CN101574968B - Controllable vacuum booster - Google Patents
Controllable vacuum booster Download PDFInfo
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- CN101574968B CN101574968B CN 200810062331 CN200810062331A CN101574968B CN 101574968 B CN101574968 B CN 101574968B CN 200810062331 CN200810062331 CN 200810062331 CN 200810062331 A CN200810062331 A CN 200810062331A CN 101574968 B CN101574968 B CN 101574968B
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- electromagnetic valve
- vacuum booster
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Abstract
The invention relates to a controllable vacuum booster which is provided with a booster body (1), and the booster body (1) comprises a front cavity (2), a back cavity (3) and a mounting bolt (7) positioned on a shell of the back cavity, wherein the front cavity is internally provided with a braking master cylinder piston (4); a booster membrane (5) is arranged between the front cavity (2) and the back cavity (3); and the braking master cylinder piston (4) positioned in the front cavity is provided with a tappet rod (6). The controllable vacuum booster is characterized in that the mounting bolt(7) is connected with an air inlet electromagnetic valve (9) of the back cavity; and the tappet rod (6) is movably connected with an air inlet electromagnetic valve (8) of the front cavity. The contr ollable vacuum booster not only maintains a manual foot stepping brake mode so as to meet the requirement on normal brake operation of a driver, but also can automatically energize to carry out the brake operation under the conditions of tire burst, collision, or the like through the electromagnetic valve of the front cavity and the electromagnetic valve of the back cavity so as to reduce the traffic accident rate and improve the safety. The controllable vacuum booster has simple structure, low cost and convenient mounting process.
Description
Technical field
The present invention relates to a kind of Pneumatic component vacuum booster of automobile, is a kind of controllable vacuum booster specifically.
Background technology
Automobile is one of vehicle of running at high speed, human brain is difficult to external world accident such as blowing out under many circumstances, the situations such as collision are made a response, such as the time weak point of blowing out, generally all in 100ms, therefore just more can not rely on navigating mate in case of emergency one to make surely accurate operation, the passenger lease of life is transient, therefore, need to control braking by vacuum booster automatically, vacuum booster is the Pneumatic component of automobile, in general, vacuum booster has four kinds of service conditions, when not braking, during braking, keep braking and loosen the brake, vacuum booster is fixed on the vehicle body, borrow push rod to be connected with brake pedal, rely on foot pedal to realize its function.
People are in order to address the above problem, a lot of improvement have been made, such as the disclosed a kind of electric control vacuum booster (publication number: CN 200967472) that is named as of Chinese patent, it is in the ante-chamber the inside two connection pipes to be set, utilize connection pipe to connect and arrange and this external electromagnetic valve of servo-unit, because two connection pipes are arranged on the ante-chamber the inside, so relatively take front cavity space, and when the servo-unit diaphragm moves toward ante-chamber, pipe can be squeezed, and causes air-flow not smooth, can produce interference, and pipe itself often is extruded like this, and service life is short; And complex process, original servo-unit performance is produced large impact, can affect the normal running of servo-unit.
Summary of the invention
The invention solves vacuum booster that prior art exists can only manual problem, and a kind of controllable vacuum booster that can autobrake under bursty state is provided;
The present invention has also solved the electric control vacuum booster weak point in service life that prior art exists, the problem of complex process, provides a kind of long service life and technique simple controllable vacuum booster.
Above-mentioned technical purpose of the present invention mainly solves by the following technical programs: a kind of controllable vacuum booster, one servo-unit body is arranged, it comprises ante-chamber, back cavity and is positioned at hold-down bolt on the rear cavity shell, in this chamber, be provided with brake master cylinder piston, be provided with the servo-unit diaphragm between ante-chamber and the back cavity, the brake master cylinder piston that is positioned at ante-chamber is provided with tappet, it is characterized in that described hold-down bolt connects the back cavity air inlet electromagnetic valve, is flexibly connected the ante-chamber air inlet electromagnetic valve on the described tappet.This controllable vacuum booster generally speaking, all adopts artificial pedal brake pattern, satisfies the needs of navigating mate normal brake application operation, and when blow out or collision etc. in emergency circumstances, just adopt the automatic controlled emergency braking of electromagnetic valve; When the needs automatic emergency brake, main frame sends executive signal, the energising of front/back cavity air inlet electromagnetic valve, electromagnet in the ante-chamber produces magnetic force, and the elastic force that overcomes pull back spring is adsorbed on the surface of tappet base, blocks simultaneously the base holes on the tappet base, thereby sealed the gas channel between the vacuum booster front/back cavity, front/back cavity separates, and ante-chamber is connected with the engine charge aditus laryngis, keeps certain degree of vacuum; Simultaneously, after the back cavity air inlet electromagnetic valve energising, the pull back spring that the back cavity valve core of the electromagnetic valve is installed in the bottom is held and is attracted, and the back cavity spool separates with sealing surface between the back cavity valve body, and air enters back cavity by side through hole and bolt hole; At this moment, front/back cavity forms certain pressure reduction, and the servo-unit diaphragm moves and promote the brake master cylinder piston motion toward ante-chamber under the effect of pressure reduction, and the generation braking force realizes that automobile brake slows down, and has reduced traffic accident rate, has improved safety; After current, back cavity air inlet electromagnetic valve cut off the power supply, front/back cavity did not have pressure reduction, and the servo-unit diaphragm can set back under the effect of diaphragm return spring.And add two electromagnetic valves on this vacuum servo-unit, and do not need to increase other structure or original manually operated servo-unit is made large change, thus simple in structure, and also mounting process is convenient, does not also affect the performance of original vacuum booster.
As preferably, described back cavity air inlet electromagnetic valve comprises back cavity valve body and the back cavity spool that is connected with the back cavity valve body, this back cavity spool other end connection back cavity pull back spring, and described back cavity valve body one end and both sides are respectively equipped with holds through hole and side through hole.End through hole and side through hole on the back cavity valve body are interconnected, and the end through hole is used for the connection bolt, and after connecting, an end of hold-down bolt and an end in contact of spool form sealing surface, and spool blocks side through hole; Like this when the back cavity air inlet electromagnetic valve is not switched on, just block side through hole, prevent that back cavity from communicating by bolt hole and atmosphere, after the energising of back cavity air inlet electromagnetic valve, valve core of the electromagnetic valve is installed in the pull back spring of bottom and holds attraction, the back cavity spool separates with sealing surface between the back cavity valve body, and air enters back cavity by side through hole and bolt hole.
As preferably, described hold-down bolt is provided with bolt hole.Regular bolt hole is exactly a chamber of getting at the center of hold-down bolt, is used for connecting the back cavity air inlet electromagnetic valve.
As preferably, the end through hole on described hold-down bolt and the back cavity valve body is adaptive.With the passage that forms and atmosphere communicates.
As preferably, described ante-chamber air inlet electromagnetic valve comprises ante-chamber electromagnet and connected ante-chamber pull back spring, is provided with central through hole in the middle of this ante-chamber electromagnet.This ante-chamber pull back spring is to adsorb the ante-chamber electromagnet whether blocking base holes, and this central through hole is used for connecting tappet.
As preferably, the tappet base that described tappet comprises tappet body and is connected as a single entity with it, this in tappet base week side be provided with some base holes.Tappet body is used for connecting the ante-chamber air inlet electromagnetic valve, and an end of tappet base connects the junction of ante-chamber and back cavity, and the base holes on it and the gas channel between the front/back cavity are communicated with.
As preferably, it is adaptive with it that described tappet body passes central through hole, and the other end backstop of described ante-chamber pull back spring is lived the tappet base.Main frame sends executive signal when the needs automatic emergency brake, the energising of front/back cavity air inlet electromagnetic valve, electromagnet in the ante-chamber produces magnetic force, the elastic force that overcomes pull back spring is adsorbed on the surface of tappet base, block simultaneously the base holes on the tappet base, thereby sealed the gas channel between the vacuum booster front/back cavity, front/back cavity separates, ante-chamber is connected with the engine charge aditus laryngis, keeps certain degree of vacuum; If do not give the energising of front/back cavity air inlet electromagnetic valve, because the effect of pull back spring elastic force, ante-chamber air inlet electromagnetic valve and tappet base have a distance, can not block base holes, so just do not seal the gas channel between the front/back cavity, so that the pressure reduction between the front/back cavity is the same, the servo-unit diaphragm can not move and promote the brake master cylinder piston motion and the generation braking force.
The present invention is skillfully constructed, and by adding the ante-chamber air inlet electromagnetic valve at tappet and adding the back cavity air inlet electromagnetic valve at hold-down bolt, makes it have compared with the prior art following beneficial effect:
1, adopts artificial pedal brake pattern, satisfy the needs of navigating mate normal brake application operation;
2, the front/back cavity air inlet electromagnetic valve utilizes pressure reduction to realize the movement of servo-unit diaphragm is promoted brake master cylinder piston generation braking force, and good braking effect has reduced traffic accident rate, has improved safety;
3, mounting process is simple, can not produce large impact, long service life to original vacuum booster performance.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention:
Fig. 2 is the structural representation of ante-chamber air inlet electromagnetic valve;
Fig. 3 is the structural representation of back cavity air inlet electromagnetic valve;
Fig. 4 is the structural representation of tappet.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described further.
Embodiment 1.See Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, this routine a kind of controllable vacuum booster, one servo-unit body 1 is arranged, it comprises ante-chamber 2, back cavity 3 and is positioned at hold-down bolt 7 on the rear cavity shell, in this chamber, be provided with brake master cylinder piston 4, be provided with servo-unit diaphragm 5 between ante-chamber 2 and the back cavity 3, be connected with diaphragm return spring 13 between this servo-unit diaphragm 5 and ante-chamber 2 one ends, the brake master cylinder piston 4 that is positioned at ante-chamber is provided with tappet 6, described hold-down bolt 7 connects back cavity air inlet electromagnetic valve 9, is flexibly connected ante-chamber air inlet electromagnetic valve 8 on the described tappet 6.Back cavity connects push rod 12 by input bar 11, the pedal when this push rod 12 is connecting artificial braking.
As shown in Figure 4, described back cavity air inlet electromagnetic valve 9 comprises back cavity valve body 91 and the back cavity spool 92 that is connected with the back cavity valve body, these back cavity spool 92 other ends connect back cavity pull back spring 93, the outside of back cavity spool 92 and pull back spring 93 is provided with back cavity coil 96, described back cavity valve body 91 1 ends and both sides are respectively equipped with end through hole 94 and side through hole 95, and end through hole 94 and side through hole 95 are connected.
As shown in Figure 1, hold-down bolt 7 is provided with bolt hole 10, it is adaptive with it that the other end of hold-down bolt 7 extend into end through hole 94 the insides of back cavity valve body 91, this bolt hole 10 is whether the sealing surface 91 of back cavity spool 92 and back cavity valve bodies separates, and realizes whether air enters back cavity by side through hole 95 and bolt hole 10.
As shown in Figure 2, described ante-chamber air inlet electromagnetic valve 8 comprises ante-chamber electromagnet 81 and connected ante-chamber pull back spring 82, is provided with central through hole 83 in the middle of this ante-chamber electromagnet 81; As shown in Figure 4, the tappet base 62 that described tappet 6 comprises tappet body 61 and is connected as a single entity with it, these tappet base 62 all sides are provided with some base holes 63.And it is adaptive with it that described tappet body 61 passes central through hole 83, and described ante-chamber pull back spring 82 other end backstops are lived tappet base 62.
The operation of this controllable vacuum booster is as follows:
Generally speaking, all adopt artificial pedal brake pattern, satisfy the needs of navigating mate normal brake application operation, and when blow out or collision etc. in emergency circumstances, just adopt the automatic controlled emergency braking of electromagnetic valve.
When the needs automatic emergency brake, main frame sends executive signal, the energising of front/back cavity air inlet electromagnetic valve, electromagnet in the ante-chamber produces magnetic force, and the elastic force that overcomes pull back spring is adsorbed on the surface of tappet base, blocks simultaneously the base holes on the tappet base, thereby sealed the gas channel between the vacuum booster front/back cavity, front/back cavity separates, and ante-chamber is connected with the engine charge aditus laryngis, keeps certain degree of vacuum; Simultaneously, after the back cavity air inlet electromagnetic valve energising, the pull back spring that the back cavity valve core of the electromagnetic valve is installed in the bottom is held and is attracted, and the back cavity spool separates with sealing surface between the back cavity valve body, and air enters back cavity by side through hole and bolt hole; At this moment, front/back cavity forms certain pressure reduction, and servo-unit diaphragm past ante-chamber under the effect of pressure reduction moves and promotes brake master cylinder piston to be transported to, and produces braking force, realizes that automobile brake slows down, and has reduced traffic accident rate, has improved safety; After current, back cavity air inlet electromagnetic valve cut off the power supply, front/back cavity did not have pressure reduction, and the servo-unit diaphragm can set back under the effect of diaphragm return spring.
It is apparent to one skilled in the art that the present invention can change into various ways, and such change is not thought and departed from the scope of the present invention.What all were such will be included within the scope of this claim the apparent modification of described those skilled in the art.
Claims (6)
1. controllable vacuum booster, one servo-unit body (1) is arranged, it comprises ante-chamber (2), back cavity (3) and be positioned at hold-down bolt (7) on the rear cavity shell, in this chamber, be provided with brake master cylinder piston (4), be provided with servo-unit diaphragm (5) between ante-chamber (2) and the back cavity (3), the brake master cylinder piston (4) that is positioned at ante-chamber is provided with tappet (6), it is characterized in that described hold-down bolt (7) connects back cavity air inlet electromagnetic valve (9), the upper ante-chamber air inlet electromagnetic valve (8) that is flexibly connected of described tappet (6), the tappet base (62) that described tappet (6) comprises tappet body (61) and is connected as a single entity with it, all sides of this tappet base (62) are provided with some base holes (63).
2. a kind of controllable vacuum booster according to claim 1, it is characterized in that described back cavity air inlet electromagnetic valve (9) comprises back cavity valve body (91) and the back cavity spool (92) that is connected with the back cavity valve body, this back cavity spool (92) other end connects back cavity pull back spring (93), and described back cavity valve body (91) one ends and both sides are respectively equipped with end through hole (94) and side through hole (95).
3. a kind of controllable vacuum booster according to claim 1 is characterized in that described hold-down bolt (7) is provided with bolt hole (10).
4. a kind of controllable vacuum booster according to claim 2 is characterized in that the end through hole (94) on described hold-down bolt (7) and the back cavity valve body (91) is adaptive.
5. a kind of controllable vacuum booster according to claim 1, it is characterized in that described ante-chamber air inlet electromagnetic valve (8) comprises ante-chamber electromagnet (81) and connected ante-chamber pull back spring (82), be provided with central through hole (83) in the middle of this ante-chamber electromagnet (81).
6. a kind of controllable vacuum booster according to claim 5, it is adaptive with it to it is characterized in that described tappet body (61) passes central through hole (83), and the other end backstop of described ante-chamber pull back spring (82) is lived tappet base (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810062331 CN101574968B (en) | 2008-05-09 | 2008-05-09 | Controllable vacuum booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810062331 CN101574968B (en) | 2008-05-09 | 2008-05-09 | Controllable vacuum booster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101574968A CN101574968A (en) | 2009-11-11 |
| CN101574968B true CN101574968B (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810062331 Expired - Fee Related CN101574968B (en) | 2008-05-09 | 2008-05-09 | Controllable vacuum booster |
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| Country | Link |
|---|---|
| CN (1) | CN101574968B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29811353U1 (en) * | 1998-06-25 | 1998-09-24 | Lucas Automotive GmbH, 56070 Koblenz | Vacuum brake booster |
| US5845558A (en) * | 1995-07-13 | 1998-12-08 | Aisin Seiki Kabushiki Kaisha | Vacuum servo unit for a vehicle braking system |
| CN1914078A (en) * | 2004-02-02 | 2007-02-14 | 卢卡斯汽车股份有限公司 | Braking force generator for a hydraulic vehicle braking system |
| CN101161522A (en) * | 2006-10-11 | 2008-04-16 | 桂林思超汽车科技有限公司 | Electric control vacuum booster and controlling method |
| CN201208959Y (en) * | 2008-05-09 | 2009-03-18 | 浙江吉利汽车研究院有限公司 | Controllable vacuum booster |
-
2008
- 2008-05-09 CN CN 200810062331 patent/CN101574968B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5845558A (en) * | 1995-07-13 | 1998-12-08 | Aisin Seiki Kabushiki Kaisha | Vacuum servo unit for a vehicle braking system |
| DE29811353U1 (en) * | 1998-06-25 | 1998-09-24 | Lucas Automotive GmbH, 56070 Koblenz | Vacuum brake booster |
| CN1914078A (en) * | 2004-02-02 | 2007-02-14 | 卢卡斯汽车股份有限公司 | Braking force generator for a hydraulic vehicle braking system |
| CN101161522A (en) * | 2006-10-11 | 2008-04-16 | 桂林思超汽车科技有限公司 | Electric control vacuum booster and controlling method |
| CN201208959Y (en) * | 2008-05-09 | 2009-03-18 | 浙江吉利汽车研究院有限公司 | Controllable vacuum booster |
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| Publication number | Publication date |
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| CN101574968A (en) | 2009-11-11 |
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Granted publication date: 20130220 Termination date: 20200509 |