JPH08276870A - Drive control device for movable spoiler - Google Patents

Abstract

PURPOSE: To appropriately control a drive means in accordance with a term by providing a means for limiting the drive of the drive means, irrespective of an actual position of a spoiler if an instruction to one of two positions is continuously delivered from a control means. CONSTITUTION: A monitoring part monitors whether an introduction for a stop position delivered from a drive control part 36 is changed from a retracting position to an extending position or vice versa. A determining part determines whether a signal delivered from the drive control part 35 coincides with a stop position under an instruction from the drive control pat 36, or not. When it does not coincide, a switching transistor 52 is energized to drive a motor 12 so as to shift the position of a spoiler panel. If it coincides, the motor 12 is not driven even though an instruction for driving the drive means in association with a positional change is delivered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a movable spoiler, and more particularly to a drive control device for a movable spoiler that controls the drive of a drive means to move the spoiler to a retracted position and a deployed position.

[0002]

2. Description of the Related Art Conventionally, there is a vehicle, for example, an automobile, in which a spoiler (front spoiler) is attached, for example, below a head portion. The front spoiler gives downforce to the vehicle and prevents side slippage of the vehicle body at high speed,
It improves the driving stability of the car. However, the spoiler can improve the driving stability of the vehicle at high speeds, but on the other hand, at the time of low speeds such as when driving on a bad road or when parking, the spoiler is damaged due to interference with the road surface and curbs. The situation is easy to do.

Therefore, depending on the conditions such as the switch and the vehicle speed, the spoiler can be set (deployed) to a position where it exerts an effect, and a movable spoiler that can be set (retracted) to a position where it does not interfere with the road surface or curb can be attached. It is preferably already known (for example, JP-A-2-
95987 and JP-A-3-90485). For such a movable spoiler, the spoiler body (spoiler panel)
A motor that drives in one direction to move the motor to the deployed position and the retracted position is provided, and this motor has a crank arm fixed to an output shaft that is decelerated by a worm, and is a so-called link that is swingably connected to the crank arm. It is connected to the spoiler by a mechanism.

[0004]

However, since such a motor is of a one-way rotation type, an external force is applied to the spoiler panel when overrun occurs, wind pressure, or repair by the user, and the spoiler panel is stored or expanded, for example. If the position is other than the position, the position cannot be corrected by reverse rotation. Therefore, the position is corrected by further rotating about one turn in the forward direction. If, for some reason, the spoiler panel always stops at a position that slightly overruns the deployed position, the spoiler panel will repeatedly store and deploy, and it will not be able to fully demonstrate its original function.

Further, the movement starts against the operator's will, which is not preferable. The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a drive control device for a movable spoiler that can appropriately control the drive means based on conditions.

[0006]

According to a first aspect of the present invention, there is provided a drive control device for a movable spoiler, which comprises: a drive means for selectively moving the spoiler to two positions, a retracted position or a deployed position; and a predetermined condition including at least a vehicle speed. A drive control means for controlling the drive of the drive means;
When the instruction to at least one of the positions continues, the drive limiting means limits the drive of the drive means regardless of the actual position of the spoiler.

[0007]

According to the first aspect of the present invention, the drive limiting means prevents the drive means from being driven when one stop position instruction continues, unless the stop position instruction is changed. Restrict. With this, when there is no change in the instruction of the stop position, even if the position of the spoiler moves due to an external force, for example, the drive unit does not drive, and the drive unit can be appropriately controlled.

Therefore, when the stop position is not instructed based on the condition, that is, when the spoiler moves due to an external force or the like, the drive of the drive means is restricted so as to eliminate the unnecessary drive of the drive means. There is.

[0009]

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

FIG. 1 shows a schematic perspective view of a front spoiler (hereinafter, simply referred to as “spoiler”) 10 of a vehicle according to this embodiment, and FIG. 2 (A) shows a rear surface of the spoiler 10. 2 (B), the connecting portion of the link mechanism is shown enlarged.

On the upper side of one end of the spoiler 10 in the width direction, a motor 12 as driving means is arranged. A gear box 14 is arranged at the lower end of the motor 12, that is, on the side where the output shaft is projected, and is connected to the output shaft.
The gear box 14 accommodates a worm speed reduction mechanism that decelerates the rotation of the motor 12 with a worm and a worm wheel and outputs the worm speed reduction mechanism. The gearbox 14 is attached to a bracket 16 having a substantially U shape. A shaft through hole is provided in a pair of side plates 16A (only one is shown in FIG. 1) of the bracket 16, and a drive transmission shaft 26, which is an output shaft of the gearbox 14, penetrates through the shaft through hole.

A tongue piece 16B is integrally formed below the side plate 16A, and a shaft 18 is spanned by a bearing 17. The shaft 18 is pivotally supported by the cylindrical portion 19A of the vehicle mounting bracket 19. The flange portion 19B of the vehicle mounting bracket 19 is fixed to a predetermined position of the vehicle, whereby the shaft 18 is supported by the vehicle via the vehicle mounting bracket 19. Shaft 1
Both ends of 8 are pivotally supported by panel brackets 22 provided on the back surface of the spoiler panel 20, respectively. That is, the shaft 18 serves as a central axis of rotation of the spoiler panel 20.

A crank arm 30 is provided at the tip of the drive transmission shaft 26 that penetrates the side plate 16A of the bracket 16.
Has been fixed. This allows the crank arm 30
When the drive transmission shaft 26 rotates about the axis of the drive transmission shaft 26, the rotation of the drive transmission shaft 26 follows.

The other end of the crank arm 30 is shown in FIG.
As shown in (B), a ball shaft 28 projecting to the opposite side to the bracket 16 side is provided in parallel with the projecting direction of the drive transmission shaft 26, and the ball shaft 28 has ball bearings 29 at both ends. Is rotatably supported on one side of a link arm 32 having a crank arm 3
0 and the link arm 32 are connected.

On the other hand, the ball bearing 29 at the other end of the link arm 32 has one end fixed to a part of the panel bracket 22 and the ball shaft 28 of the interlocking shaft 34 having the ball shaft 28 fitted at the other end. There is. As described above, the link arm 32 has one end connected to the crank arm 30 and the other end connected to the panel bracket 22 via the interlocking shaft 34. Therefore, the panel bracket 22 moves in conjunction with the movement of the link arm 32. It is supposed to do.

Now, referring to FIG. 3, when the motor 12 rotates in the clockwise direction shown by the arrow Q in FIG. 3, the spoiler panel 20 is moved by the link mechanism of the crank arm 30 and the link arm 32. 3 swings in the direction of the arrow S in FIG. 3 within a range of a predetermined angle (approximately 90 °) via the panel bracket 22.

Further, as shown in FIG. 4, the drive controller 3
A motor 12, a spoiler switch 38, and a vehicle speed pulse detector 40 are connected to 6. Spoiler switch 3
8 is a switch for permitting driving of the spoiler 10,
It is attached to the instrument panel of the driver's seat. Further, the vehicle speed pulse detector 40 outputs a pulse according to the vehicle speed, and the drive control unit 36 calculates the vehicle speed according to the pulse signal. In the present embodiment, when the vehicle speed is 70 km / h or more while the spoiler switch 38 is in the ON (driving enabled) state, the spoiler panel 20 is
Is deployed, and the spoiler panel 20 is stored when the speed is 50 km / h or less.

Between the drive controller 36 and the motor 12,
The relay switch 50 is connected, and the relay switch 50 energizes or deenergizes the coil portion 50A of the relay switch to switch the contact of the switch portion 50B to control the driving or stopping of the motor 12. Further, a switching transistor 52 is connected between the relay switch 50 and the drive control unit 36, and the relay switch 50 is switched according to a control signal from the drive control unit 36. That is, when the control signal is supplied to the base of the switching transistor 52, the collector-emitter is turned on and the coil portion 50A can be energized. The energization depends on the ON / OFF states of the cam 1 and the cam 2 described later.

The deployed position and the retracted position of the spoiler panel 20 are determined according to the signal from the cam switch 24.

The cam switch 24 is the gear box 1
4 has a cam plate 44 fixed to the side surface of the worm wheel and a plurality of fixed contacts which slide on the cam plate 44 to detect each position. Further, the cam plate 44 is adapted to rotate integrally with the drive transmission shaft 26 (in the direction of the arrow in FIG. 5).

The cam plate 44 is composed of three conductive lanes that are electrically connected to each other, as shown in FIG. The two conductive lanes on the outer side and the center side of the conductive lane are not electrically connected to a position indicating that the spoiler panel 20 is in the retracted position and a position indicating that the spoiler panel 20 is in the deployed position. The portions 46 and 48 are provided with a predetermined angle in a positional relationship of 180 ° about the drive transmission shaft 26. In each lane, a common contact G, a storage contact A, and a deployment contact B are sequentially held in contact with each other from the inside. The common contact G is grounded, and the power supply voltage V is supplied to the storage contact A and the development contact B via a resistor R. Therefore, when the storage contact A and the common contact G or the expansion contact B and the common contact G are in the conductive state by the lane, no current flows to the drive control unit 36 and the L signal is supplied. Become. Here, if the non-conducting portion 46 or the non-conducting portion 48 corresponds to the storage contact A or the development contact B, the drive control unit 3
A current flows through 6 and an H signal is supplied. The drive control unit 36 can recognize the deployed position or the stored position by being supplied with the H signal. Hereinafter, the signal for detecting the storage position will be referred to as cam 1, and the signal for detecting the deployed position will be referred to as cam 2. The cams 1 and 2 indicate the position of the spoiler panel 20 and serve as stop signals for driving the motor 12.

The drive control unit 36 of this embodiment stores a program having functions as a monitoring unit and a determination unit.

The monitoring unit monitors whether the stop position instruction from the drive control unit 36 has changed from the storage position to the deployed position or from the deployed position to the stored position. Only when the instruction is changed, the determination of the drive of the motor for moving to the changed stop position is executed by the determination unit. In other words, if the instruction is not changed, the motor 12 is not driven at all.

The determination unit determines whether or not the signal (cam 1 or cam 2) from the cam plate 24 input to the drive control unit 36 matches the stop position based on the instruction from the drive control unit 36. If it is determined that they do not match, the switching transistor 52 is turned on, the motor 12 is driven to move the position of the spoiler panel 20, and if they match, the drive means associated with the change of the stop position. The motor 12 is not driven even if the instruction to drive is issued.

The operation of this embodiment will be described below with reference to the flowchart of FIG. In step 100, the cam signal is acquired, and in step 102, the signal from the spoiler switch 38 and the vehicle speed pulse detector 40 are acquired.
The vehicle speed pulse by each is taken in.

When the loading is completed, in step 104, the stop position of the spoiler panel 20 is determined based on each information loaded by the drive control unit 36.
That is, the proper position of the spoiler panel 20 based on the vehicle speed is determined and determined to be the storage position or the deployed position, and the movement to the determined stop position is instructed. For example, during acceleration, the instruction is changed from the retracted position to the deployed position by exceeding 70 km / h, and during deceleration, the instruction is changed from the deployed position to the retracted position by falling below 50 km / h.

When the stop position of the spoiler panel 20 is determined, it is determined in step 106 whether the instruction of the determined stop position has been changed. If the stop position instruction has been changed, the determination is affirmative and Step 1
08, and it is determined whether or not the captured cam signal and the instructed stop position of the spoiler panel 20 match.

If the cam signal and the instructed stop position match, the determination is affirmative, the drive of the motor 12 is limited in step 110, and the stop state is continued. On the other hand, when the cam signal and the instructed position do not match, the determination is negative, and in step 112, a series of drive control for the motor 12 is performed. That is, the motor 12 is instructed to be driven because it moves to the stop position based on the instruction from the drive controller 36. When driving is instructed, the motor 12 starts driving. When the driving of the motor 12 is started, the cam plate 44 is rotated accordingly, until the predetermined H signal is input from the cam 1 or the cam 2 to the drive control unit 36.
Continues driving, and stops when the H signal is input to the cam 1 or the cam 2. During this time, the spoiler panel 20
Moves between the deployed position and the stored position.

The relationship between the cam signals input from the cams 1 and 2 and the position of the spoiler panel 20 is shown in Table 1 below.

[0030]

[Table 1] By the way, the spoiler panel 20 may move to a position different from the instruction due to external forces such as repair, wind pressure, and obstacles. In these cases, conventionally, the position was returned to the designated position (one-way rotation). However, in the present embodiment, when the instruction of the stop position is not changed in step 106, the determination is negative and the processing is ended without passing through the motor drive control routine.

That is, even if the cam signal input to the drive control unit 36 is changed (even if the spoiler panel 20 is moved), the stop position instruction of the spoiler panel 20 is not changed based on the vehicle speed or the like. The motor 12 never drives.

Therefore, even if the position of the spoiler panel 20 moves while the spoiler switch 38 is turned on due to repairs or obstacles, and the cam signal input to the drive control unit 36 is changed, it is based on the vehicle speed or the like. If the instruction of the stop position of the spoiler panel 20 is not changed, the drive stopped state of the motor 12 can be maintained, so that the spoiler panel 20 does not move against the driver's intention.

In addition, even if an overrun always occurs due to a mechanical abnormality, in the present embodiment, since it is stopped at the position as it is, repeated swinging can be prevented.

In this embodiment, the vehicle speed pulse detector 40
The threshold value of the pulse detected by
Although the vehicle speed is set to km / h and 50 km / h when stored, other suitable vehicle speed may be used depending on the vehicle type.

[0035]

As described above, according to the present invention, it is possible to provide a drive control device for a movable spoiler capable of appropriately controlling the drive means based on conditions.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a spoiler according to an embodiment of the present invention.

FIG. 2A is a rear view of the spoiler according to the embodiment of the present invention, and FIG. 2B is an exploded enlarged view of a connecting portion of a spoiler link mechanism.

FIG. 3 is a side view of the spoiler showing a driving state of the spoiler according to the embodiment of the present invention.

FIG. 4 is a configuration diagram of a drive control device for a spoiler according to an embodiment of the present invention.

FIG. 5 is a schematic view of a cam plate according to an embodiment of the present invention.

FIG. 6 is a flowchart showing a drive control method for the spoiler according to the embodiment of the present invention.

[Explanation of symbols]

 10 Spoiler 12 Motor 20 Spoiler Panel 30 Crank Arm 32 Link Arm 36 Drive Control Section 38 Spoiler Switch 40 Vehicle Speed Pulse Detector 42 Warning Lamp 44 Cam Plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akira Kato 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd. (72) Inventor Yoshito Hayashi 1-1-chome, Showa town, Kariya city, Aichi Nidec Within the corporation

Claims (1)

[Claims] 1. A drive means for selectively moving the spoiler to two positions, a storage position or a deployed position, drive control means for controlling the drive of the drive means under predetermined conditions including at least the vehicle speed, and the control means. When the instruction from at least one of the two positions is continued, the drive control device for the movable spoiler, including drive limiting means for limiting the drive of the driving means regardless of the actual position of the spoiler. .