CN103437931B - The method of measurement of movement delay of electromagnetic valve - Google Patents
The method of measurement of movement delay of electromagnetic valve Download PDFInfo
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- CN103437931B CN103437931B CN201310403144.7A CN201310403144A CN103437931B CN 103437931 B CN103437931 B CN 103437931B CN 201310403144 A CN201310403144 A CN 201310403144A CN 103437931 B CN103437931 B CN 103437931B
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- electromagnet
- electromagnetic valve
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- solenoid valve
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Abstract
The invention provides a kind of method of measurement of movement delay of electromagnetic valve, comprise the following steps: degree of will speed up sensor is fixed on the electromagnet top of solenoid valve, is rigidly connected with electromagnet; ECU output solenoid valve driving current, drives solenoid valve; Acceleration transducer is used to gather the oscillating signal of electromagnet, be sent on oscillograph after the oscillating signal of electromagnet is amplified and demonstrate electromagnet vibrational waveform, use current acquisition equipment to gather electromagnetic valve driving current signal simultaneously, be sent on oscillograph and demonstrate electromagnetic valve driving current waveform; Analyze electromagnet vibrational waveform and electromagnetic valve driving current waveform, calculate the time difference Δ t that the setting in motion time point of the armature of solenoid valve and electromagnetic valve driving current start between generation time point.The present invention is used for the measurement of movement delay of electromagnetic valve.
Description
Technical field
The present invention relates to a kind of method of measurement, especially a kind of method of measurement of movement delay of electromagnetic valve.
Background technique
At present for the measurement of the movement delay of electromagnetic valve of oil sprayer, the displacement of armature lever when usually utilizing laser displacement sensor to measure solenoid valve action, need to disassemble fuel injector structure to measure, cannot measure in oil sprayer actual motion process, measurement result can not embody actual motion and postpone.Solenoid valve disclosed in Chinese patent CN101294534B opens and closes the method for measurement of delay situation, and the flex point that the method is just occurred 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; Magnetic valve performance detecting system disclosed in Chinese patent CN101881703A, mentions the movement process adopting pressure transducer or inductive sensor reaction solenoid valve, but does not have specific implementation method in this system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of measurement of movement delay of electromagnetic valve is provided, by the measurement of the oscillating signal of the electromagnet to solenoid valve, find out the setting in motion time point of armature, calculate the time difference Δ t that the setting in motion time point of the armature of solenoid valve and electromagnetic valve driving current start between generation time point, be the motion delay time of armature in solenoid valve.The technical solution used in the present invention is:
A method of measurement for movement delay of electromagnetic valve, comprises the following steps,
Step a, degree of will speed up sensor is fixed on the electromagnet top of solenoid valve, is rigidly connected with electromagnet;
Step b, ECU output solenoid valve driving current, drives solenoid valve;
Step c, uses acceleration transducer to gather the oscillating signal of electromagnet, is sent on oscillograph and demonstrates electromagnet vibrational waveform after being amplified by the oscillating signal of electromagnet; Use current acquisition equipment to gather electromagnetic valve driving current signal simultaneously, be sent on oscillograph and demonstrate 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, calculate the time difference Δ t that the setting in motion time point of the armature of solenoid valve and electromagnetic valve driving current start between generation time point, be the motion delay time of armature in solenoid valve.
Further, in described step c, the oscillating signal of charge amplifier to the electromagnet of acceleration transducer collection is used to amplify.
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 the need to disassembling oil sprayer, can measure electromagnet motion delay in oil sprayer actual fuel injection process.
Accompanying drawing explanation
Fig. 1 is the electromagnetic valve structure schematic diagram of 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, first degree of will speed up sensor 1 is fixed on electromagnet 2 top of solenoid valve to the system measured, and is rigidly connected with electromagnet 2; Acceleration transducer 1 is connected to charge amplifier by concentric cable BNC connector line; Charge amplifier amplifies for the oscillating signal of the electromagnet 2 that degree of will speed up sensor 1 gathers, the output termination oscillograph of charge amplifier.ECU(electronic control unit) connected electromagnetic valve, provide driving current to solenoid valve; Current clamp gathers electromagnetic valve driving current signal, and outputs on oscillograph and demonstrate electromagnetic valve driving current waveform S1.
When solenoid valves, electromagnet 2 can produce suction, adhesive armature 4, and the vibration produced in the process of adhesive armature 4 and when electromagnet 2 collides with armature 4 is gathered by acceleration transducer 1, thus reflects the movement process of whole solenoid valve.Concrete principle is as follows: after the solenoid valves of oil sprayer, and electromagnet 2 produces electromagnetic attraction, attracts armature 4 to move upward; Effect due to power is mutual, and electromagnet 2 is also subject to the suction F1 of armature 4 to it, and this suction F1 is downward; Electromagnet 2 is subject to spring 3 to its elastic force F2 upwards simultaneously, and due to now F1>F2, so electromagnet 2 totally making a concerted effort downwards of being now subject to, the acceleration direction that so electromagnet 2 is initial is downward.When armature 4 moves upward to the moment that peak and electromagnet 2 collide, electromagnet 2 also receives the impact force upwards of armature 4 to it, what now electromagnet 2 was subject to totally makes a concerted effort upwards, electromagnet 2 acceleration is now relative to acceleration before, will be oppositely, and owing to clashing into, numerical value is larger.After the solenoid valve power-off of oil sprayer, armature 4 will move downward, and electromagnet 2 is subject to spring 3 to its elastic force F2 upwards, and electromagnet 2 is totally made a concerted effort upwards.The stressing conditions of electromagnet 2 determines the acceleration of electromagnet 2, and the acceleration change of electromagnet 2 reflects the Vibration Condition of electromagnet 2.
Measure the oscillating signal (being reflected the situation of vibration by the change of acceleration measurement) of electromagnet 2 and demonstrate electromagnet vibrational waveform S2 over the display.Analyze electromagnet vibrational waveform S2, the start time of the initial acceleration of the corresponding electromagnet 2 of this point of setting in motion time point A(of armature 4 can be found out), as shown in the A point of electromagnet vibrational waveform S2 in Fig. 3.
When giving the solenoid valves of oil sprayer, measuring electromagnetic valve driving current signal simultaneously, finding 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, is the motion delay time of armature 4 in solenoid valve.Movement delay of electromagnetic valve just refers to the motion delay time of armature 4 in solenoid valve usually.
Concrete measurement procedure is as follows:
A.) degree of will speed up sensor 1 is fixed on electromagnet 2 top of solenoid valve, is rigidly connected with electromagnet 2;
B.) ECU output solenoid valve driving current, drives 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 after charge amplifier amplifies and demonstrates electromagnet vibrational waveform S2; Use current clamp to gather electromagnetic valve driving current signal simultaneously, be sent on oscillograph and demonstrate electromagnetic valve driving current waveform S1;
D.) electromagnet vibrational waveform S2 and electromagnetic valve driving current waveform S1 is analyzed, find out the setting in motion time point A of armature 4, calculate the time difference Δ t that the setting in motion time point A of the armature 4 of solenoid valve and electromagnetic valve driving current start between generation time point D, be the motion delay time of armature 4 in solenoid valve.
In above-mentioned steps c, other current acquisition equipment also can be used to gather electromagnetic valve driving current signal.
In figure 3, A point is the setting in motion time point of armature 4, and B point moves to peak and electromagnet 2 time of collision point for armature 4, and the time point of namely solenoid valve unlatching, 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 the need to disassembling oil sprayer, can measure electromagnet motion delay in oil sprayer actual fuel injection process.
Claims (3)
1. a method of measurement for movement delay of electromagnetic valve, is characterized in that: comprise the following steps,
Step a, degree of will speed up sensor (1) is fixed on electromagnet (2) top of solenoid valve, is rigidly connected with electromagnet (2);
Step b, ECU output solenoid valve driving current, drives solenoid valve;
Step c, uses acceleration transducer (1) to gather the oscillating signal of electromagnet (2), is sent on oscillograph and demonstrates electromagnet vibrational waveform (S2) after being amplified by the oscillating signal of electromagnet (2); Use current acquisition equipment to gather 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), calculate the time difference Δ t that the setting in motion time point (A) of the armature (4) of solenoid valve and electromagnetic valve driving current start between generation time point (D), be the motion delay time of solenoid valve.
2. the method for measurement of movement delay of electromagnetic valve as claimed in claim 1, is characterized in that: in described step c, uses the oscillating signal of charge amplifier to the electromagnet (2) that acceleration transducer (1) gathers to amplify.
3. the method for measurement of movement delay of electromagnetic valve as claimed in claim 1, is characterized in that: described current acquisition equipment is current clamp.
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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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| CN103437931B true CN103437931B (en) | 2015-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| US10087866B2 (en) | 2015-08-31 | 2018-10-02 | Infineon Technologies Ag | Detecting fuel injector timing with current sensing |
| 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***有限公司 | Current response time testing device and method for automobile electromagnetic valve |
| CN113156922B (en) * | 2021-05-25 | 2022-07-08 | 三门核电有限公司 | AP1000 nuclear-grade electromagnetic valve action parameter diagnosis device and method |
| 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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| CN102213172A (en) * | 2010-04-07 | 2011-10-12 | 马涅蒂-马瑞利公司 | Method for determining the closing time of an electromagnetic fuel injector |
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| JP2007255347A (en) * | 2006-03-24 | 2007-10-04 | Honda Motor Co Ltd | Device for determining state of injector |
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| GB2262809A (en) * | 1991-12-24 | 1993-06-30 | Bosch Gmbh Robert | Measuring the mechanical movement of a solenoid valve armature |
| US6745465B1 (en) * | 1994-05-11 | 2004-06-08 | Caterpillar Inc | Method for assembling an apparatus, such as a fuel injector, using select fit of dimensional control features |
| 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 |
| CN101688624A (en) * | 2007-07-06 | 2010-03-31 | 罗伯特·博世有限公司 | Method for determining a position of an armature in a solenoid valve and a device for operating a solenoid valve with an armature |
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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 |