CN111094709A - Method for controlling a heat engine - Google Patents

Method for controlling a heat engine Download PDF

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Publication number
CN111094709A
CN111094709A CN201880059851.XA CN201880059851A CN111094709A CN 111094709 A CN111094709 A CN 111094709A CN 201880059851 A CN201880059851 A CN 201880059851A CN 111094709 A CN111094709 A CN 111094709A
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CN
China
Prior art keywords
particulate filter
engine
heat engine
amount
measurement
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.)
Pending
Application number
CN201880059851.XA
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Chinese (zh)
Inventor
斯蒂芬妮·奥杜安-沃尔什
帕斯卡·克莱默德
迪米特里奥·卡拉格奥吉奥
让·克利斯托夫·吉班
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PSA Automobiles SA
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PSA Automobiles SA
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Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of CN111094709A publication Critical patent/CN111094709A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/007—Electric control of rotation speed controlling fuel supply
    • F02D31/009—Electric control of rotation speed controlling fuel supply for maximum speed control
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • 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
    • F02D41/1446—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 exhaust temperatures
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
    • F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0418—Methods of control or diagnosing using integration or an accumulated value within an elapsed period
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/10—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle or its components
    • F01N2900/102—Travelling distance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1402—Exhaust gas composition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1404—Exhaust gas temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1606—Particle filter loading or soot amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0237—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles for regenerating ex situ
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D2041/0265—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to decrease temperature of the exhaust gas treating apparatus
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0812—Particle filter loading
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • 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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The invention mainly relates to a method for controlling a thermal engine (10), in particular of a motor vehicle, characterized in that it comprises: a step of performing such measurement in the case where the running condition of the motor vehicle satisfies the measurement of the accumulated particulate amount in the particulate filter (16); a step of generating information called key client information in the case where the running condition of the motor vehicle does not satisfy the measurement of the accumulated particulate amount in the particulate filter (16); and, when the accumulated amount of particles exceeds a threshold value, and/or when information, called critical client information, is generated within a travel distance exceeding the threshold value or a time period exceeding the threshold value, the method comprises a step for activating at least one reconfiguration mode of the thermal engine (10) for preventing any regeneration of the particulate filter (16) and informing the driver of the vehicle of an operating failure of the thermal engine.

Description

Method for controlling a heat engine
Technical Field
The invention relates to a method for controlling a heat engine. The invention belongs to the field of exhaust decontamination of heat engines.
Background
When a mixture of air and fuel is combusted in a heat engine, pollutants are discharged into the exhaust line of the engine. These pollutants are mainly unburned Hydrocarbons (HC), nitrogen oxides (NO and NO)2) Carbon oxides (including carbon monoxide CO), and a large number of numerous particles.
Environmental regulations on exhaust decontamination require the installation of exhaust aftertreatment systems in the exhaust line of an engine. The exhaust line of an engine is therefore usually equipped with at least a catalyst, for example a three-way catalyst, which allows the reduction of nitrogen oxides to nitrogen and carbon dioxide, the oxidation of carbon monoxide to carbon dioxide, and the oxidation of unburned hydrocarbons to carbon dioxide and water.
Some solid or liquid particles, mainly consisting of carbon-based soot and/or oil droplets, are also discharged. The size of these particles is typically between a few nanometers and a micron. In order to capture them, as described in document EP2426326, a particulate filter composed of a ceramic-type mineral matrix of honeycomb structure is generally provided, which defines channels which are arranged substantially parallel to the general flow direction of the exhaust gas in the filter and are alternately closed on the gas inlet face side of the filter and on the gas outlet face side of the filter.
The particulate filter needs to be regenerated periodically to avoid overloading. These regenerations occur in the presence of heat and oxygen. For gasoline engines, a larger engine operating area allows the necessary heat to be provided. Oxygen may be provided by interrupting the injection when the accelerator is released or when a gear shift is made. For regeneration, the exhaust gas temperature at the inlet of the particulate filter is at least 550 ℃, and the oxygen fraction at the inlet of the particulate filter is at least 2%.
However, during driving, there may be situations where the conditions are not met for a period of time (regeneration time is too short, heat is too low, or oxygen in the exhaust is insufficient). If these conditions persist or occur continuously over a longer period of time, the particulate filter may store a large amount of particulates that may damage the engine in the event of regeneration.
Disclosure of Invention
The present invention aims to effectively remedy this drawback by proposing a method for controlling a heat engine, in particular of a motor vehicle, connected to an exhaust line comprising a particulate filter, the control method being characterized in that it comprises:
a step of performing such measurement in a case where a running condition of the motor vehicle satisfies a measurement of an accumulated particulate amount in the particulate filter;
a step of generating information called key client information in a case where the running condition of the motor vehicle does not satisfy the measurement of the accumulated particulate amount in the particulate filter;
and when the cumulative amount of particles exceeds a threshold value, and/or when information called critical client information is generated for a distance traveled that exceeds the threshold value or a period of time that exceeds the threshold value,
the method comprises a step for activating at least one reconfiguration mode of the heat engine, which is used to prevent any regeneration of the particulate filter.
Thus, the present invention prevents safety risks by preventing regeneration of the particulate filter when the accumulated particulate amount exceeds a critical threshold, or cannot be determined over an excessive distance or period of time.
According to an embodiment, the reconfiguration mode of the heat engine comprises:
inhibiting interruption of injection, or
Limiting the performance of the heat engine, or
A rich air/fuel mixture is used.
According to an embodiment, the injection interruption is inhibited so as to inhibit any unsafe injection interruption, so as to avoid an excess of oxygen in the exhaust gas, which allows to initiate the regeneration of the particulate filter, that is to say, so as to avoid the oxygen ratio at the inlet of the particulate filter reaching a threshold value of about 2%. "about 2%" means 10% variation around this value.
According to an embodiment, when the accelerator is released, fuel injection is continued to minimize the amount of oxygen that can enter the particulate filter and to reduce the exhaust gas temperature at the inlet of the particulate filter.
According to an embodiment, the limitation of the performance of the heat engine is implemented to limit the load of the heat engine as a function of the speed of rotation. This allows limiting the operating range in which the exhaust gas temperature may be too high and natural regeneration may be initiated, especially when the exhaust gas temperature exceeds a value of about 550 ℃.
According to an embodiment, the calibration of the maximum load authorized according to the rotation speed is performed according to the gas temperature upstream of the particulate filter, so as to limit the exhaust gas temperature upstream of the particulate filter to a threshold temperature of, for example, approximately 450 ℃.
According to an embodiment, the use of a high abundance air/fuel mixture is to apply an air/fuel mixture abundance of greater than 1 to limit the amount of oxygen entering the particulate filter.
According to an embodiment, the measurement of the accumulated amount of particles is performed based on a measurement of a pressure change between an inlet and an outlet of the particulate filter.
The invention also relates to an engine computer comprising a memory storing software instructions for implementing the control method of a heat engine as described above.
The invention also relates to a thermal engine comprising an engine computer as defined above.
Drawings
The invention will be better understood from a reading of the following description and a review of the accompanying drawings. The drawings are given by way of illustration of the invention only and not by way of limitation, and in which:
figure 1 is a schematic view of a heat engine for implementing the control method according to the invention;
figure 2 is a diagram of the steps of a method for controlling a heat engine according to the present invention;
fig. 3 is a graph illustrating the principle of limiting the engine torque according to the engine speed and the exhaust gas temperature upstream of the particulate filter according to the invention.
Detailed Description
Fig. 1 shows a thermal engine 10, for example a gasoline engine, particularly intended to be equipped to a motor vehicle.
The heat engine 10 is connected to an exhaust line 12 to exhaust combustion gases produced by the operation of the heat engine 10.
The exhaust line 12 comprises an element 14 for decontaminating gaseous pollutants, which element 14 is, for example, an oxidation catalyst or a three-way catalyst. The three-way catalyst 14 allows, among other things, the reduction of nitrogen oxides to nitrogen and carbon dioxide, the oxidation of carbon monoxide to carbon dioxide, and the oxidation of unburned hydrocarbons to carbon dioxide and water.
The exhaust line 12 comprises a particle filter 16 for filtering soot particles in the exhaust gases of the hot engine 10. The particulate filter 16 is adapted to filter soot from the combustion of gasoline (hence the english language corresponds to the "gasoline particulate filter" abbreviated GPF), which particulate filter 16 is different from conventional particulate filters used to ensure the filtration of soot generated by the combustion of diesel fuel.
In the particulate filter 16, the exhaust gas passes through the material constituting the particulate filter 16. Thus, when the particulate filter 16 is formed of channels, each of these channels includes one end that is plugged so that exhaust gas flowing in the particulate filter 16 flows from one channel to another channel to exit the particulate filter 16 by passing through the walls of the different channels of the particulate filter 16. Particulate filter 16 may be based on a porous ceramic matrix such as cordierite, mullite, aluminum titanate, or silicon carbide. If necessary, the decontaminating member 14 and the particulate filter 16 may be mounted in the same housing.
The exhaust line 12 is also fitted with two sensors 18, 19 for measuring pressure. One of the sensors 18 is disposed upstream of the particulate filter 16, and the other sensor 19 is disposed downstream of the particulate filter 16. The sensors 18, 19 for measuring the pressure allow measuring the pressure difference between the inlet and the outlet of the particle filter 16, from which the amount of accumulated particles can be deduced. For this purpose, a map is used which establishes a correlation between the pressure variation measurement and the amount of particles in the particulate filter 16 as a function of the intake air flow.
A computer 22 is also provided to ensure control of the operation of the heat engine 10. The computer 22 includes a memory that stores software instructions for implementing the methods detailed below.
A method for controlling a heat engine 10 according to the invention is described below with reference to fig. 2 and 3.
In step 101, in the case where the running condition of the motor vehicle satisfies the measurement of the amount of particulates accumulated in the particulate filter 16, such measurement is performed. The measurement of the accumulated amount of particles is based on a measurement of the pressure change between the inlet and the outlet of the particle filter 16, which is performed by the pressure sensors 18, 19.
In the case where the running condition of the motor vehicle does not satisfy the measurement of the amount of particulate matter accumulated in the particulate filter 16, information called key client information is generated in step 102. When the volume flow rate of the exhaust gas exceeds a predetermined threshold, it is considered that the running condition is satisfied to allow the accumulated particulate amount to be measured, and when the volume flow rate of the exhaust gas falls below the predetermined threshold, it is considered that the running condition is no longer satisfied to allow the accumulated particulate amount to be measured. The predetermined threshold value is, for exampleAt 0.010m3S to 0.020m3Is between/s, and is preferably 0.015m3/s。
When the amount of particulates accumulated in the particulate filter 16 exceeds a threshold value and/or when information, called critical client information, is generated within a travel distance exceeding a threshold value or a time period exceeding a threshold value, the method comprises a step 103 for activating at least one reconfiguration mode of the thermal engine 10, which is intended to prevent any regeneration of the particulate filter 16. According to an embodiment, the critical threshold value of the cumulative particle amount is between 12 and 20 grams, and preferably 15 grams. The threshold travel distance is between 500km and 2000km, and the threshold time period is between 4 hours and 15 hours, and preferably 8 hours.
More specifically, the reconfiguration mode of the heat engine 10 is to disable injection interruption, limit the performance of the heat engine 10, or use a rich air/fuel mixture.
The injection interruption inhibition is carried out in order to inhibit all unsafe injection interruptions, so as to avoid an excess of oxygen in the exhaust gas, which would allow the regeneration to be initiated, that is to say, so as to avoid the oxygen ratio at the inlet of the particulate filter 16 reaching a threshold of approximately 2%. Therefore, when the accelerator is released, fuel injection is continued, contrary to normal operation, to minimize the amount of oxygen that may enter the particulate filter 16 and reduce the exhaust gas temperature at the inlet of the particulate filter 16.
The limitation of the performance of the heat engine 10 is implemented to limit the load of the heat engine 10 as a function of the rotational speed. This allows limiting the operating range in which the exhaust gas temperature may be too high and natural regeneration may be initiated, especially when the exhaust gas temperature exceeds a value of about 550 ℃. The calibration of the maximum load authorized as a function of the rotational speed is carried out as a function of the gas temperature upstream of the particulate filter 16 in order to limit the exhaust gas temperature upstream of the particulate filter 16 to a temperature threshold of, for example, approximately 450 ℃.
Thus, the engine range of fig. 3 shows the principle of limiting the torque C in dependence on the engine speed R and the temperature T of the exhaust gas upstream of the particulate filter 16. Thus, with limited performance, region Z1 of the engine range is authorized where the exhaust temperature T is less than 450 ℃ in region Z1, whereas the engine 10 will not be authorized to operate in region Z2 of the engine range where the exhaust temperature T is greater than 450 ℃.
In normal operation, a gasoline engine is operated stoichiometrically, that is to say with a fuel quantity which is matched to the air quantity entering the engine, in order to have an air/fuel mixture richness value which varies around 1. In a reconfiguration mode using a rich air/fuel mixture, the adjustment may be modified by applying an abundance greater than 1 in order to limit the amount of oxygen entering the particulate filter 16. That is, the amount of fuel is larger than that corresponding to stoichiometry.
Within the scope of vehicle maintenance, controlled regeneration of the particulate filter is carried out by qualified operators when the driver is faced with a fault known as a critical customer failure.

Claims (10)

1. Method for controlling a gasoline-type heat engine (10), in particular of a motor vehicle, connected to an exhaust line (12) comprising a particulate filter (16), characterized in that it comprises:
-a step (101) of making a measurement of the accumulated amount of particles in the particulate filter (16) in the event that the driving conditions of the motor vehicle are satisfied;
-a step (102) of generating information, called critical client information, in the case where the running conditions of the motor vehicle do not satisfy the measurement of the accumulated amount of particles in the particulate filter (16);
and when said accumulated amount of particles exceeds a threshold value and/or when said information, called critical client information, is generated within a distance travelled exceeding a threshold value or a time period exceeding a threshold value,
-the method comprises a step (103) for activating at least one reconfiguration mode of the thermal engine (10) for preventing any regeneration of the particulate filter (16) and informing the driver of the vehicle of an operational failure of the thermal engine (10).
2. The method according to claim 1, characterized in that the reconfiguration mode of the heat engine (10) comprises:
inhibiting interruption of injection, or
-limiting the performance of the heat engine (10), or
-using a rich air/fuel mixture.
3. Method according to claim 2, characterized in that injection interruption prohibition is implemented in order to prohibit any unsafe injection interruption in order to avoid oxygen excess in the exhaust gas, which oxygen excess allows to initiate regeneration of the particulate filter (16).
4. A method according to claim 3, characterized in that when the acceleration means are released, fuel injection is continued in order to minimize the amount of oxygen that can enter the particle filter (16) and to reduce the exhaust gas temperature at the inlet of the particle filter (16).
5. The method according to any one of claims 2 to 4, characterized in that the limitation of the performance of the heat engine (10) is implemented so as to limit the load of the heat engine (10) as a function of the rotational speed.
6. A method according to claim 5, characterised in that the calibration of the maximum load granted according to the rotational speed is performed according to the gas temperature upstream of the particulate filter (16) in order to limit the exhaust gas temperature upstream of the particulate filter (16) to a threshold temperature of for example about 450 ℃.
7. A method according to any one of claims 2 to 6, characterised in that the use of a high abundance air/fuel mixture is to apply an abundance of air/fuel mixture greater than 1 to limit the amount of oxygen entering the particulate filter (16).
8. The method according to any one of claims 1 to 7, characterized in that the measurement of the accumulated particle amount is performed on the basis of a measurement of the pressure change between the inlet and the outlet of the particle filter (16).
9. An engine computer (22) comprising a memory storing software instructions for implementing a method for controlling a heat engine (10) according to any of the preceding claims.
10. A heat engine (10) comprising an engine computer (22) according to claim 9.
CN201880059851.XA 2017-09-19 2018-09-05 Method for controlling a heat engine Pending CN111094709A (en)

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FR1758654A FR3071274B1 (en) 2017-09-19 2017-09-19 CONTROL PROCEDURE OF A THERMAL ENGINE
FR1758654 2017-09-19
PCT/FR2018/052162 WO2019058043A1 (en) 2017-09-19 2018-09-05 Heat engine control method

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060096280A1 (en) * 2004-11-05 2006-05-11 Southwest Research Institute Method for controlling temperature in a diesel particulate filter during regeneration
CN102052129A (en) * 2009-11-10 2011-05-11 通用汽车环球科技运作公司 Exhaust gas oxygen concentration control system and method
WO2011128543A1 (en) * 2010-04-14 2011-10-20 Peugeot Citroën Automobiles SA Method for regenerating a particle filter
CN102345492A (en) * 2010-07-28 2012-02-08 通用汽车环球科技运作有限责任公司 Apparatus and method for monitoring regeneration frequency of a vehicle particulate filter
CN104066940A (en) * 2012-01-13 2014-09-24 日立建机株式会社 Construction machine
CN105201607A (en) * 2014-06-18 2015-12-30 菲亚特汽车集团有限公司 System and method for estimating the quantity of particulate accumulated in the particulate filter of a diesel engine
CN106468207A (en) * 2015-08-20 2017-03-01 福特环球技术公司 Independently in controlled vehicle particulate filter regeneration

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928967B1 (en) * 2008-03-20 2010-04-02 Renault Sas REGENERATION WITHOUT OVERHEATING AN AUTOMOTIVE VEHICLE POST-PROCESSING DEVICE
FR2964413B1 (en) * 2010-09-02 2016-07-01 Peugeot Citroen Automobiles Sa PARTICLE FILTER HAVING THREE CATALYTIC COATINGS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060096280A1 (en) * 2004-11-05 2006-05-11 Southwest Research Institute Method for controlling temperature in a diesel particulate filter during regeneration
CN102052129A (en) * 2009-11-10 2011-05-11 通用汽车环球科技运作公司 Exhaust gas oxygen concentration control system and method
WO2011128543A1 (en) * 2010-04-14 2011-10-20 Peugeot Citroën Automobiles SA Method for regenerating a particle filter
CN102345492A (en) * 2010-07-28 2012-02-08 通用汽车环球科技运作有限责任公司 Apparatus and method for monitoring regeneration frequency of a vehicle particulate filter
CN104066940A (en) * 2012-01-13 2014-09-24 日立建机株式会社 Construction machine
CN105201607A (en) * 2014-06-18 2015-12-30 菲亚特汽车集团有限公司 System and method for estimating the quantity of particulate accumulated in the particulate filter of a diesel engine
CN106468207A (en) * 2015-08-20 2017-03-01 福特环球技术公司 Independently in controlled vehicle particulate filter regeneration

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