KR20090027008A - Brake booster for vehicle - Google Patents

Brake booster for vehicle Download PDF

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Publication number
KR20090027008A
KR20090027008A KR1020070092159A KR20070092159A KR20090027008A KR 20090027008 A KR20090027008 A KR 20090027008A KR 1020070092159 A KR1020070092159 A KR 1020070092159A KR 20070092159 A KR20070092159 A KR 20070092159A KR 20090027008 A KR20090027008 A KR 20090027008A
Authority
KR
South Korea
Prior art keywords
brake booster
vehicle
reaction
plunger valve
reaction piston
Prior art date
Application number
KR1020070092159A
Other languages
Korean (ko)
Inventor
구창회
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020070092159A priority Critical patent/KR20090027008A/en
Publication of KR20090027008A publication Critical patent/KR20090027008A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/569—Vacuum systems indirect, i.e. vacuum booster units characterised by piston details, e.g. construction, mounting of diaphragm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/573—Vacuum systems indirect, i.e. vacuum booster units characterised by reaction devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

A brake booster for vehicle is provided to maintain the optimum braking performance of vehicle by allowing the gap between the plunger valve and the reaction disk to be adjusted when needed. A brake booster for vehicle comprises a reaction piston(33) whose one side is connected to a plunger valve(31) and the other side is installed in a reaction disk(32), and a valve body(35) fixed in a booster housing(34). The reaction piston reciprocates straight along with the rotation of the plunger valve. The valve body includes a first chamber(35a) which is prepared in one side of the internal space in order to accommodate the plunger valve and an operating rod(36), a second chamber(35b) which is prepared in the other side of the internal space in order to accommodate the reaction disk, and a guide hole(35c) which is prepared in order to accommodate the reaction piston while connecting the first and the second chamber.

Description

Brake booster for vehicle

The present invention relates to a brake booster for a vehicle that is capable of adjusting a gap provided between a plunger valve and a reaction disk.

In general, a brake system of a vehicle includes a brake booster that amplifies the stepping force of the brake pedal by using a difference between a negative pressure (vacuum pressure) generated by an engine and an atmospheric pressure.

As shown in FIG. 1, the brake booster 10 includes an operating rod 11 coupled with a brake pedal 1 and clevis pins, and a plunger valve coupled with the operating rod 11 in a ball joint form. And a reaction disk 13 spaced apart from the front of the plunger valve 12.

Here, the clearance C1 provided between the plunger valve 12 and the reaction disk 13 is removed by contacting the plunger valve 12 with the reaction disk 13 which is deformed when the braking force is generated.

On the other hand, the gap (C1) is set in advance according to the characteristics of the vehicle, once the setting is complete there is a feature that can not be readjusted unless disassembling the brake booster (10).

The gap C1 appears as a jump-in section in which the output of the brake booster 10 increases only when the driver presses the brake pedal 1 in the power-up characteristic of the brake booster 10 without increasing the step force. The jump-in section serves as an important factor for determining when braking occurs when the driver steps on the brake pedal 1.

If the gap C1 is excessively large, the braking speed is increased, and a sudden braking phenomenon occurs even if the driver presses the brake pedal 1 only slightly. On the contrary, if the gap C1 is too narrow, the braking force generation point is delayed, resulting in an accident. There is a concern.

Thus, the gap C1 serves as an important factor for determining the characteristics of the brake booster 10.

However, the conventional brake booster 10 has a disadvantage in that it is difficult for the vehicle to exhibit an optimum braking performance because the clearance C1 cannot be adjusted.

That is, the vehicle should be able to exhibit the optimum braking performance in consideration of all surrounding conditions such as the driver's body type, driving habits, driving conditions, and the type of vehicle, and the adjustment of the gap C1 for determining the timing of the braking force Due to the impossible brake booster 10, the vehicle has a disadvantage that it is difficult to achieve the optimum braking performance.

In addition, when a change occurs in the gap C1 due to the durability and fatigue increase due to long-term use, the brake booster 10 should be replaced with a new one according to the characteristic that the gap C1 cannot be adjusted, and thus the repair cost There was also a disadvantage of this excess.

Accordingly, the present invention is to provide a brake booster that can adjust the gap provided between the plunger valve and the reaction disk as necessary, so that the vehicle can always exhibit the optimum braking performance, and over-expenditure of repair cost The aim is to be able to prevent them.

The brake booster of the present invention for achieving the above object, one side is coupled to the plunger valve and the other side is installed to form a gap between the reaction disk and the linear reciprocating movement along the rotation of the plunger valve Reaction piston to be adjusted; characterized in that it comprises a.

According to the present invention, the clearance provided between the plunger valve and the reaction disk can be adjusted through the reaction piston during the rotation operation of the operating rod, taking into account all the surrounding conditions such as the driver's body shape, driving habits, driving conditions, and types of vehicles. Therefore, it is possible to simplify the adjustment of the jump-in section to determine the occurrence point of the braking force, thereby enabling the maintenance of the vehicle so that the optimum braking performance can always be exhibited.

In addition, the present invention, when a change in the gap provided between the plunger valve and the reaction disk due to the durability and fatigue increase with long-term use, it is possible to adjust the gap through a simple repair without replacing the brake booster with a new one In addition, the repair cost can be reduced.

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

2 shows a brake booster according to the invention.

As shown, the brake booster 30 according to the present invention has one side coupled to the plunger valve 31 and the other side installed to form a gap C2 between the reaction disk 32 and the plunger valve 31. Reaction piston 33 is configured to adjust the gap (C2) while moving straight reciprocating according to the rotation of.

In addition, the brake booster 30 according to the present invention includes a space in which the plunger valve 31, the reaction disk 32, and the reaction piston 33 are accommodated in the booster housing 34. The valve body 35 is fixedly installed, and one end of the valve body 35 penetrates with the plunger valve 31 and the other end further comprises an operating rod 36 coupled with the brake pedal 1. .

Here, the valve body 35, as shown in Figures 2 and 3, the first chamber (35a) provided in the inner space of one side to accommodate the plunger valve 31 and the operating rod (36) And the reaction piston 33 while connecting the second chamber 35b provided in the inner space of the other side to accommodate the reaction disk 32 and the first and second chambers 35a and 35b. It is a structure comprised so that the guide hole 35c provided so that it may be provided.

On the other hand, the guide hole 35c provided in the valve body 35 guides the linear reciprocation movement of the reaction piston 33 and has a polygonal cross section so that the rotational movement of the reaction piston 33 is impossible. Is formed.

The guide hole 35c is preferably formed to have a hexagonal cross-sectional shape as shown, but is not limited thereto.

The outer circumferential surface of the reaction piston 33 is formed in the same polygonal shape as that of the cross section of the guide hole 35c.

That is, as shown in Figure 4 is preferably formed to have a hexagonal cross-sectional shape, but is not limited thereto.

In addition, one side surface 33a of the reaction piston 33 facing the plunger valve 31 is formed to have an inclined cross section, and the other side surface 33b facing the reaction disk 32 has a vertical cross section. Is formed.

Here, a coupling protrusion 331 is formed at the center of one side 33a of the reaction piston 33, and a circular groove 332 is formed around the coupling protrusion 331.

Meanwhile, as shown in FIG. 5, the plunger valve 31 is integrally formed from the body portion 31a coupled with the operating rod 36 and the burfield joint 311 and the body portion 31a. And a valve hole 313 contacting the circular hole 332 of the reaction piston 33 and the coupling hole 312 into which the coupling protrusion 331 of the reaction piston 33 is inserted at the tip thereof. It consists of one protrusion part 31b.

One end of the operating rod 36 is formed with a spline 36a inserted into the burfield joint 311 to form a coupling, and the other end of the ball joint 36b coupled with the brake pedal 1. It is a structure formed integrally.

Hereinafter, the operation of the present invention will be described.

First, in the brake booster 30 of the present invention, since the reaction piston 33 is coupled to each other with the plunger valve 31, the gap C2 formed between the reaction disc 32 and the reaction piston 33 is used. Note that the concept of) is the same as the concept of the gap (C1) described above with reference to FIG.

In consideration of all surrounding conditions such as the driver's body type, driving habits, driving conditions, and type of vehicle, it is necessary to adjust the jump-in section among the power boost characteristics of the brake booster 10, or reduce durability due to long-term use. And a problem in braking performance due to increased fatigue, and when it is necessary to adjust the gap C2 formed between the reaction disc 32 and the reaction piston 33, the operator first engages with the brake pedal 1; The operating rod 36 is rotated clockwise or counterclockwise.

When the operating rod 36 rotates, the plunger valve 31 coupled with the spline 36a rotates, and when the plunger valve 31 rotates, the valve protrusion 313 is inclined at the reaction piston 33. It moves along the circular groove 332 formed on the side surface (33a).

Here, the valve protrusion 313 moves along the circular groove 332 to press the reaction piston 33 toward the reaction disk 32 when the operating rod 36 and the plunger valve 31 rotate in one direction. When the reaction piston 33 is linearly moved toward the reaction disc 32 by the pressing force of the valve protrusion 313, the gap formed between the reaction disc 32 and the reaction piston 33 is reduced. C2) is adjusted to narrow.

The operator ends the work after adjusting the gap C2 to be narrowed as desired.

On the contrary, when the operating rod 36 and the plunger valve 31 are rotated in the other direction, the valve protrusion 313 moves along the circular groove 332, whereby the valve protrusion 313 is a reaction piston ( 33) The force under pressure is reduced or eliminated.

In this state, when the operator presses the brake pedal 1, the reaction disk 32 to be deformed pushes the reaction piston 33 toward the plunger valve 31 while contacting the reaction piston 33. The reaction piston 33 is linearly moved toward the plunger valve 31 along the guide hole 35c.

Thereafter, when the operator removes the stepping force from the brake pedal 1, the deformed reaction disk 32 is restored to its original shape, which causes the gap formed between the reaction disk 32 and the reaction piston 33. (C2) is adjusted to widen.

On the other hand, when the driver presses the brake pedal 1, it is possible to obtain a desired braking force by smooth linear movement of the operating rod 36.

Therefore, in the brake booster according to the present invention, the gap C2 provided between the plunger valve 31 and the reaction disk 32 is easily adjusted through the reaction piston 33 during the rotation operation of the operating rod 36. It is possible to simplify the adjustment of the jump-in section to determine the timing of the braking force, thereby allowing the vehicle to maintain and maintain the optimum braking performance at all times.

In addition, the present invention, when a change occurs in the gap (C2) due to the durability and fatigue increase according to long-term use, the gap (C2) control through the easy troubleshooting without replacing the brake booster 30 with a new one Being able to reduce the cost of repairs also has the advantage.

1 is a view for explaining a conventional brake booster,

2 is a view for explaining a brake booster according to the present invention;

3 to 5 are views for explaining the valve body, the reaction piston, the plunger valve and the operating rod constituting the brake booster according to the present invention.

<Description of Symbols for Main Parts of Drawings>

30-Brake Booster 31-Plunger Valve

32-reaction disc 33-reaction piston

34-Booster Housing 35-Valve Body

36-operating rod C2-clearance

Claims (9)

One side is coupled to the plunger valve 31 and the other side is installed to form a gap (C2) between the reaction disk 32 and adjusts the gap (C2) while linearly reciprocating in accordance with the rotation of the plunger valve (31) Reaction piston 33; Vehicle brake booster comprising a. The valve body (35) of claim 1, further comprising a space for accommodating the plunger valve (31), the reaction disc (32), and the reaction piston (33) inside the booster housing (34); Brake booster for the vehicle, characterized in that it further comprises. The method of claim 2, wherein one end of the operating rod 36 is coupled to the plunger valve 31 through the valve body 35 and the other end is coupled to the brake pedal (1); Brake booster for the vehicle, characterized in that it further comprises. The method of claim 3, wherein the valve body 35, A first chamber (35a) provided in one inner space to accommodate the plunger valve (31) and the operating rod (36); A second chamber 35b provided in the inner space of the other side to accommodate the reaction disk 32; A guide hole 35c provided to accommodate the reaction piston 33 while connecting the first and second chambers 35a and 35b; A brake booster for a vehicle comprising: a. The cross section is formed in a polygonal shape so that the guide hole (35c) guides the linear reciprocation of the reaction piston (33) and at the same time the rotational movement of the reaction piston (33) is impossible; The outer circumferential surface of the reaction piston 33 is formed in the same polygonal shape as the cross-sectional shape of the guide hole 35c; Vehicle brake booster characterized in that. The surface 33a of the reaction piston 33, which faces the plunger valve 31, is formed in an inclined cross section, and the other surface 33b facing the reaction disk 32 is vertical. Brake booster for a vehicle, characterized in that formed in one cross-sectional shape. The method according to claim 6, wherein the engaging projection 331 is formed in the center portion of the one side (33a) of the reaction piston 33, characterized in that the circular groove 332 is formed around the engaging projection 331 Car brake booster. The method according to claim 7, wherein the plunger valve 31, A body portion 31a coupled through the operating rod 36 and the burfield joint 311; Protruding portion 31b having a coupling hole 312 into which the coupling protrusion 331 is inserted and a valve protrusion 313 in contact with the circular groove 332 while being integrally formed to protrude from the body portion 31a. ); Vehicle brake booster, characterized in that consisting of. The ball joint (10) of claim 8, wherein one end of the operating rod (36) is formed with a spline (36a) inserted into the burfield joint (311) to form a coupling, and the other end is coupled to the brake pedal (1). 36b) integrally formed brake booster for a vehicle.
KR1020070092159A 2007-09-11 2007-09-11 Brake booster for vehicle KR20090027008A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070092159A KR20090027008A (en) 2007-09-11 2007-09-11 Brake booster for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070092159A KR20090027008A (en) 2007-09-11 2007-09-11 Brake booster for vehicle

Publications (1)

Publication Number Publication Date
KR20090027008A true KR20090027008A (en) 2009-03-16

Family

ID=40694777

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070092159A KR20090027008A (en) 2007-09-11 2007-09-11 Brake booster for vehicle

Country Status (1)

Country Link
KR (1) KR20090027008A (en)

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