CN106907260A - Method for controlling fuel injection in motor vehicles explosive motor - Google Patents

Method for controlling fuel injection in motor vehicles explosive motor Download PDF

Info

Publication number
CN106907260A
CN106907260A CN201611201002.2A CN201611201002A CN106907260A CN 106907260 A CN106907260 A CN 106907260A CN 201611201002 A CN201611201002 A CN 201611201002A CN 106907260 A CN106907260 A CN 106907260A
Authority
CN
China
Prior art keywords
additional fuel
pressure
fuel quality
special angle
burn cycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201611201002.2A
Other languages
Chinese (zh)
Other versions
CN106907260B (en
Inventor
M·潘奇罗利
G·迪维耶斯特
M·扎诺蒂
G·杰内罗西
E·布鲁尼奥尼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Europe SpA
Original Assignee
Magneti Marelli SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Magneti Marelli SpA filed Critical Magneti Marelli SpA
Publication of CN106907260A publication Critical patent/CN106907260A/en
Application granted granted Critical
Publication of CN106907260B publication Critical patent/CN106907260B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration
    • 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
    • F02D41/405—Multiple injections with post injections
    • 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
    • F02D2200/021—Engine temperature
    • 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
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0406—Intake manifold pressure
    • 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
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • 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
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • 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
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/703—Atmospheric pressure
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/047—Taking into account fuel evaporation or wall wetting
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
    • 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
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration

Landscapes

  • 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)

Abstract

Method of the one kind for controlling fuel injection in motor vehicles explosive motor (1), it is comprised the following steps：Signal of the capture from the pressure sensor (21) accommodated along supply line (6)；Multiple special angle (the θ being included in burn cycle are determined in the initial setting stage1, θ2, θ3)；For each special angle (θ1, θ2, θ3) for, the pressure value detected by pressure sensor (21) is compared with corresponding reference pressure value；And based on for each special angle (θ1, θ2, θ3) for the comparing between the pressure value detected by pressure sensor (21) and corresponding reference pressure value come determine the fuel mass that will be sprayed with compensate during burn cycle occur possible transition.

Description

Method for controlling fuel injection in motor vehicles explosive motor
Technical field
The present invention relates to a kind of method for controlling fuel injection in motor vehicles explosive motor.
Background technology
The motor vehicles of latest generation generally include such as single-cylinder four-stroke explosive motor.
Explosive motor includes injector, preferred magnetic injectors, and it is connected to and is provided with the fuel of supply pump and supplies back Road, the supply pump extracts fuel from fuel tank and supplies fuel to the injector of single cylinder upstream under stress. During induction stroke, fuel is injected into the combustion chamber of cylinder, and in subsequent expansion stroke, the electrode of spark plug is produced The spark that life is lighted a fire to air-fuel mixture in cylinder, so as to the Actual combustion for starting to produce temperature and pressure to rise.
Cylinder is connected to the supply line of oxidation fluid flowing in it by corresponding inlet valve, and the supply line prolongs The inlet manifold limited substantially along supply line is extended through, and cylinder is connected to blast pipe by corresponding exhaust valve Road.
Adjusted into the control member for flowing through change supply line channel cross-section of the oxidation fluid of explosive motor Section.Control member includes：Gate elements, the gate elements be at least partially recessed into supply line and be suitable to based on its Supply line position interior in itself hinders the mass flowrate of oxidation fluid；And actuation means, it is suitable to move gate elements To control the mass flowrate of oxidation fluid.
The gate footstep lever of motor vehicles passes through at least one metal bowden-type cable (Bowden type cable) and internal combustion The control member connection of engine.Gate footstep lever can rotate to corresponding from the corresponding stand of driving torque with holding idling In the maximum open position of peak torque；And from maximum open position rotate to stand on the contrary.
Finally, pressure sensor is accommodated in the downstream of gate elements along supply pipe, and is connected to control unit, should Control unit monitors the operation of explosive motor and is designed to control injector, is based particularly on and is detected by pressure sensor To pressure value control injector.During the normal operating of explosive motor, control unit is actually configured as being based on The pressure value that is detected by pressure sensor and the rotating speed of explosive motor determine fuel mass to be injected.Specifically, By the signal from pressure sensor, the average pressure value in supply line is determined and for determining for each burn cycle For will be injected into pressure ratio between the air pressure of the fuel mass in cylinder.Due to using average in supply line Pressure value, it is clear that above-mentioned strategy does not allow to take into account very quick transition, driver dashes forward in very quick transition So apply moment of torsion on gate footstep lever, so as to cause the pressure suddenly change in supply line；In these cases, actually by The fuel mass that can be ejected into cylinder in the air that higher amount is retained in cylinder is insufficient to assure that target mixture The situation of intensity.
The content of the invention
Therefore, it is an object of the invention to provide a kind of side for controlling fuel injection in motor vehicles explosive motor Method, the method overcomes the defect of prior art, while low cost and easy to implement.
It is described interior according to the present invention, there is provided a kind of method for controlling fuel injection in motor vehicles explosive motor Burn engine includes at least one cylinder, and the cylinder receives oxidation fluid, that is, comes from supply line by corresponding inlet valve From outside fresh air；Respective injectors for the fuel and the pressure sensor along supply line receiving； For each burn cycle, the described method comprises the following steps：
Signal of the capture from the pressure sensor；
Average pressure is determined based on the signal from the pressure sensor；And
The combustion that will be injected into the cylinder is calculated based on the rotating speed of the average pressure and the explosive motor Material quality；
At least three special angles being included in the burn cycle are determined in the initial setting stage；
For each special angle, the pressure value that will be detected by the pressure sensor and corresponding reference pressure Value is compared；
Based on for the first special angle the pressure value detected by the pressure sensor and it is corresponding ginseng The the first additional fuel quality for examining the comparing between pressure value to determine to be sprayed during current combustion is circulated；
Based on for the second special angle the pressure value detected by the pressure sensor and it is corresponding ginseng The comparing between pressure value is examined to determine the second additional fuel quality that will be sprayed during subsequent burn cycle；And
Wherein only in the case of the second additional fuel quality is null, based on for the 3rd special angle in institute The comparing between the pressure value and corresponding reference pressure value that pressure sensor detects is stated to determine in subsequent burn cycle The 3rd additional fuel quality that period will spray.
Brief description of the drawings
The present invention is described now with reference to the accompanying drawing for showing non-limiting example, wherein：
- Fig. 1 is adapted for being provided with the internal combustion hair of the motor vehicles for implementing the control unit according to control method of the present invention The schematic diagram of motivation；And
- Fig. 2 to Fig. 4 is shown in three kinds of different scenes and according to the pressure according to control method of the present invention and general The trend of the fuel quantity to be sprayed.
Specific embodiment
In Fig. 1, the overall explosive motor for representing motor vehicles of reference 1, such as single-cylinder four-stroke internal-combustion engine Machine.
Explosive motor 1 includes injector 2, preferably magnetic injectors (known type and do not describe in detail), and it will Fuel injection is in the supply line 6 of the upstream of cylinder 3.During induction stroke, fuel is injected into the combustion chamber of cylinder 3, And in subsequent expansion stroke, the electrode of spark plug produces the spark lighted a fire to the air-fuel mixture in cylinder 3, from And start the Actual combustion for producing temperature and pressure to rise.
Cylinder 3 accommodates piston 4, and piston 4 is mechanically connected to motor drive shaft 5 by connecting rod, for by by the burning in cylinder 3 Produced power is delivered to motor drive shaft 5 itself.
Cylinder 3 is connected to the supply line 6 of oxidation fluid flowing in it, the supply line by corresponding inlet valve 7 The inlet manifold 6* of explosive motor 1 is extended through, and cylinder 3 is connected to discharge duct 8 by corresponding exhaust valve 9.
Supply line 6 is in outside reference pressure patmWith external reference temperature TatmIt is lower to receive from outside oxidation fluid, That is fresh air.Additionally, the oxidation fluid into explosive motor 1 flows through control member 11 to adjust, the control Component 11 is arranged on the downstream of filter 10 and changes the channel cross-section of supply line 6.Inlet manifold 6* is substantially along confession Pipeline 6 is answered to be defined between inlet valve 7 and control member 11.
Control member 11 includes gate elements 12, and gate elements 12 are at least partially recessed into supply line 6, and are fitted The flowing of oxidation fluid is hindered in the position based on it in the supply line 6 itself；And actuation means 13, it is suitable to movement Gate elements 12 are controlling the mass flowrate of oxidation fluid.
The gate footstep lever (not shown) of motor vehicles is connected to internal-combustion engine by least one metal bowden-type cable 14 The control member of machine, the metal bowden-type cable 14 is inserted into the end of gate elements 12, and the end is arranged with partly In the supply line 6 and the end that is promoted towards stand of the spring 15 that is reset is relative, stand corresponds to oxidation stream The channel cross-section for being substantially equal to zero that body (air) passes through supply line 6 to explosive motor 1.Gate footstep lever can from holding The corresponding stand of driving torque of idling rotates to the maximum open position corresponding to peak torque；And opened from maximum Position rotates to stand.Back-moving spring 15 pushes gate footstep lever to stand, therefore driver must be in gate footstep lever Upper applying moment of torsion is so that gate footstep lever itself is moved from stand.
In other words, the flow area of the supply for controlling to enter explosive motor 1 of supply line 6 can be in minimum value (corresponding to the stand) changes and maximum between；And change between a minimum value and a maximum value.
Injector 2 is connected to fuel supply loop, and the fuel supply loop is provided with pump 16, and pump 16 is extracted from fuel tank 17 Fuel and the fuel of pressurization is supplied in injector 2 by feed path 18.
The waste gas produced by burning is supplied to gas extraction system by discharge duct 8, and gas extraction system is by the gas produced by burning It is discharged into air and generally includes at least one catalyst converter 19.
Finally, explosive motor 1 is provided with starter motor (not shown, to be known type, and do not describe in detail), its Mechanical energy of the electrical power conversion that will be flowed out from battery for needed for starting explosive motor 1 is allowed, and it is allowed in set up procedure Period reaches minimum revolution (rpm).Starter motor is by the electro-motor that is electrically activated by firing key and by starter motor The electromagnet for being connected to battery is formed.It with the absorption magnitude of current very high is cost that starter motor has during set up procedure And there is the characteristic of a large amount of moments of torsion.
Explosive motor 1 is provided with control unit 20, the operation of its monitoring explosive motor 1, and is designed to carry out Control, particularly controls injector 2 and actuation means 13.Finally, pressure sensor 21 is accommodated in gate along supply line 6 The downstream of element 12 and it is connected to control unit 20.
The strategy implemented by control unit 20 is described below, the strategy is used to control by injector 2 to the combustion in cylinder 3 Material injection.
During the normal operating of explosive motor 1 (in a stationary situation), control unit 20 is configured as being based on by pressing Pressure value that force snesor 21 is detected and the rotating speed n of explosive motor 1 determine the fuel mass flow rate that will be sprayedAs following article is preferably described.Specifically, control unit 20 was configured as in each complete burn cycle phase Between average pressure value p is determined by the signal provided by pressure sensor 21m.As it is known, by four strokes Complete burn cycle is realized in succession, and at the end of stroke, complete motor drive shaft 5 two weeks rotate, by the angle equal to 720 °, Wherein air inlet, compression, expansion and exhaust stroke are carried out one by one.In each burn cycle, corresponding to burn cycle The average pressure value p that is detected by pressure sensor 21 of 720 ° of periodsmIt is then stored in the storage buffering of control unit 20 In device.According to preferred alternative solution, to the pressure instantaneous value that is detected by pressure sensor 21 corresponding to burn cycle Sampled under restriction angle in 720 °.
Then average pressure value p is passed throughmWith atmospheric pressure patmBetween relation determine pressure ratio RP.Atmospheric pressure patm Also detected by pressure sensor 21；Specifically, atmospheric pressure patmIt is confirmed as being passed by pressure when explosive motor 1 is static The average value of multiple pressure values that sensor 21 is detected.
The rotating speed n of pressure ratio RP and explosive motor 1 is then based on to determine the fuel mass flow rate that will be sprayedAccording to preferred alternative solution, it is then based on some parameters to compensate the fuel mass flow rate that will be sprayed The temperature T of the parameter such as airair, cooling liquid temperature TH2OWith by atmospheric pressure patmThe height of expression.
In the following, it is described that the strategy implemented by control unit 20, with transient condition (that is, for example when driver is prominent So place a torque on when on gate footstep lever) control by injector 2 to the fuel injection in cylinder 3.In Fig. 2 to Fig. 4, its Middle PCThe trend of the pressure in supply line 6 in current combustion circulation is represented, and P represents that storage (is deposited in previous burn cycle Storage) reference pressure in control unit 20 trend.
First, in the initial setting stage of control unit 20, it is determined that using θ in from Fig. 2 to Fig. 41、θ2And θ3Represent Three special angles.
Experiment proof, under transient condition, is suitable to special angle θ1、θ2And θ3Values below allow optimization to by injection Control of the device 2 to the fuel injection in cylinder 3：
-θ1" intersection " (during i.e. from steps of exhausting to the air inlet step of next burn cycle) top dead centre TDC it Afterwards from 40 ° to 50 ° in the range of, and open while there are inlet valve 7 and exhaust valve 9, this allows to utilize in exhaust stroke In the inertia of fuel gas that is escaped by exhaust valve 9, so as to during induction stroke by inlet valve 7 by air from air inlet discrimination Pipe 6* is drawn into cylinder 3；
-θ2After " intersection " the top dead centre TDC from 100 ° to 110 ° in the range of；And
-θ3After the lower dead center BDC at the end of induction stroke from 130 ° to 140 ° in the range of.
Pressure sensor 21 is configured as detection in special angle θ1The pressure value at place, so as to will be in special angle θ1Place's inspection The current pressure values P for measuring1rWith in previous burn cycle in special angle θ1Place detects and stores in control unit 20 Pressure value p1It is compared.Then calculate in special angle θ1The current pressure values P that place detects1rWith in previous burn cycle In in special angle θ1Place detects and stores pressure value p in control unit 201Between difference DELTA pθ1.Wherein with exhausted The difference DELTA p represented valueθ1Less than tolerance TV1In the case of, then need not implement any correction strategy with by injector 2 In injecting fuel into cylinder 3.Conversely, wherein with the difference DELTA p of absolute value representationθ1More than tolerance TV1In the case of, then In needing to implement correction strategy to inject fuel into cylinder 3 by injector 2, because there occurs transition, that it changes pressure Trend (such as by fastish mode by the rotation of gate footstep lever come regulating gate element 12).Specifically, when With the difference DELTA p of absolute value representationθ1More than tolerance TV1When, it means that occur at the drain steps of previous burn cycle Transition (for example, throwing open by gate footstep lever) (such as at the point for being indicated with T in fig. 2), the transition has changed Pressure trend.
In this case, in order to compensate fast transient, it is necessary to spray additional fuel quality
By difference DELTA pθ1With the rotating speed n and the temperature T of cooling liquid for being based respectively on explosive motor 1H2OTwo for determining Product between component calculates the additional fuel qualityOnce identify special angle θ1In " intersection " top dead centre After TDC from 40 ° to 50 ° in the range of, then special angle θ1It is included therein generation fuel injection to the air inlet in cylinder 3 In stroke.
Specifically, according to the first alternative solution, special angle θ1Including in the intake stroke, but the combustion in cylinder 3 At the point that material injection has been completed.In this case, control unit 20 is configured as the opening of guiding fuel injection device 2, to spray Penetrate additional fuel quality
According to another alternative solution, special angle θ1The fuel injection in induction stroke and in cylinder 3 is included in still to exist Carry out point at.In this case, control unit 20 is configured as guiding fuel injection device 2 and keeps its opening additional to spray Fuel mass
It is important that it is however emphasized that in this case, by the additional fuel quality sprayed during current combustion is circulatedCompensate, it is equal to additional fuel quality
In checking special angle θ1Afterwards, pressure sensor 21 is configured as detection special angle θ2The pressure value at place, and will In special angle θ2The current pressure values P that place detects2rWith in previous burn cycle in special angle θ2Place detects and deposits Storage pressure value p in control unit 202It is compared.Then calculate in special angle θ2The current pressure values P that place detects2r With in previous burn cycle in special angle θ2Place detects and stores pressure value p in control unit 202Between difference Δpθ2.Wherein with the difference DELTA p of absolute value representationθ2Less than tolerance TV2In the case of, then need not implement any amendment plan In slightly to inject fuel into cylinder 3 by injector 2.Conversely, wherein with the difference DELTA p of absolute value representationθ2More than tolerance Value TV2In the case of, then in needing to implement correction strategy to inject fuel into cylinder 3 by injector 2, because there occurs wink Become, the trend that the transition changes pressure (for example guides lock by fastish mode by the rotation of gate footstep lever Gating element 12).
Specifically, if with the difference DELTA p of absolute value representationθ1Less than tolerance TV1And difference DELTA pθ2More than tolerance TV2 (condition shown in Fig. 3), it means that there occurs transition (for example, by air throttle at the induction stroke of current combustion circulation Bar throws open or discharges) (such as at the point for being indicated with T ' in figure 3), the transition has changed pressure trend.
In this case, in order to compensate the fast transient occurred in the induction stroke of current combustion circulation, it is necessary to spray Penetrate additional fuel quality
By difference DELTA pθ2With the rotating speed n and the temperature T of cooling liquid for being based respectively on explosive motor 1H2OTwo for determining Product between component calculates the additional fuel quality
Due to identifying special angle θ2After " intersection " the top dead centre TDC from 100 ° to 110 ° in the range of, then institute State special angle θ2Including in the compression stroke during previous burn cycle；In other words, in cylinder 3 is injected fuel into When step has been completed.
In this case, rather than the injection additional fuel matter during current combustion is circulated during latter burn cycle AmountSpecifically, determine the value of angle at the end of injection EOI (End-of-Injection) in the setting stage, and deposited Storage is in control unit 20.As known for indirect injection, given the fuel mass that will be sprayed and Once in the case of defining angle at the end of injection EOI, angle at the beginning of injection SOI (Start- are determined by injector model of-Injection).Therefore, in the current situation, based on being calculated with speed density model (Speed Density Model) Fuel mass and additional fuel qualityOr additional fuel quality(as following article is preferably described) calculates injection and opens Beginning angle SOI.
According to preferred alternative solution, in order to spray additional fuel qualityThe value of angle at the end of injection EOI keeps permanent It is fixed, and change the value of angle at the beginning of injection SOI；I.e. injector 2 is relative to the angle at the beginning of injection for calculating in a stationary situation SOI is directed to open in advance.
According to another alternative solution, in order to spray additional fuel qualityIn the case of impossible spray fuel, in advance The value of the angle at the beginning of injection SOI that the phase calculates in a stationary situation, angle at the beginning of injection SOI keeps constant, and injection terminates The value of angle EOI changes；In other words, injector 2 is controlled as being stayed open relative to the angle with reference to angle at the end of injection EOI For more time.
By additional fuel qualityCompensated (in special angle θ2After place is verified), will be in special angle θ1The transition that occurs afterwards and in special angle θ1Occur before but in special angle θ1The pressure trend at place do not produce it is any can The transition of sensation influence is taken into account.
It is worth emphasizing that in this case, by the additional fuel quality sprayed during next burn cycle Compensate, it is equal to additional fuel quality
Finally, special angle θ is being demonstrated2Afterwards, pressure sensor 21 is configured as detection in special angle θ3The pressure at place Force value, and will be in special angle θ3The current pressure values P that place detects3rWith during previous burn cycle in special angle θ3Place Detect and store pressure value p in control unit 203It is compared.Then calculate in special angle θ3What place detected Current pressure values P3rWith during previous burn cycle in special angle θ3Place detects and stores pressure in control unit 20 Force value p3Between difference DELTA pθ3.With the difference DELTA p of absolute value representationθ3Less than tolerance TV3In the case of, then need not be real Apply any correction strategy injected fuel into by injector 2 in cylinder 3.Conversely, with the difference DELTA p of absolute value representationθ3 More than tolerance TV3In the case of, then the correction strategy for implementing to be injected fuel into cylinder 3 by injector 2 is needed, because Generation has changed the transition (for example, fairly quickly guiding shutter elements 12 by the rotation of gate footstep lever) of pressure trend.
Specifically, with the difference DELTA p of absolute value representation in current combustion circulationθ1Less than tolerance TV1While With the difference DELTA p of absolute value representationθ2Less than tolerance TV2And with the difference DELTA p of absolute value representationθ3More than corresponding tolerance TV3In the case of (condition shown in Fig. 4), it means that there occurs transition (for example, by gate footstep lever throw open or Release), the transition has changed the pressure trend in the compression stroke of current combustion circulation, and in special angle θ2Place Not can recognize that (for example in fig. 4 use T " indicate point at).
In this case, in order to compensate the special angle θ for example in the compression stroke of current combustion circulation2Send out afterwards Raw fast transient is, it is necessary to spray additional fuel quality
By difference DELTA pθ3With the rotating speed n and the temperature T of cooling liquid for being based respectively on explosive motor 1H2OIdentified two Product between individual component calculates the additional fuel quality
Due to identifying scopes of the special angle θ 3 at the end of induction stroke after lower dead center BDC from 130 ° to 140 ° It is interior, the special angle θ3It is included in the compression stroke of previous burn cycle；In other words, in fuel injection to cylinder 3 When step has been completed.
According to preferred alternative solution, in order to spray additional fuel qualityThe value of angle at the end of injection EOI keeps permanent It is fixed, and change the value of angle at the beginning of injection SOI；I.e. injector 2 is directed with relative to the injection for calculating in a stationary situation Start angle SOI to open in advance.
According to another alternative solution, in order to spray additional fuel qualityThe value of angle at the beginning of injection SOI keeps constant, And change the value of angle at the end of injection EOI；In other words, injector 2 is controlled as being protected relative to reference to angle at the end of injection EOI Hold the opening longer time.
By additional fuel qualityCompensated (in special angle θ3After place is verified), will be in special angle θ2The transition that occurs afterwards and in special angle θ2Occur before but in special angle θ2The pressure trend at place do not produce it is any can The transition of sensation influence is taken into account.
It is worth emphasizing that in this case, by the additional fuel quality sprayed during next burn cycle Compensate, it is equal to additional fuel quality
Obviously, with the difference DELTA p of absolute value representation in current combustion circulationθ2More than tolerance TV2In the case of, with exhausted The difference DELTA p represented valueθ3Also corresponding tolerance TV will be inevitably greater than3.In this case, if that is, with absolute It is worth the difference for representingθ2More than tolerance TV2(condition shown in Fig. 4), then additional fuel qualityEqual to zero.With this side Formula, transition compensation is simply by spraying additional fuel qualityMode obtain, so as not to repeat consider same transition, should The influence of transition is in special angle θ2Place and special angle θ3Place is all perceptible.
Equally it is emphasized that the compensation in next burn cycle passes through additional fuel qualityOccur, this is attached Fueling massAlternately it is equal to additional fuel qualityOr additional fuel quality
According to preferred alternative hereto, TV1、TV2、TV3It is to determine and store in control unit 20 in the setting stage Steady state value different from each other.
Obviously, it may occur however that following situations, wherein the influence of the same transition in by being circulated in current combustion, cause with The difference DELTA p of absolute value representationθ1More than tolerance TV1While the difference with absolute value representation in previous burn cycle Δpθ2And/or with the difference DELTA p of absolute value representationθ3More than corresponding tolerance TV2、TV3.It may happen that same transition In the special angle θ of current combustion circulation2And/or special angle θ3Place produces obvious influence on pressure trend, and still may be used With in the special angle θ of next burn cycle1Place finds the influence.
In such a case it is necessary to the additional fuel quality that current combustion is circulated(it is equal to additional fuel quality) Reduce by an amount, the amount is equal to the additional fuel quality of previous burn cycle(itself so additional fuel quality can be equal toOr additional fuel quality)。
Carry out transition compensation, so as not to repeat to consider same transition, the influence of the transition current combustion circulate it is specific Angle, θ1Place and the special angle θ in previous burn cycle2Place or special angle θ3Place is all significant.
In this case, the additional fuel quality of current combustion circulationCorresponding to additional fuel qualityIt leads to Cross following calculate：Will be in difference DELTA pθ1With the rotating speed n and the temperature T of cooling liquid for being based respectively on explosive motor 1H2OReally Product between two fixed components reduces by a value, and the value is equal to the additional fuel quality during previous burn cycle(itself so additional fuel quality can be equal toOr additional fuel quality)。
Additionally, in the case where injector 2 is not sufficiently close together inlet valve 7, it may occur however that such situation：Part of fuel Into the inside of cylinder 3 and close to the upstream of inlet valve 7 and can not be close to during the induction stroke of current combustion circulation Valve 7 and be gathered in supply line 6 and enter inside cylinder 3 with only in next burn cycle.
It is gathered in supply line 6 with only in next burn cycle close to the upstream of inlet valve 7 and near inlet valve 7 Part of fuel inside middle entrance cylinder 3 is with fuel distributed massTo represent.
It is gathered in supply line 6 with only in next combustion in view of close to the upstream of inlet valve 7 and near inlet valve 7 It is the additional fuel quality sprayed during current combustion is circulated to burn the part of fuel entered inside cylinder 3 in circulation(its etc. In additional fuel quality) a part.In this case, fuel distributed massBy additional fuel qualityWith (in average pressure value pmWith atmospheric pressure patmBetween) multiplying between the function of the rotating speed n of pressure ratio RP and explosive motor 1 Accumulate to calculate.
In this case it is necessary to will in next burn cycle spray additional fuel quality (itself so can be equal to attached Fueling massOr additional fuel quality) reducing by a value, the value is equal to fuel distributed mass
Further, it is necessary to the additional fuel quality sprayed in being circulated in current combustion(it is equal to additional fuel quality ) reducing by a value, the value is equal to the fuel distributed mass during previous burn cycleDuring previous burn cycle Fuel distributed massCalculated by following：Additional fuel quality in previous burn cycle(in mean pressure Force value pm_i-1With atmospheric pressure patm_i-1Between) pressure ratio RPi-1With the rotating speed of the explosive motor 1 in previous burn cycle ni-1Function between product.
Up to the present described all situations can be represented by following formula group.Specifically, burnt for each The natural fuel mass flowrate that will be ejected into inside cylinder 3 for circulation iFrom three component sums：
It is the fuel mass flow rate determined by speed density model；
It is additional fuel mass flowrate；And
It is additional fuel mass flowrate.
Then by below equation for each burn cycle i, calculate by combustion determined by speed density model Material mass flowrate
RP is in average pressure value pmWith atmospheric pressure patmBetween pressure ratio RP；
N is the rotating speed of explosive motor 1；
TairIt is air themperature；And
TH2OIt is the temperature of cooling liquid.
Additional fuel mass flowrate for each burn cycle iAnd then calculated by below equation：
It is the additional fuel mass flowrate calculated in previous burn cycle；
It is the fuel distributed mass calculated in previous burn cycle；And
It is in special angle θ1Locate the additional fuel mass flowrate for calculating.
Additional mass flow rateIt is calculated as follows：
Δpθ1It is special angle θ1The pressure differential at place；
N is the rotating speed of explosive motor 1；And
TH2OIt is the temperature of cooling liquid.
In formula [3], the fuel distributed mass calculated in previous burn cycleInstead of it is determined as follows：
It is the additional fuel mass flowrate in previous burn cycle；And
RPi-1,ni-1It is the rotating speed of pressure ratio in previous burn cycle and explosive motor 1.
Additional fuel mass flowrateInstead of determined by below equation：
Wherein：
It is fuel distributed mass；
It is in special angle θ2Locate the additional fuel mass flowrate for calculating；
It is in special angle θ3Locate the additional fuel mass flowrate for calculating.
And then, additional mass flow rateIt is calculated as follows：
Δpθ2It is in special angle θ2The pressure differential at place；
N is the rotating speed of explosive motor 1；And
TH2OIt is the temperature of cooling liquid.
And additional mass flow rateIt is calculated as follows：
Δpθ3It is in special angle θ3The pressure differential at place；
N is the rotating speed of explosive motor 1；
TH2OIt is the temperature of cooling liquid；And.
K is coefficient, its additional fuel mass flowrate in same burn cycleTaken equal to 1 in the case of more than zero Value；Otherwise it is null value.
Finally, in formula [6], fuel distributed massCalculated by below equation：
It is additional fuel mass flowrate；And
RP, n are the rotating speed of pressure ratio in previous burn cycle and explosive motor 1.
The method of control injection as described above has various advantages.Specifically, although in terms of cost be favourable (its Actually and need not include additional component or sensor), its low cost and easy to implement, and control unit 20 will not be caused Computation burden increase, it also allows to be readily compensated for very quick transition, and wherein driver is suddenly on gate footstep lever Apply moment of torsion and the pressure suddenly change for causing in supply line 6.

Claims (13)

1. one kind is used for the method for controlling fuel injection in explosive motor (1), and the explosive motor (1) includes：At least one Individual cylinder (3), the cylinder (3) receives oxidation fluid from supply line (6) by corresponding inlet valve (7), i.e., from outside Fresh air；Respective injectors (2) for the fuel and the pressure sensor along the supply line (6) receiving (21)；For each burn cycle, the described method comprises the following steps：
Signal of the capture from pressure sensor (21)；
Average pressure (P is determined based on the signal from pressure sensor (21)m)；And
Based on average pressure (Pm) and the rotating speed (n) of explosive motor (1) calculate the fuel matter that will be injected into cylinder (3) Amount
Methods described is characterised by that the method is further comprising the steps of：
At least three special angle (θ being included in the burn cycle are determined in the initial setting stage1, θ2, θ3)；
For each special angle (θ1, θ2, θ3) for, the pressure value (p that will be detected by pressure sensor (21)1r, p2r, p3r) With corresponding reference pressure value (p1, p2, p3) be compared；
For the first special angle (θ1) for, based in the pressure value (p detected by pressure sensor (21)1r) with it is corresponding Reference pressure value (p1) between comparing determine the first additional fuel quality that will spray during current combustion is circulated
For the second special angle (θ2) for, based in the pressure value (p detected by pressure sensor (21)2r) with it is corresponding Reference pressure value (p2) between comparing determine the second additional fuel quality that will be sprayed during subsequent burn cycleAnd
For the 3rd special angle (θ3) for, wherein only in the second additional fuel qualityIn the case of null, it is based on In the pressure value (p that pressure sensor (21) is detected3r) with corresponding reference pressure value (p3) between relatively come determine with The 3rd additional fuel quality that will be sprayed during burn cycle afterwards
2. method according to claim 1, it is characterised in that comprise the following steps：
Based on average pressure (pm) and atmospheric pressure (patm) between pressure ratio (RP) and explosive motor (1) rotating speed (n) come It is determined that the fuel mass that will be ejected into cylinder (3)And
The fuel mass that will be ejected into cylinder (3) is compensated based on some parametersThe parameter such as Air Temperature Degree (Tair), the temperature (T of cooling liquidH2O) and by atmospheric pressure (patm) represent height.
3. method as requested described in 1, it is characterised in that further comprising the steps of：
For each special angle (θ1, θ2, θ3) for, the pressure value (p that calculating is detected by pressure sensor (21)1r, p2r, p3r) with corresponding reference pressure value (p1, p2, p3) between difference (the Δ p with absolute value representationθ1, Δ pθ2, Δ pθ3)；
By with the difference (the Δ p of absolute value representationθ1, Δ pθ2, Δ pθ3) with corresponding threshold value (TV1, TV2, TV3) compared Compared with；
Only with the difference (the Δ p of absolute value representationθ1, Δ pθ2, Δ pθ3) it is more than corresponding threshold value (TV1, TV2, TV3) feelings Under condition, it is determined that the additional fuel quality that will be ejected into cylinder (3) To compensate in the burn cycle phase Between occur possible transition.
4. method according to claim 1, it is characterised in that further comprising the steps of：
For each special angle (θ1, θ2, θ3) for, the pressure value (p that calculating is detected by pressure sensor (21)1r, p2r, p3r) with corresponding reference pressure value (p1, p2, p3) between difference (Δ pθ1, Δ pθ2, Δ pθ3)；
By the difference (Δ pθ1, Δ pθ2, Δ pθ3) with the rotating speed (n) and cooling liquid for being based respectively on explosive motor (1) Temperature (TH2O) two products of component determining are the additional fuel quality that determines to be ejected into cylinder (3)To compensate possible transition.
5. method according to claim 1, it is characterised in that in order to spray the first additional fuel qualityControl spray Emitter (2) is to change the angle at the end of injection for calculating in a stationary situation (EOI).
6. method according to claim 1, it is characterised in that other injection is provided, it is attached only to spray described first Fueling mass
7. method according to claim 1, it is characterised in that also comprise the steps：Keep angle at the end of injection (EOI) Constant and change angle at the beginning of injection (SOI), to be injected in the second additional fuel quality calculated in previous burn cycleOr the 3rd additional fuel quality
8. method according to claim 1, it is characterised in that also comprise the steps：Keep angle at the beginning of injection (SOI) Constant and change angle at the end of injection (EOI), to spray the second additional fuel quality calculated in previous burn cycleOr the 3rd additional fuel quality
9. method according to claim 1, it is characterised in that the first special angle (θ1) in the top dead centre for intersecting (TDC) after from 40 ° to 50 ° in the range of；Second special angle (the θ2) intersect top dead centre (TDC) after from 100 ° To in the range of 110 °；And the 3rd special angle (θ3) at the end of induction stroke after lower dead center (BDC) from 130 ° to In the range of 140 °.
10. method according to claim 1, it is characterised in that further comprising the steps of：Will be during current combustion be circulated The the first additional fuel quality that will be sprayedReduce by an amount, the amount is equal in previous burn cycle for calculating Two additional fuel qualityOr the 3rd additional fuel quality
11. methods according to claim 1, it is characterised in that further comprising the steps of：Will be during current combustion be circulated The the first additional fuel quality that will be sprayedReduce by an abundanceThe abundanceIn view of preceding The fuel assembled in supply line (6) during one burn cycle.
12. methods according to claim 1, it is characterised in that further comprising the steps of：During subsequent burn cycle The the second additional fuel quality that will be sprayedOr the 3rd additional fuel qualityReduce an abundanceThis point Cloth amountIn view of the fuel assembled in supply line (6) during current combustion is circulated.
13. methods according to claim 11, it is characterised in that by the first additional fuel quality With in average pressure (pm, pmi-1) and atmospheric pressure (patm) between pressure ratio (RP, RPi-1) and explosive motor (1) rotating speed (n, ni-1) function between product calculate the abundance
CN201611201002.2A 2015-12-22 2016-12-22 Method for controlling fuel injection in an internal combustion engine of a motor vehicle Active CN106907260B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2015A009587A ITUB20159587A1 (en) 2015-12-22 2015-12-22 METHOD FOR THE CONTROL OF FUEL INJECTION IN AN INTERNAL MOTORCYCLE COMBUSTION ENGINE
IT102015000086442 2015-12-22

Publications (2)

Publication Number Publication Date
CN106907260A true CN106907260A (en) 2017-06-30
CN106907260B CN106907260B (en) 2021-08-20

Family

ID=55699678

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611201002.2A Active CN106907260B (en) 2015-12-22 2016-12-22 Method for controlling fuel injection in an internal combustion engine of a motor vehicle

Country Status (2)

Country Link
CN (1) CN106907260B (en)
IT (1) ITUB20159587A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110043381A (en) * 2018-01-15 2019-07-23 马涅蒂-马瑞利公司 Method for controlling the particulate loading flowed out from the particulate filter for being suitable for internal combustion engine
CN116736745A (en) * 2023-07-06 2023-09-12 碎得机械(北京)有限公司 Control method, device and system of mixing equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010056322A1 (en) * 2000-06-26 2001-12-27 Nissan Motor Co., Ltd. Enhanced multiple injection for auto-ignition in internal combustion engines
CN101418742A (en) * 2007-10-26 2009-04-29 株式会社电装 Cylinder characteristic variation sensing device
CN101900052A (en) * 2009-06-01 2010-12-01 株式会社电装 The fuel injection control system of internal-combustion engine
CN103256134A (en) * 2012-02-21 2013-08-21 福特环球技术公司 System and method for injecting fuel

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2973418B2 (en) * 1987-03-05 1999-11-08 トヨタ自動車株式会社 Method for detecting intake pipe pressure of internal combustion engine
US5584277A (en) * 1995-09-26 1996-12-17 Chrysler Corporation Fuel delivery system with wall wetting history and transient control
TWI221505B (en) * 2001-10-29 2004-10-01 Yamaha Motor Co Ltd Engine control device
JP4203983B2 (en) * 2002-03-19 2009-01-07 ヤマハ発動機株式会社 Intake negative pressure detection device for internal combustion engine
JP4321307B2 (en) * 2004-02-26 2009-08-26 国産電機株式会社 Engine throttle opening area estimation method, engine acceleration detection method and acceleration detection apparatus using the estimation method, engine fuel injection control method and fuel injection control apparatus
JP4137045B2 (en) * 2004-11-09 2008-08-20 株式会社ケーヒン Acceleration / deceleration detection apparatus and method for 4-cycle engine
JP4418480B2 (en) * 2007-04-24 2010-02-17 株式会社日立製作所 Fuel control device for internal combustion engine
US20130090836A1 (en) * 2011-10-06 2013-04-11 Visteon Global Technologies, Inc. System and method for throttle position sensor elimination
JP5586733B1 (en) * 2013-04-17 2014-09-10 三菱電機株式会社 Fuel injection amount control device for internal combustion engine and fuel injection amount control method for internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010056322A1 (en) * 2000-06-26 2001-12-27 Nissan Motor Co., Ltd. Enhanced multiple injection for auto-ignition in internal combustion engines
CN101418742A (en) * 2007-10-26 2009-04-29 株式会社电装 Cylinder characteristic variation sensing device
CN101900052A (en) * 2009-06-01 2010-12-01 株式会社电装 The fuel injection control system of internal-combustion engine
CN103256134A (en) * 2012-02-21 2013-08-21 福特环球技术公司 System and method for injecting fuel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110043381A (en) * 2018-01-15 2019-07-23 马涅蒂-马瑞利公司 Method for controlling the particulate loading flowed out from the particulate filter for being suitable for internal combustion engine
CN110043381B (en) * 2018-01-15 2022-03-18 马涅蒂-马瑞利公司 Method for controlling the amount of particulate matter flowing out of a particulate filter adapted for an internal combustion engine
CN116736745A (en) * 2023-07-06 2023-09-12 碎得机械(北京)有限公司 Control method, device and system of mixing equipment
CN116736745B (en) * 2023-07-06 2024-01-23 碎得机械(北京)有限公司 Control method, device and system of mixing equipment

Also Published As

Publication number Publication date
CN106907260B (en) 2021-08-20
ITUB20159587A1 (en) 2017-06-22

Similar Documents

Publication Publication Date Title
CN101932815B (en) Cetane number estimation method
US8949002B2 (en) System and method for injecting fuel
CN1576549A (en) Injection quantity control device of diesel engine
CN101553654B (en) Fuel injection device and control method thereof
CN106460686B (en) Fuel injection device for internal combustion engine
RU2586417C2 (en) Method for recovery of exhaust after treatment device (versions) and engine system
CN105026722A (en) Control device for internal combustion engine
US8776768B2 (en) Exhaust gas recirculation apparatus
JP6156313B2 (en) Diesel engine control device
US20150122217A1 (en) Internal combustion engine and method of direct fuel injection
JP2016539272A (en) Internal combustion engine and direct fuel injection method
CN106907260A (en) Method for controlling fuel injection in motor vehicles explosive motor
US20110079198A1 (en) Injection method and device for controlling an injection process in an internal combustion engine
JP2005248703A5 (en)
US10907567B2 (en) System and method for operating a fuel injector
CN103452675A (en) Method and system for adjusting engine throttles
US9624862B2 (en) Control apparatus for internal combustion engine
JP4839335B2 (en) In-cylinder injection engine
EP2706218A1 (en) Internal combustion engine operation control method
US10787980B2 (en) Fuel control device for engine
JP5735814B2 (en) Fuel injection control device and fuel injection control method for internal combustion engine
GB2431733A (en) Reduction of Hydrocarbon Evaporative Emissions from Internal Combustion Engines
JP6605968B2 (en) Internal combustion engine control device
CN109779770A (en) EGR control device
CN106979090B (en) Method and device for operating an internal combustion engine, in particular of a motor vehicle, with dual fuel injection

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant