Classifications

• • 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
  • 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
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
  • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
• • 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
  • F01N3/027—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 using electric or magnetic heating means
• • 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
  • F01N3/033—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 in combination with other devices
  • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W2540/00—Input parameters relating to occupants
  • B60W2540/12—Brake pedal position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2300/00—Purposes or special features of road vehicle drive control systems
  • B60Y2300/47—Engine emissions
  • B60Y2300/476—Regeneration of particle filters
• • 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
  • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
  • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
• • 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
  • F02D2200/0625—Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
• • 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
  • F02D2200/0804—Estimation of the 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
• • 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

Definitions

• the invention relates to a method for controlling the regeneration of an electrostatic particle filter fitted to the exhaust line of the internal combustion engine of a motor vehicle.
• the regeneration is applied by electric heating of the particulate filter. It is triggered according to functional parameters of the motor vehicle that are sent to a calculator.
• particulate filters inserted into the exhaust lines of the engines. These particulate filters are adapted to trap the soot particles contained in the exhaust gas.
• Controlled regeneration devices make it possible to periodically burn the particles trapped in the particulate filters and avoid clogging them. It is desirable that the regeneration of a particulate filter does not penalize the performance and has the least impact on the cost of consumption of the engine.
• soot particles burn at temperatures of the order of 500 to 600 ° C.
• thermal levels are only rarely achieved by the exhaust gas of a motor vehicle diesel engine, for example in the city, the temperature of the exhaust gases varies between 150 ° and 250 ° C.
• Various regeneration systems have been proposed, in particular, electric resistance heating systems, to bring the temperature of the exhaust gas to a value sufficient to cause the combustion of particles in the particulate filter.
• regeneration aid systems The activation of such regeneration aid systems is controlled by a control computer which determines, as a function of a certain number of parameters, the time of the regeneration.
• electrical power demanded by electrical auxiliaries such as electrical resistance
• Regeneration of the particulate filter can therefore result in overconsumption of fuel or, if the alternator can not provide the instantaneous power, a discharge of the battery.
• the object of the present invention is to limit the fuel consumption due to an electric heating system used for the regeneration of a particulate filter.
• the invention proposes that the regeneration control computer receives parameters making it possible to determine the fuel consumption related to the production of electricity for the heating means necessary for the regeneration.
• the parameters coming from the vehicle are, for example, the position of the pedals, the speed of the vehicle, the gear engaged.
• FIG. 1 represents a schematic view of an internal combustion engine equipped with a particulate filter, implementing the method according to the invention.
• FIG. 2 represents a flowchart of the method according to the invention. Identical or similar elements are designated by the same reference numerals.
• FIG. 1 illustrates in a non-limiting way the implementation of the proposed regeneration principle.
• An internal combustion engine 1 is intended to equip a vehicle such as an automobile. This is, for example, a diesel engine turbocharged four-cylinder in-line and direct injection of fuel.
• the engine 1 is equipped with an exhaust line 5 provided with a device for filtering soot particles.
• the engine 1 is supplied with air by an intake circuit 2.
• Suitable sensors, and in particular a flowmeter 8 equip the intake circuit 2 to supply a control computer 3 with parameters relating, for example, to the pressure supplying the engine 1.
• the injection of the fuel into the cylinders is ensured by electromagnetic injectors, not shown, opening into the combustion chambers and controlled by the control computer 3 from a pressurized fuel circuit 4 of the common rail high pressure type.
• the exhaust gas discharged in line 5 passes through a particulate filter 6.
• the turbocharger comprises, in a conventional manner, a turbine 13 and a compressor 14. - AT -
• the control computer 3 comprises, in a limiting manner, a microprocessor or CPU, at least one random access memory, at least one read-only memory, at least one digital analog converter and at least one input / output interface.
• the microprocessor of the control computer 3 comprises electronic circuits and appropriate software, intended in particular for the different actuators controlled.
• the computer 3 controls the fuel pressure in the common rail 4 and the opening of the injectors from the parameters delivered by the various sensors, and in particular the intake air mass, the engine speed and the formulas and stored calibrations to achieve the desired levels of consumption and performance.
• the opening of the injectors is more particularly defined by the instant of injection start and the duration of opening of the injectors, duration which corresponds for a given supply pressure to a quantity of fuel injected and therefore to a richness of the mixture filling the combustion chambers.
• the computer 3 is also adapted to ensure the control of the operation of the exhaust system, and in particular of the particulate filter 6.
• the triggering of the regeneration of the particle filter 6 is controlled by the computer 3 which further determines its continuation or its interruption.
• the regeneration phase essentially consists in directly increasing the temperature of the soot so as to burn the trapped particles.
• the increase in temperature is initiated, for example, by electric heating means such as metal cords.
• the computer 3 takes into account various parameters, concerning the particulate filter 6, itself, and the vehicle for triggering the regeneration, for example, engine coolant temperatures, gases upstream and downstream of the particulate filter 6, the vehicle speed, the mass of soot accumulated in the particulate filter 6 and the distance traveled since the last regeneration.
• the computer 3 also receives other parameters relating to the fuel consumption due to the production of electricity to operate the heating system. These last parameters can include the position of the pedals Pf, Pacc, the speed V of the vehicle, the gear ratio H, the speed N of the engine, the torque M of the motor.
• FIG. 2 illustrates a flowchart of the method for controlling the regeneration of a proposed particulate filter.
• step 10 the computer notes various parameters such as the level of loading of the particle filter A, the speed V of the vehicle, the position of the acceleration pedal Pacc, the torque of the motor M, the engine speed N , the engaged ratio H, the temperature T of the particulate filter.
• step 1 after the computer 3 has noted as a parameter the loading level of the particulate filter A, a first test is performed on the level of the loading of the filter 6.
• step 17 If the loading level A is less than a predetermined threshold, called S1, S1 is greater than a threshold from which the regeneration is not necessary, called Smini, the next step is step 17, there is no regeneration.
• step 13 a new test is performed on the loading of the particle filter.
• the loading level A is then compared to a second predetermined threshold, called S2 (significant back pressure which requires regeneration without waiting for the driver to brake).
• S2 is greater than S1 and is less than a threshold where the regeneration becomes mandatory, called Smax.
• Smax a threshold where the regeneration becomes mandatory
• step 15 consists in that the computer 3 selects the values of various parameters having an influence on the fuel consumption, for example the vehicle speed V, the position of the acceleration pedal Pacc, the torque M of the engine, the engine speed N, the gear engaged H, the temperature T of the particulate filter.
• the engine efficiency F is calculated using selected parameters.
• the values of the various parameters allow the computer 3 to make a comparison between the engine efficiency G which would be obtained with a regeneration and the engine efficiency F obtained without regeneration.
• a mapping of the efficiency G of the motor obtained with a regeneration is memorized by the computer 3.
• a map of the Efficiency G is represented as a function of the following parameters: the motor torque M and the motor speed N.
• the values recorded by the computer 3 make it possible to determine the efficiency F of the engine on the stored map.
• the efficiency F of the engine is compared with the efficiency of the engine obtained with a regeneration G. If the regeneration improves the efficiency of the engine, it is activated, the next step is step 14.
• the loading level of the particulate filter A is compared with the threshold Smax in step 18. If the loading level A is less than Smax, the regeneration is not performed, it is step 17.
• the regeneration is then switched on immediately.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Processes For Solid Components From Exhaust (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Exhaust Gas After Treatment (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Family Cites Families (11)

• 2004
  • 2004-12-13 FR FR0452934A patent/FR2879242A1/fr not_active Withdrawn
• 2005
  • 2005-12-07 EP EP05824400A patent/EP1827893A1/de not_active Withdrawn
  • 2005-12-07 US US11/721,592 patent/US20090266050A1/en not_active Abandoned
  • 2005-12-07 JP JP2007544962A patent/JP2008523300A/ja not_active Withdrawn
  • 2005-12-07 WO PCT/FR2005/051052 patent/WO2006064148A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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