CN102654075B - The method of operation vehicle - Google Patents

The method of operation vehicle Download PDF

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Publication number
CN102654075B
CN102654075B CN201210053099.2A CN201210053099A CN102654075B CN 102654075 B CN102654075 B CN 102654075B CN 201210053099 A CN201210053099 A CN 201210053099A CN 102654075 B CN102654075 B CN 102654075B
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CN
China
Prior art keywords
temperature
oxidation catalyzer
combustion threshold
threshold temperature
adjustment
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Expired - Fee Related
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CN201210053099.2A
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Chinese (zh)
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CN102654075A (en
Inventor
D.M.范布伦
小托马斯.拉罗斯
K.杰克逊
M.V.泰勒
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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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
    • 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
    • F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust 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
    • F01N3/08—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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F02D41/405—Multiple injections with post injections
    • 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
    • F01N2430/08—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing
    • F01N2430/085—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing at least a part of the injection taking place during expansion or exhaust stroke
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • 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
    • F01N2900/0421—Methods of control or diagnosing using an increment counter when a predetermined event occurs
    • 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
    • F01N2900/1621—Catalyst conversion efficiency
    • 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
    • F01N2900/1626—Catalyst activation 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
    • 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
    • F01N3/025—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 fuel burner or by adding fuel to exhaust
    • F01N3/0253—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 fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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
    • 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

Abstract

The present invention relates to as avoiding the oxidation catalyzer combustion threshold adjustment of extinguishing, disclose the method for a kind of control for the exhaust treatment system of motor, comprise the tracked use of oxidation catalyzer and temperature drift value to set up and contact, current combustion threshold temperature is increased, to define the combustion threshold temperature through adjustment with by temperature drift value.When the temperature of oxidation catalyzer is equal to or greater than the combustion threshold temperature through adjustment, hydrocarbon can be injected in waste gas streams.Hydrocarbon is injected into temperature present in waste gas streams and is increased thus, and to adapt to the performance degradation of oxidation catalyzer, it extends the life-span of oxidation catalyzer.

Description

The method of operation vehicle
Technical field
The present invention is broadly directed to the method for operation vehicle, and more specifically, relates to the method controlled for the exhaust treatment system of the motor of vehicle.
Background technique
Exhaust treatment system for internal-combustion engine can comprise oxidation catalyzer, for the treatment of the waste gas streams from motor.If internal-combustion engine is diesel engine, then oxidation catalyzer can be called diesel oxidation catalyst (DOC).Oxidation catalyzer is circulation device, and it comprises the tank holding substrate or cellular structure.Substrate has large surface area, and described surface area scribbles active catalyst layer.Along with waste gas is through active catalyst layer, carbon monoxide, hydrocarbon gas and liquid hydrocarbon particulate, namely unburnt fuel and/or oil, oxidized, reduces harmful discharge thus.
But in order to allow active catalyst layer oxidizing carbon monoxide, hydrocarbon gas and liquid hydrocarbon particulate, active catalyst layer must be in initiation temperature or on it.Usually, once active catalyst layer reaches initiation temperature, extra hydrocarbon is by fuel injection (late post fuelinjection) after evening or inject waste gas streams by hydrocarbon injector.The extra hydrocarbon injecting waste gas streams can be lighted, with further heat exhaust gases stream.
The performance of oxidation catalyzer reduces in time when vehicle uses, and this is because the loss of active catalyst material and/or the sintering that caused by high exhaust gas temperature cause.This reduction can cause the increase of initiation temperature, and this can cause the extinguishing of oxidation catalyzer.The extinguishing of oxidation catalyzer is defined as, the stopping of the oxidizing hydrocarbon occurred when the temperature of active catalyst layer is reduced under initiation temperature.The extinguishing of oxidation catalyzer can cause too much hydrocarbon to escape from oxidation catalyzer, reduce the performance of exhaust treatment system thus, maybe can cause the collection of hydrocarbon on the substrate of oxidation catalyzer, once reach initiation temperature and the hydrocarbon be collected start oxidation, this can cause too high temperature.
Summary of the invention
Provide a kind of method operating vehicle.The method comprises follows the trail of the use of oxidation catalyzer, and the tracked use of oxidation catalyzer and temperature drift value is set up and contact.Current combustion threshold temperature is adjusted by temperature drift value, to define the combustion threshold temperature through adjustment.When the temperature of oxidation catalyzer is equal to or greater than the combustion threshold temperature through adjustment, hydrocarbon is injected in waste gas streams, regenerates to make oxidation catalyzer.
Additionally provide a kind of method that control has the exhaust treatment system of the vehicle of motor.The method comprises follows the trail of the use of oxidation catalyzer, and the tracked use of oxidation catalyzer and temperature drift value is set up and contact.Current combustion threshold temperature is adjusted by temperature drift value, to define the combustion threshold temperature through adjustment.The method also comprises the request detecting and oxidation catalyzer is regenerated.Sensing is carried out to the temperature of waste gas streams, to determine whether the temperature of waste gas streams is equal to or greater than the combustion threshold temperature through adjustment.When the temperature of oxidation catalyzer is equal to or greater than the combustion threshold temperature through adjustment, hydrocarbon is injected in waste gas streams, regenerates to make oxidation catalyzer.When the temperature that the method also comprises identification oxidation catalyzer falls under the burning critical temperature of adjustment, when extinguishes, and when oxidation catalyzer extinguishes, stop hydrocarbon being injected in waste gas streams to detect oxidation catalyzer.By the combustion threshold temperature through adjustment compared with maximum combustion threshold temperature, to determine whether the combustion threshold temperature through adjustment is less than or equal to maximum combustion threshold temperature.The quantity that oxidation catalyzer is determined to be in the event of the combustion threshold temperature extinguishing through adjustment is tracked.When the quantity of event is greater than preset limit and is less than maximum combustion threshold temperature through the combustion threshold temperature of adjustment, the combustion threshold temperature through adjustment is increased enduringly.
Correspondingly, by increasing the temperature relevant with the degeneration of oxidation catalyzer gradually, in this temperature, hydrocarbon is injected in waste gas streams, that is, through the combustion threshold temperature of adjustment, oxidation catalyzer can not become extinguishing.Prevent oxidation catalyzer from becoming extinguishing, help avoid temperature gradient and/or the extreme temperature of the miscellaneous part striding across oxidation catalyzer and/or the exhaust treatment system in oxidation catalyzer downstream.Along with the performance degradation of oxidation catalyzer, this extends the working life of the miscellaneous part of oxidation catalyzer and/or exhaust treatment system.
Above-mentioned Characteristics and advantages of the present invention and other Characteristics and advantages are by from being used for implementing the following detailed description of optimal mode of the present invention together with apparent during accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method that operations according to the instant invention vehicle is shown.
Embodiment
With reference to figure 1, the method for operation vehicle indicates substantially at 20 places.The method 20 of operation vehicle comprises control exhaust treatment system, and described exhaust treatment system is for the treatment of the waste gas of the internal-combustion engine from vehicle.Internal-combustion engine can include but not limited to diesel engine or petrol engine.Method 20 can be embodied as the algorithm that can run on the controller of vehicle.
Exhaust treatment system comprises oxidation catalyzer.If motor is diesel engine, then oxidation catalyzer can be called diesel oxidation catalyst (DOC).Oxidation catalyzer is circulation device, and it comprises the tank holding substrate or cellular structure.Substrate has large surface area, and described surface area scribbles active catalyst layer.Oxidation catalyzer process, from the waste gas streams of motor, to reduce the toxicity of waste gas, namely reduces the toxic discharge of waste gas, includes but not limited to nitrogen oxide (NO), carbon monoxide (CO) and/or hydrocarbon (HC).Along with waste gas is by active catalyst layer, carbon monoxide, hydrocarbon gas and liquid hydrocarbon particulate, namely unburnt fuel and/or oil, oxidized, reduces harmful discharge thus.Active catalyst material can comprise platinum group metal (PGM), and be nitrogen and carbon dioxide or water by the conversion of nitrogen oxides of the certain percentage in waste gas, and the Oxidation of Carbon Monoxide of certain percentage is carbon dioxide and is carbon dioxide and water by the unburnt oxidizing hydrocarbon of certain percentage.
Active catalyst layer must become in active catalyst layer and can operate and before antioxidant nitroxide, carbon monoxide and unburnt hydrocarbon, be heated to the initiation temperature of catalyzer.Correspondingly, active catalyst layer before the reaction between active catalyst layer and waste gas starts, must be heated to initiation temperature by waste gas.In order to the miscellaneous part (including but not limited to, particulate filter and/or selective catalytic reduction unit) of heated oxide catalyst converter and/or exhaust treatment system rapidly, hydrocarbon can be injected into waste gas streams.Hydrocarbon is lighted, and to produce heat in waste gas, heat is passed to the miscellaneous part of oxidation catalyzer and/or exhaust treatment system.Hydrocarbon by injection process after evening or can be injected into by hydrocarbon injector.After oxidation catalyzer has reached combustion threshold temperature (being greater than initiation temperature), hydrocarbon has been injected into, oxidized through active catalyst layer to guarantee the hydrocarbon be injected into.
The performance of oxidation catalyzer lowers with use or is deteriorated, and this is the loss due to the catalyst material from active catalyst layer, and also due to the sintering of substrate.Along with oxidation catalyzer is degenerated due to use, the initiation temperature of oxidation catalyzer rises.If the initiation temperature of oxidation catalyzer is increased to the temperature on combustion threshold temperature, then hydrocarbon can escape from oxidation catalyzer and/or is trapped on the substrate of oxidation catalyzer and is not oxidized.In order to avoid this situation, method 20 described herein improves combustion threshold temperature according to the use of oxidation catalyzer, with the performance of the initiation temperature and reduction that adapt to the increase of oxidation catalyzer, guarantee that hydrocarbon is not injected into waste gas when oxidation catalyzer is not in initiation temperature thus.
Method 20 is included in the use of the life period tracking oxidation catalyzer of exhaust treatment system, is substantially indicated by frame 22.Follow the trail of the use of oxidation catalyzer, can include but not limited to, the time period run in the total kilometrage following the trail of vehicle, the running temperature history of following the trail of oxidation catalyzer between the vehicle spreadable life or each in multiple predetermined temperature range of tracking oxidation catalyzer.Correspondingly, the amount of time that oxidation catalyzer runs in each specific range of temperatures can be tracked.Oxidation catalyzer, when running longer time section with higher temperature, can be degenerated faster.Like this, the different operating conditionss of following the trail of at oxidation catalyzer operation provide more accurately estimating of the degeneration of oxidation catalyzer, provide thus and estimate more accurately therefore to correct.
The tracked use of oxidation catalyzer and temperature drift value are set up and are contacted, and are substantially indicated by frame 24.Temperature drift value is a temperature value, and this temperature value is relevant, that is, associated with it with the level or degree being predicted to be the degeneration occurred in oxidation catalyzer for any given use amount.Temperature drift value can be determined by the test of exhaust treatment system or modeling, and/or is associated with the degree of degeneration found in oxidation catalyzer.The tracked use of oxidation catalyzer and temperature drift value are set up contact, can include but not limited to, with reference to the relation of at least one in the time that temperature drift value contact to running temperature history or the oxidation catalyzer of the total kilometrage of vehicle, oxidation catalyzer is run in predetermined temperature range.Described relation can be referenced, such as, at least one by look-up table or by solving an equation, in the time that temperature drift value contact to running temperature history or the oxidation catalyzer of the total kilometrage of vehicle, oxidation catalyzer runs by described equation in predetermined temperature range.
Method 20 also comprises and adjusts current combustion threshold temperature (substantially indicate at frame 26) by temperature drift value, to define the combustion threshold temperature through adjustment.Current combustion threshold temperature is adjusted by temperature drift value is added to current combustion threshold temperature.Correspondingly, because temperature drift value causes the decline of the performance of oxidation catalyzer, temperature drift value is added to current combustion threshold temperature to make hydrocarbon be injected into temperature at waste gas to increase, the initiation temperature reducing the increase of the oxidation catalyzer be associated with the degeneration of oxidation catalyzer thus does not rise to the possibility on combustion threshold temperature.
This process is constantly performed at the life period of vehicle, until reach maximum combustion threshold temperature.Correspondingly, the combustion threshold temperature through adjustment can be defined as the current combustion threshold temperature through revising, and is readjusted by temperature drift value, to define the combustion threshold temperature through readjusting subsequently.Should be understood that temperature drift value is constantly changed according to the use of vehicle.Like this, along with oxidation catalyzer continues to degenerate, the value of temperature drift value continues to increase, until equal maximum combustion threshold temperature through the combustion threshold temperature of adjustment.
Method 20 also comprises the request detecting regenerating oxidation catalyst converter, is substantially indicated by frame 28.The request of regenerating oxidation catalyst converter can from vehicle control device etc.The request of regenerating oxidation catalyst converter triggers exhaust treatment system and is injected in waste gas by hydrocarbon, carrys out heated oxide catalyst converter, to burn the particle of catching thereon.
Method 20 also comprises carries out sensing to the temperature of waste gas streams, is substantially indicated by frame 30, to determine whether the temperature of waste gas streams is equal to or greater than the combustion threshold temperature through adjustment.The temperature of waste gas can at the upstream and downstream of oxidation catalyzer by sensing, and the difference between it is for determining the temperature of oxidation catalyzer.
Once vehicle has determined that oxidation catalyzer is in the temperature of the combustion threshold limit be equal to or greater than through adjustment, then method 20 has also comprised and has been injected in waste gas streams by hydrocarbon, is indicated by frame 32.As mentioned above, hydrocarbon by injection process after evening or can be injected into by hydrocarbon injector, after described evening, injection process is by the waste gas in hydrocarbon injection engine cylinder thorax, and hydrocarbon injects in the offgas in the downstream of motor and the upstream of oxidation catalyzer by described hydrocarbon injector.
Method 20 also comprises detection oxidation catalyzer and when extinguishes, and is substantially indicated by frame 34.When the temperature of active catalyst layer drops under the initiation temperature causing hydrocarbon to stop, oxidation catalyzer extinguishes.When detection oxidation catalyzer extinguishes to comprise identifies when the temperature of oxidation catalyzer falls under the combustion threshold temperature of adjustment.The temperature through sensing of the waste gas of the upstream and downstream of oxidation catalyzer, may be used for identifying or determine when the temperature of oxidation catalyzer falls under the combustion threshold temperature of adjustment.
If the temperature determining oxidation catalyzer has fallen under the combustion threshold temperature of adjustment and oxidation catalyzer extinguishes now, then method 20 has also comprised and stops hydrocarbon being injected in waste gas streams, is substantially indicated by frame 36.Stop hydrocarbon being injected in waste gas streams to prevent hydrocarbon from escaping from oxidation catalyzer and/or being gathered on the substrate of oxidation catalyzer.
If stop hydrocarbon being injected in waste gas streams, then method 20 also can comprise the combustion threshold temperature through adjustment compared with maximum combustion threshold temperature, substantially indicated by frame 38, to determine whether the combustion threshold temperature through adjustment is less than or equal to maximum combustion threshold temperature.If be less than maximum combustion threshold temperature through the combustion threshold temperature of adjustment, substantially in the instruction of 40 places, then method 20 can comprise the combustion threshold temperature increased provisionally through adjustment, substantially in the instruction of 42 places, to complete the regenerative cycle of oxidation catalyzer.If be equal to or greater than maximum combustion threshold temperature through the combustion threshold temperature of adjustment, substantially in the instruction of 44 places, then hold fire, substantially indicated by frame 46.
When being less than maximum combustion threshold temperature through the combustion threshold temperature of adjustment, substantially in the instruction of 48 places, vehicle can the quantity of track of events, and substantially indicated by frame 50, in described event, the combustion threshold temperature that oxidation catalyzer is determined to be in through adjustment is extinguished.The quantity oxidation catalyzer be tracked to being confirmed as the event extinguished compares with preset limit, is substantially indicated by frame 52, and to determine whether the quantity of event is greater than preset limit, the initiation temperature of instruction oxidation catalyzer has been increased on current combustion threshold value.If the quantity of event is greater than preset limit, substantially in the instruction of 54 places, then method 20 also can comprise the combustion threshold temperature increased enduringly through adjustment, is substantially indicated by frame 56, even if the increase of the use not order combustion threshold temperature of vehicle.If the quantity of event is less than preset limit, substantially in the instruction of 58 places, then once vehicle determination oxidation catalyzer is in the temperature of the combustion threshold limit be equal to or greater than through adjustment, substantially indicated by frame 30, then vehicle restarts hydrocarbon to be injected into waste gas streams, substantially indicated by frame 32, and this process is repeated.
Although carried out detailed description to execution better model of the present invention, those skilled in the art can learn that being used in the scope of appended claim implements many replacement design and implementation examples of the present invention.

Claims (10)

1. operate a method for vehicle, the method comprises:
Follow the trail of the use of oxidation catalyzer;
The tracked use of oxidation catalyzer and temperature drift value are set up and contacts;
Current combustion threshold temperature is adjusted by temperature drift value, to define the combustion threshold temperature through adjustment, wherein current combustion threshold temperature is greater than the initiation temperature of oxidation catalyzer, and wherein the initiation temperature of catalyst converter is the minimum temperature that oxidation catalyzer and waste gas reaction must reach; With
When the temperature of oxidation catalyzer is equal to or greater than the combustion threshold temperature through adjustment, hydrocarbon is injected waste gas streams, regenerates to make oxidation catalyzer.
2. the method for claim 1, also comprises and carries out sensing to the temperature of waste gas streams, to determine whether the temperature of waste gas streams is equal to or greater than the combustion threshold temperature through adjustment.
3. method as claimed in claim 2, wherein, carries out sensing to the temperature of waste gas streams and comprises and carry out sensing to the temperature of the waste gas streams of oxidation catalyzer upstream and carry out sensing to the temperature of the waste gas streams in oxidation catalyzer downstream.
4. the method for claim 1, also comprises detection oxidation catalyzer and when extinguishes.
5. method as claimed in claim 4, wherein, when detection oxidation catalyzer extinguishes to comprise identifies when the temperature of oxidation catalyzer falls under the combustion threshold temperature of adjustment.
6. method as claimed in claim 5, also comprises when oxidation catalyzer extinguishes, stops hydrocarbon being injected in waste gas streams.
7. method as claimed in claim 4, also comprises by the combustion threshold temperature through adjustment compared with maximum combustion threshold temperature, to determine whether the combustion threshold temperature through adjustment is less than or equal to maximum combustion threshold temperature.
8. method as claimed in claim 7, also comprises when oxidation catalyzer extinguishes, and increases the combustion threshold temperature through adjustment provisionally, to complete the regeneration of oxidation catalyzer.
9. method as claimed in claim 7, also comprises and follows the trail of the quantity that oxidation catalyzer is determined to be in the event of the combustion threshold temperature extinguishing through adjustment.
10. method as claimed in claim 9, also comprises when the quantity of described event is greater than preset limit, increases the combustion threshold temperature through adjustment enduringly.
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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180023491A1 (en) * 2015-02-25 2018-01-25 Carrier Corporation Air control valve for transportation refrigeration system
GB2561569B (en) * 2017-04-18 2019-06-19 Delphi Automotive Systems Lux Method to operate a NOx catalyser
CN115045741B (en) * 2021-03-09 2023-07-25 北京福田康明斯发动机有限公司 DOC sulfur poisoning diagnosis method, electronic device, vehicle, and storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261230A (en) * 1991-08-02 1993-11-16 Toyota Jidosha Kabushiki Kaisha Device for controlling heating of catalyst for purifying exhaust gas
US5787705A (en) * 1996-08-30 1998-08-04 General Motors Corporation Catalyst diagnostic
US7121085B2 (en) * 2001-09-04 2006-10-17 Ford Global Technologies, Llc Method and apparatus for controlling hydrocarbon injection into engine exhaust to reduce NOx

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5201802A (en) * 1991-02-04 1993-04-13 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification system for an internal combustion engine
DE4211092A1 (en) * 1992-04-03 1993-10-07 Bosch Gmbh Robert Method and device for assessing the functionality of a catalytic converter
US5419122A (en) * 1993-10-04 1995-05-30 Ford Motor Company Detection of catalytic converter operability by light-off time determination
US5857163A (en) * 1995-12-12 1999-01-05 General Motors Corporation Adaptive engine control responsive to catalyst deterioration estimation
US5706652A (en) * 1996-04-22 1998-01-13 General Motors Corporation Catalytic converter monitor method and apparatus
JPH1071325A (en) * 1996-06-21 1998-03-17 Ngk Insulators Ltd Method for controlling engine exhaust gas system and method for detecting deterioration in catalyst/ adsorption means
JPH1047048A (en) * 1996-08-02 1998-02-17 Toyota Motor Corp Emission control device for internal combustion engine
US6523341B1 (en) * 2000-01-07 2003-02-25 Ford Global Technologies, Inc. Cold start vehicle catalyst monitor
DE10323247A1 (en) * 2003-05-22 2004-12-09 Umicore Ag & Co.Kg Method for operating a drive system from a diesel engine with a diesel oxidation catalyst for exhaust gas purification
JP2005009370A (en) * 2003-06-18 2005-01-13 Toyota Industries Corp Catalyst degradation suppression control device for internal combustion engine
EP1633959B1 (en) * 2003-06-18 2007-05-09 Johnson Matthey Public Limited Company Methods of controlling reductant addition
CN101054918B (en) * 2006-04-12 2010-06-23 通用汽车环球科技运作公司 Diesel engine oxidation catalyzer (DOC) temperature-sensor rationality diagnosis
EP1873367B1 (en) * 2006-06-26 2008-12-24 Ford Global Technologies, LLC Method for operating a combustion engine having a four-way catalyst
JP2008274835A (en) * 2007-04-27 2008-11-13 Mitsubishi Fuso Truck & Bus Corp Deterioration diagnosis device for oxidation catalyst
CN101519994A (en) * 2008-05-07 2009-09-02 贵州黄帝车辆净化器有限公司 Independent active regeneration DPF (Diesel Particulate Filter) system and independent regeneration method
DE102008033154A1 (en) * 2008-07-15 2010-01-21 Friedrich Boysen Gmbh & Co. Kg regeneration device
GB2472986B (en) * 2009-08-24 2016-09-07 Gm Global Tech Operations Llc Method and apparatus for monitoring the light-off temperature of a diesel oxidation catalyst
KR101048144B1 (en) * 2009-11-02 2011-07-08 기아자동차주식회사 Exhaust system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261230A (en) * 1991-08-02 1993-11-16 Toyota Jidosha Kabushiki Kaisha Device for controlling heating of catalyst for purifying exhaust gas
US5787705A (en) * 1996-08-30 1998-08-04 General Motors Corporation Catalyst diagnostic
US7121085B2 (en) * 2001-09-04 2006-10-17 Ford Global Technologies, Llc Method and apparatus for controlling hydrocarbon injection into engine exhaust to reduce NOx

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