CN110406514B - Control method and device for working threshold of vacuum pump and automobile - Google Patents
Control method and device for working threshold of vacuum pump and automobile Download PDFInfo
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- 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
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Abstract
The invention discloses a method and a device for controlling a working threshold value of a vacuum pump and an automobile. Wherein, the method comprises the following steps: enabling the vacuum pump to work for a first preset time, and enabling the vacuum degree of the vacuum pump to be changed from the initial vacuum degree to the current vacuum degree; judging whether the current vacuum degree reaches an initial working threshold value; and if not, adjusting the initial working threshold value according to a preset condition to change the initial working threshold value into the current working threshold value. The invention solves the technical problem of increased manufacturing cost of the whole vehicle caused by the normal operation of the vacuum pump in the high-altitude area by adding the atmospheric pressure sensor in the brake system in the prior art.
Description
Technical Field
The invention relates to the field of automobile technology application, in particular to a method and a device for controlling a working threshold value of a vacuum pump and an automobile.
Background
Due to the development of automobile science and technology, new energy automobiles are in short supply with world energy, so that the automobile market is forced to seek new automobile products to relieve the problem of energy shortage. Wherein, new energy automobile includes: a pure electric vehicle, a natural gas-powered vehicle or a hybrid vehicle (oil-electric or gas-electric vehicle).
The vacuum pump is used for providing a vacuum source for a brake system, so that the booster can work, and a driver can control the vehicle to decelerate with limited foot force. The vacuum pump needs to provide a certain vacuum degree to ensure the effective operation of braking. However, most of the existing vacuum pump control methods are vacuum degree threshold control, that is, a sensor is arranged in a vacuum tube or a vacuum booster to detect a pressure value, if the pressure in the pipeline is higher than a target value, which indicates that the vacuum degree is low, the vacuum pump is started to work, and the vacuum pump is closed until the pressure in the pipeline is reduced to the target value. The opening pressure and the closing pressure are fixed values. The opening value and the closing value of the vacuum pump are usually calibrated by 1011mbar relative to the atmospheric pressure at sea level, the air pressure of the opening of the vacuum pump is 400mbar, the closing of the vacuum pump is 200mbar, and the vacuum degree in the brake system is 600-800 mbar.
In a high altitude area, if the sea wave is 4000 meters, the atmospheric pressure is 600mbar, according to the logic of the original sea level, the air pressure of the vacuum pump is 400mbar when the vacuum pump is opened, and the air pressure is 200mbar when the vacuum pump is closed, so that the vacuum degree in the vacuum pipeline is 400mbar at the maximum (atmospheric pressure-vacuum pipe internal pressure), and 200mbar at the minimum, a driver feels that the pedal is hard, and the vehicle cannot be controlled to decelerate. In order to solve this problem, some manufacturers add an atmospheric pressure sensor to adjust the opening and closing thresholds based on the atmospheric pressure. This scheme has increased a sensor, and whole car cost increases.
Aiming at the problem that the manufacturing cost of the whole vehicle is increased due to the fact that an atmospheric pressure sensor is added in a braking system to meet the normal operation of a vacuum pump in a high-altitude area in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling a working threshold value of a vacuum pump and an automobile, which are used for at least solving the technical problem that in the prior art, the normal operation of the vacuum pump in a high-altitude area is met by adding an atmospheric pressure sensor in a brake system, so that the manufacturing cost of the whole automobile is increased.
According to an aspect of the embodiments of the present invention, there is provided a method for controlling an operating threshold of a vacuum pump, including: s1, enabling the vacuum pump to work for a first preset time, and enabling the vacuum degree of the vacuum pump to be changed from the initial vacuum degree to the current vacuum degree; s2, judging whether the current vacuum degree reaches an initial working threshold value; and S3, when the judgment result is negative, adjusting the initial working threshold value according to the preset condition to change the initial working threshold value into the current working threshold value.
Optionally, after step S3, the method further includes: s4, judging whether the current vacuum degree reaches the current working threshold value; s5, when the judgment result is negative, taking the current vacuum degree in the current cycle as the initial vacuum degree of the next cycle, taking the current working threshold value in the current cycle as the initial working threshold value of the next cycle, and repeating the steps S1-S5 until the current vacuum degree reaches the current working threshold value in the current cycle.
Further, optionally, when the initial operating threshold includes an opening vacuum degree and a closing vacuum degree, adjusting the initial operating threshold according to a preset condition, so that the changing of the initial operating threshold to the current operating threshold includes: turning off the vacuum degree value under the preset gradient value; and according to the turned-down closed vacuum degree value, turning down the turned-up open vacuum degree value according to a preset proportion value.
Optionally, after step S1, the method further includes: and after the vacuum pump works for a second preset time, monitoring the reduction of the vacuum degree value of the vacuum pump, and if the reduction value is greater than a preset calibration value, outputting that the vacuum pump breaks down.
Optionally, the method further includes: in any driving cycle, the initial working thresholds are the same preset working threshold, wherein the initial working thresholds comprise: a preset on-vacuum value and a preset off-vacuum value.
Optionally, the method further includes: and if the judgment result is yes, taking the current operation threshold as the operation threshold of the vacuum pump.
Optionally, step S5 further includes: and when the judgment result is yes, taking the current working threshold as the working threshold of the vacuum pump.
Optionally, adjusting the initial working threshold according to a preset condition, so that changing the initial working threshold into the current working threshold includes: and inquiring a working threshold value which corresponds to the current vacuum degree and is matched with the normal working of the vacuum pump, and taking the matched working threshold value as the current working threshold value of the vacuum pump.
According to another aspect of the embodiments of the present invention, there is also provided a control apparatus for an operating threshold of a vacuum pump, including: the adjusting module is used for enabling the vacuum pump to work for a first preset time, and changing the vacuum degree of the vacuum pump from the initial vacuum degree to the current vacuum degree; the judging module is used for judging whether the current vacuum degree reaches an initial working threshold value; and the control module is used for adjusting the initial working threshold value according to a preset condition when the judgment result is negative, so that the initial working threshold value is changed into the current working threshold value.
According to still another aspect of the embodiments of the present invention, there is also provided an automobile including: the vacuum pump control system comprises a control device of a vacuum pump working threshold value, wherein the control device of the vacuum pump working threshold value is the control device of the vacuum pump working threshold value.
In the embodiment of the invention, the vacuum degree of the vacuum pump is changed from the initial vacuum degree to the current vacuum degree by enabling the vacuum pump to work for a first preset time by adopting a mode of self-regulating the vacuum degree according to a preset proportion; judging whether the current vacuum degree reaches an initial working threshold value; and when the judgment result is negative, adjusting the initial working threshold value according to the preset condition to change the initial working threshold value into the current working threshold value, so that the aim of adjusting the control threshold value of the vacuum pump in the low-atmosphere area through the control logic is fulfilled, the technical effect of reducing the manufacturing cost of the whole vehicle is realized, and the technical problem of increasing the manufacturing cost of the whole vehicle due to the fact that the normal operation of the vacuum pump in the high-altitude area is met by adding the atmospheric pressure sensor in the braking system in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic flow chart of a method for controlling an operating threshold of a vacuum pump according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control device for an operating threshold of a vacuum pump according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for controlling an operating threshold of a vacuum pump, wherein the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and wherein, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than that illustrated herein.
Fig. 1 is a schematic flow chart of a method for controlling an operating threshold of a vacuum pump according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
s1, enabling the vacuum pump to work for a first preset time, and enabling the vacuum degree of the vacuum pump to be changed from the initial vacuum degree to the current vacuum degree;
s2, judging whether the current vacuum degree reaches an initial working threshold value;
and S3, when the judgment result is negative, adjusting the initial working threshold value according to the preset condition to change the initial working threshold value into the current working threshold value.
Optionally, after step S3, the method further includes:
s4, judging whether the current vacuum degree reaches the current working threshold value;
s5, when the judgment result is negative, taking the current vacuum degree in the current cycle as the initial vacuum degree of the next cycle, taking the current working threshold value in the current cycle as the initial working threshold value of the next cycle, and repeating the steps S1-S5 until the current vacuum degree reaches the current working threshold value in the current cycle.
The application provides a control method of vacuum pump work threshold value can be applicable to the vacuum pump brake control in high-altitude area, be different from measuring atmospheric pressure through adding atmospheric pressure sensor among the prior art, and then the threshold value of opening and closing according to atmospheric pressure adjustment, and this application need not add atmospheric pressure sensor, carry out self-adjustment according to the vacuum degree of vacuum pump, obtain the work threshold value of the vacuum pump who is fit for current area, realized under the condition that does not increase the cost, the solution is guaranteeing that brake pedal power is in the controllable within range of manpower in different altitude areas, increase the reliability of vehicle.
Specifically, as shown in fig. 1, first, the initial operating threshold is adjusted according to a preset condition, and the adjusting manner may include: and amplifying or reducing the initial working threshold in a proportional mode, or increasing or decreasing the initial working threshold in a constant increasing or decreasing mode, so that the initial working threshold becomes the current working threshold, further detecting the detected vacuum degree according to the current working threshold, and repeating the steps from S1 to S4 if the vacuum degree does not reach the current working threshold until the current vacuum degree reaches the current working threshold in the current cycle.
The control method for the working threshold of the vacuum pump comprises two implementation modes, wherein the first scheme is as follows: comparing the detected vacuum degree with a working threshold value, and adjusting the working threshold value until the vacuum pump is driven to brake effectively; scheme II: according to the detected vacuum degree, directly adjusting the working threshold value matched with the vacuum degree prestored in the vehicle even if the vacuum pump works normally; wherein, the two schemes are implemented as follows:
the first scheme is as follows: gradient regulation
The vacuum degree of the vacuum pump is gradually detected according to the adjusted working threshold value, the working threshold value is adjusted according to the feedback of the vacuum degree, and the normal operation of the vacuum pump is achieved through cyclic adjustment.
In the embodiment of the invention, the vacuum degree of the vacuum pump is changed from the initial vacuum degree to the current vacuum degree by enabling the vacuum pump to work for a first preset time by adopting a mode of self-regulating the vacuum degree according to a preset proportion; judging whether the current vacuum degree reaches an initial working threshold value; and when the judgment result is negative, adjusting the initial working threshold value according to the preset condition to change the initial working threshold value into the current working threshold value, so that the aim of adjusting the control threshold value of the vacuum pump in the low-atmosphere area through the control logic is fulfilled, the technical effect of reducing the manufacturing cost of the whole vehicle is realized, and the technical problem of increasing the manufacturing cost of the whole vehicle due to the fact that the normal operation of the vacuum pump in the high-altitude area is met by adding the atmospheric pressure sensor in the braking system in the prior art is solved.
Optionally, S1, the operating the vacuum pump for a first preset time period, where changing the vacuum degree of the vacuum pump from the initial vacuum degree to the current vacuum degree includes:
step1, stopping the vacuum pump after the vacuum pump works for a first preset time;
step2, judging whether the current vacuum degree of the vacuum pump reaches an initial working threshold value;
optionally, when the initial operating threshold includes an opening vacuum degree and a closing vacuum degree, the step S3 adjusts the initial operating threshold according to a preset condition, so that changing the initial operating threshold to the current operating threshold includes:
step A, turning off a vacuum degree value under a preset gradient value;
and B, lowering the opening vacuum degree value according to the lowered closing vacuum degree value by a preset proportion value.
Specifically, the closing vacuum degree value can be reduced by using a constant as the gradient under the condition that the closing vacuum degree value and the opening vacuum degree value need to be adjusted through presetting the gradient to downwards adjust the closing vacuum degree value, and then the opening vacuum degree value is downwards adjusted according to the adjusted closing vacuum degree value and the preset proportion value.
For example: assuming that the closing vacuum degree value is Qmba, the preset gradient is X, and the preset proportion value is W%, the adjusted closing vacuum degree value is: (Q-X) mba, wherein mba is pressure units, Q > (Q-X); the opening vacuum value is adjusted according to the adjusted closing vacuum value and a preset proportion value as follows: (Q-X). times.W% mba.
Optionally, after step S1, the method for controlling the operating threshold of the vacuum pump further includes:
and S6, monitoring the reduction of the vacuum degree value of the vacuum pump after the vacuum pump works for a second preset time, and outputting that the vacuum pump has a fault if the reduction value is greater than a preset calibration value.
Specifically, after the execution of S1 is completed, monitoring is performed through S6, and if the drop value is smaller than the preset calibration value, the steps S2 to S5 are executed; if the drop value is greater than the preset calibration value, S6 is executed, that is, in case the drop value is greater than the preset calibration value, it indicates that the vacuum pump is faulty and an alarm needs to be given.
Optionally, the method for controlling the operating threshold of the vacuum pump provided by the present application further includes:
step S106, in any driving cycle, the initial working thresholds are the same preset working threshold, wherein the initial working thresholds comprise: a preset on-vacuum value and a preset off-vacuum value.
Optionally, the method for controlling the operating threshold of the vacuum pump provided by the present application further includes:
and Step3, if the judgment result is yes, determining that the vacuum pump operates normally.
Specifically, after the vacuum degree is judged to reach the working threshold value, the vacuum pump runs normally, and auxiliary braking can be continuously provided for the automobile.
Optionally, step S5 further includes:
and S6, if the judgment result is yes, the current operation threshold value is used as the operation threshold value of the vacuum pump.
Specifically, after the vacuum degree is judged to reach the adjusted working threshold value, the vacuum pump runs normally, and auxiliary braking can be continuously provided for the automobile.
Scheme II: directly adjusting the working threshold value according to the working threshold value which is prestored in the vehicle and is matched with the vacuum degree to obtain the working threshold value, and adjusting the vacuum degree of the vacuum pump according to the adjusted working threshold value
Optionally, adjusting the initial working threshold according to a preset condition, so that changing the initial working threshold into the current working threshold includes:
and inquiring a working threshold value which corresponds to the current vacuum degree and is matched with the normal working of the vacuum pump, and taking the matched working threshold value as the current working threshold value of the vacuum pump.
Specifically, different from the first scheme, in the second scheme, the vacuum degree of the vacuum pump is adjusted by directly adjusting the working threshold value in a manner of inquiring the working threshold value which is prestored in the vehicle and is matched with the vacuum degree, so that the detected vacuum degree can reach the adjusted working threshold value, and braking is realized.
For example, if the vacuum degree becomes 720mbar after 3s of pumping, the off-vacuum degree value of 700mbar can be directly used as the working threshold of the final vacuum pump, instead of cycling to obtain the working threshold step by adjusting from 800mbar to 750mbar and then cycling from 750mbar to 700mbar as in the first scheme;
it should be noted that the adjusted operating threshold obtained by the gradual adjustment of the first scheme can improve the adjustment accuracy and the user experience. In the second scheme, the response efficiency of the internal control of the automobile is improved by adopting a one-step adjustment mode that the working threshold matched with the normal working of the vacuum pump is the current working threshold, namely, the working threshold matched with the current vacuum degree prestored in the automobile is inquired and used as the current working threshold; the first scheme is more accurate than the second scheme, and the practical vehicle has stronger applicability because the vacuum value measured by the pressure sensor may be inaccurate if the vehicle runs on a bumpy road condition, for example, the vacuum value measured when the vehicle bumps is 620mbar, if the vacuum value is adjusted by the second scheme, the vacuum value is changed into '450 mbar of opening vacuum value and 600mbar of closing vacuum value', and the actual vacuum value is 750mbar, if the operation threshold value is adjusted by the first scheme, the vacuum value is '562.5 mbar of opening vacuum value and 750mbar of closing vacuum value'. Therefore, the method of scheme one is more accurate than the method of scheme two.
In addition, the method for controlling the operating threshold of the vacuum pump provided by the present application may further include, in the process of adopting the first or second aspect: and under the condition that the detected vacuum degree does not reach the working threshold value, displaying the vacuum degree on a center console of the automobile in a prompt message mode, and executing a vacuum pump braking scheme corresponding to the selection instruction by acquiring the selection instruction of the user.
In summary, the method for controlling the working threshold of the vacuum pump provided by the present application may be applied to a new energy vehicle, where the new energy vehicle may include: an electric powered vehicle, a gasoline-electric hybrid vehicle, or a gas-electric hybrid vehicle.
The control method of the working threshold of the vacuum pump provided by the application is based on a traditional brake system, and the brake system comprises the following steps: the vacuum pump, vacuum servo mechanism, vacuum pressure sensor and vacuum tube. And the adjustment of the control threshold value of the vacuum pump in the low-atmosphere area is realized through control logic.
The opening and closing threshold values of the vacuum pump in the control method of the working threshold value of the vacuum pump are values related to the atmospheric pressure, and are not fixed values. In order to prevent the long-time ineffective work of the vacuum pump, the longest working time of the vacuum pump is set, and the vacuum pump is prevented from being burnt out due to overheating.
The control method of the working threshold of the vacuum pump can ensure that the vacuum pump is used by vehicles in high sea wave areas, and accidents caused by insufficient foot force and uncontrollable vehicle braking are avoided. Meanwhile, the confidence of the braking of the customers in the high-sea wave area is greatly improved. In addition, most importantly, compared with the scheme of adding the atmospheric pressure sensor in the prior art, the cost is reduced.
Example two
According to another aspect of the embodiments of the present invention, there is further provided a control device for an operating threshold of a vacuum pump, and fig. 2 is a schematic structural diagram of the control device for an operating threshold of a vacuum pump according to the embodiments of the present invention, as shown in fig. 2, including:
the adjusting module 22 is configured to enable the vacuum pump to operate for a first preset time period, so that the vacuum degree of the vacuum pump is changed from the initial vacuum degree to the current vacuum degree; the judging module 24 is used for judging whether the current vacuum degree reaches an initial working threshold value; and the control module 26 is configured to, if the determination result is negative, adjust the initial working threshold according to a preset condition, so that the initial working threshold becomes the current working threshold.
In the embodiment of the invention, the vacuum degree of the vacuum pump is changed from the initial vacuum degree to the current vacuum degree by enabling the vacuum pump to work for a first preset time by adopting a mode of self-regulating the vacuum degree according to a preset proportion; judging whether the current vacuum degree reaches an initial working threshold value; and when the judgment result is negative, adjusting the initial working threshold value according to the preset condition to change the initial working threshold value into the current working threshold value, so that the aim of adjusting the control threshold value of the vacuum pump in the low-atmosphere area through the control logic is fulfilled, the technical effect of reducing the manufacturing cost of the whole vehicle is realized, and the technical problem of increasing the manufacturing cost of the whole vehicle due to the fact that the normal operation of the vacuum pump in the high-altitude area is met by adding the atmospheric pressure sensor in the braking system in the prior art is solved.
Optionally, the control device for the operating threshold of the vacuum pump provided by the present application further includes:
the threshold judging module is used for judging whether the current vacuum degree reaches a current working threshold; and the threshold control module is used for taking the current vacuum degree in the current cycle as the initial vacuum degree of the next cycle and taking the current working threshold value in the current cycle as the initial working threshold value of the next cycle when the judgment result is negative, and repeating the steps from the adjustment module 22 to the threshold control module until the current vacuum degree reaches the current working threshold value in the current cycle.
Further, optionally, the control module 26 includes: the first control unit is used for reducing the closing vacuum degree value by a preset gradient value under the condition that the initial working threshold value comprises the opening vacuum degree and the closing vacuum degree; and the second control unit is used for reducing the opening vacuum degree value according to the reduced closing vacuum degree value in a preset proportion value.
Optionally, the control device for the operating threshold of the vacuum pump provided by the present application further includes: and the monitoring module is used for monitoring the reduction of the vacuum degree value of the vacuum pump after the vacuum pump works for a second preset time after the vacuum pump works for the first preset time so that the vacuum degree of the vacuum pump is changed from the initial vacuum degree to the current vacuum degree, and outputting that the vacuum pump breaks down if the reduction value is greater than a preset calibration value.
Optionally, the control device for the operating threshold of the vacuum pump provided by the present application further includes:
the first configuration module is used for setting the initial working threshold values to be the same preset working threshold values in any driving cycle, wherein the initial working threshold values comprise: a preset on-vacuum value and a preset off-vacuum value.
Optionally, the control device for the operating threshold of the vacuum pump provided by the present application further includes:
and the second configuration module is used for taking the current working threshold as the working threshold of the vacuum pump under the condition that the judgment result is yes.
Optionally, the threshold control module further includes:
and the determining unit is used for taking the current working threshold as the working threshold of the vacuum pump when the judgment result is yes.
Optionally, the control module 26 includes: and the third control unit is used for inquiring a working threshold value which corresponds to the current vacuum degree and is matched with the normal working of the vacuum pump, and the matched working threshold value is taken as the current working threshold value of the vacuum pump.
EXAMPLE III
According to still another aspect of the embodiments of the present invention, there is also provided an automobile including: the vacuum pump control system comprises a control device of a vacuum pump working threshold value, wherein the control device of the vacuum pump working threshold value is the control device of the vacuum pump working threshold value.
Optionally, the vehicle comprises: new energy automobile.
Wherein, the new energy automobile that this application provided includes: a pure electric vehicle, a natural gas-powered vehicle or a hybrid vehicle (oil-electric or gas-electric vehicle).
It should be noted that the new energy vehicle provided by the present application is only described by taking the above as an example, and as science and technology development is advanced, on the basis of further discovering new energy sources and/or clean renewable energy sources, the present application does not specifically limit the vehicle or transportation apparatus using the above energy types, so as to implement the vehicle provided by the present application.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A method for controlling an operating threshold of a vacuum pump, comprising:
s1, enabling the vacuum pump to work for a first preset time, and enabling the vacuum degree of the vacuum pump to be changed from the initial vacuum degree to the current vacuum degree;
s2, judging whether the current vacuum degree reaches an initial working threshold value;
s3, when the judgment result is negative, adjusting the initial working threshold value according to a preset condition to change the initial working threshold value into a current working threshold value;
wherein, step S3 is followed by: s4, judging whether the current vacuum degree reaches the current working threshold value; s5, when the judgment result is negative, taking the current vacuum degree in the current cycle as the initial vacuum degree of the next cycle, taking the current working threshold value in the current cycle as the initial working threshold value of the next cycle, and repeating the steps S1-S5 until the current vacuum degree reaches the current working threshold value in the current cycle.
2. A method for controlling an operating threshold of a vacuum pump according to claim 1, wherein in the case that the initial operating threshold includes an opening vacuum degree and a closing vacuum degree, the adjusting the initial operating threshold according to a preset condition to change the initial operating threshold to a current operating threshold comprises:
adjusting the closing vacuum degree down according to a preset gradient value;
and adjusting the opening vacuum degree downwards according to the adjusted closing vacuum degree in a preset proportion value.
3. A method for controlling an operating threshold of a vacuum pump as claimed in claim 1, wherein after step S1, the method further comprises:
and after the vacuum pump works for a second preset time, monitoring the reduction of the vacuum degree value of the vacuum pump, and if the reduction value is greater than a preset calibration value, outputting that the vacuum pump breaks down.
4. A method of controlling the operating threshold of a vacuum pump as claimed in any one of claims 1 to 3, further comprising:
in any driving cycle, the initial working thresholds are the same preset working threshold, wherein the initial working thresholds comprise: the preset opening vacuum degree and the preset closing vacuum degree.
5. A method of controlling the operating threshold of a vacuum pump as defined in claim 1, further comprising:
and when the judgment result is yes, taking the current working threshold as the working threshold of the vacuum pump.
6. The method for controlling an operating threshold of a vacuum pump according to claim 1, wherein the step S5 further comprises:
and when the judgment result is yes, taking the current working threshold as the working threshold of the vacuum pump.
7. A method for controlling an operating threshold of a vacuum pump as claimed in claim 1, wherein the adjusting the initial operating threshold according to a preset condition to change the initial operating threshold to a current operating threshold comprises:
and inquiring a working threshold value which is matched with the current vacuum degree and enables the vacuum pump to normally work, and taking the matched working threshold value as the current working threshold value of the vacuum pump.
8. An apparatus for controlling an operating threshold of a vacuum pump, comprising:
the adjusting module is used for enabling the vacuum pump to work for a first preset time, and changing the vacuum degree of the vacuum pump from the initial vacuum degree to the current vacuum degree;
the judging module is used for judging whether the current vacuum degree reaches an initial working threshold value;
the control module is used for adjusting the initial working threshold value according to a preset condition when the judgment result is negative, so that the initial working threshold value is changed into the current working threshold value;
after the initial working threshold is adjusted according to a preset condition and is changed into a current working threshold, judging whether the current vacuum degree reaches the current working threshold; and when the judgment result is negative, taking the current vacuum degree in the current cycle as the initial vacuum degree of the next cycle, taking the current working threshold value in the current cycle as the initial working threshold value of the next cycle, and repeating the process from the adjusting module to the control module until the current vacuum degree reaches the current working threshold value in the current cycle.
9. An automobile, comprising: a vacuum pump control system, wherein the vacuum pump control system comprises a control device of a vacuum pump operation threshold value, which is the control device of the vacuum pump operation threshold value according to claim 8.
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| CN111645657B (en) * | 2020-01-14 | 2021-10-01 | 摩登汽车有限公司 | Electronic vacuum pump control method and system of electric automobile and electric automobile |
| CN111439275A (en) * | 2020-04-07 | 2020-07-24 | 奇瑞商用车（安徽）有限公司 | Automobile vacuum pump fault processing method and system |
| CN114620018B (en) * | 2020-12-14 | 2023-04-28 | 威马智慧出行科技(上海)股份有限公司 | Vacuum pump control method, system, storage medium and electronic equipment |
| CN113775525A (en) * | 2021-11-09 | 2021-12-10 | 杭州智科精密机械有限公司 | Safety control method and system of vacuum pump and new energy automobile |
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| CN104568301B (en) * | 2014-12-24 | 2017-04-12 | 格力电器（合肥）有限公司 | Method and device for detecting equipment vacuum degree |
| CN105539409B (en) * | 2015-11-30 | 2018-07-17 | 北京新能源汽车股份有限公司 | Brake boosting system of vehicle and vehicle with same |
| CN106379303B (en) * | 2016-10-26 | 2019-04-09 | 浙江吉利控股集团有限公司 | A kind of Vehicular electric vacuum pump control system and its method |
| CN107697054B (en) * | 2017-09-18 | 2019-08-16 | 北京长城华冠汽车科技股份有限公司 | A kind of modification method and device of vacuum servo parameter |
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