EP2430298A1 - Estimation de la concentration en oxydes d ' azote d ' un moteur a combustion interne - Google Patents
Estimation de la concentration en oxydes d ' azote d ' un moteur a combustion interneInfo
- Publication number
- EP2430298A1 EP2430298A1 EP10728732A EP10728732A EP2430298A1 EP 2430298 A1 EP2430298 A1 EP 2430298A1 EP 10728732 A EP10728732 A EP 10728732A EP 10728732 A EP10728732 A EP 10728732A EP 2430298 A1 EP2430298 A1 EP 2430298A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- output parameter
- cylinder
- combustion
- pse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 87
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title description 24
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000002123 temporal effect Effects 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims description 29
- 239000000446 fuel Substances 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000007620 mathematical function Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/028—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the combustion timing or phasing
-
- 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
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
- F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
- F02D41/1462—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
-
- 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
- F02D41/1497—With detection of the mechanical response of the engine
-
- 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
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
-
- 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
- F02D2041/1413—Controller structures or design
- F02D2041/1418—Several control loops, either as alternatives or simultaneous
- F02D2041/1419—Several control loops, either as alternatives or simultaneous the control loops being cascaded, i.e. being placed in series or nested
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- 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
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/144—Sensor in intake manifold
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
Definitions
- the invention relates to the estimation and regulation of at least one output parameter of an internal combustion engine comprising a plurality of cylinders.
- the invention relates to the estimation of an output parameter of the internal combustion engine made from a measurement of the internal pressure of a cylinder of the engine, as well as the regulation of this output parameter from of this estimate.
- One of the aims of the invention is therefore to provide a system and a method for estimating an output parameter of the motor using a minimum of direct measurements of engine states and with a minimum of variable calculations.
- Another object of the invention is to provide a system and method for regulating an engine output parameter from its estimate.
- a system for estimating at least one output parameter of an internal combustion engine comprising at least one cylinder, a movable piston driven via a crankshaft, means for measuring the temporal variations of the crankshaft angle and the internal pressure of said cylinder.
- the system comprises calculating means for calculating a plurality of combustion parameters, such as internal cylinder pressures characteristic of the combustion, internal cylinder pressure variations and engine cycle times, from said measurements of the combustion engine. crankshaft angle and internal cylinder pressure and estimating means for estimating at least one engine output parameter from said combustion parameters.
- the measurement of the internal pressure of the cylinder can be carried out by means of a pressure sensor.
- a pressure sensor may be equipped with such a pressure sensor or, more simply, only one of the engine cylinders.
- the characteristic output parameters of the engine can be selected from pollutant emissions, combustion noise, fuel consumption, the engine torque and in general all the parameters which represent a state emitted directly or indirectly by combustion in the engine.
- the estimating means estimates at least one output parameter of the motor from a weighted sum of said combustion parameters.
- an estimation means is provided that is simple and requires little calculation.
- the system may comprise means for measuring a quantity of oxygen admitted into the engine and the calculation means is capable of calculating said combustion parameters from, in addition, the quantity of oxygen admitted into the engine.
- the system may also include means for measuring a fuel flow admitted into the engine and the calculating means is adapted to calculate said combustion parameters from, in addition, the fuel flow admitted into the engine.
- the system may further comprise means for measuring a flow of fresh air admitted into the engine and the calculating means is able to calculate said combustion parameters from, in addition, the fresh air flow admitted into the engine.
- a device for regulating an output parameter of an internal combustion engine comprising means for developing an instruction of the output parameter of the engine, an actuator able to control the output parameter of the engine. engine, an estimation system for estimating the output parameter of the engine, the control device being able to develop a command for said actuator from a difference between said setpoint and said estimate of the output parameter of the engine in order to regulate the output parameter of the motor.
- a means for closed-loop control of an output parameter of the engine via a measurement of the internal cylinder pressure makes it possible to adapt the settings concerning the emission standards according to each engine, and thus to reduce dispersions from one engine to another during their manufacture.
- This reduction of the dispersion of the engines makes it possible to reduce the margins of safety of the manufacturers and in particular to size as much as possible the systems of after-treatment of the pollutant emissions, and advantageously to reduce their volume.
- the devices for post-treatment of pollutant emissions generally include precious metals, such a reduction in their volume allows a saving on the cost of a vehicle.
- the device comprises means for developing a control setpoint of said actuator and means for calculating a control difference, between said command setpoint and said elaborate control, intended for said actuator.
- a method for estimating at least one output parameter emitted by an internal combustion engine comprising at least one cylinder, a mobile piston driven via a crankshaft, comprising a step measuring the temporal variations of the crankshaft angle and the internal cylinder pressure.
- This method comprises a step of calculating a plurality of combustion parameters, such as internal cylinder pressures characteristic of the combustion, internal cylinder pressure variations and engine cycle times, from said measurements of the combustion engine. angle of the crankshaft and the internal pressure of said cylinder and a step of estimating the engine output parameter from said combustion parameters.
- a step of calculating a plurality of combustion parameters such as internal cylinder pressures characteristic of the combustion, internal cylinder pressure variations and engine cycle times, from said measurements of the combustion engine. angle of the crankshaft and the internal pressure of said cylinder and a step of estimating the engine output parameter from said combustion parameters.
- it is estimated at least one output parameter of the engine from a calculation of a weighted sum of said combustion parameters.
- the method may comprise a step of measuring an oxygen quantity admitted into the engine, and during the calculation step, said combustion parameters are calculated from, in addition, the quantity of oxygen allowed in the engine. engine.
- the method may also include a step of measuring a fuel flow admitted into the engine, and during the calculation step, said combustion parameters are calculated from, in addition, the fuel flow admitted into the engine.
- the method may further comprise a step of measuring a flow rate of fresh air admitted into the engine, and during the calculation step, the combustion parameters are calculated from, in addition, the admitted fresh air flow rate. in the engine.
- a method for regulating an output parameter of an internal combustion engine comprising developing an engine output parameter setpoint, estimating the output parameter of the engine, and a regulation of the engine output parameter from a difference between said setpoint and said estimate of the output parameter of the engine.
- a command is developed for an actuator controlling the output parameter of the motor, and a command setpoint of the actuator is furthermore developed and a control difference is calculated between said setpoint of the actuator. command and said elaborate command for said actuator.
- FIG. 1 illustrates an embodiment of a system for estimating at least one output parameter of an internal combustion engine
- FIG. 2 illustrates an embodiment of a device for regulating an output parameter of an internal combustion engine
- FIG. 3 illustrates another embodiment of a device for regulating an output parameter of an internal combustion engine.
- FIG. 1 diagrammatically shows a system for estimating at least one output parameter of an internal combustion engine 1.
- the characteristic output parameters of the engine 1 can be chosen from pollutant emissions, combustion noise, fuel consumption, engine torque and, in a general manner, all the parameters that represent a state emitted directly or indirectly by the combustion. in the engine 1.
- such an estimation system could be used to estimate a rate of nitrogen oxides emitted during combustion in the engine 1.
- the internal combustion engine 1 comprises a cylinder 2 in which a piston 3 moves by means of a connecting rod 4 connecting the piston 3 to a crankshaft 5 driving the rod 4.
- a combustion chamber 6 is delimited by said cylinder 2, said piston 3 and a cylinder head 7.
- the cylinder head 7 is provided with at least two valves 8 and 9 which make it possible to connect the combustion chamber 6 with respectively an intake manifold 10, for possibly air
- the engine 1 also includes a fuel injector 12 arranged to inject fuel into the combustion chamber 6.
- the estimation system comprises two measurement sensors 20, 21 and an electronic control unit 22 (ECU) which comprises a calculation means 23 and an estimation means 24.
- ECU electronice control unit 22
- These means 23, 24 may be included in a software form or in the form of logic circuits embedded in the ECU 22.
- the sensor 21 makes it possible to measure at any moment the angle of the crankshaft ⁇ .
- the sensor 20 makes it possible to measure at any instant the internal pressure P cy ⁇ of the cylinder 2 which corresponds to the pressure inside the combustion chamber 6.
- These sensors 20 and 21 each emit a temporal measurement signal, transmitted respectively by connections 25 and 26, towards the calculation means 23.
- the estimation system may comprise other measuring means 27 to 29 of engine state variables to specify the estimate of the output parameter of the engine PSe.
- the estimation system may comprise, the measuring means 27 for measuring a quantity of oxygen admitted into the engine 1, the measuring means 28 for measuring a fuel flow admitted into the engine 1 and the measuring means 29 for measuring a flow rate of fresh air admitted into the engine 1.
- the measuring means 27 of the quantity of oxygen admitted into the engine 1 may be an oxygen sensor located in intake manifold 10 or in the exhaust gas manifold 1.
- the measurement of the fuel flow admitted into the engine 1 may be a fuel setpoint sent to the injector 12.
- the measuring means 29 of the fresh air flow admitted into the engine 2 may be an air flowmeter located on the intake manifold 10, preferably upstream of the recovery of a portion of the exhaust gas.
- the calculation means 23 makes it possible to calculate a certain number of combustion parameters Xi from the input time signals ⁇ , Pcyi. Moreover, this calculation means 23 can also calculate the combustion parameters Xi from the additional time signals. from the measuring means 27 to 29.
- the combustion parameters Xi may be chosen from the moment of start of combustion, the duration of the combustion, the internal pressure of the maximum cylinder, the angle of the crankshaft for which the maximum pressure in the cylinder, the angle of the crankshaft for which a given fraction of the fuel has been burned, the temperature of the exhaust gases, the pressure of the gases to the exhaust. Other parameters may be envisaged insofar as they are in direct or indirect relation with the combustion phase in the cylinder.
- the combustion parameters Xi are chosen as being only values characteristic of the internal pressure of the cylinder such as internal cylinder pressures characteristic of the combustion P cy ii, internal pressure variations of the cylinder VP cy ii and times engine cycle t cycle i.
- the internal cylinder pressures characteristic of the combustion P cy ii may be, for example, the internal pressure of the maximum cylinder P cy imax, the internal pressure of the cylinder at the instant of start of combustion, the internal pressure of the cylinder for an angle of the crankshaft characteristic of the combustion (ie an angle for which a given fraction of the fuel has been burned), the internal pressure of the cylinder when the angle of the crankshaft is equal to 80 ° after the top dead center of the piston.
- crankshaft angles characteristic of the combustion are well known to those skilled in the art and are generally calculated as a function of the apparent energy release in the cylinder.
- the internal pressure variations of the cylinder VP cy ii may be, for example, the maximum gradient of the cylinder internal pressure, the minimum gradient of the cylinder internal pressure (VP cy i) min , the maximum gradient of the internal pressure of the cylinder. cylinder between the first piloted injection and the injection at the beginning of combustion.
- the engine cycle of time t cyc i e i can be, for example, the time between CA05 and CA50, or the time between CA05 and CA90, or the time between CA05 and the time when the internal pressure of maximum cylinder is reached, or the time during which the internal pressure of the cylinder is greater than a threshold, or the time during which the internal pressure of the cylinder is equal to the
- CAx references correspond to the corners of the crankshaft where x% of the fuel has been burned.
- the calculation means 23 is able to sample the measurements of the internal pressure of the cylinder P cy ⁇ as a function of the measurements of the crankshaft angle ⁇ .
- the sampling pitch of the internal pressure of the cylinder P cy ⁇ is greater than or equal to 0.5 degrees of the angle of the crankshaft ⁇ . Then, for each cycle of the combustion, the calculation means 23 stores in memory the sampled values of the internal pressure of the cylinder P cy ⁇ . From these sampled values, the calculation means 23 calculates the combustion parameters Xi, described above, and transmits them, via connections 40, towards the estimation means 24.
- This estimation means 24 makes it possible to estimate an output parameter PSe of the engine, for example a level of nitrogen oxides NOx e , from said combustion parameters Xi calculated. In addition, it outputs the estimated result PSe by a connection 41.
- the estimation means 24 can use several models to estimate the output parameter of the engine.
- the models are able to estimate the engine output parameter from a weighted sum of said combustion parameters Xi.
- the estimation means 24 comprises a first model capable of calculating the output parameter PSe according to the following equation (1): PSe - Xi equation (1)
- N number of combustion parameters Xi calculated by the calculation means 23; - (X 1 : weighting constant which varies according to the combustion parameter Xi, and
- the estimation means 24 comprises a second model capable of calculating the output parameter PSe according to the following equation (2):
- the estimation means 24 comprises a third model capable of calculating the output parameter PSe according to the following equation (3):
- this estimation means 24 uses models whose weighting constants Ci 1 have been determined by prior tests.
- FIG. 2 schematically shows an embodiment of a regulating device 50 of an output parameter of an internal combustion engine 1.
- FIG. 1 also shows in this FIG. 2 certain elements described in FIG. .
- the regulating device 50 comprises a means 51 for developing a setpoint of the output parameter of the motor PS PS, a regulating means 52 and an estimation module 53. These means 51, 52 and this module 53 can be included in a form software or in the form of onboard logic circuits in the ECU 22.
- the estimation module 53 comprises the calculation means 23 and the estimation means 24 as described in FIG. 1, in addition, it estimates an output parameter PSe, which it then transmits via the connection 41 to a means of estimation. calculation 59 of the regulating means 52.
- the calculation means 59 also receives, via a connection 54, the setpoint of the output parameter of the motor PS PS produced by the means 51.
- This calculating means 59 calculates a difference d between said setpoint PS and said PSe estimate of the output parameter of the engine and transmits this difference d by a connection 55 towards a correction means 56 of the regulating means 52
- the correction means 56 may be an integral proportional type equalizer PI, or integral proportional derivative type PID, or any other type of corrector known to those skilled in the art.
- This correction means 56 generates a command Cmde from the difference d received, and transmits this command Cmde by a connection 57 to an actuator 58.
- the actuator 58 makes it possible to control the real value of the output parameter of the motor that it is desired to regulate.
- This actuator 58 may be any means for modifying the values of the engine output parameters, such as for example a fuel injector, an air flap mounted on the intake manifold 10, a recirculation valve for a part of the engines. exhaust gas.
- This regulating device 50 makes it possible to regulate the output parameter of the motor via the actuator 58 as a function of a comparison between the setpoint Cons PS and the estimate PSe of the output parameter of the motor.
- FIG. 3 diagrammatically shows another embodiment of a regulating device 50 of an output parameter of an internal combustion engine 1.
- FIG. 3 also shows certain elements described in the previous figures. 1 and 2.
- the regulating device
- 50 comprises a means 60 for developing a command setpoint Cons Cmde and a second calculating means 61.
- This second calculation means 61 receives, on the one hand, the command Cmde produced by the regulation means 5 and which is transmitted by the connection 57, and on the other hand the command setpoint Cons Cmde which is transmitted by a connection 62 from the means 60.
- the second calculation means 61 calculates a control difference DiffCmde between the command Cmde and the instruction of control Command Cmde and transmits the result via a connection 63 towards the actuator 58.
- the output parameter of the engine may be the rate of nitrogen oxides to be regulated
- the actuator 58 may be an air flap mounted on the intake manifold 10
- Cons Cmde and Cmde respectively represent a setpoint of air flow and a correction of this air flow, the control device 50 thus ensuring the reduction of dispersion of the nitrogen oxides emitted by the engine.
- the taking into account of the measurement of the internal pressure of the cylinder allows a better estimate of the engine output parameters in comparison with the use of a mapping of the output parameter according to the engine speed and the fuel injected into the chamber of combustion.
- Closed-loop control reduces engine dispersion and reduces engine manufacturing costs, including reducing the volume of pollutant aftertreatment 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0953080A FR2945320B1 (fr) | 2009-05-11 | 2009-05-11 | Estimation et regulation d'au moins un parametre de sortie d'un moteur a combustion interne. |
PCT/FR2010/050901 WO2010130937A1 (fr) | 2009-05-11 | 2010-05-10 | Estimation de la concentration en oxydes d ' azote d ' un moteur a combustion interne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2430298A1 true EP2430298A1 (fr) | 2012-03-21 |
EP2430298B1 EP2430298B1 (fr) | 2021-02-03 |
Family
ID=41343568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP10728732.8A Active EP2430298B1 (fr) | 2009-05-11 | 2010-05-10 | Estimation de la concentration en oxydes d'azote d'un moteur à combustion interne. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2430298B1 (fr) |
FR (1) | FR2945320B1 (fr) |
WO (1) | WO2010130937A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6156284B2 (ja) * | 2014-08-07 | 2017-07-05 | トヨタ自動車株式会社 | 内燃機関の燃焼制御装置 |
EP3176414A1 (fr) * | 2015-12-03 | 2017-06-07 | Robert Bosch Gmbh | Procédé pour faire fonctionner un moteur à combustion interne |
FR3044717B1 (fr) | 2015-12-04 | 2017-11-24 | Renault Sas | Procede d'estimation de masse enfermee dans la chambre de combustion d'un cylindre d'un moteur a combustion interne de vehicule automobile |
FR3074530A1 (fr) * | 2017-12-05 | 2019-06-07 | Continental Automotive France | Systeme et procede de determination d'une quantite corrigee d'oxydes d'azote |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4706134B2 (ja) | 2001-06-15 | 2011-06-22 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
US6425372B1 (en) * | 2001-08-30 | 2002-07-30 | Caterpillar Inc. | Method of controlling generation of nitrogen oxides in an internal combustion engine |
DE102006016484A1 (de) * | 2006-04-07 | 2007-10-11 | Daimlerchrysler Ag | Verfahren zum Betrieb einer Brennkraftmaschine |
JP4830912B2 (ja) * | 2007-03-05 | 2011-12-07 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
FR2915241B1 (fr) * | 2007-04-19 | 2009-06-05 | Renault Sas | Moteur a combustion interne avec regulation de la quantite de carburant injecte et procede d'elaboration d'une valeur de consigne de carburant injecte. |
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2009
- 2009-05-11 FR FR0953080A patent/FR2945320B1/fr active Active
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2010
- 2010-05-10 WO PCT/FR2010/050901 patent/WO2010130937A1/fr active Application Filing
- 2010-05-10 EP EP10728732.8A patent/EP2430298B1/fr active Active
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Also Published As
Publication number | Publication date |
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WO2010130937A1 (fr) | 2010-11-18 |
FR2945320B1 (fr) | 2017-11-17 |
FR2945320A1 (fr) | 2010-11-12 |
EP2430298B1 (fr) | 2021-02-03 |
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