CN201932148U - Electric vehicle vacuum boosting device based on absolute pressure sensor - Google Patents
Electric vehicle vacuum boosting device based on absolute pressure sensor Download PDFInfo
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- CN201932148U CN201932148U CN2011200313879U CN201120031387U CN201932148U CN 201932148 U CN201932148 U CN 201932148U CN 2011200313879 U CN2011200313879 U CN 2011200313879U CN 201120031387 U CN201120031387 U CN 201120031387U CN 201932148 U CN201932148 U CN 201932148U
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- vacuum
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- electronic control
- vacuum pump
- pressure sensor
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- Braking Systems And Boosters (AREA)
Abstract
The utility model discloses an electric vehicle vacuum boosting device based on an absolute pressure sensor, comprising a brake pedal, a vacuum booster, a brake master cylinder, an electric vacuum pump, a vacuum energy accumulator, the absolute pressure sensor and an electronic control device formed by connecting an operational amplifier and a Schmidt trigger, wherein the vacuum booster is respectively connected with the brake pedal and the brake master cylinder; the electric vacuum pump is respectively connected with the vacuum energy accumulator and the vacuum booster by vacuum pipelines; the vacuum energy accumulator is provided with the absolute pressure sensor; and the electronic control device is respectively and electrically connected with the absolute pressure sensor and the electric vacuum pump. In the electric vehicle vacuum boosting device, at high-altitude regions, the energy consumption of the vacuum pump is low, and the system reliability is high; and at low-altitude regions, the working capability of the vacuum pump is utilized furthest, and the applicability of the electric vehicle in large-range application is ensured.
Description
Technical field
The utility model relates to the electronlmobil work-saving device, relates in particular to a kind of electronlmobil vacuum booster unit based on absolute-pressure pickup.
Background technology
Because electronlmobil electrical motor itself can't produce negative pressure of vacuum, utilize electric vacuum pump to provide continuously reliable vacuum servo source, simultaneously for energy savings and improve its life-span and introduced vacuum checking device for braking.Passing through vacuum checking device at present, in the method that the control vacuum pump is worked in fixing vacuum pressure scope, the vacuum values of using that vacuum checking device is surveyed is the relative vacuum degree, be the numerical value that the system pressure actual numerical value is lower than on-the-spot atmospheric pressure, this method is suitable for for traveling automobile in fixed area.If but electronlmobil really enters the large-scale application stage, this mode is inappropriate for the vehicle that travels on Different Altitude Regions.For example the regional bar pressure in China Qinghai-Tibet Platean only is equivalent to 50～70% of Plain.At region of no relief vacuum booster pump working properly, descend to service life in that highlands work is too frequent, and noise increases.
At present, in other schemes of this type of problem of solution, once having technical personnel to mention increases an atmospheric-pressure sensor, utilizes two sensors to provide signal to electronic controller, improve the Applicable scope and the life-span of device, but this method has increased the complexity of device.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, and a kind of electronlmobil vacuum booster unit based on absolute-pressure pickup is provided.Solved the technical matters of existing brake booster range of use limitation.
The utility model is achieved through the following technical solutions:
A kind of electronlmobil vacuum booster unit based on absolute-pressure pickup, comprise brake pedal, vacuum booster, master brake cylinder, electric vacuum pump, the vacuum accumulator device, absolute-pressure pickup, the electronic control package that is connected to form by op amp and Schmidt trigger, described vacuum booster is connected with master brake cylinder with brake pedal respectively, electric vacuum pump respectively with the vacuum accumulator device, vacuum booster connects by vacuum line, on the vacuum accumulator device absolute-pressure pickup is installed, electronic control package respectively with absolute-pressure pickup, electric vacuum pump is electrically connected.Described electronic control package adopts analog or digital electronic control setup.
Compared with prior art the beneficial effects of the utility model are: because absolute-pressure pickup can be measured the absolute vacuum degree in the vacuum accumulator device, sensor signal is delivered to the electronic control package that is connected to form by op amp and Schmidt trigger, by with electronic control package in predefined absolute vacuum bound relatively, the action of control electric vacuum pump.The vacuum pressure upper and lower limit so once is set, can makes the operation pressure interval of vacuum pump change and change automatically, guaranteed that automobile brake has stable power-assisted effect with external atmospheric pressure.The electronic controller simple structure that employing is made of op amp and Schmidt trigger, with low cost.
The utility model can both guarantee deceleration and stopping performance in high and low Altitude Regions, has low energy consumption, and the system reliability advantages of higher is easy to utilize.
Description of drawings
Fig. 1 is the connection diagram of the utility model based on the electronlmobil vacuum booster unit each several part of absolute-pressure pickup.
Fig. 2 is the further block diagram of Fig. 1.
The specific embodiment
Below in conjunction with specific embodiment the utility model is done further concrete detailed description the in detail, but embodiment of the present utility model is not limited thereto, the technological parameter for not indicating especially can carry out with reference to routine techniques.
Embodiment
As Fig. 1, shown in Figure 2, the utility model is based on the electronlmobil vacuum booster unit of absolute-pressure pickup, comprise brake pedal 1, vacuum booster 2, master brake cylinder 3, electric vacuum pump 4, vacuum accumulator device 5, absolute-pressure pickup 6, the electronic control package 7 that is connected to form by op amp and Schmidt trigger, described vacuum booster 2 is connected with master brake cylinder 3 with brake pedal 1 respectively, electric vacuum pump 4 respectively with vacuum accumulator device 5, vacuum booster 2 connects by vacuum line, absolute-pressure pickup 6 is installed on the vacuum accumulator device 5, electronic control package 7 respectively with absolute-pressure pickup 6, electric vacuum pump 4 is electrically connected.
The absolute-pressure pickup of installing on the vacuum accumulator device 56 is used to measure the absolute vacuum degree in the vacuum accumulator device 5.
After the energising of complete vehicle electrical equipment, electronic control package 7 is started working, and the absolute vacuum degree signal that vacuum pressure sensor 7 will be surveyed is transferred to electronic control package 7.Electronic control package 7 is according to default upper lower limit value, and control electric vacuum pump 4 is worked.
For example, the upper and lower limit that the absolute vacuum degree that can trigger 4 work of electronic controller 7 control vacuum pumps is set is respectively 35kpa, 25kpa.Two kinds of situations of vehicle ' are as follows:
When vehicle ' at region of no relief, suppose that this moment, bar pressure was 100kpa (absolute value), by the upper and lower limit of absolute vacuum degree be respectively 35kpa, 25kpa draw the operation pressure of corresponding electric vacuum pump 4 interval for-75kpa (relative value) to-65kpa (relative value).Automobile just starts, the vacuum accumulator device 5 interior absolute vacuum degree that electronic control package 7 receives absolute-pressure pickup 6 measurements are lower than 35kpa, 4 runnings of electronic control package 7 control electric vacuum pumps, degree of vacuum in the vacuum accumulator device 5 increases, after the absolute vacuum degree arrived 25kpa, electronic control package 7 control electric vacuum pumps 4 shut down.Along with several times braking in the vehicle traveling process, the degree of vacuum in the vacuum accumulator device 5 reduces, and after arriving 35kpa, then electronic control package 8 control electric vacuum pumps 4 turn round once more, arrive 25kpa until the absolute vacuum degree.Reciprocal successively, arrive the destination until automobile, the driver controls the auto electrical appliance outage.
When vehicle moves in the highlands, if this moment, bar pressure was 70kpa (absolute value), the operation pressure interval of cooresponding electric vacuum pump 4 becomes-45kpa (relative value) is to-35kpa (relative value).Automatically the operation pressure interval that changes electric vacuum pump 4 like this with the external atmosphere pressure variation provides stable power-assisted for car brakeing, and energy savings improves the service life of vacuum pump simultaneously.
Electronic control package is divided into analog electronic controller and digital electronic controller, and this programme adopts analog electronic controller, is connected to form with an op amp and Schmidt trigger.This electronic controller simple structure, the efficient height, cost is low.
Absolute vacuum degree in the vacuum accumulator device 5 that absolute-pressure pickup 6 is measured is lower than the higher limit of setting, then electronic control package 7 control electric vacuum pumps 4 runnings, air pressure in the vacuum accumulator device 5 reduces gradually, after the absolute vacuum degree arrived the upper limit, electronic control package 7 control electric vacuum pumps 4 shut down.Along with several times braking in the vehicle traveling process, the degree of vacuum in the vacuum accumulator device 5 increases, and after arriving lower limit, then electronic control package 8 control electric vacuum pumps 4 turn round once more, arrive higher limit until the absolute vacuum degree.Reciprocal successively.Can control vacuum pump thus and operate at the optimum efficiency district, reducing noise level and wearing and tearing.
Just can realize the utility model preferably as mentioned above.
The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (2)
1. electronlmobil vacuum booster unit based on absolute-pressure pickup, it is characterized in that: comprise brake pedal, vacuum booster, master brake cylinder, electric vacuum pump, the vacuum accumulator device, absolute-pressure pickup, the electronic control package that is connected to form by op amp and Schmidt trigger, described vacuum booster is connected with master brake cylinder with brake pedal respectively, electric vacuum pump respectively with the vacuum accumulator device, vacuum booster connects by vacuum line, on the vacuum accumulator device absolute-pressure pickup is installed, electronic control package respectively with absolute-pressure pickup, electric vacuum pump is electrically connected.
2. the electronlmobil vacuum booster unit based on absolute-pressure pickup according to claim 1 is characterized in that: described electronic control package adopts analog or digital electronic control setup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200313879U CN201932148U (en) | 2011-01-28 | 2011-01-28 | Electric vehicle vacuum boosting device based on absolute pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200313879U CN201932148U (en) | 2011-01-28 | 2011-01-28 | Electric vehicle vacuum boosting device based on absolute pressure sensor |
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| Publication Number | Publication Date |
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| CN201932148U true CN201932148U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200313879U Expired - Fee Related CN201932148U (en) | 2011-01-28 | 2011-01-28 | Electric vehicle vacuum boosting device based on absolute pressure sensor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371984A (en) * | 2011-08-29 | 2012-03-14 | 温州大学 | Vacuum boosting device of electric vehicle |
| CN103723137A (en) * | 2013-12-30 | 2014-04-16 | 重庆长安铃木汽车有限公司 | Brake assisting power control method for electric vehicle |
| CN104828050A (en) * | 2014-02-12 | 2015-08-12 | 上海通用汽车有限公司 | Vehicle electronic vacuum pump control method and vehicle-mounted electronic control unit for implementing method |
| CN104903168A (en) * | 2012-11-29 | 2015-09-09 | 雷诺两合公司 | Method for estimating pressure in vacuum reservoir of brake servo |
| CN105365800A (en) * | 2014-08-19 | 2016-03-02 | 丰田自动车株式会社 | Control device for electrically-driven vacuum pump |
| CN108372851A (en) * | 2018-02-01 | 2018-08-07 | 阿尔特汽车技术股份有限公司 | A kind of Motorized vacuum pump control system when no barometric pressure sensor |
| CN112744199A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Electro-hydraulic brake system, application method thereof and vehicle |
-
2011
- 2011-01-28 CN CN2011200313879U patent/CN201932148U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371984A (en) * | 2011-08-29 | 2012-03-14 | 温州大学 | Vacuum boosting device of electric vehicle |
| CN104903168A (en) * | 2012-11-29 | 2015-09-09 | 雷诺两合公司 | Method for estimating pressure in vacuum reservoir of brake servo |
| CN104903168B (en) * | 2012-11-29 | 2017-08-15 | 雷诺两合公司 | The method of the pressure in vacuum storage tank for estimating brake servo device |
| CN103723137A (en) * | 2013-12-30 | 2014-04-16 | 重庆长安铃木汽车有限公司 | Brake assisting power control method for electric vehicle |
| CN104828050A (en) * | 2014-02-12 | 2015-08-12 | 上海通用汽车有限公司 | Vehicle electronic vacuum pump control method and vehicle-mounted electronic control unit for implementing method |
| CN104828050B (en) * | 2014-02-12 | 2018-01-23 | 上海通用汽车有限公司 | The control method of auto electronic vavuum pump and the controlled vehicle-mounted electrical unit for realizing this method |
| CN105365800A (en) * | 2014-08-19 | 2016-03-02 | 丰田自动车株式会社 | Control device for electrically-driven vacuum pump |
| CN105365800B (en) * | 2014-08-19 | 2018-03-16 | 丰田自动车株式会社 | The control device of electrodynamic type vavuum pump |
| CN108372851A (en) * | 2018-02-01 | 2018-08-07 | 阿尔特汽车技术股份有限公司 | A kind of Motorized vacuum pump control system when no barometric pressure sensor |
| CN108372851B (en) * | 2018-02-01 | 2021-03-30 | 阿尔特汽车技术股份有限公司 | Electric vacuum pump control system without atmospheric pressure sensor |
| CN112744199A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Electro-hydraulic brake system, application method thereof and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20180128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |