CN111853323A - Control system and method for electromagnetic valve - Google Patents
Control system and method for electromagnetic valve Download PDFInfo
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- CN111853323A CN111853323A CN201910351540.7A CN201910351540A CN111853323A CN 111853323 A CN111853323 A CN 111853323A CN 201910351540 A CN201910351540 A CN 201910351540A CN 111853323 A CN111853323 A CN 111853323A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
Abstract
The invention provides a solenoid valve control system and a method, which comprises the steps of firstly obtaining a soft landing correction current curve under a target working condition, then correcting an initial target current curve according to the soft landing correction current curve to obtain a required target current curve, sending a required target current control signal according to the required target current curve, detecting actual current flowing through a solenoid valve in real time, comparing the actual current with the required target current curve, correcting the required target current control signal if the actual current is inconsistent with the required target current corresponding to the target current curve at the same moment, and controlling the start and stop of the solenoid valve through the corrected required target current control signal. The final current control signal is obtained by soft landing correction operation and comparison correction through real-time detection of actual current flowing through the electromagnetic valve, so that the soft landing of the electromagnetic valve can be always ensured.
Description
Technical Field
The invention relates to the technical field of electromagnetic valve control, in particular to an electromagnetic valve control system and method.
Background
Solenoid valves are widely used in the industry, for example, in the automotive industry, such as carbon canister control valves, variable valve timing control valves, variable valve lift control valves, secondary air control valves, oil pump control solenoid valves, and fuel injection valves, which are commonly used in engines.
As shown in fig. 1, the basic structure of the solenoid valve comprises a housing 1, a coil 2, an iron core 3, a spring 4 and a needle valve assembly 5, wherein the coil 2 is sleeved outside the iron core 3. The working principle of the electromagnetic valve is as follows: after the coil is electrified, electromagnetic force is formed in the coil 2, the needle valve assembly 5 is sucked up, and the electromagnetic valve is opened; after the coil 2 is powered off, the needle valve assembly 5 returns to the initial position under the action of the elastic force of the spring 4, and the electromagnetic valve is closed.
The control of the current type solenoid valve is to control the start and stop of the solenoid valve by applying a certain current. The opening and the opening duration of the needle valve assembly 5 are controlled by applying a certain current to the solenoid valve coil 2, and the opening and the closing of the solenoid valve are controlled by the magnitude and the duration of the current applied to the coil 2, and the movement process of the needle valve assembly 5 is a function of the current flowing through the coil 2.
Fig. 2 illustrates the current I over time T for a conventional solenoid current control scheme. In the opening stage, the current is controlled to be quickly increased to the target current, so that the stroke is quickly increased to the maximum stroke and collides with the end stop, the stroke is stable after certain oscillation, and the electromagnetic valve is completely opened; and in the closing stage, the control current is rapidly reduced to zero, the needle valve assembly 5 is rapidly returned under the action of spring force, the stroke is rapidly reduced to the minimum stroke, the end stop is impacted, and the electromagnetic valve is closed after certain oscillation.
In engineering applications, it is generally required that the solenoid valve opens immediately upon application of current to the coil 2, and closes immediately after the coil 2 is de-energized. Due to the rapid opening and closing of the solenoid, the needle assembly 5 will strike both ends of the needle assembly 5 inside the solenoid, respectively. As shown in fig. 3, at the end of the stroke when the solenoid is opened and closed, the needle valve assembly 5 hits the internal stop of the solenoid, and the stroke stops abruptly, exhibiting some oscillation due to the impact.
When the solenoid valve is opened or closed, the needle valve assembly 5 impacts the inner stop end hard and lively, damage to the inner stop end can be accelerated, strong impact sound can be brought, and stroke oscillation caused by hard impact can even bring unstable operation of the solenoid valve.
Disclosure of Invention
The invention aims to provide a solenoid valve control system and a solenoid valve control method so as to realize soft landing of a solenoid valve.
In order to solve the above technical problem, the present invention provides a method for controlling an electromagnetic valve, including:
obtaining a soft landing correction current curve of an electromagnetic valve under a target working condition;
correcting the initial target current curve of the electromagnetic valve according to the soft landing correction current curve to obtain a required target current curve;
Sending out a demand target current control signal according to the demand target current curve, an
And detecting the actual current flowing through the electromagnetic valve in real time, comparing the actual current with the required target current curve, and controlling the starting and stopping of the electromagnetic valve by correcting the required target current control signal so as to realize soft landing of the electromagnetic valve.
Optionally, in the method for controlling an electromagnetic valve, obtaining a soft landing correction current curve of the electromagnetic valve under a target working condition includes:
obtaining a functional relation between the soft landing correction current of the needle valve assembly of the solenoid valve and a plurality of influence factors;
detecting each influence factor under the target working condition;
and obtaining the soft landing correction current curve according to the detected influence factors and the functional relation.
Optionally, in the solenoid valve control method, a functional relationship between a soft landing correction current of a needle valve assembly of the solenoid valve and a plurality of influence factors is obtained through an offline test, where the offline test includes:
setting a plurality of groups of influence factors, and carrying out start-stop test on an electromagnetic valve under each group of influence factors;
Setting the soft landing correction current according to the operating condition of a needle valve assembly of the electromagnetic valve for performing the start-stop test;
and integrating the plurality of groups of influence factors and the soft landing correction current set corresponding to each group of influence factors to obtain the functional relation between the soft landing correction current and the plurality of influence factors.
Optionally, in the solenoid valve control method, the influence factor includes: the pressure difference between two ends of the needle valve component of the electromagnetic valve and the environment temperature of the electromagnetic valve.
Optionally, in the solenoid valve control method, the soft landing correction current curve, the initial target current curve, and the required target current curve are curves of current changing with time.
Optionally, in the electromagnetic valve control method, a current value corresponding to the soft landing correction current curve is a negative value in an electromagnetic valve opening stage and is a positive value in an electromagnetic valve closing stage.
Optionally, in the electromagnetic valve control method, at the same time, the current value corresponding to the initial target current curve and the current value corresponding to the soft landing correction current curve are added to obtain the current value corresponding to the required target current curve.
Optionally, in the electromagnetic valve control method, the initial target current curve is calculated according to a target opening applied to the electromagnetic valve.
The present invention also provides a solenoid valve control system for controlling a solenoid valve, the solenoid valve control system comprising: the device comprises a control module, an influence factor detection module and a current detection module;
the influence factor detection module detects a plurality of influence factors under a target working condition and sends a detection result to the control module;
the control module obtains a soft landing correction current curve according to the detection result of the influence factor detection module, corrects an initial target current curve according to the soft landing correction current curve to obtain a required target current curve, and sends a required target current control signal according to the required target current curve;
the current detection module detects the actual current flowing through the electromagnetic valve and sends a detection result to the control module;
and the control module corrects the required target current control signal according to the detection result of the influence factor detection module, so that the on-off of the electromagnetic valve is controlled through the corrected required target current control signal to enable the electromagnetic valve to be in soft landing.
Optionally, in the solenoid valve control system, the influence factor includes: the pressure difference between two ends of the solenoid valve needle valve component and the environment temperature of the solenoid valve.
Optionally, in the solenoid valve control system, a functional relationship between the soft landing correction current of the solenoid valve needle valve assembly and the plurality of influence factors is stored in the control module, and the control module obtains the soft landing correction current curve according to the functional relationship and the detection result of the influence factor detection module.
Optionally, in the electromagnetic valve control system, the electromagnetic valve control system further includes a current-voltage conversion module and a driving stage switch, the current-voltage conversion module converts a current control signal sent by the control module into a voltage control signal, and the voltage control signal is used to control the opening and closing of the driving stage switch to control the starting and stopping of the electromagnetic valve.
Optionally, in the electromagnetic valve control system, the driver switch is a metal-oxide semiconductor field effect transistor or an equivalent electronic switch of the metal-oxide semiconductor field effect transistor.
Optionally, in the electromagnetic valve control system, a gate of the driving stage switching tube is connected to the current-voltage conversion module, a source of the driving stage switching tube is connected to the current detection module, and a drain of the driving stage switching tube is connected to the electromagnetic valve.
The invention provides a solenoid valve control system and a method, wherein a soft landing correction current curve under a target working condition is obtained, an initial target current curve is corrected according to the soft landing correction current curve to obtain a required target current curve, a required target current control signal is sent according to the required target current curve, real-time detection is carried out on actual current flowing through a solenoid valve, the actual current is compared with the required target current curve, if the actual current is not consistent with required target current corresponding to the target current curve at the same moment, the required target current control signal is corrected, and the on-off of the solenoid valve is controlled through the corrected required target current control signal to enable the solenoid valve to be in soft landing. The final current control signal is obtained by performing soft landing calculation and correction operation and then comparing and correcting by detecting the actual current flowing through the electromagnetic valve in real time, so that the soft landing of the electromagnetic valve can be ensured all the time.
Drawings
FIG. 1 is a schematic diagram of the basic structure of a solenoid valve;
FIG. 2 is a schematic diagram showing the variation of current I with time T of a solenoid valve controlled by a conventional current control method;
FIG. 3 is a schematic diagram of the variation of the stroke S of the solenoid valve needle valve assembly over time T for controlling the solenoid valve using a prior art control method;
FIG. 4 is a flowchart of a solenoid valve control method in an embodiment of the present invention;
FIG. 5 is a schematic diagram of the soft landing control logic for the solenoid valve in an embodiment of the present invention;
FIG. 6 is a schematic diagram of the connection relationship among the solenoid valve control system, the solenoid valve and the power supply in the embodiment of the present invention;
fig. 7 is a comparison graph of the variation process of the stroke S of the valve body assembly of the solenoid valve with time T after the solenoid valve is controlled by the solenoid valve control system and method according to the embodiment of the present invention and the existing solenoid valve control system and method.
Wherein the reference numerals are as follows:
1-a shell; 2-a coil; 3-an iron core; 4-a spring; 5-a needle valve assembly; 101-a solenoid valve control system; 102-a solenoid valve; 103-a power supply; 11-a control module; 12-an impact factor detection module; 13-a current detection module; 14-a current-to-voltage conversion module; 15-driving the stage switch.
Detailed Description
The solenoid valve control system and method of the present invention will be described in further detail with reference to the drawings and specific embodiments, wherein the drawings are in greatly simplified form and are not to precise scale for the purpose of facilitating and clearly illustrating embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As mentioned above, at the end of the solenoid opening or closing stroke, the solenoid needle assembly may cause some impact against the solenoid internal stop. If the moving speed of the movable part such as the needle valve assembly can be reduced at the end of the opening or closing stroke of the solenoid valve, the impact force on the inner stop end of the solenoid valve can be reduced, so that the damage to the stop end is reduced, and meanwhile, the stroke oscillation is reduced, so that the solenoid valve works stably.
To this end, referring to fig. 4 in combination with fig. 5, fig. 4 is a flowchart illustrating a solenoid valve control method according to an embodiment of the present invention, and fig. 5 is a schematic diagram illustrating a soft landing control logic of a solenoid valve according to an embodiment of the present invention, where an embodiment of the present invention provides a solenoid valve control method, and the solenoid valve control method according to an embodiment of the present invention includes:
step S11, obtaining a soft landing correction current curve of the solenoid valve under a target working condition;
step S12, correcting the initial target current curve of the electromagnetic valve according to the soft landing correction current curve to obtain a required target current curve;
step S13, sending out a demand target current control signal according to the demand target current curve;
Step S14, detecting the actual current flowing through the electromagnetic valve in real time, and comparing the actual current with the required target current curve; if the actual current does not match the required target current corresponding to the target current curve at the same time, step S15 is executed, and if the actual current does not match the required target current corresponding to the target current curve at the same time, step S16 is executed.
And step S15, correcting the demand target current control signal, and controlling the starting and stopping of the electromagnetic valve through the corrected demand target current control signal so as to realize soft landing of the electromagnetic valve.
And step S16, controlling the start and stop of the electromagnetic valve through the required target current control signal to enable the electromagnetic valve to realize soft landing.
In the implementation of the present invention, the step S11 may specifically include:
obtaining a functional relation between the soft landing correction current of the electromagnetic valve needle valve component and a plurality of influence factors;
detecting each influence factor under the target working condition;
and obtaining the soft landing correction current curve according to the detected influence factors and the functional relation.
Furthermore, the functional relationship between the soft landing correction current and a plurality of influence factors of the needle valve assembly of the solenoid valve can be obtained by adopting an off-line test method, and the specific process of the off-line test is as follows
Setting a plurality of groups of influence factors, and carrying out start-stop test on an electromagnetic valve under each group of influence factors;
setting the soft landing correction current according to the operating condition of a needle valve assembly of the electromagnetic valve for performing the start-stop test;
and integrating the plurality of groups of influence factors and the soft landing correction current set corresponding to each group of influence factors to obtain the functional relation between the soft landing correction current and the plurality of influence factors.
Wherein the soft landing correction current curve, the initial target current curve and the demand target current curve are curves of current changing with time. In practical application, the soft landing correction current at the opening stage of the solenoid valve can be counted by a negative value, and the soft landing correction current at the closing time of the solenoid valve can be counted by a positive value, so that at the same time, the current value corresponding to the initial current curve and the current value corresponding to the soft landing correction current curve are added to obtain the current value corresponding to the target current curve.
Generally, the soft landing correction current curve (formed by soft landing correction currents applied at different moments) obtained by detecting the influence factors is corrected for the expected current curve, so that a good soft landing effect can be achieved under a general working condition, however, factors such as actual operating environment change of the solenoid valve, aging of the solenoid valve, difference between individual solenoid valves and the like all influence the moment of applying the soft landing correction current, so that the required target current control signal obtained by correction is influenced, and the actual effect of soft landing is influenced. However, in the solenoid valve control system provided by the present invention, since the current flowing through the solenoid valve can be detected in real time by the current detection module, the required target current control signal obtained by soft landing correction can be adjusted according to the actual current condition, that is, the required target current control signal can be corrected again according to the actual current condition, so that the final current control signal can always ensure soft landing of the solenoid valve.
An embodiment of the present invention further provides a solenoid valve control system, configured to control a solenoid valve 102, referring to fig. 6, where the solenoid valve control system 101 includes: a control module 11, an impact factor detection module 12 and a current detection module 13.
The influence factor detection module 12 detects a plurality of influence factors under a target working condition and sends a detection result to the control module 11;
the control module 11 obtains a soft landing correction current curve according to the detection result of the impact factor detection module 12, corrects an initial target current curve according to the soft landing correction current curve to obtain a required target current curve, and sends a required target current control signal according to the required target current curve;
the current detection module 13 detects the actual current flowing through the solenoid valve and sends the detection result to the control module 11;
the control module 11 corrects the demand target current control signal according to the detection result of the impact factor detection module 12, so as to control the start and stop of the electromagnetic valve 102 through the corrected demand target current control signal, so as to enable the electromagnetic valve 102 to be in soft landing.
Further, the control module 11 stores a functional relationship between the soft landing correction current of the needle valve assembly of the solenoid valve 102 and the plurality of influence factors, and the control module 11 obtains the soft landing correction current curve according to the functional relationship and the detection result of the influence factor detection module 12.
In addition, the electromagnetic valve control system 101 provided by the embodiment of the present invention may further include: the electromagnetic valve control circuit comprises a current-voltage conversion module 14 and a driving level switch 15, wherein the current-voltage conversion module 14 converts a current control signal sent by the control module 11 into a voltage control signal, and the voltage control signal is used for controlling the opening and closing of the driving level switch 15 so as to control the starting and stopping of the electromagnetic valve 102.
The driving stage switch 15 may be a metal-oxide semiconductor field effect transistor or an equivalent electronic switch of the metal-oxide semiconductor field effect transistor, for example, a chip integrated with the metal-oxide semiconductor field effect transistor.
The connection relationship of each component module of the solenoid valve control system 101 is as follows:
the control module is connected to the current-voltage conversion module 14, the impact factor detection module 12 and the current detection module 13, and is connected to the driving stage switch 1515 through the current-voltage conversion module 14 and the current detection module 13, respectively. The gate of the driving switch 1515 is connected to the current-voltage conversion module 14, the source of the driving switch 1515 is connected to the current detection module 13, and the solenoid valve control system 101 is configured to control a solenoid valve 102 by connecting the drain of the driving switch 1515 to the solenoid valve 102. Meanwhile, the solenoid valve control system 101 is further connected with the solenoid valve 103 through the influence factor detection module 12.
The process that the control module corrects the required target current by using the detection result of the current detection module is as follows:
(a) if the required target current is equal to the actual current, controlling the power stage to be closed;
(b) the actual current decreases;
(c) then the required target current > actual current;
(e) immediately after controlling the power stage to be switched on, the actual current is increased again until the required target current is equal to the actual current, and then (a) - (d) are repeated. And the process is circulated.
In fact, the required current curve can also be corrected according to the actual current detected in real time, but the accuracy of the present invention is further improved by correcting the required current curve through the soft landing correction current curve and then through the actual current, because: in practical applications, the current detection module 13 may have an accidental fault, so that a batch deviation occurs in a detection result, and if the soft landing correction time is limited within a certain range by obtaining the functional relationship and measuring an influence factor of an actual working condition, on the basis, the actual current curve is further adjusted, so that the deviation can be avoided.
In the solenoid valve control system 101 and the method provided in the embodiment of the present invention, the influence factors include: the pressure differential P across the needle assembly of the solenoid valve 102 and the ambient temperature T at which the solenoid valve 102 is located. That is, the soft landing correction current Isoft is a function of P and T, and Isoft ═ f (P, T).
For the influence factors, it should be noted here that, in the embodiment of the present invention, only the pressure difference P across the needle valve assembly of the solenoid valve 102 and the ambient temperature T at which the solenoid valve 102 is located are used as the influence factors, but it should be understood that, in practical applications, other influence factors may be added to further improve the accuracy of the soft landing correction current, for example, the operating voltage of the power supply 103 of the solenoid valve control system 101 may be added as the influence factors, and only when the pressure difference P across the needle valve assembly of the solenoid valve and the ambient temperature T at which the solenoid valve 102 is located are detected, the operating voltage of the power supply 103 may be detected synchronously.
The soft landing correction current curve under the target condition is obtained by the solenoid valve control system 101 provided by the embodiment of the invention.
The specific process of obtaining the soft landing correction current curve under the target working condition is as follows:
(1) performing an off-line test to obtain a functional relationship Isoft ═ f (P, T), and storing the functional system in the control module 11;
(2) Calculating to obtain an initial target current curve according to a target opening applied by the electromagnetic valve 102, sending an initial current control signal by the control module 11 according to the initial target current curve to control the electromagnetic valve 102 to complete a process from opening to closing under a target working condition, and detecting P and T in the process for multiple times by the impact factor detection module 12;
(3) the control module 11 obtains a soft landing correction current curve according to the detection result of the impact factor detection module 12 and the functional relationship.
The working process of the electromagnetic valve 102 controlled by the electromagnetic valve control system 101 provided by the embodiment of the invention is as follows:
at the beginning of the opening phase, the current is rapidly increased to generate a large electromagnetic force to rapidly open the needle valve assembly, and at the end of the stroke of the solenoid valve 102, the current is decreased to reduce the movement speed of the needle valve assembly, and then the control current is restored to the target value, so that the stable opening state of the solenoid valve 102 is realized. At the beginning of the closing phase, the current is rapidly reduced, the main acting force applied to the solenoid valve 102 assembly is the spring force minus the electromagnetic force generated by the coil, the solenoid valve 102 assembly rapidly returns, at the end of the stroke, the current is reduced at a reduced speed or slightly increased in the reverse direction to reduce the acting force applied to the needle valve assembly, so that the movement speed is reduced, then the current is reduced, and the needle valve assembly is completely closed under the action of the spring force.
The stroke curve of the needle valve assembly of the solenoid valve 102 controlled by the solenoid valve control system 101 and method of the present embodiment is shown by curve 7a in FIG. 7, and the stroke curve of the needle valve assembly of the solenoid valve 102 controlled by the conventional solenoid valve control system 101 and method is shown by curve 7b in FIG. 7. Compared with the above, it can be seen that the solenoid valve 102 controlled by the solenoid valve control system 101 and the method provided in the present embodiment has a reduced opening speed (reduced stroke ascending gradient) at the end of the opening stroke, and the stroke vibration is also significantly reduced at the end of the opening stroke; during the closing phase, the closing speed of the needle valve stroke is reduced (the stroke descending gradient is slowed), and at the same time, the stroke vibration is obviously reduced at the closing end stop. Therefore, the solenoid valve control system 101 provided by the invention can well control the solenoid valve 102 to realize soft landing of the needle valve assembly of the solenoid valve.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (14)
1. A solenoid valve control method, comprising:
Obtaining a soft landing correction current curve of an electromagnetic valve under a target working condition;
correcting the initial target current curve of the electromagnetic valve according to the soft landing correction current curve to obtain a required target current curve;
sending out a demand target current control signal according to the demand target current curve, an
And detecting the actual current flowing through the electromagnetic valve in real time, comparing the actual current with the required target current curve, and controlling the starting and stopping of the electromagnetic valve by correcting the required target current control signal so as to realize soft landing of the electromagnetic valve.
2. The method of solenoid valve control of claim 1, wherein obtaining a soft landing correction current profile for the solenoid valve at the target operating condition comprises:
obtaining a functional relation between the soft landing correction current of the needle valve assembly of the solenoid valve and a plurality of influence factors;
detecting each influence factor under the target working condition;
and obtaining the soft landing correction current curve according to the detected influence factors and the functional relation.
3. The method of claim 2, wherein the functional relationship between the soft landing correction current and the plurality of impact factors for the needle assembly of the solenoid valve is obtained by an off-line test, wherein the off-line test comprises:
Setting a plurality of groups of influence factors, and carrying out start-stop test on an electromagnetic valve under each group of influence factors;
setting the soft landing correction current according to the operating condition of a needle valve assembly of the electromagnetic valve for performing the start-stop test;
and integrating the plurality of groups of influence factors and the soft landing correction current set corresponding to each group of influence factors to obtain the functional relation between the soft landing correction current and the plurality of influence factors.
4. The solenoid valve control method according to claim 2, wherein the influence factor includes: the pressure difference between two ends of the needle valve component of the electromagnetic valve and the environment temperature of the electromagnetic valve.
5. The solenoid valve control method of claim 1, wherein said soft landing correction current profile, said initial target current profile, and said demand target current profile are current versus time profiles.
6. The solenoid valve control method of claim 5, wherein the current value corresponding to the soft landing correction current curve is a negative value during the solenoid valve opening phase and a positive value during the solenoid valve closing phase.
7. The solenoid valve control method of claim 6, wherein at the same time, the current value corresponding to the initial target current curve and the current value corresponding to the soft landing correction current curve are added to obtain the current value corresponding to the required target current curve.
8. The solenoid valve control method of claim 1, wherein the initial target current curve is calculated based on a target opening degree to which the solenoid valve is applied.
9. A solenoid valve control system for controlling a solenoid valve, said solenoid valve control system comprising: the device comprises a control module, an influence factor detection module and a current detection module;
the influence factor detection module detects a plurality of influence factors under a target working condition and sends a detection result to the control module;
the control module obtains a soft landing correction current curve according to the detection result of the influence factor detection module, corrects an initial target current curve according to the soft landing correction current curve to obtain a required target current curve, and sends a required target current control signal according to the required target current curve;
the current detection module detects the actual current flowing through the electromagnetic valve and sends a detection result to the control module;
and the control module corrects the required target current control signal according to the detection result of the influence factor detection module, so that the on-off of the electromagnetic valve is controlled through the corrected required target current control signal to enable the electromagnetic valve to be in soft landing.
10. The solenoid valve control system of claim 9, wherein said impact factor comprises: the pressure difference between two ends of the solenoid valve needle valve component and the environment temperature of the solenoid valve.
11. The solenoid valve control system of claim 9, wherein the control module stores a functional relationship between the soft landing correction current of the solenoid valve needle assembly and the plurality of impact factors, and the control module obtains the soft landing correction current curve according to the functional relationship and the detection result of the impact factor detection module.
12. The solenoid valve control system according to claim 9, further comprising a current-voltage conversion module and a driving stage switch, wherein the current-voltage conversion module converts a current control signal sent by the control module into a voltage control signal, and the voltage control signal is used for controlling the driving stage switch to open and close to control the solenoid valve to start and stop.
13. The solenoid valve control system of claim 12, wherein said driver stage switch is a metal-oxide semiconductor field effect transistor or an equivalent electronic switch of a metal-oxide semiconductor field effect transistor.
14. The solenoid valve control system according to claim 13, wherein a gate of the driver stage switching tube is connected to the current-to-voltage conversion module, a source of the driver stage switching tube is connected to the current detection module, and a drain of the driver stage switching tube is connected to the solenoid valve.
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| CN201910351540.7A CN111853323A (en) | 2019-04-28 | 2019-04-28 | Control system and method for electromagnetic valve |
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| CN201910351540.7A CN111853323A (en) | 2019-04-28 | 2019-04-28 | Control system and method for electromagnetic valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11148327A (en) * | 1997-11-13 | 1999-06-02 | Nippon Soken Inc | Solenoid valve drive device |
| US5951616A (en) * | 1996-04-15 | 1999-09-14 | Aisin Aw Co., Ltd. | Current control system for linear solenoid |
| KR20020013020A (en) * | 2000-08-10 | 2002-02-20 | 밍 루 | Apparatus for measuring current of solenoid valve |
| US6373678B1 (en) * | 1999-05-03 | 2002-04-16 | Fev Motorentechnik Gmbh | Method of regulating the armature impact speed in an electromagnetic actuator by controlling the current supply based on performance characteristics |
| CN1396374A (en) * | 2001-03-13 | 2003-02-12 | 丰田自动车株式会社 | Control equipment and method of magnetic valve |
| CN101451623A (en) * | 2008-12-17 | 2009-06-10 | 中国航天科技集团公司第六研究院第十一研究所 | Pulse width modulation type digital high speed switch solenoid valve |
| CN108349464A (en) * | 2015-10-21 | 2018-07-31 | 日立汽车系统株式会社 | Brake control |
| CN108980441A (en) * | 2018-08-21 | 2018-12-11 | 广西柳工机械股份有限公司 | Proportion magnetic valve driving method based on PWM |
-
2019
- 2019-04-28 CN CN201910351540.7A patent/CN111853323A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951616A (en) * | 1996-04-15 | 1999-09-14 | Aisin Aw Co., Ltd. | Current control system for linear solenoid |
| JPH11148327A (en) * | 1997-11-13 | 1999-06-02 | Nippon Soken Inc | Solenoid valve drive device |
| US6373678B1 (en) * | 1999-05-03 | 2002-04-16 | Fev Motorentechnik Gmbh | Method of regulating the armature impact speed in an electromagnetic actuator by controlling the current supply based on performance characteristics |
| KR20020013020A (en) * | 2000-08-10 | 2002-02-20 | 밍 루 | Apparatus for measuring current of solenoid valve |
| CN1396374A (en) * | 2001-03-13 | 2003-02-12 | 丰田自动车株式会社 | Control equipment and method of magnetic valve |
| CN101451623A (en) * | 2008-12-17 | 2009-06-10 | 中国航天科技集团公司第六研究院第十一研究所 | Pulse width modulation type digital high speed switch solenoid valve |
| CN108349464A (en) * | 2015-10-21 | 2018-07-31 | 日立汽车系统株式会社 | Brake control |
| CN108980441A (en) * | 2018-08-21 | 2018-12-11 | 广西柳工机械股份有限公司 | Proportion magnetic valve driving method based on PWM |
Non-Patent Citations (4)
| Title |
|---|
| 【德】康拉德.莱夫: "《BOSCH柴油机管理 系统与组件》", 30 June 2018, 北京理工大学出版社 * |
| 【美】A.H.海恩: "《流体动力系统的故障诊断及排除》", 31 August 2000, 机械工业出版社 * |
| 张延召: "活塞式内燃机用高速电磁阀控制策略研究", 《万方数据知识服务平台》 * |
| 李硕: "《液压与气压传动》", 31 January 2019, 华中科技大学出版社 * |
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