CN109763971A - A kind of shifting control method, system and vehicle - Google Patents
A kind of shifting control method, system and vehicle Download PDFInfo
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- CN109763971A CN109763971A CN201910067267.5A CN201910067267A CN109763971A CN 109763971 A CN109763971 A CN 109763971A CN 201910067267 A CN201910067267 A CN 201910067267A CN 109763971 A CN109763971 A CN 109763971A
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Abstract
The present invention relates to a kind of shifting control method, system and vehicles, the shifting control method is used for the real-time speed Control of full-vehicle control electric compressor, actual condition adjust automatically electric compressor operation when including combining the parameter of electric machine setting compressor operation parameter of electric compressor, running in conjunction with vehicle, further includes monitoring and judging vehicle air pressure signal in real time；The invention also includes change control system corresponding with the shifting control method and with the vehicle of the change control system.Technical solution of the present invention, which has, combines vehicle practical operation situation to carry out electric compressor real-time control, can be realized the beneficial effect that same money air compressor machine meets different automobile types demand.
Description
Technical field
The present invention relates to vehicle control system technical fields, and in particular to a kind of shifting control method, system and vehicle, especially
It is related to a kind of shifting control method for full-vehicle control electric compressor, speed Control corresponding with the shifting control method
System and vehicle with the change control system.
Background technique
Automobile air compressor is mainly used for automobile brake technology, suspension, car door opening is closed and auxiliary gas
Dynamic device provides necessary gas source.
Publication No. provides a kind of electric compressor and steering pump for the Chinese invention patent application of CN108238044A
Control system, including ECU controller, electric machine controller, arrangement of clutch, air compressor machine, driving motor and power assistance pump for steering, ECU control
Device processed can receive wheel speed signal and braking system air pressure signal, ECU controller can issue motor speed enable signal and from
Enable signal is closed, arrangement of clutch operates so that air compressor machine and driving motor separation or combination, electric machine controller control driving motor
Running speed, then control air compressor machine and power assistance pump for steering working condition；The program pumps electric powered steering and electronic pneumatics
Machine manufacture is integrated, and reduces space occupied.
Full-vehicle control electric compressor control mode at present is that control is at the uniform velocity operated using motor, such operating control
Mode can not carry out real-time control in conjunction with practical operation situation, and cannot achieve same money air compressor machine and meet the needs of different automobile types,
To realize above-mentioned requirements, a kind of control method of variable-ratio control is specially designed.
Summary of the invention
It can not be carried out in fact in conjunction with practical operation situation for the control mode of full-vehicle control electric compressor in the prior art
When control, cannot achieve the technological deficiency problem that same money air compressor machine meets the needs of different automobile types, the present invention provides a kind of changes
Speed control method, system and vehicle realize the variable speed controllable adjustment of full-vehicle control electric compressor.
To achieve the goals above, the present invention adopts the following technical scheme that.
The present invention provides a kind of shifting control method, and this method is used for the real-time speed change control of full-vehicle control electric compressor
System, comprising:
In conjunction with the parameter of electric machine of electric compressor, compressor operation parameter is set；
Actual condition adjust automatically electric compressor operation when in conjunction with vehicle operation.
Preferably, shifting control method further include: monitor and judge vehicle air pressure signal in real time.
In any of the above-described technical solution preferably, the parameter of electric machine setting air compressor machine of the combination electric compressor is transported
Row parameter, comprising: when vehicle is debugged, configure the first of the parameter setting compressor operation parameter of motor in conjunction with electric compressor
Beginning parameter.
In any of the above-described technical solution preferably, when the compressor operation parameter includes: unit time Z, operation
Between the total number of run N of air compressor machine and compressor operation frequency in air compressor machine single number of run n, unit time Z in T, unit time Z
Rate A.
In any of the above-described technical solution preferably, the compressor operation frequency A includes the initial frequency of compressor operation
Rate A1.
In any of the above-described technical solution preferably, the running time T includes air compressor machine single operation maximum duration
T2 and air compressor machine single run shortest time T3.
In any of the above-described technical solution preferably, air compressor machine single number of run n includes sky in the unit time Z
The frequency n 2 that press frequency n 1 of running time T < T3 occurs, running time T > T2 occurs.
In any of the above-described technical solution preferably, the total number of run N of air compressor machine includes total fortune in the unit time Z
Row number lower limit N1 and total number of run upper limit N2.
In any of the above-described technical solution preferably, the actual condition adjust automatically when combination vehicle is run is electronic
Compressor operation, comprising: after vehicle powers on, default compressor operation frequency is suitable for the first time, does not do any judgement；Vehicle powers on
Afterwards, first time compressor operation terminates, and air compressor machine starts to carry out the speed governing operation in the unit time；When speed governing operation air compressor machine,
Air compressor machine single number of run n and the total number of run N of air compressor machine are monitored in unit time Z not in the upper limit of setting and lower limit
In range, then alarm on vehicle.
In any of the above-described technical solution preferably, described to monitor and judge vehicle air pressure signal in real time, comprising: vehicle
After powering on, vehicle air pressure is monitored in real time, and judge vehicle air pressure signal P.
In any of the above-described technical solution preferably, the vehicle air pressure signal P includes vehicle air pressure lower limit P1, vehicle
Air pressure upper limit P2.
In any of the above-described technical solution preferably, the compressor operation frequency A further includes compressor operation frequency
Promote A2, compressor operation frequency reduces A3.
In any of the above-described technical solution preferably, the actual condition adjust automatically when combination vehicle is run is electronic
Compressor operation, further includes: full-vehicle control electric compressor adjust automatically compressor operation frequency A in speed Control, in advance
Compressor operation frequency A is stored, and compressor operation frequency upgrading A2/ compressor operation frequency reduction A3 should be in electronic pneumatics
Machine configures in the controlled range of motor.
In any of the above-described technical solution preferably, the compressor operation frequency A setting, which increases, removes compressor operation
Original frequency A1, compressor operation frequency upgrading A2, compressor operation frequency reduce multiple frequency gears except A3, when unit
Between Z, running time T, in unit time Z in air compressor machine single number of run n, unit time Z the total number of run N of air compressor machine it is upper
Limit and lower limit, which are done, accordingly to be adjusted.
Matchingly with the above method, the present invention also provides a kind of change control systems.
Change control system provided by the invention, the real-time speed Control for full-vehicle control electric compressor, comprising:
Parameter set unit, for combining the parameter of electric machine of electric compressor that compressor operation parameter is arranged；
Controller unit, for combining actual condition adjust automatically electric compressor operation when vehicle operation.
In any of the above-described technical solution preferably, the change control system further include: air pressure detecting unit, for real
When monitor and judge vehicle air pressure signal.
In any of the above-described technical solution preferably, the parameter set unit, for combining the electricity of electric compressor
Machine parameter setting compressor operation parameter, comprising: when vehicle is debugged, in conjunction with the parameter setting of electric compressor configuration motor
The initial parameter of compressor operation parameter.
In any of the above-described technical solution preferably, when the compressor operation parameter includes: unit time Z, operation
Between the total number of run N of air compressor machine and compressor operation frequency in air compressor machine single number of run n, unit time Z in T, unit time Z
Rate A.
In any of the above-described technical solution preferably, the compressor operation frequency A includes the initial frequency of compressor operation
Rate A1.
In any of the above-described technical solution preferably, the running time T includes air compressor machine single operation maximum duration
T2 and air compressor machine single run shortest time T3.
In any of the above-described technical solution preferably, air compressor machine single number of run n includes sky in the unit time Z
The frequency n 2 that press frequency n 1 of running time T < T3 occurs, running time T > T2 occurs.
In any of the above-described technical solution preferably, the total number of run N of air compressor machine includes total fortune in the unit time Z
Row number lower limit N1 and total number of run upper limit N2.
In any of the above-described technical solution preferably, the controller unit, for combining reality when vehicle operation
Operating condition adjust automatically electric compressor operation, comprising: after vehicle powers on, default compressor operation frequency is suitable for the first time, does not do
Any judgement；After vehicle powers on, first time compressor operation terminates, and air compressor machine starts to carry out the speed governing operation in the unit time；
When speed governing operation air compressor machine, air compressor machine single number of run n and the total number of run N of air compressor machine are monitored in unit time Z not
In the upper limit and lower range of setting, then alarm on vehicle.
In any of the above-described technical solution preferably, the air pressure detecting unit, for monitoring and judging vehicle in real time
Air pressure signal, comprising: after vehicle powers on, monitor vehicle air pressure in real time, and judge vehicle air pressure signal P.
In any of the above-described technical solution preferably, the vehicle air pressure signal P includes vehicle air pressure lower limit P1, vehicle
Air pressure upper limit P2.
In any of the above-described technical solution preferably, the compressor operation frequency A further includes compressor operation frequency
Promote A2, compressor operation frequency reduces A3.
In any of the above-described technical solution preferably, the controller unit, for combining reality when vehicle operation
Operating condition adjust automatically electric compressor operation, further includes: full-vehicle control electric compressor adjust automatically pneumatics in speed Control
Machine running frequency A, compressor operation frequency A are stored in advance to controller unit, and compressor operation frequency upgrading A2/ pneumatics
Machine running frequency reduces A3 should be in the controlled range that electric compressor configures motor.
In any of the above-described technical solution preferably, the compressor operation frequency A setting, which increases, removes compressor operation
Original frequency A1, compressor operation frequency upgrading A2, compressor operation frequency reduce multiple frequency gears except A3, when unit
Between Z, running time T, in unit time Z in air compressor machine single number of run n, unit time Z the total number of run N of air compressor machine it is upper
Limit and lower limit, which are done, accordingly to be adjusted.
Matchingly with above system, the present invention also provides a kind of vehicle, which includes electric compressor；The vehicle
It is provided with change control system as described above, runs actual condition, the motor fortune of adjust automatically electric compressor in conjunction with vehicle
Line frequency.
The present invention can not combine practical operation situation for the control mode of full-vehicle control electric compressor in the prior art
It carries out real-time control, cannot achieve the technological deficiency problem that same money air compressor machine meets the needs of different automobile types, provide a kind of use
In the shifting control method of full-vehicle control electric compressor, change control system corresponding with the shifting control method and have
The vehicle of the change control system.Compared with prior art, above-mentioned technical proposal of the invention has the following beneficial effects: speed change
Actual condition when control method can be in conjunction with vehicle operation, the motor operation frequency of adjust automatically electric compressor, to reduce
Revolving speed realizes the effect of a air compressor machine matching various, and vehicle factor is without carrying out repeatedly matching air compressor machine.Pass through speed change tune
It is whole, the air compressor machine work frequency can be made to guarantee in range of set value, the use rate of load condensate of air compressor machine is controlled, ensure that
The service life of air compressor machine.It, can adjust automatically frequency when causing efficiency to reduce when appearance abrasion is excessive during compressor operation
Rate, and then ensure vehicle gas demand.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the control strategy schematic diagram of a preferred embodiment of shifting control method according to the invention；
Fig. 2 is the speed Control schematic diagram of the embodiment illustrated in fig. 1 of shifting control method according to the invention；
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to overcome full-vehicle control electric compressor in the prior art control mode can not in conjunction with practical operation situation into
Row real-time control cannot achieve the technological deficiency problem that same money air compressor machine meets the needs of different automobile types, and the embodiment of the present invention mentions
A kind of shifting control method out is realized and is met with money air compressor machine for the real-time speed Control of full-vehicle control electric compressor
The demand of different automobile types.Corresponding with the shifting control method, the embodiment of the present invention also proposed a kind of change control system
And the vehicle with the change control system.
When vehicle is debugged, initial parameter, electronic pneumatics need to be configured in conjunction with the parameter of electric machine of electric compressor
Machine carries out speed Control: after vehicle powers on, monitoring vehicle air pressure in real time, and judge vehicle air pressure signal；Vehicle powers on
First time default compressor operation frequency afterwards is suitable, does not do any judgement；Air compressor machine starts to carry out the speed regulating control time, is whole
Vehicle, which powers on rear first time compressor operation, to be terminated to start；Controller in speed Control, can adjust automatically frequency, Ying Tiqian exists
Storage in controller, and frequency upgrading/reduction should be in the controlled range that electric compressor configures motor；Control strategy such as Fig. 1
It is shown, according to the shifting control method for full-vehicle control electric compressor of the present embodiment of the control strategy, comprising:
In conjunction with the parameter of electric machine of electric compressor, compressor operation parameter is set；
Actual condition adjust automatically electric compressor operation when in conjunction with vehicle operation；
And it can also include: real time monitoring and judge vehicle air pressure signal.
Wherein: the parameter of electric machine setting compressor operation parameter in conjunction with electric compressor may include: that vehicle is debugged
When, in conjunction with the initial parameter of the parameter setting compressor operation parameter of electric compressor configuration motor.
Actual condition adjust automatically electric compressor operation when in conjunction with vehicle operation may include: after vehicle powers on, the
Primary default compressor operation frequency is suitable, does not do any judgement；After vehicle powers on, first time compressor operation terminates, pneumatics
Machine starts to carry out the speed governing operation in the unit time；When speed governing operation air compressor machine, monitors air compressor machine single in the unit time and transport
Row number and the total number of run of air compressor machine not in the upper limit and lower range of setting, are then alarmed on vehicle.
It monitors in real time and judges that vehicle air pressure signal may include: to monitor vehicle air pressure in real time, and to whole after vehicle powers on
Vehicle air pressure signal is judged.
The shifting control method of the present embodiment is described in detail below in conjunction with Fig. 2.
Illustrate the parameter that the control mode of full-vehicle control electric compressor is related to first:
Compressor operation parameter include unit time Z, running time T, air compressor machine single number of run n in unit time Z,
The total number of run N of air compressor machine, compressor operation frequency A in unit time Z；
Compressor operation frequency A: compressor operation original frequency A1, compressor operation frequency upgrading A2, compressor operation
Frequency reduces A3；
Running time T: air compressor machine single runs maximum duration T2, air compressor machine single runs shortest time T3；
Air compressor machine single number of run n in unit time Z: there is the frequency n 1 of running time T < T3, transports in air compressor machine
The frequency n 2 of row time T > T2；
The total number of run N of air compressor machine in unit time Z: total number of run lower limit N1, total number of run upper limit N2；
Vehicle air pressure signal P: vehicle air pressure lower limit P1, vehicle air pressure upper limit P2.
When vehicle is debugged, need to configure the parameter of motor in conjunction with electric compressor compressor operation parameter is arranged
Initial parameter, wherein setting compressor operation original frequency be A1.
Carry out electric compressor speed Control:
After vehicle powers on, vehicle air pressure is monitored in real time, and judge vehicle air pressure signal P；
First time default compressor operation frequency after vehicle powers on is suitable, does not do any judgement；
Air compressor machine starts to carry out the speed governing operation in the unit time, this is the first time compressor operation after vehicle powers on
After start；
Controller full-vehicle control electric compressor carry out speed Control when, can adjust automatically compressor operation frequency A, answer
Compressor operation frequency A is stored in controller in advance, and compressor operation frequency upgrading A2/ compressor operation frequency reduces
A3 should be in the controlled range that electric compressor configures motor.
During the speed Control of full-vehicle control electric compressor, the gear of compressor operation frequency A can be set more
It is a, that is, compressor operation original frequency A1, the compressor operation frequency upgrading A2, compressor operation that can be not limited in Fig. 2
Three frequency gears of frequency reduction A3.But if frequency gear increases, parameter " unit time Z, fortune are accordingly set
The total number of run N " of air compressor machine in air compressor machine single number of run n, unit time Z in row time T, unit time Z, to these ginsengs
Several upper and lower bounds adjust accordingly.
After by the motor of electric compressor adjustment frequency and then adjusting revolving speed, when compressor operation, unit is monitored
The air compressor machine single number of run n and total number of run N of air compressor machine is not in the upper limit and lower range of setting in time Z, then
It need to alarm on vehicle.
Shifting control method provided in this embodiment, actual condition when can be run in conjunction with vehicle, the electronic sky of adjust automatically
The motor operation frequency of press realizes the effect of a air compressor machine matching various to reduce revolving speed, vehicle factor be not necessarily into
Row repeatedly matches air compressor machine.It is adjusted by speed change, the air compressor machine work frequency can be made to guarantee in range of set value, control sky
The use rate of load condensate of press, ensures that the service life of air compressor machine.During compressor operation, when occur abrasion it is excessive and
When efficiency being caused to reduce, can adjust automatically frequency, and then ensure vehicle gas demand.
According to the shifting control method of the present embodiment, a kind of change control system is also provided, which includes:
Parameter set unit, for combining the parameter of electric machine of electric compressor that compressor operation parameter is arranged；
Controller unit, for combining actual condition adjust automatically electric compressor operation when vehicle operation；
And can also include: air pressure detecting unit, for monitoring and judging vehicle air pressure signal in real time.
Specifically: parameter set unit, for combining the parameter of electric machine of electric compressor that compressor operation parameter, packet is arranged
It includes when vehicle is debugged, in conjunction with the initial parameter of the parameter setting compressor operation parameter of electric compressor configuration motor
" unit time Z, running time T, air compressor machine is always run time in air compressor machine single number of run n, unit time Z in unit time Z
Number N and compressor operation frequency A, vehicle air pressure signal P ", and also setting up parameter includes compressor operation original frequency A1, sky
Press running frequency promotes A2, compressor operation frequency reduces A3, air compressor machine single operation maximum duration T2, air compressor machine single fortune
Air compressor machine occurs that the frequency n 1 of running time T < T3, air compressor machine occurs in unit time Z in row shortest time T3, unit time Z
Air compressor machine is always transported in the total number of run lower limit N1 of air compressor machine, unit time Z in the frequency n 2 of running time T > T2, unit time Z
Row maximum number of times N2, vehicle air pressure lower limit P1, vehicle air pressure upper limit P2.
Controller unit, for combining actual condition adjust automatically electric compressor operation when vehicle operation, comprising: whole
After vehicle powers on, default compressor operation frequency is suitable for the first time, does not do any judgement；After vehicle powers on, first time air compressor machine fortune
Row terminates, and air compressor machine starts to carry out the speed governing operation in the unit time；When speed governing operation air compressor machine, monitor in unit time Z
The air compressor machine single number of run n and total number of run N of air compressor machine is not in the upper limit and lower range of setting, then on vehicle
Alarm.
Air pressure detecting unit, for monitoring and judging vehicle air pressure signal in real time, comprising: after vehicle powers on, real time monitoring
Vehicle air pressure, and vehicle air pressure signal P is judged.
Controller unit further include: full-vehicle control electric compressor adjust automatically compressor operation frequency in speed Control
A, compressor operation frequency A are stored in advance to controller unit, and compressor operation frequency upgrading A2/ compressor operation frequency
Reducing A3 should be in the controlled range that electric compressor configures motor.
Compressor operation frequency A setting, which increases, removes compressor operation original frequency A1, compressor operation frequency upgrading A2, sky
Press running frequency reduces multiple frequency gears except A3, unit time Z, running time T, air compressor machine list in unit time Z
The upper and lower bound of the total number of run N of air compressor machine, which is done, in secondary number of run n, unit time Z accordingly adjusts.
Change control system provided in this embodiment, actual condition when can be run in conjunction with vehicle, the electronic sky of adjust automatically
The motor operation frequency of press realizes the effect of a air compressor machine matching various to reduce revolving speed, vehicle factor be not necessarily into
Row repeatedly matches air compressor machine.It is adjusted by speed change, the air compressor machine work frequency can be made to guarantee in range of set value, control sky
The use rate of load condensate of press, ensures that the service life of air compressor machine.During compressor operation, when occur abrasion it is excessive and
When efficiency being caused to reduce, can adjust automatically frequency, and then ensure vehicle gas demand.
According to the change control system of the present embodiment, a kind of vehicle is also provided, which includes electric compressor, the vehicle
It is additionally provided with change control system as described above, runs actual condition, the motor of adjust automatically electric compressor in conjunction with vehicle
Running frequency.
The above is only that preferred embodiments of the present invention will be described, is limited the scope of the present invention
It is fixed；The foregoing is merely a specific embodiment of the invention, are not intended to limit the scope of protection of the present invention；It is not departing from
Under the premise of design spirit of the present invention, this field ordinary engineering and technical personnel any is repaired to what technical solution of the present invention was made
Change, equivalent replacement, improvement etc., should fall within the scope of protection determined by the claims of the present invention.
Claims (10)
1. a kind of shifting control method, the real-time speed Control for full-vehicle control electric compressor, which is characterized in that this method
Include:
In conjunction with the parameter of electric machine of electric compressor, compressor operation parameter is set；
Actual condition adjust automatically electric compressor operation when in conjunction with vehicle operation.
2. shifting control method as described in claim 1, which is characterized in that this method further include:
Monitor and judge vehicle air pressure signal in real time.
3. shifting control method as described in claim 1, which is characterized in that the parameter of electric machine of the combination electric compressor is set
Empty press operating parameter, comprising: when vehicle is debugged, in conjunction with the parameter setting air compressor machine fortune of electric compressor configuration motor
The initial parameter of row parameter.
4. shifting control method as claimed in claim 3, which is characterized in that when the compressor operation parameter includes: unit
Between Z, running time T, the total number of run N of air compressor machine and sky in air compressor machine single number of run n, unit time Z in unit time Z
Press running frequency A.
5. shifting control method as claimed in claim 4, which is characterized in that the compressor operation frequency A includes air compressor machine
Run original frequency A1.
6. shifting control method as claimed in claim 4, which is characterized in that the running time T includes air compressor machine single fortune
Row maximum duration T2 and air compressor machine single run shortest time T3.
7. shifting control method as claimed in claim 4, which is characterized in that air compressor machine single is run in the unit time Z
Frequency n includes the frequency n 2 that air compressor machine frequency n 1 of running time T < T3 occurs, running time T > T2 occurs.
8. shifting control method as claimed in claim 4, which is characterized in that air compressor machine always runs secondary in the unit time Z
Number N includes total number of run lower limit N1 and total number of run upper limit N2.
9. a kind of change control system, the real-time speed Control for full-vehicle control electric compressor, which is characterized in that the system
Include:
Parameter set unit, for combining the parameter of electric machine of electric compressor that compressor operation parameter is arranged；
Controller unit, for combining actual condition adjust automatically electric compressor operation when vehicle operation.
10. a kind of vehicle, including electric compressor, which is characterized in that vehicle setting is just like any one of claim 17 to 32
The change control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910067267.5A CN109763971B (en) | 2019-01-24 | 2019-01-24 | Speed change control method and system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910067267.5A CN109763971B (en) | 2019-01-24 | 2019-01-24 | Speed change control method and system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN109763971A true CN109763971A (en) | 2019-05-17 |
| CN109763971B CN109763971B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910067267.5A Active CN109763971B (en) | 2019-01-24 | 2019-01-24 | Speed change control method and system and vehicle |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090254246A1 (en) * | 2008-04-02 | 2009-10-08 | International Truck Intellectual Property Company, Llc | Method and apparatus to optimize energy efficiency of air compressor in vehicle air brake application |
| CN101672271A (en) * | 2009-10-19 | 2010-03-17 | 乐普四方（北京）节能技术有限公司 | Air compressor energy-saving controller with constant pressure and dormancy and control method |
-
2019
- 2019-01-24 CN CN201910067267.5A patent/CN109763971B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090254246A1 (en) * | 2008-04-02 | 2009-10-08 | International Truck Intellectual Property Company, Llc | Method and apparatus to optimize energy efficiency of air compressor in vehicle air brake application |
| CN101672271A (en) * | 2009-10-19 | 2010-03-17 | 乐普四方（北京）节能技术有限公司 | Air compressor energy-saving controller with constant pressure and dormancy and control method |
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| Publication number | Publication date |
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| CN109763971B (en) | 2021-01-01 |
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