CN108087070A - Method for heatable catalytic converter and the motor vehicle with catalyst converter - Google Patents

Method for heatable catalytic converter and the motor vehicle with catalyst converter Download PDF

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Publication number
CN108087070A
CN108087070A CN201711164942.3A CN201711164942A CN108087070A CN 108087070 A CN108087070 A CN 108087070A CN 201711164942 A CN201711164942 A CN 201711164942A CN 108087070 A CN108087070 A CN 108087070A
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CN
China
Prior art keywords
catalyst converter
internal combustion
combustion engine
electrically heated
heated catalyst
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Granted
Application number
CN201711164942.3A
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Chinese (zh)
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CN108087070B (en
Inventor
L.施吕特
F-C.B.冯科伊默恩-林登斯杰纳
S.保克纳
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Volkswagen AG
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Volkswagen AG
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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
    • F02D41/02—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
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/025—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/101—Three-way catalysts
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating 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
    • F01N9/00—Electrical control of 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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • 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
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/11—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for hybrid vehicles
    • 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
    • F01N2900/1602—Temperature of exhaust gas 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
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The present invention relates to it is a kind of for heat in the exhaust steam passage of the motor vehicle with internal combustion engine can electrically heated catalyst converter method.For the heatable catalytic converter before engine starting, it is arranged to, electrical heating catalyst converter and has been started together with motor before the motor of internal combustion engine starts and realize effective exhaust after-treatment.Here, after the electric pre-heat phase after the motor starting by electrical heating with by unburned fuel component can electrically heated catalyst converter catalytic action surface on exothermic conversion caused by the combination of chemical heat realize the further heating of catalyst converter.In addition, the present invention relates to a kind of motor vehicles with internal combustion engine and waste gas system, wherein, the method according to the invention is performed.

Description

Method for heatable catalytic converter and the motor vehicle with catalyst converter
Technical field
It is carried the present invention relates to a kind of for heating the method for the catalyst converter in the waste gas system of motor vehicle and one kind It is arranged in the motor vehicle of the catalyst converter in waste gas system.
Background technology
Increasingly stringenter exhaust gas provides to propose vehicular manufacturer high requirement, by being used to reduce engine not It handles the corresponding measure of discharge and the requirement is realized by corresponding exhaust after-treatment.In order to can be effectively after engine The untreated discharge that can not be avoided completely is converted, the catalyst converter for being coated with noble metal is installed in the exhaust gas apparatus of internal combustion engine.For Make catalyst converter that can convert harmful substance, it is necessary to which the minimum temperature of exhaust gas and catalyst converter is horizontal.In order to internal combustion engine cold start it Catalyst converter is taken in running temperature as quickly as possible afterwards, using the hot measure of context engine, such as to " late " direction Adjust ignition angle or using the operation for bringing the substoichiometric of internal combustion engine in the case of auxiliary air at the same time.In order to Purposefully more thermal energy will also be wanted to bring into exhaust gas apparatus, it is possible to, electrical heating catalyst converter.It can urge as a result, Change in the heating period of device and be substantially reduced discharge.
In addition, as the introducing of the regulation grade EU6 for petrol engine defines the limiting value of amounts of particles, a variety of In situation, which causes the use of diesel particulate filter device to become necessary.In running operation, this diesel particulate mistake Filter is by carbon black loaded.In order to which exhaust back-pressure does not increase excessively, it is necessary to constantly or periodically make the diesel particulate filter device Regeneration.In order to be retained in the thermal oxide of the carbon black in diesel particulate filter device using oxygen execution, in the exhaust gas of petrol engine In equipment, very high temperature levels are needed in combination with simultaneous oxygen.Since the petrol engine of modernization leads to It is often run in the case of no oxygen excess with the combustion air ratio (λ=1) of stoichiometry, needs additional measure therefore.For This, as measure, such as is contemplated that the raising temperature adjusted by ignition angle, briefly dilute adjusting petrol engine, by two Secondary air is blown into exhaust gas apparatus or the combination of these measures.Preferably, adjusted so far using the ignition angle in the direction of towards evening With the combination of dilute adjusting of petrol engine because this method can be realized in the case of no additional member and gasoline send out Sufficient amount of oxygen can be provided in most operating point of motivation.
As known to 10 2,010 014 332 A1 of document DE it is a kind of be used to carrying by internal combustion engine and motor unit into mixing The method of the heat management of the exhaust gas apparatus of the motor vehicle of driving portion.Here, first by means of can electrically heated catalyst converter and air Incoming call preheating catalyst converter is blown into, and combines to change with the dense adjusting of internal combustion engine by blowing air into exhaust steam passage afterwards Learn ground heatable catalytic converter.However, the shortcomings that this method, electrically heated catalyst converter and should be heated and should be fatefully Show the separation between another catalyst converter of the conversion of harmful substance.In addition, exhaust steam passage is needed in the known process Secondary air supply, in order to be blown into required air before catalyst converter.
A kind of catalysis for heating in the exhaust steam passage of internal combustion engine as known to 2009/0293450 A1 of document US The method of device, wherein, catalyst converter are heated to by electrical heating in the first temperature before engine starting, and Reach and continued by the dense adjusting of combustion mixture and simultaneously bringing auxiliary air in exhaust steam passage into after first temperature It is heated in the firing temperature of catalyst converter, wherein, when reaching the firing temperature of catalyst converter, disable the electrical heating of catalyst converter.So And the shortcomings that this method is that this method needs secondary ventilation system, and thus only can be with internal combustion engine and secondary sky It is performed at the motor vehicle of gas system.
As known to 2008/0282673 A1 of document US it is a kind of for heat with by internal combustion engine and motor unit into Combination drive portion motor vehicle exhaust steam passage in catalyst converter method.Here, by engine before engine starting Controller measures the temperature of catalyst converter and in the case of less than critical-temperature, particularly in the case of internal combustion engine cold start Electrical heating catalyst converter and lag the starting of internal combustion engine, until catalyst converter is heated in the temperature limited.Here, first After secondary electrical heating, can by electrical heating and the measure of engine interior, for example to the ignition angle in " late " direction adjust come The heating of catalyst converter is concurrently carried out, the temperature of catalyst converter is kept in order to further heatable catalytic converter or after electrical heating is cut off Degree is on the limiting temperature for effective exhaust after-treatment.However, the shortcomings that this method, is, in the case of hysteresis Internal combustion engine can be started and vehicle can be only run by the motor of hybrid power driving portion until passing through in former seconds Electrical heating effectively gain of heat catalyst converter or does not have effective, heat operation urge also in the case of internal combustion engine across-the-line starting Change device.
The content of the invention
It is an object of the present invention to propose a kind of side of the catalyst converter for heating in the exhaust steam passage of internal combustion engine now Method, which overcomes the shortcomings that being known from the state of the art and realizes rapidly catalyst converter is heated in running temperature.
According to the present invention, the target by be used to heat in the waste gas system of internal combustion engine can electrically heated catalyst converter Method realization, wherein, it can surface of the electrically heated catalyst converter with electrical heating elements and catalytic action, particularly catalytic action Coating, and wherein, electrical heating elements can be manipulated via controller, be comprised the following steps：
- before engine starting electrical heating can electrically heated catalyst converter,
- concurrently heat and electrically heated can be catalyzed by electrical heating and simultaneously by the measure of the engine interior of internal combustion engine Device, wherein, unburned or partially combusted fuel composition part can electrically heated catalyst converter catalytic action surface on Convert to heat release,
- cut-out electrical heating elements and further heated by the measure of engine interior can electrically heated catalyst converter, wherein, For the oxygen needed for the exothermic conversion of unburned and/or partially combusted fuel composition part via the combustion chamber of internal combustion engine It is transported in waste gas system.
By the method according to the invention, realize the catalyst converter in the waste gas system of internal combustion engine is heated to it is such In temperature, at such a temperature, the notable transformation of harmful substance has been carried out by catalyst converter, wherein, waste gas system need not Auxiliary air is conveyed and thus can designed relatively easy and cost-effective.Here, catalyst converter leads to before motor moves It crosses electrical heating and reaches such temperature, i.e. at such a temperature, the surface requirements of catalytic action are unburned or partially combusted combustion Expect the chemical reaction of component.The chemistry of the catalyst converter of electrical heating by catalyst converter and the measure by engine interior adds The combination of heat is achievable to be, heat is generated directly in catalyst converter.It can reduce in catalyst converter, such as exhaust gas turbocharge as a result, Being evenly heated for the entire waste gas system of the turbine upstream of device, additionally accelerates the heating of catalyst converter as a result,.It as a result, can be more It rapidly realizes the firing temperature of catalyst converter and shortens the heating period of catalyst converter.Here, the chemical heat rank for passing through shortening Section can reduce excessive fuel and consume and can avoid cold start emission.In this regard, the chemical heat stage of catalyst converter is understood as Such measure, i.e. wherein, due to exothermic chemical reaction, unburned in particular or partially combusted fuel component with Oxygen can electrically heated catalyst converter catalytic action surface on conversion generate heat.
By the feature illustrated in the dependent claims, realize that is provided in the independent claim is used for heatable catalytic The favourable improving countermeasure and improvement project of the method for device.
It is arranged in the preferred designing scheme of the present invention, the measure of engine interior includes the specific oxygen tune in combustion chamber Section, wherein, first group of the combustion chamber of internal combustion engine is run using the combustion air ratio of hyperstoichiometry, and the combustion of internal combustion engine Burn room second group is run using the combustion air ratio of substoichiometric.The specific oxygen in combustion chamber, which is adjusted, to be accomplished that, together When unburned or partially combusted fuel composition part and oxygen are transported in exhaust steam passage.Pass through electricity preheating Catalyst converter can after by unburned or partially combusted fuel composition partial exothermic catalyst converter catalytic action table It converts on face, catalyst converter can be heated rapidly to as a result, in firing temperature.Here, firing temperature is such temperature, i.e. Catalyst converter makes 50% conversion of the exhaust gas component into catalyst converter at this temperature.Here, directly on the surface of catalyst converter The conversion of unburned or partially combusted fuel composition part is carried out, so as to heat its of waste gas system in time with staggering Its component.At least it is not directly to need after cold start up of the internal combustion engine as a result, compared with the ignition angle in the direction of towards evening is adjusted Heat the component in the waste gas system of catalyst converter upstream together immediately.These components can be heated with staggering in time, with reality The complete purification power of existing exhausted gas post-processing system.Furthermore, it is not necessary that secondary ventilation system, without additional structure Part.Provide as a result, for heat can electrically heated catalyst converter cost-effective and very effective implementation.
At this in particular it is preferred that occurring chemistry in exhaust steam passage of the downstream of the output section of internal combustion engine in waste gas system The exhaust gas of metering, wherein, the unburned or partially combusted fuel composition part of exhaust gas and existing remaining oxygen in the offgas Gas together can electrically heated catalyst converter catalytic action coating on by heat release convert.Pass through the chemistry in the heating period The exhaust gas of metering during the heating of chemistry, that is passes through exothermic chemistry on the surface of the catalytic action of catalyst converter During reaction heating, end pipe discharge can be greatly reduced.
Be arranged in another preferred designing scheme of this method, internal combustion engine can electrically heated catalyst converter heating rank Using hyperstoichiometry, dilute combustion air than operation in section, and by fuel can electrically heated catalyst converter upstream bring into In the exhaust steam passage of waste gas system.In particular using air excess operation internal combustion engine in, in such as diesel engine or In with the petrol engine of dilute operation work, it can alternatively be provided via the air excess of combustion mixture for exothermic reaction Oxygen.Here, the supply of fuel or can be injected fuel by (such as substantially after the top dead centre of piston) later In at least one into the combustion chamber of internal combustion engine or by being carried out directly by fuel distributing into exhaust steam passage.
It is arranged in another preferred form of implementation of method, institute's combuster of internal combustion engine electrically heated can be catalyzed It is periodically alternately more empty than the burning with substoichiometric using the combustion air of hyperstoichiometry during the heating period of device Gas ratio is run, wherein, in the case of the operation of the hyperstoichiometry of internal combustion engine, electrically heated it can be catalyzed using oxygen filling The oxygen reservoir of device, and in the case of the operation of the substoichiometric of internal combustion engine, unburned or partially combusted fuel Component heat release be stored in can be in electrically heated catalyst converter oxygen react.In this way, equally realize unburned Or exothermic conversion that partially combusted fuel composition part is on the surface of the catalytic action of catalyst converter, in order to from passing through electricity The temperature that heating is realized starts to continue heatable catalytic converter.
It is arranged in the preferred improvement project of method, by car door contact switch, for no key lock system Receiver, the receiver for central lock part or safety belt lock contact, start can electrically heated catalyst converter electrical heating.It is logical Often, driver internal combustion engine cold start advance into motor vehicle and driver fastens one's safety belt.By car door contact switch, It is opened for the transmitter of no key lock system (keyless access system) or the receiver of central lock part or safe contact-carrying Close, can be used at the motor vehicle existing for sensor, add in order to have begun electricity the time on before engine starting Heat.Here, car door contact switch and the receiver for the signal of locking system are especially preferred because herein opening or Time interval between opening car door and engine starting is relatively long, and it is thus achieved that can electrical heating in the time interval Catalyst converter effective heating.
In the vehicle automatically or semi-automatically run, also it can start electrical heating by driving the request of order, wherein, When can electrically heated catalyst converter reached the first threshold temperature when, just start internal combustion engine.
A preferred form of implementation according to the present invention is arranged to, when can electrically heated catalyst converter reach by electrical heating During one limiting temperature, start the heating measures of engine interior.In order to realize can electrically heated catalyst converter it is as effective as possible Heating, it is advantageous to when can electrically heated catalyst converter the first limiting temperature has been reached by electrical heating when, just start for chemistry The measure of the engine interior of heatable catalytic converter.If start before catalyst converter has reached first threshold temperature in engine The measure in portion, then this can cause the cooling of catalyst converter due to unburned fuel and higher discharge related to this.
It is arranged to according to another scheme that is advantageously improved of this method, internal combustion engine utilizes after the second threshold temperature is reached The combustion air ratio of stoichiometry is run, and terminates heating measures.If can electrically heated catalyst converter reach preferred status The second threshold temperature on the firing temperature of catalyst converter then adjusts the chemistry of internal combustion engine, the heating of engine interior is arranged It applies, and internal combustion engine is preferably by the combustion air ratio of stoichiometry to run in normal operation.Internal combustion is reduced as a result, The untreated discharge of machine and fuel consumption.
According to another form of implementation of this method, it is arranged to, is discharged when the such degree of the battery in electric drive portion so that mixed Close power drive portion in the predictable time, be switched in particular within coming minutes when being driven by internal combustion engine, will Can electrically heated catalyst converter be heated in running temperature.
According to the present invention it is proposed that it is a kind of with internal combustion engine, preferably carry by internal combustion engine and motor unit into combined drive Dynamic portion and the motor vehicle of waste gas system, be disposed in waste gas system it is at least one can electrically heated catalyst converter, wherein, it is motor-driven Vehicle, preferably internal combustion engine have controller, are set for carrying out the method according to the invention.
The present invention preferred form of implementation in be arranged to, for heat can electrically heated catalyst converter, preferably can electricity The current source of the ternary catalyzing unit of heating is the 48V onboard power systems of motor vehicle or the electric drive horse for driving hybrid electric vehicle The battery reached.Although it is relative difficulty and loses time since low voltage heats electrical catalyst converter using 12V onboard power systems , it is relatively easy using 48V onboard power systems and rapidly carry out can electrically heated catalyst converter heating.Alternatively, with In the hybrid electric vehicle of internal combustion engine and motor, for motor battery also be used as heat can electrically heated catalyst converter Voltage source.
If do not particularly set forth in concrete condition, the different implementations illustrated in this application document of the invention Form can be advantageously mutually combined.
Description of the drawings
Illustrate the present invention with reference to the accompanying drawings in embodiment below.Wherein：
Fig. 1 shows a preferred implementation modification of the drive system of motor vehicle according to the present invention,
Fig. 2 shows another view of motor vehicle according to the present invention,
Fig. 3 shows the temperature curve in the case of the catalyst converter in traditionally heating the waste gas system in internal combustion engine,
Fig. 4 shows the flow chart of the method according to the invention of the catalyst converter in the waste gas system of internal combustion engine for heating,
Fig. 5 show it is according to the present invention for heat can be in the method for electrically heated catalyst converter in catalyst converter temperature it is bent Line,
Fig. 6 show it is according to the present invention for the method in three measurement point heatable catalytic converters in exhaust steam passage when Another temperature curve in exhaust steam passage,
Fig. 7 shows an alternative form of implementation for the drive system of motor vehicle according to the present invention,
Fig. 8 shows another, the alternative form of implementation of the drive system of motor vehicle according to the present invention,
Fig. 9 shows another alternative form of implementation of the drive system of motor vehicle according to the present invention,
Figure 10 show the drive system of motor vehicle according to the present invention another alternative form of implementation and
Figure 11 shows another alternative form of implementation of the drive system of motor vehicle according to the present invention.
List of numerals
1 motor vehicle
10 internal combustion engines
12 combustion chambers
14 spark plugs
First group of 16 combustion chambers
Second group of 18 combustion chambers
20 waste gas systems
22 exhaust steam passages
24 turbines
26 can electrically heated catalyst converter
28 electrical heating elements
30 can electrically heated ternary catalyzing unit
32 second catalyst converters
34 second ternary catalyzing units
36 particulate filters
38 quaternary catalytic devices
40 can electrically heated quaternary catalytic device
42 controllers
44 door contacts switch
46 receivers
48 belt lock sensors
The surface of 50 catalytic action
52 output sections
54 batteries
56 electric drive motors
58 are used to identify the sensor of seat seat occupancy
60 the 3rd ternary catalyzing units
T temperature
T1Temperature before the turbine
T2Temperature before ternary catalyzing unit
T3Temperature in ternary catalyzing unit
T4First threshold temperature
T5Second threshold temperature
The starting of S internal combustion engines
The t times
λAWaste gas air ratio
λECombustion air ratio
λE16The combustion air ratio of first group of combustion chamber
λE18The combustion air ratio of second group of combustion chamber
The electrically heated starting of O catalyst converters
The I first stage
II second stage
The III phase IIIs
The electrical heating of IV catalyst converters
The chemical heat of V catalyst converters
The parallel electricity and chemical heat of VI catalyst converters.
Specific embodiment
Fig. 1 shows the first embodiment of the motor vehicle according to the present invention 1 with internal combustion engine 10 and waste gas system 20.Root Hybrid electric vehicle, particularly preferred area with internal combustion engine 10 and motor 56 are preferably configured to according to the motor vehicle 1 of the present invention There is the petrol engine by 14 outside igniting of spark plug.Internal combustion engine 10 has at least one combustion chamber 12, preferably such as in Fig. 1 In show as tool there are four combustion chamber 12, combustion chamber 12 is via common output section 52 and the exhaust steam passage of waste gas system 20 22 are connected.Waste gas system 20 on the flow direction of the exhaust gas of the exhaust steam passage 22 by waste gas system there is exhaust gas turbine to increase The turbine 24 of depressor.In the downstream of turbine 24, in exhaust steam passage 22 arrangement can electrically heated catalyst converter 26, catalyst converter 26 carries The surface 50 of electrical heating elements 28 and catalytic action, the coating for preferably carrying catalytic action.Can electrically heated catalyst converter 26 it is excellent Selection of land is configured to conductive gas ternary catalyzing unit 30, wherein, catalyst converter 26 itself functions as thermal resistance and thus when applying voltage As electrical heating elements 28.Can electrically heated 26 downstream of catalyst converter, another catalyst converter 32, preferably is arranged in exhaust steam passage 22 Another ternary catalyzing unit 34 in ground.Can electrically heated catalyst converter 26 electrical heating elements 28 can via controller 42, preferably via The engine controller of internal combustion engine 10 or the power controller of hybrid electric vehicle manipulate.The electric drive motor 56 of hybrid electric vehicle It powers via battery 54, battery 54 can also be used for heating electrical heating elements 28.The combustion chamber 12 of internal combustion engine 10 may be partitioned into first Group combustion chamber 16 and second group of combustion chamber 18, wherein, two groups 16,18 preferably have combustion chamber 12 as much.In Fig. 1 In the internal combustion engine 10 shown, two groups 16,18 are respectively provided with two combustion chambers 12.Internal combustion engine 10 is preferably configured to reciprocating work Piston engine, but also may be configured to rotary piston engine.Internal combustion engine 10 is preferably configured to by means of exhaust gas turbocharge The internal combustion engine 10 of device loading, but alternatively also may be configured to self-priming engine.
Another diagram of motor vehicle 1 according to the present invention is shown in FIG. 2.Motor vehicle 1 has with waste gas system 20 Internal combustion engine 10.In waste gas system 20, on the flow direction through the exhaust gas of the internal combustion engine 10 of exhaust steam passage 22, band is arranged Have an electrical heating elements 28 can electrically heated catalyst converter 26 and can electrically heated 26 the second catalyst converter of arranged downstream of catalyst converter 32, it is configured to ternary catalyzing unit 34.Motor vehicle 1 have multiple sensors 44,46,48, send signal to motor vehicle 1 At controller 42.In this way, door contact switch 44 is shown in FIG. 2, for the reception without key lock system of motor vehicle 46 Device and belt lock sensor 48.However, alternatively, or additionally, another sensor can be yet set, such as central locking The receiver of the transmitter in portion or the sensor 58 for identifying the seat occupancy at seat.
As being shown in FIG. 4, can it is described below for heat can electrically heated catalyst converter 26 according to the present invention Method flow：In moment O, internal combustion engine 10 obtains signal, i.e. the engine that will start internal combustion engine 10 starts S.First In stage I, by electrical heating elements 28 can electrically heated catalyst converter 26 be heated to the first threshold temperature T4On.Here, at this In first stage, only by catalyst converter 26 electrical heating IV carry out can electrically heated catalyst converter 26 heating.Here, pass through biography The signal of one in sensor 44,46,48,58, especially by 44 activation electrical heating IV of door contact switch so that can substantially exist The motor of internal combustion engine 10 carries out the heating of catalyst converter 26 before starting S.Alternatively, electrical pre-add is carried out in such stage Heat, i.e. drive hybrid electric vehicle only by electric drive motor 56 in this stage and torque is not carried out by internal combustion engine 10 It provides.After the motor of internal combustion engine 10 starts S, being carried out in second stage II can electrically heated the 26 to the second threshold of catalyst converter Temperature T5On heating, be preferably the running temperature of catalyst converter 26 and on the firing temperature of catalyst converter 26.At this In second stage II, parallel heating VI is carried out by the electrical heating IV and chemical heat V of catalyst converter 26 first, in order to avoid Internal combustion engine 10 motor start S after directly make can electrically heated catalyst converter 26 cool down.It burns unburned as a result, or part Exhaust gas component be fed to together with required air it is pre-warmed can electrically heated catalyst converter 26.It is here, unburned Exhaust gas component, in particular unburned carbohydrate HC and partially combusted exhaust gas component, in particular an oxygen Change carbon CO together with oxygen can electrically heated catalyst converter 26 pre-warmed catalytic activity surface 50 at heat release react.By This, occur by can electrically heated catalyst converter 26 chemical and electrically heated combination.It here, can be electrically heated in order to chemically heat Catalyst converter 26, first group of 16 combustion air using hyperstoichiometry of combustion chamber 12 compare λE16＞ 1 is run, and combustion chamber 12 second group of 18 combustion air using substoichiometric compares λE16＜ 1 is run.Afterwards, in phase III III, in institute Combustion air in combuster 12 all using stoichiometry compares λE=1 runs internal combustion engine 10 and disables heating measures IV, V. Here, be shown in FIG. 6 heating according to the present invention can in the case of electrically heated catalyst converter 26 internal combustion engine 10 burning it is empty Gas compares λE。
In traditional catalyst converter heating strategy, for example by the direction in " evening " adjust internal combustion engine 10 ignition angle or Person is generated directly at the output section of internal combustion engine 10 52 in turbocharger by the way that auxiliary air is blown into exhaust steam passage 22 The necessary heat of 24 upstream of turbine and it is conveyed to exhaust steam passage 22.Here, by two kinds of action principles from up to catalyst converter 26 Path on exhaust gas in extract heat.On the one hand, the cold component in 26 upstream of catalyst converter is heated according to its thermal capacity.The opposing party Face, generated heat are given to via the surface of these components at environment.This causes until the heat of catalyst converter 26 to be heated The shortcomings that losing and thus causing on time and energy.The method for utilizing proposed combination, can be by means of electrical heating elements 28 directly can electrically heated catalyst converter 26 catalytic action surface 50 on carry out catalyst converter 26 chemical heat V.
Due to when motor starts S can the temperature of electrically heated catalyst converter 26 be preferably located on the first threshold temperature T4With On, low exhaust gas discharge is anticipated herein.It apparent in time can earlier be carried out by the method according to the invention significant Harmful substance converts, because in traditional method, catalyst converter has environment temperature in the case of the motor of internal combustion engine 10 starts S Degree.
It in figure 3, can be in the case of electrically heated catalyst converter 26, in cut-out electricity in traditionally heatable catalytic converter 26, for example In the case of heating element 28, show in the exhaust steam passage 22 of internal combustion engine 10 in three measurement point T1、T2And T3The temperature at place Curve.Here, the first measurement point is in 24 upstream of turbine of exhaust-driven turbo-charger exhaust-gas turbo charger, the second measurement point T2In 26 upstream of catalyst converter, And the 3rd measurement point is in catalyst converter 26.
In fig. 5 it is shown that it can be shown in heating according to the present invention in the case of electrically heated catalyst converter 26 identical Three measurement point T1,T2And T3The temperature curve at place.
Fig. 7 to 11 shows the alternative form of implementation of motor vehicle 1 shown in FIG. 1.Here, substantially the same In structure, the waste gas system 20 of internal combustion engine 10 and internal combustion engine 10 is only respectively illustrated.
In the waste gas system being shown in FIG. 7, in other aspects in the case of identical structure shown in FIG. 1, Can electrically heated catalyst converter 26 be arranged in 32 downstream of the second catalyst converter.Since the second catalyst converter 32 is when motor starts S or cold , unburned or partially combusted exhaust gas component flows through the second catalyst converter and pre- without chemical reaction ground as far as possible It is converted to ability heat release on the surface of the catalytic action of the catalyst converter 26 of heating.
In the form of implementation being shown in FIG. 8, in other aspects in the case of identical structure shown in FIG. 1, In waste gas system 20 can electrically heated catalyst converter 26 downstream and be additionally arranged in the upstream of the second catalyst converter 32 Grain filter 36.Alternatively, additional particulate filter 36 can also be arranged in the second catalyst converter 32 as being shown in FIG. 9 Downstream.Alternatively, the functionality of the second ternary catalyzing unit 34 and particulate filter 36 can be also bonded in a component, and It, can be in exhaust steam passage 22 can electrically heated 26 downstream of catalyst converter as the second catalyst converter 32 as being shown in FIG. 10 Arrange quaternary catalytic device 38.
Another embodiment of the waste gas system 20 of motor vehicle 1 according to the present invention is shown in FIG. 11.Here, internal combustion engine 10 exhaust gas first flows through the second catalyst converter 32, in particular the second ternary catalyzing unit 34, flow through afterwards the 3rd catalyst converter 60 and It is final flow through can electrically heated catalyst converter 26, wherein, can electrically heated catalyst converter 26 be configured to can electrically heated quaternary catalytic device 40.Here, electrical heating elements 28 cannot be only used for using the method according to the invention can electrically heated quaternary catalytic device 40 plus Heat in running temperature, and available for burnup be retained in can be in electrically heated quaternary catalytic device 40 carbon black in the case of it is auxiliary Helping can electrically heated quaternary catalytic device 40.

Claims (10)

1. one kind for heat in the waste gas system (20) of internal combustion engine (10) can electrically heated catalyst converter (26) method, In, it is described can electrically heated catalyst converter (26) there is the surface (50) of electrical heating elements (28) and catalytic action, and wherein, The electrical heating elements (28) can manipulate via controller (42), the described method comprises the following steps：
- before the internal combustion engine (10) starting described in electrical heating can electrically heated catalyst converter (26),
- by electrical heating and simultaneously by the measure of the engine interior of internal combustion engine (10) concurrently heat it is described can electricity plus Heat catalyst converter (26), wherein, unburned or partially combusted fuel composition part it is described can electrically heated catalyst converter (26) by heat release converted on the surface (50) of catalytic action,
- cut-out the electrical heating elements (28) and by the measure of engine interior further heat described in can be electrically heated Catalyst converter (28), wherein, for the oxygen needed for the exothermic conversion of described unburned or partially combusted fuel composition part It is transported to via the combustion chamber (12) of the internal combustion engine (10) in the waste gas system (20).
2. according to the method described in claim 1, it is characterized in that, the measure of the engine interior is specific including combustion chamber Oxygen is adjusted, wherein, first group (16) of the combustion chamber (12) of the internal combustion engine (10) utilize the combustion air ratio of hyperstoichiometry (λE＞ 1) it runs, and second group (18) of the combustion chamber (12) of the internal combustion engine (10) utilize the burning of substoichiometric Air ratio (λE＜ 1) it runs.
3. according to the method described in claim 2, it is characterized in that, exist in the downstream of the output section of the internal combustion engine (10) (52) Occurs the exhaust gas (λ of stoichiometry in exhaust steam passage (22)A=1), wherein, the unburned or partially combusted combustion of the exhaust gas Expect component together with the remaining oxygen present in the exhaust gas it is described can electrically heated catalyst converter (26) catalysis make Surface by heat release converts on (50).
4. according to the method described in claim 1, it is characterized in that, the internal combustion engine (10) it is described can electrically heated catalyst converter (26) hyperstoichiometry, thinning combustion air ratio (λ is utilized in heating periodE＞ 1) it runs, and by fuel in institute State can electrically heated catalyst converter (26) upstream bring into the exhaust steam passage (22) of the waste gas system (20).
5. according to the method described in claim 1, it is characterized in that, institute's combuster (12) of the internal combustion engine (10) is described Combustion air ratio (the λ of hyperstoichiometry periodically can be alternately utilized during the heating period of electrically heated catalyst converter (26)E＞ And the combustion air of substoichiometric ratio (λ 1)E＜ 1) it runs, wherein, run the internal combustion engine (10) in hyperstoichiometry When, using oxygen fill described in can electrically heated catalyst converter (26) oxygen reservoir (OSC), and run in substoichiometric During internal combustion engine (10), described unburned or partially combusted fuel composition partial exothermic be stored in it is described can electricity plus Oxygen reaction in the catalyst converter (26) of heat.
6. the method according to any one of claims 1 to 5, it is characterized in that, by car door contact switch (44), being used for It, can electricity described in starting without key lock system or the central receiver (46) of signal of lock part or safety belt lock contact (48) The electrical heating of the catalyst converter (26) of heating or battery (54) such journey of electric drive motor (56) when hybrid power driving portion It, can electrically heated catalyst converter (26) described in heating when the electric discharge of degree ground is so that will be switched on internal combustion engine.
7. method according to any one of claim 1 to 6, when it is described can electrically heated catalyst converter (26) pass through electrical heating The first limiting temperature (T is reached4) when, start the heating measures of the engine interior.
8. method according to any one of claim 1 to 7, which is characterized in that the internal combustion engine (10) is reaching second Threshold temperature (T5) the combustion air ratio (λ of stoichiometry is utilized afterwardsE=1) run, and terminate the heating measures.
9. one kind is with internal combustion engine (10) and the motor vehicle (1) of waste gas system (20) and controller (42), in the exhaust gas system System (20) in be disposed with it is at least one can electrically heated catalyst converter (26), the controller be set for perform according to right will Seek the method any one of 1 to 8.
10. motor vehicle (1) according to claim 9, which is characterized in that for heat it is described can electrically heated three-element catalytic The current source of device (26) is the 48V onboard power systems of the motor vehicle (1) or the electric drive motor for supplying the motor vehicle (1) (56) battery.
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