CN103277204B - A kind of high-pressure oil passage modeling method and device - Google Patents
A kind of high-pressure oil passage modeling method and device Download PDFInfo
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- CN103277204B CN103277204B CN201310210074.3A CN201310210074A CN103277204B CN 103277204 B CN103277204 B CN 103277204B CN 201310210074 A CN201310210074 A CN 201310210074A CN 103277204 B CN103277204 B CN 103277204B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000002347 injection Methods 0.000 claims abstract description 138
- 239000007924 injection Substances 0.000 claims abstract description 138
- 239000000446 fuel Substances 0.000 claims abstract description 103
- 230000010354 integration Effects 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 315
- 239000000295 fuel oil Substances 0.000 claims description 33
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000010587 phase diagram Methods 0.000 claims description 6
- 230000001052 transient effect Effects 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000011217 control strategy Methods 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
Embodiments provide a kind of high-pressure oil passage modeling method and device, by calculate high pressure oil pump working unit circulation in effective force feed time and oil sprayer working unit circulation in injection time, determine that high pressure oil rail flows into the oil-feed rate of amount of fuel within described effective force feed time, and in injection time, flow out the oil yielding rate of fuel injection quantity, and the algebraic sum of oil-feed rate and described oil yielding rate is carried out time integral, the rail pressure of high pressure oil rail is obtained according to the result after integration, because oil-feed rate is the mean value in effective force feed time, oil yielding rate is the mean value in injection time, therefore, in the circulation of motor working unit, oil-feed rate and oil yielding rate are all no longer mean value, and the transient changing of rail pressure of high pressure oil rail when can embody high pressure oil pump pump oil and oil sprayer oil spout, therefore, the rail pressure of the high pressure oil rail obtained is more accurate, thus more accurate high-pressure oil passage model can be set up, meet the testing requirement of sophisticated strategies controller further.
Description
Technical field
The present invention relates to engine art, particularly relate to a kind of high-pressure oil passage modeling method and device.
Background technique
In engine operational cycle, the fuel flow of the fuel flow that high pressure oil pump pumps and oil sprayer ejection is pulsed with crank angle (or time), is not mean value.Accordingly, the pressure in high pressure oil rail can produce transient wave at pump oil or fuel-displaced moment.
At present, carry out certain simplification when carrying out the modeling of high-pressure oil passage to the modeling pattern that high-pressure oil passage is comparatively general: think that the pump oil flow of high pressure oil pump and the oil spout flow of oil sprayer are average in work cycle, namely pump from high pressure oil pump to high pressure oil rail oil process and oil sprayer average process from the fuel-displaced process of high pressure oil rail, transient performance is simplified to the average behavior in the unit time.Therefore, in the random time of this modeling pattern acquiescence in working unit circulation, the mass flowrate of inflow and outflow high pressure oil rail is constant, and rail pressure does not also just exist transient wave.
Existing this high-pressure oil passage model can meet general hardware in loop (Hardware-In-the-Loop, be called for short HIL) test of system middle controller related control strategies, and along with the raising of motor and automobile emissions standards, the control strategy of controller becomes increasingly complex, therefore, need the model of more accurate high-pressure oil passage when test controller, the high-pressure oil passage model after above-mentioned simplification cannot satisfy the demands.
Summary of the invention
In view of this, embodiments provide a kind of high-pressure oil passage modeling method, object is to solve the problem that high-pressure oil passage model that existing high-pressure oil passage modeling method obtains cannot meet the requirement of complicated controller test.
To achieve these goals, following technological scheme is embodiments provided:
A kind of high-pressure oil passage modeling method, comprising:
Calculate the amount of fuel being entered high pressure oil pump in working unit circulation by low pressure oil way;
According to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determine the effective force feed time of described high pressure oil pump in described working unit circulation;
Calculate the oil-feed rate flowing into the fuel oil of described amount of fuel within described effective force feed time to described high pressure oil rail;
Obtain the fuel injection quantity of oil sprayer in described working unit circulation;
The injection time of described oil sprayer in described working unit circulation is determined according to injection advance angle and fuel injection pulsewidth;
Calculate the oil yielding rate being flowed out the fuel oil of described fuel injection quantity in described injection time by described high pressure oil rail;
The algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, obtains the rail pressure of described high pressure oil rail according to the result after integration, to complete, modeling is carried out to described high-pressure oil passage.
Preferably, the amount of fuel that described calculating enters high pressure oil pump by low pressure oil way in working unit circulation comprises:
The number of cylinders of the oil pump control signal sent according to the controller of described high-pressure oil passage and oil pump flow characteristic, oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way.
Preferably, described according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determine that the effective force feed time of described high pressure oil pump in described working unit circulation comprises:
According to the phase diagram of engine crankshaft, camshaft and high pressure oil pump camshaft, obtain in the circulation of described working unit described high pressure oil pump piston compression to first crank angle of top dead center phase for bent axle zero point;
Gather second crank angle of motor relative to bent axle zero point during closed electromagnetic valve in described working unit circulation;
According to described first crank angle, described second crank angle and engine speed, determine the effective force feed time of described high pressure oil pump in described working unit circulation.
Preferably, the fuel injection quantity of described acquisition oil sprayer in described working unit circulation comprises:
According to the characteristic inquiry bivariate table of fuel injection pulsewidth, rail pressure and oil sprayer, obtain the every cylinder of motor total fuel injection quantity in working unit circulation, as the fuel injection quantity of oil sprayer.
Preferably, described foundation injection advance angle and fuel injection pulsewidth determine that the injection time of described oil sprayer in described working unit circulation comprises:
Injection advance angle is converted into the first angle relative to bent axle, the actual rotational angle of described bent axle is equaled the moment of described first angle as oil spout initial time;
Using the finish time of the duration of fuel injection pulsewidth as the end of injection moment;
Using the difference of described end of injection moment and described oil spout initial time as the injection time of described oil sprayer in described working unit circulates.
A kind of high-pressure oil passage model building device, comprising:
Amount of fuel computing module, for calculating the amount of fuel being entered high pressure oil pump in working unit circulation by low pressure oil way;
Effective force feed time determination module, for according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determines the effective force feed time of described high pressure oil pump in described working unit circulation;
Oil-feed rate computing module, for calculating the oil-feed rate flowing into the fuel oil of described amount of fuel within described effective force feed time to described high pressure oil rail;
Fuel injection quantity acquisition module, for obtaining the fuel injection quantity of oil sprayer in described working unit circulation;
Injection time determination module, for determining the injection time of described oil sprayer in described working unit circulation according to injection advance angle and fuel injection pulsewidth;
Oil yielding rate computing module, for calculating the oil yielding rate of the fuel oil being flowed out described fuel injection quantity in described injection time by described high pressure oil rail;
Rail pressure computing module, for the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, obtains the rail pressure of described high pressure oil rail, carries out modeling to complete to described high-pressure oil passage according to the result after integration.
Preferably, described amount of fuel computing module comprises:
Amount of fuel computing unit, for the number of cylinders of the oil pump control signal that sends according to the controller of described high-pressure oil passage and oil pump flow characteristic, oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way.
Preferably, described effective force feed time determination module comprises:
First crank angle acquiring unit, for the phase diagram according to engine crankshaft, camshaft and high pressure oil pump camshaft, obtain in the circulation of described working unit described high pressure oil pump piston compression to first crank angle of top dead center phase for bent axle zero point;
Second crank angle collecting unit, for gathering second crank angle of motor relative to bent axle zero point during closed electromagnetic valve in described working unit circulation;
Effective force feed time determining unit, for according to described first crank angle, described second crank angle and engine speed, determines the effective force feed time of described high pressure oil pump in described working unit circulation.
Preferably, described fuel injection quantity acquisition module comprises:
Fuel injection quantity acquiring unit, for the characteristic inquiry bivariate table according to fuel injection pulsewidth, rail pressure and oil sprayer, obtains the every cylinder of motor total fuel injection quantity in working unit circulation, as the fuel injection quantity of oil sprayer.
Preferably, described injection time determination module comprises:
Initial time determining unit, for injection advance angle being converted into the first angle relative to bent axle, equals using the actual rotational angle of described bent axle to the moment of described first angle as oil spout initial time;
Finish time determining unit, for finish time of the duration using fuel injection pulsewidth as the end of injection moment;
Injection time computing unit, for using the difference in described end of injection moment and described oil spout initial time as the injection time of described oil sprayer in described working unit circulates.High-pressure oil passage modeling method described in the embodiment of the present invention and device, by calculating the effective force feed time of high pressure oil pump in the circulation of described working unit and the injection time of oil sprayer in described working unit circulation, determine that described high pressure oil rail flows into the oil-feed rate of amount of fuel within described effective force feed time, and in described injection time, flow out the oil yielding rate of fuel injection quantity, and the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, the rail pressure of described high pressure oil rail is obtained according to the result after integration, because oil-feed rate is the mean value in effective force feed time, oil yielding rate is the mean value in injection time, therefore, in working unit circulation, oil-feed rate and oil yielding rate are all no longer mean value, and the transient changing of rail pressure of high pressure oil rail when can embody high pressure oil pump pump oil and oil sprayer oil spout, therefore, the rail pressure of the high pressure oil rail obtained is more accurate, thus more accurate high-pressure oil passage model can be set up, meet the testing requirement of sophisticated strategies controller further.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The flow chart of Fig. 1 a kind of high-pressure oil passage modeling method disclosed in the embodiment of the present invention;
Fig. 2 is the flow chart of the embodiment of the present invention another high-pressure oil passage modeling method disclosed;
The structural representation of Fig. 3 a kind of high-pressure oil passage model building device disclosed in the embodiment of the present invention;
Fig. 4 is the structural representation of the embodiment of the present invention another high-pressure oil passage model building device disclosed.
Embodiment
The embodiment of the invention discloses a kind of high-pressure oil passage modeling method, its central inventive point is, in the working unit circulation of high-pressure oil passage, determine effective force feed time of high pressure oil pump and the injection time of oil sprayer, thus obtain the oil-feed rate within effective force feed time and the oil yielding rate in injection time, and then according to oil-feed rate and oil yielding rate determination rail pressure because oil-feed rate and oil yielding rate are no longer working units circulate in mean value, therefore, it is possible to the transient wave of simulation rail pressure.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of high-pressure oil passage modeling method disclosed in the embodiment of the present invention, as shown in Figure 1, comprising:
S101: calculate the amount of fuel being entered high pressure oil pump in working unit circulation by low pressure oil way;
S102: according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determines the effective force feed time of described high pressure oil pump in described working unit circulation;
Usually, the running of high pressure oil pump piston from lower dead center to top dead center is called the force feed stroke of high pressure oil pump, in this course, only have when the oil pressure in plunger cavity is compressed to the oil pressure be greater than in high pressure oil rail, one-way valve between high-pressure service pump and oily rail just can be opened under the effect of pressure reduction, fuel oil just can flow into oily rail from high pressure oil pump, be opened to piston from one-way valve and run to time between compression top center, effective force feed time can be defined as, force feed stroke At All Other Times, can be defined as the non-effective force feed time.
S103: calculate fuel oil within described effective force feed time and be pressed into the oil-feed rate of described high pressure oil rail;
As mentioned above, fuel oil is pressed into high pressure oil rail in effective force feed time, and therefore, in the present embodiment, high pressure oil pump can regard following process as to the process of high pressure oil rail press-in fuel oil:
Within effective force feed time, whole fuel oil is pressed into high pressure oil rail, and within the non-effective force feed time, fuel oil is not had to be pressed into high pressure oil rail, namely for each operation of oil pump cylinder, fuel injection quantity total within a work cycle is on average pressed into described high pressure oil rail within the corresponding effectively force feed time, and the fuel flow entering high pressure oil rail within the non-effective force feed time is zero.
By amount of fuel divided by effective force feed time, be the oil-feed rate flowing into the fuel oil of described amount of fuel in described effective force feed time to described high pressure oil rail.
S104: obtain the fuel injection quantity of oil sprayer in described working unit circulation;
S105: determine the injection time of described oil sprayer in described working unit circulation according to injection advance angle and fuel injection pulsewidth;
When described injection advance angle is oil sprayer commencement of fuel injection, the crank angle of plunger distance compression top center, is called injection advance angle.
Described fuel injection pulsewidth is the time span that Engine ECU controls each oil spout of oil sprayer.
S106: the oil yielding rate calculating the fuel oil being flowed out described fuel injection quantity in described injection time by described high pressure oil rail;
Similarly, in the present embodiment, the process of oil spout is regarded as: fuel injection quantity is according to the ejection of fixing injection rate in corresponding injection time, and in non-injection time within a work cycle, the injection rate of oil sprayer is zero.
S107: the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, calculates the rail pressure of described high pressure oil rail, to complete, modeling is carried out to described high-pressure oil passage; That is, namely modeling process is completed after obtaining the rail pressure of high pressure oil rail.
Wherein, the rail pressure calculating described high pressure oil rail according to the result after integration further can use existing computational methods, repeats no more here.
Particularly, after obtaining integral result, rail pressure can be obtained in conjunction with fuel oil elastic model and oily rail volume calculations.
It should be noted that, the time interval of the time integral described in the present embodiment is the time of model running.
High-pressure oil passage modeling method described in the present embodiment, by oil-feed rate and oil yielding rate determination rail pressure, therefore, compared with the existing methods, the rail pressure obtained can embody the transient state waveguide of actual rail pressure, therefore, the model set up thus is more accurate, thus can meet the testing requirement of the controller of sophisticated strategies.
The embodiment of the present invention another high-pressure oil passage modeling method disclosed, is applied to following scene:
The high pressure oil rail that high-pressure oil passage comprises high pressure oil pump, is connected with high pressure oil pump, the oil sprayer be connected with high pressure oil rail, first the fuel oil flowed into from low pressure oil system enters high pressure oil pump, then high pressure oil rail is pumped to by high pressure oil pump, eventually through the unlatching of fuel injector magnetic system, spray into cylinder through fuel injector magnetic system.During engine operation, when the pressure in high-pressure service pump plunger is greater than the pressure in high pressure oil rail chamber, namely fuel oil in high pressure oil pump is pressed in high pressure oil rail, and the fuel oil in high pressure oil rail, when the solenoid valve of oil sprayer is opened, sprays in cylinder through oil sprayer and burns.
As shown in Figure 2, described method comprises:
S201: the parameter according to described high-pressure oil passage: the number of cylinders of the oil pump control signal that controller sends and oil pump flow characteristic, oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way;
S202: according to the phase diagram of engine crankshaft, camshaft and high pressure oil pump camshaft, obtains in the circulation of described working unit described high pressure oil pump piston compression to first crank angle of top dead center phase for bent axle zero point;
S203: gather motor in the circulation of described working unit the closed electromagnetic valve moment relative to second crank angle at bent axle zero point;
In the present embodiment, second crank angle can represent the close moment of high pressure oil pump solenoid valve, and the close moment of high pressure oil pump solenoid valve (this signal is controlled by ECU, during closed electromagnetic valve, fuel oil in cylinder starts to be compressed) simplification in the moment that one-way valve is opened can be regarded as, that is, the close moment of the solenoid valve of high pressure oil pump can represent the moment of one-way valve opens, this simplifies the deviation calculating and produce, and can carry out coefficient correction by actual rail pressure.
In the present embodiment, can by the second crankshaft angles relative to bent axle zero point during closed electromagnetic valve in the hardware board collection motor working unit circulation of HIL system.
S204: according to described first crank angle, described second crank angle and engine speed, determines the effective force feed time of described high pressure oil pump in described working unit circulation;
Wherein, according to the first crank angle, described second crank angle and engine speed, the formula calculating effective force feed time is as follows:
Effective force feed time [s]=(the second crank angle [rad]-the first crank angle [rad])/engine speed [rad/s].
S205: calculate the result of described amount of fuel divided by effective force feed time, obtains the oil-feed rate in described effective force feed time inner high voltage oil rail;
S206: according to the characteristic bivariate table of fuel injection pulsewidth, rail pressure and oil sprayer, obtains the fuel injection quantity that the every cylinder of motor is total in working unit circulation, as the fuel injection quantity of oil sprayer;
S207: injection advance angle is converted into the first angle relative to bent axle, equals using the actual rotational angle of described bent axle to the moment of described first angle as oil spout initial time;
S208: using the finish time of the duration of fuel injection pulsewidth as the end of injection moment;
S209: using the difference of described end of injection moment and described oil spout initial time as the injection time of described oil sprayer in described working unit circulates;
S210: calculate the result of described fuel injection quantity divided by described injection time, obtain the oil yielding rate of the fuel oil being flowed out described fuel injection quantity in described injection time by described high pressure oil rail;
S211: the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, calculates the rail pressure of described high pressure oil rail further, so that carry out modeling to described high-pressure oil passage.
High-pressure oil passage modeling method described in the present embodiment, the oil pump control signal sent according to the controller of described high-pressure oil passage and oil pump flow characteristic, the number of cylinders of oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way, according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determine the effective force feed time of described high pressure oil pump in described working unit circulation, the injection time of described oil sprayer in described working unit circulation is determined according to injection advance angle and fuel injection pulsewidth, it is and uses the existing parameter of high-pressure oil passage to calculate, therefore, exploitativeness is higher, use the model of the high-pressure oil passage of described method establishment can simulate rail pressure with high pressure oil pump pump oil and the transient wave that causes of oil sprayer oil spout, more accurately reflect the real work process of engine oil path, be conducive to the test of HIL system middle controller related control strategies.
Embodiment is corresponding with said method, the embodiment of the invention also discloses a kind of high-pressure oil passage model building device, as shown in Figure 3, comprising:
Amount of fuel computing module 301, for calculating the amount of fuel being entered high pressure oil pump in working unit circulation by low pressure oil way;
Effective force feed time determination module 302, for according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determines the effective force feed time of described high pressure oil pump in described working unit circulation;
Oil-feed rate computing module 303, for calculating the oil-feed rate flowing into the fuel oil of described amount of fuel within described effective force feed time to described high pressure oil rail;
Fuel injection quantity acquisition module 304, for obtaining the fuel injection quantity of oil sprayer in described working unit circulation;
Injection time determination module 305, for determining the injection time of described oil sprayer in described working unit circulation according to injection advance angle and fuel injection pulsewidth;
Oil yielding rate computing module 306, for calculating the oil yielding rate of the fuel oil being flowed out described fuel injection quantity in described injection time by described high pressure oil rail;
Rail pressure computing module 307, for the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, calculates the rail pressure of described high pressure oil rail, further so that carry out modeling to described high-pressure oil passage according to the result after integration.
The specific works flow process of device described in the present embodiment as described in Figure 1, repeats no more here.
High-pressure oil passage modeling method described in the present embodiment, by the oil-feed rate in effective force feed time and the oil yielding rate determination rail pressure in effective injection time, therefore, compared with the existing methods, the rail pressure obtained can embody the transient state waveguide of actual rail pressure, therefore, the model set up thus is more accurate, thus can meet the testing requirement of the controller of sophisticated strategies.
The embodiment of the present invention another high-pressure oil passage model building device disclosed, as shown in Figure 4, comprising:
Amount of fuel computing unit 401, for the number of cylinders of the oil pump control signal that sends according to the controller of described high-pressure oil passage and oil pump flow characteristic, oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way;
First crank angle acquiring unit 402, for the phase diagram according to engine crankshaft, camshaft and high pressure oil pump camshaft, obtain in the circulation of described working unit described high pressure oil pump piston compression to first crank angle of top dead center phase for bent axle zero point;
Second crank angle collecting unit 403, for gathering second crank angle of motor relative to bent axle zero point during closed electromagnetic valve in described working unit circulation;
Effective force feed time determining unit 404, for according to described first crank angle, described second crank angle and engine speed, determines the effective force feed time of described high pressure oil pump in described working unit circulation;
Oil-feed rate computing module 405, for calculating the oil-feed rate flowing into the fuel oil of described amount of fuel within described effective force feed time to described high pressure oil rail;
Fuel injection quantity acquiring unit 406, for the characteristic inquiry bivariate table according to fuel injection pulsewidth, rail pressure and oil sprayer, obtains the every cylinder of motor total fuel injection quantity in working unit circulation, as the fuel injection quantity of oil sprayer.
Initial time determining unit 407, for injection advance angle being converted into the first angle relative to bent axle, equals using the actual rotational angle of described bent axle to the moment of described first angle as oil spout initial time;
Finish time determining unit 408, for finish time of the duration using fuel injection pulsewidth as the end of injection moment;
Injection time computing unit 409, for using the difference in described end of injection moment and described oil spout initial time as the injection time of described oil sprayer in described working unit circulates;
Oil yielding rate computing module 410, for calculating the oil yielding rate of the fuel oil being flowed out described fuel injection quantity in described injection time by described high pressure oil rail;
Rail pressure computing module 411, for the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, calculates the rail pressure of described high pressure oil rail further;
Device described in the present embodiment carries out the specific works flow process of modeling as shown in Figure 2, repeats no more here.
The model of the high-pressure oil passage that high-pressure oil passage model building device described in the present embodiment is set up can simulate the transient wave that rail pressure causes with high pressure oil pump pump oil and oil sprayer oil spout, more accurately reflect the real work process of engine oil path, be conducive to the test of HIL system middle controller related control strategies.
If the function described in the present embodiment method using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a calculating equipment read/write memory medium.Based on such understanding, the part of the part that the embodiment of the present invention contributes to prior art or this technological scheme can embody with the form of software product, this software product is stored in a storage medium, comprising some instructions in order to make a calculating equipment (can be personal computer, server, mobile computing device or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment same or similar part mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a high-pressure oil passage modeling method, is characterized in that, comprising:
Calculate the amount of fuel being entered high pressure oil pump in working unit circulation by low pressure oil way;
According to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determine the effective force feed time of described high pressure oil pump in described working unit circulation;
Calculate the oil-feed rate flowing into the fuel oil of described amount of fuel within described effective force feed time to described high pressure oil rail;
Obtain the fuel injection quantity of oil sprayer in described working unit circulation;
The injection time of described oil sprayer in described working unit circulation is determined according to injection advance angle and fuel injection pulsewidth;
Calculate the oil yielding rate being flowed out the fuel oil of described fuel injection quantity in described injection time by described high pressure oil rail;
The algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, obtains the rail pressure of described high pressure oil rail according to the result after integration, to complete, modeling is carried out to described high-pressure oil passage;
Wherein, described effective force feed time is the time that piston that one-way valve between described high pressure oil pump and described high pressure oil rail is opened to high pressure oil pump runs between top dead center.
2. method according to claim 1, is characterized in that, the amount of fuel that described calculating enters high pressure oil pump by low pressure oil way in working unit circulation comprises:
The number of cylinders of the oil pump control signal sent according to the controller of described high-pressure oil passage and oil pump flow characteristic, oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way.
3. method according to claim 1 and 2, is characterized in that, described according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determines that the effective force feed time of described high pressure oil pump in described working unit circulation comprises:
According to the phase diagram of engine crankshaft, camshaft and high pressure oil pump camshaft, obtain in the circulation of described working unit described high pressure oil pump piston compression to first crank angle of top dead center phase for bent axle zero point;
Gather second crank angle of motor relative to bent axle zero point during closed electromagnetic valve in described working unit circulation;
According to described first crank angle, described second crank angle and engine speed, determine the effective force feed time of described high pressure oil pump in described working unit circulation.
4. method according to claim 1, is characterized in that, the fuel injection quantity of described acquisition oil sprayer in described working unit circulation comprises:
According to the characteristic inquiry bivariate table of fuel injection pulsewidth, rail pressure and oil sprayer, obtain the every cylinder of motor total fuel injection quantity in working unit circulation, as the fuel injection quantity of oil sprayer.
5. the method according to claim 1 or 4, is characterized in that, described foundation injection advance angle and fuel injection pulsewidth determine that the injection time of described oil sprayer in described working unit circulation comprises:
Injection advance angle is converted into the first angle relative to bent axle, the actual rotational angle of described bent axle is equaled the moment of described first angle as oil spout initial time;
Using the finish time of the duration of fuel injection pulsewidth as the end of injection moment;
Using the difference of described end of injection moment and described oil spout initial time as the injection time of described oil sprayer in described working unit circulates.
6. a high-pressure oil passage model building device, is characterized in that, comprising:
Amount of fuel computing module, for calculating the amount of fuel being entered high pressure oil pump in working unit circulation by low pressure oil way;
Effective force feed time determination module, for according to the camshaft of described high pressure oil pump and the phase relationship of bent axle, determines the effective force feed time of described high pressure oil pump in described working unit circulation;
Oil-feed rate computing module, for calculating the oil-feed rate flowing into the fuel oil of described amount of fuel within described effective force feed time to described high pressure oil rail;
Fuel injection quantity acquisition module, for obtaining the fuel injection quantity of oil sprayer in described working unit circulation;
Injection time determination module, for determining the injection time of described oil sprayer in described working unit circulation according to injection advance angle and fuel injection pulsewidth;
Oil yielding rate computing module, for calculating the oil yielding rate of the fuel oil being flowed out described fuel injection quantity in described injection time by described high pressure oil rail;
Rail pressure computing module, for the algebraic sum of described oil-feed rate and described oil yielding rate is carried out time integral, obtains the rail pressure of described high pressure oil rail, carries out modeling to complete to described high-pressure oil passage according to the result after integration;
Wherein, described effective force feed time is the time that piston that one-way valve between described high pressure oil pump and described high pressure oil rail is opened to high pressure oil pump runs between top dead center.
7. device according to claim 6, is characterized in that, described amount of fuel computing module comprises:
Amount of fuel computing unit, for the number of cylinders of the oil pump control signal that sends according to the controller of described high-pressure oil passage and oil pump flow characteristic, oil pump, piston area, stroke, fuel oil Young's modulus and current rail pressure, calculate the amount of fuel being entered high pressure oil pump by low pressure oil way.
8. the device according to claim 6 or 7, is characterized in that, described effective force feed time determination module comprises:
First crank angle acquiring unit, for the phase diagram according to engine crankshaft, camshaft and high pressure oil pump camshaft, obtain in the circulation of described working unit described high pressure oil pump piston compression to first crank angle of top dead center phase for bent axle zero point;
Second crank angle collecting unit, for gathering second crank angle of motor relative to bent axle zero point during closed electromagnetic valve in described working unit circulation;
Effective force feed time determining unit, for according to described first crank angle, described second crank angle and engine speed, determines the effective force feed time of described high pressure oil pump in described working unit circulation.
9. device according to claim 6, is characterized in that, described fuel injection quantity acquisition module comprises:
Fuel injection quantity acquiring unit, for the characteristic inquiry bivariate table according to fuel injection pulsewidth, rail pressure and oil sprayer, obtains the every cylinder of motor total fuel injection quantity in working unit circulation, as the fuel injection quantity of oil sprayer.
10. the device according to claim 6 or 9, is characterized in that, described injection time determination module comprises:
Initial time determining unit, for injection advance angle being converted into the first angle relative to bent axle, equals using the actual rotational angle of described bent axle to the moment of described first angle as oil spout initial time;
Finish time determining unit, for finish time of the duration using fuel injection pulsewidth as the end of injection moment;
Injection time computing unit, for using the difference in described end of injection moment and described oil spout initial time as the injection time of described oil sprayer in described working unit circulates.
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| CN103883416B (en) * | 2014-03-27 | 2016-02-10 | 潍柴动力股份有限公司 | A kind of oil pump control method and device |
| CN104090495A (en) * | 2014-06-28 | 2014-10-08 | 中国北方发动机研究所(天津) | High-power electric control diesel engine pump nozzle fuel supply system modeling method |
| CN108691660B (en) * | 2017-04-07 | 2022-03-15 | 罗伯特·博世有限公司 | Method for correcting fuel injection quantity deviation of diesel engine and diesel engine system |
| CN110821696B (en) * | 2019-11-21 | 2022-05-03 | 南京邮电大学 | Method for controlling oil pressure of high-pressure oil pipe of engine |
| CN111143980B (en) * | 2019-12-17 | 2022-03-22 | 淮阴工学院 | Method for calculating opening of check valve of high-pressure oil pipe |
| CN112855375B (en) * | 2021-02-18 | 2022-05-24 | 中国第一汽车股份有限公司 | Control method and device of oil injector, electronic equipment and storage medium |
| CN114033570B (en) * | 2021-11-26 | 2024-04-09 | 重庆红江机械有限责任公司 | Rail pressure control method and system for common rail diesel engine, common rail diesel engine and storage medium |
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