CN1434899A - Method for controlling fuel pump - Google Patents
Method for controlling fuel pump Download PDFInfo
- Publication number
- CN1434899A CN1434899A CN00819079A CN00819079A CN1434899A CN 1434899 A CN1434899 A CN 1434899A CN 00819079 A CN00819079 A CN 00819079A CN 00819079 A CN00819079 A CN 00819079A CN 1434899 A CN1434899 A CN 1434899A
- Authority
- CN
- China
- Prior art keywords
- fuel
- fuel pump
- combustion engine
- starting
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 claims abstract description 28
- 239000000295 fuel oil Substances 0.000 claims description 33
- 239000003921 oil Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000013178 mathematical model Methods 0.000 claims 2
- 230000037452 priming Effects 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Images
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
- F02D41/30—Controlling fuel injection
-
- 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
-
- 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
- F02D41/3082—Control of electrical fuel pumps
-
- 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
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
Abstract
The invention relates to a method for controlling a fuel pump (11), especially an electric fuel pump used in an internal combustion engine. According to the inventive method, a fuel pump priming is initiated before the internal combustion engine itself is started. During control of the fuel pump (11) the control device of the internal combustion engine takes into consideration the fuel volume required or the fuel volume required to replenish the volume of the fuel supply system or a corresponding fuel quantity or fuel mass and carries out a pump priming until the desired volume or the desired quantity or the desired mass that is determined depending on predetermined conditions has been delivered.
Description
Technical field
The present invention relates to method as the fuel pump of the controlling combustion engine of type as described in the independent claims.
Prior art
In the fuel supply system of internal-combustion engine, generally supply fuel oil by electric fuel punp.Controlling electric fuel punp or give by combustion engine control provides voltage.When engine starting, as long as fuel pump is moving, controller knows that just switch starter is operated.If internal-combustion engine starts and pump keeps on-state, and controller is thought and is perhaps had unallowed working state by internal-combustion engine off-duty still, then starts a safety switch, and it has stoped the fuel delivery when connecting igniting and internal-combustion engine stall.Thereby, guaranteed for example to interrupt the supply of fuel oil rapidly in the back that has an accident.
Owing to when engine starting, also need fuel oil that one sufficiently high pressure is arranged, therefore there is such fuel supply system, wherein carry out fuel pump starting in advance, wherein begin prestart at internal-combustion engine, oil fuel feed pump provides voltage.Starting type fuel supply system has in advance so for example been described in document EP 0 679220B1.
This known fuel supply system carries out the starting in advance of fuel pump; wherein the expection of internal-combustion engine starting is a normal starting; still first starting of filling fuel oil, or perhaps initial start-up or the starting after internal-combustion engine is shut down back or fuel supply system repairing for a long time, this still is different.As long as be considered to new filling, then the endurance of the starting in advance of fuel pump is longer than the time of general starting.
But, not only when normal starting, and, all need not carry too many fuel oil, for this reason, find out whether start very according to the different parameters of internal-combustion engine in that inoperative ground is first when filling.If not starting, just then the starting in advance of fuel pump is terminated by the corresponding control signal of coming self-controller.In known fuel supply system, the control time of electric fuel punp is selected as the standard of waiting to carry oil mass.If the control time is long more, then many more fuel oils are in advance being admitted in the starting at fuel pump.
Summary of the invention
Compare with known method, fuel pump controlling method of the present invention has such advantage, and promptly it is with the related standards of fuel oil volume as the control of control fuel pump.Therefore, compare, realized the further raising of validity,, guaranteed not need to carry too many fuel oil simultaneously here with the known fuel pump control of wherein carrying out the adjusting of the amount of fuel that in starting in advance, will carry according to time standard.
Obtained this advantage by fuel pump controlling method, predesignated a volume for the required amount of fuel of theory with claim 1 technical characteristics.
Obtained other advantage of the present invention by the given measure of dependent claims.Here, particularly advantageous is when first the filling, to know exactly and need fill how many fuel oils that this is because will fill the volume of oil-fired system or fuel oil pressure-accumulating tube exactly at all.
Also advantageously, when normal fuel pump starts, form the required amount of fuel of pressure in advance obviously be less than common system at prestart.If the idling of IC engine normal termination, then controller still correctly carries out all essential tasks, at next prestart, must advantageously only carry a small amount of fuel oil, so that just form pressure.Know dead time if reach " second " order of magnitude ground, then determine next prestarting amount of fuel as shutting down function ground.Therefore, the pressure that can advantageously consider the fuel supply system in the shutdown stage when fuel pump starts in advance reduces.By considering dead time, can advantageously coordinate the starting in advance of pump more accurately according to system requirements.
Can and consider the fuel oil compressibility and pressure-accumulating tube volumetric expansion and advantageously determine required fuel oil volume according to required precision.If necessary, can come the actual fed ability of calculating pump according to discharge pressure and back pressure.
In another design proposal of the present invention, as what measure the fuel pump control signal related parameter ground arranged, replace volume with required amount of fuel or fuel oil quality.
Description of drawings
The present invention shown in the drawings and the specification in the back are described in greater detail.
Fig. 1 represents to comprise the rough overview of fuel of internal combustion engine supply system of the main device of the present invention of testing state particularly, and such fuel supply system has been known from EP0679220B1.
Fig. 2 represents an embodiment of fuel pump controlling method of the present invention, and it can move in fuel supply system shown in Figure 1.
The specific descriptions of form of implementation
In the following description, will the present invention be described in conjunction with an embodiment who relates to the fuel of internal combustion engine supply system.But generally speaking, the present invention can expand to any method of coming control pump by microprocessor or controller, precondition is exactly, and microprocessor so carries out the control to the pump of carrying liquid, promptly considered liquid volume to be carried when control and controls according to volume.
In Fig. 1, schematically show the constituent element that is used for illustrating the fuel of internal combustion engine supply system that the fuel pump controlling method moved at Fig. 2 is required.Here, with 10 controllers of representing controller such as automobile.This controller comprises a microprocessor that sends fuel pump 11 control signals at least.Here, fuel pump 11 is that the control of electric fuel punp and this electric fuel punp is undertaken by electric fuel punp relay 12, and a terminal of relay 12 links to each other with battery tension terminal B+.Under the situation of the current circuit closure of electric fuel punp relay, battery tension UB+ just acts on the voltage terminal of electric fuel punp.Just schematically show fuel supply system 19 here.
Carry the information of sending by sensor or other measuring mechanism 13～18 for controller 10.Specified: the throttle valve sensor 13 of a measurement throttle valve angle α DK with establishing a capital the sensor that must have or measuring mechanism as differing, a speed probe 14 of measuring rotation speed n, an engine temperature sensing unit 17, outlet air temperature sensor 18 and any other sensor 15 and a voltage measurement mechanism 16, its is measured the voltage on terminal K1.15 and finds out thus whether ignition switch Z opens or closed.
The data that recorded by sensor or voltage measurement mechanism are transfused in the controller 10 and are used to control there or adjust internal-combustion engine, for example judge igniting and/or injection situation.By Out let A output control signal.In addition, controller 10 also carries one to be provided for the control signal of electric fuel punp relay 12 according to information of being carried or known running parameter on an Out let B, and it makes electric fuel punp 11 bear voltage U B+ or breaks away from this voltage.In controller 10 or unshowned microprocessor, also carry out time measurement, when forming the electric fuel oil pump control signal, need such time measurement.
Fig. 2 understands the particularly fuel pump controlling method of the present invention in fuel pump starts in advance specifically.,, can guarantee the injection fuel oil that in time provides abundant here by the in advance starting of fuel pump, this be initial start-up or starting has nothing to do next time.
Method of the present invention is from step S0.In step S1, connect igniting, check the operating conditions of terminal K1.15 in other words.For example can prove " igniting is connected " here, by the incident of inspection door contact or other representation feature.When finding the access failure igniting in step S1, then program comes to an end with step S2a.If in step S1, find out the igniting on, inquire earlier in step S2 then whether fuel pump moves according to the continuous service condition of pump, perhaps whether satisfies B-Ekpd (electric fuel punp is in continuous operating conditions) criterion.Such criterion for example is that the live axle from internal-combustion engine or motor rotates.
If carrying out operation continuously always, then up to knowing just that in step S1 igniting is no longer valid.And if known that in step S2 electric fuel punp moves no longer continuously, then in step S3, find out, whether need and allow fuel pump in advance starting so that before engine start, set up required fuel pressure (satisfying the electric fuel punp condition of starting in advance).If not, inquire again in step S1 then whether igniting connects.Can suppose that also fuel pump is moving and this method continuation execution in step S2 continuously.As the go ahead of the rest standard (satisfy electric fuel punp go ahead of the rest starting conditions) of start request of fuel pump, can use following parameter:
-motor and and then dead time of fuel pump,
The measurement of-oil-fired system or modelling pressure (if any),
-from the pump that has carried out of the last engine start number of times of starting in advance,
-controller is in the time or the accurate Minimum Idle Time of idle running.
These can as desired electric fuel punp in advance the parameter of the standard of starting anyway usually in combustion engine control and thereby need not to handle again bothersomely.
If finding out needs fuel pump starting in advance, find out in step S4 then whether this is first filling, the filling behind the promptly former emptying fuel supply system in step S3.Also can start first the filling by the shop test instrument.If relate to first filling really, then in step S5, fill maximum delivery oil mass value as the theoretical amount of fuel vkstsol ground that must carry with corresponding opinion opinion value VKSTEBF.
And if know that in step S4 this is not first filling; then in step S6, find out; whether know the accurate dead time of internal-combustion engine or downtime duration accurately; known dead time in case be accurate to second ground; then in step S7; to carry the theoretical value vkstsol of oil mass as function ground formation dead time, so that form in response to the pressure in the shutdown stage that can for example determine in the present invention.So following formula is set up:
Vkstsol=VKSTENL=f (dead time)
If know the pressure in the fuel supply system, then can know required quantity delivered from fuel oil compressibility and fuel supply system expansibility, wherein under the situation of known dead time, also can consider these factors simultaneously.
If in step S6, find, also do not know accurate dead time, and can't accurately know pressure, then also can determine the fuel oil volume that will carry by compressibility and pressure-accumulating tube volumetric expansion.Here hypothesis although filled system, does not also have pressure (external pressure).Then, in step S8, the theoretical fuel oil volume vkstsol value of being set at VKSTPVL that will in starting, carry in advance.
Can also be by so-called shop test instrument control fuel pump when filling fuel oil.This all is feasible at any time, as long as connection igniting (K1.15 connection) and fuel pump 11 need not rerun because of other, in other words when not having the continuous operation of fuel pump 11.So main point pump oil absorption vkstsol is as the value of being set to VKSTEBF among the step S5.This value can from the fuel oil volume deduct be used for normal pump in advance starting delivered volume and obtain.When resetting, igniting one is connected, and just carries out the starting in advance of normal pump immediately.
Described step in Fig. 2 flow process is led to a theoretical fuel oil volume that in advance be transferred in the starting at fuel pump respectively, so that guarantee that according to existence conditions the best of internal-combustion engine starts.In step S9, find out and carry fuel oil volume VKST whether also less than theoretical value vkstsol.If be not less than, then begin with step S1 again and check and whether connect igniting.Perhaps, also can proceed and check whether fuel pump 11 is in continuous operation with step S2.
If know delivered volume vkst less than theoretical volume vkstsol in step S9, then fuel pump 11 is worked as required always or is controlled, till reaching reality effectively will carry the fuel oil volume threshold (step S10 and S9).In step S10, check that condition B-ekpol=is true here,
In addition, in first the filling, the amount of fuel vkst that has carried can be determined by the constant conveying capacity of hypothesis by a naive model.For copying physical condition better, can with most important influence factor such as cell voltage and with the system pressure of revolution speed and modelling or measurement extended model relatively.Also can expend corresponding one-tenth this locality and determine to carry oil mass, perhaps measure the conveying oil mass by a sensor by the fuel pump electric power.
After in advance starting is carried out, carry out the transition to general fuel pump control, at fuel pump as long as controller recognizes internal-combustion engine and should continue to keep moving.
In the embodiment of Fig. 2, the related standards of fuel oil volume as fuel pump control.Replace volume to calculate ground, whole calculating also can be carried out with amount of fuel or fuel oil quality relevantly.So bulking value embodiment illustrated in fig. 2 can replace with corresponding quantitative value or magnitude simply.
Claims (12)
1. the method for a fuel pump that is used for controlling combustion engine, it comes work by a controller, wherein the control of this fuel pump is to carry out under the situation of having considered the internal combustion engine state, it is characterized in that the control of fuel pump (11) is to carry out with the fuel oil theoretical value (vkstsol) that will carry that volume is determined relevantly according to one.
2. one kind is used for controlling combustion engine with the method for fuel pump, it comes work by a controller, wherein the control of this fuel pump is to carry out under the situation of having considered the internal combustion engine state, it is characterized in that the control of fuel pump (11) is to determine that with fuel amount or fuel oil quality the fuel oil theoretical value that will carry carries out according to one relevantly.
3. according to the fuel pump controlling method of claim 1 or 2, it is characterized in that, in the control of fuel pump (11), is the new filling of fuel supply system (19), and still normal the filling will be treated with a certain discrimination.
4. according to the fuel pump controlling method of one of aforesaid right requirement, it is characterized in that carry out the starting in advance of such fuel pump (11), promptly it carries out before internal-combustion engine starts.
5. according to the fuel pump controlling method of one of aforesaid right requirement, it is characterized in that the connection of fuel pump (11) realizes by identification starting hope.
6. according to the fuel pump controlling method of claim 5, it is characterized in that the connection of fuel pump (11) is to carry out by the signal on the analysis terminal (K1.15) or by analyzing " door starts " or similar information.
7. the fuel pump controlling method that one of requires according to aforesaid right; it is characterized in that; when determining to wait to carry fuel oil volume (vkstsol) or waiting to carry fuel amount or fuel oil quality, considered internal-combustion engine and and then dead time of fuel pump (11) and/or record or modeled oil-fired system pressure and/or the pump that carried out from last the starting number of times of starting and/or the time that controller (10) is in the idle running process in advance.
8. according to the fuel pump controlling method of one of aforesaid right requirement, it is characterized in that the control of fuel pump (11) requires the first shop test instrument of filling of fuel oil to carry out by one.
9. the fuel pump controlling method that one of requires according to aforesaid right, it is characterized in that, stipulate that according to known condition certain treats delivered volume or fuel amount or fuel oil quality that certain is to be carried, and fuel pump keeps starting state in advance always, up to having carried this quantity, or up to receiving interrupt request, or carry out the transition to proper functioning up to fuel pump (11).
10. according to the fuel pump controlling method of one of aforesaid right requirement, it is characterized in that, considering to suppose under the situation of constant conveying capacity, determine the amount of fuel of having carried by a mathematical model.
11. fuel pump controlling method according to claim 10, it is characterized in that, the system pressure of replenishing one of them influence factor at least such as cell voltage (UB+), revolution speed, modelling or record for this mathematical model is perhaps determined the conveying oil mass by the fuel pump electric power or is measured by self a sensor.
12. a FPC Fuel Pump Controller is characterized in that, this device comprises a controller (10) that has a microprocessor, and this microprocessor is carried out and carried out the program step required according to the method for one of front claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19961298A DE19961298A1 (en) | 1999-12-18 | 1999-12-18 | Method for controlling a fuel pump |
| DE19961298.6 | 1999-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1434899A true CN1434899A (en) | 2003-08-06 |
Family
ID=7933312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00819079A Pending CN1434899A (en) | 1999-12-18 | 2000-12-05 | Method for controlling fuel pump |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1242730A2 (en) |
| JP (1) | JP2003517135A (en) |
| KR (1) | KR20020072552A (en) |
| CN (1) | CN1434899A (en) |
| DE (1) | DE19961298A1 (en) |
| WO (1) | WO2001044637A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430587C (en) * | 2003-09-22 | 2008-11-05 | 五十铃自动车株式会社 | Diesel engine |
| CN102116206A (en) * | 2009-12-31 | 2011-07-06 | 十堰科纳汽车电器有限公司 | Oil pump controller and control method thereof |
| CN102797576A (en) * | 2012-08-09 | 2012-11-28 | 中国南方航空工业(集团)有限公司 | Method and device for controlling oil filling during startup of piston engine |
| CN104514651A (en) * | 2013-09-29 | 2015-04-15 | 联合汽车电子有限公司 | Multi-gear fuel pump control system and implementation method |
| CN106150722A (en) * | 2015-05-14 | 2016-11-23 | 福特环球技术公司 | For supplying fuel to the method and system of electromotor |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148646A1 (en) * | 2001-10-02 | 2003-04-10 | Bosch Gmbh Robert | Internal combustion engine controller has switch that drives fuel pump independently of main processor during main processor initializing process |
| DE10151513A1 (en) | 2001-10-18 | 2003-05-22 | Bosch Gmbh Robert | Method, computer program, control and regulating device for operating an internal combustion engine, and internal combustion engine |
| DE10160311C2 (en) * | 2001-12-07 | 2003-11-20 | Bosch Gmbh Robert | Method, computer program, control and regulating device for operating an internal combustion engine and internal combustion engine |
| FR2864163B1 (en) * | 2003-12-18 | 2006-02-10 | Renault Sas | METHOD FOR STARTING A FUEL PUMP |
| JP4297129B2 (en) | 2006-04-12 | 2009-07-15 | トヨタ自動車株式会社 | Start control device for internal combustion engine |
| DE102007011018A1 (en) * | 2007-03-07 | 2008-09-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for operating a fuel pump |
| DE102010027839A1 (en) * | 2010-04-16 | 2011-10-20 | Robert Bosch Gmbh | pump assembly |
| DE102010028010A1 (en) * | 2010-04-21 | 2011-10-27 | Robert Bosch Gmbh | Method for operating a fuel delivery device |
| US9835102B2 (en) | 2014-11-14 | 2017-12-05 | Hyundai Motor Company | Method for controlling vehicle fuel pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT380540B (en) * | 1982-02-12 | 1986-06-10 | Steyr Daimler Puch Ag | FUEL INJECTION SYSTEM FOR AN ELECTRICAL ENGINE, INCLUDING A STARTER LOCK, WITH DIESEL ENGINES |
| JP2845005B2 (en) * | 1992-02-07 | 1999-01-13 | トヨタ自動車株式会社 | Fuel pump control device |
| DE4335891A1 (en) * | 1993-10-21 | 1995-04-27 | Bosch Gmbh Robert | Method for filling the fuel supply system in an internal combustion engine |
| FR2711734B1 (en) * | 1993-10-29 | 1995-11-24 | Renault | Method of controlling an internal combustion engine fuel pump. |
| DE4401083A1 (en) * | 1994-01-15 | 1995-07-20 | Daimler Benz Ag | Fuel injection unit for IC engine |
| DE4443879B4 (en) * | 1994-12-09 | 2006-12-14 | Robert Bosch Gmbh | Device and method for supplying fuel to an internal combustion engine |
-
1999
- 1999-12-18 DE DE19961298A patent/DE19961298A1/en not_active Withdrawn
-
2000
- 2000-12-05 KR KR1020027007737A patent/KR20020072552A/en not_active Application Discontinuation
- 2000-12-05 EP EP00993427A patent/EP1242730A2/en not_active Withdrawn
- 2000-12-05 JP JP2001545703A patent/JP2003517135A/en active Pending
- 2000-12-05 CN CN00819079A patent/CN1434899A/en active Pending
- 2000-12-05 WO PCT/DE2000/004332 patent/WO2001044637A2/en not_active Application Discontinuation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430587C (en) * | 2003-09-22 | 2008-11-05 | 五十铃自动车株式会社 | Diesel engine |
| CN102116206A (en) * | 2009-12-31 | 2011-07-06 | 十堰科纳汽车电器有限公司 | Oil pump controller and control method thereof |
| CN102116206B (en) * | 2009-12-31 | 2013-09-11 | 十堰科纳汽车电器有限公司 | Oil pump controller and control method thereof |
| CN102797576A (en) * | 2012-08-09 | 2012-11-28 | 中国南方航空工业(集团)有限公司 | Method and device for controlling oil filling during startup of piston engine |
| CN104514651A (en) * | 2013-09-29 | 2015-04-15 | 联合汽车电子有限公司 | Multi-gear fuel pump control system and implementation method |
| CN104514651B (en) * | 2013-09-29 | 2018-05-11 | 联合汽车电子有限公司 | More gear fuel oil pump control systems and its implementation method |
| CN106150722A (en) * | 2015-05-14 | 2016-11-23 | 福特环球技术公司 | For supplying fuel to the method and system of electromotor |
| CN106150722B (en) * | 2015-05-14 | 2020-12-25 | 福特环球技术公司 | Method and system for supplying fuel to an engine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001044637A2 (en) | 2001-06-21 |
| JP2003517135A (en) | 2003-05-20 |
| KR20020072552A (en) | 2002-09-16 |
| WO2001044637A3 (en) | 2002-05-10 |
| EP1242730A2 (en) | 2002-09-25 |
| DE19961298A1 (en) | 2001-06-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |