CN201292907Y

CN201292907Y - Ignition coil test device

Info

Publication number: CN201292907Y
Application number: CNU2008202132058U
Authority: CN
Inventors: 王永祥; 陈胜波
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2008-10-31
Filing date: 2008-10-31
Publication date: 2009-08-19
Anticipated expiration: 2018-10-31

Abstract

The utility model provides a test device of an ignition coil, comprising a pulse generating unit generating pulse signals and a test unit, wherein the pulse generating unit comprises a parameter setting module, a processing module and an output module. The parameter setting module presets parameter values and sends the digital signals of the preset parameter values to the processing module; the processing module receives the digital signals, obtains corresponding frequency values based on the digital signals, generates corresponding pulse signals based on the obtained frequency values, modulates the pulse width of the pulse signals of the frequency values, and outputs the pulse signals to the ignition coil through the output module to control the ignition coil to ignite, and the test unit detects the ignition status of the ignition coil with the pulse signals of the frequency values to test the ignition performance at different frequencies so as to obtain the best ignition frequency and ignition pulse width.

Description

The spark coil testing apparatus

[technical field]

The utility model relates to the field tests of automobile engine fuel oil system electronic ignition performance, relates in particular to a kind of spark coil testing apparatus.

[background technique]

Motor is very important parts in the automobile, it also is the power source of automobile, its quality is directly connected to the performance index of automobile All aspects of, and spark coil is the core component of automotive engine ignition system, and its performance quality directly has influence on the operating mode of ignition system and even automobile; In order to implement best control strategy, need find out the optimum igniting frequency and the pulsewidth of spark coil, need to adopt advanced test method and system that spark coil is tested, and raising testing precision and testing efficiency are the thing of the most important thing just.

At present, existing spark coil testing apparatus only can be carried out the definite value test, promptly under a certain fixing frequency, come the regulating impulse width by the CPU element in the puocessing module, thereby produce the pulse signal of different pulse widths under the same frequency, then by test cell Check point condition of a fire condition, final definite optimum pulse width, existing testing apparatus testing precision is low, and frequency accuracy is poor, only is 1Hz, the pulse width precision is low, only be 1%, so just can't find out optimum igniting frequency and pulsewidth exactly, thereby can not satisfy the improvement demand of structural behaviour of spark coil and ECU enforcement fully the optimum controling strategy of ignition system.

[model utility content]

The technical problem that the utility model solves is for providing a kind of spark coil testing apparatus that can accurately measure coil optimum frequency and pulsewidth.

In order to address the above problem, the technical solution adopted in the utility model is:

A kind of spark coil testing apparatus, comprise the pulsing unit that produces pulse signal, test cell, wherein, described pulsing unit comprises that parameter is provided with module, puocessing module and output module, described parameter is provided with the module preset parameter value, and the digital signal of default parameter value sent to puocessing module, described puocessing module receiving digital signals, obtain the corresponding frequencies value according to above-mentioned digital signal, and produce corresponding pulse signal according to the frequency values that obtains, described puocessing module is regulated the pulse width of the pulse signal of said frequencies value, by output module pulse signal is exported to spark coil, the igniting of control ignition coil, the igniting situation of described test cell Check point fire coil under the pulse signal of said frequencies value.

After adopting such structure, parameter is provided with module and produces different parameters, and different parameters is corresponding to different pulse frequencies, and send parameter signal to puocessing module, after processing unit receives the processing parameter signal, produce the pulse signal under the different frequency, puocessing module is regulated the output that realizes the pulse signal of different pulse widths under the same frequency automatically by internal processes simultaneously, so just be implemented in the adjustment of carrying out pulsewidth under the different frequencies respectively, the pulse signal of Chan Shenging passes to spark coil the most at last, test cell is tested the igniting situation simultaneously, thereby can test out best spark rate and igniting pulsewidth better.

[description of drawings]

Fig. 1 is the integrally-built FB(flow block) of the utility model spark coil testing apparatus preferred embodiment;

Fig. 2 is the structural representation of pulsing unit among Fig. 1;

Fig. 3 is the structured flowchart of another mode of execution of the utility model;

Fig. 4 is the schematic representation of a kind of mode of execution of the utility model test cell;

[embodiment]

In order to make the purpose of this utility model, technological scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

The utility model provides a kind of spark coil testing apparatus, comprise pulsing unit 10, test cell 30, this pulsing unit 10 produces pulse signal, described pulse signal can be square-wave signal, described square-wave signal contains high level and low level, described pulse width is called for short pulsewidth, be meant that described high level occupies the percentage of whole pulse interval, when described pulse signal shows as high level, described spark coil 20 constant ignitions, the time that described high level continues is the time of described spark coil 20 constant ignitions, when described pulse signal shows as low level, then spark coil 20 extinguishes, thereby realize with pulse signal control ignition coil 20 igniting and stalling, the igniting situation of the then responsible Check point fire coil 20 of test cell 30, specifically, igniting information concrete when lighting a fire is gathered and write down to described test cell 30, if the temporal information that the information of voltage at these igniting information spinner spark coil 20 two ends and igniting continue etc., at the igniting information that collects, determine optimum igniting frequency and pulsewidth with reference to the method in the NBS QC/T 16-92 firing coil test.

For optimum igniting frequency and the igniting pulsewidth of determining spark coil 20 required pulse signals, the spark coil testing apparatus that the utility model relates to comprises pulsing unit 10, test cell 30, described pulsing unit 10 comprises that parameter is provided with module 11, puocessing module 12 and output module 13, described parameter is provided with module 10 and is preset with parameter value, and the digital signal of default parameter value sent to puocessing module 12, described puocessing module 12 receives parameter the digital signal that module 11 sends over is set, and from described digital signal, extract the frequency of corresponding pulses signal, and according to this frequency production burst signal, described default parameter value is one by one corresponding to the frequency of pulse signal, described then puocessing module 12 will generate the pulse signal of different pulsewidths under this frequency, after the pulse test that finishes this frequency, then adopt the test of carrying out next frequency in the same way, the adjusting of pulse width specifically can be regulated in the different in width scope, as one for example, pulsewidth can automatically adjust between 1%～100%, the automatic adjusting of concrete pulse width is automatically adjusted by the CPU in the puocessing module 12, in order to reach so precision, need to adopt high-speed CPU, such as, in pulse frequency is under the situation of 1Hz, pulse interval this moment is 1s, puocessing module 12 automatic regulating impulse width promptly are to realize in programming, it makes the time of high level increase 0.01s, reduce low level time 0.01s simultaneously, pulse width has just increased by 1% like this, has just carried out 100 igniting tests like this under same frequency.Described parameter is provided with module 11 when producing concrete parameter, need to guarantee that the frequency accuracy of described parameter correspondence is below the 0.1Hz, concrete described parameter is provided with module and adopts default mode, and be provided with corresponding converting unit in the puocessing module, described converting unit is converted to the frequency signal that adapts to spark coil with the parameter preset that parameter is provided with in the module, concrete conversion regime can adopt in converting unit default transfer function to realize, concrete, can be stored in described each concrete parameter in the storage unit in certain sequence earlier, read and convert to the correspondent frequency signal then in order, a described definite sequence can have programming personnel oneself to grasp, as long as can satisfy the frequency of okperation that the pulse signal frequency that obtains after the conversion is positioned at spark coil, as one for example, default 100 parameters, be respectively by 1 to 100 natural number, if the frequency that need this moment is 0.1Hz, 0.2Hz......10Hz, transfer function only was required to be Y=X/10 and got final product this moment, because different spark coils has different spark rate using scope, so when specifically preset parameter value being set, need consider the range problem of spark rate, through whole enforcement, could make that like this precision of final optimum igniting frequency can be enough high, thereby guarantee the enforcement of whole ECU the optimum controling strategy of ignition system.

The frequency that parameter when testing in order to make is provided with the parameter value frequency value corresponding pulse signal of module 11 can be expressed out, described pulsing unit 10 also comprises the display modular 14 that is electrically connected with puocessing module 12, thereby can allow the tester can understand the progress of test at any time.

As another mode of execution of the present utility model, because the output of the various combined port of different test method and test request is different, between pulsing unit 10 and spark coil 20, be provided with interconnecting device 40, various combined port can comprise the multi-load testing property, single load current and voltage tester, non-loaded endurance quality test etc., described interconnecting device 40 is also tested at different spark coil 20, described spark coil 20 can be the single cylinder spark coil, twin-tub spark coil and four cylinder spark coils etc.

For spark coil 20 is well detected, described test cell 30 comprises first circuit 31 in parallel with described spark coil 20, described first circuit 31 comprises high-pressure attenuator part D1 and the oscillograph M1 that connects with described high-pressure attenuator part, because the voltage that spark coil 20 produces is high pressure, in order not cause oscillographic damage, so adopt high-pressure attenuator part D1 to carry out the decay of voltage, thereby guarantee oscillograph proper functioning under required operating voltage, this oscillograph M1 can realize the collection to igniting information, and produce corresponding image, the image of observation oscilloscope or parameter, the keeping records test result, concrete preserving type can directly preserve curve by oscillograph or the concrete electronic equipment that links to each other is preserved, and this is those skilled in the art's conventional means, does not just do at this and gives unnecessary details.

In order to carry out load-carrying test, described test cell 30 also comprises the second circuit 32 in parallel with spark coil 20, described second circuit 32 comprises switch and the load of connecting with switch, described load can be single load resistance 321, the also combination load 322 that can compose in parallel for electric capacity and inductance, based on spark coil 20 generations is high pressure, can puncture for common switch, so can adopt above-mentioned interconnecting device 40 herein transfers, simultaneously because high pressure can produce strong jamming, and the tester there is potential safety hazard, so the place has increased high voltage protection device (not shown) at high voltage terminal external interface terminal, described high voltage protection device is the specific insulating material of energy isolated high-voltage, and this is related domain common technology, does not do at this and gives unnecessary details.

In order to carry out the endurance test of spark coil 20 simultaneously, described test cell 30 also comprises the counting module (not shown), concrete, described counting module can be added up the igniting number of times of spark coil by number of ways, such as, the periodicity of pulse signal, counting module is electrically connected with oscillograph in the utility model, thereby add up the igniting number of times of spark coil by the periodicity of the igniting information in the statistics oscillograph, simultaneously when the pressure drop of the voltage at the two ends that described spark coil 20 produces reach the spark coil voltage rating 5% the time, assert that then spark coil 20 lost efficacy, the igniting number of times that add up this moment is the durability times of spark coil 20.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the utility model is determined by claims of being submitted to.

Claims

1, a kind of spark coil testing apparatus, comprise the pulsing unit that produces pulse signal, test cell, it is characterized in that, described pulsing unit comprises that parameter is provided with module, puocessing module and output module, described parameter is provided with the module preset parameter value, and the digital signal of default parameter value sent to puocessing module, described puocessing module receiving digital signals, obtain the corresponding frequencies value according to above-mentioned digital signal, and produce corresponding pulse signal according to the frequency values that obtains, described puocessing module is regulated the pulse width of the pulse signal of said frequencies value, by output module pulse signal is exported to spark coil, the igniting of control ignition coil, the igniting situation of described test cell Check point fire coil under the pulse signal of said frequencies value.

2, spark coil testing apparatus as claimed in claim 1 is characterized in that, described puocessing module also comprises the converting unit that the described digital signal that has preset parameter value is converted to frequency values.

3, spark coil testing apparatus as claimed in claim 1 is characterized in that, described pulsing unit also comprises the display modular that is electrically connected with puocessing module, and described display modular shows the frequency of pulse signal.

4, spark coil testing apparatus as claimed in claim 1 is characterized in that, described igniting situation comprises the time of spark coil both end voltage and ignition coil.

5, spark coil testing apparatus as claimed in claim 1 is characterized in that, described spark coil testing apparatus also comprises interconnecting device, and described interconnecting device is connected between described pulsing unit and the spark coil.

6, spark coil testing apparatus as claimed in claim 1 is characterized in that, described test cell comprises first circuit in parallel with described spark coil, and described first circuit comprises high-pressure attenuator part and the oscillograph of connecting with the high-pressure attenuator part.

7, spark coil testing apparatus as claimed in claim 6 is characterized in that, described test cell also comprises the second circuit in parallel with spark coil, and described second circuit comprises switch and the load of connecting with switch.

8, spark coil testing apparatus as claimed in claim 7 is characterized in that, described load is load resistance or the combination load that composed in parallel by electric capacity and inductance.

9, spark coil testing apparatus as claimed in claim 6 is characterized in that, described test cell also comprises the counting module that the igniting number of times is added up, and described counting module is electrically connected with oscillograph.

10, spark coil testing apparatus as claimed in claim 1 is characterized in that, described spark coil testing apparatus also comprises the high voltage protection device that links to each other with spark coil high voltage terminal external interface terminal.