KR101622086B1 - Active hydraulic booster pedal simulator for vehicle - Google Patents

Abstract

The present invention relates to an active hydraulic booster pedal simulator for vehicles, which comprises: a simulator block consisting of a first bore in which an oil hole for receiving an oil pressure is formed, and a second bore connected to the first bore and having a hollow formed therein; a simulator piston installed in the first bore to slidably move; a first reaction portion consisting of a first filling damper mounted inside the simulator piston and a second filling damper positioned on the second bore; a second reaction portion mounted between the first filling damper and the second filling damper of the first reaction portion, and having a conical shape twisted in an oblique direction; and a support portion in which the second filling damper is received and which is mounted in the second bore. According to the present invention, a filling conical coil spring is mounted, thereby simplifying an overall structure and improving assembility. In addition, due to the above effects, manufacturing processes and costs can be reduced. In addition, due to the above effects, the total weight can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pedal simulator for regenerative braking,

The present invention relates to a regenerative braking brake system pedal simulator for a vehicle, and more particularly, to a pedal simulator for a regenerative braking brake system for a vehicle which can simplify the structure of a pedal simulator and reduce the number of parts by applying a conical coil spring will be.

Generally, a vehicle is equipped with a brake device, and an electronically controlled brake system is used to improve the performance of the brake device.

The electronic control brake system can obtain a strong and stable braking force by supplying or controlling the braking hydraulic pressure generated by the power of the brake pedal to the wheel cylinder through various control systems according to the purpose of use.

Such an electronically controlled brake system includes an anti-lock brake system (ABS) that prevents slippage of the wheel during braking of the vehicle, and a brake traction control system that prevents slippage of the drive wheel in sudden acceleration or sudden acceleration of the vehicle BTCS: Brake Traction Control System).

A Vehicle Dynamic Control System (VDC) or Electronic Stability Control (ESC) that stably maintains the running state of the vehicle by controlling the brake hydraulic pressure by combining an anti-lock brake system and traction control is disclosed.

In addition, there is an electric hydraulic brake system (AHB: Active Hydraulic Booster) to control braking hydraulic pressure, an electrohydraulic brake system (EHB: Electro Hydraulic Brake System), a hydraulic control power unit (HPU: Hydraulic Power Unit), and the like.

Among these, the regenerative braking system (AHB: Active Hydraulic Booster), when the driver depresses the pedal, senses this and activates the hydraulic pressure generating unit to supply the hydraulic pressure to the master cylinder, thereby transmitting the braking hydraulic pressure to the wheel cylinders of the respective wheels Thereby generating a braking force.

Such a regenerative braking system detects the displacement of the brake pedal when the driver depresses the brake pedal.

The electronic control unit operates the hydraulic pressure generating unit and controls the hydraulic fluid stored in the hydraulic oil reservoir to be supplied to the boost chamber of the master cylinder to form a pressure inside the master cylinder.

The pressure inside the master cylinder thus formed pressurizes the master cylinder piston to generate the braking hydraulic pressure. The braking hydraulic pressure is transmitted to the wheel cylinder to generate a braking force.

At this time, when the pressure of the master cylinder is changed during regenerative braking, a force is directly transmitted to the brake pedal, which adversely affects the pedal feeling.

When the feeling of the pedal is dropped, a distinction is made between the feeling of the driver feeling when braking and the degree of squeezing of the brake disk of the brake pad in the actual wheel cylinder.

Here, excessive or inadequate braking is required, requiring frequent replacement of consumable parts such as brake pads, and this can lead to a great disadvantage in vehicle safety accidents such as sudden braking or non-braking.

Accordingly, a regenerative braking brake system is provided with a pedal simulator to provide a reaction force to the brake pedal.

A conventional pedal simulator of a regenerative braking brake system is disclosed in Korean Patent Laid-Open Publication No. 10-2004-0049405 (published on Jun. 12, 2004, hereinafter referred to as "prior art") as a pedal simulator of an active braking device .

1, the master cylinder 1 and the pedal simulator 10 are interlocked, and the pedal simulator 10 is provided with a chamber capable of receiving fluid from the master cylinder 1 therein, (11).

An oil hole 12 through which the opening of the chamber 11 communicates with the master cylinder 1; a piston 13 sliding inside the chamber 11 by hydraulic pressure introduced from the oil hole 12; A primary coil spring 14 for generating a reaction force to transmit a feeling of a pedal to the driver, and a secondary coil spring 15.

The conventional art includes an interlocking member 16 having a spring fixing protrusion 18 for contacting the two coil springs 14 and 15 and interlocking with each other and fixing the coil springs 14 and 15, A plurality of guide members 17 penetrating the guide holes 19 formed in the interlocking member 16 and supporting the sliding of the interlocking member 16 are additionally formed.

As described above, the prior art has a problem in that the coil springs 14 and 15 are fixed and the coil springs 14 and 15 are driven in order to increase the manufacturing cost.

Korean Patent Publication No. 10-2004-0049405

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pedal simulator capable of reducing the overall number of parts and transmitting pedal feelings to a driver with a simple configuration.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a pedal simulator for regenerative braking brake system for a vehicle, comprising: a first bore having an oil hole for receiving hydraulic pressure; and a second bore connected to the first bore and having a hollow therein A first reaction force part composed of a simulator block, a simulator piston installed to slide on the first bore, a first filling damper mounted on the inside of the simulator piston, and a second filling damper positioned on the second bore, A second reaction force part which is mounted between the first reaction force part and formed in a conical shape twisted in an oblique direction, and a support part which receives the second filling damper and is mounted on the second bore.

As described above, the vehicular regenerative braking brake system pedal simulator according to the present invention has the cone-shaped coil spring mounted thereon, thereby simplifying the overall structure and enhancing the assemblability.

Further, because of the above effect, it is possible to obtain an effect of reducing the manufacturing process and cost.

Further, because of the above effect, the effect of reducing the overall weight can be obtained.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a cross-sectional view showing a structure of the prior art.
2 is a schematic diagram of a pedal simulator for regenerative braking brake system for a vehicle according to the present invention.
3 is an exploded perspective view of a regenerative braking brake system pedal simulator for a vehicle according to the present invention.
4 is a schematic sectional view of a pedal simulator for regenerative braking brake system for a vehicle according to the present invention.
5 is a partial enlarged view of a pedal simulator for regenerative braking brake system for a vehicle according to the present invention.
6 is an operational state diagram of a pedal simulator for regenerative braking brake system for a vehicle according to the present invention.
7 is an operational state diagram of a regenerative braking brake system pedal simulator for a vehicle according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 are schematic state diagrams, exploded perspective views and cross-sectional views for explaining a pedal simulator for regenerative braking brake system for a vehicle according to the present invention. The pedal simulator 10 includes a first bore 110, A simulator block 100 composed of a bore 110 and a second bore 120 having a hollow 121 formed therein and a simulator piston 200 slidably installed on the first bore 110 .

A first reaction force part 300 composed of a first filling damper 310 mounted on the inside of the simulator piston 200 and a second filling damper 320 located on the second bore 120, A second bending damper 320 mounted between the first bore 300 and the second bore 120 and having a conical shape twisted in an oblique direction, (600).

The simulator block 100 includes a first bore 110 and a second bore 120. The first bore 110 is formed with an oil hole 111 through which a hydraulic pressure flows from a master cylinder have.

The second bore 120 has a hollow 121 formed therein and has one side connected to the first bore 110 and the other side mounted with a receiving unit 600 to be described later, The bores 110 and 120 are provided with a sealing member 500 for ensuring airtightness.

The simulator piston 200 is installed inside the first bore 110. When the oil pressure flows into the oil hole 111, the simulator piston 200 is slid toward the second bore 120 and has an inner groove 210 formed therein .

The first reaction force part 300 includes a first peeling damper 310 and a second peeling damper 320 which are made of an elastic material and the first peeling damper 310 is formed in the concave groove 210 of the simulator piston 200, As shown in Fig.

The second filling damper 320 is located in the hollow 121 of the second bore 120 and is accommodated in the receiving unit 600.

The second reaction force part 400 is disposed between the first reaction force part 300 and includes a head part 410 mounted on the first filling damper 310 and a body part 410 mounted on the second filling damper 320 420).

Here, the second reaction force part 400 is a conical shape in which the diameter decreases from the body part 420 to the head part 410 and is twisted in an oblique direction.

The second filling damper 320 includes a seat portion 321 on which the body 420 of the second reaction force portion 400 is mounted and a body portion 322 connected to the seat portion 321.

At this time, the seating part 321 of the second filling damper 320, to which the body part 420 of the second reaction force part 400 is mounted, is moved toward the head part 410 of the second reaction force part 400 The diameter of the body portion 420 of the second reaction force portion 400 can be easily restrained.

Therefore, the entire structure of the pedal simulator 10 can be simplified through the mounting structure of the first reaction force part 300 and the second reaction force part 400, and the assembling ability can be improved, The cost can be reduced, and the overall weight can be reduced.

The receiving portion 600 includes a damper receiving portion 610 in which the second filling damper 320 is received and a standing clip 620 for mounting the damper receiving portion 610 in the second bore 120 .

An O-ring 520 is inserted into the O-ring groove 611 to closely contact the inner circumferential surface of the second bore 120. The O-ring groove 611 is formed in the lower outer circumferential surface of the damper accommodating portion 610.

At this time, the O-ring 520 has an effect of preventing an unspecified foreign substance from flowing into the second bore 120.

Hereinafter, when the second filling damper 320 is received in the damper receiving portion 610, a predetermined space is formed.

The space is a volumetric transformation space S that can be easily elastically deformed and volume can be changed when the second filling damper 320 is pressed by the operation of the simulator piston 200.

5 is an enlarged view of a first bore 110 and a simulator piston 200 for explaining a regenerative braking brake system pedal simulator for a vehicle according to the present invention. In the simulator piston 200, The second bore 120 is slid toward the second bore 120, and the concave groove 210 is formed on the inner side.

A first filling damper 310 is inserted and fixed in the concave groove 210. When the simulator piston 200 slides, the first filling damper 310 moves together.

A sealing groove 112 is formed between the first bore 110 and the simulator piston 200 so as to be recessed inside the first bore 110. An L? Type seal 510 is mounted.

The seal 510 has an effect of preventing the oil filled in the simulator block 100 from flowing out to the outside.

6 and 7 are operational state diagrams for explaining a regenerative braking brake system pedal simulator for a vehicle according to the present invention. As shown in FIG. 6, the simulator block 100 includes an oil hole 111 , The simulator piston 200 is slidably moved.

At this time, the first peeling damper 310 is moved together, and the reaction force is generated as the first filling damper 310 and the second reaction force part 400 are compressed and elastically deformed.

As shown in FIG. 7, when the simulator piston 200 continues to slide, the pressing force transmitted to the second reaction force part 400 increases, compressive deformation further proceeds, and the reaction force increases accordingly .

At this time, the seating portion 321 of the second filling damper 320, on which the body portion 420 of the second reaction force portion 400 is seated, is pressed to generate a reaction force. In this state, When the slide is moved, the seat portion 321 and the body portion 322 of the second peeling damper 320 are pressed and a high reaction force is generated.

That is, at the beginning of the stroke of the brake pedal (not shown), a low repulsive force is provided by the repulsive force of the first filling damper 310 of the first reaction force part 300 and the second reaction force part 400, The second reaction force part 400 and the reaction force of the second filling damper 320 of the first reaction force part 300 are added to provide a high reaction force to the brake pedal.

Here, when the second filling damper 320 is elastically deformed by the pressure, the second damping member (second damping member) 320 is deformed by the predetermined volume deformation space S formed between the damper accommodating portion 610 and the second damping member 320 320 are easily elastically deformed, and the volume of the second peeling damper 320 can be changed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And should be construed as being included in the scope of the present invention.

1: Master cylinder 10: Pedal simulator
11: chamber 12: oil ball
13: piston 14: primary coil spring
15: secondary coil spring 16: interlocking member
17: guide member 18: spring fixing projection
19: guide hole S: volume deformation space
10: pedal simulator 100: simulator block
110: first bore 120: second bore
111: Oil ball 112: Sealing groove
120: second bore 121: hollow
200: Simulator piston 210: Needle groove
300: first reaction force unit 310: first peeling damper
320: second peeling damper 321:
322: body part 400: second reaction force part
410: head part 420:
500: sealing member 510: seal
520: O-ring 600:
610: Damper housing part 611: O-ring groove
620: Stand clip

Claims (10)

A simulator block 100 comprising a first bore 110 formed with an oil hole 111 for receiving hydraulic pressure and a second bore 120 connected to the first bore 110 and having a hollow 121 formed therein, );
A simulator piston (200) installed to slide on the first bore (110);
A first reaction force part 300 composed of a first filling damper 310 mounted inside the simulator piston 200 and a second filling damper 320 located in the second bore 120;
A second reaction force part 400 mounted between the first reaction force parts 300 and configured in a conical shape to be twisted in an oblique direction; And
And a pedestal part (600) in which the second filling damper (320) is received and mounted on the second bore (120)
The second reaction force part 400 includes a head part 410 fixed to the first peeling damper 310 and a head part 410 integrally formed with the head part 410 and seated on the second peeling damper 320 And a body portion 420 having a shape gradually enlarged in diameter from the head portion 410,
The second filling damper 320 is received in the body 420 of the second reaction force part 400 and is formed to have a smaller diameter toward the head part 410 of the second reaction force part 400 And a body portion (322) integrally formed with the seat portion (321). The pedal simulator according to claim 1, wherein the body portion (322) is formed integrally with the seat portion (321).
The method according to claim 1,
The simulator piston (200)
Wherein a recess (210) in which the first filling damper (310) is inserted and fixed is formed in the pedal simulator.
delete delete delete The method according to claim 1,
The receiving unit 600 includes:
A damper accommodating portion 610 in which the second filling damper 320 is accommodated and a stopper 620 for mounting the damper accommodating portion 610 in the second bore 120. [ Regenerative braking brake pedal simulator.
The method according to claim 6,
The damper receiving portion 610
And a volume deformation space (S) is formed so that the volume of the second filling damper (320) can be changed when the second pressing damper (320) is elastically deformed.
The method according to claim 6,
The O-ring 520 is inserted into the O-ring groove 611 and is closely attached to the inner circumferential surface of the second bore 120. The O-ring groove 611 is formed on the lower outer circumferential surface of the damper accommodating portion 610, Brake pedal simulator for vehicle.
The method according to claim 1,
Wherein the shape of the seat portion (321) is reduced in diameter toward the head portion (410) in correspondence with the shape of the body portion (420).
The method according to claim 1,
A sealing groove 112 is formed between the first bore 110 and the simulator piston 200 so as to be embedded in the first bore 110. An L-type seal 510 ) Is mounted on the vehicle body.

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