EP3411581A1 - Procede de recalage d'un capteur de pression dans une ligne d'admission d'air d'un moteur avec compensation fonction de la temperature - Google Patents
Procede de recalage d'un capteur de pression dans une ligne d'admission d'air d'un moteur avec compensation fonction de la temperatureInfo
- Publication number
- EP3411581A1 EP3411581A1 EP17706565.3A EP17706565A EP3411581A1 EP 3411581 A1 EP3411581 A1 EP 3411581A1 EP 17706565 A EP17706565 A EP 17706565A EP 3411581 A1 EP3411581 A1 EP 3411581A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- sensor
- pressure sensor
- compensation
- engine
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2474—Characteristics of sensors
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
Definitions
- the invention relates to a method of resetting of at least one pressure sensor positioned in an air intake line of an internal combustion engine with a compensation adjustment adjusted as a function of temperature.
- the invention lies in the technical field of the control system of an internal combustion engine which is preferably controlled ignition.
- a pressure sensor has a measurement accuracy which depends on its temperature. Generally, the accuracy is optimal in the temperature range 0 ° C-90 ° C with a reduced error range. The error range becomes much greater when the sensor is very cold, for temperatures below 0 ° C, or very hot for temperatures above 90 ° C.
- a sensor can be reset engine stopped at an initial temperature, preferably between 0 and 90 ° C by a resetting compensation being the difference between a measurement of said at least one pressure sensor and the corresponding atmospheric pressure then a reference pressure actually prevailing in the intake line at this initial temperature.
- Recalibration of pressure sensors consists in compensating for this offset, in order to equalize the measurement values of the sensors on the same measured pressure. This operation is particularly necessary for the proper operation of driving a spark ignition engine.
- the resetting compensation is then retained and applied for the entire operating period of the engine for the pressure sensor concerned.
- the registration applied by compensation nevertheless raises the following problems.
- the first problem is that there is no consideration of the temperature of the pressure sensors for compensation, which can lead to a significant degradation of the accuracy of the sensor concerned. Indeed, the accuracy of the sensors is a function of the temperature while the compensation applied is constant.
- the offset compensation applied is no longer adapted to the actual conditions. This phenomenon is all the more marked as the temperature difference between the resetting and the operation is important. This is for example the case, without this being limiting, for a resetting performed initially at very low temperature during a subsequent heating due to the operation of the engine.
- FIG. 1 illustrates the evolution of the error range of a pressure sensor as a function of the temperature indicated on the abscissa with the ordinate of the error multiplier values.
- the error of a pressure sensor can be expressed in the form e ref . mult (T), with e ref being a reference error of the sensor and mult (T) an error multiplier.
- the error multiplier is dependent on the temperature and its variation as a function of the temperature is given by the sensor manufacturer according to a defined curve.
- FIG. 2 illustrates the evolution of the error ranges as a function of the temperature respectively for two specific pressure sensors, namely an atmospheric pressure sensor and a supercharging sensor. The temperature is indicated on the abscissa with ordinate error multiplier values.
- a template comprising two curves delimits the range of errors for a succession of temperatures.
- the two dashed curves are associated with the Capsural Boost Sensor while the two full lines are associated with the Capatm Atmospheric Pressure Sensor.
- the curves for each sensor are different with a higher margin of error for the Capsural Boost sensor values than for the Capatm air pressure sensor.
- an atmospheric pressure sensor Cap atm is accurate to +/- 15mb in the 0-85 ° C zone, while a Capsural supercharging pressure sensor is accurate to +/- 25mb in the same area . It is the same for an intake pressure sensor as for a Capsural boost pressure sensor, without the template of this intake pressure sensor being shown in Figure 2.
- a maximum resetting compensation C rma x (T1) and C rma x (T) respectively for a temperature T1 or T can be defined between the points furthest apart from each other one of the curves of the Capatm atmospheric pressure sensor with one of the curves of the Capsural supercharging sensor, between the highest curve of the Capsural supercharging sensor and the lowest curve of the Capatm atmospheric sensor.
- FIG. 2 shows that by keeping the same compensation compensation for all temperatures, the accuracy of the pressure measurement is degraded by a specific sensor, which can lead to unacceptable situations such as non-starting or loss of performance of the internal combustion engine, for example by the biased determination of a torque of the target engine.
- the problem underlying the invention is for an air intake line in an internal combustion engine comprising at least one sensor pressure, to reset the pressure sensor measurements by adding a compensation compensation which is updated according to the operating conditions of the engine involving a temperature change in the vicinity of the sensor or sensors.
- a method of resetting of at least one pressure sensor positioned in an air intake line of an internal combustion engine for which said at least a pressure sensor is recalibrated with the engine stopped at an initial temperature by an initial adjustment compensation being the difference between a measurement of the at least one pressure sensor and the atmospheric pressure corresponding to a reference pressure actually prevailing in the line of admission to this initial temperature according to the following equation:
- C r (T1) being the initial registration compensation at the initial temperature and engine stopped
- Pca P (T1) being the pressure measurement by said at least one pressure sensor
- P ref (T1) the reference pressure which is the atmospheric pressure and T1 the initial temperature
- the measurement of said at least one pressure sensor being recaled by the initial calibration compensation thus calculated, characterized in that in operation of the engine, at a given temperature, the reset compensation is adjusted to from this initial readjustment compensation as a function of the temperature of said at least one pressure sensor by a multiplicative correction factor.
- the technical effect is to obtain measurements of at least one pressure sensor present in the air intake line of an internal combustion engine which are always corrected as a function of temperature.
- the error characteristics of the sensor or sensors being known is calculated a multiplicative factor depending on the temperature of the sensor that corrects the correction compensation determined before startup and so-called initial, to adapt the registration regardless of the sensor temperature, since during operation, the temperature in the vicinity of the sensors varies, therefore the accuracy of the sensors as the compensation compensation previously calculated for an initial temperature.
- the main advantage is an improvement in the accuracy of the pressure measurements. Taking into account the effects of temperature on the sensors makes it possible to reduce the error of the measurement of the sensors.
- the sensors of the engine air intake line are readjusted regardless of the temperature.
- the implementation is purely software, does not require the addition of new components in the air intake line and therefore does not induce additional cost.
- an initial recalibration compensation is performed for at least a second pressure sensor with respect to a first pressure sensor between their respective pressure measurements at an initial temperature with, in operation of the engine and at a given temperature, adjusting a resetting compensation from this initial registration compensation as a function of temperature, said at least one second sensor and the first sensor being positioned in the intake line, a respective error mask according to the sensor temperature being developed for each sensor, each error template defining a specific error range at successive temperatures, the resetting compensations being made between pressure measurements of the first and of the at least one second sensor at successive temperatures .
- the resetting compensation for a given temperature T is obtained according to the following equation:
- C r (T) being the resetting compensation between the two sensors at a given instant for a given temperature T
- C r (T1) the initial registration compensation at the initial temperature T1 with the engine stopped
- k (T) the corrective factor multiplicative for the given temperature T, this factor being calculated as a function of the maximum resetting compensations between the respective error ranges of the first sensor and of said at least one second sensor for the given temperature and for the initial temperature according to the following equation:
- k (T) being the multiplicative correction factor for the given temperature T
- C rma x (T) and Crmax (T1) the maximum compensation compensation between the respective error ranges of the first sensor and of said at least one second sensor respectively for the temperature given and for the initial temperature T1 with motor stopped.
- each template consists of two curves delimiting a margin of error, the margin of error remaining constant in a temperature range of 0 to 85 ° C and increasing for temperature hois of this range plus these temperatures. 'away from 0 ° C or 85 ° C.
- the invention also relates to a power train comprising an internal combustion engine with an air intake line to the engine, the line comprising at least one pressure sensor, characterized in that said at least one pressure sensor. is recaled according to a registration method as previously.
- the invention also relates to a power train comprising an internal combustion engine with an air intake line to the engine, the line comprising a first and at least a second pressure sensor, characterized in that said at least one a second pressure sensor is recalibrated in operation of the motor relative to the first pressure sensor in accordance with a resetting process as previously described.
- the first sensor and said at least one second sensor are selected from an atmospheric pressure sensor, a supercharging sensor positioned downstream of a supercharged internal combustion engine turbocharger compressor and a pressure sensor. intake positioned in an intake manifold.
- the first sensor is the atmospheric pressure sensor.
- the engine is spark ignition.
- FIG. 1 is a schematic representation of a curve giving the error multiplier of a pressure sensor as a function of temperature, a median temperature range giving a constant error multiplier whereas outside this range the the error multiplier diverges, the pressure sensor being according to the state of the art but which can be corrected according to a registration method according to the present invention,
- FIG. 2 is a diagrammatic representation of two error templates for an atmospheric pressure sensor and a supercharging sensor, respectively, the adjustment compensation being adjusted according to the temperature in accordance with a registration method according to the present invention
- FIG. 3 is a schematic representation of a timing diagram of the registration method according to the present invention
- FIG. 4 is a schematic representation of a logic diagram showing the steps of the resetting method according to the present invention.
- the present invention relates to a method of resetting of at least one pressure sensor positioned in an air intake line of an internal combustion engine.
- the present invention can be applied to a power train comprising an internal combustion engine with an air intake line to the engine, the line comprising at least one pressure sensor.
- the engine may preferably be spark ignition.
- the pressure sensor can be recaled according to the registration method which will be described.
- one of the pressure sensors serves as a reference sensor and the other sensor or sensors are reset in operation of the engine relative to the sensor reference pressure according to a registration method which will be described.
- the reference pressure sensor and the remaining pressure sensor or sensors may be selected from an atmospheric pressure sensor, a supercharging sensor positioned downstream of an internal combustion engine turbocharger compressor. supercharged and an intake pressure sensor positioned in an intake air distributor.
- the reference pressure sensor can be the atmospheric pressure sensor, this sensor being the most accurate.
- Figure 3 shows a timing diagram of the implementation of the registration method according to the present invention.
- the offset compensation is calculated upon awakening of a Real computer embedded in the motor vehicle for which it is desired recalibrate at least one pressure sensor positioned in an air intake line of an internal combustion engine fitted to the vehicle.
- the alarm clock Real calculator can be done as soon as the driver has put the ignition but without starting the engine.
- a hold time of the engine stopped MA begins with the awakening of the Real computer and ends with the start of the engine D.
- an initial registration compensation referenced hereinafter C r (T1) with reference to FIG 2 serving as a basis for a future registration of a pressure sensor present in the air intake line of the engine.
- the initial calibration compensation C r (T1) is the difference between a measurement of the pressure sensor and the atmospheric pressure.
- the atmospheric pressure then corresponds to a reference pressure actually prevailing in the intake line at this initial temperature T1, the engine being stopped.
- This initial engine temperature has a high probability of being around the ambient temperature, unless the vehicle has just stopped and is ready to restart, in which case the engine is still hot.
- the initial temperature is likely to be in the optimal measurement range of the pressure sensor, for example between 0 ° C and 50 ° C unless the outside temperature is very cold.
- the temperature T1 has been indicated as being less than 0 ° C to be well spaced from the temperature T in operation of the engine which is greater than 0 ° C. This is by no means limiting and it should be borne in mind that the initial temperature T1 is in the most frequent cases higher than 0 ° C, cbnc in the optimal operating range of most pressure sensors.
- C r (T1) being the initial registration compensation at the initial temperature T1 and stopped engine
- P cap (T1) being the pressure measurement by said at least one pressure sensor
- Pref (T1) the reference pressure which is the atmospheric pressure, these measurements being taken at the initial temperature T1.
- the measurement of the pressure sensor and the subsequent measurements of the sensor are adjusted by the resetting compensation C r (T1) thus calculated which is adjusted successively as a function of the prevailing temperatures in the engine.
- the resetting process thus comprises a step of adjusting the initial recalibration compensation C r (T1) in operation of the motor as a function of the pressure sensor temperature by a multiplicative correction factor.
- this is preferably done between two or more pressure sensors including a reference sensor, the pressure sensors being positioned in the air intake line of the engine.
- an initial registration compensation is performed for at least a second pressure sensor with respect to a first pressure sensor between their respective pressure measurements at an initial temperature. Then, during operation of the engine and at a given temperature T, an adjustment of a resetting compensation C r (T) is performed from this initial resetting compensation C r (T1) as a function of the temperature T prevailing at this measurement.
- a respective error template or an equivalent model depending on the sensor temperature is developed for each sensor, each error template defining a specific error range at successive temperatures.
- the resetting compensations C r (T1) or C r (T) are performed between pressure measurements of the first and second sensors or other temperatures for successive temperatures. This is done motor turning MT. Indeed, the initial calibration compensation C r (T1) was first calculated at awakening of the calculator RCal engine stopped at temperature T1. During operation of the engine, in particular the moving vehicle, the temperature varies and therefore the accuracy of the sensor (s) and the compensation compensation C r (T1) or C r (T) also vary.
- the resetting compensation or C r (T) at a given temperature T is obtained according to the following equation:
- C r (T) being the resetting compensation between the two sensors at a given instant for a given temperature T
- C r (T1) the initial calibration compensation at the temperature initial T1 engine stopped
- k (T) the multiplicative correction factor for the given temperature T.
- the factor k (T) is calculated as a function of the maximum resetting compensation Crmax (T1) or C rmax (T) between the respective error ranges of the first sensor and of said at least one second sensor for the given temperature. (T) and for the initial temperature (T1) according to the following equation:
- Each template may consist of two curves defining a margin of error, the margin of error remaining constant in a temperature range of 0 to 85 ° C and increasing for temperatures outside this range plus these temperatures s'. away from 0 ° C or 85 ° C.
- FIG. 4 illustrates the different steps of the registration method according to the present invention.
- MY reference the engine stopped
- Pcap the measurement of a pressure sensor
- Pref the measurement of reference pressure, including atmospheric pressure, at an initial temperature T1 which is the reference temperature.
- the first calculation module 1 sends the resetting compensation C r which corresponds to the temperature reset compensation T1 to a correction module 5 calculating a correction compensation corrected Crcorrig.
- the first calculation module 1 sends the value of the temperature T1 to a second module for calculating the maximum resetting compensation C rmax (T1) for the initial temperature T1, this second module being referenced 2.
- a third module calculates the maximum resetting compensation C rmax (T) for a temperature T according to the temperature measurement sent to its input, this third module being referenced 3. This is done in operation of the engine, so with a rotating motor MT.
- the calculations of the third module 3 are made continuously on a succession of temperatures at the sensors.
- the initial maximum resetting compensation C rmax (T1) for the initial temperature T1 can be calculated by the second module 2 via a temperature indexed table. This table is calculated from the sensor error templates.
- the maximum resetting compensation C rma x (T) can be calculated for the temperature then in force T by means of a table indexed in temperature. This table is the same as that used to calculate the initial maximum registration compensation C rma x (T1) at the initial temperature T1.
- the second module 2 and the third module 3 send the respective calculated maximum resetting compensations C rma x (T1) and C rmax (T) to a fourth module 4 for calculating the coefficient k.
- the fourth calculation module 4 transmits to the correction module 5 forming the fifth module calculating the correction compensation corrected Crcorrig.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1650880A FR3047516B1 (fr) | 2016-02-04 | 2016-02-04 | Procede de recalage d’un capteur de pression dans une ligne d’admission d’air d’un moteur avec compensation fonction de la temperature |
| PCT/FR2017/050153 WO2017134366A1 (fr) | 2016-02-04 | 2017-01-25 | Procede de recalage d'un capteur de pression dans une ligne d'admission d'air d'un moteur avec compensation fonction de la temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3411581A1 true EP3411581A1 (fr) | 2018-12-12 |
| EP3411581B1 EP3411581B1 (fr) | 2020-03-25 |
Family
ID=55451490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17706565.3A Active EP3411581B1 (fr) | 2016-02-04 | 2017-01-25 | Procede de recalage d'un capteur de pression dans une ligne d'admission d'air d'un moteur avec compensation fonction de la temperature |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3411581B1 (fr) |
| CN (1) | CN108699991B (fr) |
| FR (1) | FR3047516B1 (fr) |
| WO (1) | WO2017134366A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878230B (zh) * | 2020-07-06 | 2022-02-08 | 东风汽车集团有限公司 | 一种发动机缸内混合气温度预估方法 |
| CN112986365B (zh) * | 2021-02-19 | 2023-10-13 | 三诺生物传感股份有限公司 | 一种电化学测量校正方法及系统 |
| CN118318752B (zh) * | 2024-04-17 | 2025-12-09 | 北京市农林科学院信息技术研究中心 | 牛咀嚼次数监测方法、装置、设备及介质 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10047811A1 (de) * | 2000-09-27 | 2002-04-18 | Volkswagen Ag | Verfahren und Vorrichtung zur Regelung einer Verbrennungskraftmaschine |
| DE10261382B4 (de) * | 2002-12-30 | 2012-09-13 | Robert Bosch Gmbh | Verfahren zur Adaption der Kennlinie eines Saugrohrdrucksensors einer Brennkraftmaschine |
| DE102004001118B4 (de) * | 2004-01-07 | 2018-08-23 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
| DE102005049870B4 (de) * | 2005-10-18 | 2008-03-27 | Siemens Ag | Verfahren und Vorrichtung zur Erkennung eines fehlerhaften Anschlusses eines Differenzdrucksensors |
| FR2933137B1 (fr) * | 2008-06-30 | 2010-08-20 | Renault Sas | Systeme et procede de correction de la mesure d'un capteur de pression avant turbine |
| ITPR20120054A1 (it) * | 2012-08-10 | 2014-02-11 | A E B S P A | Procedimento e dispositivo emulazione sensore di pressione in veicoli dotati di iniettori di carburante e alimentabili con più di un carburante |
| JP5462390B1 (ja) * | 2013-04-23 | 2014-04-02 | 三菱電機株式会社 | 内燃機関の制御装置 |
| KR101534712B1 (ko) * | 2013-12-17 | 2015-07-08 | 현대자동차 주식회사 | 연소압 신호에 의한 부스트 압력 센서 및 공기 유량 센서의 진단 및 보정 방법 및 시스템 |
-
2016
- 2016-02-04 FR FR1650880A patent/FR3047516B1/fr not_active Expired - Fee Related
-
2017
- 2017-01-25 EP EP17706565.3A patent/EP3411581B1/fr active Active
- 2017-01-25 CN CN201780009408.7A patent/CN108699991B/zh active Active
- 2017-01-25 WO PCT/FR2017/050153 patent/WO2017134366A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN108699991B (zh) | 2021-06-18 |
| FR3047516B1 (fr) | 2018-03-23 |
| WO2017134366A1 (fr) | 2017-08-10 |
| EP3411581B1 (fr) | 2020-03-25 |
| FR3047516A1 (fr) | 2017-08-11 |
| CN108699991A (zh) | 2018-10-23 |
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