CN103693033A - Vacuum boosting system, electric vehicle and vacuum boosting control method - Google Patents
Vacuum boosting system, electric vehicle and vacuum boosting control method Download PDFInfo
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- CN103693033A CN103693033A CN201210369313.5A CN201210369313A CN103693033A CN 103693033 A CN103693033 A CN 103693033A CN 201210369313 A CN201210369313 A CN 201210369313A CN 103693033 A CN103693033 A CN 103693033A
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Abstract
The invention disclose a vacuum boosting system, which comprises a vacuum booster (1), a vacuum degree sensor (2), an electric vacuum pump (3), a control unit (4) and a vacuum tank (10), wherein the vacuum degree sensor (2) is arranged on the vacuum booster (1), and is used for acquiring the vacuum degree in the vacuum booster (1); the control unit (4) is electrically connected with the vacuum degree sensor (2) and the electric vacuum pump (3) respectively; the electric vacuum pump (3) is connected with the vacuum booster (1) and the vacuum tank (1) through pipelines respectively; the vacuum tank (10) is communicated with the vacuum booster (1). Moreover, the invention further provides an electric vehicle comprising the vacuum boosting system, and a corresponding vacuum boosting control method. By adopting the vacuum boosting system, the electric vacuum pump can be prevented from being started frequently, and the service life of the electrically-controlled vacuum pump is prolonged remarkably.
Description
Technical field
The present invention relates to automobile brake field, particularly, relate to a kind of vacuum boost system.In addition, the invention still further relates to a kind of elec. vehicle that comprises above-mentioned vacuum boost system.Further, the invention still further relates to a kind of vacuum servo control method.
Background technology
Adopt the elec. vehicle of hydraulic braking, the pressure that generally all adopts vacuum booster to improve pipeline in hydraulic brake system obtains required braking force thus.Vacuum booster needs vacuum as energy source, the gas when vacuum pump in vacuum boost system is worked thus in aspiration vacuum servo-unit, thus the vacuum keep of the vacuum of using in brake system is guaranteed within safe range to the traffic safety of vehicle with this.When degree of vacuum is during lower than the lower limit of safe range, the effect of vacuum booster will obviously reduce, and travel and cause potential safety hazard to car load.
For fuel engines, oil-sealed rotary pump is connected with dynamo belt, and during engine running, driving mechanical vacuum pump rotates thus, thereby oil-sealed rotary pump constantly ceaselessly extracts the gas in brake system, with this, can make brake system have all the time the vacuum of needed degree of vacuum.
But the battery power consumption of using on elec. vehicle is at present lower, if the such moment extracting vacuum ceaselessly of the oil-sealed rotary pump that the electric vacuum pump on elec. vehicle connects as fuel engines can cause unnecessary energy dissipation.
In addition, conventionally the safe range of brake system requirement degree of vacuum is 50bar～80bar, often carry out thus once safety braking (touching on the brake), Motorized vacuum pump work once, if Motorized vacuum air pump inoperative now, degree of vacuum after safety arrestment so for the second time in vacuum booster can quickly fall to the lower limit of safe range, and the safety that elec. vehicle travels thus reduces greatly.In addition, in view of elec. vehicle is applied to city traffic and environmental sanitation more, braking number of times is comparatively frequent, and electric vacuum pump is understood frequent starting thus, and obviously reduce the service life of electric vacuum pump.Especially, when elec. vehicle is braked on the road of continuous lower long slope, electric vacuum pump can be worked always, causes electric vacuum pump excess Temperature, thereby has a strong impact on its service life.So the application of this control method is limited greatly.Further, because the vacuum that the every work of vacuum booster of great tonnage hydraulic braking vehicle once consumes is more, this control method also cannot meet the requirement of great tonnage hydraulic braking vehicle.Therefore this control method is only applied in the lighter N1 of load-carrying or M1 class vehicle.
Summary of the invention
A technical matters to be solved by this invention is to provide a kind of vacuum boost system, and this vacuum boost system can be avoided frequent starting electric vacuum pump, significantly improves the service life of electric controlled vacuum pump.
In addition, another technical matters to be solved by this invention is to provide a kind of electronlmobil, and the vacuum boost system that this electronlmobil comprises can be avoided frequent starting electric vacuum pump, significantly improves the service life of electric controlled vacuum pump.
Further, another technical matters to be solved by this invention is to provide a kind of vacuum servo control method, and this vacuum servo control method can be avoided frequent starting electric vacuum pump, significantly improves the service life of electric controlled vacuum pump.
To achieve these goals, the invention provides a kind of vacuum boost system, comprise vacuum booster, wherein, this vacuum boost system also comprises vacuum sensor, electric vacuum pump, control unit and vacuum reservoir, described vacuum sensor is arranged on described vacuum booster to gather the degree of vacuum in this vacuum booster, described control unit is electrically connected to described vacuum sensor and electric vacuum pump respectively, described electric vacuum pump is connected with vacuum reservoir with described vacuum booster respectively by pipeline, and described vacuum reservoir is connected with described vacuum booster.
Preferably, described pipeline comprises the first pipeline, the second pipeline, the 3rd pipeline and T-pipe joint, the first interface of this T-pipe joint is connected with described vacuum reservoir by described the first pipeline, the second interface is connected with described vacuum booster by described the second pipeline, and the 3rd interface is connected with described electric vacuum pump by described the 3rd pipeline.
Preferably, on described the 3rd pipeline, be provided with check valve, the forward port of this check valve is communicated with described T-pipe joint.
In addition, on the basis of technique scheme, the present invention also provides a kind of electronlmobil, and wherein, this electronlmobil comprises the vacuum boost system described in technique scheme.
In addition, the present invention also provides a kind of vacuum servo control method, wherein, comprises the steps:
First, detect the degree of vacuum in vacuum booster, when the low vacuum of this detection is during in predetermined lower bound value, control Motorized vacuum pump work with the gas in the vacuum reservoir that extracts described vacuum booster and be connected with this vacuum booster, and detect in real time the degree of vacuum in described vacuum booster in described electric vacuum pump working process;
The second, when the degree of vacuum in described vacuum booster equals predetermined upper limit value, control described electric vacuum pump and quit work.
Preferably, in described first step, by the vacuum sensor being arranged on described vacuum booster, detect degree of vacuum.
Preferably, by control unit, receive the degree of vacuum signal that described vacuum sensor detects, this control unit is according to electric vacuum pump described in this degree of vacuum signal control.
Analysis by above technical scheme can be found out, vacuum boost system provided by the invention is because vacuum booster is communicated with vacuum reservoir, thus electric vacuum pump can aspiration vacuum servo-unit and vacuum reservoir in gas, thereby for hydraulic brake system provides a large amount of vacuum in safe range, avoid frequent starting electric vacuum pump, significantly improve the service life of electric controlled vacuum pump, thereby be beneficial to the driving safety of elec. vehicle.In addition, owing to having avoided frequent starting, thereby effectively saved the energy.Further, because vacuum boost system can provide a large amount of vacuum in safe range for hydraulic brake system, so vacuum boost system provided by the invention and corresponding vacuum servo control method can be applied on large-tonnage elec. vehicle.
Other features and advantages of the present invention partly in detail are described the specific embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with the specific embodiment one below.In the accompanying drawings:
Fig. 1 is the Motorized vacuum pump control system according to the preferred embodiment of the present invention.
Description of reference numerals
1 vacuum booster 2 vacuum sensors
3 electric vacuum pump 4 control units
5 signal wire (SW) 6 second pipelines
7 the 3rd pipeline 8 first pipelines
9 T-pipe joint 10 vacuum reservoirs
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Vacuum boost system provided by the invention, as shown in Figure 1, comprises vacuum booster 1, also comprises vacuum sensor 2, electric vacuum pump 3, control unit 4 and vacuum reservoir 10.Vacuum sensor 2 is arranged on vacuum booster 1, vacuum booster 1 is in order to gather the degree of vacuum in vacuum booster 1, control unit 4 is electrically connected to vacuum sensor 2 and electric vacuum pump 3 respectively, electric vacuum pump 3 is connected with vacuum reservoir 10 with vacuum booster 1 respectively by pipeline, and vacuum reservoir 10 is connected with vacuum booster 1.For example, as shown in Figure 1, control unit 4 adopts signal wire (SW) 5 to realize with being electrically connected to of vacuum sensor 2 and electric vacuum pump 3 respectively, and whether the degree of vacuum signal deciding that control unit 4 transmits according to vacuum sensor 2 thus starts electric vacuum pump 3.The low vacuum transmitting when vacuum sensor 2 is during in predetermined lower bound value, and control unit 4 drives electric vacuum pumps 3 work, and electric vacuum pump 3 is the gas in aspiration vacuum servo-unit 1 and vacuum reservoir 10 thus.Because vacuum booster 1 is connected with vacuum reservoir 10, so the degree of vacuum in vacuum booster 1 is equal to the degree of vacuum in vacuum reservoir 10.When control unit 4 detects degree of vacuum in vacuum booster 1 and equals predetermined upper limit value, electric vacuum pump 3 quits work.In vacuum booster 1 and vacuum reservoir 10, form the vacuum of a large amount of degree of vacuum in safe range thus.With this, meet the demand of hydraulic braking.
It should be noted that, the present invention is not limited to vacuum sensor, in the use of this vacuum sensor for detection of the degree of vacuum in vacuum booster, according to those skilled in the art's general knowledge, also can adopt gas pressure sensor etc. to detect corresponding gas pressure value in vacuum booster.In addition, the present invention is also not limited to vacuum reservoir, and any leakproof tank is alternative vacuum reservoir all, as long as can meet sealed vacuum, prevents that gas from entering.
As preferred embodiment, as shown in Figure 1, vacuum booster 1, control unit 4, electric vacuum pump 3 and vacuum reservoir 10 interconnect by the first pipeline 8, the second pipeline 6, the 3rd pipeline 7 and T-pipe joint 9.Particularly, the first interface of this T-pipe joint 9 is connected with vacuum reservoir 10 by the first pipeline 8, the second interface of T-pipe joint 9 is connected with vacuum booster 1 by the second pipeline 6, and the 3rd interface of this T-pipe joint 9 is connected with electric vacuum pump 3 by the 3rd pipeline 7, realize being thus connected of the connection of vacuum booster 1 and vacuum reservoir 10 and electric vacuum pump 3 and vacuum booster 1 and vacuum reservoir 10.
Preferably, on the 3rd pipeline 7 that electric vacuum pump 3 is connected with T-pipe joint 9, be provided with check valve, the forward port of this check valve is communicated with T-pipe joint 9, the one end that makes thus the gas in the 3rd pipeline 7 be merely able to from being connected with T-pipe joint 9 flows to the one end being connected with electric vacuum pump 3, thereby after preventing electric vacuum pump 3 and losing efficacy, air enters into vacuum booster 1 degree of vacuum of vacuum booster 1 is obviously declined, and affects the traffic safety of vehicle.
On the basis of technique scheme, the present invention also provides the electronlmobil that comprises the vacuum boost system described in technique scheme.
In addition, vacuum servo control method provided by the invention, comprises the steps:
First, detect the degree of vacuum in vacuum booster 1, when the low vacuum of this detection is during in predetermined lower bound value, control electric vacuum pump 3 work with the gas in extracting vacuum servo-unit 1 and the vacuum reservoir 10 that is connected with this vacuum booster 1, and detect in real time the degree of vacuum in vacuum booster 1 in electric vacuum pump 3 working processs;
The second, when the degree of vacuum in vacuum booster 1 equals predetermined upper limit value, control electric vacuum pump 3 and quit work.
As preferred embodiment, in first step, by the vacuum sensor 2 being arranged on vacuum booster 1, detect degree of vacuum.
Preferably, by control unit 4, receive the degree of vacuum signal that vacuum sensor 2 detects, this control unit 4 is according to this degree of vacuum signal control electric vacuum pump 3.
Analysis by above technical scheme can be found out, vacuum boost system provided by the invention is because vacuum booster is communicated with vacuum reservoir, thus electric vacuum pump can aspiration vacuum servo-unit and vacuum reservoir in gas, thereby for hydraulic brake system provides a large amount of vacuum in safe range, avoid frequent starting electric vacuum pump, significantly improve the service life of electric controlled vacuum pump, thereby be beneficial to the driving safety of elec. vehicle.In addition, owing to having avoided frequent starting, thereby effectively saved the energy.Further, because vacuum boost system can provide a large amount of vacuum in safe range for hydraulic brake system, so vacuum boost system provided by the invention and corresponding vacuum servo control method can be applied on large-tonnage elec. vehicle.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.It should be noted that in addition, each concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.In addition, between various embodiment of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (7)
1. a vacuum boost system, comprise vacuum booster (1), it is characterized in that, this vacuum boost system also comprises vacuum sensor (2), electric vacuum pump (3), control unit (4) and vacuum reservoir (10), it is upper to gather the degree of vacuum in this vacuum booster (1) that described vacuum sensor (2) is arranged on described vacuum booster (1), described control unit (4) is electrically connected to described vacuum sensor (2) and electric vacuum pump (3) respectively, described electric vacuum pump (3) is connected with vacuum reservoir (10) with described vacuum booster (1) respectively by pipeline, and described vacuum reservoir (10) is connected with described vacuum booster (1).
2. vacuum boost system according to claim 1, it is characterized in that, described pipeline comprises the first pipeline (8), the second pipeline (6), the 3rd pipeline (7) and T-pipe joint (9), the first interface of this T-pipe joint (9) is connected with described vacuum reservoir (10) by described the first pipeline (8), the second interface is connected with described vacuum booster (1) by described the second pipeline (6), and the 3rd interface is connected with described electric vacuum pump (3) by described the 3rd pipeline (7).
3. vacuum boost system according to claim 2, is characterized in that, on described the 3rd pipeline (7), is provided with check valve, and the forward port of this check valve is communicated with described T-pipe joint (9).
4. an electronlmobil, is characterized in that, this electronlmobil comprises the vacuum boost system described in any one in claims 1 to 3.
5. a vacuum servo control method, is characterized in that, comprises the steps:
First, detect the degree of vacuum in vacuum booster (1), when the low vacuum of this detection is during in predetermined lower bound value, control electric vacuum pump (3) work with the gas in the vacuum reservoir that extracts described vacuum booster (1) and be connected with this vacuum booster (1), and detect in real time the degree of vacuum in described vacuum booster (1) in described electric vacuum pump (3) working process;
The second, when the degree of vacuum in described vacuum booster (1) equals predetermined upper limit value, control described electric vacuum pump (3) and quit work.
6. vacuum servo control method according to claim 5, is characterized in that, in described first step, by the vacuum sensor (2) being arranged on described vacuum booster (1), detects degree of vacuum.
7. vacuum servo control method according to claim 6, it is characterized in that, by control unit (4), receive the degree of vacuum signal that described vacuum sensor (2) detects, this control unit (4) is according to electric vacuum pump (3) described in this degree of vacuum signal control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210369313.5A CN103693033A (en) | 2012-09-27 | 2012-09-27 | Vacuum boosting system, electric vehicle and vacuum boosting control method |
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| CN201210369313.5A CN103693033A (en) | 2012-09-27 | 2012-09-27 | Vacuum boosting system, electric vehicle and vacuum boosting control method |
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| CN103693033A true CN103693033A (en) | 2014-04-02 |
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| CN201210369313.5A Pending CN103693033A (en) | 2012-09-27 | 2012-09-27 | Vacuum boosting system, electric vehicle and vacuum boosting control method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442774A (en) * | 2014-12-03 | 2015-03-25 | 吉林东光奥威汽车制动系统有限公司 | Vacuum braking boosting system |
| CN104527626A (en) * | 2015-01-22 | 2015-04-22 | 北京市进联国玉制动泵有限责任公司 | Control system and vacuumizing system of electric vacuum pump |
| CN106696936A (en) * | 2015-08-27 | 2017-05-24 | 上海汽车集团股份有限公司 | Vacuum boosting system, braking system and automobile |
| CN107499298A (en) * | 2017-09-13 | 2017-12-22 | 无锡商业职业技术学院 | Vacuum control device for electric automobile braking system |
| CN110588359A (en) * | 2019-08-23 | 2019-12-20 | 江苏大学 | Control method and control device for braking energy recovery |
| CN114684090A (en) * | 2020-12-30 | 2022-07-01 | 北汽福田汽车股份有限公司 | Vacuum servo assistance system, vehicle control method, storage medium and vehicle |
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| WO2004020266A1 (en) * | 2002-08-28 | 2004-03-11 | Dahlstroem Claes | A compressed-air system for a utility vehicle |
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| CN201816579U (en) * | 2010-09-25 | 2011-05-04 | 阿尔特(中国)汽车技术有限公司 | Brake assist system for electric automobile |
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Patent Citations (6)
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| WO2004020266A1 (en) * | 2002-08-28 | 2004-03-11 | Dahlstroem Claes | A compressed-air system for a utility vehicle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442774A (en) * | 2014-12-03 | 2015-03-25 | 吉林东光奥威汽车制动系统有限公司 | Vacuum braking boosting system |
| CN104527626A (en) * | 2015-01-22 | 2015-04-22 | 北京市进联国玉制动泵有限责任公司 | Control system and vacuumizing system of electric vacuum pump |
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| CN106696936A (en) * | 2015-08-27 | 2017-05-24 | 上海汽车集团股份有限公司 | Vacuum boosting system, braking system and automobile |
| CN106696936B (en) * | 2015-08-27 | 2019-10-01 | 上海汽车集团股份有限公司 | Vacuum boost system, braking system and automobile |
| CN107499298A (en) * | 2017-09-13 | 2017-12-22 | 无锡商业职业技术学院 | Vacuum control device for electric automobile braking system |
| CN110588359A (en) * | 2019-08-23 | 2019-12-20 | 江苏大学 | Control method and control device for braking energy recovery |
| CN114684090A (en) * | 2020-12-30 | 2022-07-01 | 北汽福田汽车股份有限公司 | Vacuum servo assistance system, vehicle control method, storage medium and vehicle |
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Application publication date: 20140402 |