阅读说明：本技术 用于运行具有燃烧马达的马达系统的废气后处理装置的方法和装置 (Method and apparatus for running the exhaust aftertreatment device of the motor system with combustion motors ) 是由 A.瓦格纳 M.法伊 于 2019-05-16 设计创作，主要内容包括：本发明涉及一种用于运行马达系统(1)的方法,所述马达系统具有燃烧马达(2)和废气后处理装置(8),该方法具有以下步骤：-实施填充水平调节,以用于根据预先给定的填充水平目标值来调节废气后处理装置(8)的填充水平；-运行用于填充水平调节的预控制；并且-根据所测量的λ值(λ<Sub>A</Sub>)与所建模的λ值(λ<Sub>A,mod</Sub>)之间的偏差来对所述预控制进行适配。(The present invention relates to a kind of methods for running motor system (1), the motor system has combustion motors (2) and exhaust aftertreatment device (8), this method has follow steps :-implement fill level adjusting, with the fill level for adjusting exhaust aftertreatment device (8) according to previously given fill level target value；The pre-control that operation is adjusted for fill level；And according to measured λ value (λ A ) with the λ value (λ that is modeled A,mod ) between deviation the pre-control is adapted to.)

1. the method for running motor system (1), the motor system has combustion motors (2) and exhaust aftertreatment device (8), the method has follow steps:

Implement fill level adjusting, for adjusting the exhaust after-treatment according to previously given fill level target value The fill level of device (8)；

The pre-control that operation is adjusted for fill level；And

According to measured λ value (λ_A) with the λ value (λ that is modeled_A,mod) between deviation the pre-control is adapted to.

2. according to the method described in claim 1, the λ value (λ measured by wherein_A) correspond to measured outlet side λ value, and And the λ value modeled corresponds to the λ value (λ of modeled outlet side_A,mod).

3. method according to claim 1 or 2, wherein the fill level, which is adjusted, provides λ corrected value (Δ λ_korr) conduct Regulated quantity passes through the λ pre-control value (λ of the output as the pre-control_vst), especially load the λ corrected value with additive, To have target λ value (λ to be regulated for obtaining_soll).

4. according to the method described in claim 3, wherein according to the target λ value (λ_soll) and λ adjust obtain fuel quantity correction Measure (r_korr), wherein according to the fuel quantity correcting value (r_korr) to calculate there is fuel quantity (r) to be sprayed.

5. method according to claim 1 to 4, wherein in order to provide the exhaust aftertreatment device (8) Physical model and modeled λ value (λ is calculated by means of previously given path model_A,mod), with for it is measured into λ value (the λ of mouth side_E) on the basis of obtain the fill level (θ modeled of the exhaust aftertreatment device (8)_mod), wherein Fill level (the θ modeled_mod) on the basis of implement the fill level and adjust.

6. according to the method described in claim 5, wherein being calculated the λ value of modeled outlet side by means of the path model (λ_A,mod), wherein according to the λ value (λ of the outlet side modeled_A,mod) λ value (λ with measured outlet side_A) between difference count Calculate λ deviant (Δ λ_off), the pre-control is adapted to according to the λ deviant.

7. according to the method described in claim 6, wherein to the λ value (λ of the outlet side modeled_A,mod) and measured outlet side λ value (λ_A) between difference be filtered, particularly low-pass filtering, for obtaining λ deviant (Δ λ_off), wherein according to institute The operating point of motor system (1) is stated especially to select the time constant of the filtering.

8. the method according to claim 5 to 7, wherein the pre-control is designed to the reversion of the path model, with For as expected fill level target value and according to measured λ value (λ_A) with the λ value (λ that is modeled_A,mod) between Deviation obtain pre-control λ value, wherein obtain temporary pre-control λ in particular according to desired fill level target value Value, loads λ deviant to the temporary pre-control λ value with additive, and the λ deviant depends on measured λ value (λ_A) with λ value (the λ modeled_A,mod) between deviation.

9. method according to any one of claim 1 to 8, wherein the pre-control obtains fill level target value rail Mark, with the fill level target value (θ adjusted for the previously given fill level_set,filt).

10. device, particularly control unit (15), for running the horse with combustion motors (2) and exhaust aftertreatment device (8) Up to system (1), wherein described device is configured to:

Implement fill level adjusting, for adjusting the exhaust after-treatment according to previously given fill level target value The fill level of device (8)；

The pre-control that operation is adjusted for fill level；

According to measured λ value (λ_A) with the λ value (λ that is modeled_A,mod) between deviation the pre-control is adapted to.

11. the computer program with program code segments, the computer program are configured for: existing in the computer program Implement side according to any one of claim 1 to 9 when executing on computing unit, particularly moveable computing unit Method.

12. a kind of machine readable storage medium, the storage medium have be saved above it according to claim 11 The computer program.

Technical field

The present invention relates to a kind of motor system with combustion motors, wherein burning waste gas in operation by means of exhaust gas after Processing unit is handled.In addition, the present invention relates to a kind of methods for running such motor system, and more particularly to A method of it is adapted to for the adjusting based on model to exhaust aftertreatment device.

Background technique

Burning waste gas is generated in combustion motors operation, burning waste gas is other than nitrogen, carbon dioxide and water also comprising big Measure combustion product.These combustion products include hydrocarbon, carbon monoxide and nitrogen oxides, they are classified as pollutant simultaneously And its discharge is by legal restriction.According to the current prior art, suitable for running the exhaust gas pole of motor vehicle with combustion motors Limit value can only be abided by with catalytic exhaust post-processing.

Therefore, exhaust gas side is provided with corresponding exhaust aftertreatment device, it is so-called in the exhaust aftertreatment device Ternary catalyzing unit is most common, because it has high conversion to hydrocarbon, carbon monoxide and nitrogen oxides.However, This high conversion is only realized in the narrow range of operation of combustion motors, wherein the air fuel in burning front air cylinder is mixed Close the amount distribution (i.e. air coefficient λ=1) that object corresponds to approximate stoichiometry.The permission being distributed around the amount of the stoichiometry The margin of tolerance is referred to as catalyst converter window.

In order to run exhaust aftertreatment device in so-called catalyst converter window, in current motor control system usually It is adjusted using λ.λ, which is adjusted, is based on exhaust sensor signal, and the exhaust sensor signal is sensed by exhaust sensor, so-called λ Device is detected in the inlet side and outlet side of exhaust aftertreatment device.Exhaust sensor signal corresponds to λ value and shows to burn Corresponding oxygen content in exhaust gas, the air fuel of air fuel mixture at the time of thereby determining that before burning Than.

For λ value, the namely existing λ value before exhaust aftertreatment device for adjusting inlet side, by means of inlet side Exhaust gas oxygensensor measure the oxygen content of burning waste gas, and in order to carry out fuel quantity metering and correspondingly to combustion in pre-control The adjusting of doses is corrected.In order to improve the precision of adjusting, the λ value of the outlet side of the exhaust gas oxygensensor of outlet side is extraly considered. The λ value of the outlet side detected by the exhaust gas oxygensensor of outlet side adjusts (F ü hrungsregelung) commonly used in guiding, described to lead It is arranged in front of λ adjusting to adjusting.

In addition to typically only to and the small deviation of λ value=1 be adjusted and the guiding will be relatively slowly designed adjusts it Outside, usually there are also following function in current motor control system, the function exist and the big deviation of λ value=1 it When/caused in the form of λ pre-control later following as a result, rapidly reaching catalyst converter window again again, such as with cutting After the stage of feeding etc..However, current regulation scheme has the disadvantages that through the exhaust gas oxygensensor of outlet side more behindhand It was found that the case where leaving catalyst converter window and thus can only be corrected to the amount of injection with postponing.

Summary of the invention

According to the present invention, be provided with it is a kind of it is described in accordance with the claim 1, for after running there is combustion motors and exhaust gas The method of the motor system of processing unit and according to device described in claim arranged side by side and motor system.

Other design scheme is illustrated in the dependent claims.

A kind of motor system for running with combustion motors and exhaust aftertreatment device is provided with according to first aspect Method, this method have following step:

Implement fill level adjusting, for adjusting exhaust aftertreatment device according to previously given fill level target value Fill level；

The pre-control that operation is adjusted for fill level；

Pre-control is adapted to according to the deviation between measured λ value and the λ value modeled.

The above method is used to run the motor system with exhaust aftertreatment device, and the exhaust aftertreatment device passes through λ It adjusts on the basis of model and adjusts, the core of the above method is, the pre-control that is equipped with and can be adapted to is adjusted to λ.After exhaust gas The adjusting based on model of reason device this have the advantage that in principle, adjusts with the guiding of the exhaust sensor based on outlet side Situation is compared, and can identify the case where will leaving catalyst converter window earlier.Thereby, it is possible to by mixing for air fuel The targeted correction ahead of time of object is to offset the case where will leaving catalyst converter window.

The robustness that this adjusting based on model can be extraly improved by using this mode of pre-control, according to institute Deviation between the λ value of measurement and the λ value modeled is adapted to the pre-control.In short, this can be quickly to motor The deviation of operation and catalyst converter window is reacted, so as to especially reduce harmful substance row significantly in dynamic operation It puts.

In addition, measured λ value can correspond to the λ value of measured outlet side, and the λ value modeled can correspond to In the λ value of the outlet side modeled.

It can provide, fill level, which is adjusted, provides λ corrected value as regulated quantity, by λ pre-control value as pre-control It exports and is loaded to the λ corrected value, to obtain target λ value to be regulated.

Fuel quantity correcting value according to target λ value and λ adjusting more particularly to obtain, wherein being counted according to fuel quantity correcting value Calculation has fuel quantity to be sprayed.

Furthermore it is possible to be modeled by means of the path model of the physical model for providing exhaust aftertreatment device to calculate λ value, with for being modeled on the basis of the λ value of measured inlet side to the fill level modeled, wherein in institute Implement fill level adjusting on the basis of the fill level of modeling.

More particularly to be calculated the λ value of modeled outlet side by means of path model, wherein according to the outlet modeled Difference between the λ value of side and the λ value of measured outlet side obtains λ deviant, according to λ deviant come to the pre-control into Row adaptation.

Furthermore it is possible to the λ value to the outlet side modeled and the difference between the λ value of measured outlet side be filtered, Especially low-pass filtering, to be used to obtain λ deviant, wherein selecting the time of filtering in particular according to the operating point of motor system Constant.

In one embodiment, the pre-control can obtain fill level target value track, for previously given The fill level target value that fill level is adjusted.

It can provide, the pre-control is designed as to the reversion of path model.This has the advantages that only in catalyst converter The fill level that is modeled by means of path model deviate the fill level target value track calculated by the pre-control When, adjuster must just be intervened.

Fill level target value track is actually able to achieve (such as the burning of motor of which λ value it is considered herein that arrive The limit or maximum desired rich oil degree or oil-poor degree under current service condition).

The reversion of the path model is difficult due to non-linear, and therefore can come in conjunction with alternative manner using (forward) path model, for distributing λ pre-control value for fill level target value.

According to a further aspect, provided with a kind of motor system for running with combustion motors and exhaust aftertreatment device Device, wherein described device is configured to:

Implement fill level adjusting, for adjusting exhaust aftertreatment device according to previously given fill level target value Fill level；

The pre-control that operation is adjusted for fill level；

The pre-control is adapted to according to the deviation between measured λ value and the λ value modeled.

Detailed description of the invention

Embodiment is explained in detail below by way of attached drawing.

Fig. 1 shows the motor system of the exhaust system with combustion motors and with exhaust aftertreatment device；And

Fig. 2 shows the function figures adjusted for λ used in the motor system in Fig. 1.

Specific embodiment

The present invention will be described below with the example of the motor system with combustion motors, the burning of the combustion motors is useless Gas is handled by means of the ternary catalyzing unit (Drei-Wege-Katalysator) as exhaust aftertreatment device.In ternary In catalyst converter, oxygen, which is used as, exhaust gas constituents to be stored.

Fig. 1 schematically illustrates the motor system 1 with combustion motors 2, and the combustion motors have multiple cylinder 3(In It is four cylinders in the present embodiment).Pass through air supply system (Luftzuf ü hrungssystem) 4 and passes through each cylinder Controlled intake valve on 3 conveys fresh air to cylinder 3, and by the corresponding exhaust valve on each cylinder 3 and leads to It crosses exhaust system 5 and burning waste gas is discharged from cylinder 3.

The combustion motors 2 are run in the operation of four strokes in the mode known to itself.For this purpose, starting in combustion stroke It is delivered fuel into cylinder 3 by corresponding injection valve 6 according to previously given the amount of injection before, in cylinder 3 (auszubilden) air fuel mixture is respectively constituted in combustion chamber, is lighted in the operation of four strokes during fuel stroke And combustion air fuel mixture, to promote (Vortrieb) for generating.

Exhaust system 5 has exhaust aftertreatment device 8, which can such as be configured to three-element catalytic Device.The oxidation that ternary catalyzing unit oxygen stored through reduction or in ternary catalyzing unit on three response paths carries out Nitrogen oxides, hydrocarbon and the exhaust gas constituents of carbon monoxide are converted, wherein oxygen is stored in three-element catalytic in reduction In device.The action principle of ternary catalyzing unit is known per se, and is no longer inquired into this respect to this.

In the upstream of exhaust aftertreatment device 8, it is provided with the exhaust sensor 9 of inlet side, can detect and flow from the side The oxygen content in burning waste gas crossed and the λ value of corresponding inlet side is provided, the λ value of the inlet side shows oxygen content.Useless The outlet side of gas after-treatment device 8 is disposed with the exhaust sensor 10 of outlet side, and what detection was flowed through from the side passes through purification The oxygen content of burning waste gas and exhaust sensor is supplied in the form of the λ value of outlet side.The exhaust sensor 9 of inlet side It is preferably configured as broadband exhaust gas oxygensensor, permission measures oxygen content within the scope of wide air coefficient, and the oxygen content is usually with sky The form of gas coefficient (Luftzahl) λ indicates.The exhaust sensor 10 of outlet side is preferably configured as so-called step λ sensing Device can particularly precisely measure the air coefficient λ in the range of one using the step exhaust gas oxygensensor, because outlet side The signal of exhaust sensor 10 changes to phase step type there.

Exhaust aftertreatment device 8 can be equipped with temperature sensor 11, which detects exhaust aftertreatment device 8 Temperature and provide corresponding temperature signal.

Control unit 15 is provided with to control the operation of motor system 1, control unit detection comes from motor system 1 Sensor signal, with for determining motor system state.For example, motor system state can pass through the state of motor system 1 Parameter come show its pass through sensor determine.Sensor such as can include: in air supply system 4 for detecting measurement The fresh air quantity flow sensor 12 of fresh air quantity stream, the instantaneous rotation speed of combustion motors 2, for detecting import The exhaust sensor 9 of side and outlet side λ value, 10, motor speed sensor etc..

Control unit 15 is in a way known by according to the previously given to position coder of outside (Stellgebern) manipulation carried out runs combustion motors 2.The previously given of outside can such as be based on passing through accelerator pedal (Fahrpedal) previously given driver it is expected torque.The position coder that can be manipulated can include having for previously given The injection valve of fuel quantity to be sprayed, the throttle adjustment device 13 for adjusting the supply of the air in the combustion motors 2, cylinder Each cylinder 3 in the previously given cylinder of igniter (not shown)-time of ignition with for lighting air fuel Temporal valve clearance (Ventilspiele) of mixture, intake valve and exhaust valve etc..

In control unit 14, calculating to provide motor torque has fuel quantity to be sprayed and accordingly with corresponding Mode manipulates injection valve 6, for spraying fuel quantity calculated.Meanwhile control unit 15 connects by exhaust sensor 9,10 The inlet side provided continuously and outlet side λ value λ_E、λ_AOn the basis of execute adjusting.

Functional-block diagram is shown in FIG. 2, which is illustrated in detail the work of the adjusting in motor system 1 Use principle.The adjusting is realized by fill level adjuster 22 and λ adjusting block 20 and is based primarily upon exhaust after-treatment Previously given fill level target value θ is arrived in the current fill level θ setting (einstellen) of device 8_setOn.

For ternary catalyzing unit, the fill level of exhaust aftertreatment device 8 corresponds to oxygen load It (Sauerstoffbeladung), preferably should be according to previously given moving model come the previously given oxygen load and institute State oxygen load such as be about exhaust aftertreatment device 8 possible maximum oxygen load half.

According to λ correction Δ λ previously given by fill level adjuster 22, as regulated quantity_korr, the λ adjusting block 20 provide fuel quantity correcting value r_korr, in the amount of injection computation model of the amount of injection calculation block in an appropriate manner, especially It is taken in by addition, the amount of injection computation model of the amount of injection calculation block is realized simultaneously equally in control unit 15 And calculating has fuel quantity r to be sprayed.

It, be by means of the road in path model block 21 due to not being capable of measuring the fill level θ of exhaust aftertreatment device 8 Diameter model models it.Path model generally includes input discharge model, is made of fill level model and discharge model Catalyst converter model and output discharge model.In addition to this, catalyst converter model has for calculating the flat of exhaust aftertreatment device 8 The algorithm of equal fill level θ.

Above-mentioned model is correspondingly the algorithm executed in control unit 15.Input discharge model is used for the row of inlet side The λ value λ of the inlet side of gas sensor 9_EBe converted to the O in the region for indicating the exhaust sensor 8 of inlet side₂、CO、H₂With HC's The input parameter of concentration.By being discharged in model to useless in fill level and output by input discharge model parameter calculated The concentration of the fill level of gas after-treatment device and each exhaust gas constituents on the outlet side of exhaust aftertreatment device 8 is built Mould.Output λ model in order to path model is adapted to and by each exhaust gas constituents on the outlet side of exhaust aftertreatment device 8 , with the concentration that catalyst model calculates be converted into the λ value λ of modeled outlet side_A,mod, should correspond to exhaust after-treatment λ value on the outlet side of device 8.As a result, on the one hand path model can be used at least one institute to exhaust aftertreatment device 8 The average fill level θ of modeling_modIt carries out modeling and on the other hand can be used in providing the λ value of modeled outlet side λ_A,mod。

By means of required value filter 23 to fill level target value θ_setCarry out pre-filtering.It is used as instruction parameter (F ü Hrungsgr e), fill level target value θ by pre-filtering_set,filt, on the one hand manipulation pre-control and another now Aspect manipulates fill level and adjusts (F ü llstandsregelung).λ adjust be substantially based on fill level adjusting as a result, In It is filled previously given filtered fill level target value θ when Level tune_set,filtOr fill level target value rail Mark θ_set,trj.Fill level adjusts based on difference, particularly is based on filtered fill level target value θ_set,filtWith asking The average fill level θ modeled of acquired (ermitteln) in poor element 25_modBetween difference.Fill level adjusts energy It is enough by means of more particularly to being configured to the fill level adjuster 22 of pi regulator to implement and as regulated quantity (Stellgr E) Δ λ is corrected to export λ_korr.Thus the average fill level θ that will be modeled by means of path model_modIt is adjusted to fill Horizontal target value θ_set, a possibility that fill level target value will be broken through towards oil-poor (mager) and rich oil (fett), also It is to be minimized a possibility that leaving catalyst converter window and realize the smallest discharge like this.

Pre-control carries out in pre-control clamp dog 24, on the one hand which provides pre-control λ value λ_vst, and another party Face, which provides, depends on filtered fill level nominal value θ_set,filtTarget fill level-track θ_set,trj.In order to calculate With filtered fill level target value θ_set,filtCorresponding pre-control λ value λ_vst, pre-control clamp dog 24 includes and path model The corresponding physical model of opposite path model is namely that previously given fill level distributes temporary pre-control λ value λ'_vstModel.

If the λ signal λ of inlet side_EIt is distorted by bias, then in pre-control λ value λ_vstIn consider λ offset value delta λ_off, method especially: by λ offset value delta λ_offIt is added to temporary pre-control λ value λ '_vstOn.

In order to calculate the target fill level track being physically able to achieve, and use the second path mould with identical parameters Type (copy), second path model have pre-control λ value λ as input λ_vst.This has the advantages that only useless The practical fill level of gas after-treatment device 8 modeled by means of path model deviates target fill level track θ_set,trj When, fill level adjuster 22 must just intervene.

Thus not only correction but also is adapted to target fill level track pre-control λ value.

When path model is by the λ value λ of the inlet side before exhaust aftertreatment device 8_EIt is converted into exhaust aftertreatment device 8 (average) the oxygen fill level θ modeled_modWhen, the opposite path model of pre-control clamp dog 24 is by filtered filling water Flat target value θ_set,filtCorresponding target λ (temporary pre-control λ value λ ' before being scaled exhaust aftertreatment device 8_vst).

In order to establish (erstellen) opposite path model it is preferred that making the path by parsing (analytisch) The path model of model block 21 inverts (invertiert).However, common exhaust aftertreatment device 8 is the path with time-varying The complicated nonlinear path of parameter, the path is typically only by nonlinear differential equation group (Differentialgleichungssystem) it indicates.This typically results in the equation group of the path model for reversion not It can solve resolvedly.

Therefore, the alternative solution as the reversion of the parsing of path model, path model can be arranged uses digital representation Reversion.This is based on following processing mode, it may be assumed that iteratively (iterativ) is the previously given inlet side of existing path model λ value, for being obtained average fill level corresponding, for exhaust aftertreatment device 8 by means of the path model Numerical value, the numerical value correspond to desired fill level target value θ_setOr filtered fill level target value θ_set,filt。 If this model value and fill level target value θ_setOr filtered fill level target value θ_set,filtIt is identical, then Iteratively the λ value of previously given inlet side is exactly following numerical value, it is necessary to pre-control is carried out with the numerical value, for reaching mesh Mark-oxygen fill level.

Therefore, in order to be converted (Umsetzung), previously given parameter having the same and initial identical state become The second path model (copy) of amount and always with the λ value of variable outlet side come iteration, until passing through the second path model The practical fill level and desired fill level target value θ calculated_setOr filtered fill level target value θ_set,filtBetween difference quantitatively (betragsm ig) it is sufficiently small, with for realizing pre-control by required by iteration Precision.The numerical value of the λ value for inlet side so found is used as temporary pre-control λ value λ '_vst。

The pre-control λ value λ of pre-control clamp dog 24_vstΔ λ is corrected with the λ of fill level adjuster 22_korrIn summator 26 Sum and represent with signal the target λ value λ of the λ value for inlet side_soll.In addition to pre-control λ value λ_vstExcept, it is described pre- Control also obtains the target fill level track θ for being used for fill level adjuster 22_set,trj。

Due to path model input parameter may with uncertain and path model may also inaccuracy, so can Size that the fill level θ of exhaust aftertreatment device 8 can occur, being modeled by means of path model with it is corresponding true (real) the deviation between size.In order to compensate for uncertainty, fill level that can correspondingly to exhaust aftertreatment device 8 The adjusting based on model of θ is adapted to.Such as it can be by being carried out for fill level adjusting and/or the intervention of pre-control The adaptation.

When there are suitable service condition, in the λ value λ of the outlet side modeled by means of path model_A,modWith surveyed The λ value λ of the outlet side of amount_ABetween deviation on the basis of be adapted to.If two values are different, have especially differed than pre- , then there is adaptation demand in the first big amplitude of given threshold value.

Advantageously, with the λ offset value delta λ for the scale that represent for being adapted to demand_offCome to the λ value for inlet side Target λ value λ_sollIt is corrected with acquired target fill level track.This be used to be adapted to the scale of demand from by In the λ value λ for the outlet side that path model is modeled_A,modWith the λ value λ of measured outlet side_ABetween difference in especially as Its difference is used as λ offset value delta λ_offTo generate.

Pass through the target λ value λ for the λ value for inlet side_sollCorrection, λ adjusting can be directly to λ deviant Δλ_offVariation react.Because not being adapted to the path model, what is more specifically modeled is averaged Fill level θ_modDeviate actual fill level, but because equally to target fill level target value track θ_set,trjInto Row adaptation, so target fill level target value track follows being modeled for mistake (falschen) of the path model Fill level θ_mod, so that the fill level adjuster 22 sees identical adjusting deviation before and after adaptation.Thus The step of adjusting deviation is avoided, the step may cause the upper pendulum (Aufschwingen) of fill level adjusting.

Advantageously, smoothly being used to be adapted to the scale of demand by means of the filter in adapter block 27, namely by institute The λ value λ of the outlet side of modeling_A,modWith the λ value λ of measured outlet side_AThe difference of composition, for obtaining λ offset value delta λ_off。 For example, the filter can be configured to PT1 filter and can have the time constant depending on operating point, the time Constant can such as be learnt from corresponding in the characteristic field of parametrization.Integral can be optionally arranged after the filter Device, for considering to influence for a long time.In (eingeschwungenen) state of starting of oscillation, filtered signal corresponds to λ Offset value delta λ_offAnd since the uncertainty of the λ value of inlet side and the inaccuracy of path model thus correspond exactly to Adaptation demand.

It can provide, be only just filtered in adapter block 27 when there are suitable on-condition.Therefore, in order to It is enough rapidly to compensate inaccuracy, it can provide, especially always can require stoichiometry under conditions of less limitation The filter is allowed to implement when mixture and when showing exhaust gas λ in the range of being in 1 by the exhaust sensor of outlet side Adaptation.In addition, can provide, only just implement adaptation when the signal of the exhaust sensor of outlet side 10 is reliable.

Additionally, it is desirable for saving adaptation value when travelling end cycle and being incited somebody to action for next driving cycle Corresponding adaptation value is used as original value.

Adaptation demand may have a variety of causes being difficult to differentiate between in the method.However, coming for fill level adjusting It says, does not need to distinguish, because only should quickly and accurately be adjusted to fill level to discharge optimal target filling water It is flat.If being distinguished between the reason of causing adaptation demand in one or more other functions, advantageously, In Occur on the position of the reason to adaptation demand, the share that can clearly distribute is corrected.

For example, the diagnosis of the λ offset for the λ value for inlet side can be there are on-condition appropriate Perhaps input signal in adapter block 27 is assessed, with the offset for the λ value in inlet side and letting out in exhaust system 5 It is distinguished between leakage.With the offset of the λ value of the inlet side identified herein, the reality of exhaust sensor 9 can be corrected Border λ signal.In order not to doubly consider this correction, it is necessary to subtract the λ of corresponding inlet side from the content of adapter block 27 Offset value delta λ_off。