CN111175588A - Method and device for detecting opening time of electromagnetic valve and method for correcting opening time - Google Patents
Method and device for detecting opening time of electromagnetic valve and method for correcting opening time Download PDFInfo
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- CN111175588A CN111175588A CN201811340454.8A CN201811340454A CN111175588A CN 111175588 A CN111175588 A CN 111175588A CN 201811340454 A CN201811340454 A CN 201811340454A CN 111175588 A CN111175588 A CN 111175588A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
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Abstract
The invention provides a method for detecting the opening time of an electromagnetic valve, a method for correcting the opening time of the electromagnetic valve and a device for detecting the opening time of the electromagnetic valve. The characteristic inflection point is obtained by the electromagnetic valve opening time detection device provided by the invention. The characteristic inflection point can be timely and accurately calculated no matter how the working condition and the state of the electromagnetic valve change, so that compared with the prior art, the control precision of batch products and the whole life cycle of the products is greatly improved after the original electromagnetic valve opening time is corrected by using the electromagnetic valve opening time correction method provided by the invention.
Description
Technical Field
The invention relates to the technical field of electromagnetic valve control, in particular to an electromagnetic valve opening time detection method, an electromagnetic valve opening time correction method and an electromagnetic valve opening time detection device.
Background
The electromagnetic valve is widely applied to automobile engines, such as a carbon tank control valve, a variable valve timing control valve, a variable valve lift control valve, a secondary air control valve, an oil pump control electromagnetic valve, a fuel injection valve and the like.
The opening of these solenoid valves in the motor vehicle engine is effected by applying a battery voltage excitation, which is applied by opening an electronic switch at the desired solenoid valve opening time. However, after the excitation voltage is applied to the electromagnetic valve, the movement of the valve body of the electromagnetic valve has a certain stroke, so that the change of the excitation current generated by applying the excitation voltage has a certain process, and therefore, in the actual opening process of the electromagnetic valve, an obvious opening delay phenomenon exists, the actual opening time of the electromagnetic valve is later than the time of applying the battery voltage excitation, and therefore, the actual opening time of the electromagnetic valve is shorter than the time of originally needing to be opened, and a certain influence is caused on the control result of the electromagnetic valve. Referring to fig. 1, which shows the relationship between the stroke S of the valve body of the solenoid valve and the time T, T0 is the time when the battery voltage is applied for excitation, T1 is the time when the solenoid valve is actually opened, and the difference between T1 and T0 is the opening delay time of the solenoid valve, which is counted as Tdelay. Therefore, if the electromagnetic valve is required to be accurately controlled, T is required to passdelayAnd compensating the opening time of the original electromagnetic valve. However, although TdelayUnder specific working conditions, the T of different solenoid valves of the same type is basically unchangeddelayDifferent, the same electromagnetic valve T under different working conditionsdelayDifferent, the same solenoid valve in different application periods, especially before and after aging, TdelayThere will also be relatively large variations.
The conventional solenoid valve control cannot acquire the actual opening time T1, and therefore T cannot be calculateddelayThe method can compensate the opening time of the original solenoid valve, and can only indirectly calibrate the excitation voltage application time of the solenoid valve by using the output result of the solenoid valve control object before the batch production of products, thereby compensating the action delay of the solenoid valve to a certain extent. However, as mentioned above, due to individual differences among the solenoid valves, changes in the operating conditions of the solenoid valves, aging of the solenoid valves, and the like, the application accuracy of such compensation in mass products and the entire life cycle of the products is low.
Disclosure of Invention
The invention aims to provide a method for detecting the opening time of an electromagnetic valve, a method for correcting the opening time of the electromagnetic valve and a device for detecting the opening time of the electromagnetic valve, so as to solve the problem that the opening time of the electromagnetic valve is not accurate enough due to the delay of the opening of the electromagnetic valve.
In order to solve the technical problem, the invention provides a method for detecting the opening time of an electromagnetic valve, which comprises the following steps:
applying excitation voltage to the electromagnetic valve;
collecting excitation current generated by applying excitation voltage to the electromagnetic valve according to a collection parameter to form a current data set;
calculating an excitation current characteristic inflection point according to the current data set to obtain an opening time T1 of the electromagnetic valve;
optionally, in the method for detecting the opening time of the solenoid valve, the acquisition parameters include acquisition frequency, acquisition times and/or acquisition time.
A method for correcting an opening time of a solenoid valve, the method comprising:
the electromagnetic valve opening timing detection method according to any one of claims 1 or 2 obtaining an electromagnetic valve opening timing T1 and recording a timing T0 at which an excitation voltage is applied to an electromagnetic valve in the electromagnetic valve opening timing detection method;
obtaining the solenoid valve opening delay time T according to the solenoid valve opening time T1 and the excitation voltage applying time T0delayAccording to said solenoid opening delay time TdelayThe corrected solenoid valve opening time T2 is obtained.
Optionally, in said electromagnetismIn the valve opening time correction method, the solenoid valve opening delay time T is obtained by subtracting the time T0 of applying the excitation voltage from the solenoid valve opening time T1delay。
Optionally, in the method for correcting the opening time of the electromagnetic valve, the original opening time of the electromagnetic valve and the opening delay time T of the electromagnetic valve are useddelayThe corrected solenoid valve opening time T2 is obtained by addition.
Optionally, in the method for correcting the opening time of the electromagnetic valve, the opening time of the primary electric valve is set according to a demand of an electromagnetic valve control object.
An electromagnetic valve opening timing detection apparatus used for the electromagnetic valve opening timing detection method described above, characterized by comprising: the device comprises a detection unit, a control unit and an electronic switch;
the detection unit collects excitation current generated by applying excitation voltage to the electromagnetic valve according to a collection parameter to form a current data set and outputs the current data set to the control unit;
the control unit calculates an excitation current characteristic inflection point according to the current data set to obtain the opening time T1 of the electromagnetic valve;
the electronic switch is used for controlling the starting and stopping of the electromagnetic valve.
Optionally, in the electromagnetic valve opening timing detection apparatus, the detection unit includes an operational amplifier and an analog-to-digital converter; the operational amplifier is used for amplifying current or corresponding voltage signals flowing through the electromagnetic valve, and the analog-digital converter is used for collecting the amplified current or voltage signals and carrying out data conversion to form a current data set.
Optionally, in the device for detecting the opening time of the electromagnetic valve, the detection unit further includes a hall sensor, a hall element, or a resistor; the operational amplifier amplifies a current Hall signal of the Hall sensor or the Hall element or a voltage signal at two ends of the resistor; and the analog-digital converter collects the amplified current Hall signal or the amplified voltage signal and performs data conversion to form a current data set.
Optionally, in the device for detecting the opening time of the electromagnetic valve, the electronic switch is a resistive electronic switch; the operational amplifier amplifies voltage signals at two ends of the resistive electronic switch, and the analog-digital converter collects the amplified voltage signals and converts the data to form a current data set.
Alternatively, in the electromagnetic valve opening timing detection device, the operational amplifier is a differential operational amplifier.
Optionally, in the device for detecting the opening time of the electromagnetic valve, the control unit includes a switch control module and a current characteristic identification module, the switch control module controls the electronic switch to open and close to control the electromagnetic valve to start and stop, and the current characteristic identification module calculates a characteristic inflection point of the current data set.
Optionally, in the device for detecting the opening time of the electromagnetic valve, the detection unit further includes a buffer area, and the buffer area is used for storing the current data set and transmitting the current data set to the control unit.
The method for detecting the opening time of the electromagnetic valve calculates the characteristic inflection point according to the change of the excitation current so as to obtain the actual opening time of the electromagnetic valve. The characteristic inflection point is obtained by the electromagnetic valve opening time detection device provided by the invention. The characteristic inflection point can be timely and accurately calculated no matter how the working condition and the state of the electromagnetic valve change, so that compared with the prior art, the control precision of batch products and the whole life cycle of the products is greatly improved after the original electromagnetic valve opening time is corrected by using the electromagnetic valve opening time correction method provided by the invention.
Drawings
FIG. 1 is a schematic diagram of the stroke S of a valve body of a solenoid valve in the prior art versus time T;
FIG. 2 is a schematic diagram of the relationship between the solenoid valve excitation current and the actual opening time of the solenoid valve in the embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting a start time and a method for correcting a start time of a solenoid according to an embodiment of the present invention;
FIG. 4 is a comparison graph of control effects of the solenoid valve control time respectively corrected by the solenoid valve opening time correction method according to the embodiment of the present invention and the conventional method to control different flow rates;
fig. 5 is a schematic structural diagram of an overall structure of a device for detecting a moment when a solenoid valve is opened according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a device for detecting the opening time of an electromagnetic valve according to a first embodiment of the present invention;
fig. 7 is a schematic structural diagram of a device for detecting a start time of an electromagnetic valve according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of a device for detecting the opening time of an electromagnetic valve according to a third embodiment of the present invention;
fig. 9 is a schematic structural diagram of a device for detecting the opening time of an electromagnetic valve according to a fourth embodiment of the present invention.
Detailed Description
The researchers of the invention find that the opening time of the electromagnetic valve has definite corresponding relation with the exciting current of the electromagnetic valve through research. After the exciting voltage is applied to the electromagnetic valve, the exciting current of the electromagnetic valve is gradually increased, the electromagnetic force is synchronously increased along with the increase of the exciting current, and when the electromagnetic force is greater than the resistance of the electromagnetic valve, the electromagnetic valve is opened. When the solenoid valve is opened, the magnetic field of the solenoid valve is changed, so that the excitation current is changed, and the excitation current shows a characteristic inflection point. The appearance time of the characteristic inflection point of the exciting current changes along with the change of the working condition of the electromagnetic valve, when other working conditions are the same, the appearance time of the characteristic inflection point of the exciting current corresponding to different electromagnetic valves is different, the characteristic inflection point of the exciting current can also change after the same electromagnetic valve is aged, and the actual opening time of the electromagnetic valve actually changes under the conditions. Advantageously, the characteristic inflection point G of the solenoid excitation current I corresponds to the opening time T1 of the solenoid, as shown in fig. 2, whatever the operating conditions change. In view of the above, the present invention provides a method for detecting an opening time of an electromagnetic valve, a method for correcting an opening time of an electromagnetic valve, and an apparatus for detecting an opening time of an electromagnetic valve, in which the opening time of an electromagnetic valve is corrected by calculating a characteristic inflection point.
The following describes a method for detecting the opening time of an electromagnetic valve, a method for correcting the opening time of an electromagnetic valve, and a device for detecting the opening time of an electromagnetic valve according to the present invention in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the 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.
[ EXAMPLES one ]
First, referring to fig. 3, an embodiment of the present invention provides a method for detecting an opening time of an electromagnetic valve, where the method includes:
s301, excitation voltage is applied to the electromagnetic valve.
S302, collecting excitation current generated by applying excitation voltage to the electromagnetic valve according to a collection parameter to form a current data set; the acquisition parameters comprise acquisition frequency, acquisition times and/or acquisition time.
And S303, calculating an excitation current characteristic inflection point according to the current data set by the control unit to obtain the opening time T1 of the electromagnetic valve.
No matter how the working condition and the state of the electromagnetic valve change, the characteristic inflection point can be calculated accurately in time, namely the opening time T1 of the electromagnetic valve can be obtained accurately in time. Therefore, in the embodiment of the present invention, the solenoid valve opening time T1 obtained by the method for detecting the solenoid valve opening time is used to correct the solenoid valve opening time, which is particularly significant for batch products and the whole life cycle of the products.
Referring to fig. 3, an embodiment of the present invention further provides a method for correcting an opening time of an electromagnetic valve, where the method includes:
obtaining T1 through S301-S303, and recording the time T0 when the exciting voltage is applied to the electromagnetic valve in the step S301; and the number of the first and second groups,
s304, obtaining the solenoid valve opening delay time T according to the solenoid valve opening time T1 and the excitation voltage applying time T0delayAccording to said solenoid opening delay time TdelayThe corrected solenoid valve opening time T2 is obtained. Specifically, the solenoid valve opening delay time T is obtained by subtracting the solenoid valve opening timing T1 from the excitation voltage application timing T0delayBy delaying the original solenoid valve opening time by the solenoid valve opening delay time TdelayThe corrected solenoid valve opening time T2 is obtained by addition.
As mentioned above, the opening delay time of the solenoid valve can be greatly changed for different working conditions or different application periods of the same solenoid valve, and the opening delay time T of the solenoid valve obtained in the embodiment of the invention is useddelayThe opening time T1 of the electromagnetic valve is updated in real time, so the electromagnetic valve passes through TdelayThe obtained solenoid valve opening time T2 is also updated in real time along with the change of the working condition and the solenoid valve application period, so that the corrected solenoid valve opening time T2 is always kept accurate.
It is worth to be noted that the original opening time of the electromagnetic valve is set according to the demand of the electromagnetic valve control object, and is related to the actual operation condition. For example, when the flow rate is controlled by the solenoid valve, the opening time of the original solenoid valve is set by the total output amount of the required flow rate, and the larger the total output amount of the required flow rate is, the longer the corresponding opening time of the original solenoid valve is.
In an application example of an electromagnetic valve for controlling flow, after the opening time of the electromagnetic valve is respectively corrected by the method for correcting the opening time of the electromagnetic valve provided by the embodiment of the invention and by a traditional method, the corrected opening time of the electromagnetic valve is used for controlling the flow with different sizes. As shown in fig. 4, which is a schematic diagram of the relationship between the flow rate and the control time, the control time of L1 is corrected by the solenoid opening time correction method provided in the embodiment of the present invention, and the control time of L2 is corrected by the conventional method. It can be seen from the figure that in the small flow rate region, the linear region of the flow rate is obviously enlarged by adopting the method for correcting the opening time of the electromagnetic valve in the embodiment of the invention, so that the small flow rate region is accurately controlled, and only the flow rate with a larger value can be applied by adopting the traditional method. Meanwhile, by using the method for correcting the opening time of the electromagnetic valve, provided by the embodiment of the invention, the flow difference caused by the difference between samples is small; whereas with conventional methods, the flow difference caused by the difference between samples is large. Therefore, the method for correcting the opening time of the electromagnetic valve provided by the embodiment of the invention can be used for well solving the problem that the traditional correction method is not accurate enough.
Meanwhile, an embodiment of the present invention further provides a device 102 for detecting an opening time of an electromagnetic valve 101, as shown in fig. 5 and referring to fig. 6, 7, 8, and 9, where the device 102 includes: a detection unit 11, a control unit 12 and an electronic switch 13.
The detection unit 11 collects excitation current generated by applying excitation voltage to the electromagnetic valve according to a collection parameter to form a current data set and outputs the current data set to the control unit 12; wherein the detection unit 11 includes an operational amplifier 111 and an analog-to-digital converter (ADC) 112; the operational amplifier 111 is configured to amplify a current or voltage signal flowing through the solenoid valve 101, and the analog-to-digital converter 112 collects the amplified current or voltage signal and performs data conversion to form a current data set. Optionally, the operational amplifier 111 is a differential operational amplifier 1111.
The control unit 12 calculates an excitation current characteristic inflection point according to the current data set to obtain an opening time T1 of the electromagnetic valve 101; specifically, the control unit 12 includes a switch control module 121 and a current characteristic identification module 122, the switch control module 121 controls the electronic switch 13 to open and close to control the on/off of the solenoid valve 101, and the current characteristic identification module 122 calculates a characteristic inflection point of the current data set.
The electronic switch 13 is used for controlling the on-off of the electromagnetic valve 101.
Optionally, the detection unit 11 further includes a hall sensor 113, a hall element 114, or a resistor Rs 115; the operational amplifier 111 amplifies the current hall signal of the hall sensor 113 or the hall element 114 or the voltage signal across the resistor Rs 115; the analog-to-digital converter 112 collects the amplified current hall signal or the amplified voltage signal and performs data conversion to form a current data set. Alternatively, the electronic switch 13 is a resistive electronic switch 131; the operational amplifier 111 amplifies voltage signals at two ends of the resistive electronic switch 131, and the analog-to-digital converter 112 collects the amplified voltage signals and converts the voltage signals into a current data set.
Further optionally, the detection unit 11 further comprises a buffer (not shown) for storing the current data set and transmitting the current data set to the control unit 12.
In the embodiment of the present invention, it is preferable that the detecting unit 11 includes a hall sensor 113, and a circuit connection relationship among parts of the solenoid opening timing detecting device is as shown in fig. 6, wherein both ends of the hall sensor 113 are respectively connected to the electronic switch 13 and the operational amplifier 111, and the electronic switch 13, the hall sensor 113, and the operational amplifier 111 form a series connection relationship. The hall sensor 113 detects a current flowing in the solenoid valve, the operational amplifier 111 amplifies a current hall signal, and the analog-digital converter 112 collects and converts data of the current hall signal.
[ example two ]
Different from the first embodiment, in the present embodiment, the detection unit includes a hall element 114, two ends of the hall element 114 are respectively connected to the electronic switch 13 and the operational amplifier 111, and the electronic switch 13, the hall element 114 and the operational amplifier 111 form a serial connection relationship, and please refer to fig. 7 for a specific connection relationship. Compared with the first embodiment, the wiring harness of the Hall sensor 113 is omitted, so that the wiring harness cost is saved on one hand; on the other hand, the requirements of a filter circuit are reduced; in addition, the influence on the signal reference ground is further reduced.
[ EXAMPLE III ]
Different from the above embodiments, the detecting unit in this embodiment includes a resistor Rs115, the operational amplifier 111 is a differential operational amplifier 1111, one end of the resistor Rs115 is connected in series to the ground terminal of the electronic switch 13, and the other end of the resistor Rs115 is connected to the lower end of the electronic switch 13. Meanwhile, two ends of the resistor Rs115 are connected to the differential operational amplifier 1111, an output end of the differential operational amplifier 1111 is connected to the analog-to-digital converter 112, the voltage Vs across the resistor Rs is collected through the analog-to-digital converter 112, and the excitation current of the solenoid valve is obtained according to the relation I-Vs/Rs. Please refer to fig. 8 for a specific connection relationship.
Because the resistor Rs115 is connected in the electromagnetic valve driving circuit in series, the total resistance of the driving circuit is slightly increased under the same working condition, but the influence on the driving and exciting current of the electromagnetic valve is small because the resistance value of the current resistor Rs is small, and only the driving and exciting parameters of the electromagnetic valve need to be correspondingly adjusted. And the resistor with lower cost is adopted to replace the Hall sensor 113 or the Hall element 114, so that the practical production and application values are higher.
[ EXAMPLE IV ]
As shown in fig. 9, the electronic switch 13 in this embodiment is a resistive electronic switch 131. The current sensing utilizes the resistive characteristics of a resistive electronic switch 131, such as a MOSFET, instead of resistor Rs115 in the third embodiment. The two ends of the resistive electronic switch 131 are connected to the non-inverting end and the inverting end of the differential operational amplifier 1111, respectively. The voltage Vswitch across the resistive electronic switch 131 is collected by the adc 112, and the excitation current of the solenoid valve is obtained according to the relationship I-Vswitch/Rswitch.
Compared with the three phases of the embodiment, because no resistor is connected in series, the driving and exciting current of the electromagnetic valve is not influenced, the driving and exciting parameters of the electromagnetic valve do not need to be adjusted in practical application, and the cost advantage is also achieved.
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 (13)
1. A method for detecting the opening time of an electromagnetic valve is characterized by comprising the following steps:
applying excitation voltage to the electromagnetic valve;
collecting excitation current generated by applying excitation voltage to the electromagnetic valve according to a collection parameter to form a current data set;
and calculating an excitation current characteristic inflection point according to the current data set to obtain the opening time T1 of the electromagnetic valve.
2. The method for detecting the opening time of the electromagnetic valve according to claim 1, wherein the acquisition parameters comprise acquisition frequency, acquisition times and/or acquisition time.
3. An electromagnetic valve opening time correction method is characterized by comprising the following steps:
the electromagnetic valve opening timing detection method according to any one of claims 1 or 2 obtaining an electromagnetic valve opening timing T1 and recording a timing T0 at which an excitation voltage is applied to an electromagnetic valve in the electromagnetic valve opening timing detection method;
obtaining the solenoid valve opening delay time T according to the solenoid valve opening time T1 and the excitation voltage applying time T0delayAccording to said solenoid opening delay time TdelayThe corrected solenoid valve opening time T2 is obtained.
4. The solenoid valve opening time correction method according to claim 3, characterized in that the solenoid valve opening delay time T is obtained by subtracting the time T0 at which the excitation voltage is applied from the time T1 at which the solenoid valve is openeddelay。
5. The method for correcting the opening time of a solenoid valve according to claim 3, wherein the original opening time of the solenoid valve is delayed from the opening time of the solenoid valveTime TdelayThe corrected solenoid valve opening time T2 is obtained by addition.
6. The method for correcting the opening time of the electromagnetic valve according to claim 5, wherein the original opening time of the electromagnetic valve is set in accordance with a demand of an electromagnetic valve control target.
7. An electromagnetic valve opening timing detection apparatus, characterized by comprising: the device comprises a detection unit, a control unit and an electronic switch;
the detection unit collects excitation current generated by applying excitation voltage to the electromagnetic valve according to a collection parameter to form a current data set and outputs the current data set to the control unit;
the control unit calculates an excitation current characteristic inflection point according to the current data set to obtain the opening time T1 of the electromagnetic valve;
the electronic switch is used for controlling the starting and stopping of the electromagnetic valve.
8. The electromagnetic valve opening timing detecting device according to claim 7, wherein the detecting unit includes an operational amplifier and an analog-digital converter; the operational amplifier is used for amplifying current or corresponding voltage signals flowing through the electromagnetic valve, and the analog-digital converter is used for collecting the amplified current or voltage signals and carrying out data conversion to form a current data set.
9. The electromagnetic valve opening timing detecting device according to claim 8, wherein the detecting unit further includes a hall sensor, a hall element, or a resistor; the operational amplifier amplifies a current Hall signal of the Hall sensor or the Hall element or a voltage signal at two ends of the resistor; and the analog-digital converter collects the amplified current Hall signal or the amplified voltage signal and performs data conversion to form a current data set.
10. The electromagnetic valve opening timing detection apparatus according to claim 8, wherein the electronic switch is a resistive electronic switch; the operational amplifier amplifies voltage signals at two ends of the resistive electronic switch, and the analog-digital converter collects the amplified voltage signals and converts the data to form a current data set.
11. The electromagnetic valve opening timing detection apparatus according to claim 8, wherein the operational amplifier is a differential operational amplifier.
12. The device for detecting the opening time of the electromagnetic valve according to claim 7, wherein the control unit comprises a switch control module and a current characteristic identification module, the switch control module controls the electronic switch to open and close so as to control the electromagnetic valve to be started and stopped, and the current characteristic identification module calculates a characteristic inflection point of the current data set.
13. The apparatus for detecting the opening timing of a solenoid according to claim 7, wherein said detection unit further comprises a buffer for storing said current data set and transmitting said current data set to said control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811340454.8A CN111175588A (en) | 2018-11-12 | 2018-11-12 | Method and device for detecting opening time of electromagnetic valve and method for correcting opening time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811340454.8A CN111175588A (en) | 2018-11-12 | 2018-11-12 | Method and device for detecting opening time of electromagnetic valve and method for correcting opening time |
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| CN201811340454.8A Pending CN111175588A (en) | 2018-11-12 | 2018-11-12 | Method and device for detecting opening time of electromagnetic valve and method for correcting opening time |
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| CN102493886A (en) * | 2011-11-30 | 2012-06-13 | 潍柴动力股份有限公司 | Method and device for correcting opening time of fuel injector |
| CN102959218A (en) * | 2010-04-26 | 2013-03-06 | 欧陆汽车有限责任公司 | Electric actuation of valve based on knowledge of closing time of valve |
| CN108020778A (en) * | 2017-11-24 | 2018-05-11 | 广西松浦电子科技有限公司 | The measuring method and system, computer equipment of a kind of solenoid valve response time |
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- 2018-11-12 CN CN201811340454.8A patent/CN111175588A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294534A (en) * | 2007-04-26 | 2008-10-29 | 无锡油泵油嘴研究所 | Solenoid valve diagnosis detecting method and device for electric-controlled co-rail fuel feed pump |
| CN102959218A (en) * | 2010-04-26 | 2013-03-06 | 欧陆汽车有限责任公司 | Electric actuation of valve based on knowledge of closing time of valve |
| CN102493886A (en) * | 2011-11-30 | 2012-06-13 | 潍柴动力股份有限公司 | Method and device for correcting opening time of fuel injector |
| CN108020778A (en) * | 2017-11-24 | 2018-05-11 | 广西松浦电子科技有限公司 | The measuring method and system, computer equipment of a kind of solenoid valve response time |
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