CN1326729C - Method for reducing brake noise and air pressure brake noise reducer for implementing the method - Google Patents
Method for reducing brake noise and air pressure brake noise reducer for implementing the method Download PDFInfo
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- CN1326729C CN1326729C CNB2005100115025A CN200510011502A CN1326729C CN 1326729 C CN1326729 C CN 1326729C CN B2005100115025 A CNB2005100115025 A CN B2005100115025A CN 200510011502 A CN200510011502 A CN 200510011502A CN 1326729 C CN1326729 C CN 1326729C
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Abstract
The present invention provides a brake noise reducing method which can be used for effectively reducing and even eliminating the brake noise to be favorable to the environment protection. The present invention comprises a brake control system which transfers the brake force through a brake push rod, wherein the front side and the back side of a piston of the brake push rod are both provided with force application devices. The present invention is characterized in that in the process of braking, the force application magnitude of the force application device which is positioned at the front side of the piston and/or the force application magnitude of the force application device which is positioned at the back side of the piston are/or changed in an active fluctuation way, and the active fluctuation way causes the resultant force magnitude of the brake force transferred by the brake push rod to be changed in a corresponding passive fluctuation way. The present invention also provides a brake noise reducing device for applying the method, which comprises a pneumatic brake noise reducing device.
Description
Technical field
The present invention relates to the noise abatement field, the brake oil device falls in particularly a kind of pneumatic type of falling the method for brake oil and implementing this method.
Background technology
At present, what adopt in drg or the brake equipment mostly is friction braking, mostly adopts drum-type or plate disc brake as the drg of power actuated vehicle, and in braking procedure, friction lining and brake wheel or brake disc be wipe contact under the thrust of brake push rod.Find through the contriver in-depth study,, can cause the vibration that friction means in the brake system produces owing to dynamic friction and static friction, thereby emit a shrill cry, promptly produce brake oil when braking force enough greatly the time.
Summary of the invention
The present invention is directed to the technological deficiency that does not solve brake oil in the prior art, provide a kind of and can effectively reduce even eliminate brake oil, thereby help the method for falling brake oil of environmental protection.
The present invention also provides a kind of pneumatic type of implementing said method to fall the brake oil device.
Technical scheme of the present invention is as follows:
The method of brake oil is fallen, comprise the braking control system that transmits braking force by brake push rod, both sides are provided with force application apparatus before and after the piston of described brake push rod, it is characterized in that: the force application apparatus that is arranged in the force application apparatus of piston front side and/or is positioned at the piston rear side applies strength at braking procedure size changes in actv. fluctuation mode, and this actv. fluctuation mode makes the braking force of the described brake push rod transmission size of making a concerted effort change in corresponding passive fluctuation mode; Described fluctuation mode is a pulse wave, this pulse wave is based on the original constant braking force of the actv. that applies, form the trough of described pulse wave in the mode of interval release or this braking force of partial offset, this pulse wave frequency is below the 20Hz, and the trough of this pulse wave is the 25%-75% of original constant braking power.
Described actv. fluctuation mode is meant to have certain waveform and certain frequency, and corresponding passive fluctuation mode has corresponding waveform and correspondent frequency.Described certain frequency is identical with corresponding frequency.
Described certain waveform is the active pulse wave, and this active pulse wave is superimposed on original constant braking force with reverse manner, makes a concerted effort with the braking force that forms described brake push rod transmission.
Corresponding waveform is passive pulse wave, and this passive pulse wave forms the trough of described pulse wave based on the original constant braking force of the actv. that applies in the mode of interval release or this braking force of partial offset.
Corresponding frequency is 0Hz-7Hz or 9Hz-20Hz.
The trough of described pulse wave is the 40%-60% of original constant braking power.
The brake oil device falls in pneumatic type, comprise compressed air brake cylinder, this compressed air brake cylinder has compression chamber and the spring cavity that is split to form by the piston that is connected with brake push rod, described compression chamber and spring cavity all have vent, be provided with spring in the described spring cavity, it is characterized in that: described compression chamber vent is connected with gas and charges and discharge frequency control apparatus.
Described gas charges and discharge frequency control apparatus and comprises multidigit various way solenoid valve and electric-control system thereof, and described multidigit various way solenoid valve connects the control gas port of described twin-stage valve respectively by pneumatic circuit.
After the giving vent to anger of various way solenoid valve, back pressure valve is housed, comes with the first class pressure that adjusts in the middle of the twin-stage valve pressure.Described multidigit various way solenoid valve is the normal opened type two-position three way magnetic valve.
Described normal opened type two-position three way magnetic valve control twin-stage valve, twin-stage valve control relay valve, and relay valve is given the compression chamber air feed of air chamber.
Technique effect of the present invention is as follows:
Because the method for brake oil falls in the present invention, oscillation frequency by relevant brake component in the ACTIVE CONTROL brake system, promptly on the basis of original constant braking force, in braking procedure, make the braking force of the brake push rod transmission size of making a concerted effort present fluctuation and change, this just can effectively disturb friction means in the brake system because the chatter phenomena that dynamic friction and static friction produce, thereby greatly reduces brake oil.Compared with prior art, the force application apparatus that the technical program all is provided with by both sides before and after the piston that utilizes brake push rod, the force application apparatus that will be arranged in the force application apparatus of piston front side and/or be positioned at the piston rear side applies strength at braking procedure size changes in actv. fluctuation mode, this actv. fluctuation mode makes the braking force of the described brake push rod transmission size of making a concerted effort change in corresponding passive fluctuation mode, thereby can be so that brake push rod changes the function that realizes putting repeatedly braking with the fluctuation of strength.In experiment with apply to vehicle and carry out having obtained success among the embodiment that brake oil administers, proved that fully this is a kind ofly can effectively reduce even eliminate brake oil, thereby helped the method for falling brake oil of environmental protection.
Because actv. fluctuation mode is meant to have certain waveform and certain frequency, corresponding passive fluctuation mode has corresponding waveform and correspondent frequency, makes size variation that fluctuation variation that the braking force of brake push rod transmission is made a concerted effort and force application apparatus apply strength in function and then structurally have getting in touch of directly getting in touch and determine.
Because described certain frequency is in infrasonic scope; Described certain waveform is the active pulse wave, this active pulse wave is superimposed on original constant braking force with reverse manner, make a concerted effort with the braking force that forms described brake push rod transmission, thereby make passive pulse wave that braking force makes a concerted effort based on the original constant braking force of the actv. that applies, form the trough of described pulse wave in the mode of interval release or this braking force of partial offset, this has just accomplished the compatibility with prior art, not only keep existing effective braking, and can administer brake oil effectively.
Because corresponding frequency is below the 20Hz, preferred corresponding frequency is 0Hz-7Hz and 9Hz-20Hz; The trough of described pulse wave is the 25%-75% of original constant braking power; The trough of preferred described pulse wave is the 40%-60% of original constant braking power; These data all are under technical conceive of the present invention, grope to sum up to draw from experiment or test, help enforcement of the present invention.
Because the brake oil device falls in pneumatic type of the present invention, be connected with gas at the compression chamber vent and charge and discharge frequency control apparatus, this just can be according to the length of brake time, and the control air chamber charges and discharge the gas several times with certain frequency, until end of braking, charge and discharge pneumatic work and stop.
The brake oil device falls in vapour-pressure type, on function, initiatively vibration between brake wheel and the friction lining is controlled by system exactly, thereby is reduced even the elimination brake oil.By charging and discharging the control of gas frequency, can make the inflation venting repeatedly at short notice of compressed air brake cylinder compression chamber, thereby can change the instant value of braking force effectively, make braking force with certain frequency change, thereby avoided causing the chatter phenomena of screaming, thereby eliminated brake oil effectively.Therefore the present invention's noise that can reduce greatly even eliminate glancing impact fully and produced.
Because described gas charges and discharge frequency control apparatus and comprises multidigit various way solenoid valve and electric-control system thereof, be provided with the twin-stage Pneumatic valve of this relay valve pressure output of relay valve and control between described normal opened type two-position three way magnetic valve and the described compression chamber vent; This helps the enforcement of technical solution of the present invention, provides abundant facility for realizing technical conceive of the present invention and technology effect.
Because fall the concrete reflection of brake oil device structurally, following way of realization can also be arranged: fluid pressure type, electromagnetic type and other forms, other forms can be any combination of above-mentioned air pressure, electromagnetism, hydraulic pressure form.Therefore, fluid pressure type of the present invention falls the brake oil device and the brake oil device falls in electromagnetic type, all is based on same know-why, thereby realizes same technique effect.
Description of drawings
Fig. 1 is the structural principle scheme drawing of drum brake mechanism in the prior art;
Fig. 2 is the compressed air brake cylinder structural principle scheme drawing of band spring;
Fig. 3 is compressed air brake cylinder air chamber spring damped vibration figure in braking procedure shown in Figure 2;
Fig. 4 falls the spring vibration figure under the automatically controlled state in the brake oil device for pneumatic type of the present invention;
Fig. 5 falls brake oil apparatus structure principle schematic for pneumatic type of the present invention;
Reference numeral lists as follows:
The 1-brake control lever; The 2-camshaft; 3. compressed air brake cylinder; The 4-pull back spring; The 5-brake strap; The 6-brake wheel; The 201-front fork; The 202-brake push rod; The 203-seal ring; The 204-piston; The 205-spring; 206-brake off screw rod; The 207-compression chamber; The 208-spring cavity; The 501-storage tank; The 502-master brake cylinder; The 503-compressed air brake cylinder; The 504-air switch; 505-twin-stage Pneumatic valve; 506-normal opened type two-position three way magnetic valve; The 507-relay valve; The 508-electric-controlled box; 509-automobile power supply storage battery; 531-compressed air brake cylinder admission port; 532-compressed air brake cylinder compression chamber gas port; 551-twin-stage Pneumatic valve air extractor duct; 552-twin-stage Pneumatic valve admission port; 553-twin-stage Pneumatic valve control gas input port; 561-electromagnetic valve admission port; 562-electromagnetic valve air extractor duct; The 563-back pressure valve; 571-relay valve admission port; 572-relay valve control presssure input port; 573-relay valve air extractor duct i.e. first pressure output; 574-relay valve air extractor duct.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Generation about the braking principle and the brake oil of drum brake mechanism in the prior art:
As shown in Figure 1, brake push rod in the compressed air brake cylinder 3 is by acting on the brake control lever 1 push-jump camshaft 2 in the drum brake mechanism, the pulling force that makes left and right sides brake shoe brake cheek get rid of pull back spring 4 opens to both sides, friction lining is that brake strap 5 contacts with brake wheel 6, realize effectively braking, can cause friction means in the brake system simultaneously because the vibration that dynamic friction and static friction produce, thereby emit a shrill cry, promptly produce brake oil.
About the compressed air brake cylinder structural principle of band spring with fall brake oil experiment:
As shown in Figure 2, compressed air brake cylinder is an air chamber, is the operating part of automobile brake.Air chamber is divided into compression chamber and spring cavity or perhaps ante-chamber 207 and back cavity 208, and main parts size has: front fork 201, brake push rod 202, seal ring 203, piston 204, spring 205 and releasing brake screw 206.When air chamber compression chamber 207 does not have air pressure, spring 205 elongations force brake push rod 202 to stretch out, and make automobile brake; During driving, compression chamber 207 charges into gas, forces spring 205 compressions, and brake push rod 202 shrinks, and braking is removed, automobile normal running; In the service brake process, twin-stage Pneumatic valve control air chamber compression chamber 207 release portion gases make spring cavity 208 air inlets simultaneously, and brake push rod 202 stretches out, and automobile brake slows down or stops; After the end of braking, the gas in the spring cavity 208 all discharges, compression chamber 207 inflation 0.40-0.60MPa, and brake push rod 202 shrinks return, and braking is removed.
Fig. 3 shows the situation of compressed air brake cylinder shown in Figure 2 air chamber spring damped vibration in braking procedure: abscissa is braking time second, and ordinate is the braking force ox.Test is found: in the automobile brake 2 seconds, do not have brake oil, noise occurs after 2 seconds.After deliberation with by testing to such an extent that the vibration of discharge chamber inner spring progressively decays, under original constant braking force effect, brake oil produces once more.
Fig. 4 shows the situation that the spring vibration under the automatically controlled state in the brake oil device falls in pneumatic type of the present invention: this experiment is adopted and is stopped easy brake equipment, is stopping increasing electric-controlled box and electromagnetic valve on the easy brake equipment.Because the control of circuit when the spring decay closes to an end, produces vibration with the circuit controlling spring, and brake oil is obviously reduced, and has reached the requirement of administering brake oil.As can be seen from the figure, abscissa is braking time second, and ordinate is the braking force ox; Middle and later periods of braking procedure originally constant effective braking force become between 6000 Ns of 2800 wild marjorams, change with mode cycle of pulse, frequency is below 20Hz.Actual braking situation is the effect of stopping repeatedly to have occurred.
Fig. 3 and Fig. 4 are analyzed as can be known, the brake application by spring air chamber of electric-controlled box and electromagnetic valve is not installed, in second, brake system produces some braking fast, does not have brake oil at the 1.5-2 of brake beginning; But along with the decay of vibration, it is constant that braking force progressively is tending towards, and is 1.5-2 after second in the braking time in residue, can occur brake squeal once more.Owing to taked to install additional the way of electromagnetic valve and control capsule, make the air chamber compression chamber charge and discharge pressure gas, force spring when vibration damping closes to an end, to make brake system produce vibration once more, thereby eliminated the generation once more of brake oil.
Fig. 5 shows pneumatic type of the present invention and falls brake oil apparatus structure principle: this falls the brake oil device, mainly is made up of compressed air brake cylinder 503, five valve modules 505 and electric-controlled box 508 etc.; Adopted the compactly designed of five valve modules, this five valve module is meant the member that twin-stage Pneumatic valve 505, normal opened type two-position three way magnetic valve 506 and relay valve 507 combination back pressure valves and switch valve form.Respectively parts such as the electric-controlled box in five valve modules and the electrical controller 508 are described below: 1. twin-stage Pneumatic valve, it is an important composition element that falls in the brake oil device, its effect is: the twin-stage Pneumatic valve keeps energy storage spring brake chamber's (abbreviation air chamber) to be in the constant pressure of 0.40-0.60MPa all the time during cruising, this pressure reclaims the air chamber push rod fully, and the freeing vehicle braking also keeps non-braking mode; During brake, the twin-stage Pneumatic valve makes the compression chamber release portion gas of air chamber, makes push rod stretch out and plays braking action; After finishing braking, the twin-stage Pneumatic valve all discharges the interior gas of spring cavity of air chamber, the compression chamber of air chamber inflation simultaneously, and compression chamber reaches the constant pressure of 0.40-0.60MPa again, and the air chamber push rod shrinks return, the braking releasing.2. electromagnetic valve, the cavity of resorption pressure gas that is used to control the twin-stage Pneumatic valve charges and discharge, and controls the air chamber braking and removes braking by the twin-stage valve.During brake, give the inflation of twin-stage Pneumatic valve when electromagnetic valve, the compression chamber of air chamber is exitted, and push rod stretches out and plays braking action; Give the venting of twin-stage Pneumatic valve when electromagnetic valve, the compression chamber of air chamber is inflated, and the air chamber push rod shrinks return and plays the brake off effect.In brake process, according to the length of brake time, electromagnetic valve is by twin-stage Pneumatic valve and relay valve, and the control air chamber charges and discharge the gas several times with certain frequency, charges and discharge pneumatic work then and stops.3. relay valve is the execution valve of electromagnetic valve and twin-stage Pneumatic valve control presssure, and its effect is: charge into the compression chamber of air chamber after the control presssure amplification with the output of twin-stage Pneumatic valve, when brake, make the air chamber compression chamber charge and discharge gas fast by relay valve.4. back pressure valve is exactly the control air pressure that the master cock valve is switched to the twin-stage valve.Reduce the amplitude of inflation discharge quantity and vibration, improve the insensitivity of car load.5. switch valve is exactly when brake, is switched to the power supply in the electric-controlled box.6. electric-controlled box, the control electricity of control electromagnetic valve work, power supply comes from switch valve.During cruising and when stopping, electric-controlled box does not have electricity not work.Only when brake, because electric-controlled box powers up and starts working, the electric-controlled box control electromagnetic valve time-delay regular hour, control electromagnetic valve is with certain frequency vibration then, this certain frequency is 2-4Hz, thereby drives twin-stage Pneumatic valve, relay valve and air chamber work, plays the effect that quick point is stopped.7. compressed air brake cylinder is an air chamber, is the operating part of automobile brake, and the front is narrated.8. pipe fitting is used to connect valve body and air chamber, adopts standard components such as flexible pipe, nylon tube, iron pipe, copper pipe and various adaptor unions.9. storage tank is used to store the pressure container that high pressure gas use in order to glancing impact.For guaranteeing tolerance, can brake the storage tank that rises with 20-40 of the other appropriate location series connection of brake air storage tank at former propons, can solve the problem of brake pressure deficiency like this.
As shown in Figure 5, master brake cylinder 502 links to each other with the admission port 561 of normal opened type two-position three way magnetic valve 506, the air extractor duct 562 of normal opened type two-position three way magnetic valve 506 links to each other with the control gas input port 553 of twin-stage Pneumatic valve 505, the admission port 552 of twin-stage Pneumatic valve 505 links to each other with storage tank 501 with the admission port 571 of relay valve 507, the air extractor duct 573 of relay valve 507 links to each other with the compression chamber gas port 532 of compressed air brake cylinder 503, the air extractor duct 574 of relay valve 507 links to each other with the compression chamber gas port 532 of another compressed air brake cylinder, electric-controlled box 508 links to each other with switch valve 504, and normal opened type two-position three way magnetic valve 506 is controlled by electric-controlled box 508.Glancing impact, step on master brake cylinder 502, switch valve 504 is at the power connection of the following electric-controlled box 508 of high pressure gas effect, high pressure gas enter the compressed air brake cylinder spring cavity from storage tank 501 by compressed air brake cylinder 503 admission ports 531 simultaneously, the compression chamber gas port 532 of compressed air brake cylinder 503 is by relay valve 507 exhausts immediately, at the time expand t that sets after second, electric-controlled box 508 control normal opened type two-position three way magnetic valves 506 are closed t1 second, promptly be equivalent to the compression chamber of compressed air brake cylinder 503 is carried out exhaust t1 second, after the exhaust since two-position three way magnetic valve 506 are normal opens, air inlet t2 second again, therefore normal opened type electromagnetic valve 506 charges and discharge gas repeatedly with certain frequency and decontrols end of braking up to master brake cylinder 502 under the control of electric-controlled box 508.Normal opened type two-position three way magnetic valve 506 can guarantee that vehicle also has normal brake application when the Circuits System et out of order, has been noise reduction sound miopragia, has guaranteed the safety of vehicle.
Because compressed air brake cylinder 503, electric-controlled box 508, normal opened type two-position three way magnetic valve 506, relay valve 507, twin-stage Pneumatic valve 505, switch valve 504 etc. connect, two-position three way magnetic valve 506 by electric-controlled box 508 control normal opened types, thereby control relay valve 507, ante-chamber to compressed air brake cylinder 503 charges and discharge the control of gas with certain frequency, prevents brake oil thereby reach.Two-position three way magnetic valve 506 is normal opened types, and its outlet 562 links to each other with the control presssure input port 553 of twin-stage Pneumatic valve 505, the air extractor duct 551 of twin-stage Pneumatic valve 505 links to each other with the control presssure input port 572 of relay valve 507, thereby the pressure output 573 and 574 of relay valve 507 is controlled.Obviously, automobile power supply storage battery 509 is responsible for the power supply supply of power consumption components and parts.
Should be pointed out that above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification sheets has been described in detail the present invention with reference to each above-mentioned embodiment,, it will be appreciated by those skilled in the art that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of spirit of the present invention, all fall in the middle of protection scope of the present invention.
Claims (4)
1. the method for brake oil is fallen, comprise the braking control system that transmits braking force by brake push rod, both sides are provided with force application apparatus before and after the piston of described brake push rod, it is characterized in that: the force application apparatus that is arranged in the force application apparatus of piston front side and/or is positioned at the piston rear side applies strength at braking procedure size changes in actv. fluctuation mode, and this actv. fluctuation mode makes the braking force of the described brake push rod transmission size of making a concerted effort change in corresponding passive fluctuation mode; Described fluctuation mode is a pulse wave, this pulse wave is based on the original constant braking force of the actv. that applies, form the trough of described pulse wave in the mode of interval release or this braking force of partial offset, this pulse wave frequency is below the 20Hz, and the trough of this pulse wave is the 25%-75% of original constant braking power.
2. method of falling brake oil according to claim 1 is characterized in that: corresponding frequency is 0Hz-7Hz or 9Hz-20Hz.
3. method of falling brake oil according to claim 1 is characterized in that: the trough of described pulse wave is the 40%-60% of original constant braking power.
4. the brake oil device falls in pneumatic type, comprise compressed air brake cylinder, this compressed air brake cylinder has ante-chamber and the back cavity that is split to form by the piston that is connected with brake push rod, described ante-chamber and back cavity all have vent, be provided with spring in the described back cavity, it is characterized in that: described ante-chamber vent is connected with gas and charges and discharge frequency control apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100115025A CN1326729C (en) | 2005-03-30 | 2005-03-30 | Method for reducing brake noise and air pressure brake noise reducer for implementing the method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100115025A CN1326729C (en) | 2005-03-30 | 2005-03-30 | Method for reducing brake noise and air pressure brake noise reducer for implementing the method |
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| Publication Number | Publication Date |
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| CN1663859A CN1663859A (en) | 2005-09-07 |
| CN1326729C true CN1326729C (en) | 2007-07-18 |
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| CNB2005100115025A Expired - Fee Related CN1326729C (en) | 2005-03-30 | 2005-03-30 | Method for reducing brake noise and air pressure brake noise reducer for implementing the method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986135A (en) * | 2015-08-06 | 2015-10-21 | 陈凡 | Method for suppressing brake noise of vehicle |
| CN106197919B (en) * | 2016-07-05 | 2017-08-25 | 同济大学 | A kind of friction judged based on stick-slip and self-locking vibration is screamed suppressing method |
| US10315638B2 (en) | 2016-07-07 | 2019-06-11 | Robert Lambertus Dekam | Air braking system |
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| CN1560486A (en) * | 2004-03-12 | 2005-01-05 | 哈尔滨工业大学 | A low-noise automobile disc brake pad |
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2005
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Patent Citations (5)
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|---|---|---|---|---|
| CN1072336C (en) * | 1994-10-28 | 2001-10-03 | 日野自动车工业株式会社 | Disk brake |
| KR20020014301A (en) * | 2000-08-17 | 2002-02-25 | 이계안 | squeal noise reduction device for automotive vehicle brake and reducing method thereof |
| CN2584472Y (en) * | 2002-11-19 | 2003-11-05 | 刘冬生 | Brake device for vehicle speed reducing |
| CN2630064Y (en) * | 2003-07-10 | 2004-08-04 | 浙江亚太机电股份有限公司 | Low-noise brake assembly |
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Non-Patent Citations (4)
| Title |
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| Electronic controlcanceling system for a drake noise Nishizawa Y.Saka H,Ssciety of Automotive Engineers 1997 * |
| Electronic controlcanceling system for a drake noise Nishizawa Y.Saka H,Ssciety of Automotive Engineers 1997;Experimental active control of automotive disc brake rotsqueal using dither K A and Graf A J,Journal of Sound and Vibration,Vol.250 No.4 2002;停易制动系统及其双级气控继动阀的开发与应用 蔡健敏，顾寄南，王庭义，液压与气动，第6期 2004 * |
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