CN203925763U - The update the system of a kind of injector opening time, fuel injection pulsewidth - Google Patents
The update the system of a kind of injector opening time, fuel injection pulsewidth Download PDFInfo
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- CN203925763U CN203925763U CN201420316236.1U CN201420316236U CN203925763U CN 203925763 U CN203925763 U CN 203925763U CN 201420316236 U CN201420316236 U CN 201420316236U CN 203925763 U CN203925763 U CN 203925763U
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- Prior art keywords
- fuel injection
- oil sprayer
- oil
- fuel
- injection pulsewidth
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Abstract
The utility model relates to the update the system of a kind of injector opening time, fuel injection pulsewidth.Technical problem to be solved in the utility model, how by adjusting injection advance angle, fuel injection pulsewidth, provides a kind of simple, fast oil-fuel injector needle-valve system for measuring responsive time.Update the system, comprising: fuel oil supply system, oil sprayer, injector controller; Oil sprayer current measuring device, data storage device, engine calibration parameter storage unit, amending unit.The utility model, when engine start, can complete the correction of injector opening time, fuel injection pulsewidth fast.
Description
Technical field:
The utility model relates to a kind of electromagnetic fuel injector, relates in particular to the update the system of a kind of injector opening time, fuel injection pulsewidth.
Background technique:
In engine fuel injection system, oil sprayer is one of critical component, and accurate injection timing and fuel injection quantity are controlled power character, Economy and the exhaust emissions that directly affects motor.
Conventionally, the structure diagram of electromagnetic fuel injector as shown in Figure 1, is mainly comprised of several parts such as electromagnetic coil 1, nozzle holder 2, armature 3, needle-valve 4, spring 5, spray orifice 6, block 7, wiring terminal 8, yokes 9.Needle-valve and the armature of oil sprayer head are connected as a single entity, and the characteristics of motion and the armature of needle-valve are consistent.When oil sprayer electromagnetic coil receives after injector pulse voltage, produce electromagnetic force, armature is picked up, and needle-valve is opened, and fuel oil sprays by spray orifice.When fuel injection pulse stops, electromagnetic force diminishes gradually, and needle-valve, under spring-force driven dual, returns to valve seat, end of injection, and it is circuitry, magnetic circuit system, the coefficient result of mechanism system that electromagnetic fuel injector completes an oil spout.
Oil sprayer is not to open immediately after receiving control pulse width signal, but there is certain hysteresis, lag time is relevant with coil current size with the control voltage swing of controlling pulse width signal, and wherein the change curve of coil current is relevant with oil sprayer coil resistance and inductance again.Equally, the closing of oil sprayer neither be worked as to control and finished immediately after pulse width signal finishes, after oil sprayer is controlled voltage signal and finished, because the electromagnetic energy that electromagnetic coil stores can not be consumed immediately, oil sprayer close moment is also often later than controls voltage signal finish time.At real engine timing signal, the fuel injection pulsewidth of oil sprayer refers to fuel injector magnetic system two ends is applied to the endurance of controlling voltage, and the injection time of real engine is greater than control voltage width duration time.
After motor long time running, the resistance of oil sprayer coil and inductance and Returnning spring, system friction coefficient all can change, the response characteristic of fuel injector magnetic system also can change thereupon, finally affects the opening time (opening time generally can shorten) of oil sprayer and the length of actual fuel injection pulsewidth (fuel injection pulsewidth length can be elongated).
Current most motor producer is only when motor dispatches from the factory, directly electronic control unit is sent to control signal map and brush the control unit into ECU, then by oil sprayer advance angle (crank angle when electronic control unit sends control signal between engine crankshaft position and engine crankshaft top dead center) and the demarcation of controlling voltage time are controlled to oil sprayer oil spout, but this does not consider problem of aging and the oil sprayer running time of oil sprayer.After oil sprayer is aging, although controlling voltage width duration time does not change, but actual opening time and the injection duration of oil sprayer change, if actual opening time of oil sprayer and fuel injection pulsewidth are not revised, certainly will be affected power character, Economy and the exhaust emissions of motor.
Summary of the invention:
How technical problem to be solved in the utility model is by adjusting injection advance angle, fuel injection pulsewidth, making the aging rear actual fuel injection of oil sprayer is in the situation that not destroying fuel injector structure, and the update the system of a kind of simple, fast a kind of injector opening time, fuel injection pulsewidth is provided.
The technical solution of the utility model is as follows:
A update the system for injector opening time, fuel injection pulsewidth, comprising: fuel oil supply system 11, oil sprayer 21, injector controller 14; Also comprise: oil sprayer current measuring device 15; Data storage device 13; Engine calibration parameter storage unit 17, is storing original oil sprayer oil spout duration t
0, oil sprayer hysteresis injection time Δ t
0, fuel injection pulse time starting point, fuel injection pulsewidth T
0information; Amending unit 18, is storing fuel supply advance angle θ
x, revised fuel injection pulsewidth value T
1.
Described oil sprayer current measuring device is Hall current sensor; Described injector controller is automobile-used ECU unit.
In above-mentioned measuring system, realize the process of revising as follows:
(1) preparatory work: adjust fuel oil supply system, make charge oil pressure be stabilized to required injection pressure; Set the suitable fuel injection parameter of oil sprayer controller, examination spray, the emptying fuel supply system air in pipeline and oil sprayer between oil sprayer of unifying, makes oil sprayer enter normal working preparation state; Open current measurement system, make one in oil sprayer power supply line to pass current measurement system; Offered target pulsewidth and oil spout frequency in oil sprayer controller;
(2) measuring phase:
Start oil sprayer, current measuring device is measured the size of current of process oil sprayer in oil sprayer working procedure and is sent data storage device to;
Data are extracted: obtain t
a, t
b, t
c, t
d, t
e, t
fconstantly, t
afor electric current starts to increase corresponding time point, t
bfor from t
acurrent continuity rises to time point corresponding to first maximum, t constantly
cfor from t
bcurrent continuity drops to time point corresponding to first minimum, t constantly
dfor from t
ccurrent continuity rises to time point corresponding to the second maximum, t constantly
efor from t
dcurrent continuity drops to time point corresponding to the second minimum, t constantly
ffor from t
ecurrent continuity rises to time point corresponding to the 3rd maximum constantly; Obtain the current actual fuel injection duration t of oil sprayer
1, t
1=t
f-t
b; By the current actual fuel injection duration t of oil sprayer
1with the oil spout duration t storing in fuel injection pulsewidth storage unit
0compare, and obtain difference t
x=t
1– t
0; Obtain oil sprayer hysteresis injection time Δ t
1=t
b-t
a.
(3) makeover process:
By the oil sprayer injection time Δ t that lags behind
1with original oil sprayer hysteresis injection time Δ t in engine calibration parameter storage unit
0compare, obtain: it is Δ t that oil sprayer reality shifts to an earlier date discharge time compared with original engine, Δ t=Δ t
0-Δ t
1;
The pulse voltage signal application time being applied on oil sprayer is postponed to Δ t, and be converted into fuel supply advance angle θ
x; Revised fuel injection pulsewidth value T
1=T
0– t
x;
Fuel supply advance angle θ
x, revised fuel injection pulsewidth value T
1deposit fuel injection pulsewidth amending unit in; When injector controller startup next time, by revised fuel supply advance angle θ
x, fuel injection pulsewidth T
1import automobile-used ECU unit.
Advantage of the present utility model and good effect are:
The injector opening time the utility model proposes, the update the system of fuel injection pulsewidth are by detecting the extreme value of fuel injector magnetic system current curve, determine the opening point of oil sprayer and close close point, no matter how how aging the or instantaneous voltage of oil sprayer, fuel pressure, fuel quality change, the injection delay and the fuel injection pulsewidth that detect change thereupon, all can react really the working state of motor.When engine start, model utility device can complete the correction of oil sprayer oil spout opening time and fuel injection pulsewidth fast.Revised oil spout opening time and fuel injection pulsewidth meet motor real-time working condition, can guarantee completely oil spout constantly, the accuracy of fuel injection quantity, for engine power performance, economical and exhaust emissions is ready.
Accompanying drawing explanation:
Fig. 1 is the basic physical arrangement sketch of oil sprayer; In figure, 1 represents electromagnetic coil, and 2 represent nozzle holder, and 3 represent armature, and 4 represent needle-valve, and 5 represent spring, and 6 represent spray orifice, and 7 represent block, and 8 represent wiring terminal, and 9 represent yoke.
Fig. 2 is that embodiment's the injector opening time recommended in the utility model mode of execution is, the update the system functional block diagram of fuel injection pulsewidth; In figure, 11 represent fuel oil supply system, 13 representative data storage devices, 14 represent injector controller, and 15 represent oil sprayer current measuring device, 16 representative data capture cards, 17 represent engine calibration parameter storage unit, and 18 represent amending unit, and 21 represent oil sprayer.
Fig. 3 is in the embodiment's that recommends in the utility model embodiment nozzle operation process, the pulse that nozzle controller applies nozzle control voltage signal and in this process current measurement system measure the size of current curve by oil sprayer electromagnetic coil.
Fig. 4 is oil sprayer fuel injection pulsewidth, the actual fuel injection duration of original demarcation, the schematic diagram of hysteresis injection time; In figure, abscissa represents the time.
Fig. 5 is the schematic diagram of aging rear oil sprayer fuel injection pulsewidth, actual fuel injection duration, hysteresis injection time; In figure, abscissa represents the time.
Fig. 6 is the schematic diagram of oil sprayer fuel injection pulsewidth after revising, actual fuel injection duration, hysteresis injection time; In figure, abscissa represents the time.
Embodiment:
By describing technology contents of the present utility model, structure characteristic in detail, being realized object and effect, in conjunction with mode of execution and coordinate accompanying drawing to describe in detail.Below in conjunction with accompanying drawing and specific implementation method, the utility model is described in further details.
A update the system for injector opening time, fuel injection pulsewidth, comprising: fuel oil supply system 11, oil sprayer 21, injector controller 14; Also comprise: oil sprayer current measuring device 15; Data storage device 13; Engine calibration parameter storage unit 17, is storing original oil sprayer oil spout duration t
0, oil sprayer hysteresis injection time Δ t
0, fuel injection pulse time starting point, fuel injection pulsewidth T
0information; Amending unit 18, is storing fuel supply advance angle θ
x, revised fuel injection pulsewidth value T
1.
Described oil sprayer current measuring device is Hall current sensor; Described injector controller is automobile-used ECU unit.
Makeover process in above-mentioned measuring system is as follows:
(1) preparatory work: adjust fuel oil supply system, make charge oil pressure be stabilized to required injection pressure; Set the suitable fuel injection parameter of oil sprayer controller, examination spray, the emptying fuel supply system air in pipeline and oil sprayer between oil sprayer of unifying, makes oil sprayer enter normal working preparation state; Open current measurement system, make one in oil sprayer power supply line to pass current measurement system; Offered target pulsewidth and oil spout frequency in oil sprayer controller;
(2) measuring phase:
Start oil sprayer, current measuring device is measured the size of current of process oil sprayer in oil sprayer working procedure and is sent data storage device to;
Data are extracted: obtain t
a, t
b, t
c, t
d, t
e, t
fconstantly, t
afor electric current starts to increase corresponding time point, t
bfor from t
acurrent continuity rises to time point corresponding to first maximum, t constantly
cfor from t
bcurrent continuity drops to time point corresponding to first minimum, t constantly
dfor from t
ccurrent continuity rises to time point corresponding to the second maximum, t constantly
efor from t
dcurrent continuity drops to time point corresponding to the second minimum, t constantly
ffor from t
ecurrent continuity rises to time point corresponding to the 3rd maximum constantly; Obtain the current actual fuel injection duration t of oil sprayer
1, t
1=t
f-t
b; By the current actual fuel injection duration t of oil sprayer
1with the oil spout duration t storing in fuel injection pulsewidth storage unit
0compare, and obtain difference t
x=t
1– t
0; Obtain oil sprayer hysteresis injection time Δ t
1=t
b-t
a.
(3) makeover process:
By the oil sprayer injection time Δ t that lags behind
1with original oil sprayer hysteresis injection time Δ t in engine calibration parameter storage unit
0compare, obtain: it is Δ t that oil sprayer reality shifts to an earlier date discharge time compared with original engine, Δ t=Δ t
0-Δ t
1;
The pulse voltage signal application time being applied on oil sprayer is postponed to Δ t, and be converted into fuel supply advance angle θ
x; Revised fuel injection pulsewidth value T
1=T
0– t
x;
Fuel supply advance angle θ
x, revised fuel injection pulsewidth value T
1deposit fuel injection pulsewidth amending unit in; When injector controller startup next time, by revised fuel supply advance angle θ
x, fuel injection pulsewidth T
1import automobile-used ECU unit.
From Fig. 4-Fig. 6, contrast, after oil sprayer is aging, if fuel injection pulse starting point and duration are constant, will cause oil sprayer than the Zao oil spout of the oil sprayer of original demarcation, late closing, cause the waste of fuel oil; Pass through the utility model, adjust the starting point of pulse, make revised oil sprayer oil spout constantly constantly the same with the oil sprayer oil spout of original demarcation, adjust fuel injection pulsewidth simultaneously, make revised oil sprayer oil spout duration the same with the oil sprayer oil spout duration of original demarcation, reach the object of model utility.
The utility model is not limited to mode of execution discussed above.Above the description of embodiment is intended in order to describe and illustrate the technological scheme that the utility model relates to.Apparent conversion based on the utility model enlightenment or substitute and also should be considered to fall into protection domain of the present utility model.Above embodiment is used for disclosing best implementation methods of the present utility model, so that those of ordinary skill in the art can apply numerous embodiments of the present utility model and multiple alternative reaches the purpose of this utility model.
Claims (3)
1. a update the system for injector opening time, fuel injection pulsewidth, comprising: fuel oil supply system (11), oil sprayer (21), injector controller (14); It is characterized in that, also comprise: oil sprayer current measuring device (15); Data storage device (13); Engine calibration parameter storage unit (17), is storing original oil sprayer oil spout duration t
0, oil sprayer hysteresis injection time Δ t
0, fuel injection pulse time starting point, fuel injection pulsewidth T
0information; Amending unit (18), is storing fuel supply advance angle θ
x, revised fuel injection pulsewidth value T
1.
2. the update the system of a kind of injector opening time, fuel injection pulsewidth according to claim 1, is characterized in that, described oil sprayer current measuring device is Hall current sensor.
3. the update the system of a kind of injector opening time, fuel injection pulsewidth according to claim 1, is characterized in that, described injector controller is automobile-used ECU unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316236.1U CN203925763U (en) | 2014-06-13 | 2014-06-13 | The update the system of a kind of injector opening time, fuel injection pulsewidth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316236.1U CN203925763U (en) | 2014-06-13 | 2014-06-13 | The update the system of a kind of injector opening time, fuel injection pulsewidth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203925763U true CN203925763U (en) | 2014-11-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420316236.1U Expired - Fee Related CN203925763U (en) | 2014-06-13 | 2014-06-13 | The update the system of a kind of injector opening time, fuel injection pulsewidth |
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|---|---|
| CN (1) | CN203925763U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005869A (en) * | 2014-06-13 | 2014-08-27 | 天津大学 | Oil sprayer opening time and oil spraying pulse width correcting method and system |
| CN111208745A (en) * | 2020-03-16 | 2020-05-29 | 吉林省运捷轨道科技开发有限公司 | Control method for automatically calculating oil injection quantity of rail lubrication system |
-
2014
- 2014-06-13 CN CN201420316236.1U patent/CN203925763U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005869A (en) * | 2014-06-13 | 2014-08-27 | 天津大学 | Oil sprayer opening time and oil spraying pulse width correcting method and system |
| CN104005869B (en) * | 2014-06-13 | 2017-01-25 | 天津大学 | Oil sprayer opening time and oil spraying pulse width correcting method and system |
| CN111208745A (en) * | 2020-03-16 | 2020-05-29 | 吉林省运捷轨道科技开发有限公司 | Control method for automatically calculating oil injection quantity of rail lubrication system |
| CN111208745B (en) * | 2020-03-16 | 2023-04-07 | 吉林省运捷轨道科技开发有限公司 | Control method for automatically calculating oil injection quantity of rail lubrication system |
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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: 20141105 Termination date: 20190613 |