CN103388544A - A method of operating a fuel system for an internal combustion engine - Google Patents
A method of operating a fuel system for an internal combustion engine Download PDFInfo
- Publication number
- CN103388544A CN103388544A CN2013101666157A CN201310166615A CN103388544A CN 103388544 A CN103388544 A CN 103388544A CN 2013101666157 A CN2013101666157 A CN 2013101666157A CN 201310166615 A CN201310166615 A CN 201310166615A CN 103388544 A CN103388544 A CN 103388544A
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- fuel
- transfer pump
- fuel system
- relay
- running state
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- 239000000446 fuel Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- 238000012546 transfer Methods 0.000 claims description 38
- 238000004590 computer program Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 9
- 230000000306 recurrent effect Effects 0.000 claims description 5
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000000737 periodic effect Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000012636 effector Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/10—Fluid working
- F04C2210/1044—Fuel
Abstract
There is provided a method of operating a fuel system (10) for an internal combustion engine described above, wherein the fuel system (10) comprises at least one electrically driven fuel pump (16), and wherein the electric fuel pump (16)) is switched to an operating voltage (48) in a pulse width modulation (59) manner by means of periodic pulse excitation of a relay (40). In this case, a duty ratio (60) of the pulse width modulation (59) is controlled and / or regulated in dependence on a quantity of fuel to be pumped (58).
Description
Technical field
This relates to a kind of method as described in the preamble according to claim 1, and according to control and/or controlling device and the computer program of claim arranged side by side.
Background technique
Be used for the fuel system of internal-combustion engine by market cicada, it comprises at least one electrically driven (operated) fuel transfer pump.Particularly, this be fuel system pre-oil feed pump, it is delivered to fuel the high-pressure service pump that is arranged in downstream.In known mode of execution, the unnecessary quantity delivered of electrically driven (operated) fuel transfer pump is transmitted back in fuel container by means of relief valve before fuel system.
Summary of the invention
Purpose of the present invention by according to claim 1 method and realize by the control according to claim side by side and/or controlling device and computer program.Favourable improvement project provides in the dependent claims.Be present in following explanation and accompanying drawing for the important feature of the present invention in addition, wherein said feature not only individually but also with the various combination form, for the present invention, may be important, no longer indicates this in detail at this.
Advantage of the present invention is, the transmission power of electrically driven (operated) fuel transfer pump that is used for the fuel system of internal-combustion engine can be controlled or regulate by means of the beat of relay.Particularly under failure condition, when fuel system is for example carried too high fuel quantity due to the measuring apparatus that damages or nipped relief valve, can controllably reduce the transmission power of electrically driven (operated) fuel transfer pump.Can improve generally the usability of internal-combustion engine thus, and not need the parts that add, for example assemble semi-conductive output stage, provide cost savings thus.
The present invention relates to a kind of fuel system for driving internal-combustion engine and using, wherein fuel system comprises at least one electrically driven (operated) fuel transfer pump.At this, " electricity fuel transfer pump " be interpreted as direct current generator and with the combination of the mechanical pump of its coupling.At this, electric fuel transfer pump is switched on operating voltage or earthing potential with the form of pulsewidth modulation by means of the relay recurrent pulses with exciting.Operating voltage is for example the voltage of Vehicular battery.Relay can be " standard relay " of relatively simple and cost economy, and it has usually existed and has been used for the electric wiring of fuel transfer pump is switched to operating voltage or earthing potential constantly during internal combustion engine operation.
The present invention is based in addition such fact, fuel transfer pump has machinery inertial, and other element of fuel system has hydraulic pressure inertia.Thus, if the beat of relay realize according to the make that it has relatively low frequency, and can not be only based on the inductance of fuel transfer pump, make electric current level and smooth, the transmission power that draws also can be relatively constant.Basically be in following situation according to fuel system of the present invention, whether fuel transfer pump can utilize respectively approximate " simulation " voltage to control.
Particularly proposed, the duty factor of pulsewidth modulation is controlled relatively and/or regulates with the fuel quantity that will carry.Thus, the transmission power of fuel transfer pump can controllably change in simple mode and on relatively wide speed range.This for example in the situation that the appliance computer program realize.This be need not usually the parts that add.
Proposed in addition, the frequency of pulsewidth modulation is 1 hertz to 100 hertz, preferred approximately 10 hertz.The order of magnitude is that the frequency of 10 hertz has illustrated a kind of particularly suitable compromise proposal, is used for being generally used for the standard relay of electrically driven (operated) fuel transfer pump.Should connect frequency on the one hand enough low, namely relay can be connected by interference-free.On the other hand, connect frequency enough high, in order to keep the fluctuation of the short time of transmission power littlely.
If with the average fuel pressure in high pressure accumulator (" rail "), control relatively and regulate duty factor, wherein fuel pressure is found out at least one cycle of pulsewidth modulation, and the present invention is particularly advantageous.The method according to this invention can be used for thus, with fuel pressure, is delivered to relatively the fuel quantity of the high-pressure service pump that is arranged in electrically driven (operated) fuel transfer pump downstream.On at least one cycle of pulsewidth modulation, fuel pressure is averaged and can realize stablizing especially and regulate accurately.Or at this, need not force the adjustable throttle valve of flow control valve of measuring apparatus, for example high-pressure service pump upstream.
A design proposal of this method proposes, and the fuel transfer pump of electricity is the pre-oil feed pump in fuel system.The transmission power of pre-oil feed pump is compared little with high-pressure service pump.Correspondingly, the electric power less of fuel transfer pump, thus it can be moved on pulse excitation ground especially well by means of relay.Usually, relay is cost economy and common device, is used for connecting electric fuel transfer pump.
Another kind of design proposal of the present invention proposes, in the first running state, the fuel transfer pump of electricity is switched on operating voltage by means of relay constantly, and in the second running state, the fuel transfer pump of electricity is switched on operating voltage with the form of pulsewidth modulation by means of the relay recurrent pulses with exciting.The first running state preferably fuel system commonly used, namely be set as trouble-free operation.Be not pulse excitation ground at this relay, thereby electric fuel transfer pump is carried constantly.The machinery of relay and electric fatigue intensity are corresponding larger thus.By other device, the fuel quantity of effective conveying is adjusted in this running state.
On the contrary, the second running state is the urgent running state of fuel system, and wherein fuel system, device (measuring apparatus, flow control valve, relief valve) control the described fuel quantity that will carry in the first running state basically no longer or can not control the described fuel quantity that will carry again.However, based on the present invention, can further move fuel system or internal-combustion engine.Simultaneously can or to automobile driver, send alarm signal to the operator of internal-combustion engine, for example can make thus Motor Vehicle go home or can arrive workshop.Therefore usually, need not the short time cuts off internal-combustion engine and therefore may continue to travel.
Be contemplated that, the method according to this invention is also carried out in the first running state.Draw thus relatively large cost advantage, this is because measuring apparatus or flow control valve are owing to being unnecessary according to the present invention to the adjustment of pre-oil feed pump.In the case, relay should have corresponding machinery and electric fatigue intensity.
This method can be especially simple and cost carry out by means of the control and/or the controlling device that are used for internal-combustion engine economically, preferably in the situation that the appliance computer program carry out.Additional parts are normally unnecessary at this, can save cost thus.
Description of drawings
Set forth with reference to the accompanying drawings exemplary mode of execution of the present invention.There is shown:
Fig. 1 shows the schematic diagram for the fuel system of internal-combustion engine;
Fig. 2 shows the very first time chart for the operation fuel transfer pump;
Fig. 3 shows the second time chart for the operation fuel transfer pump; With
Fig. 4 shows for the flow chart of operation according to the method for the fuel system of Fig. 1.
Applied identical reference character for functionally similar element and parameter in all figure and in different mode of executions.
Embodiment
Fig. 1 has illustrated the fuel system 10 that is used for (unshowned) internal-combustion engine with reduced graph.Fuel from fuel tank 12 via draw pipeline 14, by means of by direct current the pre-oil feed pump of electrically driven (operated) fuel transfer pump 16(), via low pressure line 18 and via can be by the flow control valve 22(" measuring apparatus (Zumesseinrichtung) " of electromagnetically-operated device 20 manipulations) be transported to high-pressure service pump, hereinafter referred to as reciprocating pump 24.Reciprocating pump 24 is connected to high pressure accumulator 28(" rail altogether " via pressure duct 26 in downstream) on.Be furnished with pressure transducer 29 on high pressure accumulator 28, it can find out the fuel pressure that exists in high pressure accumulator 28.The valve of other element, for example reciprocating pump 24 is not shown in Fig. 1.
Electromagnetically-operated device 20 is controlled by the control and/or the controlling device 30 that comprise data storage 32 and computer program 34.Make and control and/or controlling device 30 and flow control valve 22 or relay 40 or pressure transducer 29 are connected by electric lead 36 or 38 or 39.
Relay 40 comprises field coil 42, but it is by means of unshowned armature master cock contact 44.Field coil 42 utilizes a wiring to be connected on earthing potential 46 and utilizes another wiring to be connected on electric lead 38.Switch contact 44 utilizes a wiring to be connected on operating voltage 48 and utilizes another wiring to be connected in the first wiring 50 of fuel transfer pump 16.The second wiring 52 of fuel transfer pump 16 is currently connected on earthing potential 46.What have relay 40 between electric lead 38 and earthing potential 46 controls voltage 54, and has the pump voltage 56 of fuel transfer pump 16 between wiring 50 and 52.
In the suitable another kind of mode of execution of the unshowned function of fuel system 10, wiring 50 is connected with operating voltage 48 constantly, and the switch contact 44 of relay 40 is linked in electric lead between wiring 52 and earthing potential 46.In a kind of unshowned alternative mode of execution of flow control valve 22, flow control valve is designed to have the element of construction of reciprocating pump 24.But flow control valve 22 can be for example reciprocating pump 24 positive opening enter valve.
In service in fuel system 10, electrically driven (operated) fuel transfer pump 16 is transported to fuel low pressure line 18 from fuel tank 12.The fuel quantity that flows to the active chamber 25 of reciprocating pump 24 22 pairs of this flow control valves is controlled.Flow control valve 22 can be closed relatively and open with the corresponding demand of fuel.Fuel is for example gasoline or diesel oil.
Fuel pressure in high pressure accumulator 28 utilizes pressure transducer 29 to find out, and corresponding to the signal of fuel pressure, via circuit 39, is transferred to and controls and/or controlling device 30.Control and/or controlling device 30 is current programmes in the following manner: it forms Circuit tuning, in order to fuel pressure regulation, be rating value.Correspondingly control electromagnetically-operated device 20 in the first running state (" normal operation ") for this reason.
In the second running state (failure condition, for example Effector 20 is out of service due to electric lead 36 fractures), relay 40 recurrent pulses excite ground (getaktet) to be switched on operating voltage 48 in the mode (referring to Fig. 2) of pulsewidth modulation 59.At this at least one cycle 61(in pulsewidth modulation 59 referring to Fig. 2) on found out fuel pressure in high pressure accumulator 28.Circuit tuning is current to be comprised by means of electric components and/or the PID-regulator (PID means: ratio, integration, differential) carried out by means of computer program 34.
The frequency of pulsewidth modulation 59 is current in addition is approximately 10 hertz.Therefore switch contact 44 is with this frequency period closed and disconnected constantly.This draws average voltage or average current at the first wiring 50 places, and its duty factor 60(corresponding to pulsewidth modulation 59 is referring to Fig. 2) less than operating voltage 48 or the maximum operating currenbt of fuel transfer pump 16.
Fig. 2 shows the very first time chart for operation fuel transfer pump 16.Upper curve in the accompanying drawings represents the fuel delivery 58 of transit time t.Two lower curve in the drawings represent be used to the pulsewidth modulation 59 of controlling fuel transfer pump 16.Represent pump voltage 56 with the curve shown in wide lines, and represent the affiliated voltage 54 of controlling of relay 40 with the curve shown in hachure.Pulsewidth modulation 59 has duty factor 60 and cycle 61 as mentioned above.
Controlling voltage 54 illustrates about time t and corresponding amplitude with relative thick quantification in the accompanying drawings with pump voltage 56.Be actually " simulation " voltage.Pump voltage 56 rises to corresponding maximum value steeply in each pulse, it is roughly corresponding to operating voltage 48.After corresponding end-of-pulsing, pump voltage 56 roughly descends rapidly corresponding to exponential function, and until each pulse subsequently starts almost to be reduced to zero.Due to the frequency less of pulsewidth modulation 59, the beat that therefore can obviously find out pump voltage 56 is clock pulse (Taktung) in other words.
Can find out, although 10 hertz frequency less of pulsewidth modulation 59 have drawn the fuel delivery 58 of substantial constant on time t.Due to the machinery inertial of fuel transfer pump 16 and the hydraulic pressure inertia of fuel system 10, therefore above-mentioned situation is possible especially generally.Can find out, mild corresponding to the curve of fuel delivery 58.At this, fuel delivery 58 is roughly percent 20 of possible full quantity delivered.
Fig. 3 shows the second time chart for operation fuel transfer pump 16.Lower curve in the accompanying drawings represents the duty factor 60 of pump voltage 56.Reduce continuously on time t for test objective in this duty factor 60, wherein drawn continuously less average pump voltage 56.
Upper curve in the accompanying drawing of Fig. 3 shows the fuel delivery 58 that belongs to respectively duty factor 60.Can find out, fuel delivery 58 is along with the duty factor 60 that diminishes descends continuously, and therefore drawn the clear and definite relation between two curves.The length in the time lag shown in Figure 3 is roughly hundred times of length in time lag shown in figure 2.Therefore, the fluctuation of the short time that can find out in Fig. 3 of fuel delivery 58 can be compared with the fluctuation of fuel delivery 58 in Fig. 2.
Fig. 4 shows the simplified flow chart for the method for operation fuel system 10.Started process shown in Figure 4 in starting frame 62, it for example can be processed by means of computer program 34.
In the square frame 64 of back, as long as unshowned in the drawings internal combustion engine operation, relay 40 just is switched on operating voltage 48 constantly.Test in inquiry frame 66: whether the adjusting to the fuel pressure in high pressure accumulator 28 of implementing by means of flow control valve 22 is assessed as trouble-free.If correct, infer that so fuel system 10 normally move, and rotate back into square frame 64 start locate.
If incorrect, as to infer fuel system 10 interference operation.In this running state, flow control valve 22 can not be controlled the fuel quantity that will carry basically again.Flow control valve 22 for example damages, and perhaps electromagnetically-operated device 20 does not have electricity (contact fault or " plug drops ") and flow control valve 22 therefore fully or relatively widely to open constantly.Then next by following manner, implement to be used for the urgent operation of fuel system 10: by means of the beat of relay 40, realized alternative adjusting to the fuel pressure at high pressure accumulator 28.
To find out the fuel pressure of current existence in high pressure accumulator 28 in this square frame in back 68 by means of pressure transducer 29, and itself and rating value are compared.In the square frame 70 of back, if current fuel pressure is positioned under rating value, duty factor 60 has improved a difference.If current fuel pressure is positioned on rating value, duty factor 60 has reduced a difference on the contrary.Realize the adjusting that fuel delivery 58 is determined thus by means of the PID regulator at this.According to whether digitally or in analog carrying out this adjusting, described difference is limited little or infinitely small.
In the square frame 72 of back, can once be recorded in the fault memorizer of control and/or controlling device 30, and addedly for example give a warning on the instrument panel of Motor Vehicle.Then this process is got back to the place that starts of inquiry frame 66.
The method can differently also in servicely be regulated fuel transfer pump 16 fuel system 10 is normal by means of the beat of relay 40 or by means of square frame 68,70 and 72 with said process equally.In addition, flow control valve 22 can lack in case of necessity.
Claims (9)
1. method that is used for the fuel system (10) that operation of combustion engine uses, wherein said fuel system (10) comprises at least one electrically driven (operated) fuel transfer pump (16), it is characterized in that, the fuel transfer pump (16) of electricity is switched on operating voltage (48) with the form of pulsewidth modulation (59) by means of relay (40) recurrent pulses with exciting.
2. method according to claim 1, is characterized in that, the duty factor (60) of pulsewidth modulation (59) is controlled relatively and/or regulates with the fuel quantity (58) that will carry.
3. method according to claim 1 and 2, is characterized in that, the frequency of pulsewidth modulation (59) is 1 hertz to 100 hertz, preferred approximately 10 hertz.
4. according to claim 2 or 3 described methods, it is characterized in that, control relatively and regulate described duty factor (60) with the average fuel pressure in high pressure accumulator (28), wherein fuel pressure is found out at least one cycle (61) of pulsewidth modulation (59).
5., according at least one described method in aforementioned claim, it is characterized in that, the fuel transfer pump (16) of electricity is the pre-oil feed pump in fuel system (10).
6. according at least one described method in aforementioned claim, it is characterized in that, in the first running state, the fuel transfer pump (16) of electricity is switched on operating voltage (48) constantly by means of relay (40), and in the second running state, the fuel transfer pump (16) of electricity is switched on operating voltage (48) with the form of pulsewidth modulation (59) by means of relay (40) recurrent pulses with exciting.
7. method according to claim 6, it is characterized in that, the second running state is the urgent running state of fuel system (10), and wherein fuel system (10), device (22) control the described fuel quantity that will carry (58) in the first running state basically no longer or can not control the described fuel quantity that will carry (58) again.
8. control and/or a controlling device (30) that is used for internal-combustion engine, is characterized in that, described control and/or controlling device are designed for the described method of any one in execution according to claim 1 to 7.
9. a computer program (34) that is used for control and/or controlling device (30), is characterized in that, described computer program is programmed for carrying out the described method of any one according to claim 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210207744 DE102012207744A1 (en) | 2012-05-09 | 2012-05-09 | Method for operating fuel system of internal combustion engine mounted in e.g. motor vehicle, involves pulsing electrically driven fuel pump, periodically, in manner of pulse width modulation, by a relay and connecting to power supply |
| DE102012207744.8 | 2012-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103388544A true CN103388544A (en) | 2013-11-13 |
Family
ID=49475484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101666157A Pending CN103388544A (en) | 2012-05-09 | 2013-05-08 | A method of operating a fuel system for an internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103388544A (en) |
| DE (1) | DE102012207744A1 (en) |
| FR (1) | FR2990473A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107110028A (en) * | 2015-02-16 | 2017-08-29 | 大陆汽车有限公司 | For adjusting the method that fuel feeds pump |
| CN110043404A (en) * | 2017-12-05 | 2019-07-23 | 本田技研工业株式会社 | The control device of petrolift |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE539663C2 (en) * | 2014-09-15 | 2017-10-24 | Scania Cv Ab | High-pressure fuel pump for a fuel system and method for controlling a fuel system comprising such a pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07167072A (en) * | 1993-12-17 | 1995-07-04 | Showa Electric Wire & Cable Co Ltd | Vacuum pump starting device |
| DE102005020362A1 (en) * | 2005-05-02 | 2006-11-09 | Robert Bosch Gmbh | Control method for volume flow and pressure regulation of motor vehicle internal combustion engine fuel feed uses common actuator for respective valves |
| DE102007035718A1 (en) * | 2007-07-30 | 2009-02-05 | Robert Bosch Gmbh | Method for controlling pre-supply pressure of common rail fuel system of internal combustion engine, lying high-pressure pump against pressure side, where pre-supply pressure comprises pre-supply pump |
-
2012
- 2012-05-09 DE DE201210207744 patent/DE102012207744A1/en not_active Withdrawn
-
2013
- 2013-05-07 FR FR1354167A patent/FR2990473A1/en active Pending
- 2013-05-08 CN CN2013101666157A patent/CN103388544A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107110028A (en) * | 2015-02-16 | 2017-08-29 | 大陆汽车有限公司 | For adjusting the method that fuel feeds pump |
| CN107110028B (en) * | 2015-02-16 | 2020-07-10 | 大陆汽车有限公司 | Method for regulating a fuel feed pump |
| CN110043404A (en) * | 2017-12-05 | 2019-07-23 | 本田技研工业株式会社 | The control device of petrolift |
| CN110043404B (en) * | 2017-12-05 | 2021-05-18 | 本田技研工业株式会社 | Fuel pump control device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012207744A1 (en) | 2013-11-14 |
| FR2990473A1 (en) | 2013-11-15 |
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Application publication date: 20131113 |