JPH0510435A - Motor-driven shift controller - Google Patents

Abstract

PURPOSE:To enable fixing into a shift position coinciding with the vehicle operating state at the abnormality generated time in the case of abnormality being generated to a control system in a motor-driven shift controller for driving a motor on the basis of the shift command of a control switch or the like so that speed change action is performed electrically. CONSTITUTION:A speed change plate 2 is provided with a cutout hole 2g in the lined-up direction of locking grooves 2a-2f. At the abnormal time of a control system, a solenoid 33 is operated off, and the tip part of a stopper 32 is recessed into the cutout hole 2g. In this state, the plate 2 is moved to the left in the drawing in the case of a shift position being placed in P, R, N positions, and a locking ball 3 is locked into a locking groove 2c in the N-position so as to be fixed into the N-shift position. The plate 2 is moved to the right in the case of D, S, L positions, and the locking ball 3 is locked into a locking groove 2d in the D-position so as to be fixed into the D-position. Safety in the case of not performing forward travel can be thereby secured, while speed reducing performance can be secured by the D-range position during forward travel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shift control device for electrically shifting a motor or the like based on an operation of an operation switch or the like without mechanically coordinating a shift operation of a driver. The present invention relates to the improvement of the control system, and in particular, to the shift countermeasure when the control system is abnormal.

[0002]

2. Description of the Related Art Conventionally, as an electric shift control device of this type, as disclosed in, for example, Japanese Patent Publication No. 62-30509, a shift command circuit for instructing a shift based on a driver's operation, and a D A shift positioning member for selecting and determining a shift position such as (a plurality of automatic gear shift) range position, N (neutral), R (reverse) range position, and the shift positioning so that the shift position is commanded by the shift command circuit. A control circuit that controls the movement of a member by an actuator is known.

[0003]

By the way, in the above-mentioned prior art, when the shift command circuit or the control circuit is abnormal, the shift position cannot be selected to the position desired by the driver.
It is necessary to take measures against it.

In that case, a positioning spring or the like is used,
It is conceivable that when the control system is abnormal, the shift positioning member is forced to shift to the N position by the positioning spring or the like.

However, according to the above-mentioned idea, the shift position forcibly positioned at the time of abnormality is limited to one predetermined shift position. Therefore, for example, when an abnormality occurs while the vehicle is traveling on a downhill. When the shift position is forcibly shifted to the N position, the engine brake does not act and good deceleration performance cannot be obtained. In consideration of such a situation, when the shift position at the time of abnormality is forcibly set to the D range position, for example, if an abnormality occurs at the time of selecting the P range position, the vehicle may be inadvertently traveling forward. Occurs. As described above, in the above-mentioned idea, there is a possibility that the shift position cannot be selected according to the driving state of the vehicle when the abnormality occurs.

The present invention has been made in view of the above points, and an object thereof is to adopt a structure in which a shift position of a transmission to be forcibly shifted when an abnormality occurs can be arbitrarily selected. The purpose is to select an appropriate shift position even when the control system is abnormal.

[0007]

In order to achieve the above object, a concrete solving means of the present invention is a shift command means for instructing a shift, a shift positioning means for determining a shift position, and the shift command means. It is premised on an electric shift control device provided with a control means for controlling the actuator of the shift positioning means so as to obtain a commanded shift position. And a stopper means for restricting the operating position of the shift positioning means to a position corresponding to the set shift position, and selectively driving the stopper means to a restricting position where the shift positioning means is restricted and a non-regulating position. And a drive means for controlling the drive means so as to position the stopper means at the regulation position when the shift command means or the control means is abnormal, and the shift positioning means is regulated by the stopper means. An abnormal time control means for driving the actuator is provided.

[0008]

In the present invention, when the control system is normal, when the shift command means commands a desired shift position, the control means drives and controls the actuator so that the shift positioning means causes the desired shift position. Since it is positioned at the position, the shift position of the transmission is automatically selected to the shift position desired by the driver.

On the other hand, when the shift command means or the control means is abnormal, automatic shift position selection by these devices becomes impossible. However, when the control system is abnormal, the abnormal-time control means operates, the driving means moves the stopper means to the regulation position, and the actuator is driven to bring the shift positioning means into contact with the stopper means. Regulated in position. Therefore, if a plurality of restriction positions of the stopper means are set or a plurality of stopper means are provided, the shift position of the transmission at the time of abnormality can be forcibly positioned at the shift position according to the operating state of the vehicle at the time of the abnormality. Will be possible.

[0010]

As described above, according to the electric shift control device of the present invention, the shift position of the transmission, which should be forcibly selected when the control system is abnormal, can be arbitrarily selected. When the control system is abnormal, you can select the shift position that matches the operating condition of the vehicle when the abnormality occurs, and even if the control system is abnormal, you can apply the engine brake or stop the vehicle when traveling downhill. It is possible to prevent the vehicle from inadvertently starting to travel, and to improve the drivability and safety of the vehicle when the control system is abnormal.

[0011]

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

FIG. 1 shows a schematic structure of a shift mechanism, in which 1 is a locking groove 2a to 2f corresponding to each range position of P, R, N, D, S and L on the outer circumference (see also an enlarged view of FIG. 6). ), The fan-shaped plate 2 and each locking groove 2 of the plate 2
It is a ratchet including a locking ball 3 that selectively locks a to 2f. A shaft 4 that rotates according to the rotation of the plate 2 is connected to the plate 2 of the ratchet 1, and the locking ball 3 is provided with the locking groove 2 a of the plate 2.
The shift positioning means 5 is configured such that the shaft 4 is rotated by an amount corresponding to the position where it is locked to 2f, and the shift position of the transmission (not shown) is determined according to the amount of rotation. ..

An assist lever 6 is rotatably connected to the plate 2, and a rod 7 is rotatably connected to the lever 6. Below the rod 7,
A motor 8 is connected to move the rod 7 in its axial direction. The motor 8 constitutes an actuator for rotating the plate 2 of the ratchet 1 through the rod 7 and the assist lever 6 to operate the shift positioning means 5. In the figure, 10 is a parking gear and 11 is a parking pole.
A projecting tooth 11 a that engages with a tooth groove of the parking gear 10 is formed at one end of the No. 1 and the other end is arranged immediately above the rod 7. Then, when the P shift position for locking the locking ball 3 in the P locking groove 2a of the plate 2 of the ratchet 1 is selected, the parking cam 12 arranged on the rod 7 is moved by the movement of the rod 7 to cause the parking pole 11 to move. Lifting the other end upward, the protruding tooth 11a
Is engaged with the tooth groove of the parking gear 10.

FIG. 2 shows a control circuit for controlling the motor 8. In the figure, 15a to 15d detect the shift position requested by the driver, and the detection signals φA to φD are detected.
Are operated as shift command means, and four operation switches 16a to 16d detect which of the engaging grooves 2a to 2f the engaging ball 3 of the ratchet 1 is engaged with. Position sensor, the output signals φA to φD, φ1 to φ4 of the above respective sensors are internally CP
It is input to the controller 18 having U and the like. A driver 19 of the operation control motor 8 of the ratchet 1 is connected to the controller 18, and the driver 19 is composed of, for example, the circuit shown in FIG.

Next, a specific structure of the electric shift control by the controller 18 will be described with reference to FIGS. As shown in FIG. 3, the operation switch 15 a includes a photocoupler 15 ax, and an operation rod 20 operated by a driver is located between the light emitting element 15 ay and the light receiving element 15 az. Formed hole 2
0a outputs an H level signal when the light positioned at the position of the photocoupler 15ax is transmitted. On the other hand, in the controller 18, the inverter 1 that inverts the H level signal is used.
8a is provided. Although the operation switch 15a has been described above, the other operation switches 15b to 15d have the same configuration. Then, as shown in FIG. 4, the controller 18 outputs the signal φA of the four operation switches 15a to 15d.
Depending on the combination of ~ φD, the commanded shift position is P,
It is configured to recognize that each shift position is R, N, D, S or L. Here, four kinds of signals φA ~
φD is set so that two signals in it are always at H level and the other two signals are at L level. Therefore, with the above configuration, the shift positions instructed by the operation switches 15a to 15d are grasped based on the combination of FIG. 4, and the output signals φ1 to φ1 to the driver 19 are set so as to reach the required shift positions.
The control means 24 is constructed so as to generate φ4 and drive and control the motor 8 for rotating the plate 2 of the ratchet 1.

In FIG. 2, the controller 18 controls the automatic shift at the D, S and L shift positions.
Each detection signal of the brake switch 25 and the vehicle speed sensor 26 is input.

Then, the above-mentioned operation switches 15a to 15
A configuration for coping with an abnormality in the control system such as a failure of the d or the position sensors 16a to 16d will be described. As shown in FIG. 6, the plate 2 of the ratchet 1 has locking grooves 2a to 2f.
Of the cutout holes 2g provided in the row direction of the
Guide lot 3 located at g and rotating integrally with the plate 2
0 and are provided. Then, in the vicinity of the plate 2, a rod-shaped stopper means 32 for restricting the operating position of the plate 2 to a position corresponding to the set shift position is arranged so that its tip can be projected and retracted in the cutout hole 2g of the plate 2. The electromagnetic solenoid 3 is provided at the rear end of the stopper means 32.
3 is connected, and when the electromagnetic solenoid 33 is turned on, the stopper means 32 is resisted against the biasing force of the internal spring 33a.
Is sucked in and the tip thereof is positioned at the non-regulating position where the tip is escaped from the cutout hole 2g.
The driving means 34 is arranged so that the tip end of the stopper means 32 is positioned by the biasing force of the
Are configured.

Further, in FIG. 2, 37 is a failure switch, and the failure switch 37 is the controller 1 described above.
8 is when the two signals φA to φD of the operation switches 15a to 15d are not at the H level, or the position sensor 1
When any one of 6a to 16a is out of order, it is controlled to be opened by the controller 18 or manually by the driver. From the controller 18 to the driver 19
Switch 38a provided on the signal output path to the
To 38d are connected to each other, and the respective changeover switches 38a to 38d are connected.
Respectively operate to switch from the normal position to the failure position when the failure switch 37 is opened.

The normal position of each of the changeover switches 38a to 38d is connected to the controller 18, while the faulty position is connected to an abnormal condition control circuit 40 for outputting a control signal to the driver 19 when the control system is abnormal. There is. The abnormal time control circuit 40 has a transistor 41, the level signal of which is input to the φ1 terminal and φ2 terminal of the driver 19 via the inverter 42, and is directly input to the remaining φ3 terminal and φ3 terminal. The transistor 41 receives a signal from the controller 18 to the base when the control system is abnormal, the signal being at the H level when the shift position of the transmission is at the P, R and N positions, and at the D, S and L positions. When it is at the L level. Further, the exciting coil 33a of the electromagnetic solenoid 33 is connected in series to the failure switch 37, and the failure switch 37 is turned on by closing the failure switch 37. In FIG. 2, reference numeral 43 is a display lamp for lighting and displaying the abnormality when the control system is abnormal.

Therefore, with the above configuration, when the control system such as the operation switches 15a to 15d or the position sensors 16a to 16d is abnormal, the electromagnetic solenoid 33 is turned off based on the opening operation of the failure switch 37 to stop the stopper means 32.
Is positioned at the regulation position, the tip thereof is inserted into the cutout hole 2g of the plate 2, and the changeover switches 38a to 38a.
d is switched to the failure position, the motor 8 is driven based on the output of the abnormal control signal from the abnormal control circuit 40, and the plate 2 of the ratchet 1 is positioned at the position regulated by the stopper means 32. The abnormal time control means 45 is configured.

Therefore, in the above embodiment, when the control system is normal, the changeover switches 38a to 38d are in the normal position, and the electromagnetic solenoid 33 is in the failure switch 37.
ON control is performed by the closing operation of, and the stopper means 32 is positioned at the non-regulating position. The controller 18 uses the shift command signals φA to the four operation switches 15a to 15d.
Output signals φ1 to φ4 are output to the driver 19 so that the command shift position corresponding to the combination of φD is obtained, whereby the motor 8 is driven and the plate 2 of the ratchet 1 is rotated. Then, the engaging grooves 2a to 2 corresponding to the command shift position
When the locking ball 3 is engaged with e or 2g, the position sensor 1
Based on the outputs of 6a to 16d, the output from the controller 18 is stopped, the rotational drive of the motor 8 is stopped, and the electric shift is completed.

On the other hand, the operation switches 15a to 15d
When the control system is abnormal, such as when the
Is opened, the electromagnetic solenoid 33 is turned off, the stopper means 32 is positioned at the restricting position, and the tip of the stopper means 32 is inserted into the notch groove 2g of the plate 2. On the other hand, along with the opening operation of the failure switch 37, the changeover switch 38a
38d are switched to the failure position, and the control signal from the abnormal time control circuit 40 is input to the driver 19. Here, when the shift position at the time of occurrence of an abnormality is the P, R, or N position, that is, when there is no intention of normal forward traveling, the transistor 42 is turned on and the signal φ1 = φ2 = H level is obtained. , The signal φ3 = φ4 = L level, and the motor 8 rotates in the normal direction. As a result, the plate 2 in FIG. 6 rotates to the left in the same figure, the guide rod 30 comes into contact with the right end of the stopper member 32 in the figure, and the position shown in FIG. It is regulated at the position where the engaging ball 3 is engaged with 2c, and the shift position of the transmission is forcibly and selectively switched to the N position. Therefore, good safety is ensured in a situation where the vehicle does not travel forward.

On the other hand, when the shift position at the time of occurrence of an abnormality is the D, S or L position, that is, when the vehicle is normally traveling forward, the transistor 42 of the abnormality control circuit 40 is turned off,
This time, signal φ1 = φ2 = L level, signal φ3 = φ4 = H
At the level, the motor 8 reversely rotates in the opposite direction to the above, and the plate 2 rotates rightward with the same 6. Here, since the guide rod 30 is located to the left of the stopper member 32 in the drawing, the plate 2 is brought into contact with the left end of the stopper member 32 by the rotation of the plate 2 in the right direction. D
Since the locking ball 3 is restricted at the position where the locking ball 3 is locked in the locking groove 2d, the shift position is forcibly and selectively switched to the D position. Therefore, good deceleration performance is ensured during forward traveling, especially during downhill traveling.

FIG. 7 shows a modification of the abnormal condition control circuit 40 in which an abnormal condition driver 19 'is provided. In this modification, the drivers 19 and 19 for normal time and abnormal time are provided.
The changeover switches 38a ', 38b' are arranged on the side of the motor 8'to select the driver appropriately. The other structure is the same as that of the above embodiment. Therefore, according to this modified example, even when the driver 19 for normal operation is abnormal, the driver 19 'for failure can handle it.

FIG. 8 shows a modified example in which the plate 2 is restricted by the stopper means 32, and the notch hole 2g 'is formed into the N locking groove 2.
This notch hole 2g 'is formed in a portion corresponding to between the locking groove 2d of c and D, and the stopper means 32 which is recessed in this hole 2g'.
It is configured so that the position of the plate 2 is regulated by the engagement with ′. Therefore, according to this modification, the configuration can be simplified as compared with the above-described embodiment. In the figure,
50 is a wheel provided at the tip of the stopper means 32 '.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an electric shift mechanism.

FIG. 2 is a diagram showing a control circuit for an electric shift.

FIG. 3 is a diagram showing a specific configuration of an operation switch and an input system of its signal.

FIG. 4 is a diagram showing a map of command shift positions corresponding to combinations of operation signals.

FIG. 5 is a diagram showing a specific circuit of a driver.

FIG. 6 is an enlarged view of a ratchet plate.

FIG. 7 is a diagram showing a modified example of the abnormal-time control circuit.

FIG. 8 is a view showing a modified example of engagement of stopper means with respect to a cutout hole of a plate.

[Explanation of symbols]

 1 Ratchet 2 Plate 5 Shift Positioning Means 8 Motor (Actuator) 15a to 15d Operation Switch (Shift Command Means) 24 Control Means 32, 32 'Stopper Means 33 Electromagnetic Solenoid 34 Driving Means 37 Failure Switch 45 Abnormal Time Control Means

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Claims (1)

Claim: What is claimed is: 1. A shift command means for commanding a shift, a shift positioning means for determining a shift position, and an actuator of the shift positioning means for controlling the shift position to be a commanded position by the shift command means. In an electric shift control device including control means, stopper means for restricting an operating position of the shift positioning means to a position corresponding to a set shift position, and restriction for restricting the stopper means by the shift positioning means When the drive means for selectively driving the position and the non-regulating position and the shift command means or the control means are abnormal, the drive means is controlled so as to position the stopper means at the regulating position, and the shift positioning means stops the stopper. And an abnormal-time control means for driving the actuator so as to be regulated by the means. An electric shift control device characterized by the above.