CN203809192U - Ignition testing system based on operation state of engine - Google Patents
Ignition testing system based on operation state of engine Download PDFInfo
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- CN203809192U CN203809192U CN201420216111.1U CN201420216111U CN203809192U CN 203809192 U CN203809192 U CN 203809192U CN 201420216111 U CN201420216111 U CN 201420216111U CN 203809192 U CN203809192 U CN 203809192U
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Abstract
The utility model relates to an ignition testing system based on the operation state of an engine. The ignition testing system comprises the natural gas engine and an ignition coil disassembled from the natural gas engine; a sparking plug of the natural gas engine is connected with a secondary coil of the ignition coil through a testing high-voltage wire, and a primary coil of the ignition coil is connected with the output end of an electronic control unit; the testing high-voltage line is provided with a voltage divider and a current transformer which are both connected with a displaying, recording and processing device, under the operation condition of the natural gas engine, the displaying, recording and processing device displays and outputs voltages waveforms obtained by the voltage divider and the current waveforms obtained by the current transformer and performs operation to obtain ignition energy, and the voltage waveforms, the current waveforms and the ignition energy under the corresponding testing operation condition are related and stored. The ignition testing system is convenient to operate, can conduct ignition testing under the operation state of the engine, can effectively test the engine and is safe and reliable.
Description
Technical field
The utility model relates to a kind of igniting test system, especially a kind of igniting test system based under engine operating state, specifically, to take engine operating state that rock gas is single-fuel directly igniting test system and the test method of test, belong to the technical field of Engine Block Test.
Background technique
For take the motor that rock gas is single-fuel, except anti-interference and guarantee that engine ignition shifts to an earlier date characteristic, motor to four of ignition system requirements is: secondary voltage climbing, secondary ceiling voltage, ignition energy and spark duration, wherein ignition energy is the comprehensive parameter of an above four indices of reflection, and the test by ignition energy comes the design of evaluation point ignition system whether to meet the requirement of motor.
At present, test ignition energy generally all carries out off-line test on test bench, utilizes signal generator to produce square signal and simulates ECU(electronic control unit) fire signal, square signal after amplification circuit amplifies, drive ignition coil working.The secondary end of spark coil connects the process that Zener (Zener) diode discharges simulated fire spark plug ignition, records the voltage and current of ignition coil secondary with voltage probe and current probe, through calculating ignition energy.
When now motor is tested, ability that can only test point fire coil, cannot test whole ignition system.In fact, the igniting of natural gas engine, combustion process are extremely complicated, and the voltage of igniting, electric current also constantly change, and existing test method cannot be measured the ignition voltage, the electric current that constantly change in the firing chamber of engine high-temperature, high pressure.Therefore the result of test can not accurately reflect the working state of spark coil, for the excessive situation of design redundancy, just cannot find.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of igniting test system based under engine operating state is provided, and it is easy to operate, the test of lighting a fire under engine operating state, can effectively test motor, safe and reliable.
The technological scheme providing according to the utility model, the described igniting test system based under engine operating state, comprises and is installed on the natural gas engine on stand and tears open certainly in the spark coil of described natural gas engine, the spark plug of described natural gas engine is connected with the secondary winding of spark coil by testing high voltage line, and the primary air of spark coil is connected with the output terminal of the electronic control unit of described natural gas engine, on testing high voltage line, be provided with for the voltage divider of acquisition point fire coil secondary coil voltage and for the current transformer of acquisition point fire coil secondary current, described voltage divider and current transformer are all connected with demonstration record processing unit, under the operating conditions of natural gas engine, show the voltage waveform that record processing unit obtains voltage divider, the current waveform display output that current transformer obtains, union obtains ignition energy, and by the voltage waveform under above-mentioned corresponding test operating mode, current waveform and ignition energy carry out association store.
Described demonstration record processing unit comprises oscillograph and the upper-position unit being connected with described oscillograph; Oscillograph is connected with voltage divider, current transformer, with voltage waveform, the current waveform that shows that output is corresponding; The current waveform computing that the voltage waveform that oscillograph obtains according to voltage divider, current transformer obtain obtains ignition energy; Oscillograph transfers to voltage waveform, current waveform and the ignition energy of above-mentioned demonstration output in upper-position unit, voltage waveform, current waveform and ignition energy under the corresponding operating conditions of natural gas engine are carried out to association store in upper-position unit.
The power end of described electronic control unit is connected with power supply.
Described natural gas engine comprises electronic control unit, spark coil and spark plug; In natural gas engine, split out spark coil, the output terminal of electronic control unit is connected with the primary air of spark coil; Spark coil, voltage divider and current transformer are all fixed on natural gas engine.
Advantage of the present utility model: the spark coil of natural gas engine is split out, and be connected with spark plug by Hi-pot test line, under natural gas engine running state, pass through voltage divider, current transformer obtains respectively voltage waveform and current waveform, by oscilloscope display, export corresponding waveform, by upper-position unit, carry out association store, thereby can access high temperature, the ignition voltage constantly changing in the firing chamber of high pressure, electric current, performance parameter that not only can test point fire coil, can also test the breakdown voltage of spark plug, the actual working state of reflection ignition system, can evaluation point fire coil, whether spark plug meet engine performance requirement, the trend can analysis site fire performance parameter changing with engine operating condition, by the waveform of ignition voltage, electric current, can assist to analyze engine cylinder combustion process, easy to operate, improve the validity of test, safe and reliable.
Accompanying drawing explanation
Fig. 1 is test connection diagram of the present utility model.
Fig. 2 is the utility model connection test circuit schematic diagram.
Fig. 3 is flow chart of the present utility model.
Description of reference numerals: 1-natural gas engine, 2-power supply, 3-electronic control unit, 4-spark coil, 5-spark plug, 6-voltage divider, 7-current transformer, 8-Hi-pot test line, 9-oscillograph and 10-upper-position unit.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As depicted in figs. 1 and 2: for the test of lighting a fire under engine operating state, can effectively test motor, the utility model comprises the natural gas engine 1 being installed on stand and tears open certainly in the spark coil 4 of described natural gas engine 1, the spark plug 5 of described natural gas engine 1 is connected with the secondary winding of spark coil 4 by testing high voltage line 8, and the primary air of spark coil 4 is connected with the output terminal of the electronic control unit 3 of described natural gas engine 1, on testing high voltage line 8, be provided with for the voltage divider 6 of acquisition point fire coil 4 secondary coil voltage and for the current transformer 7 of acquisition point fire coil 4 secondary currents, described voltage divider 6 and current transformer 7 are all connected with demonstration record processing unit, under the operating conditions of natural gas engine 1, show the voltage waveform that record processing unit obtains voltage divider 6, the current waveform display output that current transformer 7 obtains, union obtains ignition energy, and by the voltage waveform under above-mentioned corresponding test operating mode, current waveform and ignition energy carry out association store.
Particularly, spark coil 4 is assemblied on natural gas engine 1 originally, by spark coil 4 after natural gas engine 1 splits out, working principle and effect before can holding point fire coil 4, and be convenient to follow-up measurement requirement.Electronic control unit 3 is according to the operating conditions of natural gas engine 1, to the primary air of spark coil 4, export corresponding control signal, with the secondary winding by spark coil 4, on spark plug 5, load high pressure, thereby realize spark plug 5, in the firing chamber of natural gas engine 1, light a fire.Spark coil 4 is carried in high pressure on spark plug 5 and in the firing chamber of natural gas engine 1 after igniting, by voltage divider 6 and current transformer 7, can obtain corresponding voltage signal, current signal, by showing the demonstration of record processing unit, export, can observe intuitively the every test voltage under natural gas engine 1 running state, current waveform value, and by simple integral operation, obtain ignition ability value, by the voltage waveform under the corresponding operating mode of natural gas engine 1, current waveform and ignition energy carry out association store, can be convenient to the running state test process of whole natural gas engine 1 to review, and the working procedure of whole natural gas engine 1 is understood further.In the utility model embodiment, described association store refers to stores parameter, voltage waveform, current waveform and the ignition energy of current natural gas engine 1 operating conditions one to one.
Described demonstration record processing unit comprises oscillograph 9 and the upper-position unit 10 being connected with described oscillograph 9; Oscillograph 9 is connected with voltage divider 6, current transformer 7, with voltage waveform, the current waveform that shows that output is corresponding; The current waveform computing that the voltage waveform that oscillograph 9 obtains according to voltage divider 6, current transformer 7 obtain obtains ignition energy; Oscillograph 9 transfers to voltage waveform, current waveform and the ignition energy of above-mentioned demonstration output in upper-position unit 10, voltage waveform, current waveform and ignition energy under the corresponding operating conditions of natural gas engine 1 are carried out to association store upper-position unit 10 is interior.
The power end of described electronic control unit 3 is connected with power supply 2.Described power supply 2 provides the operating voltage of electronic control unit (ECU) 3.
As shown in Figure 3, a kind of igniting test method based under engine operating state, described igniting test method comprises the steps:
A, provide complete natural gas engine to be tested 1, and described natural gas engine 1 is installed on stand, to guarantee the normal operation of natural gas engine 1;
The natural gas engine 1 of complete tape test comprises electronic control unit 3, spark coil 4 and spark plug 5; Certainly, also comprise that some connect the wire harness of use.After natural gas engine 1 is installed on stand, detect whether normal operation of natural gas engine 1, when natural gas engine 1 can normally move, just can carry out the igniting test under follow-up running state.In the utility model embodiment, after natural gas engine 1 is installed on stand, natural gas engine 1 is connected with electric dynamometer, and the adjusting that can realize by controlling the aperture of rotating speed and gas pedal the operating mode of natural gas engine 1 converts.
B, split out the spark coil 4 of natural gas engine 1, and the secondary winding of described spark coil 4 is connected with the spark plug 5 on natural gas engine 1 by Hi-pot test line 8, voltage divider 6 and current transformer 7 are set on Hi-pot test line 8, voltage divider 6 and current transformer 7 are connected with demonstration record processing unit;
In the utility model embodiment, because spark plug 5 need to be arranged on the cylinder cap of natural gas engine 1, hole in the middle of cylinder cap can only hold Hi-pot test line 8, so need to pull down spark coil 4 from natural gas engine 1, the action of spark coil 4 on natural gas engine 1 is constant, just change the position of installing, thereby be convenient to measure voltage waveform, the current waveform of igniting.Spark coil 4, voltage divider 6 and current transformer 7 are all fixed on natural gas engine 1.
Further, after spark coil 4 splits out, spark coil 4 primary air are connected with the output terminal of electronic control unit 3.Spark plug 5 is connected with the secondary winding of spark coil 4 by Hi-pot test line 8, mainly by Hi-pot test line 8, to bear the high pressure of spark coil 4 secondary winding outputs, and can voltage divider 6 and current transformer 7 be set by Hi-pot test line 8, to the voltage waveform under engine operating state, current waveform are sampled and are obtained.Usually, Hi-pot test line 8 needs to carry out insulation protection after being connected with voltage divider 6, current transformer 7 to be processed, and guarantees the safety in whole test process.
C, the voltage waveform obtaining by demonstration record processing unit demonstration output voltage voltage divider 6, the current waveform that current transformer 7 obtains, union obtains the ignition energy of natural gas engine 1 under current test operating mode; Voltage waveform, current waveform and the ignition energy under current test operating mode carries out association store by natural gas engine 1 to show record processing unit;
In the utility model embodiment, show that record processing unit comprises oscillograph 9 and the upper-position unit 10 being connected with described oscillograph 9; In addition, recognizer 9 can also carry out some simple integral operationes.The current waveform computing that the voltage waveform that oscillograph 9 obtains according to voltage divider 6, current transformer 7 obtain obtains ignition energy; Oscillograph 9 transfers to voltage waveform, current waveform and the ignition energy of above-mentioned demonstration output in upper-position unit 10, with voltage waveform, current waveform and ignition energy under the interior test of the correspondence to natural gas engine 1 of upper-position unit 10 operating mode, carries out association store.
In the specific implementation, 4 level output waveforms of correct spark coil should comprise charging stage, breakdown phase, electric arc maintenance stage, voltage concussion is made zero the stage; Light a fire unsuccessful, do not form the malfunction situations such as spark, plug bridging, open coil and all can produce different waveforms.Whether the igniting that can judge this circulation by the waveform that recognizer 9 is shown is successful, and whether the work of ignition system is normal.
The performance index of ignition system generally comprise secondary output voltage, secondary voltage rise time, secondary voltage climbing, secondary discharge electric current, secondary current endurance and ignition energy.Wherein secondary output voltage, secondary voltage rise time, secondary discharge electric current, secondary current endurance can directly read by oscillograph 9; Ignition energy be the product of secondary output voltage and secondary discharge electric current at secondary current the integration in the endurance; Secondary voltage climbing is in secondary voltage rise time, the derivative of secondary voltage to the time.In the utility model embodiment, the voltage of above-mentioned explanation, electric current are voltage waveform value and the current waveform values of obtaining by voltage divider 6, current transformer 7 samplings.The integral operation that obtains ignition energy can complete in the interior computing of oscillograph 9.
The test operating mode of d, adjustment natural gas engine 1, and repeat above-mentioned testing procedure c, until complete the test request to natural gas engine 1.
In the specific implementation, when the running state of natural gas engine 1 is tested, need to carry out the test under multiple operating conditions, the adjusting that therefore need to realize by controlling the aperture of rotating speed and gas pedal the operating mode of natural gas engine 1 converts.After the operating conditions of natural gas engine 1 regulates, need repeating step c, to obtain the every test data under the operating conditions of natural gas engine 1 after adjustment, until complete the test request to natural gas engine 1, wherein, described test request refers to the test of testing time or some running state points, specifically can determine according to actual test case.
The utility model splits out the spark coil of natural gas engine 14, and be connected with spark plug 5 by Hi-pot test line 8, under natural gas engine 1 running state, by voltage divider 6, current transformer 7 obtains respectively voltage waveform and current waveform, by oscillograph 9, show the waveform that output is corresponding, by upper-position unit 10, carry out association store, thereby can access high temperature, the ignition voltage constantly changing in the firing chamber of high pressure, electric current, performance parameter that not only can test point fire coil 4, can also test the breakdown voltage of spark plug 5, the actual working state of reflection ignition system, can evaluation point fire coil 4, whether spark plug 5 meet engine performance requirement, the trend can analysis site fire performance parameter changing with engine operating condition, by the waveform of ignition voltage, electric current, can assist to analyze engine cylinder combustion process, easy to operate, improve the validity of test, safe and reliable.
Claims (4)
1. the igniting test system based under engine operating state, comprises the natural gas engine (1) being installed on stand and tears open certainly in the spark coil (4) of described natural gas engine (1), it is characterized in that: the spark plug (5) of described natural gas engine (1) is connected with the secondary winding of spark coil (4) by testing high voltage line (8), and the primary air of spark coil (4) is connected with the output terminal of the electronic control unit (3) of described natural gas engine (1), on testing high voltage line (8), be provided with for the voltage divider (6) of acquisition point fire coil (4) secondary coil voltage and for the current transformer (7) of acquisition point fire coil (4) secondary current, described voltage divider (6) and current transformer (7) are all connected with demonstration record processing unit, under the operating conditions of natural gas engine (1), show the voltage waveform that record processing unit obtains voltage divider (6), the current waveform display output that current transformer (7) obtains, union obtains ignition energy, and by the voltage waveform under above-mentioned corresponding operating conditions, current waveform and ignition energy carry out association store.
2. the igniting test system based under engine operating state according to claim 1, is characterized in that: described demonstration record processing unit comprises oscillograph (9) and the upper-position unit (10) being connected with described oscillograph (9); Oscillograph (9) is connected with voltage divider (6), current transformer (7), with voltage waveform, the current waveform that shows that output is corresponding; The current waveform computing that the voltage waveform that oscillograph (9) obtains according to voltage divider (6), current transformer (7) obtain obtains ignition energy; Oscillograph (9) transfers to voltage waveform, current waveform and the ignition energy of above-mentioned demonstration output in upper-position unit (10), voltage waveform, current waveform and ignition energy under the corresponding operating conditions of natural gas engine (1) are carried out to association store in upper-position unit (10).
3. the igniting test system based under engine operating state according to claim 1, is characterized in that: the power end of described electronic control unit (3) is connected with power supply (2).
4. the igniting test system based under engine operating state according to claim 1, is characterized in that: natural gas engine (1) comprises electronic control unit (3), spark coil (4) and spark plug (5); In natural gas engine (1), split out spark coil (4), the output terminal of electronic control unit (3) is connected with the primary air of spark coil (4); Spark coil (4), voltage divider (6) and current transformer (7) are all fixed on natural gas engine (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216111.1U CN203809192U (en) | 2014-04-30 | 2014-04-30 | Ignition testing system based on operation state of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216111.1U CN203809192U (en) | 2014-04-30 | 2014-04-30 | Ignition testing system based on operation state of engine |
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| Publication Number | Publication Date |
|---|---|
| CN203809192U true CN203809192U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420216111.1U Expired - Fee Related CN203809192U (en) | 2014-04-30 | 2014-04-30 | Ignition testing system based on operation state of engine |
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| CN (1) | CN203809192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939255A (en) * | 2014-04-30 | 2014-07-23 | 中国第一汽车股份有限公司 | Ignition test system and test method based on operation state of engine |
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2014
- 2014-04-30 CN CN201420216111.1U patent/CN203809192U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939255A (en) * | 2014-04-30 | 2014-07-23 | 中国第一汽车股份有限公司 | Ignition test system and test method based on operation state of engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20200430 |