CN103437931A - Method for measuring movement delay of electromagnetic valve - Google Patents
Method for measuring movement delay of electromagnetic valve Download PDFInfo
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- CN103437931A CN103437931A CN2013104031447A CN201310403144A CN103437931A CN 103437931 A CN103437931 A CN 103437931A CN 2013104031447 A CN2013104031447 A CN 2013104031447A CN 201310403144 A CN201310403144 A CN 201310403144A CN 103437931 A CN103437931 A CN 103437931A
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- electromagnet
- electromagnetic valve
- driving current
- valve driving
- solenoid valve
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Abstract
The invention provides a method for measuring the movement delay of an electromagnetic valve. The method comprises the following steps of fixing an acceleration sensor on the top end of an electromagnet of the electromagnetic valve and rigidly connecting the acceleration sensor with the electromagnet; outputting electromagnetic valve driving currents from an ECU (electronic control unit) to drive the electromagnetic valve; acquiring a vibration signal of the electromagnet by the acceleration sensor, amplifying the vibration signal of the electromagnet, transmitting the amplified signal to an oscilloscope so as to display an electromagnet vibration wave form, meanwhile acquiring an electromagnetic valve driving current signal by a current acquisition device and transmitting the electromagnetic valve driving current signal to the oscilloscope so as to display an electromagnetic valve driving current wave form; analyzing the electromagnet vibration wave form and the electromagnetic valve driving current wave form and calculating a time difference Delta t between the movement starting time point of an armature of the electromagnetic valve and the generation starting time point of the electromagnetic valve driving current. The method is used for measuring the movement delay of the electromagnetic valve.
Description
Technical field
The present invention relates to a kind of method of measurement, the method for measurement that especially a kind of solenoid movement postpones.
Background technique
The measurement that the current solenoid movement for oil sprayer postpones, the displacement of armature lever while usually utilizing laser displacement sensor to measure the solenoid valve action, need to disassemble fuel injector structure and measure, can't measure in oil sprayer actual motion process, measurement result can not embody actual motion and postpone.The disclosed solenoid valve of Chinese patent CN101294534B opens and closes the method for measurement of delay situation, and the flex point that the method just occurs by drive current waveform judges that the open and close of solenoid valve postpone, and can not measure the actual motion situation of solenoid valve; The disclosed magnetic valve performance detecting system of Chinese patent CN101881703A, mention the movement process of adopts pressure sensor or inductive sensor reaction solenoid valve, but there is no specific implementation method in this system.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the method of measurement that provides a kind of solenoid movement to postpone, the measurement of the oscillating signal by the electromagnet to solenoid valve, find out the setting in motion time point of armature, the setting in motion time point and the electromagnetic valve driving current that calculate the armature of solenoid valve start the time difference Δ t between generation time point, are the motion delay time of armature in solenoid valve.The technical solution used in the present invention is:
The method of measurement that a kind of solenoid movement postpones, comprise the following steps,
Step a, degree of will speed up sensor is fixed in the electromagnet top of solenoid valve, with electromagnet, is rigidly connected;
Step b, ECU output solenoid valve driving current, drive solenoid valve;
Step c, used acceleration transducer to gather the oscillating signal of electromagnet, after the oscillating signal of electromagnet is amplified, is sent on oscillograph and demonstrates the electromagnet vibrational waveform; Use current acquisition equipment to gather the electromagnetic valve driving current signal simultaneously, be sent on oscillograph and demonstrate the electromagnetic valve driving current waveform;
Steps d, analyze electromagnet vibrational waveform and electromagnetic valve driving current waveform, find out the setting in motion time point of armature, the setting in motion time point and the electromagnetic valve driving current that calculate the armature of solenoid valve start the time difference Δ t between generation time point, are the motion delay time of armature in solenoid valve.
Further, in described step c, use charge amplifier to be amplified the oscillating signal of the electromagnet of acceleration transducer collection.
Further, described current acquisition equipment is current clamp.
Advantage of the present invention: use this method to measure the motion delay of solenoid valve, convenient and swift, degree of accuracy is high, without disassembling oil sprayer, can in oil sprayer actual fuel injection process, measure the electromagnet motion delay.
The accompanying drawing explanation
The electromagnetic valve structure schematic diagram that Fig. 1 is oil sprayer of the present invention.
Fig. 2 is measurement connection diagram of the present invention.
Fig. 3 is measured waveform figure of the present invention.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
The solenoid valve of oil sprayer comprises electromagnet 2, spring 3, armature 4, as shown in Figure 1.
As shown in Figure 1 and Figure 2, at first degree of will speed up sensor 1 is fixed in electromagnet 2 tops of solenoid valve to the system of measuring, and with electromagnet 2, is rigidly connected; Acceleration transducer 1 is connected to charge amplifier by concentric cable BNC connector line; The oscillating signal of the electromagnet 2 that charge amplifier gathers for degree of will speed up sensor 1 is amplified, the output termination oscillograph of charge amplifier.The ECU(electronic control unit) connected electromagnetic valve, provide driving current to solenoid valve; Current clamp gathers the electromagnetic valve driving current signal, and outputs on oscillograph and demonstrate electromagnetic valve driving current waveform S1.
When solenoid valve is switched on, electromagnet 2 can produce suction, adhesive armature 4, in the process of adhesive armature 4 and the vibration that produces during with armature 4 collision of electromagnet 2 by acceleration transducer 1, gather, thereby reflect the movement process of whole solenoid valve.Concrete principle is as follows: after the solenoid valve energising of oil sprayer, electromagnet 2 produces electromagnetic attraction, attracts armature 4 to move upward; Because the effect of power is mutual, electromagnet 2 also is subject to the suction F1 of armature 4 to it, and this suction F1 is downward; Electromagnet 2 is subject to the elastic force F2 that spring 3 makes progress to it simultaneously, due to F1 now > F2, so overall the making a concerted effort downwards that electromagnet 2 now is subject to, the initial acceleration direction of electromagnet 2 is downward so.When armature 4 moves upward to moment of peak and electromagnet 2 collisions, electromagnet 2 also has been subject to the impact force that make progress of armature 4 to it, overall the making a concerted effort upwards that now electromagnet 2 is subject to, electromagnet 2 acceleration now is with respect to acceleration before, will be oppositely, and, due to shock, numerical value is larger.After the solenoid valve outage of oil sprayer, armature 4 will move downward, and electromagnet 2 is subject to the elastic force F2 that spring 3 makes progress to it, and electromagnet 2 is overall makes a concerted effort upwards.The stressing conditions of electromagnet 2 determines the acceleration of electromagnet 2, and the acceleration change of electromagnet 2 has reflected the Vibration Condition of electromagnet 2.
Measure the oscillating signal (situation that reflects vibration by the variation of acceleration measurement) of electromagnet 2 and demonstrate electromagnet vibrational waveform S2 on display device.Analyze electromagnet vibrational waveform S2, can find out the zero hour that the setting in motion time point A(of armature 4 should put the initial acceleration of corresponding electromagnet 2), as shown in the A point of electromagnet vibrational waveform S2 in Fig. 3.
When the solenoid valve energising of giving oil sprayer, measure the electromagnetic valve driving current signal simultaneously, find out electromagnetic valve driving current generation time point D, as shown in the D point of electromagnetic valve driving current waveform S1 in Fig. 3.
Time difference Δ t between the setting in motion time point A of the armature 4 of solenoid valve and electromagnetic valve driving current generation time point D, be motion delay time of armature 4 in solenoid valve.Solenoid movement postpones usually just to refer to the motion delay time of armature 4 in solenoid valve.
Concrete measurement procedure is as follows:
A.) degree of will speed up sensor 1 is fixed in electromagnet 2 tops of solenoid valve, with electromagnet 2, is rigidly connected;
B.) ECU output solenoid valve driving current, drive solenoid valve;
C.) use acceleration transducer 1 to gather the oscillating signal of electromagnet 2, the oscillating signal of electromagnet 2 is sent on oscillograph and demonstrates electromagnet vibrational waveform S2 after charge amplifier amplifies; Use current clamp to gather the electromagnetic valve driving current signal simultaneously, be sent on oscillograph and demonstrate electromagnetic valve driving current waveform S1;
D.) analyze electromagnet vibrational waveform S2 and electromagnetic valve driving current waveform S1, find out the setting in motion time point A of armature 4, the setting in motion time point A and the electromagnetic valve driving current that calculate the armature 4 of solenoid valve start the time difference Δ t between generation time point D, are the motion delay time of armature 4 in solenoid valve.
In above-mentioned steps c, also can use other current acquisition equipment to gather the electromagnetic valve driving current signal.
In Fig. 3, the setting in motion time point that the A point is armature 4, the B point moves to peak and electromagnet 2 time of collision points for armature 4, the time point that namely solenoid valve is opened, the C point is taken a seat a little for armature 4.
Use this method to measure the motion delay of solenoid valve, convenient and swift, degree of accuracy is high, without disassembling oil sprayer, can in oil sprayer actual fuel injection process, measure the electromagnet motion delay.
Claims (3)
1. the method for measurement that a solenoid movement postpones is characterized in that: comprises the following steps,
Step a, degree of will speed up sensor (1) is fixed in electromagnet (2) top of solenoid valve, with electromagnet (2), is rigidly connected;
Step b, ECU output solenoid valve driving current, drive solenoid valve;
Step c, used acceleration transducer (1) to gather the oscillating signal of electromagnet (2), after the oscillating signal of electromagnet (2) is amplified, is sent on oscillograph and demonstrates electromagnet vibrational waveform (S2); Use current acquisition equipment to gather the electromagnetic valve driving current signal simultaneously, be sent on oscillograph and demonstrate electromagnetic valve driving current waveform (S1);
Steps d, analyze electromagnet vibrational waveform (S2) and electromagnetic valve driving current waveform (S1), find out the setting in motion time point (A) of armature (4), the setting in motion time point (A) and the electromagnetic valve driving current that calculate the armature (4) of solenoid valve start the time difference Δ t between generation time point (D), are the motion delay time of armature in solenoid valve (4).
2. the method for measurement that solenoid movement as claimed in claim 1 postpones is characterized in that: in described step c, the oscillating signal of the electromagnet (2) that uses charge amplifier to gather acceleration transducer (1) is amplified.
3. the method for measurement that solenoid movement as claimed in claim 1 postpones, it is characterized in that: described current acquisition equipment is current clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310403144.7A CN103437931B (en) | 2013-09-06 | 2013-09-06 | The method of measurement of movement delay of electromagnetic valve |
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| CN201310403144.7A CN103437931B (en) | 2013-09-06 | 2013-09-06 | The method of measurement of movement delay of electromagnetic valve |
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| CN103437931A true CN103437931A (en) | 2013-12-11 |
| CN103437931B CN103437931B (en) | 2015-08-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103850851A (en) * | 2014-01-26 | 2014-06-11 | 北京博润宏达科技发展有限公司 | Method and system for detecting dynamic lift range of gag bit of common-rail oil injector |
| CN104483565A (en) * | 2014-12-03 | 2015-04-01 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Testing device for dynamic performance of actuator |
| CN106199408A (en) * | 2016-06-28 | 2016-12-07 | 哈尔滨工程大学 | Solenoid Valve for Common Rail Systems dynamic response characteristic assay device |
| CN106481493A (en) * | 2015-08-31 | 2017-03-08 | 英飞凌科技股份有限公司 | Fuel injection timing is detected by current sense |
| CN111025050A (en) * | 2019-11-28 | 2020-04-17 | 宁波拓普智能刹车系统有限公司 | Current response time testing device and method for automobile electromagnetic valve |
| CN113156922A (en) * | 2021-05-25 | 2021-07-23 | 三门核电有限公司 | AP1000 nuclear-grade electromagnetic valve action parameter diagnosis device and method |
| CN114563175A (en) * | 2022-02-28 | 2022-05-31 | 浙江工业大学 | Direct detection method for dynamic characteristics of high-speed switch valve |
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| CN103850851A (en) * | 2014-01-26 | 2014-06-11 | 北京博润宏达科技发展有限公司 | Method and system for detecting dynamic lift range of gag bit of common-rail oil injector |
| CN103850851B (en) * | 2014-01-26 | 2017-04-12 | 北京博润宏达科技发展有限公司 | Method and system for detecting dynamic lift range of gag bit of common-rail oil injector |
| CN104483565A (en) * | 2014-12-03 | 2015-04-01 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Testing device for dynamic performance of actuator |
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| CN106481493B (en) * | 2015-08-31 | 2019-09-24 | 英飞凌科技股份有限公司 | Fuel injection timing is detected by current sense |
| CN106199408A (en) * | 2016-06-28 | 2016-12-07 | 哈尔滨工程大学 | Solenoid Valve for Common Rail Systems dynamic response characteristic assay device |
| CN111025050A (en) * | 2019-11-28 | 2020-04-17 | 宁波拓普智能刹车系统有限公司 | Current response time testing device and method for automobile electromagnetic valve |
| CN113156922A (en) * | 2021-05-25 | 2021-07-23 | 三门核电有限公司 | AP1000 nuclear-grade electromagnetic valve action parameter diagnosis device and method |
| CN114563175A (en) * | 2022-02-28 | 2022-05-31 | 浙江工业大学 | Direct detection method for dynamic characteristics of high-speed switch valve |
| CN114563175B (en) * | 2022-02-28 | 2024-05-17 | 浙江工业大学 | Direct detection method for dynamic characteristics of high-speed switch valve |
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Effective date of registration: 20170720 Address after: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee after: China FAW Group Corporation Address before: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee before: Wuxi Oil Pump Nozzle Institute of First Automobile Works |
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