JP3043134B2 - Anti-lock braking system for motorcycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front wheel modulator for performing anti-lock braking of a front wheel and a rear wheel modulator for performing anti-lock braking of a rear wheel, which are disposed close to the front wheel and the rear wheel, respectively. The present invention relates to an anti-lock braking device for a motorcycle.

[0002]

2. Description of the Related Art In an automobile or a motorcycle, the vehicle body travels in a state where the rotation of wheels is stopped during braking.
In order to prevent a so-called brake lock state, an anti-lock braking device has been conventionally used.

[0003] For example, as an anti-lock braking device incorporated in a motorcycle, one disclosed in Japanese Utility Model Laid-Open No. 2-10169 is known. As shown in FIG. 4, the antilock braking device according to the related art is mounted on a motorcycle 1, and calipers (braking) are provided on disk plates 3a and 3b fixed to a front wheel 2a and a rear wheel 2b. Parts) 4a and 4b are provided. Each caliper 4a,
One end of each of the pipes 5a and 5b communicates with 4b,
The other ends of the pipes 5a and 5b communicate with a hydraulic unit (modulator) 6. The hydraulic unit 6 has a pipe 5c,
5d, master cylinders 7a and 7b communicate with each other. A handle lever 9a is connected to the master cylinder 7a via a cable 8, while the master cylinder 7b is connected to the master cylinder 7b.
Is connected to the brake pedal 9b.

[0004]

In the prior art, since the hydraulic unit 6 is disposed at the center of the motorcycle 1, the pipe 5a connecting the hydraulic unit 6 and the caliper 4a is particularly suitable. It will be long. Therefore, it takes time from the start of the antilock braking to the transmission of the hydraulic pressure to the caliper 4a after the hydraulic unit 6 is driven, the response is reduced, and the stroke of the handle lever 9a is increased due to the internal expansion of the pipe 5a. This causes a problem of causing a decrease in brake operability. In addition, the pipe 5a has an upwardly curved portion between the hydraulic unit 6 and the caliper 4a due to the mounting position of the hydraulic unit 6. For this reason, when bleeding air from inside the brake pipe at the time of assembly or maintenance, air tends to remain particularly at the upper curved portion of the pipe 5a, and the work of removing this air is complicated.

SUMMARY OF THE INVENTION The present invention solves this kind of problem, and it is possible to efficiently perform anti-lock braking, effectively maintain brake operability, and further improve the assembling workability. It is an object to provide a lock braking device.

[0006]

In order to achieve the above object, the present invention provides a front wheel master cylinder connected to a front wheel brake operating section and a front wheel master cylinder under the action of the front wheel brake operating section. A front wheel braking unit that applies a braking force to the front wheels in accordance with the generated hydraulic pressure, a front wheel modulator that adjusts the hydraulic pressure generated in the front wheel master cylinder to reduce the braking force, and a rear wheel brake operating unit. A rear-wheel master cylinder to be connected; a rear-wheel braking unit that applies a braking force to a rear wheel in response to a hydraulic pressure generated in the rear-wheel master cylinder under the action of the rear-wheel brake operating unit; A rear wheel modulator for adjusting the hydraulic pressure generated in the wheel master cylinder to reduce the braking force, wherein the front wheel modulator is provided between a front wheel brake operating unit and a front wheel .
The rear wheel modulator is disposed along an upper inner side surface of the vehicle body side cowling, and the rear wheel modulator is disposed between a rear wheel brake operation unit and a rear wheel.

[0007]

In the anti-lock braking device for a motorcycle according to the present invention, a front wheel modulator for adjusting the hydraulic pressure generated in the front wheel master cylinder to reduce the braking force of the front wheel is provided between the front wheel brake operating section and the front wheel. The rear wheel modulator, which is arranged and adjusts the hydraulic pressure generated in the rear wheel master cylinder to reduce the braking force of the rear wheel, is provided between the rear wheel brake operation unit and the rear wheel and on the vehicle body side cowling. Upper inside surface of
It is arranged along . As a result, the brake piping from the front wheel brake operating section to the front wheel brake operating section via the front wheel modulator can be made as short as possible, and the responsiveness of anti-lock braking is improved, and the brake operability and operation are improved. The snake feeling can be maintained effectively .

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an antilock braking system for a motorcycle according to the present invention.

In FIG. 1 and FIG. 2, reference numeral 10 denotes a motorcycle.
And a handle portion 14, a step portion 15, a front wheel portion 16, and a rear wheel portion 18.

The motorcycle 10 is provided with an anti-lock braking device 20 according to the present embodiment. As shown in FIGS. 1 to 3, the anti-lock braking device 20 includes a front wheel master cylinder 24 connected to a brake lever (a front wheel brake operating unit) 22, and the front wheel master cylinder 24 under the action of the brake lever 22. The front wheel caliper cylinder (front wheel braking unit) 26 for applying a braking force to the front wheel portion 16 in accordance with the hydraulic pressure generated in the cylinder 24 and the hydraulic pressure generated in the front wheel master cylinder 24 are adjusted to reduce the braking force. The front wheel modulator 28 to be depressurized, the rear wheel master cylinder 32 connected to the brake pedal (rear wheel brake operation unit) 30, and the hydraulic pressure generated in the rear wheel master cylinder 32 under the action of the brake pedal 30 Corresponding rear wheel part 18
A rear wheel caliper cylinder (rear wheel braking unit) 34 for applying a braking force to the rear wheel, and a rear wheel modulator 36 for adjusting the hydraulic pressure generated in the rear wheel master cylinder 32 to reduce the braking force. .

The front wheel modulator 28 is provided between the brake lever 22 and the front wheel portion 16 and above the body side cowling.
The front wheel master cylinder 24
The front wheel modulator 28 and the front wheel caliper cylinder 26 communicate with each other through a pipe 40 while the front wheel caliper cylinder 26 and the front wheel modulator 28 communicate with each other through a pipe 40. On the other hand, the rear wheel modulator 36 is disposed between the brake pedal 30 and the rear wheel portion 18, and the rear wheel master cylinder 32 and the rear wheel modulator 36 communicate with each other through the conduit 42. Rear wheel caliper cylinder 34
The rear wheel modulator 36 communicates with the rear wheel modulator 36 via a conduit 44.

As shown in FIG. 3, the front wheel modulator 2
8 is provided with a casing 46, and the casing 46 has an input port 4 communicating with the front wheel master cylinder 24.
8 and an output port 50 communicating with the front wheel caliper cylinder 26 are formed. The input port 48 and the output port 50 communicate with an input hydraulic chamber 52 and an output hydraulic chamber 54, respectively.
Is maintained in a closed state via a cut valve 58 that engages with the pressing spring 56. The end of the cut valve 58 protrudes into the output hydraulic chamber 54, and can freely contact an expander piston 60 that is provided in the output hydraulic chamber 54 so as to be able to advance and retreat.

An accumulator 64 is provided integrally with the casing 46 via a wall portion 62. An accumulator chamber 68 is formed at one end of a piston 66 constituting the accumulator 64. The extending rod 70 penetrates the wall 62 and enters the back chamber 72 of the expander piston 60. Piston 6
A spring 74 for pressing the piston 66 toward the back chamber 72 is disposed at the other end of the spring 6.

An inlet valve 78 and an outlet valve 80 communicate with the back chamber 72 via a pipe 76, and a pump P is connected to the accumulator chamber 68 via a pipe 82.
The pump P supplies oil from the tank T under the action of the motor M. The motor M, the inlet valve 78 and the outlet valve 80
The controller 84 is connected to a control unit 86. This control unit 8
A wheel speed sensor 90 for detecting a wheel speed is connected to 6 via a disk plate 88 of the front wheel portion 16.

On the other hand, the rear wheel modulator 36 is configured similarly to the front wheel modulator 28 described above, and a detailed description thereof will be omitted. Note that a configuration may be adopted in which control is performed by a single controller 84 without using the control unit 86.

Next, the operation of the antilock braking device 20 thus configured will be described.

At the time of normal braking, as shown in FIG. 3, the inlet valve 78 is opened and the outlet valve 80 is closed, and the oil projected from the pump P is supplied from the inlet valve 78 to the line 76. Is supplied to the back room 72 via the For this reason, the expander piston 60 moves toward the output hydraulic chamber 54 (in the direction of arrow A) to open the cut valve 58. This allows input port 4
8 and the output port 50 communicate with each other, and the front wheel master cylinder 24 is urged by gripping the brake lever 22. The brake oil pressure generated by the front wheel master cylinder 24 is transmitted to the front wheel caliper cylinder 26 through the conduit 38, the input port 48, the output port 50, and the conduit 40, and a braking force is applied to the disk plate 88. . When the brake pedal 30 is depressed, a braking force is similarly applied to the disc plate 88 of the rear wheel portion 18.

Here, the pump P is moved from the accumulator chamber 6
8 is supplied with pressurized oil, the piston 66 retreats against the pressing force of the spring 74, and the accumulator chamber 6
8 is stored.

Next, for example, when the front wheel section 16 is about to enter the locked state, a signal is supplied from the wheel speed sensor 90 to the control unit 86, whereby the control unit 86 drives the controller 84 to perform anti-lock braking. A signal is provided. For this reason, the inlet valve 78 is closed, the outlet valve 80 is opened, the back chamber 72 communicates with the tank T, and the cut valve 58 controls the elasticity of the pressing spring 56 and the pressure in the input hydraulic chamber 52. It retracts integrally with the expander piston 60 via hydraulic pressure. Therefore, the cut valve 5
8, the input port 48 and the output port 50 are shut off, and the volume of the output hydraulic chamber 54 increases due to the movement of the expander piston 60, and the brake hydraulic pressure supplied to the front wheel caliper cylinder 26 decreases. As a result, antilock braking is performed.

Although the anti-lock braking of the front wheel section 16 has been described above, the anti-lock braking of the rear wheel section 18 is similarly performed.

In this case, in this embodiment, the front wheel modulator 28 is disposed between the brake lever 22 and the front wheel portion 16, while the rear wheel modulator 36 is connected to the brake pedal 30 and the rear wheel portion 18. It is arranged between. For this reason, the pipeline 38 connecting the front wheel master cylinder 24 and the front wheel modulator 28 and the front wheel caliper cylinder 2
6 and the conduit 40 connecting the front wheel modulator 28,
As short as possible, the time from when the anti-lock braking is started and the front wheel modulator 28 is driven to when the brake hydraulic pressure is transmitted to the front wheel caliper cylinder 26 is reduced at once, and the responsiveness of the anti-lock braking is reduced. The effect of improving is obtained. In addition, the influence of the internal expansion of the conduits 38 and 40 is effectively reduced, and the brake operability is not reduced. Furthermore, since the front pipe modulator does not have an upward curved portion due to the structure in which the front wheel modulator is attached to the center of the vehicle body as in the past, the work of bleeding air from inside the brake pipe during assembly and maintenance is required. It is possible to carry out easily and efficiently, and the workability of this air removal work is improved.

A pipe 42 connecting the rear wheel master cylinder 32 and the rear wheel modulator 36 and a pipe 44 connecting the rear wheel caliper cylinder 34 and the rear wheel modulator 36 are formed as much as possible. The front wheel portion 16 is shortened.
The same effect can be obtained.

[0023]

As described above, in the antilock braking system for a motorcycle according to the present invention, the front wheel modulator for adjusting the hydraulic pressure generated in the front wheel master cylinder to reduce the braking force on the front wheel is operated by the front wheel brake operation. The rear wheel modulator is disposed between the front wheel and the rear wheel, and adjusts the hydraulic pressure generated in the rear wheel master cylinder to reduce the braking force of the rear wheel. It is arranged between.
For this reason, the brake pipe from the front wheel brake operation unit to the front wheel brake operation unit via the front wheel modulator can be made as short as possible, and the delay in hydraulic pressure response can be prevented to prevent the antilock braking response. While improving the
Brake operability can be effectively maintained. Similar effects can be obtained for the rear wheels.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a motorcycle equipped with a motorcycle anti-lock braking device according to the present invention.

FIG. 2 is an explanatory plan view of the motorcycle.

FIG. 3 is a schematic configuration diagram of the antilock braking device.

FIG. 4 is an explanatory side view of a motorcycle equipped with a conventional antilock braking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Motorcycle 16 ... Front wheel part 18 ... Rear wheel part 20 ... Antilock braking device 22 ... Brake lever 24 ... Master cylinder for front wheels 26 ... Caliper cylinder for front wheels 28 ... Modulator for front wheels 30 ... Brake pedal 32 ... Master for rear wheels Cylinder 34: Rear wheel caliper cylinder 36: Rear wheel modulator 38, 40, 42, 44 ... Pipe line

Continuation of the front page (56) References JP-A-3-121196 (JP, A) JP-A-3-121964 (JP, A) JP-A 1-212653 (JP, A) JP-A 4-368267 (JP (A) JP-A-2-306860 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62L 3/00-3/02 B60T 8/34-8/58

Claims (1)

(57) [Claims] 1. A front wheel master cylinder connected to a front wheel brake operation unit, and a front wheel brake for applying a braking force to the front wheels in response to a hydraulic pressure generated in the front wheel master cylinder under the action of the front wheel brake operation unit. A front wheel modulator that adjusts a hydraulic pressure generated in the front wheel master cylinder to reduce the braking force; a rear wheel master cylinder connected to a rear wheel brake operation unit; and the rear wheel brake operation unit. A rear wheel braking unit that applies a braking force to the rear wheels in accordance with the hydraulic pressure generated in the rear wheel master cylinder under the action of: the braking force by adjusting the hydraulic pressure generated in the rear wheel master cylinder A rear wheel modulator for reducing the pressure of the rear wheel, wherein the front wheel modulator is disposed between a front wheel brake operation unit and a front wheel and along an upper inner surface of a vehicle body side cowling; The anti-lock braking device for a motorcycle, wherein the lator is disposed between the rear wheel brake operation unit and the rear wheel.