EP2191119A2 - Procede d'estimation de la temperature d'un capteur de pression de gaz fixe sur une paroi d'un moteur diesel, et utilisation d'un tel procede - Google Patents
Procede d'estimation de la temperature d'un capteur de pression de gaz fixe sur une paroi d'un moteur diesel, et utilisation d'un tel procedeInfo
- Publication number
- EP2191119A2 EP2191119A2 EP08832106A EP08832106A EP2191119A2 EP 2191119 A2 EP2191119 A2 EP 2191119A2 EP 08832106 A EP08832106 A EP 08832106A EP 08832106 A EP08832106 A EP 08832106A EP 2191119 A2 EP2191119 A2 EP 2191119A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- temperature
- exhaust
- wall
- speed
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 4
- 238000005094 computer simulation Methods 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 239000003570 air Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 9
- 239000012080 ambient air Substances 0.000 description 4
- 238000002513 implantation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
-
- 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
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- 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
- F02D2200/0414—Air temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
- G01K2205/02—Application of thermometers in motors, e.g. of a vehicle for measuring inlet gas temperature
-
- 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
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a method for estimating the temperature of a gas pressure sensor attached to a wall of a diesel engine of a motor vehicle. It also relates to the use of such a method for determining the gas pressure before turbine of a diesel engine of a motor vehicle supercharged by a turbocharger.
- a turbocharger is composed of a turbine and a compressor, in order to increase the amount of air admitted into the engine.
- the turbine is placed at the outlet of the exhaust manifold and is driven by the exhaust gas.
- the power provided by the exhaust gas can be modulated by means of a discharge valve (turbocharger with fixed geometry, abbreviated “TGF”) or fins (turbo variable geometry, abbreviated “TGV”).
- TGF discharge valve with fixed geometry
- TSV turbine variable geometry
- the compressor is mounted on the same axis as the turbine. It compresses the air that enters the intake manifold.
- a heat exchanger can be placed between the compressor and the intake manifold to cool the air leaving the compressor.
- An actuator is used to control the opening and closing of the valve or fins.
- the control signal of the actuator is provided by a computer called ECU (Electronic Control Unit) and allows to slave the pressure in the intake manifold.
- the pressure setpoint in the manifold is calculated by the ECU.
- the pressure in the intake manifold is measured via a sensor placed on this manifold.
- Turbine Pressure Information (abbreviated as "Pavt") is of great importance for the control of variable geometry turbine diesel engines.
- the torque structure is the calculation of the actual torque of the motor (torque produced less the torques consumed by the different devices such as alternator, air conditioner compressor, etc.) which ensures smooth running of the engine; the guarantee of the reliability of components of the engine subjected to the stress of the upstream turbine pressure (exhaust valves, actuator of the turbo ). It is essential for the control of the engine to be able to ensure the proper functioning of a pressure sensor before turbine and to precisely determine the correct operating ranges of the latter.
- the exhaust gases are composed, inter alia, of water in gaseous form.
- the walls of the exhaust line cool down.
- the water contained in the exhaust gas condenses at the walls.
- Water can condense at the Pavt sensor. Under certain operating conditions (ambient air temperature, vehicle speed, etc.), this liquid water may freeze at the sensor. The pressure indicated by the sensor is then wrong.
- An additional method is to prevent the maximum freezing of the Pavt sensor by positioning it in thermally stable undercap locations (ie with small or perfectly controlled temperature variations).
- a competing car manufacturer proposes an implantation of the sensor on the cooling circuit of the EGR circuit (thus with a thermal close to the water temperature of the cooling circuit, fully controlled and regulated).
- This method has the advantage of being thermally stable, but it has the disadvantage that there is no degree of freedom in the implantation of the sensor.
- the present invention aims at overcoming the disadvantages of the aforementioned techniques by directly proposing a technique for estimating the temperature of the Pavt sensor, so as to allow the use of this sensor even when the ambient temperature is negative and his is greater than 0 0 C.
- the present invention therefore relates to a method for estimating the temperature of a gas pressure sensor fixed on a wall of a diesel engine of a motor vehicle supercharged by a turbocharger, this sensor being positioned upstream of the turbine of said turbocharger.
- T water temperature of the engine cooling water:
- variable Tpechappement is determined using a sensor.
- variable Tpechappement is determined from a computer model.
- the invention also relates to the use of the method as defined above for the determination of the gas pressure before turbine of an engine diesel engine of a motor vehicle supercharged by a turbocharger, characterized in that it inhibits the pressure information delivered by said sensor when its estimated temperature is equal to or less than 0 0 C.
- FIG. 1 illustrates, as a function of time, the temperature of a Pavt sensor, based on a real measurement and two estimates.
- the main objective of the present invention is to be able to provide useful information on the temperature of the Pavt sensor.
- the principle is to analyze the thermal phenomena that affect the pressure sensor before turbine and to propose a model of evolution of its temperature.
- the Pavt sensor is in equilibrium between:
- This source is generally a source coming from the exhaust line (because of the nature of the sensor which measures the pressure before the turbine).
- Thermal exchange modeling is based on thermal equations that are analogous to electricity.
- Convective exchanges between the external air and the sensor hS Convective exchanges are described macroscopically by an exchange coefficient h. This coefficient is obtained by using an empirical relation connecting three dimensionless coefficients: the Nusselt number (Nu), the Reynolds number (Re) and the Prandtl number (Pr).
- the Reynolds number is a function of the flow of fresh air entering the engine compartment, which is directly related to the vehicle speed
- Ci and n constants to be identified on each type of vehicle by tests.
- This term represents the inertia of the sensor.
- This sensor is the mass heat of the sensor which is a constant for a given sensor.
- M is the mass of the sensor.
- the DT term ⁇ nm, m ⁇ , ⁇ requires knowledge of the temperature of the exhaust Tpecha PP ement. It can be envisaged to measure this temperature with a sensor or to estimate it by a model. The creation of an additional model is conceivable but this complicates the initial model of temperature of the sensor of Pavt. However, it is preferable that this model remains simple to be integrated in the software of an engine.
- Pavt is to diagnose the gel.
- the estimator indicates a temperature higher than 0 0 C, it is certain that the sensor will not be frozen.
- K1, K2, K3 and n constants to be identified on the vehicle.
- Curve A corresponds to a direct measurement of the temperature of said sensor.
- Curve B is an estimation curve established in accordance with the present method, taking into account the power radiated by the exhaust (equation 2).
- the curve C is an estimation curve established according to the present method, without taking into account the power radiated by the exhaust (equation 3).
- Pavt sensor and associated strategies may be extended to negative ambient temperatures as long as the sensor temperature is above 0 0 C.
- the sensor temperature information is additional information on the quality of Pavt's information.
- the present process can be applied to all thermally inert components (i.e., which do not release energy). It suffices to then adapt the previously proposed equations through the coefficients (K1, K2, K3 and n) as a function of the positioning of the component in question.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Supercharger (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0706575A FR2921155B1 (fr) | 2007-09-19 | 2007-09-19 | Procede d'estimation de la temperature d'un capteur de pression de gaz fixe sur une paroi d'un moteur diesel,et utilisation d'un tel procede. |
| PCT/FR2008/051409 WO2009037408A2 (fr) | 2007-09-19 | 2008-07-25 | Procede d'estimation de la temperature d'un capteur de pression de gaz fixe sur une paroi d'un moteur diesel, et utilisation d'un tel procede |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2191119A2 true EP2191119A2 (fr) | 2010-06-02 |
Family
ID=39365503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08832106A Withdrawn EP2191119A2 (fr) | 2007-09-19 | 2008-07-25 | Procede d'estimation de la temperature d'un capteur de pression de gaz fixe sur une paroi d'un moteur diesel, et utilisation d'un tel procede |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8490601B2 (fr) |
| EP (1) | EP2191119A2 (fr) |
| JP (1) | JP2010539389A (fr) |
| KR (1) | KR20100072255A (fr) |
| FR (1) | FR2921155B1 (fr) |
| WO (1) | WO2009037408A2 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2958609B1 (fr) * | 2010-04-08 | 2012-03-30 | Renault Sa | Procede d'estimation de la temperature initiale d'un organe mecanique d'un vehicule au demarrage du vehicule. |
| US8577514B2 (en) * | 2012-01-09 | 2013-11-05 | Ford Global Technologies, Llc | Ambient temperature estimation |
| JP7243648B2 (ja) * | 2020-01-24 | 2023-03-22 | トヨタ自動車株式会社 | 内燃機関制御システム |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2881075B2 (ja) * | 1992-08-05 | 1999-04-12 | 三菱電機株式会社 | 排気還流制御装置の故障診断方法 |
| JP3425652B2 (ja) * | 1995-04-20 | 2003-07-14 | 三菱電機株式会社 | 圧力センサを使用した自己診断装置 |
| JP3741290B2 (ja) * | 1996-03-29 | 2006-02-01 | スズキ株式会社 | 圧力センサの故障診断制御装置 |
| JPH10141150A (ja) | 1996-11-13 | 1998-05-26 | Nissan Motor Co Ltd | エンジンの排気還流制御装置の故障診断装置 |
| JPH10159661A (ja) * | 1996-11-28 | 1998-06-16 | Mazda Motor Corp | 通路の連通遮断異常検出装置 |
| US6658345B2 (en) * | 2001-05-18 | 2003-12-02 | Cummins, Inc. | Temperature compensation system for minimizing sensor offset variations |
| US6751567B2 (en) * | 2001-11-26 | 2004-06-15 | Ford Global Technologies, Llc | Electronic throttle plate index position determination for improved airflow correlation over various temperature conditions |
| US6681171B2 (en) * | 2001-12-18 | 2004-01-20 | Detroit Diesel Corporation | Condensation control for internal combustion engines using EGR |
| JP4120524B2 (ja) * | 2003-08-04 | 2008-07-16 | 日産自動車株式会社 | エンジンの制御装置 |
| EP1617056B1 (fr) * | 2004-07-14 | 2014-10-22 | Honda Motor Co., Ltd. | Système de commande de moteur à combustion |
| JP2006316707A (ja) * | 2005-05-13 | 2006-11-24 | Hitachi Ltd | Egr制御装置 |
| FR2897898B1 (fr) * | 2006-02-28 | 2008-04-18 | Renault Sas | Procede et dispositif de controle de la suralimentation en air d'un moteur a combustion interne |
| US7562649B2 (en) * | 2007-07-05 | 2009-07-21 | Southwest Research Institute | Combustion control system based on in-cylinder condition |
| DE102008043975B4 (de) * | 2008-11-21 | 2021-10-14 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Bereitstellen einer Luftmassenstromangabe bei einem aufgeladenen Verbrennungsmotor |
| FR2939508B1 (fr) * | 2008-12-09 | 2011-01-07 | Snecma | Procede et systeme de correction d'un signal de mesure d'une temperature. |
| JP4924694B2 (ja) * | 2009-11-02 | 2012-04-25 | 株式会社デンソー | エンジン制御装置 |
| JP2011163251A (ja) * | 2010-02-12 | 2011-08-25 | Mitsubishi Heavy Ind Ltd | ディーゼルエンジンの燃料噴射制御装置および方法 |
| US8627660B2 (en) * | 2010-12-02 | 2014-01-14 | Toyota Jidosha Kabushiki Kaisha | Control device for internal combustion engine with supercharger |
| US8919097B2 (en) * | 2011-05-12 | 2014-12-30 | Ford Global Technologies, Llc | Methods and systems for variable displacement engine control |
-
2007
- 2007-09-19 FR FR0706575A patent/FR2921155B1/fr active Active
-
2008
- 2008-07-25 EP EP08832106A patent/EP2191119A2/fr not_active Withdrawn
- 2008-07-25 JP JP2010525392A patent/JP2010539389A/ja active Pending
- 2008-07-25 US US12/678,859 patent/US8490601B2/en not_active Expired - Fee Related
- 2008-07-25 KR KR1020107008206A patent/KR20100072255A/ko not_active Withdrawn
- 2008-07-25 WO PCT/FR2008/051409 patent/WO2009037408A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009037408A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100222987A1 (en) | 2010-09-02 |
| FR2921155A1 (fr) | 2009-03-20 |
| WO2009037408A2 (fr) | 2009-03-26 |
| US8490601B2 (en) | 2013-07-23 |
| FR2921155B1 (fr) | 2009-10-23 |
| JP2010539389A (ja) | 2010-12-16 |
| WO2009037408A3 (fr) | 2009-05-22 |
| KR20100072255A (ko) | 2010-06-30 |
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| RIC1 | Information provided on ipc code assigned before grant |
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