KR20080100883A - Pressure difference vibration noise decreasing typed vacuum brake booster - Google Patents

Pressure difference vibration noise decreasing typed vacuum brake booster Download PDF

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Publication number
KR20080100883A
KR20080100883A KR1020070046869A KR20070046869A KR20080100883A KR 20080100883 A KR20080100883 A KR 20080100883A KR 1020070046869 A KR1020070046869 A KR 1020070046869A KR 20070046869 A KR20070046869 A KR 20070046869A KR 20080100883 A KR20080100883 A KR 20080100883A
Authority
KR
South Korea
Prior art keywords
valve
vibration
brake booster
poppet valve
vacuum brake
Prior art date
Application number
KR1020070046869A
Other languages
Korean (ko)
Inventor
김상윤
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 KR1020070046869A priority Critical patent/KR20080100883A/en
Publication of KR20080100883A publication Critical patent/KR20080100883A/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise

Abstract

The present invention relates to a vibration sound reduction type vacuum brake booster caused by a negative pressure difference, and at the time of initial operation of the control valve (4) according to the brake pedal operation, the opening speed of the valve is the smallest and the air flow rate is formed at the fastest moment. When this is done, it catches the inconsistent behavior of the poppet valve 6 through the vortices formed by the inefficient air flow, so that the vibration and noise of the booster caused by the unstable poppet valve 6 are prevented from occurring. do.

Description

Pressure difference vibration noise decreasing type vacuum brake booster by negative pressure difference

1 (a), (b) is a configuration diagram of a vibration sound reduction type vacuum brake booster caused by a negative pressure difference according to the present invention

Figure 2 is a perspective view of a vibration control member for reducing the vibration sound caused by the negative pressure difference in accordance with the present invention

3 is a cross-sectional view of the vibration control member in accordance with the present invention

    <Description of the symbols for the main parts of the drawings>

1: Operating rod 2: Control valve unit

3: chamber unit 3a: transformer chamber

3b: vacuum chamber 4: control valve

5: plunger valve 6: poppet valve

7: boot 8: vibration control member

9: annular border 10: friction fitting

10a: extension joint 10b: friction extension

t: protruding jaw spacing

The present invention relates to a vacuum brake booster, and more particularly, to a vibration sound reduction type vacuum brake booster caused by an internal negative pressure difference during operation.

In general, a brake system of a vehicle decelerates or stops a traveling vehicle, and in the case of a passenger vehicle, a hydraulic brake is used to brake the hydraulic pressure generated by manipulating a brake pedal. .

In the case of such a hydraulic brake, the hydraulic cylinder is generated by a force applied by a booster that forms a pressure difference between atmospheric pressure and vacuum according to the amount of depression of the brake pedal operated by the driver. There is an air type that uses the pressure provided from the engine driven compressor to amplify the brake pedal operation force and provide it to the master cylinder. However, in the case of a passenger vehicle, a vacuum type that uses the negative pressure of the engine intake manifold is used. .

The vacuum booster uses a plunger valve and a poppet valve to form a pressure difference between atmospheric pressure and vacuum inside while acting under the operating force of the brake pedal, that is, the plunger valve is driven by the brake pedal. When moving in the axial direction to form a relative distance difference in the valve body, the atmospheric pressure introduced through the space according to the relative distance difference forms a vacuum and a pressure difference to push the diaphragm to push the diaphragm to the pedal force to add the atmospheric pressure to the master cylinder. It will work.

At this time, the poppet valve is in close contact with the plunger valve returned when the brake pedal is released, and serves to block the atmospheric pressure introduced into the valve body.

However, this booster is formed at the moment when the valve is operated, the moment when the valve opening amount is the smallest, but the air flow rate is the fastest moment, the vortex occurs in the outside of the air flow is not smooth, and the force of the vortex As a result of acting on a poppet valve, an inconsistent behavior of the valve opening is caused several times in an instant, which causes vibration and noise in the booster.

This phenomenon, especially in the case of a diesel car with a high degree of vacuum during the initial operation of the booster is a large negative pressure difference, the air vortex acting on the valve is generated rapidly, resulting in a vibration noise of the valve and noise (ie, poppet valve) Due to the rapid generation of air vortices acting on the valve, there is a vulnerability with the phenomenon that the valve vibrates and is accompanied by a "blowing" sound.

Accordingly, the present invention has been made in view of the above, and an object thereof is to improve the vibration sound by controlling the movement (vibration) of the poppet valve even when a large negative pressure difference is formed according to a high degree of vacuum during initial booster operation.

In addition, an object of the present invention is to guide the slow motion of the poppet valve caused by the formation of a large negative pressure difference, to ensure a stable contact between the plunger valve.

The present invention for achieving the above object, the plunger valve and the plunger valve which is interlocked with the operating rod which is axially moved during the operation of the brake pedal, while the vacuum brake booster is elastically supported by the spring inside the control valve wrapped in the boot, A control valve unit composed of a reaction pipe and a reaction piston pressurized by the plunger valve, the poppet valves being spaced apart from each other, and forming an atmospheric pressure inflow passage;

A chamber unit for forming a vacuum negative pressure for operating the master cylinder through the atmospheric pressure introduced into the negative pressure chamber (vacuum) through the diaphragm and into a transformer chamber (atmospheric pressure) partitioned therein according to the operation of the control valve unit;

A vibration control member coupled to the axis of the operating rod to tightly support the poppet valve together with the plunger valve to restrain unstable movement of the poppet valve due to vortex formation in the control valve;

Characterized in that consisting of.

In addition, the vibration control member forms an annular rim having a width while closely supporting the poppet valve, and is radially protruded from the annular rim so as to be fitted on the axis of the operating rod to be fitted to the poppet valve and at the same time to the plunger valve. Form the fitting ends.

The friction fitting end forms a protruding jaw gap protruding from the inner diameter of the annular rim, and an extended joint end protruding radially inward to narrow the inner diameter is formed, and an end of the operating rod is formed at the end of the extended end end. A friction extension end is formed which is bent at the extension joint end so as to fit on the shaft and fit into the inner diameter of the plunger valve.

In addition, the extended joint ends are formed symmetrically with each other with a 60 ° intervals, the friction extension ends are extended while bent 90 ° to the extension joint ends.

The vibration control member is made of resin.

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

Figure 1 (a), (b) is a diagram showing the configuration of the vibration sound reduction type vacuum brake booster due to the negative pressure difference according to the present invention, the present invention inflow atmospheric pressure according to whether the operation of the brake pedal pedal A vacuum brake booster that operates the master cylinder that supplies hydraulic pressure to the wheel cylinder (or caliper) that brakes the wheels by the pressure difference between the atmospheric pressure and the vacuum.

A control valve unit (2) having a poppet valve (6), a plunger valve (5) and a control valve (4) operated through an operating rod (1) axially moved by a depression amount of the brake pedal, and a diaphragm A chamber for forming a vacuum negative pressure for operating the master cylinder through the atmospheric pressure introduced into the negative pressure chamber 3b (vacuum) and the transformer chamber 3a (atmospheric pressure) partitioned therein according to the operation of the control valve unit 2. The poppet valve 6 and the plunger valve 5 to guide the movement of the poppet valve 6 according to the formation of a large negative pressure difference between the unit 3 and the chamber unit 3 to control vibration (vibration) to reduce vibration noise. It consists of a vibration control member (8) positioned between.

The control valve unit 2 is made up of a control valve 4 wrapped in a boot 7 to form an atmospheric pressure passage toward the chamber unit 3 during operation, and inside the control valve 4 with a spring. While being elastically supported, a plunger valve 5 interlocked with the operating rod 1 that is axially moved when the brake pedal is operated is provided, and forms a gap when the plunger valve 5 is moved by the operating rod 1. A poppet valve 6 is located, in which the reaction disk and the reaction piston pressurized by the plunger valve 5 at the leading end of the control valve 4 are sequentially positioned towards the chamber unit 3.

In addition, the vibration control member 8 is inserted into the inner surface of the plunger valve 5 in a state coupled to the operating rod (1), while supporting the poppet valve (6) to form a structure fitted into the inner diameter.

To this end, the vibration control member 8 forms an annular rim 9 having a predetermined width as shown in FIG. 2, and protrudes radially from the annular rim 9 on the axis of the operating rod 1. The friction fitting end 10 to be fitted is formed.

Here, the friction fitting end 10 is protruding from the inner diameter of the annular rim 9 to form a predetermined protruding jaw gap t, and the extended joint end 10a protruding radially inward to narrow the inner diameter is formed. Friction formed to be bent at 90 ° to the extension joint 10a so as to be fitted to the inner diameter of the plunger valve 5 while being fitted on the shaft of the operating rod 1 to the end of the extension joint 10a. The extended end 10b is formed.

Here, the protruding jaw spacing t is made of a width having a sufficient support section while having a length shorter than the thickness of the poppet valve 6.

In addition, the extended joint ends 10a are formed symmetrically with each other at intervals of about 60 °.

And, the vibration control member 8 is made of a resin as a whole.

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

The vacuum brake booster of the present invention is formed due to inadequate air flow when an initial operation of the control valve 4 according to the brake pedal operation is made at the moment when the opening amount of the valve is the smallest and the air flow rate is the fastest. By catching the inconsistent behavior of the poppet valve (6) through the vortex, the vibration and noise of the booster due to the unstable poppet valve (6) is characterized by blocking the generation.

That is, in the brake booster of the present invention, when the operating rod 1 axially moves the plunger valve 5 by the depression amount of the brake pedal, the brake booster of FIG. As the gap between the poppet valve 6 and the control valve 4 moves forward, the reaction disk and the reaction piston are sequentially operated through the plunger valve 5, so that the chamber unit 3 Atmospheric pressure flows into the transformer chamber (a) to form a booster output.

Unstable behavior of the poppet valve 6 during normal operation of such a booster, especially during the initial operation of the airflow velocity of the poppet valve 6 at the moment when the opening amount of the control valve 4 is the smallest. By using the vibration control member (8), in the case of a diesel car with a high degree of vacuum will be more severe trembling and at the same time block the phenomenon of "swelling ~ boom" sound.

That is, the vibration control member 8 is connected to the plunger valve 5 and the plunger valve 5 coupled to the operating rod 1 in the control valve 4 forming the atmospheric pressure passage as shown in FIG. 3. It is positioned at the position of the poppet valve (6) fixed to the body portion of the control valve (4) at intervals, and is coupled to support the end of the plunger valve (5) in close contact with the poppet valve (6). .

This means that when the vibration control member 8 is coupled on the shaft of the operating rod 1, the annular rim 9 is in close contact with the poppet valve 6 and at the same time an extended joint end 10a forming a friction fitting end 10. ) Is inserted into the inner diameter of the poppet valve 6, the poppet valve 6 is strongly supported by the protruding jaw of the annular rim 9 and the extended joint end 10a to prevent shaking due to vortex It is done.

At this time, since the protruding jaw gap t of the extension joint 10a has a length shorter than the thickness of the poppet valve 6, the width of the poppet valve 6 does not depart.

In addition, as the vibration control member 8 is coupled on the axis of the operating rod 1, the friction extended by bending 90 ° with respect to the extended joint end 10a protruding radially from the annular rim 9 The extended end 10b is fitted into the inner diameter of the plunger valve 5, whereby the end portion of the plunger valve 5 is supported by the friction extended end 10b.

As the vibration control member 8 coupled to the shaft of the operating rod 1 thus supports the end of the plunger valve 5, in particular, it is brought into close contact with the poppet valve 6 and fitted into its inner diameter. In the initial operation of the booster, even if the force caused by the rapid air vortex acts as the poppet valve 6, the movement of the poppet valve 6 is slow, thereby preventing the occurrence of tremor and noise caused by the high negative pressure difference.

As described above, according to the present invention, between the plunger valve and the poppet valve coupled on the shaft of the operating rod, the poppet valve portion positioned at intervals with respect to the plunger valve is in close contact with each other. In addition, by catching the inconsistent behavior of the poppet valve through the vortex formed by the air flow is not smooth, it is effective to block the vibration and noise generated by the booster caused by the unstable poppet valve.

In addition, the present invention prevents unstable behavior by catching the poppet valve without invalid stroke adjustment operation to block the generation of vibration and noise of the booster, to prevent excessive stroke time and line defects generated due to the very small invalid stroke adjustment section. There is an effect that can be solved fundamentally.

Claims (7)

The plunger valve 5 and the plunger valve 5 interlocked with the operating rod 1 axially moved when the brake pedal is operated while being supported by a spring in the control valve 4 wrapped in the boot 7. A control valve unit (2) composed of a poppet valve (6) positioned at intervals relative to each other, a reaction disk pressurized by the plunger valve (5), a reaction piston, and the like to form an atmospheric pressure inflow passage; The vacuum negative pressure for operating the master cylinder through the atmospheric pressure introduced into the negative pressure chamber 3b (vacuum) through the diaphragm and into the transformer chamber 3a (atmospheric pressure) in which the inside is partitioned is formed in accordance with the operation of the control valve unit 2. Chamber unit 3; In order to restrain the unstable movement (vibration) of the poppet valve 6 due to the formation of the vortex in the control valve 4, it is coupled on the axis of the operating rod 1 to closely adhere the poppet valve 6 together with the plunger valve 5. Supporting vibration control member (8); Vibration sound reduction type vacuum brake booster caused by negative pressure difference. 2. The vibration rod (8) according to claim 1, wherein the vibration control member (8) forms an annular edge (9) having a width while closely supporting the poppet valve (6), and radially protrudes from the annular edge (9). A vibration sound reduction type vacuum brake booster caused by negative pressure differential, characterized in that it forms a friction fitting end (10) which is fitted on the shaft of the fitting and which is fitted to the poppet valve (6) and also to the plunger valve (5). 3. The extension joint 10a of claim 2, wherein the friction fitting end 10 protrudes radially inwards to narrow the inner diameter while forming a protruding jaw gap t protruding from the inner diameter of the annular rim 9. Is formed, and the frictional extension extending while being bent at the extension joint end 10a so as to be fitted to the inner diameter of the plunger valve 5 while being fitted on the shaft of the operating rod 1 at the end of the extension joint end 10a. A vibration sound reduction type vacuum brake booster due to a negative pressure difference, characterized in that a stage (10b) is formed. The vibration sound deterioration type vacuum brake booster according to claim 3, wherein the protruding jaw gap t has a length shorter than the thickness of the poppet valve. The vibration sound reduction type vacuum brake booster according to claim 3, wherein the extended joint ends (10a) are formed symmetrically with each other at intervals of 60 °. The vibration sound reduction type vacuum brake booster according to claim 3, wherein the friction extension end (10b) extends while being bent at 90 ° with respect to the extension joint (10a). The vibration sound reduction type vacuum brake booster according to claim 1 or 2, wherein the vibration control member (8) is made of resin.
KR1020070046869A 2007-05-15 2007-05-15 Pressure difference vibration noise decreasing typed vacuum brake booster KR20080100883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070046869A KR20080100883A (en) 2007-05-15 2007-05-15 Pressure difference vibration noise decreasing typed vacuum brake booster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070046869A KR20080100883A (en) 2007-05-15 2007-05-15 Pressure difference vibration noise decreasing typed vacuum brake booster

Publications (1)

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KR20080100883A true KR20080100883A (en) 2008-11-21

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120006753A (en) * 2010-07-13 2012-01-19 현대자동차주식회사 Brake booster for vehicle
KR20120047605A (en) * 2010-11-04 2012-05-14 현대모비스 주식회사 Spring unit of booster
KR20180065537A (en) * 2016-12-08 2018-06-18 주식회사 만도 Brake booster for vehicle
KR20180135592A (en) * 2017-06-13 2018-12-21 주식회사 만도 The break booster of the vehicle
KR20190041152A (en) * 2017-10-12 2019-04-22 현대모비스 주식회사 Device for guiding plunger valve
KR102065178B1 (en) * 2018-07-12 2020-02-11 주식회사 만도 Valve Cylinder of Brake Booster

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120006753A (en) * 2010-07-13 2012-01-19 현대자동차주식회사 Brake booster for vehicle
KR20120047605A (en) * 2010-11-04 2012-05-14 현대모비스 주식회사 Spring unit of booster
KR20180065537A (en) * 2016-12-08 2018-06-18 주식회사 만도 Brake booster for vehicle
KR101868842B1 (en) * 2016-12-08 2018-06-21 주식회사 만도 Brake booster for vehicle
KR20180135592A (en) * 2017-06-13 2018-12-21 주식회사 만도 The break booster of the vehicle
KR20190041152A (en) * 2017-10-12 2019-04-22 현대모비스 주식회사 Device for guiding plunger valve
KR102065178B1 (en) * 2018-07-12 2020-02-11 주식회사 만도 Valve Cylinder of Brake Booster

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