CN103511106A - Fuel injection controlling apparatus optimized in multiple injection - Google Patents
Fuel injection controlling apparatus optimized in multiple injection Download PDFInfo
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- CN103511106A CN103511106A CN201310296382.2A CN201310296382A CN103511106A CN 103511106 A CN103511106 A CN 103511106A CN 201310296382 A CN201310296382 A CN 201310296382A CN 103511106 A CN103511106 A CN 103511106A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
- F02D2200/0604—Estimation of fuel pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
- F02D2200/0616—Actual fuel mass or fuel injection amount determined by estimation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0618—Actual fuel injection timing or delay, e.g. determined from fuel pressure drop
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
An apparatus for controlling multiple injection of an internal combustion engine comprises: a detection means for detecting a multiple injection waveform that indicates fule pressure changes, a storage means for storing a model profile that determines a model profile when the previous injection is performed while the reference injection is not performed during the multiple injection, a removal means for taking out a pressure waveform of the reference injection as a reference waveform, a first calculating means for calculating a reference pressure based on a fuel pressure when a fuel injection is not performed in the reference curve, and a second calculating means for calculating a maximum injection rate of the reference fuel injection based on a first parameter in the reference waveform indicating a value of a reduction of the fuel pressure from the reference pressure response to be carried out reference injection, and a second parameter, which is the fuel pressure of the model profile when the reference injection is performed .
Description
Technical field
Present disclosure relates to a kind of for being arranged on the fuel injection control system of the internal-combustion engine on vehicle.
Background technique
The fuel that fuel injection control system controls to internal-combustion engine via Fuelinjection nozzle sprays.Specifically, the fuel of fuel injection control system based in response to from Fuelinjection nozzle sprays and the variation of the fuel pressure that occurs, determines the spray regime of in check injection events (that is, object sprays) and controls Fuelinjection nozzle.
For accurately output torque and the emission state of controlling combustion engine, importantly to accurately control the spray regime of fuel injection event, such as the emitted dose of the fuel from fuel injection valves inject, injection beginning time etc.About this control operation, JP-A-2010-3004 discloses following control operation.
In control operation, fuel pressure sensor detects the variation of the fuel pressure occurring in response to the injection events in fuel feed lines, and this fuel feed lines extends to the nozzle of Fuelinjection nozzle.As a result, the Spraying rate waveform (spray regime) of actual ejection event detected.Based on Spraying rate waveform, set the injection command signal of post-injection event.Thereby spray regime is accurately controlled the state of expectation.
When carrying out multi-injection (wherein carrying out multiple fuel injection event in every single burn cycle), must consider following content.In other words, in the pressure waveform being detected by fuel pressure sensor during multi-injection (multi-injection detection waveform), because residual waveform component and pressure waveform that the injection events before spraying at object produces are overlapping.
Therefore, in JP-A-2010-3004, pre-stored model curve is as mathematical formulae, and this model curve has represented the pressure waveform when previous injection events is performed as individual event.The waveform detecting from above-mentioned multi-injection, deduct this model curve.Therefore the pressure waveform (object waveform), spraying owing to object can be extracted.Object waveform based on extracted detects actual spray regime subsequently.
Yet by the relevant various experiments of the aforementioned content to being implemented by the present inventor, inventor finds that deviation occurs between the maximum injection rate and actual maximum injection rate based on object waveshape.In other words because object waveform can reference model curve represent that relative pressure changes, therefore eliminated the impact on maximum injection rate of the model curve that is separated with object waveform.
Summary of the invention
The embodiment of present disclosure provides a kind of fuel injection control system, its can pinpoint accuracy the ground calculating object maximum injection rate of spraying, it is thousand meaning one second and the injection events subsequently during multi-injection that this object sprays.
Present disclosure is a kind of device spraying for controlling fuel that is applied to fuel injection system, described fuel injection system comprises Fuelinjection nozzle and fuel pressure sensor, the spouse of institute Fuelinjection nozzle is from, nozzle ejection by the fuel burning internal-combustion engine, and described fuel pressure sensor detects the fuel pressure in extending to the fuel feed lines of described nozzle.Described device can be controlled fuel and spray to carry out multi-injection, and wherein, fuel is repeatedly injected during the single burn cycle of described internal-combustion engine, and described multi-injection comprises that in check object sprays and the previous injection before described object sprays.
Described device comprises: acquisition module, and it is for obtaining multi-injection waveform, and described multi-injection waveform means the pressure waveform of the variation of the fuel pawl power being detected by described fuel pressure sensor when just carrying out described multi-injection; Memory module, it is for memory model curve (Wm), and described model curve does not carry out the model of described object determined described pressure waveform while spraying as carry out described previous injection during described multi-injection; Extraction module, it is used as object waveform (Wt) for deducting described model curve from described multi-injection waveform and extracting because described object sprays the pressure waveform causing; The first computing module, its for based at described object waveform the fuel pressure during in the injection of not carrying out by Fuelinjection nozzle carry out computing reference pressure (Pbase); And second computing module, it is for calculating based on the second parameter (Δ Pdif) with in first parameter (Δ P γ and Δ P) of described object waveform the maximum injection rate (Rmax) that described object sprays, the degree that described the first Parametric Representation fuel pressure reduces from described reference pressure in response to the described object just carrying out sprays, described the second parameter is reflected in the fuel pressure of the described model curve while just carrying out described object injection.
According to above-mentioned configuration, when being carried out fuel injection by Fuelinjection nozzle, fuel pressure sensor detects the fuel pressure in extending to the fuel feed lines of nozzle.When carrying out multi-injection, obtain the pressure waveform that the fuel pressure that represents to be detected by fuel pressure sensor changes, be used as the waveform that multi-injection detects.
Memory module memory model curve, this model curve is as in the situation that during multi-injection any one second and injection events are subsequently that object sprays, and do not carry out the model of the pressure waveform of object while spraying when carrying out the injection events before object Suo penetrates.The waveform that this model curve detects from multi-injection subsequently, deduct.Therefore, because spraying the pressure waveform causing, object is extracted as object waveform.In addition, the fuel pressure when the injection of not carrying out by Fuelinjection nozzle based in object waveform is carried out computing reference pressure.
The maximum injection rate of coming calculating object to spray based on the first parameter and the second parameter, the degree that the fuel pressure of described the first Parametric Representation in described object waveform reduces from reference pressure in response to the object just carrying out sprays, described the second parameter is reflected in the fuel pressure of the described model curve while just carrying out described object injection.This first, the maximum injection rate that the first parameter is sprayed to object is strong relevant.In addition, the second parameter has reflected that the model curve that is separated with object waveform on the poor impact of maximum injection rate therefore, except strong the first relevant parameter of maximum injection rate that fourth is sprayed to object, also based on having reflected that model curve calculates maximum injection rate to the second parameter of the impact of maximum injection rate.Therefore. when carrying out the maximum injection rate of calculating object injection based on object waveform, can calculate maximum injection rate in pinpoint accuracy ground.
In addition, present disclosure is a kind of device spraying for controlling fuel that is applied to fuel injection system, described fuel injection system comprises Fuelinjection nozzle and fuel pressure sensor, described Fuelinjection nozzle is from nozzle ejection by the fuel burning internal-combustion engine, and fuel pressure sensor detects the fuel pressure in extending to the fuel feed lines of described nozzle.Described device can be controlled fuel and spray to carry out multi-injection, and wherein, fuel is repeatedly injected during the single burn cycle of described internal-combustion engine, and described multi-injection comprises that in check object sprays and the previous injection before described object sprays.
Described device comprises: acquisition module, and it is for obtaining multi-injection waveform, and described multi-injection waveform means the pressure waveform of the variation of the fuel pressure being detected by described fuel pressure sensor when just carrying out described multi-injection; Memory module, it is for memory model curve (Wm), and described model curve does not carry out the model of described object determined described pressure waveform while spraying as carry out described previous injection during described multi-injection; Extraction module, it is used as object waveform (Wt) for deducting described model curve from described multi-injection waveform and extracting because described object sprays the pressure waveform causing; Computing module, it is for calculating based on the first parameter (Pi and Pc) and the second parameter (Δ Pdif) maximum injection rate that described object sprays, described the first parameter is the fuel pressure when not carrying out the injection of described Fuelinjection nozzle in described multi-injection waveform, and described the second parameter is reflected in the fuel pressure of the described model curve while just carrying out described object injection.
According to above-mentioned configuration, the maximum injection rate of coming calculating object to spray based on the first parameter and the second parameter, this first parameter is the fuel pressure when not carrying out the injection of described Fuelinjection nozzle in the waveform detecting at multi-injection, and described the second parameter has reflected the fuel pressure of the described model curve when carrying out described object injection.Here, the maximum injection rate that the first parameter is sprayed to object is strong relevant.In addition, the second parameter has reflected the impact on maximum injection rate of the model curve that is separated with object waveform.Therefore,, except the strong first relevant parameter of maximum injection rate of spraying to object, also based on reflection model curve, the second parameter of the impact of maximum injection rate is calculated to maximum injection rate.Therefore, can pinpoint accuracy the ground calculating object maximum injection rate of spraying.
Accompanying drawing explanation
In the accompanying drawings:
Fig. 1 is total schematic diagram of the fuel injection system of application fuel injection control system;
Fig. 2 A, 2B is the sequential chart that shows that the little Spraying rate corresponding with spraying command signal and fuel pressure change with 2C;
Fig. 3 is the block diagram of function in the middle of the function that provides at the ECU by Fig. 1 of explanation (for example, be Fuelinjection nozzle set spray command signal);
Fig. 4 is for calculating the flow chart of the processing operation of Spraying rate parameter;
Fig. 5 A, 5B and 5C are the sequential charts that injected fuel pressure waveform, non-injected fuel pressure waveform is shown and sprays waveform;
Fig. 6 is illustrated in the injection interval of the injection from previous injection events to object and the view of the relation actual ejection amount;
Fig. 7 A, 7B and 7C illustrate actual ejection rate, the waveform of multi-injection detection and the sequential chart of object waveform;
Fig. 8 A, 8B and 8C illustrate the waveform that sprays command signal, multi-injection detection, and the sequential chart of object waveform; And
Fig. 9 A, 9B and 9C are the sequential chart that the modified example of model pressure difference is shown.
Embodiment
The embodiment who specifies fuel injection control system is below described with reference to the accompanying drawings.According to the fuel injection control system of the present embodiment, be installed in the motor (internal-combustion engine) of vehicle.Suppose that motor is the diesel engine that fuel under high pressure is ejected into a plurality of cylinder # 1 in #4 and carrys out combustion fuel by ignition by compression.
Fig. 1 be illustrate that Fuelinjection nozzle 10, fuel pressure sensor carry 20, the schematic diagram of electronic control unit (ECU) 30 etc.Fuelinjection nozzle 10 is arranged on each cylinder # 1 of motor in #4.Fuel pressure sensor 20 is arranged in each Fuelinjection nozzle 10.ECU30 is arranged in vehicle.
First, the fuel injection system that description is comprised to the motor of Fuelinjection nozzle 10.Fuel in fuel tank 40 is pumped into common rail 42 (accumulator) and is accumulated by petrolift 41.Fuel is divided and is fed to the Fuelinjection nozzle 10 (#1 is to #4) of each cylinder subsequently.A plurality of Fuelinjection nozzles 10 (#1 is to #4) carry out fuel injection in succession with predefined order.
Plunger pump is as petrolift 41.Therefore,, by synchronously pumping of the to-and-fro motion of fuel and plunger, the motor of usining output carrys out driving fuel pump 41 as driving source by bent axle.Therefore, during single burn cycle by fuel from petrolift 41 pumpings the number of times of setting.
The back pressure chamber 11c that back pressure is applied to valve member 12 is formed in main body 11.High pressure path 11a and low pressure path 11d are connected to back pressure chamber 11c.Connected state between high pressure path 11, low pressure path 11d and back pressure chamber 11c is switched by control valve 14.When the actuator 13 such as electromagnetic coil or piezoelectric element is energized and control valve 14 for example, during by operation (, pressing downwards in Fig. 1), back pressure chamber 11 is communicated with low pressure path 11d.Thereby the fuel pressure in back pressure chamber 11c reduces.Therefore, reduced to be applied to the back pressure of valve member 12, and valve member 12 has upwards been promoted to (valve open operation).The plate shape surface 12a of valve member 12 moves away from the plate shape surface 11e of main body 11 subsequently, and from nozzle 11b burner oil.
On the other hand, when shutoff operates in the upward direction in Fig. 1 to the energising of actuator 13 and by control valve 14, back pressure chamber 11c is communicated with high pressure path 11a.Thereby the fuel pressure in back pressure chamber 11c increases.Therefore, the back pressure that is applied to valve member 12 increases, and valve member 12 is fallen to (valve closing operation).The plate shape surface 12a of valve member 12 contacts with the plate shape surface 11e of main body 11 subsequently, and stops from the fuel of nozzle 11b injection.
Therefore, the opening and closing of valve member 12 operation is controlled by the ECU30 that controls the energising of actuator 13.Therefore,, according to the opening and closing operation of valve member 12, the fuel under high pressure that is fed to high pressure path 11a from common rail 42 is ejected from nozzle 11b.
ECU30 calculates target spray regime (for example, the quantity of injection, the injection beginning moment, the finish time of injection and emitted dose) based on the operated amount of gas pedal, engine load, engine speed NE etc.For example, the best spray regime corresponding to engine load and engine speed is stored as to spray regime figure.Engine load based on current and engine speed, ECU30 calculates target spray regime with reference to spray regime figure.Subsequently, ECU30 sets injection command signal t1, t2, the Tq (referring to Fig. 2) corresponding with the target spray regime calculating based on Spraying rate parametric t d, te, R α, R β and Rmax of below describing in detail.ECU30 outputs to Fuelinjection nozzle 10 by injection command signal t1, t2, Tq, thereby controls the operation of Fuelinjection nozzle 10.ECU30 (memory module) stores the model curve as the model of pressure waveform therein.Pressure waveform is in the situation that the arbitrary second during multi-injection and injection events are subsequently that object sprays, the pressure waveform while not carrying out object injection carrying out the injection events (that is, previous injection events) before object sprays.Should be noted, multi-injection is defined as to fuel injection event in the every single burn cycle of internal-combustion engine and is performed repeatedly.This model curve is expressed by mathematical formulae, and is stored.
Next, with reference to Fig. 2 A, 2B and 2C, to Fig. 5 A, 5B and 5C, describe for controlling the ejection control method from the fuel injection of Fuelinjection nozzle 10.
Checkout value based on fuel pressure sensor 20 detects and represents that the fuel pressure occur in response to injection is with respect to the pressure waveform (seeing Fig. 2 C) of the variation of time.Pressure waveform based on detected, calculates and represents that Spraying rate is with respect to the Spraying rate waveform (seeing Fig. 2 B) of the variation of time.Spraying rate parameters R α, R β and the Rmax of the Spraying rate waveform (spray regime) that subsequently, study identification is calculated.In addition, Spraying rate parametric t d and the te of the coherence between identification injection command signal (pulse ON is t1 and pulse ON time period Tq constantly) and spray regime are learnt.
Specifically, calculate the near linear L α declining.The near linear L α of this decline is falling waveform in pressure waveform, be approximately straight line by method of least squares etc. from flex point P1 to flex point P2.At flex point P1, fuel pressure starts in response to the beginning of spraying to reduce.At flex point P2, the reduction of fuel pressure stops.Moment when subsequently, the fuel pressure of calculating on decline near linear L α becomes reference value B α (the intersection point moment LB α that L α and B α are crossing).Be conceived to intersection point LB α and the injection beginning strong correlation between R1 constantly constantly, based on intersection point moment LB α, calculate injection beginning R1 constantly.For example, can calculate the moment of the scheduled delay C α before intersection point moment LB α, as injection beginning moment R1.
In addition, calculate the near linear L β rising.The near linear L β rising for being approximately the rising waveform of straight line in pressure waveform, from flex point P3 to flex point P5 by method of least squares etc.At flex point P3, fuel pressure starts in response to the end of spraying to increase.At flex point P5, the increase of fuel pressure stops subsequently, calculates the moment when fuel pressure becomes reference value B β (the intersection point moment LB β that L β and B β are crossing) on the near linear L β rising.Be conceived to intersection point moment LB β and spray the strong correlation between the R4 finish time, based on intersection point moment LB β, calculating and spray the R4 finish time.For example, can calculate the moment of the scheduled delay C β before intersection point moment LB β, as spraying knot speed R4 constantly.
Next, be conceived to the strong correlation declining between the gradient of near linear L α and the gradient of Spraying rate increase, the gradient based on decline near linear L α comes computational chart to be shown in the gradient of the straight line R α of the Spraying rate increase in the Spraying rate waveform shown in Fig. 2 B.For example, can be multiplied by by the gradient of L α the gradient that pre-determined factor is calculated R α.In a similar manner, because the gradient that the gradient of rising near linear L β and Spraying rate reduce is strong correlation, the gradient based on rising near linear L β comes computational chart to be shown in the gradient of the straight line R β that the Spraying rate in Spraying rate waveform reduces.
Next, the straight line R α based in Spraying rate waveform and R β, calculate valve member 12 and start the moment (the valve closing operation R23 zero hour) of decline in response to the order of end injection.Specifically, the intersection point between calculated line R α and R β, and calculate this intersection point and be constantly used as the valve closing operation R23 zero hour.In addition, calculate injection beginning moment R1 with respect to the retard time (injection beginning td retard time) of injection beginning order moment t1.And, calculate the valve closing operation R23 zero hour with respect to the retard time of spraying the finish command moment t2 (spray and finish te retard time).
In addition the pressure calculating corresponding to the intersection point between decline near linear L α and rising near linear L β, is used as intersection point pressure P α β.The reference pressure Pbase that calculating is below described in detail and the pressure difference Δ P γ between intersection point pressure P α β.Pressure difference Δ P γ (the first parameter) has represented the degree that fuel pressure declines from reference pressure Pbase in response to the object being performed sprays in pressure waveform (object waveform).Be conceived to the strong correlation between pressure difference Δ P γ and maximum injection rate Rmax, based on pressure difference Δ P γ, calculate maximum injection rate Rmax.Specifically, by pressure difference Δ P γ, be multiplied by correlation coefficient C γ and calculate maximum injection rate Rmax.Pressure difference Δ P γ is larger, and the maximum injection rate Rmax calculating is just larger.Yet, when carrying out little injection when (wherein pressure difference Δ P γ is less than preset value delta P γ th), as mentioned above, Rmax=Δ P γ * C γ.On the other hand, when spraying greatly (wherein Δ P γ >=Δ P γ th), calculate based on fuel pressure and predefined value (setting value R γ) is used as maximum injection rate Rmax.
Here, above-mentioned " little injection " is assumed to valve member 12 and before Spraying rate reaches R γ, starts the injection events declining.At this moment, the fuel of the high pressure path 11a of the Fuelinjection nozzle 10 of flowing through is by plate shape surface 11e and 12a throttling, thus decision maximum injection rate Rmax.On the other hand, above-mentioned " spraying greatly " is assumed to valve member 12 and after Spraying rate reaches R γ, starts the injection events declining.At this moment, the fuel of the high pressure path 11a that flows through is by nozzle 11b throttling, thus decision maximum injection rate Rmax (setting value R γ).In other words, even when spraying order phase Tq long enough and when reaching the large injection that valve opening state also continues after setting value R γ, Spraying rate waveform forms trapezoidal (seeing the solid line of Fig. 2 B).On the other hand, when carrying out the little injection that valve closing operation just started before setting value R γ reaches, Spraying rate waveform forms triangle (seeing the dotted line of Fig. 2 B).
Due to above reason, can calculate Spraying rate parametric t d, te, R α, R β and Rmax according to pressure waveform.Value based on study has been considered Spraying rate parametric t d, te, R α, R β and Rmax over time, can calculate corresponding to the Spraying rate waveform (seeing Fig. 2 B) that sprays command signal (seeing Fig. 2 A).As the area of the Spraying rate waveform of above-mentioned calculating (shaded area of Fig. 2 B) equals emitted dose.Therefore, also can calculate emitted dose based on Spraying rate parameter.For example, can calculate (study) in calculated emitted dose and spray the relation between order time period Tq, being used as Spraying rate parameter.
Fig. 3 for study Spraying rate parameter, set the general frame of the injection command signal etc. that outputs to Fuelinjection nozzle 10.The part 31,32,33 and 34 of being carried out by ECU30 is described hereinafter with reference to Fig. 3.The pressure waveform of Spraying rate calculation of parameter portion 31 based on being detected by fuel pressure sensor 20 calculates Spraying rate parametric t d as above, te, R α, R β and Rmax.
By carrying out interpolation to being stored in Spraying rate Parameter Map M1 to the learning value of the Spraying rate parameter in M5, interpolating portion 33 is calculated and current emitted dose and the corresponding Spraying rate parameter of fuel pressure of needing.
The Spraying rate parameter of configuration part 34 based on being calculated by interpolating portion 33, sets the injection command signal (injection beginning order is t1 and injection order time period Tq constantly) corresponding to target spray regime (emitted dose needing and the injection beginning moment needing).Subsequently, fuel pressure sensor 20 detects the pressure waveform that has when the injection command signal of observing setting as above is carried out operating fuel injected valve 10 pressure waveform based on detecting, and Spraying rate parametric t d, tc, R α, R β and Rmax calculate in Spraying rate calculation of parameter portion 31.
In other words, the actual ejection state (in other words, Spraying rate parametric t d, te, R α, R β and Rmax) relevant to spraying command signal is detected and study.Based on learning value, set the injection command signal corresponding to target spray regime.Therefore, based on actual ejection state feedback control, spray command signal.Can control accurately fuel-injection condition, actual ejection state and target spray regime are matched.Especially, owing to carrying out feedback control, thereby set and spray order time period Tq based on Spraying rate parameter, make actual ejection quantitative change become target emitted dose, actual ejection amount can with mark emitted dose day and match.
Next, with reference to the flow chart of Fig. 4, describe for the pressure waveform by from detected (seeing Fig. 2 C) and calculate the processing operation that Spraying rate parametric t d, te, R α, R β and Rmax (seeing Fig. 2 B) carry out analysis spraying state.Processing shown in Fig. 4 is repeated by the microcomputer being included in ECU30.
First, at step S10, the checkout value of ECU30 based on fuel pressure sensor 20 calculates injection waveform Wb hereinafter described.In the following description, the cylinder that execution fuel sprays is called as injection cylinder.During fuel injection enters injection cylinder, stop spraying the cylinder entering and be called non-injection cylinder.In addition the fuel pressure sensor 20 being arranged in the Fuelinjection nozzle 10 that sprays cylinder, is called as eject sensor.The fuel pressure sensor 20 being arranged in the Fuelinjection nozzle 10 of non-injection cylinder is called as non-eject sensor.
In step S10, ECU30 obtains a plurality of checkout values that detected at predetermined sampling period place by eject sensor.ECU30 produces and is illustrated in eject sensor in response to the fuel pressure waveform Wa (seeing Fig. 5 A) that sprays the fuel pressure variation occurring based on checkout value subsequently.Next, ECU30 obtains a plurality of checkout values that detected by non-eject sensor at predetermined sampling period place, and produces and be illustrated in non-eject sensor in response to the fuel pressure waveform Wu (referring to Fig. 5 B) that sprays the variation of the fuel pressure occurring based on checkout value.
When fuel is pumped into moment of common rail 42 when overlapping with time for spraying from petrolift 41, fuel pressure waveform Wu becomes the high waveform of total pressure as shown in the solid line in Fig. 5 B.On the other hand, after following fuel injection closely, when fuel does not carry out suchlike pumping between injection period, the decrease of the fuel pressure in whole ejecting system equals emitted dose.Therefore, fuel pressure waveform Wu ' becomes the low waveform of total pressure as shown in the dotted line of Fig. 5 B.
The component of fuel pressure waveform Wu and Wu ' is also included in fuel pressure waveform Wa.In other words, fuel pressure waveform Wa comprises that expression is by spraying the injection waveform Wb (referring to Fig. 5 C) of caused fuel pressure variation and the component of fuel pressure waveform Wu and Wu '.Therefore,, in step 10, by deducting the fuel pressure waveform Wu of non-injection cylinder and Wu ' (Wb=Wa-Wu) from spray the fuel pressure waveform Wa of cylinder, processes operation to extract injection waveform Wb.
Next, in the step S11 of Fig. 4, ECU30 carries out pressure wave (fluctuation) Transformatin hereinafter described.In other words, when carrying out multi-injection, the pressure wave component Wc (seeing Fig. 2 C) previously having sprayed (it is the pulsation of the pressure waveform of maintenance after previous injection events finishes) is overlapping with fuel pressure waveform Wa.Especially, more in short-term, the fuel pressure waveform Wa that object sprays is subject to the remarkable impact of the pressure wave component Wc that previously sprayed to the interval between previous injection events and object spray.Therefore, in step S11, ECU30 carries out pressure wave (fluctuation) Transformatin, deducts the pressure wave component Wc of previous injection from spray waveform Wb.Can infer from the spray regime of previous injection events the pressure wave component Wc (model curve) of previous injection.
In step S12 subsequently, based on reference waveform (its in carrying out the injection waveform Wb (object waveform) of above-mentioned pressure wave Transformatin with until the waveform of corresponding part of time period that fuel pressure starts to reduce in response to the beginning of spraying), the average fuel pressure of ECU30 computing reference waveform is used as reference pressure Pbase.For example, ECU30 can by with from injection beginning order constantly t1 until through predetermined time amount the corresponding part of time period TA be set as reference waveform.Alternatively, ECU30 can calculate flex point P1 by the derivative based on falling waveform, and a part that equals the time period from injection beginning order moment t1 to the scheduled time amount before flex point P1 is set as to reference waveform.In other words, reference waveform is the pressure waveform in the time period of not sprayed by Fuelinjection nozzle 10 in carrying out the injection waveform Wb of pressure wave Transformatin.More specifically, reference waveform is the pressure waveform following closely before previous injection events carrying out.
In step S13 subsequently, based on falling waveform (it is the waveform of a corresponding part of the time period reducing in response to the increase of Spraying rate with fuel pressure in spraying waveform Wb), ECU30 calculates the near linear L α of falling waveform.For example, ECU30 can by with from the corresponding part of a predetermined amount of time TB who lights, be set as falling waveform, in this point, from injection beginning order constantly t1 through predetermined time amount.Alternatively, ECU30 can calculate flex point P1 and P2 by the derivative based on falling waveform, and by and flex point P1 and P2 between the part of waveform equivalence be set as falling waveform ECU30 and can according to a plurality of fuel pressure checkout values (sampled value) that form this falling waveform, calculate near linear L α by method of least squares subsequently.Alternatively, ECU30 can calculate tangent line at the some place of falling waveform interior derivative minimum, is used as near linear L α.
In step S14 subsequently, based on rising waveform (it is the waveform of a corresponding part of the time period that reduces to increase in response to Spraying rate with fuel pressure in spraying waveform Wb), ECU30 calculates the near linear L β of this rising waveform.For example, ECU30 can by with from the corresponding part of a predetermined amount of time TC who lights, be set as rising waveform, in this point, from spray the finish command constantly t2 through predetermined time amount.Alternatively, ECU30 can calculate flex point P3 and P5 by the derivative based on rising waveform, and by and flex point P3 and P5 between the part of waveform equivalence be set as rising waveform.ECU30 can calculate near linear L β according to a plurality of fuel pressure checkout values (sampled value) that form this rising waveform by method of least squares subsequently.Alternatively, ECU30 can calculate tangent line at the some place of rising waveform interior derivative maximum, is used as near linear L β.
In step S15 subsequently, ECU30 comes computing reference value B α and B β based on reference pressure Pbase.For example, ECU30 can calculate the value that is less than reference pressure Pbase by prearranging quatity, is used as reference value B α and B β.Reference value B α and B β do not need to be set to identical value.In addition, can be according to reference pressure Pbase, the value of fuel temperature etc. changes sets this prearranging quatity.
In step S16 subsequently, ECU30 calculates the moment (intersection point between L α and B α is LB α constantly) that becomes the reference value B α near linear L α in fuel pressure.Be conceived to intersection point LB α and the injection beginning strong correlation between R1 constantly constantly, ECU30 calculates injection beginning R1 constantly based on intersection point moment LB α.For example, ECU30 can calculate intersection point constantly before LB α predetermined retard time C α the moment, be used as injection beginning R1 constantly.
In step S17 subsequently, ECU30 calculates the moment (intersection point between L β and B β is LB β constantly) that becomes the reference value B β near linear L β in fuel pressure.Be conceived to intersection point moment LB β and spray the strong correlation between the R4 finish time, ECU30 calculates injection beginning R4 constantly based on intersection point moment LB β.For example, ECU30 can calculate intersection point constantly before LB β predetermined retard time C β the moment, be used as injection beginning R4 constantly.Can change setting C α retard time and C β according to the value of reference pressure Pbase, fuel temperature etc.
In step S18 subsequently, be conceived to the strong correlation between the gradient of near linear L α and the gradient of Spraying rate increase, the gradient of ECU30 based near linear L α calculates the gradient of the straight line R α that represents that in the Spraying rate waveform shown in Fig. 2 B Spraying rate increases.For example, ECU30 can be by making the gradient of L α be multiplied by the gradient that predetermined coefficient calculates R α.Injection beginning that can be based on calculating at step S16 constantly R1 and the gradient of the R α calculating at step S18 is identified the straight line R α of the rising part that represents the Spraying rate waveform relevant with injection command signal.
In addition, in step S18, be conceived to the strong correlation between the gradient of near linear L β and gradient that Spraying rate reduces, the gradient of ECU30 based near linear L β calculates the gradient of the straight line R β that represents that in Spraying rate waveform Spraying rate reduces.For example, ECU30 can be by making the gradient of L β be multiplied by the gradient that predetermined coefficient calculates R β.The injection R4 finish time that can be based on calculating at step S17 and the gradient of the R β calculating at step S18 are identified the straight line R β of the sloping portion that represents the Spraying rate waveform relevant with injection command signal.Can change setting pre-determined factor according to the value of reference pressure Pbase, fuel temperature etc.
In step S19 subsequently, the straight line R α in the Spraying rate waveform based on calculating at step S18 and R β, ECU30 calculates valve member 12 and in response to the order of end injection, starts the moment (the valve closing operation R23 zero hour) declining.Particularly, the intersection point between ECU30 calculated line R α and R β moment of calculating this intersection point are used as valve closing operation R23 zero hour time.
In step S20 subsequently, the injection beginning moment R1 that ECU30 calculating is calculated in step 16 is with respect to the retard time (injection beginning td retard time) of injection beginning order moment t1.In addition the valve closing operation R23 zero hour that, ECU20 calculating is calculated at step S19 is with respect to the retard time (spray and finish te retard time) of spraying the finish command moment t2.Spray to finish retard time te and refer to the moment t2 of order from providing end injection until start retard time in the moment of the operation of control valve 14.Change alive saying, the variation that retard time, td and te meaned Spraying rate is with respect to the parameter of spraying the operating lag of command signal.In addition, can provide from injection beginning order constantly t1 to retard time of maximum injection rate due in R2, from spray the finish command constantly t2 to Spraying rate decline the R3 zero hour retard time, from spray the finish command constantly t2 to retard time etc. of spraying the R4 finish time.
In step S21 subsequently, ECU30 judges whether the pressure difference Δ P γ (the first parameter) between reference pressure Pbase and intersection point pressure is less than preset value delta P γ th.When judging Δ P γ < Δ P γ th ("Yes" in step 21), in step S22 subsequently, ECU30 proofreaies and correct pressure difference Δ P γ, to consider the impact of above-mentioned model curve on maximum injection rate Rmax.This processing operation below will be described.In the case, ECU30 is considered as little injection by this injection.In step S23 subsequently, the pressure difference Δ P γ (Rmax=Δ P γ * C γ) of ECU30 based on proofreading and correct calculates maximum injection rate Rmax.
On the other hand, when judging Δ P γ > Δ P γ th ("No" in step S21), in step S24 subsequently, based on being fed to the fuel pressure of Fuelinjection nozzle 10, predefined value (setting value R γ) is used as maximum injection rate Rmax in ECU30 calculating.For the pressure (the first parameter) that is fed to the fuel of Fuelinjection nozzle 10, the fuel pressure Pi when can use the fuel pressure PC in common rail 42 or not carrying out the injection of Fuelinjection nozzle 10 in spraying waveform Wb.The first parameter is larger, and the maximum injection rate Rmax calculating is just larger.In the case, ECU30 is considered as large injection by injection.In step S25 subsequently, ECU30 proofreaies and correct maximum injection rate (setting value R γ), to consider the impact of above-mentioned model curve on maximum injection rate Rmax.This processing operation below will be described.
ECU30 temporarily finishes a series of processing operation (end) subsequently.Processing operation at step S10 is equivalent to the processing operation as acquisition module.Processing operation at step S11 is equivalent to the processing operation as extraction module.Processing operation at step S12 is equivalent to the processing operation as the first computing module.In the processing operation of step S22 and step S23 and in the processing operation of step S24 and step S25, be all equivalent to the processing operation as the second computing module.
Fig. 6 is illustrated in not carry out in the situation that the injection interval that the processing operation in the step S22 of Fig. 4 and step S25 is sprayed from previous injection events to object and the view of the relation actual ejection amount.Here, the engine load based on identical and engine speed (engine behavior) are calculated target spray regime (desired value that comprises emitted dose).Based on above-mentioned Spraying rate parametric t d, te, R α, Rp and Rmax, set injection command signal t1, t2 and the Tq corresponding to calculated target spray regime, and control the operation of Fuelinjection nozzle 10.Do not carry out actual ejection amount with respect to the feedback control of emitted dose desired value.
As shown in Figure 6, actual ejection amount periodically changes according to injection interval.Between the desired value of emitted dose and actual ejection amount, there is deviation.Especially, as shown in annulus chain type line, when injection interval very in short-term, the deviation between desired value and actual ejection amount will increase.
Next, by describing this deviation, occur in the reason between desired value and actual ejection amount.Fig. 7 A to 7C is sequential chart, and wherein, Fig. 7 A shows actual ejection rate, and Fig. 7 B shows the waveform that multi-injection detects, and Fig. 7 C shows object waveform.Here, only changed the injection interval spraying from previous injection events to object, and carried out little injection.Show the result of the actual measurement of Spraying rate.By the caused pressure pulsation of previous injection events (model curve Wm) deducting, obtain object waveform Wt from multi-injection detection waveform.Fig. 7 A to the reference character in 7C corresponding to Fig. 2 Δ to the reference character in 2B.Subscript " 1 " is added to has the injection events (by the represented waveform of solid line) of short injection interval.Subscript " 2 " is added to the capable injection events (by the represented waveform of dotted line) of long injection interval of tool.
As shown in Fig. 7 A and 7B, between the waveform detecting at actual ejection rate waveform and multi-injection, the variation of maximum injection rate Rmax (Rmax1 is to Rmax2) and pressure difference Δ P) variation of γ (Δ P γ 1 to Δ P γ 2) is correlated with.On the other hand, as shown in Fig. 7 A and 7C, between actual ejection rate waveform and object waveform Wt, the variation of the variation of maximum injection rate Rmax (Rmax1 is to Rmax2) and pressure difference Δ P γ (Δ P γ 1 to Δ P γ 2) is incoherent.Therefore,, when calculating maximum injection rate Rmax based on object waveform Wt, there is the deviation with actual maximum injection rate Rmax.
This is because although because differing from of the injection interval shown in Fig. 7 B causes the fuel pressure when injection beginning (flex point P1) different, yet fuel pressure while having eliminated at injection beginning in the object waveform Wt as shown in Fig. 7 C is poor.In other words, in object waveform Wt, because the fuel pressure of reference model curve Wm when injection beginning calculated intersection point pressure P α β, therefore even if when the fuel pressure of model curve Wm during at injection beginning changes according to injection interval, this change also can't be reflected in the calculating of maximum injection rate Rmax.Yet as shown in Fig. 7 A and 7B, because actual Spraying rate is subject to fuel pressure when injection beginning and the impact of the fuel pressure between injection period, the maximum injection rate Rmax and the actual maximum injection rate Rmax that calculate based on object waveform Wt deviate.
In addition, when spraying equally greatly, because actual ejection rate is subject to fuel pressure when injection beginning and the impact of the fuel pressure between injection period, when calculating maximum injection rate Rmax, need to consider fuel pressure when injection beginning and the fuel pressure between injection period.
Here, according to the present embodiment, in order to proofread and correct the deviation of all so maximum injection rate Rmax, in the step S22 of Fig. 4 and step S23 and step S24 and step S25, carry out following processing operation.Fig. 8 A to 8C is sequential chart, and wherein, Fig. 8 A represents to drive to spray to be ordered, and Fig. 8 B represents the waveform that multi-injection detects, and Fig. 8 C has represented object waveform.
In step S22, ECU30, based on when carrying out reflecting when object sprays the model pressure difference Δ Pdif (the second parameter) of the fuel pressure of model curve Wm, proofreaies and correct the pressure difference Δ P γ (the first parameter) in object waveform Wt.Specifically, model pressure difference Δ Pdif be object in model curve Wm spray the zero hour t11 fuel pressure P11 and poor between the fuel pressure P12 of moment t12 of model curve Wm, at moment t12 place (or moment corresponding with intersection point pressure P α β), the fuel pressure strength of object waveform Wt becomes minimum in response to the object being performed sprays.The product that ECU30 is multiplied by correction factor Km1 by model pressure difference Δ Pdif adds to pressure difference Δ P γ, and summation is set as to the poor Δ P of calibrating (base measuring) pressure γ.Correction factor Km1 can be fixed value.Alternatively, the fuel pressure Pi according to the fuel pressure PC in common rail 42 or while not carrying out the injection (before following previous injection events closely) of Fuelinjection nozzle 10 in the waveform multi-injection detects, correction factor Kml can be for variable.Subsequently, in step S23, the pressure difference Δ P γ of ECU30 based on proofreading and correct calculates maximum injection rate Rmax (Rmax=Δ P γ * C γ).
In addition, as mentioned above, in step S24, based on being fed to the fuel pressure (the first parameter) of Fuelinjection nozzle 10, predefined value (setting value R γ) is used as maximum injection rate Rmax in ECU30 calculating.Subsequently, in step S25, ECU30, based on model pressure difference Δ Pdif (the second parameter), proofreaies and correct maximum injection rate Rmax (setting value R γ).Specifically, the product that ECU30 is multiplied by correction factor Km2 by model pressure difference Δ Pdif adds to maximum injection rate Rmax, and summation is set as to the maximum injection rate Rmax of correction.Alternatively, ECU30 is multiplied by pressure difference Δ P γ and the summation of model pressure difference Δ Pdif (Δ P γ R) and the ratio (or this ratio is multiplied by the product of correction factor Km2) of pressure difference Δ P γ by maximum injection rate Rmax, and this product is set as to the maximum injection rate Rmax of correction.Correction factor Km2 can be fixed value.Alternatively, the fuel pressure Pi according to the fuel pressure PC in common rail 42 or while not carrying out the injection (before following previous injection events closely) of Fuelinjection nozzle 10 in the waveform multi-injection detects, correction factor Km2 can be variable.
The present embodiment described above in detail has the following advantages.
When carrying out little injection, the model pressure difference Δ Pdif (the second parameter) of the intersection point pressure P α β (the first parameter) of the degree that the fuel pressure based on being illustrated in object waveform declines from reference pressure Pbase in response to the object just carrying out sprays and the reflection fuel pressure among model curve Wm when just carrying out object injection, the maximum injection rate Rmax that comes calculating object to spray.Here, the maximum injection rate Rmax that intersection point pressure P α β and object spray has strong correlation.In addition, this model pressure difference Δ Pdif has reflected the model curve Wm that is separated with the object waveform Wt impact on maximum injection rate Rmax.Therefore,, except having the intersection point pressure P α β of strong correlation with the maximum injection rate Rmax of object injection, also the model pressure difference Δ Pdif on the impact of maximum injection rate Rmax based on reflection model curve Wm, calculates maximum injection rate Rmax.Therefore,, when carrying out the maximum injection rate Ranax of calculating object injection based on object waveform Wt, can calculate accurately maximum injection rate Rmax.
When spraying greatly, based on when not carrying out the fuel pressure Pi (the first parameter) of the injection of Fuelinjection nozzle 10 and reflection when just carrying out object model pressure difference Δ Pdif (the second parameter) in the fuel pressure of model curve Wm while spraying, the maximum injection rate Rmax (setting value R γ) that comes calculating object to spray in multi-injection detection waveform.Here, the maximum injection rate Rmax that fuel pressure Pi and object spray has strong correlation.In addition, this model pressure difference Δ Pdif has reflected the model curve Wm that is separated with the object waveform Wt impact on maximum injection rate Rmax.Therefore,, except having the fuel pressure Pi of strong correlation with the maximum injection rate Ranax of object injection, also the model pressure difference Δ Pdif on the impact of maximum injection rate Rmax based on reflection model curve Wm, calculates maximum injection rate Rmax.Therefore the maximum injection rate Rmax that, calculating object sprays accurately.
Model pressure difference Δ Pdif is the second parameter, its be object in model curve Wm spray the zero hour t11 fuel pressure P11 and poor between the fuel pressure P12 of moment t12 of model curve Wm, at moment t12 place (or moment corresponding with intersection point pressure P α β), the fuel pressure of object waveform Wt becomes minimum in response to the object just carrying out sprays.Therefore the maximum injection rate Rmax that, calculating object sprays more accurately.
The invention is not restricted to according to the description of the present embodiment and can revise as follows.In addition feature configuration that, can each embodiment of combination in any.
Can revise as follows the processing operation of the step S22 in Fig. 4 and step S23.In other words, in step S22, the pressure difference Δ P γ (first parameter) of ECU30 based on object waveform Wt calculates maximum injection rate Rmax.In step S23, ECU30 proofreaies and correct maximum injection rate Rmax based on model pressure difference Δ Pdif (the second parameter).Specifically, the mode that ECU30 can be similar with the step S24 with above-mentioned Fig. 4 is proofreaied and correct maximum injection rate Rmax.
Can revise as follows the processing operation of the step S24 in Fig. 4 and step S25.In other words, in step S24, the model pressure difference Δ Pdif (second parameter) of ECU30 based on being reflected in the fuel pressure of just carrying out the model curve Wm of object while spraying, proofreaies and correct the fuel pressure Pi (the first parameter) of the fuel that is fed to Fuelinjection nozzle 10.Specifically, the product that ECU30 is multiplied by correction factor Kml by model pressure difference Δ Pdif is increased to fuel pressure Pi, and summation is set as to the fuel pressure Pi of correction.Correction factor Km1 can be fixed value.Alternatively, according to the fuel pressure PC in common rail 42 or in the waveform that multi-injection detects the fuel pressure Pi when not carrying out the injection (before following previous injection events closely) of Fuelinjection nozzle 10, correction factor Kml is variable.Subsequently, in step S25, the fuel pressure Pi of ECU30 based on proofreading and correct calculates maximum injection rate Rmax.
If Fig. 9 A is to as shown in 9C, as model pressure difference Δ Pdif (the second parameter), can use that object in model curve Wm sprays the zero hour t11 fuel pressure P11 and in model curve Wm, do not carrying out poor between the fuel pressure P13 of injection (before following previous injection events closely) of Fuelinjection nozzle 10.Model pressure difference Δ Pdif in such cases and the model pressure difference Δ Pdif shown in Fig. 8 differ an error pressure Δ Per.Yet trend is substantially similar.Due to this configuration, maximum injection rate Rmax that can calculating object sprays accurately by simple configuration.
If Fig. 2 A is to 2C and Fig. 7 A to as shown in 7C, as the first parameter, can use at reference pressure Pbase and the flex point P2 in object waveform Wt and the pressure difference Δ P between the fuel pressure of P23.This pressure difference Δ P has also represented the degree that the fuel pressure in object waveform Wt reduces from reference pressure Pbase in response to the object just carrying out sprays.
According to the above embodiments, fuel pressure sensor 20 is arranged in Fuelinjection nozzle 10.Yet fuel pressure sensor 20 only needs for being arranged to detect the fuel pressure sensor to the fuel pressure in the fuel feed lines of nozzle 11b at the exhaust port 42 from common rail 42.Therefore, fuel pressure sensor can be installed in and connect in the high pressure pipe line 42b that is total to rail 42 and Fuelinjection nozzle 10.In other words, connect common rail 42 and the high pressure pipe line 42b of Fuelinjection nozzle 10 and the high pressure path 11a in main body 11 and be equal to " fuel feed lines ".
Claims (9)
1. the device spraying for controlling fuel that is applied to fuel injection system, described fuel injection system comprises Fuelinjection nozzle and fuel pressure sensor, described Fuelinjection nozzle from nozzle ejection by the fuel burning internal-combustion engine, described fuel pressure sensor detects the fuel pressure in extending to the fuel feed lines of described nozzle, described device can be controlled fuel and spray to carry out multi-injection, wherein, fuel is repeatedly injected during the single burn cycle of described internal-combustion engine, described multi-injection comprises that in check object sprays and the previous injection before described object sprays, described device comprises:
Acquisition module, it is for obtaining multi-injection waveform, and described multi-injection waveform means the pressure waveform of the variation of the fuel pressure being detected by described fuel pressure sensor when carrying out described multi-injection;
Memory module.It is for memory model curve, and described model curve does not carry out the model of described object determined described pressure waveform while spraying as carry out described previous injection during described multi-injection;
Extraction module, it is for deducting described model curve from described multi-injection waveform, and extraction is used as object waveform because described object sprays the pressure waveform causing;
The first computing module, its for based at described object waveform the fuel pressure during injection at Fuelinjection nozzle described in not carrying out mountain carry out computing reference pressure; And
The second computing module, it is for calculating based on the second parameter with in the first parameter of described object waveform the maximum injection rate that described object sprays, the degree that described the first Parametric Representation fuel pressure reduces from described reference pressure in response to the described object just carrying out sprays, described the second parameter has reflected the fuel pressure of the described model curve when just carrying out described object injection.
2. device according to claim 1, wherein,
Described the first parameter is defined as the pressure difference between described reference pressure and droop line and the fuel pressure of riser intersection, described droop line is illustrated in the approximate of part that in described object waveform, fuel pressure reduces, and described riser is illustrated in the approximate of part that in described object waveform, fuel pressure increases.
3. device according to claim 2, wherein,
Described the second computing module is configured to calculate described maximum injection rate, makes described pressure difference larger, and described maximum injection rate is just higher.
4. the device spraying for controlling fuel that is applied to fuel injection system, described fuel injection system comprises Fuelinjection nozzle and fuel pressure sensor, described Fuelinjection nozzle from nozzle ejection by the fuel burning internal-combustion engine, described fuel pressure sensor detects the fuel pressure in extending to the fuel feed lines of described nozzle, described device can be controlled fuel and spray to carry out multi-injection, wherein, fuel is repeatedly injected during the single burn cycle of described internal-combustion engine, described multi-injection comprises that in check object sprays and the previous injection before described object sprays, described device comprises:
Acquisition module, it is for obtaining multi-injection waveform, and described multi-injection waveform means the pressure waveform of the variation of the fuel pawl power being detected by described fuel pressure sensor when carrying out described multi-injection;
Memory module, it is for memory model curve, and described model curve does not carry out the model of described object determined described pressure waveform while spraying as carry out described previous injection during described multi-injection;
Extraction module, it is for deducting described model curve from described multi-injection waveform, and extraction is used as object waveform because described object sprays the pressure waveform causing;
Computing module, it is for calculating based on the first parameter and the second parameter the maximum injection rate that described object sprays, described the first parameter is the fuel pressure when not carrying out the injection of described Fuelinjection nozzle in described multi-injection waveform, and described the second parameter has reflected the fuel pressure of the described model curve when just carrying out described object injection.
5. device according to claim 4, wherein,
Described computing module is configured to calculate described maximum injection rate, makes described the first parameter larger, and described maximum injection rate is just higher.
6. according to the device described in any one in claim 1 to 5, wherein,
Described the second parameter be defined in the fuel pressure of the zero hour that the described object in described model curve sprays and fuel pressure at described object waveform in response to the object just carrying out sprays spread out poor between the fuel pressure of described model curve in the minimum moment of change.
7. according to the device described in claim 1 or 4, wherein,
Described the second parameter be defined in the fuel pressure of the zero hour that the described object in described model curve sprays and in described model curve do not carrying out the injection by described Fuelinjection nozzle time fuel pressure between poor.
8. according to the device described in claim 1 or 3, wherein,
Described the second computing module is configured to calculate the described maximum injection rate that increases or reduce based on described the second parameter.
9. according to the device described in claim 4 or 5, wherein,
Listen and state computing module and be configured to calculate the described maximum injection rate that increases or reduce based on described the second parameter.
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| JP2012121007A JP5565435B2 (en) | 2012-05-28 | 2012-05-28 | Fuel injection control device |
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| CN113513422A (en) * | 2021-06-01 | 2021-10-19 | 潍柴动力股份有限公司 | Multi-injection fuel quantity compensation method and device, electronic control unit and storage medium |
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|---|---|---|---|---|
| JP6215718B2 (en) * | 2014-01-22 | 2017-10-18 | トヨタ自動車株式会社 | Fuel injection characteristic detection device |
| DE102014205686A1 (en) * | 2014-03-26 | 2015-10-01 | Mtu Friedrichshafen Gmbh | Method for operating an internal combustion engine, method for determining a learning structure for the operation of an internal combustion engine, control unit for an internal combustion engine and internal combustion engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2200698Y (en) * | 1994-05-16 | 1995-06-14 | 北内集团总公司 | Gasoline machine with mini-computer controlled fuel spurt and direct ignition for internal-combustion engine |
| CN1450258A (en) * | 2002-03-11 | 2003-10-22 | 三菱自动车工业株式会社 | Divided fuel injection control apparatus |
| JP2010003004A (en) * | 2008-06-18 | 2010-01-07 | Denso Corp | Learning device and fuel injection system |
| US20100250097A1 (en) * | 2009-03-25 | 2010-09-30 | Denso Corporation | Fuel injection detecting device |
| CN102287289A (en) * | 2010-06-18 | 2011-12-21 | 株式会社电装 | Fuel-pressure waveform detector |
-
2012
- 2012-05-28 JP JP2012121007A patent/JP5565435B2/en active Active
-
2013
- 2013-05-24 DE DE102013105355.6A patent/DE102013105355B4/en active Active
- 2013-05-28 CN CN201310296382.2A patent/CN103511106B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2200698Y (en) * | 1994-05-16 | 1995-06-14 | 北内集团总公司 | Gasoline machine with mini-computer controlled fuel spurt and direct ignition for internal-combustion engine |
| CN1450258A (en) * | 2002-03-11 | 2003-10-22 | 三菱自动车工业株式会社 | Divided fuel injection control apparatus |
| JP2010003004A (en) * | 2008-06-18 | 2010-01-07 | Denso Corp | Learning device and fuel injection system |
| US20100250097A1 (en) * | 2009-03-25 | 2010-09-30 | Denso Corporation | Fuel injection detecting device |
| JP2010223184A (en) * | 2009-03-25 | 2010-10-07 | Denso Corp | Fuel injection state detection device |
| CN102287289A (en) * | 2010-06-18 | 2011-12-21 | 株式会社电装 | Fuel-pressure waveform detector |
| JP2012002173A (en) * | 2010-06-18 | 2012-01-05 | Denso Corp | Fuel-pressure waveform obtaining device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513422A (en) * | 2021-06-01 | 2021-10-19 | 潍柴动力股份有限公司 | Multi-injection fuel quantity compensation method and device, electronic control unit and storage medium |
| CN113513422B (en) * | 2021-06-01 | 2022-09-23 | 潍柴动力股份有限公司 | Multi-injection fuel quantity compensation method and device, electronic control unit and storage medium |
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| JP2013245633A (en) | 2013-12-09 |
| DE102013105355B4 (en) | 2019-08-01 |
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| CN103511106B (en) | 2017-03-01 |
| JP5565435B2 (en) | 2014-08-06 |
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