CN109707521A - Method for determining the cylinder intake of internal combustion engine, the internal combustion engine have variable stroke of valve device - Google Patents
Method for determining the cylinder intake of internal combustion engine, the internal combustion engine have variable stroke of valve device Download PDFInfo
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- CN109707521A CN109707521A CN201811251499.8A CN201811251499A CN109707521A CN 109707521 A CN109707521 A CN 109707521A CN 201811251499 A CN201811251499 A CN 201811251499A CN 109707521 A CN109707521 A CN 109707521A
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- value
- cylinder intake
- combustion engine
- model
- internal combustion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
-
- 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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
- F02D2041/1436—Hybrid model
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Method for determining the cylinder intake of internal combustion engine (10), the internal combustion engine has variable stroke of valve device, wherein the first cylinder intake value is determined by means of the first cylinder intake model, and the second cylinder intake value is determined by means of the second cylinder intake model, wherein, the cylinder intake value of correction is determined by the first and second cylinder intakes value by means of weight coefficient (F), and the control of the cylinder intake of internal combustion engine (10) is implemented according to the cylinder intake value of the correction.
Description
Technical field
The present invention relates to a kind of methods of cylinder intakes according to independent claims, for determining internal combustion engine, this is interior
Combustion engine has variable stroke of valve device.In addition, the computer program is arranged for the present invention relates to a kind of computer program
Implement one of the method.
Higher and higher is become for requirement of the Modern Internal-Combustion Engine in terms of reducing fuel consumption and Exhaust emissions are discharged.
The electric control of internal combustion engine.The control of fuel especially to be sprayed, the control of ignition angle to be regulated and/or sky to be batched
The control of gas filling is more and more accurately determined necessary for these requirements are met.For control the internal combustion engine, most
Important parameter is the parameter of air filling herein.This is generally by means of the hot diaphragm type air amount sensor being specially arranged thus
(HFM) it determines.
Background technique
2,013 213 310A1 of DE10 disclose it is a kind of for being adapted to cylinder-intake airflow dynamics model method, the cylinder-into
Gas model is used for the internal combustion engine of vehicle, and the vehicle has variable stroke of valve, wherein the method includes (a) in air inlet pipe
Measure the first pressure before air throttle；(b) second pressure of the measurement after air throttle；(c) the air matter of sucking is calculated
Flow is measured, by means of the opening model of difference and air throttle between the second pressure and the first pressure；(d) adaptation institute
Cylinder-intake airflow dynamics model is stated, by means of air quality flow calculated.
Summary of the invention
The present invention relates to a kind of for controlling the method and apparatus at least partly capableing of the booster of electricity operation, the pressurization
Device is used for the motor vehicle with internal combustion engine, and a kind of computer program on a storage medium, and the computer program is for holding
Row the method.Advantageous modification is the theme of dependent claims.
In a first aspect, the internal combustion engine has can the present invention relates to the method for determining the cylinder intake of internal combustion engine
The stroke of valve device of change, wherein the first cylinder intake value is determined by means of the first cylinder intake model, and the second cylinder
Air-entry value is determined by means of the second cylinder intake model, wherein the cylinder intake value of correction is by first and second gas
Cylinder air-entry value is determined by means of weight coefficient, and the control of the cylinder intake of internal combustion engine according to the cylinder of the correction into
Gas value is implemented.
Because described two models have determined excessively high for the cylinder intake in the region for their inaccuracy
Value, so particularly advantageously, the cylinder intake value of correction can be determined by means of weight coefficient.In addition, therefore can
Sensor, such as hot diaphragm type air amount sensor (HFM) or the air flow sensor (PFM) based on pressure are abandoned, thus
Cost can be saved.The determination of the air filling of the cylinder shows good by means of the first and second cylinder intake models
Accuracy.
Advantageously, the weight coefficient is according to the first cylinder intake model value and the second cylinder intake model
The relative deviation and the second cylinder intake value of the model difference deviation of value and the first cylinder intake value and testing stand measured value
It is determined with the relative deviation of the testing stand measured value.Therefore, the weight coefficient can be in a simple manner by first
It is determined with the deviation of the second model.
The first cylinder intake model is determined based on the volume of cylinder in air inlet finish time.This calculating can
It is easily calculated with saving resource and in the controller.
The second cylinder intake model is determined based on the air quality flow by the intake valve.This is calculated
It is easily calculated resource can be saved and in the controller.
Advantageously, the control of the cylinder intake of the internal combustion engine is by means of the volume for the variable stroke of valve device
The adjusting of fixed-stroke of valve carries out, because therefore can be realized the good service ability (Lauff higkeit) of internal combustion engine.This
Outside, the harmful emission in burning can be reduced by accurately adjusting cylinder intake.It therefore can be based on optimization
Mixture prepares to generate the good service ability of internal combustion engine, because the air filling of the cylinder can be carried out more accurately
It calculates.
Particularly advantageously, the internal combustion engine is controlled by means of the cylinder intake value of correction, it is preferably variable by adjusting
Stroke of valve or pass through opening throttle.
In in a further aspect, the present invention relates to a kind of equipment, especially a kind of control unit and computer program, they
It is set, is especially programmed for implementing one of the method.In another aspect, the present invention relates to a kind of machines to read
The storage medium taken is stored with the computer program on the storage medium.
Detailed description of the invention
Next the present invention is further described referring to attached drawing and by means of embodiment.It is shown here:
The explanatory view of Fig. 1 motor vehicle 1, the motor vehicle have internal combustion engine,
Fig. 2 shows the relative deviation of traditional model and testing stand measured value,
Fig. 3 shows the relative deviation of " obstruction "-model Yu testing stand measured value,
Fig. 4 shows the method by means of the illustrative process of flow chart in the first embodiment.
Specific embodiment
Fig. 1 shows internal combustion engine 10 in illustrative view, which has fresh air conduit 60, new by this
Internal combustion engine 10 described in fresh air conduit is supplied to air 50, and has waste gas duct 70, is being flowed by the waste gas duct
Exhaust gas 51 in direction in the internal combustion engine 10 by being discharged.The view is limited to the subsequent of relevant component herein and shows.
In the fresh air conduit 60, is seen in the flow direction of air 50 and arrange following apparatus: air filtration
Device 1, fresh air quantity sensor 2, preferably hot diaphragm type air amount sensor (HFM), the compressor 4 of exhaust-driven turbo-charger exhaust-gas turbo charger 9, increasing
Press aerial cooler 5, first pressure sensor 6, air throttle 7 and second pressure sensor 8.First and second pressure sensing
Device 6；8 with being additional to pressure signal temperature T1With temperature T2.Separated temperature sensor can be also set, or made
With separated temperature model.
Furthermore the internal combustion engine 10 includes variable promotion valve-regulated devices not shown further, promotion valve regulation dress
Set the stroke of the intake & exhaust valves for adjusting the internal combustion engine 10.By means of position sensor 11, the valve can determine
Stroke.In addition, the internal combustion engine 10 includes the phase detector 12 for determining camshaft location.The pressure sensor 6；
8 through determining signal, the position sensor 11 for promoting valve-regulated devices through determining signal and the camshaft
Phase detector 12 is received and is stored by controller 100 through determining signal.The transmitting of the signal herein preferably it is wired or
Person wirelessly carries out.
In the waste gas duct 70, arranged down by the internal combustion engine 10 along the flow direction of the exhaust gas 51
State device: exhaust gas turbine 13, the first lambda sensor (Lambdasonde) 14, oxidation catalyzer of exhaust-driven turbo-charger exhaust-gas turbo charger 9
(DOC) 15 and the second lambda sensor 16 thereafter.By means of the lambda sensor 14；16 oxygen that can study the exhaust gas contain
Amount.The signal determined by the lambda sensor is preferably received and is stored by controller 100.The transmission of the signal preferably has herein
Line wirelessly carries out.
In the upstream of the exhaust gas turbine 13 of the exhaust-driven turbo-charger exhaust-gas turbo charger 9, i.e. in the high-pressure side of the waste gas duct 70, by
70 bifurcated of waste gas duct goes out an exhaust gas recycling pipe 24, the exhaust gas recycling pipe the upstream of the internal combustion engine 10 simultaneously
And it is imported in the fresh air conduit 60 in the downstream of the air throttle 7.In the downstream of the internal combustion engine 10, along described useless
Gas recycling pipe arranges HD-AGR- valve 23, HD-AGR- cooler 22 and HD-AGR- bypass 21.The exhaust gas returns reference
In the emission for reducing the internal combustion engine 10.
The internal combustion engine 10 is configured to the internal combustion engine of 4 cylinders in following example.4 cylinder respectively includes at least one not
Further visible intake & exhaust valves in the accompanying drawings.The method can especially be transferred to the cylinder with other quantity
Internal combustion engine is especially transferred to the internal combustion engine with 1,2,3,6 and 8 cylinders.
By means of statistical test plan (design of test), can determine at testing stand in experimental rig
(Versuchsaufbau) cylinder intake at.The true measurement for coming from statistical test plan is turned based on engine herein
Speed, the cam phase of intake & exhaust valves, suction press and stroke of valve.True measurement herein by means of multiple measurement points,
It is preferred that 3000, be determined under different operating statuses or under the operation parameters of internal combustion engine 10.It is preferred that the engine
Revolving speed, the camshaft phase of intake valve, the camshaft phase of exhaust valve, suction press and the internal combustion engine stroke of valve belong to
The operation parameters.These are really measured in the characteristic field being stored in controller 100, and therefore can be used for it at any time
His calculating.For saving hot diaphragm type air amount sensor (HFM) at high cost, attempt to determine gas by means of model calculating
Cylinder air inlet.The then measurement and the modelling of the first and second cylinder intake models of the test plan of Research statistics under study for action
The consistency of measured value.Two are then now proposed for modeling the model of the cylinder intake.One is traditional mould
Type is the other is " obstruction " model (" Choke "-Modell).
There are different methods to be determined for model thus.First model is based on the volume of cylinder in air inlet finish time
Determine the air filling of the cylinder, and the second model determines the gas based on the air quality flow by the intake valve
The air of cylinder is filled.Show in directly relatively the first model (model be otherwise known as now conventional model) with when really measuring
Out, it is filled by the air that the conventional model calculates and true measurement is consistent well, when the pressure in the cylinder
When nearly corresponding to the pressure in the air inlet pipe.Otherwise, traditional model returns the value excessively high for cylinder charge.
Second model (next the model is referred to as " obstruction-model " now) shows good with the true measured value
Good consistency, when there is by intake valve, sufficiently high pressure drop.That is the pressure in the air inlet pipe is high
In the pressure in the cylinder.Otherwise " obstruction-model " returns the value excessively high for cylinder intake.Because described two
Any of a model cannot all be formed separately at the genuine property of on whole service region, cylinder air filling,
So a kind of method is provided below, this method is determined the more accurate air for the cylinder by described two models
Filling.
Fig. 2 shows the opposite deviation of the value of following values and testing stand measurement in the graph, which passes through conventional model
It is determined.
Model difference deviation is depicted on the abscissa of the chart.This is preferably calculated according to following formula:
Wherein, the value of conventional model be "", the value of " obstruction "-model be "”。
The opposite of the value for being associated with this measured by value and testing stand that conventional model calculates is depicted on the vertical scale
Deviation.This preferably corresponds to the difference between the value and test value of the modelling of conventional model divided by the test value.By horizontal seat
Scale value is equal to zero direction set out along positive abscissa value, shows good one between test value and the value of conventional model
Cause property.Along the direction of negative abscissa value being equal to zero by abscissa value, show test value and the value of conventional model it
Between increase deviation.
Fig. 3 shows the relative deviation of the value of the value and testing stand measurement that are determined by means of " obstruction "-model in the graph.
Model difference deviation is depicted on the abscissa of the chart.This is preferably calculated according to following formula:
Wherein, the value of conventional model be "", the value of " obstruction "-model be "”。
The phase of the value for being associated with this measured by the value that " obstruction "-model calculates with testing stand is depicted on the vertical scale
To deviation.This preferably corresponds to blocking " difference between the value and test value of the modelling of-model is divided by the test value.By
Abscissa value is equal to zero direction set out along negative abscissa value, shows good between test value and " obstruction "-model value
Good consistency.Along the direction of positive abscissa value being equal to zero by abscissa value, show in test value and obstruction "-mould
The deviation of increase between offset.It can recognize that, conventional model and " obstruction "-model are shown for relative model error
Mutually opposite characteristic, the model error are applied relative to model difference deviation.It therefore illustrates in the following embodiments
A kind of method, this method are determined the correction for cylinder intake according to weight coefficient by described two model values in an advantageous manner
Value.
The exemplary processes of the method in the first embodiment are shown by means of process in Fig. 4.
In first step 500, under the operating status of the internal combustion engine 10, for cylinder intake the first value by means of
Conventional model is determined.Thus camshaft location, suction press, intake air temperature, exhaust back pressure, exhaust gas
Temperature, throttle position, boost pressure operation parameters and engine speed are used.
Additionally, it is determined for another value of cylinder intake by means of " obstruction "-model.For this purpose, camshaft location
, operation parameters of suction press, intake air temperature, exhaust back pressure, exhaust gas temperature and engine speed, valve
Stroke and air quality flow are used.Described parameter is respectively present in controller 100, and can be used in the meter
It calculates.In step 510, by for the cylinder intake the first value (being determined by means of conventional model) and for cylinder into
The second value (being determined by means of " obstruction-model ") of gas determines the value for the model difference deviation.Model difference
Deviation is proceed as follows determination:
By means of the model difference deviation by determining weight coefficient C in characteristic field1, which has been stored in the control
In device 100.This is used for weight coefficient C1Characteristic field according to the model difference deviation of opposite model error and two models
It is determined, is determined preferably by means of program (Fitprogramm) is adapted to.It is preferred that the information of the characteristic field is vehicle
Specifically, or for volume production vehicle storage in controller 100.Weight coefficient C1It is preferred that being so determined, so that it is right
In following formula by described two models determine for the cylinder intake F as far as possible accurately value.
(1)。
Weight coefficient C1The value between 0 and 0.5 is used preferably for the negative value of the model difference deviation, for described
The positive value of model difference deviation is using the value between 0.5 and 1, so that the characteristic field for the weight coefficient shows s
The function of shape.
Weight coefficient c1Depending on the model difference deviation using value between zero and one, so that formula (1)
Utilize weight coefficient c1Always correct air is calculated by described two models to fill.
In step 530, the weight coefficient c that utilization determines in step 5201By the value and " obstruction-mould of conventional model
The value of type " determines the air Filling power F of correction.This calculating is executed preferably also by controller 100.
The control of the internal combustion engine 10 is executed by means of the air Filling power (F) of correction in step 540.The internal combustion
The control of machine 10 is preferably executed by the previously given nominal air filling for cylinder.The adjusting of the nominal air filling
It can for example be executed by the previously given stroke for the cylinder.The nominal air filling is scaled thus for institute
The stroke of cylinder correctly filled is stated, and thus adjusts variable poppet valve device.Then, the method can be in step
Continue in 500.
Claims (9)
1. the method for the cylinder intake for determining internal combustion engine (10), the internal combustion engine have variable stroke of valve device, wherein the
One cylinder intake value is determined by means of the first cylinder intake model, and the second cylinder intake value by means of the second cylinder into
Gas model is determined, which is characterized in that the cylinder intake value of correction is by the first and second cylinder intakes value by means of power
Weight coefficient (c1) be determined, and the control of the cylinder intake of internal combustion engine (10) is according to the cylinder intake value (F) of the correction
Implemented.
2. the method according to claim 1, wherein the weight coefficient (c1) according to first cylinder intake
The model difference deviation and the first cylinder intake value and testing stand of model value and the second cylinder intake model value measure
The relative deviation of value and the second cylinder intake value and the relative deviation of the testing stand measured value are determined.
3. method according to any of the preceding claims, which is characterized in that the first cylinder intake model is based on
It is determined in the volume of cylinder of air inlet finish time.
4. method according to any of the preceding claims, which is characterized in that the second cylinder intake model is based on
It is determined by the air quality flow of intake valve.
5. the method according to claim 1, wherein the control of the cylinder intake of the internal combustion engine (10) by means of
The adjusting of specified-stroke of valve for the variable stroke of valve device carries out.
6. the method according to claim 1, wherein being controlled by means of corrected cylinder intake value in described
Combustion engine preferably passes through the adjusting of variable stroke of valve or the opening by air throttle.
7. computer program, which is arranged for, and implements side according to any one of claim 1 to 6
Method.
8. the storage medium of electronics has computer program according to claim 8.
9. equipment, especially control unit (100), which is arranged for implementing according to claim 1 to any in 6
Method described in.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017219175.9 | 2017-10-26 | ||
| DE102017219175.9A DE102017219175A1 (en) | 2017-10-26 | 2017-10-26 | Method for determining a cylinder charge of an internal combustion engine with a variable valve lift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109707521A true CN109707521A (en) | 2019-05-03 |
| CN109707521B CN109707521B (en) | 2022-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811251499.8A Active CN109707521B (en) | 2017-10-26 | 2018-10-25 | Method for determining cylinder air charge of internal combustion engine with variable valve stroke device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109707521B (en) |
| DE (1) | DE102017219175A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022203721A1 (en) | 2022-04-13 | 2023-10-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for determining an exhaust gas mass flow returned to an internal combustion engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040250782A1 (en) * | 2002-09-25 | 2004-12-16 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine having variable valve actuation device and method of calculating intake amount in the same internal combustion engine |
| CN1977100A (en) * | 2005-01-13 | 2007-06-06 | 丰田自动车株式会社 | Controller of internal combustion engine |
| CN101353988A (en) * | 2007-07-27 | 2009-01-28 | 罗伯特.博世有限公司 | Methods and apparatus for operating combustion engine |
| JP2009024671A (en) * | 2007-07-23 | 2009-02-05 | Honda Motor Co Ltd | Control device for internal combustion engine having cylinder cut-off mechanism |
| CN102472182A (en) * | 2009-07-07 | 2012-05-23 | 欧陆汽车有限责任公司 | Method and device for operating an internal combustion engine |
| CN105934576A (en) * | 2014-01-17 | 2016-09-07 | Fev有限责任公司 | Model-based cylinder charge detection for an internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013213310B4 (en) | 2013-07-08 | 2020-08-06 | Bayerische Motoren Werke Aktiengesellschaft | Process for controlling internal combustion engines with variable valve control |
-
2017
- 2017-10-26 DE DE102017219175.9A patent/DE102017219175A1/en active Pending
-
2018
- 2018-10-25 CN CN201811251499.8A patent/CN109707521B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040250782A1 (en) * | 2002-09-25 | 2004-12-16 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine having variable valve actuation device and method of calculating intake amount in the same internal combustion engine |
| CN1977100A (en) * | 2005-01-13 | 2007-06-06 | 丰田自动车株式会社 | Controller of internal combustion engine |
| JP2009024671A (en) * | 2007-07-23 | 2009-02-05 | Honda Motor Co Ltd | Control device for internal combustion engine having cylinder cut-off mechanism |
| CN101353988A (en) * | 2007-07-27 | 2009-01-28 | 罗伯特.博世有限公司 | Methods and apparatus for operating combustion engine |
| CN102472182A (en) * | 2009-07-07 | 2012-05-23 | 欧陆汽车有限责任公司 | Method and device for operating an internal combustion engine |
| CN105934576A (en) * | 2014-01-17 | 2016-09-07 | Fev有限责任公司 | Model-based cylinder charge detection for an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109707521B (en) | 2022-09-09 |
| DE102017219175A1 (en) | 2019-05-02 |
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