CN101560922A - Method and control device for calculating adjustment limit for determining assumed real moment - Google Patents
Method and control device for calculating adjustment limit for determining assumed real moment Download PDFInfo
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- CN101560922A CN101560922A CNA2009102039698A CN200910203969A CN101560922A CN 101560922 A CN101560922 A CN 101560922A CN A2009102039698 A CNA2009102039698 A CN A2009102039698A CN 200910203969 A CN200910203969 A CN 200910203969A CN 101560922 A CN101560922 A CN 101560922A
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 230000006870 function Effects 0.000 claims description 74
- 238000004088 simulation Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000004913 activation Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 16
- 230000001276 controlling effect Effects 0.000 description 11
- 230000007704 transition Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
- F02D41/023—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio shifting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
- F16H63/502—Signals to an engine or motor for smoothing gear shifts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
- F02D2200/1004—Estimation of the output torque
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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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/26—Control of the engine output torque by applying a torque limit
Abstract
The present invention relates to a method and control device for calculating adjustment limit for determining assumed actual torque. The assumed actual torque provides torque set in condition that torque is provided of an internal combustion engine, the method includes steps: calculating generated rated torque from one or more torques, wherein without considering the torque provide of determined intervention function; calculating optimal torque data without intervention of the determined intervention function according to generated rating torque and in condition of considering dynamic action of the air system of the internal combustion engine; selecting a first or a second torque model to provide at least a efficiency limit according to limit effect of the efficiency during activation of the intervention function, wherein the efficiency limit is relative to largest possible or smallest possible efficiency provided by the internal combustion engine; determining adjustment limit based on data of the optimal torque and at least an efficiency limit as assumed actual torque.
Description
Technical field
Relate generally to of the present invention is obtained assumed actual torque in internal-combustion engine, and its intervention functions that provides internal-combustion engine is to the actual moment of given output when inoperative of torque.
Background technique
Internal-combustion engine in the automobile generally triggers by means of moment given in advance, and this moment changes engine parameter into an engine mockup, and the latter is corresponding to the direct adjustment amount of internal-combustion engine, for example, and the adjustment of firing angle, fuel injection quantity, closure etc.When moment given in advance is provided, general a plurality of control function or control gear that communicate with one another in the modern automobile, for example, engine controlling unit, controller of gear-boxes, ESP control gear etc. participate in control, they provide the setting value of moment separately, take in the torque given in advance that the triggering internal-combustion engine is used.In system now, to coordinate all moment setting values concurrently for this reason.Generating rated moment (predetermined torque) is provided by the moment setting value; for example; the restriction of the moment of wishing by the driver, the internal limitations of motor, protection gearbox; and other interventions; for example, ESP, differential protection, auto-speed regulate, the restriction in the monitoring and the adjustment limit of (mechanical or thermodynamic (al)) physically; for example, on diesel engine, limit description etc. with noise.
In engine control, for example also to consider and coordinate intervention, can improve or reduce the given engine moment of this engine interior with this by controller of gear-boxes to moment plane (torque is given).For gearshift cosily between each grade of gearbox, may need to provide the data of a relevant engine interior assumed actual torque to controller of gear-boxes.This assumed actual torque is corresponding to the actual moment of motor that exists when the torque that does not comprise controller of gear-boxes from the given total torque that obtains of single torque given (regulated quantity component), that is, controller of gear-boxes needs such amount, this amount provides, and can adjust which type of engine interior moment when the intervention (torque is given) that do not exist or do not consider this controller of gear-boxes and carried out.Hereinafter this amount is called the actual moment (IstMdOGE) that does not have gearbox control to intervene.In addition, this actual moment that does not have gearbox control to intervene also should be in fact adjustable, that is, get the value that engine system can reach in a short time.Must consider the engine interior adjustment limit physically for this reason.
This engine interior adjustment upper limit is physically generally determined by the basic moment of maximum not existing when by intervention functions basic moment being impacted, and is determined by the noise restriction by the maximum engine moment that may reach with on diesel engine.Similarly, this engine interior is adjusted lower limit physically, and the minimum basic moment when not existing this intervention functions that basic moment is impacted is determined.
Adjustable in a short time moment, particularly above-mentioned minimum and maximum basic moment, also (for example may be subjected to intervention functions, controller of gear-boxes) influence of Gan Yuing, or rather, be subjected to following factor affecting: the influence of influence that closure is adjusted and cylinder filling extent (directly fills with air degree) or also be subjected to indirect influence, for example, rotating speed changes, shielding (Ausblendung) for single cylinder or all cylinders, the adjustment of the camshaft that intake valve and exhaust valve are used, the adjustment of supercharging movement of valve (Ladungsbewegungsklappe), the switching of sucking pipe, the switching of malleation circulating air door, change of boost pressure (Ladedrucks) or the like.Yet the engine interior adjustment limit is not physically also considered these influences so far.
Summary of the invention
Task of the present invention is, one or more torque limits that produce under situation about not existing by the given influence of the torque of determining are provided.The assumed actual torque that definite internal-combustion engine that provides when the generation resultant couple does not comprise the torque given (regulated quantity component) of controller of gear-boxes may reach in a short time needs these torque limits.
Task of the present invention especially, gearbox control function is not provided at not the torque limit that produces under the situation by the given influence that causes of torque of gearbox control function, so that can be obtained the actual moment that does not have gearbox control intervention by means of this torque limit.
This task is by solving according to the method for claim 1 and by the control gear according to claim arranged side by side.
Other favourable schemes of the present invention provide in appurtenance.
First aspect, a kind of method of adjusting the limit of obtaining at the internal-combustion engine assumed actual torque is provided, wherein this assumed actual torque provides (angeben) torque, it is that internal-combustion engine provides when given moment, this moment is under the given situation of the torque of the intervention functions of not considering to determine, obtain from one or more moments are given, and internal-combustion engine moves under the given situation of the torque of considering the intervention functions that this is determined, this method comprises the following steps:
-from the given generation rated moment of obtaining of one or more moment, do not consider that wherein the torque of the intervention functions that this is determined is given;
-under the situation of the dynamic characteristic of considering air system of internal combustion engines,, obtain optimal torque data (Angabe) that do not have this intervention functions of determining to intervene according to the rated moment of this generation;
-selection first or second moment model, so that according between the intervention functions active period to the influence of this efficient limit, provide at least one efficient limit, wherein this efficient limit maximum possible or minimum possible efficient that in fact can provide corresponding to this internal-combustion engine; And
-according to these optimal torque data and this at least one efficient limit, determine the assumed actual torque adjustment limit.
Said method makes provides the basic moment adjustment limit physically that does not have the intervention functions intervention to become possibility.Adopt these to adjust the assumed actual torque that the limit can be obtained the reality that does not have the intervention functions intervention.Because the intervention of intervention functions has the effect to the working state of internal-combustion engine, it for example, may show aspect the change of the efficient limit, adjust the limit in order to determine this, at least to preserve two moment model, they for example can be selected according to activation and/or other running statees of this intervention functions, so that stipulate this efficient limit.Basically do not have intervention functions intervention obtain basic moment physics adjust the limit, wherein get rid of by the intervention of gearbox control function caused influential.
In addition, can also at first obtain (modelliertes) optimal torque of a simulation by means of the dynamic air system dynamic model, wherein adopt and adjust function (Angleichfunktion), so that deexcitation according to the intervention functions of determining, connect with continuing an optimal torque that simulates is adjusted to true optimal torque, this true optimal torque is to obtain and provide moment under the given situation of the torque of considering the intervention functions that this is determined by the moment model of internal-combustion engine.
In addition, this adjustment function can also particularly be adjusted by means of the ramp function that has greatest gradient by means of a continuous function.
For the selection that this first or second moment model that at least one efficient limit is carried out is provided can be carried out according to the cylinder shielding of carrying out between the intervention functions active period.
In addition, the adjustment limit of being obtained can also be adjusted function according to another after this intervention functions deexcitation of determining, by means of continuous function, particularly according to other ramp functions, adjust to the torque limit value of internal-combustion engine moment model.
According to an embodiment, this intervention functions of determining can be the gearbox control function that is used for controlling with the shift process of the gearbox of internal-combustion engine coupling.This makes the optimum gearshift strategy in the controller of gear-boxes become possibility, and reaches optimum shifting comfort with this.Optimum simulation makes and controller of gear-boxes is provided suitable feedback becomes possibility, so that can carry out other control actions according to the actual moment that does not have gearbox control to intervene that provides there.
Another aspect provides a kind of control unit, adjust the limit in order to obtain the internal-combustion engine assumed actual torque, wherein this assumed actual torque provides such torque, this torque is that internal-combustion engine provides when given moment, this moment is to obtain from one or more moments are given under the given situation of the torque of the intervention functions of not considering to determine, and this internal-combustion engine moves under the given situation of the torque of considering the intervention functions that this is determined, and wherein this control unit comprises:
-be used for not considering wherein that from the given device that generates rated moment of obtaining of one or more moments the moment of the intervention functions that this is determined is given;
-be used for according to the rated moment that generates with under the situation of considering the air system of internal combustion engines dynamic characteristic device that the optimal torque data that obtaining does not have this intervention functions intervention of determining are used;
-be used for influence according to this efficient limit between the intervention functions active period, select first or second moment model that the device of at least one efficient limit is provided, wherein this efficient limit maximum possible or minimum possible efficient that in fact can provide corresponding to internal-combustion engine; With
-be used for determining the device of the adjustment limit of assumed actual torque according to optimal torque data and at least one efficient limit.
A computer program is provided on the other hand, comprises programming code, when it is carried out, carry out said method on data processing equipment.
Description of drawings
The embodiment that the present invention is recommended does more detailed explanation with reference to the accompanying drawings.In the accompanying drawing:
Fig. 1 is a schematic block diagram of carrying out the engine system of using according to method of the present invention;
Fig. 2 illustrates to determine not have gearbox to control the functional block diagram of the function of the minimum and maximum basic moment under the situation of intervening;
Fig. 3 to 5 is illustrated in the gearbox control intervention and soon the different determining signal change curve of correlation quantity thereafter.
Embodiment
Fig. 1 schematically shows the skeleton diagram of engine system 1, has internal-combustion engine 2, and it is by its Transmitted chains 3 and 4 couplings of gearshift speed reducer.This gearshift speed reducer 4 comprises gearbox device 5 and clutch device 6, and is triggered by controller of gear-boxes 7, so that realize the conversion between joint and disengagement and the shelves level.This controller of gear-boxes 7 provides gearbox torque M
Getriebe, it is obtaining generation rated moment M in this engine controlling unit 8
Soll 'In time, take in.The gearbox torque M that this controller of gear-boxes 7 is provided
GetriebeCan get on the occasion of and negative value.
Internal-combustion engine 2 is according to a rated moment M given in advance
SollRequire M with other moments
SonstAnd gearbox torque M
GetriebeTrigger, in engine controlling unit 8, obtain thus and generate rated moment M
Soll 'This generates rated moment M
Soll 'For example, require M by other moments
SonstAccumulated value and gearbox torque M
GetriebeProvide.As an alternative or supplement, generate rated moment M
Soll 'Can be for example, the rated moment M given in advance of the moment that can wish corresponding to the driver
Soll, for example other moments that can provide by ESP-device, protective function, rotating speed limitation function, when the operating mode conversion etc. require M
Sonst, and gearbox torque M
GetriebeDraw from the combination of minimum value and MAXIMUM SELECTION.
In addition, in this engine controlling unit 8, should generate rated moment M
Soll 'Be converted to engine parameter, for example, throttle position DK, fuel injection quantity EM, firing angle ZW or the like are so that according to desired generation rated moment M
Soll 'Trigger internal-combustion engine 2.In this engine controller 8, preserve a moment model for this reason, for example, by means of one or more characterisitic families, generating rated moment M
Soll 'Be converted to corresponding engine parameter.
Controller of gear-boxes 7 is used for as far as possible cosily controlling shift process for automatic transmission.Controller of gear-boxes 7 needs some information from engine controlling unit 8 for this reason, for example, the data of relevant assumed actual torque, it provides, and what kind of torque internal-combustion engine 2 can provide when not existing by the influencing of controller of gear-boxes 7.This parameter is called the actual moment IstMdOGE that does not have gearbox control to intervene.
Obtaining the actual moment IstMdOGE that does not have gearbox control to intervene in engine controlling unit 8 is known on the state of the art, so no longer further set forth in this is described.Yet, intervention by controller of gear-boxes 7 can influence adjustable in a short time minimum and maximum basic moment, or rather, for example, by to the influence of throttle position and cylinder filling extent (the directly influence of fills with air degree) or also pass through remote-effects, for example, the shielding of adjustment, single cylinder or all cylinders of the camshaft of using by change, intake valve or the exhaust valve of rotating speed, the adjustment of supercharging movement of valve, the switching of sucking pipe, the switching of malleation circulating air door, change of boost pressure etc.
Therefore, need determine not have maximum basic moment MxBsMdOGE that gearbox control intervenes and the minimum basic moment MnBsMdOGE that does not have gearbox control to intervene, so that determine the data of the reality of the relevant actual moment that may reach in a short time when not having gearbox control to intervene.This generally reaches with such method, and promptly by means of the maximum or minimum basic moment MxBsMdOGE that does not have gearbox control to intervene, MnBsMdOGE is limited the at first unrestricted actual moment IstMdOGE that does not have gearbox control to intervene.This limited actual moment that does not have gearbox control to intervene is offered controller of gear-boxes 7 to be used.
The method that can obtain the minimum and maximum basic moment that does not have gearbox control intervention more simply then will be described.Schematically show among Fig. 2 and be used to obtain the maximum or minimum functional flow diagram of the method for moment substantially that does not have gearbox control to intervene.This method is preferably in the engine controlling unit, for example, carries out by means of software, firmware or hardware.
Give 11 inputs of first function block rated moment M given in advance
Soll, particularly driver's moment of wishing, and every other moment requires M
Sonst, comprise gearbox torque M
GetriebeAccording to the gearbox control signal GE that offers engine controlling unit, from rated moment M given in advance
SollAnd other moments require M
Sonst, obtain the rated moment M that does not have gearbox control to intervene
Soll_OGE, wherein do not consider this gearbox torque M between the gearbox control functional period that activates
GetriebeThe gearbox control signal GE that promptly offers engine controlling unit provides, and when can exist by gearbox control intervention influences air and/or efficient, that is, when can provide to be not equal to zero gearbox torque M
Getriebe
In case by showing that the effective gearbox control signal GE that gearbox control is intervened shows the influence of identification air, just the rated moment M that does not have gearbox control to intervene
Soll_OGERegard target moment as, it lags behind with the known physical time that the volume by sucking pipe causes, or comes convergence not have the optimal torque of gearbox control intervention with time-varying process (sucking pipe dynamics is filled dynamics).
The rated moment M that does not have gearbox control to intervene
Soll_OGEBe limited to the adjustment range of reality in confinement block 12, this real adjustment range is by drawing based on internal-combustion engine 2 moment model 13 and by fills with air model 14, and it provides minimum and maximum basic moment M to confinement block 12
Max, M
MinOr minimum and maximum filling F
Max, F
MinThis moment model 13 and this fills with air model 14, for example, can be used as characterisitic family provides.As the restriction result in the confinement block 12, people obtain the limited rated moment M that does not have gearbox control to intervene
Soll_OGE_BEGThis fills with air model 14 is described the characteristic of air system, for example, and the supercharging performance of the volume of sucking pipe, turbocharger etc., that is, minimum and maximum fills with air.By a suitable standard moment model that is arranged on the confinement block 12, minimum and maximum fills with air is changed into theoretical torque limit.This moment model 13 is described traditional in normal operation internal-combustion engine and is used all operational input parameters, that is, rated moment M
Soll, particularly driver's moment of wishing, and every other moment requires M
Sonst, comprise gearbox torque M
GetriebeAnd the minimum and maximum basic moment M that obtains thus
Max, M
Min, as real physical constraints.
The limited rated moment M that this does not have gearbox control to intervene
Soll_OGE_BEGBe provided for the air system model 15 of taking filter form, so that the dynamic characteristic of the air system, particularly sucking pipe of simulation internal-combustion engine 2.Air system model 15 is from the data of fills with air model 14 acquisitions about time constant T for this reason.This time constant T may depend on the rotating speed of internal-combustion engine 2 and the load M of internal-combustion engine 2
LastAs a result of people obtain the optimal torque M of a simulation
Soll_OGE_mod, it provides the moment that can reach according to the dynamic short-term of air system.
Known the pressure (throttle valve is before with afterwards) that in fact puts in the sucking pipe, just can estimate the maximum optimal torque that short-term may reach according to system mode (for example, the current state of the current pressurized state of perhaps existing turbocharger and malleation circulating air door of air system etc.).
The desired value of the optimal torque that simulates is limited with the actual optimum moment OptMreal that is provided by moment model 13 that provides thus.Therefore, this optimal torque OptMmod that simulates that does not have gearbox control to intervene keeps realistically, and the parameter of then calculating thus, the minimum and maximum basic moment MxBsMdOGE that does not have gearbox control to intervene, and MnBsMdOGE can set up in a short time.
When in case the influence of 7 pairs of optimal torque of controller of gear-boxes is effective (this shows by gearbox control signal GE), just do not have the calculating of the optimal torque OptMdOGE of gearbox control intervention, and be then used in the endurance that carries out the transition to actual parameter continuously.When the influence by controller of gear-boxes 7 finishes, carry out the transition to actual parameter by means of adjusting function (Angleichfunktion) 16.Adjusting function 16 obtains to control the optimal torque M that intervenes from the gearbox that do not have that simulates that air system model 15 provides
Soll_OGE_mod, and obtain real optimal torque OptMreal from the moment model 13 of internal-combustion engine 2 in addition.This adjustment function 16 is used for basically according to gearbox control signal GE, is not to select not have gearbox to control the optimal torque M of the simulation of intervening
Soll_OGE_mod, select actual optimum moment exactly, and prevent from not have gearbox to control the jump type transition of the optimal torque OptMdOGE of the generation of intervening from moment model 13.
When the influence by this controller of gear-boxes 7 begins, there is not the optimal torque M of the simulation of gearbox control intervention
Soll_OGE_modEquate with actual optimum moment OptMreal from moment model 13.After the intervention of controller of gear-boxes 7 begins, this optimal torque M that simulates
Soll_OGE_modJust depart from true optimal torque OptMreal.This is the consequence of following process, promptly when determining true optimal torque OptMreal by moment model 13, further considers by the moment of controller of gear-boxes 7 given.Adjust the parameter M of function 16 simulations by this
Soll_OGE_modShow reality as far as possible because the influence end (GE represents by this gearbox control signal) that produces by controller of gear-boxes 7 is afterwards, it is convergence actual optimum moment OptMreal once more continuously.Show really as far as possible from the optimal torque OptMdOGE that does not have gearbox control to intervene that adjusts function 16 generations, and have only and just depart from true optimal torque OptMreal when needed.By this adjustment the optimal torque value OptMdOGE that does not have gearbox control to intervene is not jumped and become possibility.For example, this can reach by the ramp function of a greatest gradient of a definition, the optimal torque value M that simulates that does not have gearbox control to intervene
Soll_OGE_modReturn this actual optimum moment linearly or with this gradient with being stepped shape.Realize that other functions of transition continuous, that gradient is limited also can.This ramp function for example, can define a maximum changing value, with this changing value do not have the optimal torque value OptMmod that simulates that gearbox control intervenes in a control circle the biglyyest the direction to true optimal torque change.
Never the optimal torque OptMdOGE of gearbox control intervention calculates the basic moment MxBsMdOGE of the maximum that does not have gearbox control to intervene or does not have gearbox to control the minimum moment MnBsMdOGE substantially that intervenes now.The maximum basic following generation of moment MxBsMdOGE that this does not have gearbox control to intervene:
MxBsMdOGE＝OptMdOGE×MxEtaOGE
This does not drive the minimum basic following generation of moment of intervention:
MnBsMdOGE＝OptMdOGE×MnEtaOGE
MxEtaOGE is corresponding to the basid efficiency of the maximum possible that does not have gearbox control to intervene, and MnEtaOGE is corresponding to the minimum possible basid efficiency that does not have gearbox control to intervene.Possible efficient this maximum possible or minimum is corresponding to the efficient limit, and they provide, and in fact internal-combustion engine can provide, for example, and the highest or minimum efficiency that adjustment and the λ influence by firing angle can provide.
Above-mentioned multiplication separately carries out in multiplication link 18.This minimum and maximum basid efficiency MnEtaOGE provides (form of taking one or more characterisitic family) by traditional moment model MM 19 that is used for the normal operation of internal-combustion engine, and offers 18 uses of multiplication link.Only otherwise exist gearbox control to intervene (gearbox control signal GE) and as long as do not provide the gearbox torque M that influences the efficient limit between gearbox control intervention period
Getriebe, just adopt traditional moment model 19.This efficient limit for example can change along with the change of rated moment, and it can cause the change of the shielding of cylinder, stoichiometrical change or tendency to detonate.In addition, the factor that changes this moment model has, for example, throttle position and cylinder filling extent (directly fills with air influence) or also have remote-effects, for example, the adjustment of the adjustment of the camshaft used of the change of rotating speed, intake valve or exhaust valve, supercharging movement of valve, sucking pipe switching, the switching of malleation circulating air door, change of boost pressure or the like.
But if exist gearbox control to intervene, and changed rated moment given in advance between gearbox control intervention period, it causes traditional moment model MM 19 not use, and for example, when changing the cylinder number of shielding, this is determined by judgment device 22 so.In an illustrated embodiment, this judgment device 22 obtains gearbox control signal and the shielded signal Ab that shows the cylinder conductively-closed.This judgment device 22 for example can adopt AND when suitably selecting signal.
Under the situation of cylinder shielding, amended moment model MM
Mod20 consider the λ efficient of change.Shielding by cylinder changes the still stoichiometry (λ) of the cylinder of igniting, thereby changes the efficient of this cylinder.In addition, by shielding and pass through the change of the cylinder λ of igniting, the tendency to detonate of this cylinder changes.This is equally at amended moment model MM
ModConsider in 20.
As in multiplication link 18 with corresponding big as far as possible basid efficiency MxEtaOGE or as far as possible little basid efficiency MnEtaOGE multiplied result, basic moment MxBsMdOGE of the maximum that does not have gearbox control to intervene that provides and the minimum moment MnBsMdOGE substantially that does not have gearbox control to intervene, introduce other adjustment function 23, it is after end is intervened in gearbox control, do not intervene maximum or minimum basic moment MxBsMdOGE there being gearbox control, MnBsMdOGE does not have jumpily, that is, carry out the transition to true minimum and maximum moment Mmax continuously, Mmin from moment model 13.Another working method of adjusting function 23 is corresponding to a described function adjusting function 16.This adjustment is separately carried out for the maximum basic moment MxBsMdOGE that does not have gearbox control to intervene and for the minimum basic moment MnBsMdOGE that does not have gearbox control to intervene.The upper and lower bound of the basic moment that does not have gearbox control intervention that therefore simulates shows really as far as possible.They only just depart from their actual value when needed, that is, the minimum and maximum basic moment Mmax and the Mmin that provide by moment model 13 are provided.
Never minimum and the basic moment MnBsMdOGE of maximum that intervenes controlled the optimal torque OptMdOGE that intervenes and do not had gearbox to control by gearbox now, MxBsMdOGE, be similar to the actual moment IstMdOGE that known now systematically determining do not have gearbox control to intervene, and feed back to controller of gear-boxes 7.Therefore, the actual moment IstMdOGE that does not have gearbox control to intervene just can be provided, and can require to influence this value by the moment of controller of gear-boxes, and this actual moment IstMdOGE that does not have gearbox control to intervene is within the adjustable number range of reality in addition, in case the air influence that should be caused by the controller of gear-boxes 7 and influence of efficient finished.
Fig. 3 to 5 expression parameter gearbox torque M
Getiebe, the rated moment M that generates
Soll_OGEThe different parameters curve, the minimum and maximum basic moment MxBsMdOGE that does not have gearbox control to intervene, MnBsMdOGE and actual basic moment, that is, the different change procedures of actual moment IstMreal.
These three figure are respectively qualitatively for generating rated moment M
Soll_OGEDifferent change procedures intervene (signal M between active period in gearbox control
GetiebeExpression gearbox control moment) provide the parameter I stMreal of generation, and the minimum and maximum basic moment MxBsMdOGE that does not have gearbox control to intervene, MnBsMdOGE or the optimal torque OptMdOGE that does not have gearbox control to intervene.As can be seen, III provides by the endurance, the optimum basic moment OptMdOGE that does not have gearbox control to intervene, after end is intervened in gearbox control, come to once more with gradient given in advance step by step or continuously on actual basic moment (actual moment) IstMreal, control the jump of the numerical value of the actual moment IstMdOGE that intervenes so that prevent the gearbox that do not have that offers controller of gear-boxes 7 as far as possible.
Although top embodiment is described in conjunction with controller of gear-boxes, above-named method also can be implemented with other functions that a limited in time moment setting value is provided.
Claims (8)
1. be used to draw the assumed actual torque (IstMdOGE) of internal-combustion engine (2) the adjustment limit (MnBsMdOGE, method MxBsMdOGE),
Wherein this assumed actual torque (IstMdOGE) provide this internal-combustion engine in moment to the torque that regularly provides, this moment is from the given (M of one or more moments under the given situation of the torque of the intervention functions of not considering to determine
Soll, M
Sonst) obtain, and this internal-combustion engine (2) moves in the torque of considering the intervention functions that this is determined givenly, comprises the following steps:
-from the given (M of one or more moments
Soll, M
Sonst) obtain the rated moment (M of generation
Soll_OGE), do not consider that wherein this torque of the intervention functions that this is determined is given;
-according to generating rated moment (M
Soll_OGE) and under the situation of the dynamic characteristic of considering air system of internal combustion engines, obtain the data of the optimal torque (OptMdOGE) that does not have this intervention functions of determining intervention;
-according between the intervention functions active period to the influence of this efficient limit, select first or second moment model (19,20) provide at least one the efficient limit (MxEtaOGE, MnEtaOGE), wherein (MxEtaOGE is MnEtaOGE) corresponding to the possible efficient in fact available maximum possible of internal-combustion engine (2) or minimum for this efficient limit;
-by the data of optimal torque (OptMdOGE) and this at least one efficient limit (MxEtaOGE, MnEtaOGE), for this assumed actual torque (IstMdOGE) determine this adjustment limit (MnBsMdOGE, MxBsMdOGE).
2. according to the process of claim 1 wherein that the dynamic characteristic of this air system with the modeling of dynamic air system, at first obtains the optimal torque (M of simulation by means of the dynamic air system model
Soll_OGE_mod), use to adjust function (16), so that according to the deexcitation of this intervention functions of determining, the optimal torque (M that simulates
Soll_OGE_mod) adjust to continuously on the true optimal torque of obtaining by the moment model (13) of internal-combustion engine (2) (OptMreal), and this moment to be the torque of the intervention functions of considering that this is determined provide givenly.
3. according to the method for claim 2, wherein should adjust function (16), particularly adjust by means of the ramp function that has greatest gradient by means of continuous function.
4. according to each method in the claim 1 to 3, wherein (data of the data of relevant cylinder shielding (Ab), relevant stoichiometrical data or relevant tendency to detonate are used in MxEtaOGE, influence MnEtaOGE) as this efficient limit.
5. according to each method in the claim 1 to 4, the adjustment limiting value of wherein being obtained, after this intervention functions deexcitation of determining, adjust function according to another, by means of continuous function, particularly according to another ramp function, be adjusted to the moment model (13) of internal-combustion engine (2) torque limit (Mmax, Mmin).
6. according to each method in the claim 1 to 5, wherein the intervention functions that should determine be a gearbox control function, the shift process of the gearbox (4) that it is coupled in order to control and internal-combustion engine (2).
7. be used to obtain the adjustment limit (MnBsMdOGE of internal-combustion engine assumed actual torque (IstMdOGE), MxBsMdOGE) control unit, this assumed actual torque (IstMdOGE) provides the torque that this internal-combustion engine (2) provides to timing in moment, this moment is to obtain by one or more moments are given under the given situation of the torque of the intervention functions of not considering to determine, and internal-combustion engine (2) moves under the given situation of the torque of considering the intervention functions that this is determined.
Wherein this control unit comprises:
-be used for from the given (M of one or more moments
Soll, M
Sonst) obtain the rated moment (M of generation
Soll_OGE) device (11), do not consider that the torque of the intervention functions that this is determined is given;
-be used for according to the rated moment (M that generates
Soll_OGE) and under the situation of the dynamic characteristic of considering air system of internal combustion engines, obtain the device (12,15,16) of the data of the optimal torque (OptMdOGE) that does not have this intervention functions of determining intervention;
-be used for selecting first or second moment model (19 according to the influence of the efficient limit between the intervention functions active period, 20), so that at least one the efficient limit (MxEtaOGE is provided, MnEtaOGE) device (21), maximum possible or the minimum possible efficient that in fact this efficient limit can provide corresponding to this internal-combustion engine; With
-be used for by (MxEtaOGE be that this assumed actual torque (IstMdOGE) is determined the adjustment limit (MnBsMdOGE, device MxBsMdOGE) (18,19) MnEtaOGE) according to the data of optimal torque (OptMdOGE) and this at least one efficient limit.
8. computer program comprises programming code, when this programming code is carried out on data processing unit, carries out a method according to one of claim 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008000693.9 | 2008-03-14 | ||
| DE102008000693.9A DE102008000693B4 (en) | 2008-03-14 | 2008-03-14 | Process and control for the determination of control limits for the determination of a hypothetical actual torque |
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| CN101560922A true CN101560922A (en) | 2009-10-21 |
| CN101560922B CN101560922B (en) | 2014-02-19 |
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| CN200910203969.8A Active CN101560922B (en) | 2008-03-14 | 2009-03-13 | Method and control device for calculating adjustment limit for determining assumed real moment |
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| CN (1) | CN101560922B (en) |
| DE (1) | DE102008000693B4 (en) |
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| CN110056649A (en) * | 2018-01-18 | 2019-07-26 | 腓特烈斯港齿轮工厂股份公司 | Transmission control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2985970B1 (en) * | 2012-01-24 | 2014-03-21 | Peugeot Citroen Automobiles Sa | METHOD FOR DETERMINING THE TORQUE OF A THERMAL ENGINE |
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| DE102004044520A1 (en) * | 2004-09-15 | 2006-03-30 | Robert Bosch Gmbh | Method and device for operating a drive unit |
| DE102005062123B4 (en) * | 2005-12-23 | 2019-05-29 | Robert Bosch Gmbh | Method and apparatus for operating an internal combustion engine of a motor vehicle |
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| CN110056649B (en) * | 2018-01-18 | 2021-08-17 | 腓特烈斯港齿轮工厂股份公司 | Transmission control |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008000693A1 (en) | 2009-09-17 |
| CN101560922B (en) | 2014-02-19 |
| DE102008000693B4 (en) | 2020-10-29 |
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