CN101424207B - Method of fuel economy - Google Patents
Method of fuel economy Download PDFInfo
- Publication number
- CN101424207B CN101424207B CN2008101746470A CN200810174647A CN101424207B CN 101424207 B CN101424207 B CN 101424207B CN 2008101746470 A CN2008101746470 A CN 2008101746470A CN 200810174647 A CN200810174647 A CN 200810174647A CN 101424207 B CN101424207 B CN 101424207B
- Authority
- CN
- China
- Prior art keywords
- treatment device
- exhaust gas
- gas post
- warming
- period
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- F02D41/0255—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 to accelerate the warming-up of the exhaust gas treating apparatus at engine start
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
- F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
- F02D41/0035—Controlling the purging of the canister as a function of the engine operating conditions to achieve a special effect, e.g. to warm up the catalyst
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- 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
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- 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
- F02D41/30—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
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- 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 a method for reducing the fuel usage, provides a method for reducing the fuel usage of a motor vehicle during warming-up period, wherein the motor vehicle being connected with an exhaust after treatment device so as to receive exhaust gas from an internal combustion engine. The method comprises steps of determining if the engine/catalyst requires warming-up; using additional fuel during the warming-up period when the exhaust after treatment device requiring warm-up; and increasing a volume of the additional fuel to warm up the exhaust after treatment device, the increase of fuel being based on the accumulated usage of the exhaust after treatment device during the warming-up period.
Description
Technical field
The present invention relates to have the motor vehicle of explosive motor, particularly have the motor vehicle of the motor of band exhaust gas post-treatment device.
Background technique
Known to using exhaust gas post-treatment device, such as the catalytic converter that is loaded in the vent systems, may command is from the exhaust emissions of explosive motor.
The operational efficiency of catalyzer depends on temperature, and catalyzer need reach minimum temperature (initiation temperature/light-off temperature) before effective conversion generation of exhaust.This minimum temperature depends on many factors but is in usually between 350 to 400 degrees centigrade of zones.Therefore behind the warm-up period engine cold-start, will be lower than this minimum temperature one section finite time inner catalyst temperature.The exhaust hydrocarbon discharging of discharging motor at this warm-up period is high, therefore need catalyzer be heated to minimum effective running temperature as early as possible.
In order to improve catalyst temperature rapidly; Knownly can provide more fuel to motor through apply extra load to motor, it can be for example fills battery or other energy storing devices again can (it also can improve the temperature from the exhaust that motor flows out), through increase in engine idle to artificial high level or the example at DENG the burn cycle later stage through the step burner oil that often is called delayed injection or back and sprays to DENG.Usually use method for the gasoline spark ignition engine with respect to maximum braking torque (MBT) retarded spark timing.
Another selection is first direct fuel injection or directly fuels injection into exhaust gas post-treatment device itself, the temperature of its burning and lifting exhaust gas post-treatment device.
Though all these selections will cause the rapid heating of exhaust gas post-treatment device, they all are the operating conditionss of poor efficiency, because fuel consumption in vehicles will be very high under this operating mode.
Be emission compliance; The emission level that need guarantee vehicle suits in the whole life time of vehicle; Therefore the amount of normally used additional fuel is based on aging catalyzer; It is illustrated in the postrun catalyst condition that prolongs vehicle, even so that also can guarantee the rapid heating of catalyzer during near its life time terminal point when catalyzer.
Than catalyzer aging in vehicle operating, new catalyzer needs energy still less to reach minimum catalyst temperature.Even owing to this fact and for guaranteeing the demand of catalyzer rapid heating when catalyst ageing; Common practice is to set the worst case that the amount of additional fuel is suitable for aging catalyst; This causes will using than the more fuel of actual demand when being new or new relatively when catalyzer, will produce extra fuel consumption at the initial stage of vehicle life time thus.
Summary of the invention
The objective of the invention is the fuel consumption of vehicle is minimized, particularly the engine warm-up in the whole life time of vehicle is in the phase.
According to a first aspect of the invention; A kind of method that reduces motor vehicle at the fuel of warming up period use is provided; Motor vehicle are connected with exhaust gas post-treatment device so that receive exhaust from explosive motor; This method comprises and need to determine whether the thermal exhaust after-treatment device; And have only when needing the thermal exhaust after-treatment device at warming up period and use extra fuel quantity, and use or consumption is increased in extra fuel quantity that warming up period uses with the thermal exhaust after-treatment device based on the accumulative total of exhaust gas post-treatment device.
This method can further comprise the value of the accumulative total consumption of storage indication exhaust gas post-treatment device, and the value that reads storage is to confirm the accumulative total consumption.
The accumulative total consumption can be the measured value of the total travel distance of motor vehicle after exhaust gas post-treatment device is installed on motor vehicle.
The accumulative total consumption can be the measured value that is installed on total hour number of motor vehicle rear engine operation from exhaust gas post-treatment device.
The accumulative total consumption can be from exhaust gas post-treatment device and is installed on the measured value that motor vehicle final vacuum after-treatment device is being higher than the total hour number that has moved under the situation of predetermined temperature.
Be increased in the fuel quantity that warming up period uses based on the accumulative total consumption of exhaust gas post-treatment device and comprise the post-injection fuel amount that warming up period is fed to motor that is increased in the thermal exhaust after-treatment device.
Post-injection fuel amount in the warming up period supply can increase and increase along with the accumulative total consumption.
Increase and may further include at least one that changes in fuel injection timing and the back injection quantity.
Be increased in fuel quantity that warming up period uses based on the accumulative total consumption of exhaust gas post-treatment device and comprise alternatively that with the thermal exhaust after-treatment device being increased in warming up period based on the accumulative total consumption is applied to additional load on the motor to increase firing rate.
The present invention will describe with reference to accompanying drawing through example.
Description of drawings
Fig. 1 is the schematic representation with motor vehicle of DENG according to an embodiment of the invention.
Fig. 2 is a flow chart of having showed method according to an embodiment of the invention.
Embodiment
With reference to figure 1, motor vehicle 5 have been showed with DENG 10.DENG 10 has the exhaust gas post-treatment device that outlet pipe 15 supplies exhaust to flow to oxidation catalyst 20 forms (appearance) from motor 10.
Controller 30 is connected in motor 10, and can operate the supply of fuel that is used to control motor 10.Controller 30 comprises microprocessing unit 34 and non-volatile memory device 36, has in the non-volatile memory device 36 to be used for the look-up table (look up table) that thermal exhaust after-treatment device 20 required post-injection fuels are associated after exhaust gas post-treatment device 20 consumptions and motor 10 started.
The wheel 6 of motor vehicle 5 is equipped with gear 7 and feeds back to controller 30 with gear 7 relevant sensors 8 to provide, and it can be used for the operating range of computer motor vehicle 5.Controller 30 can be operated the accumulative total operating range value that is used for receiving from sensor 8 signal and memory machine motor vehicle 5, and this value is used as the value of total consumption of indication exhaust gas post-treatment device 20.
Alternatively, controller 30 can comprise clock, and microprocessor 34 can operate the value of the accumulative total hours run that is used to calculate and store motor 10, and this value can be used as the value of total consumption of indication exhaust gas post-treatment device 20 and uses.
In another alternative; But the serviceability temperature sensor provides in the indication exhaust gas post-treatment device 20 or the value of the temperature before getting into exhaust gas post-treatment device 20; And controller 30 can operate and be used to calculate and store the value that said temperature is higher than the Cumulative time of predetermined temperature, and this time storing value can be used as the value of total consumption of indication exhaust gas post-treatment device 20 and uses.
Controller 30 is arranged for from can be used for need determining whether the temperature transducer (not shown) of thermal exhaust after-treatment device 20 to receive the temperature input.The temperature that this temperature transducer can be measured exhaust gas post-treatment device 20 maybe can be measured the temperature related with motor 10, for example coolant temperature.Should be appreciated that; If motor 10 reaches or near ambient temperature, probably need the thermal exhaust after-treatment device, if but motor 10 reaches or near its normal operating temperature; Very possible exhaust gas post-treatment device 20 is also warmmer relatively, so unlikely need extra heating.For example; Be equipped with start-example of the motor (for example employed in micro-hybrid and the hybrid moto vehicle) that stops to control in; Motor frequently stops and starting with fuel saving, if exhaust gas post-treatment device 20 still heat do not hope that all wasting fuel when each motor 10 restarts comes thermal exhaust after-treatment device 20.
Can operate the temperature input that is used at first through receiving and need to determine whether thermal exhaust after-treatment device 20 when motor 10 starts back controller 30 from motor 10 or exhaust gas post-treatment device 20.
If do not need thermal exhaust after-treatment device 20, then subsequently controller 30 can operate be used for normally for DENG 10 fuel supplying to obtain maximum fuel economy and minimum discharging based on the demand that adds on it.
The thermal exhaust after-treatment device 20 if desired, and then controller 30 can be operated and is used for extra fuel supply diesel generator 10 to come thermal exhaust after-treatment device 20 through post fuel injection being injected motor 10 subsequently.The back injection of this fuel can be several fuel injections that single fuel sprays or can be same amount or different amounts.
Back injected fuel amount is confirmed through at first reading the accumulative total that is installed on motor vehicle 5 motor vehicle from exhaust gas post-treatment device 20 mileage of going by controller 30, and is used this accumulation of miles value to establish the warming-up correction factor through the look-up table that is stored in the nonvolatile memory 36 subsequently.
Controller 30 uses this warming-up correction factor to confirm back injected fuel amount, and this factor also can be used for changing the fuel injection timing or sprays quantity.
For example, if if correction factor is 1.1, then will spraying than required fuel under new exhaust gas post-treatment device 20 situation, the fuel that needs to spray a unit quantity for new exhaust gas post-treatment device 20 Duos 10% fuel.Like this, the post-injection fuel amount of new exhaust gas post-treatment device 20 can be optimized to the minimum value that possibly obtain rapid warming-up, but aging along with exhaust gas post-treatment device 20, the post-injection fuel amount increases so that keep the warming-up performance does not gradually waste fuel.
With reference to figure 2, shown according to a kind of method of the present invention.
This method starts from step 100, and it is " connecting (key-on) " incident.This method advances to step 110 subsequently, need to determine whether thermal exhaust after-treatment device 20 here.As preceding mentioned, this can confirm through the temperature of measuring exhaust gas post-treatment device 20 or the temperature of measuring motor 10.
If do not need heating, then this method marches to step 200, and here method finishes, and does not use post fuel injection to penetrate.
If yet need to confirm thermal exhaust after-treatment device 20 in step 110, this method advances to step 120, reads the value of exhaust gas post-treatment device 20 accumulative total consumptions here from storage.The value of exhaust gas post-treatment device 20 accumulative total is the total travel mileage in this example, but as before mentioned, total hour number that this value has also alternately been moved for motor 10 or motor 10 are being higher than the total hour number that has moved under the predetermined temperature.
This method advances to step 130 subsequently, confirms to be used for the correction factor of back injected fuel amount here from the look-up table of storage.Look-up table is set up through using similar motor and the exhaust gas post-treatment device work of experimentizing, and when manufacture controller 30, this kind relation is stored in the storage.
This method advances to step 140 subsequently, and here motor 10 starts, the fuel supply of controller 30 control motors, and the post-injection fuel that not only provides normal combustion fuel to supply with but also be provided for thermal exhaust after-treatment device 20 is supplied with.The post-injection fuel amount is based on the correction factor of setting up in the step 130, and the post-injection fuel amount increases along with the aging of exhaust gas post-treatment device 20 generally.The back injection of fuel can continue to be sprayed until required fuel quantity, and injection end subsequently, controller 30 transfer the normal fuel that motor 10 only is provided as required to and supply with to satisfy and add demand on it.
In step 150, upgrade accumulative total consumption storage subsequently.This takes place sustainably, or can be used as the part generation of motor 10 shutdown procedures.At last, this method marches to step 200 end.Step 200 can be corresponding to " cutting off (key-off) " incident.
Another selection is that motor is applied additional load, needs more fuel to satisfy normal demand like this.This can pass through, and for example inserts such as the electrical load realization that is used for the generator of electrical storage device charging, or realizes through implementing mechanical brake.Load all can increase along with the aging of exhaust gas post-treatment device so that the fuel of increasing supply along with the increase of accumulative total consumption in any in two kinds of examples.
Though aforesaid exhaust gas post-treatment device is an oxidation catalyst, should be appreciated that the present invention also be applicable to the heating other any kinds must come to be heated to rapidly the exhaust gas post-treatment device of minimum temperature to the fuel quantity of motor through increasing supply at warming up period.
The technician in present technique field it will be appreciated that; Though the present invention is described through example with reference to one or more embodiments; The invention is not restricted to the disclosed embodiments; And can do a place or many places for disclosed embodiment and revise, or the embodiment that substitutes of structure and do not deviate from scope of the present invention.
Claims (10)
1. method that reduces the fuel that motor vehicle use at warming up period; Said motor vehicle are connected with exhaust gas post-treatment device so that receive exhaust from explosive motor; This method comprises and determines whether the said exhaust gas post-treatment device of needs heating; And have only when needing the said exhaust gas post-treatment device of heating and use extra fuel quantity, and be increased in extra fuel quantity that warming up period uses to heat said exhaust gas post-treatment device based on the accumulative total consumption of said exhaust gas post-treatment device at warming up period.
2. method according to claim 1 is characterized in that, said method further comprises the value of the accumulative total consumption of the said exhaust gas post-treatment device of storage indication, and the value that reads said storage is to confirm said accumulative total consumption.
3. method according to claim 1 and 2 is characterized in that, the accumulative total consumption is the measured value of the total travel distance of said motor vehicle after said exhaust gas post-treatment device is installed on said motor vehicle.
4. method according to claim 1 and 2 is characterized in that, the accumulative total consumption is the measured value of total hour number of said motor operation after said exhaust gas post-treatment device is installed on said motor vehicle.
5. method according to claim 1 and 2 is characterized in that, the accumulative total consumption is being higher than the measured value of the total hour number that has moved under the situation of predetermined temperature for said exhaust gas post-treatment device after said exhaust gas post-treatment device is installed on said motor vehicle.
6. method according to claim 1; It is characterized in that, be increased in the extra fuel quantity that warming up period uses based on the accumulative total consumption of said exhaust gas post-treatment device and comprise the post-injection fuel amount that warming up period is fed to said motor that is increased in to heat said exhaust gas post-treatment device.
7. method according to claim 6 is characterized in that, in the post-injection fuel amount of warming up period supply along with said accumulative total consumption increases and increases.
8. according to claim 6 or 7 described methods, it is characterized in that, increase at least one that further comprises in change fuel injection timing and the back injection quantity.
9. method according to claim 1; It is characterized in that, be increased in extra fuel quantity that warming up period uses based on the accumulative total consumption of said exhaust gas post-treatment device and comprise that to heat said exhaust gas post-treatment device being increased in warming up period based on said accumulative total consumption is applied to additional load on the said motor to increase firing rate.
10. the method for the fuel that uses at the warming up period motor vehicle of explosive motor of a minimizing; Said explosive motor is connected with exhaust gas post-treatment device so that receive exhaust from said motor; Said method comprises and determines whether the said exhaust gas post-treatment device of needs heating; And have only when needing the said exhaust gas post-treatment device of heating and use extra fuel quantity, and be increased in extra fuel quantity that warming up period uses to heat said exhaust gas post-treatment device based on the accumulative total consumption of said exhaust gas post-treatment device at warming up period.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0721299.6 | 2007-10-31 | ||
| GBGB0721299.6A GB0721299D0 (en) | 2007-10-31 | 2007-10-31 | A method for reducing fuel usage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101424207A CN101424207A (en) | 2009-05-06 |
| CN101424207B true CN101424207B (en) | 2012-03-28 |
Family
ID=38834535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101746470A Active CN101424207B (en) | 2007-10-31 | 2008-10-29 | Method of fuel economy |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101424207B (en) |
| GB (2) | GB0721299D0 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017203849A1 (en) * | 2017-03-08 | 2018-09-13 | Bayerische Motoren Werke Aktiengesellschaft | Control unit for adjusting the emission of a vehicle |
Family Cites Families (6)
| 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 |
| JP3584798B2 (en) * | 1999-09-03 | 2004-11-04 | トヨタ自動車株式会社 | Exhaust gas purification device for in-vehicle internal combustion engine |
| US6655130B1 (en) * | 2000-10-30 | 2003-12-02 | Delphi Technologies, Inc. | System and controls for near zero cold start tailpipe emissions in internal combustion engines |
| DE10210550A1 (en) * | 2002-03-09 | 2003-09-18 | Daimler Chrysler Ag | Operating system, for internal combustion engine with catalytic exhaust gas cleaning capacity, ensures adequate gas temperatures are maintained with minimal use of fuel |
| US7032572B2 (en) * | 2002-06-04 | 2006-04-25 | Ford Global Technologies, Llc | Method for controlling an engine to obtain rapid catalyst heating |
| DE10361287A1 (en) * | 2003-12-24 | 2005-07-21 | Siemens Ag | Nitrogen oxide storage system for motor vehicle with NOx-storage catalytic converter |
-
2007
- 2007-10-31 GB GBGB0721299.6A patent/GB0721299D0/en not_active Ceased
-
2008
- 2008-10-29 CN CN2008101746470A patent/CN101424207B/en active Active
- 2008-10-29 GB GB0819821A patent/GB2454346B8/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2454346A8 (en) | 2012-12-05 |
| GB2454346B8 (en) | 2012-12-05 |
| GB2454346A (en) | 2009-05-06 |
| GB0819821D0 (en) | 2008-12-03 |
| CN101424207A (en) | 2009-05-06 |
| GB0721299D0 (en) | 2007-12-12 |
| GB2454346B (en) | 2012-05-30 |
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