CN202811165U - Ignition coil output voltage evaluating system - Google Patents
Ignition coil output voltage evaluating system Download PDFInfo
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- CN202811165U CN202811165U CN 201220416839 CN201220416839U CN202811165U CN 202811165 U CN202811165 U CN 202811165U CN 201220416839 CN201220416839 CN 201220416839 CN 201220416839 U CN201220416839 U CN 201220416839U CN 202811165 U CN202811165 U CN 202811165U
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Abstract
The utility model discloses an ignition coil output voltage evaluating system which comprises a test spark plug, a voltage probe, a current probe, a data recorder, an invalid value processing unit, and a processor. Two electrodes of the test spark plug are respectively connected with two secondary ends of an ignition coil. When the two electrodes of the test spark plug are respectively connected with the two secondary ends of the ignition coil, the voltage probe is used for testing the maximum value of ignition voltages of the ignition coil. The current probe is used for testing ignition currents. The data recorder is used for enabling the maximum value of the ignition voltages and the ignition currents under revolving speeds of various engines to be output to the invalid value processing unit. The invalid value processing unit is used for obtaining combination gas limit breakdown voltages under effective engine revolving speeds. The processor is used for enabling the maximum output voltage of the ignition coil under the effective engine revolving speeds to be compared with the combination gas limit breakdown voltages, and outputting evaluation results. The ignition coil output voltage evaluating system can precisely evaluate the output voltages of the ignition coil.
Description
Technical field
The utility model relates to automotive electronic technology, particularly a kind of spark coil output voltage evaluating system.
Background technique
Spark coil is one of kernel component of petrol engine fire road system, and its performance has determined directly whether motor can reliable ignition.For spark coil, two parameters are particularly crucial, and one is the output voltage of spark coil, has determined directly whether mixed gas can effectively be punctured, and another is exactly the output energy of spark coil, has determined directly whether the endurance of spark is enough long; Under the lean combustion state, because chemical energy is very weak, sufficiently long spark duration can fully heat its peripheral mixed gas, improves the temperature of mixed gas, helps the release of chemical energy, reduces fire loss ratio; But for the PFI(Port Fuel Injection of domestic market main flow, intake port injection) motor, because its air fuel ratio all is controlled at about 1.0, chemical energy is enough strong, the output energy of spark coil is not clearly on the impact of igniting process.Therefore, the output voltage of spark coil is only parameter the most key in the igniting process.
The evaluation criteria of spark coil output voltage is:
The maximum output voltage of spark coil is greater than the mixed gas limit breakdown voltage on the real vehicle, considers the vehicle scattered error, also will leave certain safe clearance between the two.
The maximum output voltage of a certain duration of charge down-firing coil can directly measure by external high insulating medium vacuum capacitance;
Mixed gas limit breakdown voltage will be by the simulation of different driving cycles, and comprehensive statistics goes out corresponding mixed gas breakdown voltage maximum value under each rotating speed.
As seen, in the spark coil output voltage evaluation test, obtaining of mixed gas limit breakdown voltage is link the most key in the whole test.Studies show that the breakdown voltage of mixed gas can be described with following formula in " Spark Anemometry of Bulk Gas Velocity at the Plug gap of a firing engine ":
Wherein, K=1.5 * 10
4KVcm
2/ g, a=10
-4G/cm
2, 1g/cm
2=0.980665mbar;
The corresponding cylinder of p-ignition timing is pressed; d
g-spark clearance;
From (1) formula as seen, the breakdown voltage of mixed gas mainly and spark clearance is big or small and the ignition timing cylinder is pressed into direct ratio.
Spark coil output voltage appraisal procedure, with the spark coil maximum output voltage under each engine speed and the contrast of mixed gas limit breakdown voltage, if under each engine speed, the spark coil maximum output voltage deducts the difference of mixed gas limit breakdown voltage all greater than setting voltage, and then the spark coil output voltage satisfies the engine igniting system requirement.Setting voltage is empirical value, usually at 2KV between the 6KV, as being 2KV, 4KV or 6KV.
Existing spark coil output voltage assessment mode, definite mode of the mixed gas limit breakdown voltage value under one rotating speed is: the clearance limit spark plug in the employing product life cycle is as the test spark plug, change engine load, gather the ignition coil voltage max in igniting process under this rotating speed at motor maximum load point, ignition coil voltage max under this rotating speed that collects in igniting process is the mixed gas limit breakdown voltage value under this rotating speed.
Existing spark coil output voltage assessment mode, because when gathering under the rotating speed ignition coil voltage max in igniting process, the situation of catching fire of motor can occur, catch fire may be since mixed gas do not have breakdown due to, also might be due to flow perturbation is crumbled and fall in the fiery nuclear proliferation process, if the ignition coil voltage max under this rotating speed that collects in igniting process just at the right time corresponding mixed gas does not have breakdown situation, ignition coil voltage max under this rotating speed that collects so in igniting process is exactly the mixed gas limit breakdown voltage value under wrong this rotating speed, therefore with the ignition coil voltage max in igniting process under this rotating speed that collects directly as the limit breakdown voltage value of mixed gas under this rotating speed, carry out follow-up statistical analysis, just be difficult to the spark coil output voltage is carried out precise evaluation.
The model utility content
The technical problems to be solved in the utility model is to carry out precise evaluation to the spark coil output voltage.
For solving the problems of the technologies described above, the utility model provides a kind of spark coil output voltage evaluating system, and this system comprises a test spark plug, a voltage probe, a current probe, a data logger, an invalid value processing unit, a processor;
Described test spark plug, two electrodes are used for the respectively secondary two ends of contact fire coil;
Described voltage probe is when the secondary two ends of described test spark plug two electrodes difference contact fire coil, for detection of the described test spark plug two interelectrode voltages in igniting process;
Described current probe is for detection of the electric current of described test spark plug one electrode in igniting process to ignition coil secondary one end;
Described data logger, be used for the recording engine rotating speed, described test spark plug two interelectrode voltages in the igniting process, described test spark plug one electrode in the igniting process is to the electric current of ignition coil secondary one end, maximum voltage with described test spark plug two interpolars in igniting process under each engine speed, as the ignition coil voltage max in igniting process under each engine speed, output to described invalid value processing unit, with described test spark plug one electrode in igniting process under each engine speed to the electric current of ignition coil secondary one end, as the initial firing current in igniting process under each engine speed, output to described invalid value processing unit;
Described invalid value processing unit, be used for according under each engine speed under the ignition coil voltage max of igniting process, each engine speed the initial firing current in igniting process, obtain the mixed gas limit breakdown voltage under each effective engine speed, output to described processor;
The concrete mode that obtains the mixed gas limit breakdown voltage under each effective engine speed is: under the engine speed, if in the igniting process at ignition coil voltage max place, oppositely then this engine speed and institute's corresponding points fire coil ignition voltage maximum value are removed as invalid value appears in initial firing current; Then with the ignition coil voltage max under each engine speed of having removed invalid value, as the mixed gas limit breakdown voltage under each effective engine speed;
Described processor, be used for the spark coil maximum output voltage under each effective engine speed and the contrast of mixed gas limit breakdown voltage, if under each effective engine speed, the spark coil maximum output voltage deducts the difference of mixed gas limit breakdown voltage all greater than setting voltage, and then output point fire coil output voltage satisfies engine igniting system requirement signal.
Better, described test spark plug is the clearance limit spark plug in the Life cycle.
Better, spark coil output voltage evaluating system also comprises an insulation vacuum capacitance;
Described insulation vacuum capacitance is used at described test sparking-plug electrode during with secondary the disconnecting of spark coil, and two ends are the secondary two ends of contact fire coil respectively;
Described voltage probe when the secondary two ends of described insulation vacuum capacitance two ends difference contact fire coil, detects the voltage that obtains between described insulation vacuum capacitance two ends;
Described data logger, also be used for the voltage between recording engine rotating speed, insulation vacuum capacitance two ends, with the maximum voltage between insulation vacuum capacitance two ends under each engine speed, the spark coil maximum output voltage as under each engine speed outputs to described processor.
Spark coil output voltage evaluating system of the present utility model, not only detect under each engine speed, ignition coil voltage max in igniting process, also detect under each engine speed, initial firing current in igniting process gathers the ignition coil voltage max in the igniting process, initial firing current and corresponding engine rotational speed signal and is used for follow-up statistical analysis by data logger; In follow-up statistical analysis, corresponding ignition coil voltage max is appearred when reverse in initial firing current to be removed as invalid value, with the ignition coil voltage max under each engine speed of having removed invalid value, as the mixed gas limit breakdown voltage under each effective engine speed, to assessing of spark coil output voltage.Spark coil output voltage appraisal procedure of the present utility model and system, can accurately identify the igniting process of the not breakdown state of mixed gas, delete its corresponding ignition coil voltage max, greatly reduce the error rate that mixed gas limit breakdown voltage gathers, improved assess effectiveness and the accuracy of spark coil output voltage.
Description of drawings
In order to be illustrated more clearly in the technical solution of the utility model, the below does simple the introduction to the accompanying drawing of the required use of the utility model, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is spark coil maximum output voltage, the mixed gas limit breakdown voltage plotted curve under each effective engine speed;
Fig. 2 is spark coil output voltage evaluating system one embodiment's schematic representation of the present utility model;
Fig. 3 is the concrete mode schematic representation that spark coil output voltage evaluating system one embodiment of the present utility model obtains the mixed gas limit breakdown voltage under each effective engine speed.
Embodiment
Below in conjunction with accompanying drawing, the technological scheme in the utility model is carried out clear, complete description, obviously, described embodiment is a part of embodiment of the present utility model, rather than whole embodiments.Based on the embodiment in the utility model, all other embodiments that those of ordinary skills obtain under the prerequisite of not making creative work belong to the scope that the utility model is protected.
Embodiment one
As shown in Figure 2, spark coil output voltage evaluating system comprises a test spark plug, a voltage probe, a current probe, a data logger, an invalid value processing unit, a processor;
Described test spark plug, two electrodes are used for the respectively secondary two ends of contact fire coil, and be better, and the test spark plug is the clearance limit spark plug in the Life cycle;
Described voltage probe is when the secondary two ends of described test spark plug two electrodes difference contact fire coil, for detection of the described test spark plug two interelectrode voltages in igniting process;
Described current probe is for detection of the electric current of described test spark plug one electrode in igniting process to ignition coil secondary one end;
Described data logger, be used for the recording engine rotating speed, described test spark plug two interelectrode voltages in the igniting process, described test spark plug one electrode in the igniting process is to the electric current of ignition coil secondary one end, maximum voltage with described test spark plug two interpolars in igniting process under each engine speed, as the ignition coil voltage max in igniting process under each engine speed, output to described invalid value processing unit, with described test spark plug one electrode in igniting process under each engine speed to the electric current of ignition coil secondary one end, as the initial firing current in igniting process under each engine speed, output to described invalid value processing unit;
Described invalid value processing unit, be used for according under each engine speed under the ignition coil voltage max of igniting process, each engine speed the initial firing current in igniting process, obtain the mixed gas limit breakdown voltage under each effective engine speed, output to described processor;
As shown in Figure 3, the concrete mode that obtains the mixed gas limit breakdown voltage under each effective engine speed is: under the engine speed, if in the igniting process at ignition coil voltage max place, oppositely then this engine speed and institute's corresponding points fire coil ignition voltage maximum value are removed as invalid value appears in initial firing current; Then with the ignition coil voltage max under each engine speed of having removed invalid value, as the mixed gas limit breakdown voltage under each effective engine speed;
Described processor, be used for the spark coil maximum output voltage under each effective engine speed and the contrast of mixed gas limit breakdown voltage, if under each effective engine speed, the spark coil maximum output voltage deducts the difference of mixed gas limit breakdown voltage all greater than setting voltage, and then output point fire coil output voltage satisfies engine igniting system requirement signal; Setting voltage usually at 2kV between the 6kV, as being 2kV, 4kV or 6kV.
Embodiment two
Based on embodiment one, spark coil output voltage evaluating system also comprises an insulation vacuum capacitance;
Described insulation vacuum capacitance is used at described test sparking-plug electrode during with secondary the disconnecting of spark coil, and two ends are the secondary two ends of contact fire coil respectively;
Described voltage probe when the secondary two ends of described insulation vacuum capacitance two ends difference contact fire coil, detects the voltage that obtains between described insulation vacuum capacitance two ends;
Described data logger, also be used for the voltage between recording engine rotating speed, insulation vacuum capacitance two ends, with the maximum voltage between insulation vacuum capacitance two ends under each engine speed, the spark coil maximum output voltage as under each engine speed outputs to described processor.
Spark coil output voltage evaluating system of the present utility model, not only detect under each engine speed, ignition coil voltage max in igniting process, also detect under each engine speed, initial firing current in igniting process gathers the ignition coil voltage max in the igniting process, initial firing current and corresponding engine rotational speed signal and is used for follow-up statistical analysis by data logger; In follow-up statistical analysis, corresponding ignition coil voltage max is appearred when reverse in initial firing current to be removed as invalid value, with the ignition coil voltage max under each engine speed of having removed invalid value, as the mixed gas limit breakdown voltage under each effective engine speed, to assessing of spark coil output voltage.Spark coil output voltage evaluating system of the present utility model, can accurately identify the igniting process of the not breakdown state of mixed gas, delete its corresponding ignition coil voltage max, greatly reduce the error rate that mixed gas limit breakdown voltage gathers, improved assess effectiveness and the accuracy of spark coil output voltage.
It is as follows to identify the not breakdown principle of mixed gas:
In the normal ignition process, spark plug two electrode gaps formed the plasma jet passage when mixed gas punctured, and discharge voltage decays to rapidly stationary value after reaching peak value, and the linear attenuation state of discharge current also progressively decays to zero;
In the igniting process, when mixed gas is not breakdown (by cylinder endoscope sem observation spark clearance without arc column), the discharge voltage ripple forms the semisinusoidal waveform, and discharge current reaches decayed rapidly zero-bit behind the peak value and back current occurred; This phenomenon can be interpreted as spark coil to the discharge process of spark plug the two poles of the earth capacitor charging and electric capacity self.The discharge starting stage, along with the increase of discharge voltage, a large amount of free electrons discharge from sparking-plug electrode, and electric current moment reaches peak value; Afterwards, further increase along with the spark coil output voltage, the positive charge quantity that spark-plug side electrode gathers is more and more, the voltage difference of lateral electrode and spark coil output terminal begins to reduce, discharge current is decayed gradually, and when output voltage reached maximum value, the electromotive force of lateral electrode and spark coil output terminal was substantially equal, discharge current decays to zero, and it is complete to charge; Along with the reduction of spark coil output voltage, the electromotive force of lateral electrode is higher than the electromotive force of spark coil output terminal, has entered into the discharge process of electric capacity this moment, and discharge current begins to occur oppositely; Along with the further reduction of output voltage, back current increases gradually; Finally along with the release of electric charge on the two poles of the earth totally, discharge current decays to again zero.
In order to verify that further the breakdown conditions discharge voltage does not become this characteristic with electric current, direct output terminal at spark coil accesses an insulating medium vacuum capacitor, and (voltage reaches 60kV could be breakdown, the output voltage of spark coil is no more than at most 40kV), observe discharge voltage and current waveform under the breakdown conditions not, can find out that the waveform under the breakdown conditions is not in full accord at the insulation discharge voltage of vacuum capacitance and current waveform and real vehicle mixed gas for spark coil.Therefore, can have or not by discharge current and oppositely come the reliable recognition mixed gas whether effectively to be punctured.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the scope of the utility model protection.
Claims (6)
1. a spark coil output voltage evaluating system is characterized in that, comprises a test spark plug, a voltage probe, a current probe, a data logger, an invalid value processing unit, a processor;
Described test spark plug, two electrodes are used for the respectively secondary two ends of contact fire coil;
Described voltage probe is when the secondary two ends of described test spark plug two electrodes difference contact fire coil, for detection of the described test spark plug two interelectrode voltages in igniting process;
Described current probe is for detection of the electric current of described test spark plug one electrode in igniting process to ignition coil secondary one end;
Described data logger, be used for the recording engine rotating speed, described test spark plug two interelectrode voltages in the igniting process, described test spark plug one electrode in the igniting process is to the electric current of ignition coil secondary one end, maximum voltage with described test spark plug two interpolars in igniting process under each engine speed, as the ignition coil voltage max in igniting process under each engine speed, output to described invalid value processing unit, with described test spark plug one electrode in igniting process under each engine speed to the electric current of ignition coil secondary one end, as the initial firing current in igniting process under each engine speed, output to described invalid value processing unit;
Described invalid value processing unit, be used for according under each engine speed under the ignition coil voltage max of igniting process, each engine speed the initial firing current in igniting process, obtain the mixed gas limit breakdown voltage under each effective engine speed, output to described processor;
Described processor, be used for the spark coil maximum output voltage under each effective engine speed and the contrast of mixed gas limit breakdown voltage, if under each effective engine speed, the spark coil maximum output voltage deducts the difference of mixed gas limit breakdown voltage all greater than setting voltage, and then output point fire coil output voltage satisfies engine igniting system requirement signal.
2. spark coil output voltage evaluating system according to claim 1 is characterized in that,
The concrete mode that described invalid value processing unit obtains the mixed gas limit breakdown voltage under each effective engine speed is: under the engine speed, if in the igniting process at ignition coil voltage max place, oppositely then this engine speed and institute's corresponding points fire coil ignition voltage maximum value are removed as invalid value appears in initial firing current; Then with the ignition coil voltage max under each engine speed of having removed invalid value, as the mixed gas limit breakdown voltage under each effective engine speed
3. spark coil output voltage evaluating system according to claim 1 is characterized in that,
Described test spark plug is the clearance limit spark plug in the Life cycle.
4. spark coil output voltage evaluating system according to claim 1 is characterized in that,
Spark coil output voltage evaluating system also comprises an insulation vacuum capacitance;
Described insulation vacuum capacitance is used at described test sparking-plug electrode during with secondary the disconnecting of spark coil, and two ends are the secondary two ends of contact fire coil respectively;
Described voltage probe when the secondary two ends of described insulation vacuum capacitance two ends difference contact fire coil, detects the voltage that obtains between described insulation vacuum capacitance two ends;
Described data logger, also be used for the voltage between recording engine rotating speed, insulation vacuum capacitance two ends, with the maximum voltage between insulation vacuum capacitance two ends under each engine speed, the spark coil maximum output voltage as under each engine speed outputs to described processor.
5. according to claim 1 to 4 each described spark coil output voltage evaluating systems, it is characterized in that,
Described setting voltage at 2 kV between 6 kV.
6. spark coil output voltage evaluating system according to claim 5 is characterized in that,
Described setting voltage is 2 kV, 4 kV or 6 kV.
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| CN 201220416839 CN202811165U (en) | 2012-08-21 | 2012-08-21 | Ignition coil output voltage evaluating system |
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| CN 201220416839 CN202811165U (en) | 2012-08-21 | 2012-08-21 | Ignition coil output voltage evaluating system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852694A (en) * | 2012-08-21 | 2013-01-02 | 联合汽车电子有限公司 | Method and system for estimating output voltage of ignition coil |
| CN103437933A (en) * | 2013-08-09 | 2013-12-11 | 浙江吉利汽车研究院有限公司 | Motor ignition device and ignition method |
| CN104265540A (en) * | 2014-09-19 | 2015-01-07 | 太仓荣南密封件科技有限公司 | High-tension test apparatus for automobile ignition coil |
| CN104791170A (en) * | 2015-03-19 | 2015-07-22 | 北京博曼迪汽车科技有限公司 | Ignition coil test method and device |
| CN112761845A (en) * | 2021-01-20 | 2021-05-07 | 联合汽车电子有限公司 | Ignition coil output energy assessment method and test system thereof |
-
2012
- 2012-08-21 CN CN 201220416839 patent/CN202811165U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852694A (en) * | 2012-08-21 | 2013-01-02 | 联合汽车电子有限公司 | Method and system for estimating output voltage of ignition coil |
| CN102852694B (en) * | 2012-08-21 | 2015-09-30 | 联合汽车电子有限公司 | Spark coil output voltage appraisal procedure and system |
| CN103437933A (en) * | 2013-08-09 | 2013-12-11 | 浙江吉利汽车研究院有限公司 | Motor ignition device and ignition method |
| CN103437933B (en) * | 2013-08-09 | 2016-08-10 | 浙江吉利汽车研究院有限公司 | A kind of engine ignitor and ignition method |
| CN104265540A (en) * | 2014-09-19 | 2015-01-07 | 太仓荣南密封件科技有限公司 | High-tension test apparatus for automobile ignition coil |
| CN104265540B (en) * | 2014-09-19 | 2016-04-20 | 太仓荣南密封件科技有限公司 | A kind of automobile ignition coil high-tension testing apparatus |
| CN104791170A (en) * | 2015-03-19 | 2015-07-22 | 北京博曼迪汽车科技有限公司 | Ignition coil test method and device |
| CN112761845A (en) * | 2021-01-20 | 2021-05-07 | 联合汽车电子有限公司 | Ignition coil output energy assessment method and test system thereof |
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Granted publication date: 20130320 Effective date of abandoning: 20150930 |
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| RGAV | Abandon patent right to avoid regrant |