CN109733360A - Electronic vacuum pump control system and control method - Google Patents
Electronic vacuum pump control system and control method Download PDFInfo
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- CN109733360A CN109733360A CN201811550870.0A CN201811550870A CN109733360A CN 109733360 A CN109733360 A CN 109733360A CN 201811550870 A CN201811550870 A CN 201811550870A CN 109733360 A CN109733360 A CN 109733360A
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Abstract
The present invention proposes that a kind of electronic vacuum pump control system and control method, control system include: vacuum pump, power supply, solenoid valve, controller, absolute pressure transducer, relative pressure sensor, vacuum booster, check valve, vacuum line and vacuum tank；Three ends of solenoid valve are connect with the first end of the first end of vacuum pump, the anode of power supply and controller respectively, the cathode of the second end connection power supply of vacuum pump, the second end of controller and third end are separately connected vacuum booster and vacuum tank, pipeline is equipped between vacuum booster and vacuum tank, absolute pressure transducer is arranged on vacuum tank, relative pressure sensor is arranged on vacuum booster, and check valve is arranged in the vacuum line between vacuum booster and vacuum tank.The present invention solve in the prior art using a B/P EGR Back Pressure Transducer EGR control when, can not carry out vacuum pump under various height above sea levels beginning and close control the technical issues of.
Description
Technical field
The present invention relates to automotive field more particularly to a kind of electronic vacuum pump control system and control methods.
Background technique
As new-energy automobile is universal, pure electric automobile, mixed motor-car type etc. are starting large-scale popularization, vacuum boost system
Also machine negative pressure power-assisted is started to be changed by electronic vacuum pump negative pressure power-assisted by traditional.
Most of vehicle electronic vacuum method for controlling pump are as follows in the prior art: carrying out vacuum using a B/P EGR Back Pressure Transducer EGR
System control, or controlled using a barometric pressure sensor and a B/P EGR Back Pressure Transducer EGR.
The deficiency of prior art: when being controlled using a B/P EGR Back Pressure Transducer EGR, various height above sea levels can not be carried out
The beginning and closing control of lower vacuum pump, while will lead to vacuum pump long-term work when running car is in altitude environment, it burns out
Vacuum pump and vacuum line, and can not be controlled according to air pressure after B/P EGR Back Pressure Transducer EGR failure.And use an atmospheric pressure
Force snesor and a B/P EGR Back Pressure Transducer EGR control, also resulting in barometric pressure sensor failure can not be in various height above sea level
Lower use, such as occur the problem of burning out vacuum pump and vacuum line or when B/P EGR Back Pressure Transducer EGR failure after can not according to negative pressure into
The control of row vacuum pump switch.
Summary of the invention
Based on problem above, the present invention proposes a kind of electronic vacuum pump control system and control method, solves existing skill
When being controlled in art using a B/P EGR Back Pressure Transducer EGR, the beginning of vacuum pump under various height above sea levels can not be carried out and close control
System, will lead to vacuum pump long-term work when running car is in altitude environment, burns out vacuum pump and vacuum line, and work as negative pressure
The technical issues of can not being controlled according to air pressure after sensor failure, also solves using a barometric pressure sensor and one
Will lead to when barometric pressure sensor failure caused by the control of a B/P EGR Back Pressure Transducer EGR can not use under various height above sea levels
Technical problem.
The present invention proposes a kind of electronic vacuum pump control system, comprising:
Vacuum pump, power supply, solenoid valve, controller, absolute pressure transducer, relative pressure sensor, vacuum booster, list
To valve, vacuum line and vacuum tank；
Three ends of solenoid valve are connect with the first end of the first end of vacuum pump, the anode of power supply and controller respectively, very
The cathode of the second end connection power supply of sky pump, the second end of controller and third end are separately connected vacuum booster and vacuum tank,
Pipeline is equipped between vacuum booster and vacuum tank, absolute pressure transducer is arranged on vacuum tank, and relative pressure sensor is set
It sets on vacuum booster, check valve is arranged in the vacuum line between vacuum booster and vacuum tank；
When the pressure value in vacuum booster is equal to the first unlatching value, controller is powered to vacuum pump, and vacuum pump is to true
The vacuum chamber pumping of slack tank and vacuum booster；When the pressure value in vacuum booster is equal to the first close value, controller stops
Only work.
In addition, when controller get the voltage value of absolute pressure transducer not within a preset range, voltage value be 0 or
When absolute pressure transducer short circuit, the pressure value and preset second that controller is detected according to relative pressure sensor are opened
Value, the second close value control vacuum pump.
In addition, then controller is to vacuum when the pressure value that relative pressure sensor detects is equal with the second unlatching value
Pump power supply, vacuum chamber pumping of the vacuum pump to vacuum tank and booster；When pressure value that relative pressure sensor detects and the
When two close values are equal, then controller stops powering to vacuum pump.
In addition, when controller get the voltage value of relative pressure sensor not within a preset range, voltage value be 0 or
When relative pressure sensor short circuit, the pressure value and preset third that controller is detected according to absolute pressure transducer are opened
Value, third close value control vacuum pump.
In addition, then controller is to vacuum when the pressure value that absolute pressure transducer detects is equal with third unlatching value
Pump power supply, vacuum chamber pumping of the vacuum pump to vacuum tank and booster；When pressure value that absolute pressure transducer detects and the
When three close values are equal, then controller stops powering to vacuum pump.
In addition, the first unlatching value and the first close value demarcate to obtain by different altitude height.
In addition, controller is adopted when controller gets absolute pressure transducer and relative pressure sensor while failing
With work first time period, then stop the opening and closing of the mode continuous control vacuum pump of second time period.
The present invention also proposes a kind of control method of electronic vacuum pump, comprising:
When the pressure value in vacuum booster is equal to the first unlatching value, controller is powered to vacuum pump, and vacuum pump is to true
The vacuum chamber pumping of slack tank and booster；When the pressure value in vacuum booster is equal to the first close value, controller stops work
Make；
When controller get the voltage value of absolute pressure transducer not within a preset range, voltage value be 0 or absolutely
When pressure sensor short circuit, pressure value and preset second unlatching value, that controller is detected according to relative pressure sensor
Two close values control vacuum pump；
When controller get the voltage value of relative pressure sensor not within a preset range, voltage value be 0 or opposite
When pressure sensor short circuit, pressure value and preset third unlatching value, that controller is detected according to absolute pressure transducer
Three close values control vacuum pump.
In addition, then controller is to vacuum when the pressure value that relative pressure sensor detects is equal with the second unlatching value
Pump power supply, vacuum chamber pumping of the vacuum pump to vacuum tank and booster；When pressure value that relative pressure sensor detects and the
When two close values are equal, then controller stops powering to vacuum pump.
In addition, then controller is to vacuum when the pressure value that absolute pressure transducer detects is equal with third unlatching value
Pump power supply, vacuum chamber pumping of the vacuum pump to vacuum tank and booster；When pressure value that absolute pressure transducer detects and the
When three close values are equal, then controller stops powering to vacuum pump.
By using above-mentioned technical proposal, have the following beneficial effects:
The present invention solve in the prior art using a B/P EGR Back Pressure Transducer EGR control when, various height above sea levels can not be carried out
It spends the beginning of lower vacuum pump and closes control, will lead to vacuum pump long-term work when running car is in altitude environment, burn out true
Sky pump and vacuum line, and when B/P EGR Back Pressure Transducer EGR fail after can not be controlled according to air pressure the technical issues of, also solve
It will lead to using caused by a barometric pressure sensor and a B/P EGR Back Pressure Transducer EGR control when barometric pressure sensor fails
The technical issues of can not being used under various height above sea levels.The present invention makes absolute pressure transducer, relative pressure sensor each other
Standby control, when a failure, another still is able to acquisition data, allows the controller to more reasonably control vacuum pump,
It will not make vacuum pump long-term work, vacuum pump is avoided to damage.
Detailed description of the invention
Fig. 1 is the schematic diagram of electronic vacuum pump control system provided by one embodiment of the present invention；
Fig. 2 is the flow chart of the control method of electronic vacuum pump provided by one embodiment of the present invention.
Appended drawing reference:
1-- vacuum pump 2-- power supply 3-- solenoid valve 4-- controller 5-- absolute pressure transducer 6-- relative pressure passes
Sensor 7-- vacuum booster 8-- check valve 9-- vacuum tank
Specific embodiment
Below in conjunction with specific embodiment and attached drawing, the present invention is further described in detail.It is only intended to explain in detail
Specific embodiments of the present invention are stated, any restrictions are not generated to the present invention, protection scope of the present invention is with claims
Subject to.
Referring to Fig.1, the present invention proposes a kind of electronic vacuum pump control system, comprising:
Vacuum pump 1, power supply 2, solenoid valve 3, controller 4, absolute pressure transducer 5, relative pressure sensor 6, vacuum help
Power device 7, check valve 8, vacuum line and vacuum tank 9；
Three ends of solenoid valve 3 connect with the first end of the first end of vacuum pump 1, the anode of power supply 2 and controller 4 respectively
It connects, the cathode of the second end connection power supply 2 of vacuum pump 1, the second end of controller 4 and third end are separately connected vacuum booster 7
With vacuum tank 9, pipeline is equipped between vacuum booster 7 and vacuum tank 9, absolute pressure transducer 5 is arranged on vacuum tank 9, phase
Pressure sensor 6 is arranged on vacuum booster 7, the vacuum between vacuum booster 7 and vacuum tank 9 is arranged in check valve 8
In pipeline；
When the pressure value in vacuum booster 7 is equal to the first unlatching value, controller 4 is powered to vacuum pump 1, vacuum pump 1
To the vacuum chamber pumping of vacuum tank 9 and vacuum booster 7；When the pressure value in vacuum booster 7 is equal to the first close value, control
Device 4 processed stops working.
By being arranged absolute pressure transducer 5 on vacuum tank 9 in the present embodiment, by by relative pressure sensor 6
It is arranged on vacuum booster 7, is used cooperatively absolute pressure transducer 5 and relative pressure sensor 6.
Absolute pressure transducer 5 monitors the atmospheric pressure value in vacuum tank 9, is denoted as P5, and relative pressure sensor 6 monitors vacuum and helps
The negative pressure value of 7 the inside of power device is denoted as P6, and atmospheric pressure P is the difference of P5 and P6, and Pon1 is the first unlatching value, and Poff1 is the first closing
Value.
Pon1=N1*P
Poff1=N2*4
N1, N2 are determined according to calibration verification result.
Under normal circumstances, when P6 is equal to Pon1, controller 4 is powered to vacuum pump 1, and vacuum pump 1 is to vacuum tank 9 and helps
7 vacuum chamber pumping of power device, works as P6=Poff1, controller 4 stops powering to vacuum pump 1, controller 4 by outside control after
Electric appliance opens and closes to control supply or stop powering to vacuum pump 1.Relay is arranged between controller 4 and vacuum pump 1
Route on.
The present embodiment solve in the prior art using a B/P EGR Back Pressure Transducer EGR controlled when, various height above sea level can not be carried out
The beginning and closing control of vacuum pump, will lead to vacuum pump long-term work when running car is in altitude environment, burn out under height
Vacuum pump and vacuum line, and when B/P EGR Back Pressure Transducer EGR failure after can not be controlled according to air pressure the technical issues of, also solve
Using can lead caused by barometric pressure sensor and a B/P EGR Back Pressure Transducer EGR control when barometric pressure sensor failure
The technical issues of cause can not use under various height above sea levels.The present embodiment makes absolute pressure transducer 5, relative pressure sensor
6 are mutually backups control, and when a failure, another still is able to acquisition data, and controller 4 is enable more reasonably to control very
Sky pump, will not make vacuum pump long-term work, vacuum pump is avoided to damage.
In one of them embodiment, when controller 4 gets the voltage value of absolute pressure transducer 5 not in default model
In enclosing, when voltage value is 0 or 5 short circuit of absolute pressure transducer, pressure that controller 4 is detected according to relative pressure sensor 6
Force value and preset second unlatching value, the second close value control vacuum pump 1.Preset range is, for example, 0.5v-4.5v, works as controller
Get the voltage value of absolute pressure transducer 5 not within a preset range, voltage value be 0 or 5 short circuit of absolute pressure transducer
When, then illustrate that absolute pressure transducer 5 fails, the pressure value that needs to detect by relative pressure sensor 6 at this time and default
The second unlatching value, the second close value control vacuum pump 1.Pass through preset second unlatching value, the second close value pilot controller 4
It judges, makes also controller 4 can be made to make correct judgement when absolute pressure transducer 5 fails, wherein second opens
Value, the second close value are obtained by different height above sea level real vehicle calibration verifyings, generally can operate with height above sea level 0-4800m it
Between.
In one of them embodiment, when the pressure value that relative pressure sensor 6 detects is equal with the second unlatching value
When, then controller 4 is powered to vacuum pump 1, vacuum chamber pumping of the vacuum pump 1 to vacuum tank 9 and booster 7；When relative pressure passes
When the pressure value that sensor 6 detects is equal with the second close value, then controller 4 stops powering to vacuum pump 1.
Specifically, controller 4 judges whether pressure value that relative pressure sensor 6 detects and the second unlatching value are equal,
If equal, controller 4 is powered to vacuum pump 1, if the pressure value that relative pressure sensor 6 detects is equal with the second close value
When, then controller 4 stops powering to vacuum pump 1.It is opened respectively with second by the pressure value for detecting relative pressure sensor 6
It opens value and the second close value is compared, so that controller 4 be made accurately to control vacuum pump 1.
In one of them embodiment, when controller 4 gets the voltage value of relative pressure sensor 6 not in default model
In enclosing, when voltage value is 0 or 6 short circuit of relative pressure sensor, pressure that controller 4 is detected according to absolute pressure transducer 5
Force value and preset third unlatching value, third close value control vacuum pump 1.Preset range is, for example, 0.5v-4.5v.
When controller 4 get the voltage value of relative pressure sensor 6 not within a preset range, voltage value be 0 or phase
When to 6 short circuit of pressure sensor, then illustrates that relative pressure sensor 6 fails, detected at this time according to absolute pressure transducer 5
Pressure value and preset third unlatching value, third close value control vacuum pump 1, make the reasonably control vacuum pump 1 of controller 1, no
It will lead to vacuum pump to be damaged.
In one of them embodiment, when the pressure value that absolute pressure transducer 5 detects is equal with third unlatching value
When, then controller 4 is powered to vacuum pump 1, vacuum chamber pumping of the vacuum pump 1 to vacuum tank 9 and booster 7；When absolute pressure passes
When the pressure value that sensor 5 detects is equal with third close value, then controller 4 stops powering to vacuum pump 1.
Specifically, controller 4 judges whether pressure value that absolute pressure transducer 5 detects and third unlatching value are equal,
Controller 4 is powered to vacuum pump 1 if equal, if the pressure value that absolute pressure transducer 5 detects is equal with third close value
When, then controller 4 stops powering to vacuum pump 1.By providing third unlatching value and third close value, make to sense when relative pressure
When device 6 fails, controller 4 also can accurately control vacuum pump 1.Wherein third unlatching value, third close value are to pass through difference
Height above sea level real vehicle calibration verifying obtain, generally can operate between height above sea level 0-4800m.
In one of them embodiment, the first unlatching value and the first close value demarcate to obtain by different altitude height.
Citing: the first unlatching value is -500mabr, the first close value is -700mabr, the second unlatching value is+400mabr, the second closing
Value is+300mar, third unlatching value is -400mbar and third close value is -500mbar.
In one of them embodiment, when controller 4 gets absolute pressure transducer 5 and relative pressure sensor 6
When failing simultaneously, controller 4 uses work first time period, then stops the mode continuous control vacuum pump 1 of second time period
Opening and closing.First time period is, for example, 5s, and second time period is, for example, 4s
In this case, it is no longer controlled, but is adopted according to absolute pressure transducer 5 and relative pressure sensor 6
It is controlled with the mode of power supply a period of time is stopped again to the power supply a period of time of vacuum pump 1, and issues prompt to automobile simultaneously
And alarm.
Referring to Fig.1, preferably, the present invention also proposes a kind of electronic vacuum pump control system, comprising:
Vacuum pump 1, power supply 2, solenoid valve 3, controller 4, absolute pressure transducer 5, relative pressure sensor 6, vacuum help
Power device 7, check valve 8 and vacuum tank 9；
Three ends of solenoid valve 3 connect with the first end of the first end of vacuum pump 1, the anode of power supply 2 and controller 4 respectively
It connects, the cathode of the second end connection power supply 2 of vacuum pump 1, the second end of controller 4 and third end are separately connected vacuum booster 7
With vacuum tank 9, pipeline is equipped between vacuum booster 7 and vacuum tank 9, absolute pressure transducer 5 is arranged on vacuum tank 9, phase
Pressure sensor 6 is arranged on vacuum booster 7, the pipeline between vacuum booster 7 and vacuum tank 9 is arranged in check valve 8
In；
When the pressure value in vacuum booster 7 is equal to the first unlatching value, controller 4 is powered to vacuum pump 1, vacuum pump 1
To the vacuum chamber pumping of vacuum tank 9 and booster 7；When the pressure value in vacuum booster 7 is equal to the first close value, controller
4 stop working.
When controller 4 get the voltage value of absolute pressure transducer 5 not within a preset range, voltage value be 0 or absolutely
When to 5 short circuit of pressure sensor, the pressure value and preset second that controller 4 is detected according to relative pressure sensor 6 are opened
Value, the second close value control vacuum pump 1.Specifically, when the pressure value and the second unlatching value phase that relative pressure sensor 6 detects
Whens equal, then controller 4 is powered to vacuum pump 1, vacuum chamber pumping of the vacuum pump 1 to vacuum tank 9 and booster 7；Work as relative pressure
When the pressure value that sensor 6 detects is equal with the second close value, then controller 4 stops powering to vacuum pump 1.
When controller 4 get the voltage value of relative pressure sensor 6 not within a preset range, voltage value be 0 or phase
When to 6 short circuit of pressure sensor, the pressure value and preset third that controller 4 is detected according to absolute pressure transducer 5 are opened
Value, third close value control vacuum pump 1.Specifically, when the pressure value and third unlatching value phase that absolute pressure transducer 5 detects
Whens equal, then controller 4 is powered to vacuum pump 1, vacuum chamber pumping of the vacuum pump 1 to vacuum tank 9 and booster 7；Work as absolute pressure
When the pressure value that sensor 5 detects is equal with third close value, then controller 4 stops powering to vacuum pump 1.
When controller 4 gets absolute pressure transducer 5 and relative pressure sensor 6 while failing, controller 4 is used
Work first time period, then stops the opening and closing of the mode continuous control vacuum pump 1 of second time period.First opens
Value, the first close value, the second unlatching value, the second close value, third unlatching value and third close value, pass through different altitude height mark
Surely it obtains.
No matter the present embodiment makes controller 1 under any circumstance, vacuum pump 1 can be accurately controlled, makes vacuum pump 1 not
It is easily damaged, extend the service life of vacuum pump 1.
- Fig. 2 referring to Fig.1, the present invention propose a kind of control method of electronic vacuum pump, comprising:
When the pressure value in vacuum booster 7 is equal to the first unlatching value, controller 4 is powered to vacuum pump 1, vacuum pump 1
To the vacuum chamber pumping of vacuum tank 9 and booster 7；When the pressure value in vacuum booster 7 is equal to the first close value, controller
4 stop working；
When controller 4 get the voltage value of absolute pressure transducer 5 not within a preset range, voltage value be 0 or absolutely
When to 5 short circuit of pressure sensor, the pressure value and preset second that controller 4 is detected according to relative pressure sensor 6 are opened
Value, the second close value control vacuum pump 1；
When controller 4 get the voltage value of relative pressure sensor 6 not within a preset range, voltage value be 0 or phase
When to 6 short circuit of pressure sensor, the pressure value and preset third that controller 4 is detected according to absolute pressure transducer 5 are opened
Value, third close value control vacuum pump 1.
Optionally, when controller 4 gets absolute pressure transducer 5 and relative pressure sensor 6 while failing, control
Device 4 uses work first time period, then stops the opening and closing of the mode continuous control vacuum pump 1 of second time period.The
One unlatching value, the first close value, the second unlatching value, the second close value, third unlatching value and third close value, pass through Different Altitude
Height calibration obtains.
The present embodiment solve in the prior art using a B/P EGR Back Pressure Transducer EGR controlled when, various height above sea level can not be carried out
The beginning and closing control of vacuum pump, will lead to vacuum pump long-term work when running car is in altitude environment, burn out under height
Vacuum pump and vacuum line, and when B/P EGR Back Pressure Transducer EGR failure after can not be controlled according to air pressure the technical issues of, also solve
Using can lead caused by barometric pressure sensor and a B/P EGR Back Pressure Transducer EGR control when barometric pressure sensor failure
The technical issues of cause can not use under various height above sea levels.The present embodiment makes absolute pressure transducer 5, relative pressure sensor
6 are mutually backups control, and when a failure, another still is able to acquisition data, and controller 4 is enable more reasonably to control very
Sky pump, will not make vacuum pump long-term work, vacuum pump is avoided to damage.
In one of them embodiment, when the pressure value that relative pressure sensor 6 detects is equal with the second unlatching value
When, then controller 4 is powered to vacuum pump 1, vacuum chamber pumping of the vacuum pump 1 to vacuum tank 9 and booster 7；When relative pressure passes
When the pressure value that sensor 6 detects is equal with the second close value, then controller 4 stops powering to vacuum pump 1.
In one of them embodiment, when the pressure value that absolute pressure transducer 5 detects is equal with third unlatching value
When, then controller 4 is powered to vacuum pump 1, vacuum chamber pumping of the vacuum pump 1 to vacuum tank 9 and booster 7；When absolute pressure passes
When the pressure value that sensor 5 detects is equal with third close value, then controller 4 stops powering to vacuum pump 1.
By providing the second unlatching value, third unlatching value, the second close value and the third close value of calibration, make controller 4
It can continue to accurately control vacuum pump 1.The present embodiment make when absolute pressure transducer 5 and relative pressure sensor 6 any one
When failure, controller 4 can normal control vacuum pump 1 switch.
Above-described is only the principle of the present invention and preferred embodiment.It should be pointed out that for the common skill of this field
For art personnel, on the basis of the principle of the invention, several other modifications can also be made, also should be regarded as protection model of the invention
It encloses.
Claims (10)
1. a kind of electronic vacuum pump control system characterized by comprising
It is vacuum pump, power supply, solenoid valve, controller, absolute pressure transducer, relative pressure sensor, vacuum booster, unidirectional
Valve, vacuum line and vacuum tank；
Three ends of solenoid valve are connect with the first end of the first end of vacuum pump, the anode of power supply and controller respectively, vacuum pump
Second end connection power supply cathode, the second end of controller and third end are separately connected vacuum booster and vacuum tank, vacuum
Pipeline is equipped between booster and vacuum tank, absolute pressure transducer is arranged on vacuum tank, and relative pressure sensor setting exists
On vacuum booster, check valve is arranged in the vacuum line between vacuum booster and vacuum tank；
When the pressure value in vacuum booster is equal to the first unlatching value, controller is powered to vacuum pump, and vacuum pump is to vacuum tank
With the vacuum chamber pumping of vacuum booster；When the pressure value in vacuum booster is equal to the first close value, controller stops work
Make.
2. electronic vacuum pump control system according to claim 1, which is characterized in that
When controller get the voltage value of absolute pressure transducer not within a preset range, voltage value be 0 or absolute pressure
When short circuit sensor, pressure value and preset second unlatching value, the second pass that controller is detected according to relative pressure sensor
Close value control vacuum pump.
3. electronic vacuum pump control system according to claim 2, which is characterized in that
When the pressure value that relative pressure sensor detects is equal with the second unlatching value, then controller is powered to vacuum pump, very
Vacuum chamber pumping of the sky pump to vacuum tank and booster；When the pressure value that relative pressure sensor detects and the second close value phase
Whens equal, then controller stops powering to vacuum pump.
4. electronic vacuum pump control system according to claim 1, which is characterized in that
When controller get the voltage value of relative pressure sensor not within a preset range, voltage value be 0 or relative pressure
When short circuit sensor, pressure value and preset third unlatching value, third pass that controller is detected according to absolute pressure transducer
Close value control vacuum pump.
5. electronic vacuum pump control system according to claim 4, which is characterized in that
When the pressure value that absolute pressure transducer detects is equal with third unlatching value, then controller is powered to vacuum pump, very
Vacuum chamber pumping of the sky pump to vacuum tank and booster；When the pressure value that absolute pressure transducer detects and third close value phase
Whens equal, then controller stops powering to vacuum pump.
6. electronic vacuum pump control system according to claim 1, which is characterized in that
First unlatching value and the first close value demarcate to obtain by different altitude height.
7. electronic vacuum pump control system according to any one of claims 1 to 6, which is characterized in that
When controller gets absolute pressure transducer and relative pressure sensor while failing, controller uses work first
Then period stops the opening and closing of the mode continuous control vacuum pump of second time period.
8. a kind of control method of electronic vacuum pump characterized by comprising
When the pressure value in vacuum booster is equal to the first unlatching value, controller is powered to vacuum pump, and vacuum pump is to vacuum tank
With the vacuum chamber pumping of booster；When the pressure value in vacuum booster is equal to the first close value, controller stops working；
When controller get the voltage value of absolute pressure transducer not within a preset range, voltage value be 0 or absolute pressure
When short circuit sensor, pressure value and preset second unlatching value, the second pass that controller is detected according to relative pressure sensor
Close value control vacuum pump；
When controller get the voltage value of relative pressure sensor not within a preset range, voltage value be 0 or relative pressure
When short circuit sensor, pressure value and preset third unlatching value, third pass that controller is detected according to absolute pressure transducer
Close value control vacuum pump.
9. the control method of electronic vacuum pump according to claim 8, which is characterized in that
When the pressure value that relative pressure sensor detects is equal with the second unlatching value, then controller is powered to vacuum pump, very
Vacuum chamber pumping of the sky pump to vacuum tank and booster；When the pressure value that relative pressure sensor detects and the second close value phase
Whens equal, then controller stops powering to vacuum pump.
10. the control method of electronic vacuum pump according to claim 8 or claim 9, which is characterized in that
When the pressure value that absolute pressure transducer detects is equal with third unlatching value, then controller is powered to vacuum pump, very
Vacuum chamber pumping of the sky pump to vacuum tank and booster；When the pressure value that absolute pressure transducer detects and third close value phase
Whens equal, then controller stops powering to vacuum pump.
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| CN109849884A (en) * | 2019-02-22 | 2019-06-07 | 威马智慧出行科技（上海）有限公司 | Automotive electronics vacuum method for controlling pump and electronic equipment |
| CN111257596A (en) * | 2020-02-25 | 2020-06-09 | 西南交通大学 | Scanning probe microscope narrow and small experiment chamber environment atmosphere accurate control device |
| CN112519738A (en) * | 2019-09-18 | 2021-03-19 | 广州汽车集团股份有限公司 | Vacuum-assisted brake system, brake control method, and brake control apparatus |
| CN112757181A (en) * | 2019-10-21 | 2021-05-07 | 富鼎电子科技(嘉善)有限公司 | Adsorption control device and product adsorption device |
| CN114620018A (en) * | 2020-12-14 | 2022-06-14 | 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 device |
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