JPH0643192B2 - Spoiler device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a spoiler device with variable wind resistance.

[Explanation of Prior Art] As a conventional spoiler device, for example, the actual exploitation of Sho 57-59
There is one as shown in Japanese Patent No. 189 (front spoiler device).

This publication discloses a front spoiler device in which a spoiler movable by one motor can be retracted and retracted in accordance with the vehicle speed in a skirt portion of a vehicle front part.

By the way, in the front spoiler device described in the above publication, the spoiler is driven by one motor. However, there are cases where it is desired to drive both ends of the spoiler by two motors depending on the driving load amount and the size of the device.

However, when an attempt is made to drive the spoiler with two motors in this way, a difference in drive amount may occur between the two motors. This occurs, for example, when one motor fails or when the load on the spoiler end increases due to some cause.
And if there is a difference in the drive amount of the two motors,
There is a risk that the spoiler will be greatly twisted or given force to be destroyed. In addition, there is a possibility that the motor will be operated unreasonably or seizure will occur.

[Object of the Invention] The present invention solves the above problems and does not give a large twist or a destructive force to the spoiler even if both ends of the spoiler are driven by two motors. It is an object to provide a spoiler device that can be operated.

[Summary of the Invention] In order to achieve the above object, the present invention provides a spoiler rotatably supported around a fulcrum, and two motors for individually rotating both end positions of the spoiler around the fulcrum. When the vehicle speed becomes equal to or higher than a predetermined value or when the vehicle speed becomes lower than the predetermined value, the two motors drive the spoiler in the forward or reverse directions. A drive command circuit that simultaneously outputs drive command signals to the drive system of the motor, and when the two motors are rotated based on the drive command signals that are simultaneously output from the drive command circuit, Both the current passage start time difference and the current amount difference are detected for the respective currents flowing in the drive systems, and when the current passage start time difference becomes a predetermined time or more, or the current amount difference is A motor rotation amount detection circuit that determines that a rotation difference of a predetermined amount or more has occurred between the two motors when the amount exceeds a predetermined amount, and a motor rotation amount detection circuit that detects a rotation amount of a predetermined amount or more for the two motors. And a circuit for stopping both output of drive command signals from the drive command circuit to the drive systems of the two motors when it is determined that a rotation difference has occurred.

[Description of Embodiments] An embodiment of the present invention will be described below.

FIG. 1 is a perspective view of a vehicle showing a mounting position of a front spoiler.

The front spoiler 1 is movably attached so as to form a part of a skirt portion below the bumper 5 at the front of the vehicle 3.

FIG. 2 is a perspective view showing a mounting structure of the spoiler 1 to the vehicle body.

A arm 7 for rotatably supporting the spoiler 1 is attached to the center of the rear surface of the spoiler 1, and a fulcrum hole is provided above the arm 7. A bracket 9 is fixed on the vehicle body side at a position corresponding to the armrest 7, and a bolt 11 is inserted through a hole provided in the bracket and the fulcrum hole, and a nut 13 is used. The bolt 11 is fixed so that the spoiler 1 is supported rotatably around the fulcrum.

On the other hand, on the left and right ends of the back surface of the spoiler 1,
7 are provided, and the arm holes 15 and 17 are provided with action holes at positions eccentric to the fulcrum holes. The driven links 19 and 21 are attached to these action holes. Left side motors M _L and right side motors M _R are provided with fixed stators at vehicle body positions corresponding to the arms 15 and 17. The drive links 23 and 25 are attached to the movers of these motors through an appropriate speed change mechanism. Then, the driven links 19 and 21 and the drive link 2 are formed by using bolts and nut members as shown in the drawing.
3, 25 are joined together, and the spoiler 1 is configured to rotate around the fulcrum as the motors M _L and M _R rotate.

FIG. 3 shows a block diagram of the electric circuit.

The electric circuit includes the drive command circuit 27, the motor M _L and the motor M.
Two relay drive circuits 29 and 31 for _R and a relay 3
3, 35, position switches 37 and 39, spoiler position determination circuits 41 and 43, and a motor rotation amount difference detection circuit 45.

The drive command circuit 27 is configured to interlock with a vehicle speed sensor,
When the vehicle speed becomes equal to or higher than a predetermined value or when the vehicle speed becomes lower than the predetermined value, two types of drive command signals for driving the spoiler in the forward or reverse direction are output. The drive command signal is simultaneously output to the two motors M _L and M _R.

The relay drive circuits 29 and 31 input one of the two types of drive command signals from the drive command circuit 27, and relay 33 until the spoiler position determination circuits 41 and 43 receive a signal to reach the upper or lower limit position. , 35 are controlled to a predetermined state. That is, for example, when the forward drive (increase) command signal is input from the drive command circuit 27, the relay drive circuits 29 and 31 rotate the motor M _L until the upper limit reaching signals are input from the spoiler position determination circuits 41 and 43. , M _R are controlled to drive the relays 33, 35 in the forward direction.

On the contrary, when driving the spoiler in the reverse direction (downward), the relay drive circuits 29, 31 drive the motors M _L , M _R in the reverse direction until receiving the lower limit reaching signal from the spoiler position determination circuit. Control the relays 33 and 35 so that

The relays 33 and 35 have two coils and two contacts that are operated by energizing the coils, and both the coils are not energized to stop the motors M _L and M _R. Further, by energizing either one of the coils, the motors M _L and M _R can be driven in the forward and reverse directions.

The position switches 37, 39 are brushes 37a, 39a which are fixedly rotated with the motor rotating shaft and slip rings 37b, 39b for determining the upper limit position of the spoiler, and a slip ring 37c for detecting the lower limit position of the spoiler.
39c. Spoiler position determination circuit 41, 4
3 receives signals from these position switches 37 and 39, determines from the state of the input signals whether the spoiler is at the lower limit position, the intermediate position, or the upper limit position, and the relay drive circuit An upper limit or lower limit position arrival signal is output to 29 and 31.

The motor rotation amount difference detection circuit 45 is connected to the ground lines L ₁ and L ₂ of the relays 33 and 35 and detects the state of current flowing through these ground lines L ₁ and L ₂ . In this example, the time difference | t ₁ −t ₂ | is detected by detecting both the current passage start time difference and the current amount difference.
Becomes a predetermined time Δt or more, or the current difference | i ₁
-I 2 _| when is equal to or greater than a predetermined amount .DELTA.i, determines the difference between the predetermined amount or more amount of rotation of the motor M _L and M _R is occurring. When it is determined that a difference in rotation amount between the motors M _L and M _R is greater than or equal to a predetermined amount, the relay drive circuit 2
The motor stop command signal STOP is output to 9 and 31.

With the above configuration, the motor rotation amount difference detection circuit 45 determines the rotation amount difference between the motors M _L and M _R as the time difference Δt and the current difference Δi.
It can be indirectly known by the relay drive circuit 29, 3 when the difference in rotation amount between the motors M _L and M _R exceeds a predetermined amount.
The motor stop command signal STOP is output to 1. Relay drive circuit 29 to which this signal STOP is input,
31 is a motor M with each contact of relays 33 and 35 turned off.
Both _{L 1} and M _R are stopped and controlled.

Therefore, a difference in rotation amount of a predetermined amount or more does not appear between the two motors M _L and M _R , and the spoiler 1 shown in FIG. 2 is not twisted or given a force that causes destruction.
Further, neither of the motors M _L and M _R will be forced to operate or seized.

In the above embodiment, the difference in the motor rotation amount is calculated as the time difference Δt.
Alternatively, an example in which the current difference Δi is detected is shown. However, predetermined weights Gt and Gi are attached to the time difference Δt and the current difference Δi,
It is also possible to detect by Δt · Gi + Δi · Gt.
Further, it is possible to detect with only one of Δi and Δt, although the accuracy is slightly inferior.

[Effects of the Invention] As described above, according to the present invention, the drive command circuit configured in conjunction with the vehicle speed sensor simultaneously outputs the drive command signals to the drive systems of the two motors, respectively. When the motor is rotated, the motor rotation amount detection circuit detects both the current passage start time difference and the current difference for the currents flowing in the paths between the drive system of the two motors and the ground side. Then, when the current passage start time difference exceeds a predetermined time or when the current amount difference exceeds a predetermined amount, it is determined that the two motors have a rotation difference of a predetermined amount or more. Therefore, the determination that the rotation difference between the two motors is equal to or more than a predetermined amount occurs is controlled by detecting both the current passage start time difference and the difference in the current amount for the current, and thus the control accuracy is significantly improved. Is improved. Further, when the determination is made, the control for stopping both the output of the drive command signal from the drive command circuit to the drive system of the two motors is performed with high accuracy and responsiveness. It is possible to surely stop the rotation at the same time based on the above judgment. Therefore, according to the present invention, even if both ends of the spoiler are driven by two motors, the spoiler does not undergo a large twist or a destructive force, and the both spoilers can be operated without difficulty. Can be provided.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention. FIG. 1 is a perspective view of a vehicle showing a spoiler attached state, FIG. 2 is a perspective view showing details of an attached state of the spoiler to a vehicle body, and FIG.
The figure is a block diagram of an electric circuit. 1 front spoiler M _L left motor M _R right motor 45 motor difference detection circuit STOP motor stop command signal

Claims (1)

[Claims] 1. A spoiler rotatably supported around a fulcrum, two motors for individually rotating both end positions of the spoiler around the fulcrum, and a vehicle speed sensor. When the vehicle speed exceeds a predetermined value or when the vehicle speed falls below a predetermined value, drive command signals are simultaneously output to the drive systems of the two motors in order to drive the spoiler in the forward or reverse directions by the two motors. When the two motors are rotated based on the drive command circuit that outputs the drive command circuit and the drive command signals that are simultaneously output from the drive command circuit, current passing is started for the currents respectively flowing in the drive systems of the two motors. The two motors are detected when both the time difference and the current amount difference are detected, and the current passage start time difference becomes a predetermined time or more, or the current amount difference becomes a predetermined amount or more. A motor rotation amount detection circuit that determines that a rotation difference of a predetermined amount or more is generated, and the drive is performed when the motor rotation amount detection circuit determines that a rotation difference of a predetermined amount or more is generated between the two motors. And a circuit for stopping both output of drive command signals from the command circuit to the drive systems of the two motors.