CN104975972B - System and method for improving fuel delivering accuracy - Google Patents
System and method for improving fuel delivering accuracy Download PDFInfo
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- CN104975972B CN104975972B CN201510150672.5A CN201510150672A CN104975972B CN 104975972 B CN104975972 B CN 104975972B CN 201510150672 A CN201510150672 A CN 201510150672A CN 104975972 B CN104975972 B CN 104975972B
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Classifications
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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
- F02D41/3005—Details not otherwise provided for
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- 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
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
-
- 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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- 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)
Abstract
The invention discloses the system and method for improving fuel delivering accuracy.Voltage measurement module, first-order difference module, second differnce module, third order difference module and injector driver module are included according to a kind of Fuel Control System of the principle of the disclosure.First voltage and second voltage at the first electric connector and the second electric connector of the fuel injector of the voltage measurement module measurement engine.The first-order difference module determines first-order difference based on the difference of the first voltage and second voltage.The second differnce module determines(i)The first-order difference with(ii)Second differnce between the previous value of the first-order difference.The third order difference module determines(i)The second differnce with(ii)Third order difference between the previous value of the second differnce.The injector driver module optionally applies power based on the third order difference to the fuel injector.
Description
Cross reference to related applications
The application is submitted on April 1st, 14/242,001,2014 with the U.S. Patent application No. submitted on April 1st, 2014
U.S. Patent application No. 14/242,247 and 14/231,807 phases of U.S. Patent application No. submitted on April 1st, 2014
Close.The entire disclosure of application is incorporated herein by reference above.
Technical field
This application involves explosive motor, and systems for by detecting and compensating fuel injector
Characteristic and improve fuel delivering accuracy system and method.
Background technology
Background description provided herein is to generally propose the background of the disclosure.In the background technique part
The work of the present inventor in illustrated degree and cannot it is described otherwise above for submit when the prior art sheet
The various aspects of specification, are not recognized it is the prior art for the disclosure explicitly or implicitly.
Air is sucked in engine by induction mnifold.The timing control of throttle valve and/or engine valve enters engine
Air-flow.Air is mixed with the fuel from one or more fuel injectors, so as to form air/fuel mixture.Air/
One or more combustor inner cylinders of the fuel mixture in engine.Such as sky can be started by the spark that spark plug provides
The burning of gas/fuel mixture.
Air/fuel mixture burn can produce moment of torsion and exhaust.Moment of torsion is via air/fuel mixture burn process
In heat release and expansion and produce.Engine transfers torque to speed changer via bent axle, and speed changer is via power train
Transfer torque to one or more wheels.Exhaust is discharged into exhaust system from cylinder.
Engine control module(ECM)Control the torque output of engine.ECM can be controlled based on the input of driver
The torque output of engine.Driver's input can include such as accelerator pedal position, brake pedal position and/or one
Or other multiple suitable driver's inputs.
The content of the invention
Voltage measurement module, first-order difference module, second order are included according to a kind of Fuel Control System of the principle of the disclosure
Difference block, third order difference module and injector driver module.The fuel injection of the voltage measurement module measurement engine
First voltage and second voltage at the first electric connector and the second electric connector of device.The first-order difference module is based on described
The difference of first voltage and second voltage determines first-order difference.The second differnce module determines(i)The first-order difference with
(ii)Second differnce between the previous value of the first-order difference.The third order difference module determines(i)The second differnce
With(ii)Third order difference between the previous value of the second differnce.The injector driver module is based on the third order difference
Optionally apply power to the fuel injector.
Included according to the first fuel control method of one kind of the principle of the disclosure:Measure the of the fuel injector of engine
First voltage and second voltage at one electric connector and the second electric connector, and based on the first voltage and second voltage
Difference determine first-order difference.The method further includes:Determine(i)The first-order difference with(ii)Before the first-order difference
Second differnce between one value, determines(i)The second differnce with(ii)Three ranks between the previous value of the second differnce
Difference, and power is optionally applied to the fuel injector based on the third order difference.
Included according to the second fuel control method of one kind of the principle of the disclosure:Measure the of the fuel injector of engine
First voltage and second voltage at one electric connector and the second electric connector, and based on the first voltage and second voltage
Difference determine first derivative.The method further includes:It is based on(i)The first derivative with(ii)The first derivative it is previous
Value determines second dervative, is based on(i)The second dervative with(ii)The previous value of the second dervative determines three order derivatives, and
Power is optionally applied to the fuel injector based on three order derivative.
The invention also discloses following technical scheme.
1st, a kind of Fuel Control System for vehicle, including:
Voltage measurement module, it is measured at the first electric connector and the second electric connector of the fuel injector of engine
First voltage and second voltage;
First-order difference module, it determines first-order difference based on the difference of the first voltage and second voltage;
Second differnce module, it is determined in i)The first-order difference and ii)Two between the previous value of the first-order difference
Order difference;
Third order difference module, it is determined in i)The second differnce and ii)Three between the previous value of the second differnce
Order difference;And
Injector driver module, it optionally applies power based on the third order difference to the fuel injector.
2nd, the Fuel Control System according to scheme 1, further includes:
Parameter determination module, it determines the minimum value of the third order difference and the maximum of the third order difference,
The minimum value and maximum of the wherein described injector driver module based on the third order difference are to the combustion
Material ejector optionally applies power.
3rd, the Fuel Control System according to scheme 2, further includes:
Pulsewidth module, it determines to apply to the fuel injector for fuel injection event based on desired fuel quality
The initial pulsewidth added;And
Module is adjusted, its described minimum value and maximum based on the third order difference adjusts the initial pulsewidth, with
Final pulsewidth is produced,
Wherein described injector driver module be based on the final pulsewidth and for the fuel injection event to described
Fuel injector optionally applies power.
4th, the Fuel Control System according to scheme 3, wherein:
The minimum value and maximum of the parameter determination module based on the third order difference are mended to determine to open the cycle
Repay value;
The parameter determination module determines to close Periodic Compensation value based on the minimum value of the third order difference;And
The adjustment module is adjusted described initial based on the closing Periodic Compensation value and the opening Periodic Compensation value
Pulsewidth, to produce the final pulsewidth.
5th, the Fuel Control System according to scheme 4, wherein:
The parameter determination module in the injector driver module based on terminating for previous fuel injection event
First time during pulse and corresponding to the cycle between the second time of the minimum value of the third order difference to determine
State the closing cycle of fuel injector;
The closing cycle of the parameter determination module based on the fuel injector and the predetermined difference for closing the cycle come
Determine the closing periodic increment of the fuel injector;And
The parameter determination module determines the closing Periodic Compensation value based on the closing periodic increment.
6th, the Fuel Control System according to scheme 5, wherein:
The final pulsewidth of the parameter determination module based on the previous fuel injection event and for described previous
Fuel injection event provides the pressure to the fuel of the fuel injector to determine to close period modulation value;And
The parameter determination module is based further on the closing period modulation value to determine the closing periodic increment.
7th, the Fuel Control System according to scheme 4, wherein:
The difference of the minimum value and maximum of the parameter determination module based on the third order difference determines the combustion
The opening amplitude of material ejector;
The parameter determination module determines the predetermined pulse width for previous fuel injection event based on the opening amplitude;
The parameter determination module based on the final pulsewidth for the previous fuel injection event with for described
The difference of the predetermined pulse width of previous fuel injection event determines the opening periodic increment of the fuel injector;And
The parameter determination module determines the opening Periodic Compensation value based on the opening periodic increment.
8th, the Fuel Control System according to scheme 7, wherein:
The final pulsewidth of the parameter determination module based on the previous fuel injection event and for described previous
Fuel injection event provides the pressure to the fuel of the fuel injector to determine to open period modulation value;And
The parameter determination module is based further on the opening period modulation value to determine the opening periodic increment.
9th, the Fuel Control System according to scheme 2, further includes:
Four order difference module, it is determined in i)The third order difference and ii)Four between the previous value of the third order difference
Order difference,
Wherein described injector driver module is based on the third order difference and the Four order difference to the fuel injection
Device optionally applies power.
10th, the Fuel Control System according to scheme 9, wherein:
The parameter determination module is determined based on the first time zero passage of the Four order difference described in the third order difference
Minimum value;And
The parameter determination module is determined based on second of zero passage of the Four order difference described in the third order difference
Maximum.
11st, a kind of fuel control method for vehicle, including:
Measure the first voltage and second at the first electric connector and the second electric connector of the fuel injector of engine
Voltage;
First-order difference is determined based on the difference of the first voltage and second voltage;
Determine in i)The first-order difference and ii)Second differnce between the previous value of the first-order difference;
Determine in i)The second differnce and ii)Third order difference between the previous value of the second differnce;And
Power is optionally applied to the fuel injector based on the third order difference.
12nd, the fuel control method according to scheme 11, further includes:
Determine the minimum value of the third order difference and the maximum of the third order difference;And
The minimum value and maximum based on the third order difference optionally apply power to the fuel injector.
13rd, the fuel control method according to scheme 12, further includes:
The initial arteries and veins for determining to the fuel injector to apply for fuel injection event based on desired fuel quality
It is wide;
The minimum value and maximum based on the third order difference adjust the initial pulsewidth, to produce final arteries and veins
It is wide;And
Optionally applied to the fuel injector for the fuel injection event based on the final pulsewidth dynamic
Power.
14th, the fuel control method according to scheme 13, further includes:
The minimum value and maximum based on the third order difference open Periodic Compensation value come definite;
Determine to close Periodic Compensation value based on the minimum value of the third order difference;And
The initial pulsewidth is adjusted based on the closing Periodic Compensation value and the opening Periodic Compensation value, to produce
State final pulsewidth.
15th, the fuel control method according to scheme 14, further includes:
Based on the first time when terminating pulse for previous fuel injection event with corresponding to the third order difference
The minimum value the second time between cycle determine the closing cycle of the fuel injector;
The closing cycle and the predetermined difference for closing the cycle based on the fuel injector determine the fuel injection
The closing periodic increment of device;And
The closing Periodic Compensation value is determined based on the closing periodic increment.
16th, the fuel control method according to scheme 15, further includes:
The final pulsewidth based on the previous fuel injection event and provided for the previous fuel injection event
To the fuel injector fuel pressure come determine close period modulation value;And
The closing period modulation value is based further on to determine the closing periodic increment.
17th, the fuel control method according to scheme 14, further includes:
The difference of the minimum value and maximum based on the third order difference determines the opening width of the fuel injector
Degree;
Predetermined pulse width for previous fuel injection event is determined based on the opening amplitude;
Based on the final pulsewidth for the previous fuel injection event and for the previous fuel injection event
The difference of the predetermined pulse width determine the opening periodic increment of the fuel injector;And
The opening Periodic Compensation value is determined based on the opening periodic increment.
18th, the fuel control method according to scheme 17, further includes:
The final pulsewidth based on the previous fuel injection event and provided for the previous fuel injection event
To the fuel injector fuel pressure come determine open period modulation value;And
The opening period modulation value is based further on to determine the opening periodic increment.
19th, the fuel control method according to scheme 12, further includes:
Determine in i)The third order difference and ii)Four order difference between the previous value of the third order difference;And
Power is optionally applied to the fuel injector based on the third order difference and the Four order difference.
20th, the fuel control method according to scheme 19, further includes:
The minimum value of the third order difference is determined based on the first time zero passage of the Four order difference;And
The maximum of the third order difference is determined based on second of zero passage of the Four order difference.
21st, a kind of fuel control method for vehicle, including:
Measure the first voltage and second at the first electric connector and the second electric connector of the fuel injector of engine
Voltage;
First derivative is determined based on the difference of the first voltage and second voltage;
Based on i)The first derivative and ii)The previous value of the first derivative determines second dervative;
Based on i)The second dervative and ii)The previous value of the second dervative determines three order derivatives;And
Power is optionally applied to the fuel injector based on three order derivative.
By illustrating, claims and attached drawing, be readily apparent other suitable application areas of the disclosure.Illustrate
It is intended merely to illustrate with the purpose of particular example, and is not intended to limit the scope of the present disclosure.
Brief description of the drawings
The disclosure will be more fully understood by embodiment and attached drawing, wherein:
Fig. 1 is the functional block diagram of example direct-injection engine system;
Fig. 2 is the functional block diagram of the exemplary fuel control system of the part comprising engine control module;
Fig. 3 is the voltage and current of fuel injector and for an injection events each seed ginseng definite based on voltage
Several exemplary graphs;
Fig. 4 is the flow chart of the exemplary method for the various parameters for describing the fuel injection event for determining fuel injector(Its
Middle Y is "Yes", and N is "No");
Fig. 5 is to describe flow of the control for the exemplary method of the fuel supply of the fuel injection event of fuel injector
Figure;And
Fig. 6 is to describe the inquiry for determining to use in fuel supply of the control for the fuel injection event of fuel injector
The flow chart of the exemplary method of value in table(Wherein Y is "Yes", and N is "No").
In the various figures, Ref. No. may be reused to represent similar and/or identical element.
Embodiment
Engine is in the mixture of combustor inner cylinder air and fuel to produce driving torque.Throttle valve adjustment, which enters, starts
The air-flow of machine.Fuel injector spray fuel.Spark plug can produce spark to start burning in cylinder.Cylinder can be controlled
Inlet valve and air bleeding valve with adjust from cylinder pass in and out stream.
Fuel injector receives fuel from fuel rail.High pressure fuel pump receives fuel from low-pressure fuel pump, and in fuel
Pressurize in rail to fuel.Low-pressure fuel pump provides fuel from fuel tank suction of fuel, and to high pressure fuel pump.Fuel injector
Inject fuel directly into the cylinder of engine.
However, different fuel injectors may have different opening and closing characteristics.For example, sprayed from different fuel
The fuel injector of emitter manufacturer may have different opening and closing characteristics.However, sprayed even if from same fuel
The fuel injector of emitter manufacturer may also have different opening and closing characteristics.Example opens and closes characteristic and includes example
Such as open the cycle and close the cycle.The opening cycle of fuel injector can be directed toward fuel injector and apply power to open fuel
The week between the second time when first time and fuel injector during injector actually open in response to application power
Phase.The closing cycle of fuel injector can refer to from fuel injector remove power to close fuel injector when first time
With fuel injector in response to removing power and cycle between the second time when reaching completely closed state.
It is each to determine that the application includes the difference in voltage at the first electric conductor and the second electric conductor based on fuel injector
Kind parameter.More particularly, using it is multiple and with difference come determine record difference second order, three ranks and quadravalence(It is secondary)The ginseng of derivative
Number.Engine control module(ECM)The characteristic of fuel injector is determined based on these parameters.Spies of the ECM based on fuel injector
Property control to fuel injector apply power.
Referring now to Fig. 1, the functional block diagram of the example engine system 100 of vehicle is offered.Engine system 100 includes
Engine 102,102 combustion air/fuel mixture of engine is to produce for motor vehicle driving torque.Although engine will be discussed
102 be spark-ignition direct-injection(SIDI)Engine, but engine 102 can include another type of engine.Hair
Motivation 102 can be equipped with one or more motor and/or generator unit(MGU).
Drawn air into by throttle valve 108 in induction mnifold 106.Throttle valve 108 can change into induction mnifold
106 air-flow.Only for example, throttle valve 108 can include the butterfly valve equipped with rotatable blades.Engine control module
(ECM)110 control throttle valve actuator modules 112(For example, electrical throttle valve control or ETC), and the valve actuator mould that throttles
Block 112 controls the opening of throttle valve 108.
Future, the air of Self inhaling manifold 106 was drawn into the cylinder of engine 102.Although engine 102 can include
More than one cylinder, but merely illustrate single representative cylinder 114.Pass through the sky of inlet valve Self inhaling manifold in 118 future 106
Gas is drawn into cylinder 114.Each cylinder can be equipped with one or more inlet valves.
ECM 110 controls the spray fuel into cylinder 114 via fuel injector 121.Fuel injector 121 will for example
The fuel of gasoline is directly injected in cylinder 114.Fuel injector 121 is solenoid type direct fuel injection injector.Helical
Cast direct fuel injection injector is different from port fuel injection(PFI)Injector and piezo-electric type fuel injector.ECM 110
Fuel injection can be controlled to realize desired air/fuel ratio, such as stoichiometric air/fuel ratio.Each cylinder can be with
Equipped with a fuel injector.
The fuel ejected is mixed with air, and forms air/fuel mixture in cylinder 114.Based on ECM 110
The signal sent, spark actuator module 122 can encourage the spark plug 124 in cylinder 114.Each cylinder can be equipped with one
Spark plug.Spark caused by spark plug 124 lights air/fuel mixture.
The operation of engine 102 can use four-stroke cycle or another suitable operation circulation.Described below this
Four strokes are properly termed as intake stroke, compression stroke, combustion stroke and exhaust stroke.In bent axle(It is not shown)Each turn of mistake
Cheng Zhong, can occur two in this four strokes in cylinder 114.Therefore, cylinder is allowed to undergo all four strokes, bent axle is just
Two turns must be rotated.
During intake stroke, it is drawn into by the air of inlet valve Self inhaling manifold in 118 future 106 in cylinder 114.
The fuel that fuel injector 121 sprays is mixed with air, and forms air/fuel mixture in cylinder 114.Once firing
One or many fuel injections can be performed by burning in cyclic process.During compression stroke, the piston in cylinder 114(Do not show
Go out)Compressed air/fuel mixture.During combustion stroke, the burning driving piston of air/fuel mixture, so as to drive
Dynamic crankshaft.During exhaust stroke, the byproduct of burning is discharged to exhaust system 127 by air bleeding valve 126.
Low-pressure fuel pump 142 provides high pressure fuel pump from 146 suction of fuel of fuel tank, and by the fuel under low pressure
150.Although merely illustrating fuel tank 146, more than one fuel tank 146 can be implemented.High pressure fuel pump 150 is in fuel rail
Further pressurize to fuel in 154.The fuel injector of engine 102(Include fuel injector 121)Connect via fuel rail 154
Receive fuel.The low pressure that low-pressure fuel pump 142 provides is for the high pressure that high pressure fuel pump 150 provides.
Low-pressure fuel pump 142 can be the pump of driven by power.High pressure fuel pump 150 can be variable output pump, by starting
Machine 102 mechanically drives.Signal that pump actuator module 158 can be sent based on ECM 110 controls high pressure fuel pump
150 output.Pump actuator module 158 can also control the operation of low-pressure fuel pump 142(For example, open/close state).
Engine system 100 includes fuel pressure sensor 176.Fuel pressure sensor 176 is measured in fuel rail 154
The pressure of fuel.Engine system 100 can include one or more other sensors 180.For example, other sensors 180 can
To include other one or more fuel pressure sensors, quality air flow velocity(MAF)Sensor, manifold absolute pressure(MAP)
Sensor, intake air temperature(IAT)Sensor, refrigerant temperature sensor, oil temperature sensor, crankshaft position sensor and/
Or other one or more suitable sensors.
Referring now to Fig. 2, the functional block diagram of the exemplary fuel control system of the Examples section comprising ECM 110 is offered.
Fuel supply module 204 determines the desired fuel nozzle parameter 208 of the fuel injection event of fuel injector 121.For example, fuel
Supplying module 204 can determine the target start timing of the desired fuel quality and fuel injection event of fuel injection event.Combustion
Expect the target air ratio that supplying module 204 can be for example based on fuel injection event(For example, stechiometry)And cylinder
Expection air quality in 114 determines desired fuel quality.In the combustion cycle process of cylinder 114, one may be performed
A or multiple fuel injection events.
Pulsewidth module 212 determines the initial of fuel injection event based on desired fuel quality(Fuel injection)Pulsewidth 216.
The fuel pressure and/or one or more other specifications that pulsewidth module 212 can be based further in fuel rail 154 are first to determine
Beginning pulsewidth 216.Initial pulsewidth 216 corresponds to applies power to cause during fuel injection event to fuel injector 121
The cycle of the injection target fuel mass under these operating conditions of fuel injector 121.
However, different fuel injectors may have the different closing cycles, open cycle, opening amplitude and other spies
Property.The closing cycle of fuel injector can refer to the cycle between the following time:Power is removed from fuel injector to close combustion
First time during material ejector;Actually become to close and stop the second time during spray fuel with fuel injector.
Although all fuel injectors are all controlled to spray the fuel of identical quantity, cycle longer fuel injector is closed
The fuel of injection will be more compared with short fuel injector than closing the cycle.
The opening cycle of fuel injector can refer to the cycle between the following time:Apply power to fuel injector to beat
Open first time during fuel injector;When actually becoming to open and start spray fuel with fuel injector second when
Between.Although all fuel injectors are all controlled to spray the fuel of identical quantity, cycle longer fuel spray is opened
The fuel of emitter injection will be fewer compared with short fuel injector than opening the cycle.The opening amplitude of fuel injector can correspond to fire
How much material ejector is directed to a fuel injection event opening.
Adjustment module 220 is adjusted just based on the one or more injector parameters 222 determined for fuel injector 121
Beginning pulsewidth 216, to produce final pulsewidth 224.Adjust initial pulsewidth 216 and can include and extend or shorten initial pulsewidth 216 with true
Fixed final pulsewidth 224, such as by shifting to an earlier date or postponing the beginning of pulse and/or shift to an earlier date or postpone the end of pulse.In detail below
Illustrate determining for final pulsewidth 224 and injector parameter 222.
Injector driver module 236 determines target current curve based on final pulsewidth 224(It is not shown).Injector drives
Dynamic device module 236 is electrically connected via high side line 240 and downside line 244 to the first electric connector of fuel injector 121 and second
Device applies high voltage and low-voltage, to realize target current curve by fuel injector 121 for fuel injection event.
Injector driver module 236 can use reference voltage 248 and boost voltage 252 to produce high voltage and low electricity
Pressure.Reference voltage 248 and boost voltage 252 can be direct currents(DC)Voltage.Such as electricity based on vehicle of reference voltage module 256
Pond(It is not shown)Voltage reference voltage 248 is provided.DC/DC conversion modules 260 increase(Increase)Reference voltage 248 is with production
Raw boost voltage 252.
Voltage measurement module 261 measures the high voltage at the first electric connector of fuel injector 121, and based on first
Voltage at electric conductor produces high side voltage 262.Voltage measurement module 261 also measures the second electrical connection of fuel injector 121
Low-voltage at device, and downside voltage 263 is produced based on the voltage at the second electric conductor.Voltage measurement module 261 relative to
It is grounded reference potential measurement high voltage and low-voltage.
Voltage difference module 264 is based on downside voltage 263 and the difference of high side voltage 262 produces voltage difference 268.For example, voltage
Voltage difference 268 can be set equal to downside voltage 263 and subtract high side voltage 262 by difference module 264.For another example,
Voltage difference 268 can be set equal to high side voltage 262 and subtract downside voltage 263 by voltage difference module 264.Voltage difference module
264 pairs of downside voltages 263 and high side voltage 262 sample, and the value of voltage difference 268 is produced based on predetermined sample rate.
It can implement such as low-pass filter(LPF)Or a wave filter of the wave filter of another suitable type to voltage difference 268 into
Row filtering.It can also implement analog/digital converter(ADC)So that voltage difference 268 includes corresponding digital value.
Single order summer module 272 determines single order summation 276 by summing to the last n values of voltage difference 268.N is
Integer more than one.Only for example, N can be 8 or another suitable value.Single order summer module 272 is per N number of sampling
Cycle renewal single order summation 276 so that just update single order summation 276 whenever N number of new value of voltage difference 268 is received.
Second order summer module 280 to the last M value summation of single order summation 276 by determining second order summation 284.M
It is greater than one integer.Only for example, M can be 10 or another suitable value.When updating single order summation 276,
Second order summer module 280 just updates second order summation 284.
Three rank summer modules 288 to the last M value summation of second order summation 284 by determining three rank summations 292.Often
When second order summation 284 updates, three rank summer modules 288 just update three rank summations 292.Quadravalence summer module 296 passes through
Quadravalence summation 300 is determined to the last M value summation of three rank summations 292.When updating three rank summations 292, quadravalence summation
Device module 296 just updates quadravalence summation 300.Five rank summer modules 304 pass through the last M value summation to quadravalence summation 300
And determine five rank summations 308.When updating quadravalence summation 300, five rank summer modules 304 just update five rank summations 308.Though
The example for calculating single order summation to five rank summations 276,284,292,300 and 308 is so shown and discussed, but can determine two
A or more summation, and more or fewer summer module can be implemented.Single order summer module 272 reduces sampling
Error and shake, and also reduce the number of necessary computing later.Other summer modules provide shape and keep wave filter.And
And although it is each to use M value, second order summer mould to discuss second order summer module to five rank summer modules
Block can use different number preceding values to one or more of five rank summer modules.
First-order difference module 312 is previous based on five rank summations 308 and five rank summations 308(It is for example, last)The difference of value
To determine first-order difference 316.Second differnce module 320 is previous based on first-order difference 316 and first-order difference 316(It is for example, last
's)The difference of value determines second differnce 324.
Third order difference module 328 is previous based on second differnce 324 and second differnce 324(It is for example, last)The difference of value
To determine third order difference 332.Four order difference module 336 is previous based on third order difference 332 and third order difference 332(It is for example, last
's)The difference of value determines Four order difference 340.
First-order difference 316 corresponds to the first derivative of voltage difference 268(d/dt)And led with the single order with voltage difference 268
Number(d/dt)Identical shape.Second differnce 324 corresponds to the second dervative of voltage difference 268(d2/dt2)And have and voltage
Poor 268 second dervative(d2/dt2)Identical shape.Third order difference 332 corresponds to three order derivatives of voltage difference 268(d3/dt3)
And with three order derivatives with voltage difference 268(d3/dt3)Identical shape.Four order difference 340 corresponds to the four of voltage difference 268
Order derivative(d4/dt4)And with the Fourth-Derivative with voltage difference 268(d4/dt4)Identical shape.In various embodiments
In, ECM 110 can be included and be determined first derivative, second dervative, three order derivatives, the first derivative module of Fourth-Derivative, second order
Derivative module, three order derivative modules and Fourth-Derivative module(It is not shown).The first derivative module, second dervative module, three
Order derivative module and Fourth-Derivative module can be by comprising to substitute or be attached to first-order difference module 312, second differnce module
320th, third order difference module 328 and Four order difference module 336.
In addition, time and the first derivative of voltage difference 268 of minimum value and the maximum generation of first-order difference 316(d/dt)
Minimum value it is identical with maximum.The time that the minimum value and maximum of second differnce 324 the occur also second order with voltage difference 268
Derivative(d2/dt2)Minimum value it is identical with maximum.The time that the minimum value and maximum of third order difference 332 occur also with voltage
Poor 268(d3/dt3)Minimum value it is identical with maximum.However, as described above, calculate computing of the first derivative to Fourth-Derivative
Efficiency is high not as the operation efficiency for calculating first-order difference to Four order difference 316,324,332 and 340.Due to being determined with set rate
First-order difference is to Four order difference 316,324,332 and 340, so first-order difference is accurate to Four order difference 316,324,332 and 340
Ground represents first derivative to Fourth-Derivative.In addition, using summation rather than average value, computational complexity, Er Qiewei can be reduced
Hold the shape of input signal.
First-order difference is calculated to the example of Four order difference 316,324,332 and 340 although discussing, and can determine two
A or more difference, and more or fewer difference block can be implemented.Although moreover, it is to use voltage difference 268
Aspect discusses the example, but the application is suitable for identifying the change of other signals.
Parameter determination module 344 determines that fuel sprays based on voltage difference 268 and third order difference 332 and Four order difference 340
The injector parameter 222 of emitter 121.Parameter determination module 344 can additionally or alternatively based on it is one or more other
Parameter determines injector parameter 222.For example, to be based on third order difference 332 and Four order difference 340 with parameter determination module 344
Determine the same mode of injector parameter 222, parameter determination module 344 can three order derivatives and quadravalence based on voltage difference 268
Derivative determines injector parameter 222.In the case, first-order difference module 312, second differnce module 320, third order difference module
328 and Four order difference module 336 can determine first derivative, second dervative, three order derivatives, Fourth-Derivative, to substitute or add
To definite first-order difference, second differnce, third order difference and Four order difference.
Fig. 3 includes a curve map, which includes the voltage difference 268 for fuel injection event, sprayed by fuel
Example track of electric current 350, third order difference 332, Four order difference 340 and the fuel flow rate 352 of emitter 121 to the time.Ginseng now
According to Fig. 2 and Fig. 3, injector driver module 236 is from the time 354 until the time 358 is directed to fuel injection event to fuel injection
Device 121 applies pulse.As 350 illustrate, on the basis of pulse is applied to fuel injector 121, electric current flows through fuel
Injector 121.
Between when injector driver module 236 terminates pulse and when fuel injector 121 reaches completely closed state
Cycle is properly termed as the closing cycle of fuel injector 121.The Four order difference after injector driver module 236 terminates pulse
The 340 first time zero passages occurred can correspond to the time that fuel injector 121 reaches completely closed state.In figure 3, quadravalence
Difference 340 is probably in 362 first time of time zero passage.Therefore, the closing cycle of fuel injector 121 corresponds to the time 358 in Fig. 3
With the cycle between the time 362.Terminate time and the pulse of the pulse of fuel injection event based on injector driver module 236
Cycle after end between the time of Four order difference 340 first time zero passage, parameter determination module 344 determine fuel injector
121 closing cycle.
In Four order difference 340 first time zero passage, third order difference 332 reaches minimum value.In Fig. 3 three jumps are represented with 366
Divide 332 minimum value.When second of zero passage occurs for Four order difference 340 after injector driver module 236 terminates pulse, three
Order difference 332 reaches maximum.In figure 3, second of zero passage of Four order difference 340 probably occurs in the time 370, and passes through
374 represent the maximum of third order difference 332.
In various embodiments, to first time zero passage third order difference 332 can be identified using the first predetermined bias
Minimum value, and/or to second of zero passage the maximum of third order difference 332 can be identified using the second predetermined bias.For example, three
The minimum value of order difference 332 can occur in the first predetermined bias before or after the first time zero passage of Four order difference 340,
And/or the maximum of third order difference 332 can be in the second predetermined bias before or after second of zero passage of Four order difference 340
Occur.The application of the first predetermined bias and/or the second predetermined bias can be performed, with the minimum preferably with third order difference 332
Value is related to maximum.
The difference of the maximum 374 of minimum value 366 and third order difference 332 of the parameter determination module 344 based on third order difference 332
To determine the opening amplitude of fuel injector 121.
The opening amplitude for closing cycle and fuel injector 121 based on fuel injector 121, can adjust and be sprayed to fuel
Emitter 121 apply pulse length so that fuel injector 121 spray quantity of fuel will as far as possible with other fuel injectors
Close to identical, although inevitably there is manufacturing variation between fuel injector.Determined for each fuel injector and using adjustment.Such as
Fruit is not added with adjusting, and the difference between fuel injector may can cause the fuel of fuel injector injection varying number.
Parameter determination module 344 can be based on fuel injector 121 the closing cycle and the predetermined difference for closing the cycle come it is true
Determine the closing periodic increment of fuel injector 121(delta).It can be calibrated based on the closing cycle of multiple fuel injectors pre-
Surely the cycle is closed.Only for example, parameter determination module 344 can subtract fuel injector 121 based on the predetermined closing cycle
The cycle is closed to set closing periodic increment, or periodic increment will be closed and be set equal to predetermined close the cycle and subtract fuel spray
The closing cycle of emitter 121.
Parameter determination module 344 can be based on closing periodic increment and close period modulation value to determine to close Periodic Compensation
Value.Only for example, parameter determination module 344 can be set based on periodic increment is closed with closing the product of period modulation value
Periodic Compensation value is closed, or Periodic Compensation value will be closed and be set equal to close periodic increment with closing multiplying for period modulation value
Product.Parameter determination module 344 can be based on the final pulsewidth 224 used fuel injection event and the fuel of fuel injection event
Pressure 380 come determine close period modulation value.Parameter determination module 344 can be for example using making final pulsewidth 224 and fuel pressure
Power 380 determines closing period modulation value with closing one in the related function and mapping of period modulation value.Fuel pressure 380
Corresponding to the pressure of the fuel provided for fuel injection event to fuel injector 121, and can be for example using fuel pressure
Force snesor 176 measures fuel pressure 380.
Parameter determination module 344 can be based on the final pulsewidth 224 and fuel injection thing used for fuel injection event
The predetermined pulse width of part determines the opening periodic increment of fuel injector 121.Only for example, parameter determination module 344 can be with
The difference of the predetermined pulse width of final pulsewidth 224 and fuel injection event based on fuel injection event sets opening periodic increment.
Parameter determination module 344 can be for example based on fuel injection event final pulsewidth 224 subtract the predetermined arteries and veins of fuel injection event
Width sets opening periodic increment, or the final pulsewidth 224 for opening periodic increment and being set equal to fuel injection event is subtracted
Go the predetermined pulse width of fuel injection event.
Parameter determination module 344 can be based on the opening amplitude of fuel injector 121 and the fuel pressure of fuel injection event
Power 380 determines the predetermined pulse width of fuel injection event.Determining for the opening amplitude of fuel injector 121 is discussed above.Ginseng
During number determining module 344 can be for example using making opening amplitude and fuel pressure 380 and the relevant function of predetermined pulse width and mapping
One determine predetermined pulse width.
Parameter determination module 344 can be based on opening periodic increment and open period modulation value to determine to open Periodic Compensation
Value.Only for example, parameter determination module 344 can be set based on periodic increment is opened with opening the product of period modulation value
Periodic Compensation value is opened, or Periodic Compensation value will be opened and be set equal to open periodic increment with opening multiplying for period modulation value
Product.Parameter determination module 344 can be based on the final pulsewidth 224 used fuel injection event and the fuel of fuel injection event
Pressure 380 come determine open period modulation value.Parameter determination module 344 can be for example using making final pulsewidth 224 and fuel pressure
Power 380 determines opening period modulation value with opening one in the related function and mapping of period modulation value.Fuel pressure 380
Corresponding to the pressure of the fuel provided for fuel injection event to fuel injector 121, and can be for example using fuel pressure
Force snesor 176 measures fuel pressure 380.
Parameter determination module 344 can determine the value in one or more inquiry tables, and the inquiry table is used for based on final
Pulsewidth 224 and fuel pressure 380 determine to open period modulation value and close period modulation value.Alternatively, the value in inquiry table can
To be determined using the calibration module 382 to communicate with ECM 110 in lab setup.Parameter determination module 344 and/or storage mould
Block 384 can for example be stored in the value determined in non-transitory nonvolatile computer readable medium.
As described above, adjustment module 220 adjusts fuel injection event based on one or more of injector parameter 222
Initial pulsewidth 216, with determine fuel injection event final pulsewidth 224.Only for example, adjustment module 220 can be based on
Initial pulsewidth 216, open Periodic Compensation value and close Periodic Compensation value to set final pulsewidth 224.Adjusting module 220 can example
As use makes initial pulsewidth 216, opens Periodic Compensation value and closes Periodic Compensation value and final 224 relevant function of pulsewidth and reflects
One hit sets final pulsewidth 224.Only for example, final pulsewidth 224 can be set equal to by adjustment module 220
Initial pulsewidth 216, open Periodic Compensation value and close the summation of Periodic Compensation value, or based on initial pulsewidth 216, opening cycle
Offset and close the summation of Periodic Compensation value final pulsewidth 224 is set.Although example above is in fuel injector 121
What aspect was discussed, but can be determined for each fuel injector and close week with corresponding using corresponding Periodic Compensation value of opening
Phase offset.
Fig. 4 is a flow chart, depict definite single order summation to five rank summations 276,284,292,300 and 308 and
First-order difference to Four order difference 316,324,332 and 340 so as to determine the closing of the fuel injection event of fuel injector 121 week
Phase, close Periodic Compensation value and open a kind of exemplary method of Periodic Compensation value.Control process can be since 404, wherein joining
Number determining module 344 determines whether injector driver module 236 has stopped being directed to fuel injection event to fuel injector 121
Apply pulse.If 404 be yes, parameter determination module 344 can start timer, and control process to continue 408.
If 404 be no, control process may remain in 404.
408, voltage difference module 264 samples high side voltage 262 and downside voltage 263, and is produced based on sample
The value of raw voltage difference 268.Parameter determination module 344 can also reset Sample Counter value 408.412, parameter determines mould
Block 344 determines whether Sample Counter value is less than N.It is used for determining single order summation as described above, N is single order summer module 272
The number of 276 value.If 412 be yes, control process may return to 408.If 412 be no, control process continues
Carry out 416.
416, single order summer module 272 determines single order summation 276 based on the last n values of voltage difference 268.Second order
Last M value of the summer module 280 based on single order summation 276 determines second order summation 284.Three rank summer modules, 288 base
Three rank summations 292 are determined in the last M value of second order summation 284.Quadravalence summer module 296 is based on three rank summations 292
Last M value determines quadravalence summation 300.Last M value of the five rank summer modules 304 based on quadravalence summation 300 determines
Five rank summations 308.
One equally between 416, the definite five rank summations 308 of first-order difference module 312 and the last value of five rank summations 308
Order difference 316.Second differnce module 320 determines the second differnce between first-order difference 316 and the last value of first-order difference 316
324.Third order difference module 328 determines the third order difference 332 between second differnce 324 and the last value of second differnce 324.Quadravalence
Difference block 336 determines the Four order difference 340 between third order difference 332 and the last value of third order difference 332.Parameter determination module
344 are also incremented by update counter value 416, and Sample Counter value is resetted.
420, parameter determination module 344 determines whether update counter value is less than predetermined value.If 420 be yes, control
Process processed returns to 408.If 420 be no, control process continues 424.Predetermined value is adjustable, and based on use
The number of the sample of voltage difference 268 necessary to all following modules of new value filling sets predetermined value:Single order summer module
272nd, second order summer module 280, three rank summer modules 288, quadravalence summer module 296, five rank summer modules 304,
First-order difference module 312, second differnce module 320, third order difference module 328 and Four order difference module 336.Only for example,
Example based on Fig. 2, predetermined value can be set greater than or be equal to:
(N*M)+Q (N* (M-1))+N*R,
Wherein N is the number for the sample that single order summer module 272 uses, and M is that second order summer module 280, three ranks are asked
The number of the sample used with device module 288, quadravalence summer module 296 and five rank summer modules 304(Using identical number
In the example of purpose sample), Q be implemented just to update its defeated when single order summer module 272 updates single order summation 276
The number of the summer module gone out, and R is the number of implemented difference block.In the figure 2 example, Q is equal to 4(For
Second order summer module 280, three rank summer modules 288, quadravalence summer module 296 and five rank summer modules 304), and
And R is equal to 4(For first-order difference module 312, second differnce module 320, third order difference module 328 and Four order difference module
336).
424, parameter determination module 344 can monitor the first time zero passage of Four order difference 340.Parameter determination module 344
The third order difference 332 that the minimum value of third order difference 332 can be identified as occurring in the first time zero passage of Four order difference 340
Value.Parameter determination module 344 can also monitor second of zero passage of Four order difference.Parameter determination module 344 can be by three jumps
Points 332 maximum is identified as the value of the third order difference 332 occurred in second of zero passage of Four order difference 340.Although no
Be explicitly illustrated, but control process continue with 424 produce voltage differences 268 sample, and update single order summation 276,
Second order summation 284, three rank summations 292,300 and five rank summation 308 of quadravalence summation and first-order difference 316, second differnce 324,
Third order difference 332 and Four order difference 340 are with the minimum value and maximum of definite third order difference 332.
Parameter determination module 344 can be in the 428 closing cycles for determining fuel injector 121.Parameter determination module 344 can
To determine the closing cycle of fuel injector 121 based on timer value during Four order difference 340 first time zero passage.
Parameter determination module 344 can also be in the 428 opening Periodic Compensation values for determining fuel injector 121 and closing cycle
Offset.The difference of the maximum of minimum value and third order difference 332 of the parameter determination module 344 based on third order difference 332 determines
The opening amplitude of fuel injector 121.Parameter determination module 344 can be based on fuel injector 121 the closing cycle with it is predetermined
The difference for closing the cycle determines the closing periodic increment of fuel injector 121.Only for example, parameter determination module 344 can be with
Closing cycle of fuel injector 121 is subtracted to set closing periodic increment based on the predetermined closing cycle, or will be closed the cycle
Increment is set equal to the closing cycle for subtracting fuel injector 121 in the predetermined closing cycle.
Parameter determination module 344 can be based on closing periodic increment and close period modulation value to determine to close Periodic Compensation
Value.Only for example, parameter determination module 344 can be set based on periodic increment is closed with closing the product of period modulation value
Periodic Compensation value is closed, or Periodic Compensation value will be closed and be set equal to close periodic increment with closing multiplying for period modulation value
Product.Parameter determination module 344 can be based on the final pulsewidth 224 used fuel injection event and the fuel of fuel injection event
Pressure 380 determines the closing period modulation value of fuel injection event.Parameter determination module 344 can be for example using making final arteries and veins
Wide 224 and fuel pressure 380 determine closing period modulation with closing one in the related function and mapping of period modulation value
Value.
Parameter determination module 344 can be based on the final pulsewidth 224 and fuel injection thing used for fuel injection event
The predetermined pulse width of part determines the opening periodic increment of fuel injector 121.Only for example, parameter determination module 344 can be with
The difference of the predetermined pulse width of final pulsewidth 224 and fuel injection event based on fuel injection event sets opening periodic increment.
Parameter determination module 344 can be for example based on fuel injection event final pulsewidth 224 subtract the predetermined arteries and veins of fuel injection event
Width sets opening periodic increment, or the final pulsewidth 224 for opening periodic increment and being set equal to fuel injection event is subtracted
Go the predetermined pulse width of fuel injection event.
Parameter determination module 344 can be based on the opening amplitude of fuel injector 121 and the fuel pressure of fuel injection event
Power 380 determines the predetermined pulse width of fuel injection event.Parameter determination module 344 can be for example using making opening amplitude and fuel
Pressure 380 determines predetermined pulse width with opening one in the relevant function of period modulation value and mapping.
Parameter determination module 344 can be based on opening periodic increment and open period modulation value to determine to open Periodic Compensation
Value.Only for example, parameter determination module 344 can be set based on periodic increment is opened with opening the product of period modulation value
Periodic Compensation value is opened, or Periodic Compensation value will be opened and be set equal to open periodic increment with opening multiplying for period modulation value
Product.Parameter determination module 344 can be based on the final pulsewidth 224 used fuel injection event and the fuel of fuel injection event
Pressure 380 determines the opening period modulation value of fuel injection event.Parameter determination module 344 can be for example using making final arteries and veins
Wide 224 and fuel pressure 380 determine opening period modulation with opening one in the related function and mapping of period modulation value
Value.
As set forth above, it is possible to sprayed using closing Periodic Compensation value and opening Periodic Compensation value to adjust for future fuel
Event and definite initial pulsewidth 216.
Fig. 5 is the flow for describing the exemplary method that control supplies the fuel of the fuel injection event of fuel injector 121
Figure.Control process can be since 504, and wherein pulsewidth module 212 determines the initial of the fuel injection event of fuel injector 121
Pulsewidth 216.Pulsewidth module 212 can determine initial pulsewidth 216, mesh based on the aimed quality determined for fuel injection event
Mark quality can be determined based on the expection air quality in target air mixture and cylinder 114.
508, adjustment module 220 is based on opening Periodic Compensation value and closing Periodic Compensation value to adjust initial pulsewidth 216
To produce final pulsewidth 224.For example, final pulsewidth 224 can be set equal to initial pulsewidth 216, opened by adjustment module 220
Periodic Compensation value and the summation for closing Periodic Compensation value, or based on initial pulsewidth 216, opening Periodic Compensation value and close the cycle
The summation of offset sets final pulsewidth 224.512, injector driver module 236 is based on final pulsewidth 224 to fuel
Injector 121 applies power.Apply power to fuel injector 121, fuel injector 121 should be caused to be directed to fuel injection thing
Part is opened and spray fuel.
Fig. 6 is the flow chart for describing the exemplary method for determining mapping or value in inquiry table, and the mapping or inquiry table can be with
Used by parameter determination module 344 to determine opening period modulation value as described above and close period modulation value.Inquiry table makes
It is expected fuel mass and it is expected that fuel pressure is related to opening period modulation value and closing period modulation value.Method shown in Fig. 6
It can be performed by parameter determination module 344 or be performed by calibration module 382 and memory module 384.
602, this method determine for it is expected fuel mass and it is expected fuel pressure master pulse is wide, leading open-width degree and master
Close the cycle.For example, this method can be based on it is expected fuel mass and fuel pressure respectively from multiple master pulses it is wide, open amplitude and
Close wide cycle selection master pulse, opening amplitude and close the cycle.Master pulse is wide, open amplitude and the closing cycle can be true by characterizing
The injector of fixed number amount(For example, 24 injectors)To make a reservation for.
604, this method determines opening amplitude adjusted value and closes period modulation value to be estimated.For example, this method
It can start adjusted value being arranged to zero, and then after each estimation with pre-determined incremental amount(For example, 0.1)Increase adjustment
Value, until adjusted value is equal to one.With regard to this point, this method can be under the conditions of different operating(For example, different fuel quality and fuel
Under pressure)Estimate same group of adjusted value.
606, this method determine for the particular injector of engine 102 opening amplitude and close the cycle.This method
It can determine that injector opens amplitude and injector closes the cycle based on fuel mass and fuel pressure it is expected.For example, the party
Method can be determined for the spray using fuel mass and fuel pressure and opening amplitude and the predetermined mapping in closing cycle it is expected
The opening amplitude of emitter and closing cycle.
608, this method determines the pulsewidth after the adjustment of injector.For example, this method can use for example following relation
Determine the pulsewidth after adjustment:
PWadj = PWmstr + (OMmstr – OMinj)*Kom + (CPmstr – CPinj) *Kcp
Wherein PWadj is the pulsewidth after adjustment, and PWmster is that master pulse is wide, and OMmstr is leading open-width degree, and OMinj is spray
Emitter opens amplitude, and Kom is opening amplitude adjusted value, and CPmster is the main closing cycle, and CPinj is that injector is closed the cycle, and
Kcp is to close period modulation value.
610, this method based on the pulsewidth after adjustment, it is expected that fuel pressure, injector open amplitude and injector is closed
Cycle carrys out the fuel mass output of estimating injector.For example, this method can based on the pulsewidth after adjustment, it is expected fuel pressure,
Injector opens the predetermined relationship between amplitude, injector closing cycle and fuel mass output to estimate that fuel mass exports.
Predetermined relationship can be embodied in inquiry table and/or equation.
612, this method determines whether all to have estimated fuel mass output for all injectors of engine 102.
If all having estimated fuel mass output for all injectors, this method continues 614.Otherwise, this method is returned
Return to 606 and determine not yet to estimate it opening amplitude and the pass of injector of the engine 102 of fuel mass output
The closed cycle phase.
614, this method determines the average and standard deviation of the fuel supply error associated with each injector.Should
Method can determine that the fuel of injector supplies by the fuel mass output for determining injector and the difference for it is expected fuel mass
Error.616, this method determines whether the average and standard deviation of fuel supply error is less than and is averaged and the storage of standard deviation
Value.If the average and standard deviation of fuel supply error is less than storage value, this method continues 618.Otherwise, this method
Continue 620.618, this method storage opening amplitude and period modulation value and corresponding average and standard deviation are closed.
Pulsewidth after the adjustment of each injector can also be stored as the injector and it is expected fuel mass and fuel pressure by this method
Desired pulse width under power.
620, this method is determined whether for it is expected fuel mass and fuel pressure has estimated predetermined group of opening
All opening amplitudes and closing period modulation value within amplitude and closing period modulation value.As it appears from the above, the opening of predetermined group
Amplitude and closing period modulation value can be according to pre-determined incremental amounts(For example, 0.1)Change from zero to one.If for it is expected
Fuel mass and fuel pressure have estimated all opening amplitudes and have closed period modulation value, then this method continues 622.It is no
Then, this method continues 604 and estimates the opening amplitude not yet estimated and close period modulation value.
622, this method determines whether it is expected fuel mass for predetermined group and it is expected within fuel pressure
All expectation fuel mass and expectation fuel pressure have all estimated opening amplitude and have closed period modulation value.If for pre-
Surely the expectation fuel mass organized and it is expected that all expectation fuel mass within fuel pressure and fuel pressure have all estimated opening
Amplitude terminates with closing period modulation value, then this method.Otherwise, this method continues 602 and estimates for different expectations
The opening amplitude of fuel mass and pressure and closing period modulation value.
In order to determine to open and close period modulation value using inquiry table, parameter determination module 344 can be by desired pulse width
Respectively equal to final pulsewidth 224 and fuel pressure 380 are arranged to expectation fuel pressure.Parameter determination module 344 then can be with
Adjusted value is equal to be stored in the last value for corresponding to desired pulse width and it is expected fuel pressure in inquiry table.Parameter
Determining module 344 can for example being equal to opening amplitude adjusted value by will open period modulation value be based on opening amplitude
Adjusted value determines to open period modulation value.
The property of preceding description is merely exemplary, and is in no way intended to limit the application or use of the disclosure, the disclosure.
It can implement the wide in range teaching of the disclosure with diversified forms.Therefore, although the disclosure contains specific example, this
Disclosed true scope should not be so restricted, because by studying schema, specification and appended claims, will be easy
Expect other modifications." at least one in A, B and C " this phrase used herein is construed as meaning logic(A
Or B or C), use the logic OR of nonexcludability.It should be appreciated that a kind of one or more of method step can be with different
Sequentially(Or simultaneously)Perform, and do not change the principle of the disclosure.
In this application, comprising in following definition, this term of module can be replaced with circuit this term.Module this
A term can refer to following element, be a part for following element or comprising following element:Application-specific integrated circuit
(ASIC);Numeral, simulation or hybrid analog-digital simulation/numeral discrete circuit;Numeral, simulation or hybrid analog-digital simulation/digital integrated electronic circuit;Combination
Logic circuit;Field programmable gate array(FPGA);Perform the processor of code(Shared, dedicated or group);Storage by
The memory for the code that processor performs(Shared, dedicated or group);Other of the illustrated function of offer are suitable hard
Part component;Or some or all of combination of said elements, such as the combination in system level chip.
This term of the code being used above can include software, firmware and/or microcode, and can refer to program, example
Journey, function module, class, and/or object.This term of common processor, which is forgiven, performs multiple mould some or all of codes in the block
Single processor.This term of group's processor is forgiven performs one or more moulds in the block one with Attached Processor in combination
The processor of a little or all codes.This term of common storage forgives the list for storing multiple mould some or all of codes in the block
A memory.This term of group memory forgive stored in combination with annex memory one or more moulds it is more in the block or
The memory of all codes.This term of memory can be the subset of this term of computer-readable medium.It is computer-readable
This term of medium does not forgive the temporary electric signal and electromagnetic signal by Medium Propagation, thus can be considered as it is tangible and
And non-transitory.The non-limiting example of non-transitory visible computer readable medium includes nonvolatile memory, volatile
Property memory, magnetic storage apparatus and optical storage apparatus.
The apparatus and method illustrated in the application can be partially or fully by being held by one or more processors
Capable one or more computer programs are implemented.These computer programs include and are stored in the tangible meter of at least one non-transitory
Processor-executable instruction on calculation machine computer-readable recording medium.Computer program can also include and/or dependent on the data stored.
Claims (17)
1. a kind of Fuel Control System for vehicle, including:
Voltage measurement module, it measures first at the first electric connector and the second electric connector of the fuel injector of engine
Voltage and second voltage;
First-order difference module, it determines first-order difference based on the difference of the first voltage and second voltage;
Second differnce module, it determines the second differnce between the first-order difference and the previous value of the first-order difference;
Third order difference module, it determines the third order difference between the second differnce and the previous value of the second differnce;
Parameter determination module, it determines the minimum value of the third order difference and the maximum of the third order difference;
Pulsewidth module, it determines what will be applied for fuel injection event to the fuel injector based on desired fuel quality
Initial pulsewidth;
Module is adjusted, its described minimum value and maximum based on the third order difference adjusts the initial pulsewidth, to produce
Final pulsewidth;And
Injector driver module, its be based on the final pulsewidth and for the fuel injection event to the fuel injector
Optionally apply power.
2. Fuel Control System according to claim 1, wherein:
The minimum value and maximum of the parameter determination module based on the third order difference open Periodic Compensation value come definite;
The parameter determination module determines to close Periodic Compensation value based on the minimum value of the third order difference;And
The adjustment module adjusts the initial pulsewidth based on the closing Periodic Compensation value and the opening Periodic Compensation value,
To produce the final pulsewidth.
3. Fuel Control System according to claim 2, wherein:
The parameter determination module is based on the pulse terminated in the injector driver module for previous fuel injection event
When first time and determine the combustion corresponding to the cycle between the second time of the minimum value of the third order difference
The closing cycle of material ejector;
The closing cycle of the parameter determination module based on the fuel injector and the predetermined difference for closing the cycle determine
The closing periodic increment of the fuel injector;And
The parameter determination module determines the closing Periodic Compensation value based on the closing periodic increment.
4. Fuel Control System according to claim 3, wherein:
The final pulsewidth of the parameter determination module based on the previous fuel injection event and for the previous fuel
Injection events provide the pressure to the fuel of the fuel injector to determine to close period modulation value;And
The parameter determination module is based further on the closing period modulation value to determine the closing Periodic Compensation value.
5. Fuel Control System according to claim 2, wherein:
The difference of the minimum value and maximum of the parameter determination module based on the third order difference determines fuel spray
The opening amplitude of emitter;
The parameter determination module determines the predetermined pulse width for previous fuel injection event based on the opening amplitude;
The parameter determination module based on the final pulsewidth for the previous fuel injection event with for described previous
The difference of the predetermined pulse width of fuel injection event determines the opening periodic increment of the fuel injector;And
The parameter determination module determines the opening Periodic Compensation value based on the opening periodic increment.
6. Fuel Control System according to claim 5, wherein:
The final pulsewidth of the parameter determination module based on the previous fuel injection event and for the previous fuel
Injection events provide the pressure to the fuel of the fuel injector to determine to open period modulation value;And
The parameter determination module is based further on the opening period modulation value to determine the opening Periodic Compensation value.
7. Fuel Control System according to claim 1, further includes:
Four order difference module, it determines the Four order difference between the third order difference and the previous value of the third order difference,
Wherein described injector driver module is based on the third order difference and the Four order difference is selected to the fuel injector
Apply power to selecting property.
8. Fuel Control System according to claim 7, wherein:
The parameter determination module determines the minimum of the third order difference based on the first time zero passage of the Four order difference
Value;And
The parameter determination module determines the maximum of the third order difference based on second of zero passage of the Four order difference
Value.
9. a kind of fuel control method for vehicle, including:
Measure the first voltage and second voltage at the first electric connector and the second electric connector of the fuel injector of engine;
First-order difference is determined based on the difference of the first voltage and second voltage;
Determine the second differnce between the first-order difference and the previous value of the first-order difference;
Determine the third order difference between the second differnce and the previous value of the second differnce;
Determine the minimum value of the third order difference and the maximum of the third order difference;
The initial pulsewidth for determining to the fuel injector to apply for fuel injection event based on desired fuel quality;
The minimum value and maximum based on the third order difference adjust the initial pulsewidth, to produce final pulsewidth;With
And
Power is optionally applied to the fuel injector for the fuel injection event based on the final pulsewidth.
10. fuel control method according to claim 9, further includes:
The minimum value and maximum based on the third order difference open Periodic Compensation value come definite;
Determine to close Periodic Compensation value based on the minimum value of the third order difference;And
The initial pulsewidth is adjusted based on the closing Periodic Compensation value and the opening Periodic Compensation value, with described in producing most
Whole pulsewidth.
11. fuel control method according to claim 10, further includes:
Based on the first time when terminating the pulse for previous fuel injection event and the institute corresponding to the third order difference
Cycle between the second time for stating minimum value determines the closing cycle of the fuel injector;
The closing cycle and the predetermined difference for closing the cycle based on the fuel injector determine the fuel injector
Close periodic increment;And
The closing Periodic Compensation value is determined based on the closing periodic increment.
12. fuel control method according to claim 11, further includes:
The final pulsewidth based on the previous fuel injection event and provided for the previous fuel injection event to institute
The pressure of the fuel of fuel injector is stated to determine to close period modulation value;And
The closing period modulation value is based further on to determine the closing Periodic Compensation value.
13. fuel control method according to claim 10, further includes:
The difference of the minimum value and maximum based on the third order difference determines the opening amplitude of the fuel injector;
Predetermined pulse width for previous fuel injection event is determined based on the opening amplitude;
Based on the final pulsewidth for the previous fuel injection event and the institute for the previous fuel injection event
The difference of predetermined pulse width is stated to determine the opening periodic increment of the fuel injector;And
The opening Periodic Compensation value is determined based on the opening periodic increment.
14. fuel control method according to claim 13, further includes:
The final pulsewidth based on the previous fuel injection event and provided for the previous fuel injection event to institute
The pressure of the fuel of fuel injector is stated to determine to open period modulation value;And
The opening period modulation value is based further on to determine the opening Periodic Compensation value.
15. fuel control method according to claim 9, further includes:
Determine the Four order difference between the third order difference and the previous value of the third order difference;And
Power is optionally applied to the fuel injector based on the third order difference and the Four order difference.
16. fuel control method according to claim 15, further includes:
The minimum value of the third order difference is determined based on the first time zero passage of the Four order difference;And
The maximum of the third order difference is determined based on second of zero passage of the Four order difference.
17. a kind of fuel control method for vehicle, including:
Measure the first voltage and second voltage at the first electric connector and the second electric connector of the fuel injector of engine;
First derivative is determined based on the difference of the first voltage and second voltage;
Previous value based on the first derivative and the first derivative determines second dervative;
Previous value based on the second dervative and the second dervative determines three order derivatives;
Determine the minimum value of three order derivative and the maximum of three order derivative;
The initial pulsewidth for determining to the fuel injector to apply for fuel injection event based on desired fuel quality;
The initial pulsewidth is adjusted based on the minimum value and maximum of three order derivative, to produce final pulsewidth;With
And
Power is optionally applied to the fuel injector for the fuel injection event based on the final pulsewidth.
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US14/242,058 US9708998B2 (en) | 2014-04-01 | 2014-04-01 | System and method for improving fuel delivery accuracy by detecting and compensating for fuel injector characteristics |
US14/242058 | 2014-04-01 |
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US7525234B2 (en) * | 2003-09-23 | 2009-04-28 | Delphi Technologies, Inc. | Drive circuit for an injector arrangement |
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JPS60219433A (en) * | 1984-04-13 | 1985-11-02 | Mitsubishi Motors Corp | Electronic control fuel injecting device |
JPS60256556A (en) * | 1984-05-31 | 1985-12-18 | Japan Electronic Control Syst Co Ltd | Assembly regulator for electronic control fuel injector |
US5771861A (en) * | 1996-07-01 | 1998-06-30 | Cummins Engine Company, Inc. | Apparatus and method for accurately controlling fuel injection flow rate |
DE102008001044A1 (en) * | 2008-04-08 | 2009-10-15 | Robert Bosch Gmbh | Actuator controlling method for control device of internal-combustion engine of motor cycle, involves electrically controlling coil using signal or another signal, and operating armatures using latter signal during control |
US9074552B2 (en) | 2012-06-27 | 2015-07-07 | GM Global Technology Operations LLC | Fuel injector closing timing adjustment systems and methods |
EP2685074B1 (en) | 2012-07-13 | 2018-04-18 | Delphi Automotive Systems Luxembourg SA | Fuel injection control in an internal combustion engine |
US9458789B2 (en) | 2014-04-01 | 2016-10-04 | GM Global Technology Operations LLC | Missed fuel injection diagnostic systems and methods |
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US9683510B2 (en) | 2014-04-01 | 2017-06-20 | GM Global Technology Operations LLC | System and method for improving fuel delivery accuracy by learning and compensating for fuel injector characteristics |
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US7525234B2 (en) * | 2003-09-23 | 2009-04-28 | Delphi Technologies, Inc. | Drive circuit for an injector arrangement |
CN101397962A (en) * | 2007-09-14 | 2009-04-01 | 德尔菲技术公司 | Injection control system |
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