KR20240088070A - Two-stage brake system capable of emergency braking in case of emergency - Google Patents

Abstract

The two-stage brake system capable of emergency braking according to the present invention electrically determines the driver's intention to brake from a pedal displacement sensor that detects the displacement of the brake pedal when the driver presses the brake pedal with a leg force within a certain range. An electronic brake system equipped with a hydraulic pressure supply device that receives a signal and supplies the hydraulic pressure necessary for braking to the wheel cylinder; And when the electric signal does not operate in the electronic brake system, when the driver steps on the brake pedal with a pedal force exceeding the predetermined range, the hydraulic pressure is switched by a predetermined conversion module arranged to contact the brake pedal and connected to the conversion module. A hydraulic brake system that supplies hydraulic pressure necessary for braking to the wheel cylinder using a flow path and a vacuum booster.

Description

{Two-stage brake system capable of emergency braking in case of emergency}

The present invention relates to a two-stage structural braking system capable of emergency braking in an emergency. In particular, when the electric signal in the electronic braking system does not operate, it can be converted to a physical braking system by hydraulic pressure. It is about a two-stage structural braking system.

In general, vehicles are essentially equipped with a brake system for braking, and recently, various types of systems have been proposed to obtain stronger and more stable braking force.

For example, the brake system includes the Anti-Lock Brake System (ABS), which prevents wheel slippage during braking, and the Brake Traction Control System (BTCS), which prevents slippage of the driving wheels when the vehicle suddenly starts or accelerates. Control System), and the Electronic Stability Control System (ESC), which maintains the vehicle's driving condition stably by controlling brake fluid pressure by combining an anti-lock brake system and traction control.

The conventional brake system used a mechanically connected vacuum booster to supply the hydraulic pressure needed for braking to the wheel cylinder when the driver stepped on the brake pedal, but recently, when the driver stepped on the brake pedal, it used a pedal displacement sensor that detects the displacement of the brake pedal. Electronic braking systems equipped with a hydraulic pressure supply device that receives the driver's intention to brake as an electrical signal and supplies the hydraulic pressure necessary for braking to the wheel cylinder are widely used.

However, such a conventional electronic brake system has the risk of the brake not operating if the electrical signal does not operate.

In this case, emergency braking is performed by activating the emergency switch. In this case, the number of expected uses in emergency situations is expected to be low because the emergency switch must be operated by releasing the handle from the steering wheel in an emergency situation.

In addition, there is a problem in that during emergency braking, a confused user only applies the brakes hard and is unable to use the emergency switch.

KR 10-2431715 B1

The purpose of the present invention is to provide a two-stage brake system capable of emergency braking in an emergency, which can be converted to a physical brake system by hydraulic pressure when the electric signal in the electronic brake system does not operate.

In order to achieve the above object, the two-stage brake system capable of emergency braking in an emergency according to the present invention is a pedal displacement sensor that detects the displacement of the brake pedal when the driver steps on the brake pedal with a pedal force within a certain range. An electronic brake system equipped with a hydraulic pressure supply device that receives the driver's intention to brake as an electrical signal and supplies the hydraulic pressure necessary for braking to the wheel cylinder; And when the electric signal does not operate in the electronic brake system, when the driver steps on the brake pedal with a pedal force exceeding the predetermined range, the hydraulic pressure is switched by a predetermined conversion module arranged to contact the brake pedal and connected to the conversion module. A hydraulic brake system that supplies hydraulic pressure necessary for braking to the wheel cylinder using a flow path and a vacuum booster.

The conversion module includes a hollow case located below the brake pedal and coupled to one end of the brake pedal; a rotating member having a predetermined length, one end of which is coupled to rotate at a preset rotation angle within the case; and a changeover switch installed inside the case and turned on by being pressed by the other end of the rotating member when the rotating member rotates.

A fitting hole penetrating upward and downward is formed on the upper surface of the case, and the rotating member is fitted into the fitting hole so that the other end of the rotating member is exposed to the outside of the upper surface of the case.

A pressure protrusion of a predetermined length is formed to protrude from the bottom of the other end of the brake pedal, and when the brake pedal is pressed with a pedal force exceeding the predetermined range, the other end of the rotating member exposed to the outside of the upper surface of the case is pressed by the pressure protrusion. It is accommodated inside the case and rotates at a preset rotation angle.

At this time, the rotating member is preferably made of an elastic material that can be contracted and restored in the longitudinal direction.

When the changeover switch is turned on in this way, hydraulic pressure is supplied to the wheel cylinder using the hydraulic passage and vacuum booster.

Details of other embodiments are included in “Specific Details for Carrying Out the Invention” and the accompanying “Drawings.”

The advantages and/or features of the present invention and methods for achieving them will become clear by referring to the various embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the configuration of each embodiment disclosed below, but may also be implemented in various different forms, and each embodiment disclosed in this specification only serves to ensure that the disclosure of the present invention is complete. It is provided to fully inform those skilled in the art of the present invention of the scope of the present invention, and it should be noted that the present invention is only defined by the scope of each claim in the claims.

According to the solution to the above-described problem, the present invention has the following effects.

The present invention has a two-stage structure so that when the electric signal in the electronic brake system does not operate, it can be converted to a physical hydraulic brake system, which has the effect of quickly responding to dangerous emergency situations without taking your hands off the steering wheel.

Figure 1 is a diagram showing a two-stage structural braking system capable of emergency braking in an emergency according to the present invention.
Figure 2 is a diagram schematically showing a side view of a two-stage braking system capable of emergency braking according to the present invention.
Figure 3 is a diagram schematically showing the operating state of a two-stage structural braking system capable of emergency braking in an emergency according to the present invention.
Figure 4 is an enlarged view of part A of Figure 3.
Figure 5 is a flow chart showing the operation process of a two-stage structural braking system capable of emergency braking in an emergency according to the present invention.

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

Before explaining the present invention in detail, the terms or words used in this specification should not be construed as unconditionally limited to their ordinary or dictionary meanings, and the inventor of the present invention should not use the terms or words in order to explain his invention in the best way. It should be noted that the concepts of various terms can be appropriately defined and used, and furthermore, that these terms and words should be interpreted with meanings and concepts consistent with the technical idea of the present invention.

That is, the terms used in this specification are only used to describe preferred embodiments of the present invention, and are not used with the intention of specifically limiting the content of the present invention, and these terms refer to various possibilities of the present invention. It is important to note that this is a term defined with consideration in mind.

In addition, in this specification, it should be noted that singular expressions may include plural expressions unless the context clearly indicates a different meaning, and that even if similarly expressed in plural, they may include singular meanings. do.

Throughout this specification, when a component is described as “including” another component, it does not exclude any other component, but rather includes any other component, unless specifically stated to the contrary. It could mean that you can do it.

Furthermore, if a component is described as being “installed within or connected to” another component, it means that this component may be installed in direct connection or contact with the other component and may be installed in contact with the other component and It may be installed at a certain distance, and in the case where it is installed at a certain distance, there may be a third component or means for fixing or connecting the component to another component. It should be noted that the description of the components or means of 3 may be omitted.

On the other hand, when a component is described as being “directly connected” or “directly connected” to another component, it should be understood that no third component or means is present.

Likewise, other expressions that describe the relationship between each component, such as "between" and "immediately between", or "neighboring" and "directly neighboring", have the same meaning. It should be interpreted as

In addition, in this specification, terms such as "one side", "other side", "one side", "the other side", "first", "second", etc., if used, refer to one component. It is used to clearly distinguish it from other components, and it should be noted that the meaning of the component is not limited by this term.

In addition, in this specification, terms related to position such as "top", "bottom", "left", "right", etc., if used, should be understood as indicating the relative position of the corresponding component in the corresponding drawing. Unless the absolute location is specified, these location-related terms should not be understood as referring to the absolute location.

Moreover, in the specification of the present invention, terms such as “… unit”, “… unit”, “module”, “device”, etc., when used, mean a unit capable of processing one or more functions or operations, which is hardware. Alternatively, it should be noted that it can be implemented through software, or a combination of hardware and software.

In addition, in this specification, when specifying the reference numeral for each component in each drawing, the same component has the same reference number even if the component is shown in different drawings, that is, the same reference is made throughout the specification. The symbols indicate the same component.

In the drawings attached to this specification, the size, position, connection relationship, etc. of each component constituting the present invention is exaggerated, reduced, or omitted in order to convey the idea of the present invention sufficiently clearly or for convenience of explanation. It may be described, and therefore its proportions or scale may not be exact.

In addition, hereinafter, in describing the present invention, detailed descriptions of configurations that are judged to unnecessarily obscure the gist of the present invention, for example, known technologies including prior art, may be omitted.

Figure 1 is a diagram showing a two-stage structural braking system capable of emergency braking in an emergency according to the present invention, and Figure 2 is a schematic view of a two-stage structural braking system capable of emergency braking in an emergency according to the present invention as viewed from the side. This is a drawing shown as .

The two-stage brake system capable of emergency braking in an emergency according to the present invention applies physical force to the electronic brake system and the brake pedal 10 when the electric signal does not operate (transmit) to the electronic brake system. It is configured to include a hydraulic brake system for braking.

The electronic brake system receives the driver's intention to brake as an electrical signal from a pedal displacement sensor that detects the displacement of the brake pedal (10) when the driver steps on the brake pedal (10) with a leg force within a certain range (normal operating range). A hydraulic pressure supply device is provided that supplies the hydraulic pressure necessary for braking to the wheel cylinder.

In general, an electronic brake system is a system in which all hydraulic lines of existing vehicles have been removed, and all braking is controlled by electrical and electronic devices.

In other words, the electronic brake system converts the force with which the driver presses the brake pedal 10 into an electrical signal to brake, instead of the hydraulic brake system used in vehicles.

For example, when the driver steps on the brake pedal 10, the simulator attached to the brake pedal 10 converts this into an electrical signal and transmits it to the electronic control unit (ECU), which monitors the vehicle status and It is a system that calculates braking force and controls four electric calipers.

Therefore, the electronic brake system integrates and controls the existing ABS, TCS, BAS, and ESP (Electronic Stability Program) functions and is capable of controlling the vehicle's posture in any situation. When the electronic brake system is applied, the car uses the master cylinder and booster. Many of the parts in existing hydraulic lines, such as those in existing hydraulic lines, are no longer needed, so the number of braking-related parts is greatly reduced.

This has the advantage of greatly increasing flexibility in automobile design by simplifying the structure of the brake system.

In addition, the electronic brake system does not require time for hydraulic pressure to be transmitted and enables active control of the vehicle's braking force, so it has the advantage of shorter braking distance than the existing hydraulic brake system.

Not only does the driver's safety improve, but electronic braking makes it very easy to use the brake pedal and has the advantage of not generating any vibration or braking noise.

In the hydraulic brake system, when the electric signal does not operate in the electronic brake system, when the driver presses the brake pedal 10 with a pressure exceeding a certain range (normal operating range) applied to the brake pedal 10 in the electronic brake system, the brake pedal 10 ) is a system that is converted from an electronic brake system by a predetermined conversion module 20 arranged to contact.

At this time, the hydraulic pressure necessary for braking is supplied to the wheel cylinder using the hydraulic passage and vacuum booster connected to the conversion module 20.

This hydraulic brake system is a brake system that uses Pascal's principle to obtain braking force through hydraulic power. It consists of a master cylinder that generates hydraulic pressure when the brake pedal is pressed, and a wheel that receives the hydraulic pressure and pushes the brake shoes to the drum to generate braking force. It consists of a cylinder and a brake pipe or hose that forms a flow path.

Since the configuration of such an electronic or hydraulic brake system is a well-known technology, detailed description thereof will be omitted.

Figure 3 is a diagram schematically showing the operating state of a two-stage structural braking system capable of emergency braking in an emergency according to the present invention, and Figure 4 is an enlarged diagram of part A of Figure 3.

The conversion module 20 that switches from the electronic brake system to the hydraulic brake system includes a hollow case 21, a rotating member 23, and a changeover switch 25.

The hollow case 21 is preferably formed in a hexahedral shape, but is not limited to this.

This case 21 is located below the brake pedal 10 and one longitudinal end of the brake pedal 10 is coupled thereto.

In addition, a fitting hole 21a is formed in a portion of the upper surface of the case 21 opposite to the other end of the brake pedal 10, which penetrates upward and downward.

It is desirable that the inner diameter of the fitting hole 21a be larger than the outer diameter of the other end of the rotating member 23, which will be described later.

Accordingly, the rotating member 23 is inserted into the fitting hole 21a so that the other end of the rotating member 23 is exposed to the outside of the upper surface of the case 21.

The rotating member 23 is formed to have a predetermined length, and one end is coupled to rotate at a preset rotation angle inside the case 21.

That is, the rotating member 23 may be provided to pivot (rotate) when a preset torque is applied, such as with a torque wrench.

Meanwhile, a pressure protrusion 12 of a predetermined length is formed to protrude from the bottom of the other end of the brake pedal 10.

When the driver steps on the brake pedal 10 with a pedal force above the normal operating range of the electronic brake system, that is, a certain range, the other end of the rotating member 23 exposed to the outside of the upper surface of the case 21 is pressed by the pressing protrusion 12. It is pressurized and accommodated inside the case 21, and at this time, the rotating member 23 rotates at a preset rotation angle.

Such a rotating member 23 is preferably made of an elastic material that can be contracted and restored in the longitudinal direction.

Alternatively, the rotating member 23 is made of a hollow cylindrical shape with different diameters, and a plurality of rod members having a predetermined length are coupled in a multi-stage manner in the longitudinal direction, and are elastically coupled to each other (for example, connected by springs). It may be done with

Accordingly, when one of the rod members exposed to the outside of the upper surface of the case 21 is pressed by the pressing protrusion 12, the pressed rod member is accommodated inside the case 21, and the case The bar member accommodated inside (21) is elastically restored and rotates at a preset rotation angle.

On the other hand, if the rotating member 23 is not made of an elastic material, the insertion hole 21a formed on the upper surface of the case 21 is rotated so that it can rotate at a preset rotation angle after being pressed by the pressing protrusion 12. The member 23 may be formed in a long rectangular shape along the rotation direction.

In addition to the above-described form, the rotating member 23 can be configured so that the externally exposed portion of the upper surface of the case 21 is pressed by the pressing protrusion 12 and is accommodated inside the case 21, and then rotated at a preset rotation angle. , it does not matter what configuration it has.

The changeover switch 25 is installed inside the case 21, and is turned on by being pressed by the other end of the rotating member 23 when the rotating member 23 rotates.

When the changeover switch 25 is turned on, hydraulic pressure is supplied to the wheel cylinder using the hydraulic passage 30 and a vacuum booster (not shown).

Figure 5 is a flow chart showing the operation process of a two-stage structural braking system capable of emergency braking in an emergency according to the present invention.

When the driver operates the brake by stepping on the brake pedal 10, if the torque value due to the pedal force with which the driver steps on the brake pedal 10 is within a preset torque value (within the normal operating range of the brake pedal 10), It operates as an electronic brake system, and when the torque value caused by the driver's pedal pressure on the brake pedal 10 is more than a preset torque value (more than the normal operating range of the brake pedal 10), the hydraulic brake system is activated by the conversion module 20. It works as follows.

That is, when operating as a hydraulic brake system, the hydraulic pressure necessary for braking is supplied to the wheel cylinder using the hydraulic passage 30 and the vacuum booster connected to the conversion module 20, thereby blocking the rotational force of the motor and enabling emergency braking. do.

As such, the present invention has a two-stage structure so that when the electric signal does not work in the electronic brake system, it can be converted to a physical hydraulic brake system, so it has the advantage of being able to quickly respond to dangerous emergency situations without taking your hands off the handle. .

Above, various preferred embodiments of the present invention have been described by giving some examples, but the description of the various embodiments described in the "Detailed Contents for Carrying out the Invention" section is merely illustrative and the present invention Those skilled in the art will understand from the above description that the present invention can be implemented with various modifications or equivalent implementations of the present invention.

In addition, since the present invention can be implemented in various other forms, the present invention is not limited by the above description, and the above description is intended to make the disclosure of the present invention complete and is commonly used in the technical field to which the present invention pertains. It is provided only to fully inform those with knowledge of the scope of the present invention, and it should be noted that the present invention is only defined by each claim in the claims.

10: brake pedal
12: Pressure protrusion
20: conversion module
21: case
21a: insertion hole
23: Rotating member
25: changeover switch
30: Hydraulic flow path

Claims (6)

When the driver steps on the brake pedal with a leg force within a certain range, the driver's intention to brake is transmitted as an electrical signal from the pedal displacement sensor that detects the displacement of the brake pedal, and a hydraulic pressure supply device supplies the hydraulic pressure necessary for braking to the wheel cylinder. Equipped with an electronic braking system; and
When the electric signal does not operate in the electronic brake system, when the driver steps on the brake pedal with a pedal force exceeding the predetermined range, the hydraulic flow path is switched by a predetermined conversion module arranged to contact the brake pedal and connected to the conversion module. And a hydraulic brake system that supplies hydraulic pressure necessary for braking to the wheel cylinder using a vacuum booster.
Two-stage braking system capable of emergency braking in an emergency.
In claim 1,
The conversion module is,
a hollow case located below the brake pedal and coupled to one end of the brake pedal;
a rotating member having a predetermined length, one end of which is coupled to rotate at a preset rotation angle within the case; and
A changeover switch installed inside the case and turned on by being pressed by the other end of the rotating member when the rotating member rotates.
Two-stage braking system capable of emergency braking in an emergency.
In claim 2,
A fitting hole is formed on the upper surface of the case, penetrating upward and downward,
The rotating member is inserted into the fitting hole so that the other end of the rotating member is exposed to the outside of the upper surface of the case.
Two-stage braking system capable of emergency braking in an emergency.
In claim 3,
A pressing protrusion of a predetermined length is formed to protrude from the bottom of the other end of the brake pedal,
When the brake pedal is pressed with a force exceeding the predetermined range, the other end of the rotating member exposed to the outside of the upper surface of the case is pressed by the pressing protrusion and is received inside the case and rotated at a preset rotation angle.
Two-stage braking system capable of emergency braking in an emergency.
In claim 4,
The rotating member is formed of an elastic material that can be contracted and restored in the longitudinal direction,
Two-stage braking system capable of emergency braking in an emergency.
In claim 2,
When the conversion switch is turned on, hydraulic pressure is supplied to the wheel cylinder using the hydraulic passage and vacuum booster.
Two-stage braking system capable of emergency braking in an emergency.

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