JP2813934B2 - Control device for sheave actuator drive motor in V-belt continuously variable transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a sheave actuator driving motor in a V-belt type continuously variable transmission.

[0002]

2. Description of the Related Art Conventionally, in a V-belt type continuously variable transmission of this type, an input sheave attached to an input sheave shaft driven by an engine, an output sheave attached to an output sheave shaft, and an input sheave. A V-belt wound around the output sheave and at least one of the input sheave and the output sheave (usually the input sheave), the interval between the sheaves being variable. Such a variable sheave generally includes a fixed sheave and a movable sheave, and the movable sheave is configured to be movable with respect to the fixed sheave via a drive motor by an actuator.

[0003]

The above-described actuator drive motor is controlled by a control device in accordance with the driving situation. In particular, when the shift control is performed on the upshift side, that is, the sheave interval is reduced. When trying to move the movable sheave to the narrowing side, for example, the motor is locked even if power is supplied to the motor due to insufficient motor output or an abnormality in the actuator, etc. May not be possible. If such a state continues, there is a problem that the motor is seized or a related component such as an actuator fails.

[0004]

In order to solve the above-mentioned problems, a control apparatus for a sheave actuator driving motor in a V-belt type continuously variable transmission according to the present invention comprises an input sheave shaft mounted on an input sheave shaft driven by an engine. Sheave and
An output sheave attached to an output sheave shaft, and a V-belt wound between the input sheave and the output sheave, wherein a distance between at least one of the input sheave and the output sheave is variable. A V-belt type continuously variable transmission, comprising: an actuator for relatively moving a sheave portion constituting at least one of the sheaves. A control device for a drive motor for driving the actuator, comprising: When the locked state of the drive motor is detected based on the change of the drive motor, the duty ratio of the drive motor is increased, and when the locked state is not resolved, the drive motor is stopped.

[0005]

In the control device for the sheave actuator driving motor in the V-belt type continuously variable transmission according to the present invention, when the lock state of the drive motor is detected, the duty ratio to the drive motor is first increased to temporarily lock the drive motor. If so, the locked state can be eliminated by this, and if the locked state still cannot be eliminated, the drive motor can be stopped.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. In the V-belt type continuously variable transmission shown in FIG.
An output shaft 10 of a prime mover E such as an engine is connected to a coaxial main drive shaft 14 via a clutch 12. A bearing 16 is provided in front of the main drive shaft 14.
The input sheave shaft 18 is further coaxially arranged via the.

On the side of the main drive shaft 14 and the input sheave shaft 18, a shaft 22 of a synchro coupling 20 for switching between forward and backward is installed in parallel, and a counter driven gear 24 fixed to the shaft 22 is a main drive shaft. The main drive gear 26 is fixed to the main drive gear 26. Synchro coupling 20
The forward counter gear 28 and the reverse counter gear 30 to which the rotation of the shaft 22 is transmitted when switching to the forward side and when switching to the reverse side, respectively.
The forward counter gear 28 meshes with the input sheave shaft gear 32, while the reverse counter gear 30 meshes with a second sheave shaft gear 34 fixed to an intermediate portion of the input sheave shaft 18. And are engaged.

At the front of the input sheave shaft 18, an input fixed sheave 38 fixed to the input sheave shaft 18 and an input movable sheave 40 slidably mounted in the axial direction with respect to the input sheave shaft 18 are provided. An actuator 42 for adjusting the axial position of the input sheave 40 is provided.

On the other hand, on the side of the input sheave shaft 18, an output sheave shaft 44 is disposed in parallel with the input sheave shaft 18, and the output sheave shaft 44 has an output fixed sheave fixed to the output sheave shaft 44. 46, and an output movable sheave 48 attached to the output sheave shaft 44 so as to be slidable in the axial direction.

The input fixed sheave 38 and the input movable sheave 40 have a conical surface on the side facing each other, and form a V-shaped groove 50 therebetween.
Similarly, the output fixed sheave 46 and the output movable sheave 48 have conical surfaces on opposite sides to form a V-shaped groove 56 therebetween, and the two form an output sheave 58. A V-belt 60 is wound between the input sheave 52 and the output sheave 58, and the position of the input movable sheave 40 is adjusted by the actuator 42 to change the width of the V-shaped groove 50 so that the input can be changed. The speed ratio of the rotation of the output sheave shaft 44 to the rotation of the sheave shaft 18 is continuously variable.

An intermediate shaft 86 is disposed between the input sheave shaft 18 and the output sheave shaft 44, and a two-way differential clutch 88 is mounted on the intermediate shaft 86. This 2
The directional differential clutch 88 has an input gear 90 that meshes with the input sheave shaft gear 32 of the input sheave shaft 18, and an output gear 94 that meshes with a driven gear 92 fixed to the output sheave shaft 44.
When the rotation of the input gear 90 is faster than the rotation of the input gear 90, the output gear 94
When the rotation of the input gear 90 is slower than the rotation of the input gear 90, the rotation of the input gear 90 is transmitted to the output gear 94 via the intermediate shaft 86.
The configuration of the differential clutch 88 itself is well known, and a detailed description thereof will be omitted.

Further, a differential pinion 96 is fixed to the output sheave shaft 44. The differential pinion 96 meshes with a differential idler gear 98, and the differential idler gear 9
8 is the differential gear 1 of the differential device 100
02 is engaged.

Reference numeral 104 denotes a control device comprising a microprocessor. An input sheave rotation speed sensor 106 for detecting the rotation speed of the input sheave 52, an output sheave rotation speed sensor 108 for detecting the rotation speed of the output sheave 58, and an input to the input sheave 52. Signals from a sheave position detection sensor 110 for detecting the position of the movable sheave 40, a shift position sensor (not shown) of the selector 112, a vehicle speed sensor (not shown), and the like are input. The drive motor of the actuator 42 for moving the sheave 40 is controlled to control the gear ratio to a target value suitable for the driving situation.

Here, the control device 104 of the present embodiment controls the drive motor for the input movable sheave 40 based on the signals from the sensors described above (hereinafter simply referred to as "normal control"), and particularly on the shift-up side. It is configured to perform control for coping with a locked state of the drive motor, which is likely to occur when shifting control is performed, that is, when moving the movable sheave 40 to the side where the sheave interval is reduced. This will be described below based on the flowchart shown in FIG.

First, in step S1, it is determined whether or not the change in vehicle speed is equal to or less than a predetermined value based on a signal from the vehicle speed sensor. If NO, the flow proceeds to step S2 to perform normal control, and if YES, the flow proceeds to step S3. It is determined whether or not the change in the target gear ratio to be controlled is equal to or less than a predetermined value. If the change in the target gear ratio is equal to or less than the predetermined value in step S3, that is, if YES, the process proceeds to step S4, and if NO, the process proceeds to step S2 to perform the normal control as before. In step S4, it is determined whether or not the change in the difference between the target gear ratio and the actual gear ratio calculated based on the signals from the input sheave rotation speed sensor 106 and the output sheave rotation speed sensor 108 is equal to or less than a predetermined value. If YES, the process proceeds to step S5, and if NO, the process proceeds to step S2 to perform normal control. In step S5, steps S1 to S1 are performed.
It is determined whether or not a predetermined time has elapsed after the requirement of S2 has been satisfied. If YES, the process proceeds to step S6, where the duty ratio of the motor, that is, the energizing ratio, is gradually increased at a predetermined ratio. Return to Step S
At 7, it is determined whether or not the duty ratio of the motor has reached 100%. If the duty ratio has not reached 100%, the process returns to step S1. If the duty ratio has reached 100%, the process proceeds to step S8. In step S8, the drive motor is stopped, and at the same time, the abnormality display lamp is made to blink.

As described above, the duty ratio of the motor is gradually increased to 100% at the above ratio. However, the stop of the drive motor and the display of the abnormality in step S8 indicate that the duty ratio once reaches 100%. Thereafter, it is preferable to increase the ratio again from 0 to 100% at the same ratio, and to perform the operation when the requirements of steps S1 and S3 to S5 are still satisfied. Further, it is preferable that the abnormality indicating lamp is configured to be turned on and off at predetermined intervals.

That is, the control device 104 of the present embodiment
The lock state of the drive motor is determined based on four factors: vehicle speed change, target gear ratio change, change in the difference between the target gear ratio and the actual gear ratio, and elapsed time. If the lock state is determined, the duty of the drive motor is determined. The lock ratio is eliminated by increasing the ratio, and if the lock state is still not eliminated, the drive motor is stopped to prevent the motor burn-in, and at the same time, the abnormality display lamp flashes to notify the vehicle driver of the abnormal state. This allows the driver to visually detect the abnormal condition and quickly take measures such as stopping the vehicle for repair.

[0018]

According to the control apparatus of the motor for driving the sheave actuator in the V-belt type continuously variable transmission according to the present invention, the duty ratio of the drive motor is increased, and if the lock state is temporary, the lock state is established. The drive motor can be stopped when the locked state is still not resolved, so that the motor locked state can be quickly dealt with, and the drive motor can be prevented from burning.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a V-belt type continuously variable transmission including a sheave actuator driving motor control device according to an embodiment of the present invention.

FIG. 2 is a flowchart of control by the control device of FIG. 1;

[Explanation of symbols]

 E Primer 18 Input sheave shaft 38 Input fixed sheave 40 Input movable sheave 42 Actuator 44 Output sheave shaft 52 Input sheave 58 Output sheave 60 V belt 104 Control device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16H 63:06 (72) Inventor Sadao Yamada 7-22 Minami Ichibancho, Atsuta-ku, Nagoya-shi Aichi Machine Industry Co., Ltd. (56 References JP-A-3-20160 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16H 61/12 F16H 9/00 H02H 7/093

Claims (1)

(57) [Claims] 1. An input sheave attached to an input sheave shaft driven by an engine, an output sheave attached to an output sheave shaft, and a V belt wound between the input sheave and the output sheave. A V-belt type continuously variable transmission having an actuator for arranging at least one of the input sheave and the output sheave at a variable interval and relatively moving a sheave portion forming the at least one sheave. Machine, a control device of a drive motor for driving the actuator,
A V-belt type wherein when the locked state of the drive motor is detected based on a change in vehicle speed or the like, the duty ratio to the drive motor is increased, and the drive motor is stopped if the locked state is not resolved. Control device for sheave actuator drive motor in continuously variable transmission.