CN103352763A - MAP curve correction method and device for fuel injector and engine fuel supply system - Google Patents
MAP curve correction method and device for fuel injector and engine fuel supply system Download PDFInfo
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- CN103352763A CN103352763A CN2013101961181A CN201310196118A CN103352763A CN 103352763 A CN103352763 A CN 103352763A CN 2013101961181 A CN2013101961181 A CN 2013101961181A CN 201310196118 A CN201310196118 A CN 201310196118A CN 103352763 A CN103352763 A CN 103352763A
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- 239000000446 fuel Substances 0.000 title claims abstract description 54
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- 238000002347 injection Methods 0.000 claims abstract description 61
- 239000007924 injection Substances 0.000 claims abstract description 61
- 238000012544 monitoring process Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 11
- 239000002341 toxic gas Substances 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 163
- 238000012360 testing method Methods 0.000 description 11
- 239000000295 fuel oil Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
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- 230000003247 decreasing effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides an MAP curve correction method and device for a fuel injector and an engine fuel supply system. The method comprises the following steps: when the rail pressure in a common rail pipe of a fuel injection device is the preset rail pressure, a pulse signal is utilized to drive a solenoid valve of the fuel injector, and the rail pressure in the common rail pipe is real-timely monitored; according to the variation state of the rail pressure in the common rail pipe, the zero-fuel power-up time of the solenoid valve and the fuel injection angular advance of the fuel injector are acquired; according to the zero-fuel power-up time and the fuel injection angular advance of the fuel injector, the MAP curve of the fuel injector under the preset rail pressure is updated. In the embodiment of the invention, the on/off state of the solenoid valve is determined by the variation state of the rail pressure after an oil pump stops oil supply, so that the corrected power-up time of the solenoid valve and the corrected fuel injection angular advance of the fuel injector are efficiently and conveniently acquired, accurate control of the fuel injection amount through the fuel injector is ensured, the output power and the fuel firing efficiency of a diesel engine are improved, the fuel consumption of the diesel engine is lowered, and emission of toxic gases in the running process of the diesel engine is effectively reduced.
Description
Technical field
The present invention relates to the oil sprayer technical field, especially, relate to a kind of method for correcting, device and engine fuel supply system of oil sprayer MAP curve.
Background technique
Now, the internal-combustion engines such as diesel engine adopt the high-pressure common rail device to come fuel feeding usually, the high-pressure common rail device is in the closed-loop system that oil pump, pressure transducer and electronic control unit form, generation and the injection process of the rail pressure in the common rail pipe is completely separate from each other, so that the rotating speed of the size of rail pressure and motor is irrelevant, thereby effectively overcome the problem that Fuel Injection Mechanism of Diesel Engine pressure changes with engine speed, improve the utilization ratio of fuel oil, reduced simultaneously the toxic gas volume that the burn incompletely owing to fuel oil discharges.
Wherein, fuel oil is pressed into the common rail pipe to supply with some the oil sprayers that common rail pipe ins succession from oil pump and sprays.Comprise two final controlling element in the diesel engine, a final controlling element is used for producing at common rail pipe the flow measurement unit of certain rail pressure, the flow measurement unit is arranged in the oil pump, another final controlling element is used for carrying out the oil sprayer of accurate oil spout, and oil pump and oil sprayer are controlled according to the parameter in the MAP table of oil sprayer by the ECU ECU (Electrical Control Unit).Solenoid valve in the oil sprayer opens to realize oil spout under the driving of the pulse signal that the ECU ECU (Electrical Control Unit) is sent, because solenoid valve is after receiving pulse signal, could open and oil spout after having certain lag time, solenoid valve in this lag time is because do not open can not oil spout, so this lag time is zero oil mass power-up time, so, grasp exactly the zero oil mass power-up time of solenoid valve and realize the accurately fuel injection quantity of control oil sprayer.
Increase along with solenoid valve opening times in the oil sprayer, under the impact and corrosive action of fuel oil, the nozzle of oil sprayer and spill port enlarge, simultaneously the coil on the solenoid valve is because inductance effect and use for a long time and wear out, cause the zero oil mass injection time of solenoid valve to change, and the ECU ECU (Electrical Control Unit) remains initial MAP according to oil sprayer and shows to control solenoid valve in the oil sprayer, and oil sprayer can't accurately be controlled fuel injection quantity, causes the oil consumption increase of diesel engine, output power to reduce.
Summary of the invention
For addressing the above problem, the invention provides a kind of method for correcting, device and engine fuel supply system of oil sprayer MAP curve, being used for solving the prior art oil sprayer can not accurately control fuel injection quantity, causes the oil consumption increase of diesel engine, the problem that output power reduces.
For this reason, the invention provides a kind of method for correcting of oil sprayer MAP curve, comprising:
When the rail pressure in the common rail pipe of fuel injection apparatus is default rail pressure, utilize the solenoid valve of pulse signal driving oil sprayer, and the rail pressure in the Real-Time Monitoring common rail pipe;
According to the state of changing of rail pressure in the common rail pipe, obtain the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer;
Upgrade the MAP curve of oil sprayer under this default rail pressure according to the injection advance angle of described zero oil mass power-up time and oil sprayer.
Wherein, described state of changing according to rail pressure in the common rail pipe, obtain the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer and comprise:
During the sudden change of the rail pressure generation step of described common rail pipe, pulse signal drives described solenoid valve and opens, and obtains zero oil mass power-up time according to the width of this pulse signal.
Wherein, described state of changing according to rail pressure in the common rail pipe, obtain the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer and also comprise:
According to the zero oil mass power-up time of described solenoid valve, obtain the injection advance angle of described oil sprayer.
Wherein, the described solenoid valve that utilizes pulse signal to drive oil sprayer, and also comprise before the rail pressure step in the Real-Time Monitoring common rail pipe:
Width is set is respectively Et
1, Et
2..., Et
k..., Et
nN pulse signal;
Wherein, the spacing accuracy of pulse signal is constant △ E, the spacing accuracy △ E=Et of pulse signal
2-Et
1=... Et
k-Et
K-1=... Et
n-Et
N-1, k, n are natural number.
Wherein, described method also comprises: the MAP table that upgrades described oil sprayer according to the MAP curve of oil sprayer under each default rail pressure.
The present invention also provides a kind of correcting device of oil sprayer MAP curve, comprising:
Monitoring modular when being used for rail pressure at the common rail pipe of internal-combustion engine for default rail pressure, utilizes pulse signal to drive the solenoid valve of oil sprayer and the rail pressure in the Real-Time Monitoring common rail pipe;
Acquisition module is used for the state of changing according to the common rail pipe rail pressure, obtains the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer;
The first update module is used for upgrading according to the injection advance angle of described zero oil mass power-up time and oil sprayer the MAP curve of oil sprayer under this default rail pressure.
Wherein, described correcting device also comprises: module is set, is used for that width is set and is respectively Et
1, Et
2..., Et
k..., Et
nPulse signal, then utilize said n pulse signal to drive solenoid valve;
Wherein, the spacing accuracy of pulse signal is constant △ E, the spacing accuracy △ E=Et of pulse signal
2-Et
1=... Et
k-Et
K-1=... Et
n-Et
N-1, k, n are natural number.
Wherein, described correcting device also comprises:
The second update module is used for the MAP table according to the MAP curve renewal oil sprayer of oil sprayer under each default rail pressure.
Wherein, described acquisition module comprises: advance angle is obtained submodule;
Described advance angle is obtained submodule for the power-up time according to described solenoid valve, obtains the injection advance angle of described oil sprayer.
The present invention also provides a kind of engine fuel supply system, comprising the correcting device of above-mentioned any one oil sprayer MAP curve.
The present invention has following beneficial effect:
In method for correcting, device and the engine fuel supply system embodiment of oil sprayer MAP curve provided by the invention, determine the on off state of solenoid valve by the state of changing of rail pressure behind the oil pump fuel cut-off, thereby efficiently, obtain easily the revised power-up time of solenoid valve and the revised injection advance angle of oil sprayer, guarantee that oil sprayer can accurately control fuel injection quantity, improve output power and the fuel efficiency of diesel engine, reduce the oil consumption of diesel engine, also can effectively reduce the discharging of toxic gas in the diesel engine operation process simultaneously.
Description of drawings
Fig. 1 is method for correcting first embodiment's of oil sprayer MAP curve of the present invention flow chart;
Fig. 2 is method for correcting second embodiment's of oil sprayer MAP curve of the present invention flow chart;
Fig. 3 is the rail pressure change curve among method for correcting second embodiment of oil sprayer MAP curve of the present invention;
Fig. 4 is the logical flow chart that calculates injection advance angle among method for correcting second embodiment of oil sprayer MAP curve of the present invention;
Fig. 5 is the correcting device embodiment's of oil sprayer MAP curve of the present invention structural representation;
Fig. 6 is correcting device second embodiment's of oil sprayer MAP curve of the present invention structural representation.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
In embodiments of the present invention, behind the disconnected pump of oil pump, if the solenoid valve in the oil sprayer keeps closed condition, then the rail pressure in the common rail pipe remains unchanged or slow decreasing; When utilizing pulse signal that solenoid valve is powered up when solenoid valve is opened, spray by solenoid valve under the effect of the air pressure in common rail pipe of the fuel oil in the oil sprayer, cause the rail pressure in the common rail pipe to reduce rapidly, therefore, can monitor out by the state of changing of rail pressure in the common rail pipe on off state of solenoid valve.
Fig. 1 is method for correcting first embodiment's of oil sprayer MAP curve of the present invention flow chart.As shown in Figure 1, the method for correcting of present embodiment oil sprayer MAP curve comprises following job step:
Step 101, the rail pressure in the common rail pipe of fuel injection apparatus are when presetting rail pressure, utilize the solenoid valve of pulse signal driving oil sprayer, and the rail pressure in the Real-Time Monitoring common rail pipe.
In this step, oil pump is under R rev/min rotating speed concrete conditions in the establishment of a specific crime, can in common rail pipe, obtain the rail pressure of Mbar, disconnecting oil pump makes it stop to provide rail pressure to common rail pipe, rail pressure will remain unchanged in the common rail pipe of sealing, then utilize the pulse signal of different in width to drive solenoid valve, and the rail pressure in the Real-Time Monitoring common rail pipe.In the present embodiment, can do experiment with n oil sprayer, to improve test efficiency.N width is set is respectively Et
1, Et
2..., Et
k..., Et
nPulse signal, the width interval precision of n pulse signal is constant △ E, i.e. Et
2-Et
1=... Et
k-Et
K-1=... Et
n-Et
N-1=△ E.Utilize the pulse signal of a said n different in width to drive the solenoid valve of each oil sprayer, and the rail pressure in the Real-Time Monitoring common rail pipe, step 102 then entered.
Step 102, according to the state of changing of rail pressure in the common rail pipe, obtain the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer.
In this step, can determine the on off state of solenoid valve by the state of changing of rail pressure in the common rail pipe that real-time monitors; When the rail pressure generation step in the common rail pipe was suddenlyd change, the sign solenoid valve was opened, otherwise, then identify solenoid valve and be in closed condition.In actual applications, the step Sudden Changing Rate that can set rail pressure is △ Mbar, the concrete numerical value of △ M is determined according to model and the rail pressure of oil sprayer, the pulse signal that arranges in utilizing step 101 drives in the process of solenoid valve, when if the step Sudden Changing Rate of rail pressure surpasses 15bar or 20bar, sign solenoid valve this moment is opened and is caused the rail pressure of common rail pipe to reduce suddenly.In the present embodiment, when the pulse signal width that powers up at solenoid valve be Et
1, Et
2, Et
K-1The time, the rail pressure held stationary in the common rail pipe, the sign solenoid valve is not opened, and namely above-mentioned (k-1) individual pulse signal all can't drive the solenoid valve unlatching; When width is Et
kAnd above pulse signal is when driving solenoid valve, the rail pressure generation step sudden change in the common rail pipe, and then identifying width is Et
kPulse signal just can drive solenoid valve, at this moment, can determine that then the zero oil mass power-up time of solenoid valve is Et
k
In actual applications, for determining more accurately the zero oil mass power-up time of solenoid valve, then again with Et
kBe maximum value, take △ E/ (n-1) as spacing accuracy at Et
K-1And Et
kBetween the pulse signal of n different in width is set, then utilize n pulse signal of this setting to drive respectively each solenoid valve, if width is Et
pWhen the pulse signal on reaching drives solenoid valve, the rail pressure generation step sudden change in the common rail pipe, then the zero oil mass power-up time of explanation solenoid valve this moment is Et
pIf p=k can determine that then the zero oil mass time of adding some points of solenoid valve is Et
kIf p ≠ k is then with Et
pBe maximum value, with △ E/ (n-1)
2For spacing accuracy at Et
P-1And Et
pBetween n different in width be set pulse signal repeat above-mentioned experimental procedure because △ E/ (n-1)
2Be far smaller than △ E/ (n-1), so can obtain the zero oil mass power-up time of the less precision of solenoid valve.
Zero oil mass power-up time according to solenoid valve, can obtain the revised power-up time of solenoid valve, calculate again the injection advance angle correction value of oil sprayer according to the power-up time of solenoid valve, then calculate revised injection advance angle according to injection advance angle correction value and initial fuel injection advance angle.Because in the prior art, the material elementses such as amplification of built-up voltage, oil nozzle all may exert an influence to zero oil mass power-up time, wherein some factor can increase zero oil mass power-up time, some factor can reduce by zero oil mass power-up time, if determine zero oil mass power-up time by the factors such as amplification that detect built-up voltage, oil nozzle, its process will be very loaded down with trivial details.And in the present embodiment, directly determine the on off state of solenoid valve by closing rail pressure state of changing after the oil pump, thereby obtain the revised power-up time of solenoid valve and the revised injection advance angle of oil sprayer, avoid because need to know in detail built-up voltage, needed time of oil nozzle and various testing process, make after the correction of obtaining the revised power-up time of solenoid valve and oil sprayer the process of injection advance angle very simple, convenient, improved the efficient of obtaining the revised power-up time of solenoid valve and the revised injection advance angle of oil sprayer.
Repeat above-mentioned steps with obtain fuel injector magnetic system under each rail pressure zero oil mass power-up time and the injection advance angle of oil sprayer, obtain after the revised power-up time of solenoid valve and the revised injection advance angle of oil sprayer, enter step 103.
The injection advance angle of step 103, basis zero oil mass power-up time and oil sprayer upgrades the MAP curve of the oil sprayer under this default rail pressure.
In this step, the fuel injector magnetic system revised power-up time and the revised injection advance angle of oil sprayer under each rail pressure that obtain according to step 102, upgrade the MAP curve of fuel injector, the ECU ECU (Electrical Control Unit) can accurately be controlled fuel injection quantity according to new MAP curve, reduce oil consumption, prolong the working life of diesel engine.
In the present embodiment, determine the on off state of solenoid valve by the state of changing of rail pressure behind the oil pump fuel cut-off, thereby efficiently, obtain easily the revised power-up time of solenoid valve and the revised injection advance angle of oil sprayer, guarantee that oil sprayer can accurately control fuel injection quantity, improve output power and the fuel efficiency of diesel engine, reduce the oil consumption of diesel engine, also can effectively reduce the discharging of toxic gas in the diesel engine operation process simultaneously.
Fig. 2 is method for correcting second embodiment's of oil sprayer MAP curve of the present invention flow chart, Fig. 3 is the rail pressure change curve among method for correcting second embodiment of oil sprayer MAP curve of the present invention, and Fig. 4 is the logical flow chart that calculates injection advance angle among method for correcting second embodiment of oil sprayer MAP curve of the present invention.As shown in Figure 2, the method for correcting of present embodiment oil sprayer MAP curve comprises following job step:
The width of pulse signal is set according to the width of the inceptive impulse signal of fuel injector magnetic system in this step.In the present embodiment, the rotating speed of setting oil pump is 600 rev/mins, introduce technological scheme as an example of the rail pressure of in common rail pipe, obtaining 830bar example, wherein, diesel engine has 6 solenoid valves, according to the width of the initial MAP table setting pulse signal of oil sprayer respectively 300us, 330us, 360us, 390us, 420us and 450us, the spacing accuracy of above-mentioned 6 pulse signals is 30us.Finish test being set with after the width of pulse signal, enter step 202.
In this step, utilize the pulse signal of 6 kinds of width that arrange in the step 201 to drive each solenoid valve, simultaneously, then the situation of change of rail pressure in the Real-Time Monitoring common rail pipe enters step 203.
In this step, drive respectively 6 solenoid valves at the pulse signal that utilizes above-mentioned 6 kinds of width, wherein, width is that the pulse signal of 300us, 330us, 360us and 390us is when driving corresponding solenoid valve, the step sudden change does not occur in the rail pressure in the common rail pipe, and when width be the pulse signal of 420us and 450us drive solenoid valve the time, the rail pressure generation step sudden change in the common rail pipe.In the present embodiment, when width is the pulse signal driving solenoid valve of 420us, rail pressure change curve in the common rail pipe as shown in Figure 3, the step sudden change will occur every 100ms in the rail pressure in the common rail pipe, illustrate that width is that the pulse signal of 420us just can drive solenoid valve and opens, thereby cause the rail pressure generation step sudden change in the common rail pipe.
So, this test can determine that the zero oil mass power-up time of solenoid valve is between 390us-420us, be 420us to the maximum with zero oil mass power-up time, the spacing accuracy of pulse signal is that 30/6=5us arranges pulse signal, the width of pulse signal is respectively 420us, 415us, 410us, 405us, 400us and 395us, then utilize the pulse signal of above-mentioned 6 kinds of width to drive respectively on 6 oil sprayers, with for the second time test of beginning.
For the second time in the test, be that the pulse signal of 420us can drive solenoid valve and opens if still only have width, can determine that then zero oil mass power-up time corresponding to solenoid valve is 420us; If for the second time in the test, width all can drive the solenoid valve unlatching at 405us and above pulse signal, can determine that then the zero oil mass power-up time of solenoid valve is between 400us-405us, be 405us to the maximum with zero oil mass power-up time again, the spacing accuracy of pulse signal is that 5/6=0.83us arranges pulse signal, the width of pulse signal is respectively 405us, 404.17us, 403.34us, 402.51us, 401.68us and 400.85us tests for the third time, then utilize the pulse signal of above-mentioned width to drive each solenoid valve, if still only having for the third time width in the test is that the pulse signal of 405us can drive solenoid valve and opens, can determine that then zero oil mass power-up time corresponding to solenoid valve is 405us, otherwise, less spacing accuracy then further is set comes repeated test, to obtain the zero oil mass power-up time of solenoid valve.
In this step, by once or test of many times can determine the zero oil mass power-up time of solenoid valve, the power-up time of solenoid valve is set according to zero oil mass power-up time again, then enter step 204.
In this step, can calculate according to the power-up time of solenoid valve the injection advance angle of oil sprayer, its concrete logic flow of calculating because computational process is prior art, does not repeat them here as shown in Figure 4.Then repeating step 203 and step 204 enter step 205 to obtain fuel injector magnetic system revised power-up time and the revised injection advance angle of oil sprayer under each rail pressure.
The injection advance angle of step 205, basis zero oil mass power-up time and oil sprayer upgrades the MAP curve of the oil sprayer under this default rail pressure.
In this step, the fuel injector magnetic system that obtains according to above-mentioned steps is revised zero oil mass power-up time and the revised injection advance angle of oil sprayer under each rail pressure, can obtain the new MAP curve of the oil sprayer under this default rail pressure, then utilize the new MAP curve that obtains to upgrade the initial MAP table of oil sprayer.
In the present embodiment, determine the on off state of solenoid valve by the state of changing of rail pressure behind the oil pump fuel cut-off, thereby efficiently, obtain easily injection advance angle after the correction of power-up time and oil sprayer after the correction of solenoid valve, guarantee that oil sprayer can accurately control fuel injection quantity, improve output power and the fuel efficiency of diesel engine, reduce the oil consumption of diesel engine, also can effectively reduce the discharging of toxic gas in the diesel engine operation process simultaneously.
Fig. 5 is correcting device first embodiment's of oil sprayer MAP curve of the present invention structural representation.As shown in Figure 5, present embodiment provides a kind of correcting device of oil sprayer MAP curve, and correcting device comprises: monitoring modular 501, acquisition module 502 and the first update module 503; Wherein, monitoring modular 501 is used for when the rail pressure of the common rail pipe of oil burning installation is default rail pressure, utilize pulse signal to drive the solenoid valve of oil sprayer, rail pressure in the monitoring modular 501 Real-Time Monitoring common rail pipes, acquisition module 502 is according to the state of changing of rail pressure in the common rail pipe, obtain the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer, the first update module 503 is upgraded the MAP curve of oil sprayer under this default rail pressure according to the injection advance angle of zero oil mass power-up time and oil sprayer.
Fig. 6 is correcting device second embodiment's of oil sprayer MAP curve of the present invention structural representation.As shown in Figure 6, the correcting device of present embodiment oil sprayer MAP curve also comprises: module 504 and the second update module 505 are set, module 504 are set are respectively Et for width is set
1, Et
2..., Et
k..., Et
nN pulse signal, then utilize an above-mentioned n pulse signal once to drive corresponding solenoid valve.In the present embodiment, the spacing accuracy of pulse signal is a constant △ E, and the spacing accuracy formula of pulse signal is: △ E=Et
2-Et
1=... Et
k-Et
K-1=... Et
n-Et
N-1, k, n are natural number.The second update module 505 is used for upgrading according to the MAP curve of oil sprayer under each default rail pressure the MAP table of oil sprayer.
Further, acquisition module 502 comprises that advance angle obtains submodule 5021, and advance angle is obtained the zero oil mass power-up time that submodule 5021 is used for according to solenoid valve, obtains the injection advance angle of oil sprayer.
In the present embodiment, by the rail pressure in the monitoring modular Real-Time Monitoring common rail pipe, acquisition module by the oil pump fuel cut-off after the state of changing of rail pressure determine the on off state of solenoid valve, can obtain efficiently, easily the revised power-up time of solenoid valve and the revised injection advance angle of oil sprayer, utilize the second update module to upgrade the MAP table of oil sprayer, guarantee that oil sprayer can accurately control fuel injection quantity, improve output power and the fuel efficiency of diesel engine, reduce the oil consumption of diesel engine, also can effectively reduce the discharging of toxic gas in the diesel engine operation process simultaneously.
The present invention also provides a kind of engine fuel supply system, comprising the correcting device of as shown in Figure 5 oil sprayer MAP curve.
Be understandable that above mode of execution only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement also are considered as protection scope of the present invention.
Claims (10)
1. the method for correcting of an oil sprayer MAP curve is characterized in that comprising:
When the rail pressure in the common rail pipe of fuel injection apparatus is default rail pressure, utilize the solenoid valve of pulse signal driving oil sprayer, and the rail pressure in the Real-Time Monitoring common rail pipe;
According to the state of changing of rail pressure in the common rail pipe, obtain the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer;
Upgrade the MAP curve of oil sprayer under this default rail pressure according to the injection advance angle of described zero oil mass power-up time and oil sprayer.
2. the method for correcting of oil sprayer MAP curve according to claim 1 is characterized in that, described state of changing according to rail pressure in the common rail pipe is obtained the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer and comprised:
During the sudden change of the rail pressure generation step of described common rail pipe, pulse signal drives described solenoid valve and opens, and obtains zero oil mass power-up time according to the width of this pulse signal.
3. the method for correcting of oil sprayer MAP curve according to claim 2 is characterized in that, described state of changing according to rail pressure in the common rail pipe is obtained the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer and also comprised:
According to the zero oil mass power-up time of described solenoid valve, obtain the injection advance angle of described oil sprayer.
4. the method for correcting of oil sprayer MAP curve according to claim 1 is characterized in that, the described solenoid valve that utilizes pulse signal to drive oil sprayer, and also comprise before the rail pressure step in the Real-Time Monitoring common rail pipe:
Width is set is respectively Et
1, Et
2..., Et
k..., Et
nN pulse signal;
Wherein, the spacing accuracy of pulse signal is constant △ E, the spacing accuracy △ E=Et of pulse signal
2-Et
1=... Et
k-Et
K-1=... Et
n-Et
N-1, k, n are natural number.
5. the method for correcting of oil sprayer MAP curve according to claim 1 characterized by further comprising:
Upgrade the MAP table of described oil sprayer according to the MAP curve of oil sprayer under each default rail pressure.
6. the correcting device of an oil sprayer MAP curve is characterized in that comprising:
Monitoring modular when being used for rail pressure at the common rail pipe of internal-combustion engine for default rail pressure, utilizes pulse signal to drive the solenoid valve of oil sprayer and the rail pressure in the Real-Time Monitoring common rail pipe;
Acquisition module is used for the state of changing according to the common rail pipe rail pressure, obtains the zero oil mass power-up time of solenoid valve and the injection advance angle of oil sprayer;
The first update module is used for upgrading according to the injection advance angle of described zero oil mass power-up time and oil sprayer the MAP curve of oil sprayer under this default rail pressure.
7. the correcting device of oil sprayer MAP curve according to claim 6 is characterized in that, also comprises:
Module is set, is used for that width is set and is respectively Et
1, Et
2..., Et
k..., Et
nPulse signal, then utilize said n pulse signal to drive solenoid valve;
Wherein, the spacing accuracy of pulse signal is constant △ E, the spacing accuracy △ E=Et of pulse signal
2-Et
1=... Et
k-Et
K-1=... Et
n-Et
N-1, k, n are natural number.
8. the correcting device of oil sprayer MAP curve according to claim 6 is characterized in that, also comprises:
The second update module is used for the MAP table according to the MAP curve renewal oil sprayer of oil sprayer under each default rail pressure.
9. the correcting device of oil sprayer MAP curve according to claim 6 is characterized in that, described acquisition module comprises: advance angle is obtained submodule;
Described advance angle is obtained submodule for the power-up time according to described solenoid valve, obtains the injection advance angle of described oil sprayer.
10. an engine fuel supply system is characterized in that, comprises the correcting device of the arbitrary described oil sprayer MAP curve of claim 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196118.1A CN103352763B (en) | 2013-05-24 | 2013-05-24 | The method for correcting of oil sprayer MAP curve, device and engine fuel supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310196118.1A CN103352763B (en) | 2013-05-24 | 2013-05-24 | The method for correcting of oil sprayer MAP curve, device and engine fuel supply system |
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| Publication Number | Publication Date |
|---|---|
| CN103352763A true CN103352763A (en) | 2013-10-16 |
| CN103352763B CN103352763B (en) | 2015-12-23 |
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| CN201310196118.1A Expired - Fee Related CN103352763B (en) | 2013-05-24 | 2013-05-24 | The method for correcting of oil sprayer MAP curve, device and engine fuel supply system |
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| CN109072803A (en) * | 2016-04-27 | 2018-12-21 | 法国大陆汽车公司 | Method for diagnosing the operation of the diesel engine injector of motor vehicles |
| CN111156651A (en) * | 2020-01-14 | 2020-05-15 | 珠海格力电器股份有限公司 | Gulp valve control method, compressor, air conditioner, memory and controller |
| CN111173634A (en) * | 2019-12-20 | 2020-05-19 | 潍柴动力股份有限公司 | Oil injection control method, device and equipment in engine starting process and storage medium |
| CN115142976A (en) * | 2022-07-07 | 2022-10-04 | 潍柴动力股份有限公司 | Method and device for determining zero-oil calibration time |
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| CN103835851A (en) * | 2013-12-06 | 2014-06-04 | 潍柴动力股份有限公司 | Oil atomizer model selection method and device |
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| CN107366597A (en) * | 2017-09-15 | 2017-11-21 | 河南柴油机重工有限责任公司 | A kind of layout pattern of electronic control system in marine high-speed high-power diesel engine |
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| CN111173634A (en) * | 2019-12-20 | 2020-05-19 | 潍柴动力股份有限公司 | Oil injection control method, device and equipment in engine starting process and storage medium |
| CN111156651A (en) * | 2020-01-14 | 2020-05-15 | 珠海格力电器股份有限公司 | Gulp valve control method, compressor, air conditioner, memory and controller |
| CN115142976A (en) * | 2022-07-07 | 2022-10-04 | 潍柴动力股份有限公司 | Method and device for determining zero-oil calibration time |
| CN115142976B (en) * | 2022-07-07 | 2024-05-17 | 潍柴动力股份有限公司 | Method and device for determining zero oil quantity calibration time |
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