUTY ratio is gradually increased to the current limit D.
Increase to UTY ratio (step 407, step 40
8). In this control B, the driving force is gradually increased to the limit in order to perform synchronization as quickly and smoothly as possible.

Then, the stroke is made until the output of the shift position sensor 44 reaches the second predetermined value (step 40
9), it is determined that the synchronization is completed, and in control C, conversely DUTY
The ratio is gradually reduced to a predetermined ratio (step 410, step 411). As mentioned above, since the most driving force is required for synchronization, the driving force is raised to the limit during synchronization, and when synchronization is completed, gear engagement does not require so much driving force, so gradually Reduce the driving force. If the driving force remains large without lowering in this way, an impact may occur when gears are engaged and an impact noise may occur.
In this control C, the driving force is reduced to a required magnitude.

Further, when the output of the shift position sensor 44 reaches the third predetermined value (step 412) and the gear meshing is completed, the DUTY ratio is set to zero to reduce the driving force (step 413) and the shift operation is completed. (Step 41
4). This position is point S in FIG. With the shift operation control method according to this embodiment, the shift operation can be performed smoothly without impact.

[0089]

As described above, according to the invention described in claim 1, the shift motor for performing the shift operation of the transmission, the select motor for performing the select operation, and the position of the striker in the shift direction are detected. Motor-operated transmission operating device having a shift position sensor and a select position sensor for detecting the position of the striker in the select direction, and the shift motor by controlling the operation of the shift motor and the select motor. In a control method of a transmission shift control system including an electric control device for performing shift control of a machine, the shift motor is driven when the vehicle is stopped and the clutch is disengaged when the select position sensor fails. To move the striker to the neutral position, and then drive the select motor to select the striker. Since the shift line at that position is secured by contacting the stopper at the end of the IN, the shift operation is prohibited only after that, and the shift control only for the shift operation is performed. Even if it does, it is possible to travel at least once, and for example, it is possible to travel to a nearby repair shop for repair.

According to the invention described in claim 4, when the shift position sensor fails, the shift operation from the neutral position to the shift position determines the driving direction of the shift motor, and the shift operation is performed. By driving the motor in that direction, the striker is brought into contact with the stopper at the shift position to operate to the shift position,
The shift operation from the shift position to the neutral position determines the drive direction of the shift motor, and the shift motor is driven by a driving force smaller than the force with which the striker moves out of the detent mechanism of the transmission. Since the striker is engaged with the detent mechanism to operate the striker to the neutral position, at least some travel is possible even if the shift position sensor fails. Moreover, it is possible to perform gear shift control that is closer to normal, including the selection operation.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a motor-driven transmission operating device.

FIG. 2 is a sectional view taken along line II in FIG.

FIG. 3 is a control block diagram when a select position sensor fails in the manual electric shift control system according to the embodiment of the present invention.

FIG. 4 is a diagram showing an operation pattern of the transmission.

FIG. 5 is a control flowchart showing a control method according to the first embodiment of the present invention.

FIG. 6 is a control flowchart showing a control method according to a second embodiment.

FIG. 7 is a control block diagram when a shift position sensor fails in the fully automatic shift control system.

FIG. 8 is a first half part of a control flowchart showing a control method according to a third embodiment.

FIG. 9 is the latter half of a control flowchart showing the control method according to the third embodiment and the control method according to the fourth embodiment.

FIG. 10 is a first half of a control flowchart showing a control method according to a fourth embodiment.

FIG. 11 is a first half of a control flowchart showing a control method according to a fifth embodiment.

FIG. 12 is the second half of the control flowchart showing the control method according to the fifth embodiment.

FIG. 13 is a control flowchart showing a control method according to a sixth embodiment.

FIG. 14 is a control flowchart showing a control method according to a seventh embodiment.

FIG. 15 is a control flowchart of target position learning control of a position sensor.

FIG. 16 is a control flowchart of shift operation control.

FIG. 17 is a diagram showing an operating position and control of a striker.

[Explanation of symbols]

28 Selection motor 34 Select position sensor 36 shift motor 44 shift position sensor 54 Electric control device

Front page continued (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16H 59:44 F16H 59:44 59:56 59:56 63:20 63:20 (72) Inventor Tetsuya Isozaki Higashimatsuyama, Saitama Prefecture 2-11-6, Shinmeicho, Ichi, Bosch Brake System Co., Ltd. (72) Inventor Masao Kono 2-11-6, Shinmeicho, Higashimatsuyama City, Saitama Bosch Brake System Co., Ltd. F-term (reference) 3J067 AA01 AB23 AC01 BA52 BA53 BA56 DB32 FA36 FA84 FB73 FB76 GA01 3J552 MA01 MA13 NA01 NB01 PB03 RA02 SA01 SB03 SB12 VA41Z VA62W VA62X VB01Z

Claims (11)

[Claims] 1. A shift motor for performing a shift operation of a transmission, a select motor for performing a select operation, a shift position sensor for detecting a position of a striker in a shift direction, and a position of the striker in a select direction. A transmission including a motor-driven transmission operating device having a select position sensor for controlling the transmission, and an electric control device for controlling the operation of the shift motor and the select motor to perform shift control of the transmission. In the control method of the control system, when the select position sensor has a failure, when the vehicle is stopped and the clutch is disengaged, the shift motor is driven to move the striker to a neutral position, and then the select Drive the drive motor to bring the striker into contact with the stopper at the end of the select line, Ensuring Futorain, thereafter prohibits the select operation, the control method of the transmission shift control system and performing a shift control of the shift operation only. 2. The control method of the transmission shift control system according to claim 1, wherein the select motor is driven for a predetermined time and then stopped, and the striker is brought into contact with the stopper at the end of the select line. A transmission gear shift control system characterized by: 3. The control method for a transmission shift control system according to claim 1, wherein the select motor is driven, and when the drive current reaches or exceeds a predetermined value, the select motor is stopped and the striker is turned on. A transmission shift control system characterized in that it is brought into contact with the stopper at the extreme end of the select line. 4. A shift motor for performing a shift operation of a transmission, a select motor for performing a select operation, a shift position sensor for detecting a position of a striker in a shift direction, and a position of the striker in a select direction. A transmission including a motor-driven transmission operating device having a select position sensor for controlling the transmission, and an electric control device for controlling the operation of the shift motor and the select motor to perform shift control of the transmission. In the control method of the control system, when the shift position sensor fails, the shift operation from the neutral position to the shift position determines the driving direction of the shift motor, and drives the shift motor in that direction, The striker is brought into contact with the stopper at the shift position to operate to the shift position, The shift operation from the position to the neutral position determines the drive direction of the shift motor, and the striker is driven by driving the shift motor with a driving force smaller than the force with which the striker exits the detent mechanism of the transmission. Is engaged with a detent mechanism to operate the striker to a neutral position. 5. The transmission shift control system control method according to claim 4, wherein the shift position of the transmission after the shift operation is stored in a memory, and the memory stores the shift position in the next operation. ,
A control method for a transmission shift control system, comprising: determining whether the transmission is in a neutral position or a shift position and determining a driving direction of the shift motor. 6. The control method of the transmission shift control system according to claim 4, wherein the shift operation from the neutral position to the shift position is stopped after driving the shift motor for a predetermined time,
A transmission shift control system control method, wherein the striker is brought into contact with the stopper at the shift position. 7. The control method of the transmission shift control system according to claim 4, wherein the shift operation from the neutral position to the shift position is stopped when the drive current of the shift motor becomes a predetermined value or more, A transmission shift control system control method, wherein the striker is brought into contact with the stopper at the shift position. 8. The control method of the transmission shift control system according to claim 4, wherein the shift operation from the shift position to the neutral position is performed by driving the shift motor for a predetermined time or more. A method for controlling a transmission shift control system, comprising: determining that a neutral position has been reached. 9. The control method for a transmission shift control system according to claim 4, wherein in the shift operation from the shift position to the neutral position, the drive current of the shift motor exceeds a predetermined value. Accordingly, it is determined that the neutral position has been reached, and a transmission shift control system control method. 10. The control method of the transmission shift control system according to claim 4, wherein the operation from the shift position to the neutral position causes the shift motor to come out of the gear of the transmission. A method for controlling a transmission shift control system, which comprises driving the detent mechanism with a driving force that is smaller than a force for pulling out the detent mechanism after driving the detent mechanism with a necessary driving current for a time required for pulling out. 11. The control method for a transmission shift control system according to claim 1, wherein when the select position sensor or the shift position sensor fails, an alarm is issued to notify the driver. Control method for a transmission shift control system characterized by: