CN103228904B - Fuel injection system - Google Patents
Fuel injection system Download PDFInfo
- Publication number
- CN103228904B CN103228904B CN201180056584.9A CN201180056584A CN103228904B CN 103228904 B CN103228904 B CN 103228904B CN 201180056584 A CN201180056584 A CN 201180056584A CN 103228904 B CN103228904 B CN 103228904B
- Authority
- CN
- China
- Prior art keywords
- fuel
- pressure
- injection system
- fuel injection
- 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.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 128
- 238000002347 injection Methods 0.000 title claims abstract description 40
- 239000007924 injection Substances 0.000 title claims abstract description 40
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/447—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
-
- 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
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0028—Valves characterised by the valve actuating means hydraulic
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of fuel injection system of internal-combustion engine, especially common-rail injection system, this fuel injection system has machine fuel transfer pump, and fuel is supplied to high-pressure service pump via low-pressure line by it.Fuel under high pressure is supplied to high pressure accumulator via high pressure line by described high-pressure service pump, and wherein, the quantity delivered of described fuel transfer pump can regulate via Stress control.
Description
Technical field
The present invention relates to a kind of fuel injection system for internal-combustion engine, especially common-rail injection system.
Background technique
In the prior art, high-pressure injection system, such as common rail system is known, and described high-pressure injection system has high-pressure service pump so that fuel under high pressure is provided to fuel storage device, and wherein, fuel is transported to high-pressure service pump by fuel tank by mechanical or electric transfer pump.
Here, for high-pressure service pump transfer the fuel, use different transfer pump designs, such as inner or outside conveyance gear pump and vane pump.The different transfer pumps used have by the reliable predetermined quantity delivered of pump geometrical shape, the throttle valve restriction maximum flow of described quantity delivered also such as by installing in suction side.
In order to meet the starting condition of automobile, need relatively large pump because of less rotating speed, but significant need is carried large amount and is thus caused loss when higher rotating speed.
Further, the known fuel quantity carried to described high-pressure service pump regulates via electrical measurement unit, and described electrical measurement cell layout is on described high-pressure service pump.
Such as from the known a kind of fuel system of DE2005052636A1, described fuel system comprises transfer pump, fuel from fuel container by described transfer pump via measuring unit carry arrive high-pressure service pump, described high-pressure service pump compressed fuel and to high pressure accumulator supply fuel.Multiple fuel injector is connected on high pressure accumulator.In addition, the pressure in high pressure accumulator regulates by pressure regulator valve (control valve).From high pressure accumulator control row fuel return to fuel reservoir.
Adversely, in the petrolift that known mechanical drives, adaptive for quantity delivered each demand can not be changed up to now.
Therefore need to propose a kind of fuel injection system, especially common rail system, the quantity delivered of mechanically operated fuel transfer pump adaptive described demand in a straightforward manner can be made in described fuel injection system.
Summary of the invention
According to the present invention, a kind of fuel injection system for internal-combustion engine is provided, especially common-rail injection system, described fuel injection system has machine fuel transfer pump, machine fuel transfer pump supplies fuel to high-pressure service pump via low-pressure line, and wherein, fuel under high pressure is supplied high pressure accumulator via high pressure line by described high-pressure service pump, wherein, the quantity delivered of described fuel transfer pump regulates via Stress control.By regulating the quantity delivered of described machine fuel transfer pump via Stress control, described fuel quantity can reduce in an advantageous manner, such as, when reaching goal pressure in high pressure accumulator.By reducing described fuel quantity, the power loss of whole ejecting system also can reduce.According to the fuel transfer pump that another advantage of structure of the present invention is relative to electric runing adjustment, use valve to obtain less current needs thus.Also the overall power efficiency of described fuel injection system can be improved thus.
There is provided a kind of proportioner according to a preferred embodiment, it is integrated in described fuel transfer pump.
According to another preferred embodiment, quantity delivered restricting means is arranged on upstream or the downstream of fuel transfer pump.
Preferably, described Stress control is realized by the voltage-controlled row of height.
Alternatively, described Stress control also realizes by low voltage-controlled row.
Also according to another preferred embodiment, pressure regulator valve is arranged on high pressure accumulator, wherein, the control discharge capacity of described pressure regulator valve accumulates on throttle valve, wherein, the pressure relying on control discharge capacity raises and is applied on acting surface, and described pressure raises and reacts on Returnning spring, and wherein, on the described acting surface proportioner that is applied to petrolift or quantity delivered restricting means.
Preferably, be parallel to Returnning spring and arrange damping device.Described damping device can be used in making the adaptive described demand of the dynamics of described structure in an advantageous manner.
According to another preferred embodiment, be provided with the measuring unit for measuring the fuel quantity being transported to high-pressure service pump.
Also according to another preferred embodiment, described measuring unit has Proportional valve, divide the fuel outputted between described high pressure delivery side of pump and the outlet outputting to return line, wherein, the fuel quantity be branched off in described reset pipeline accumulates on throttle valve, this causes the pressure of the amount of depending on to raise, described pressure raises and reacts on described Returnning spring, and wherein, described acting surface is applied on the proportioner of described fuel transfer pump or the proportioner of quantity delivered restricting means.
Preferably, described fuel transfer pump is adjustable, especially vane pump, internal gear pump or piston or diaphragm type pump, or uncontrollable fuel transfer pump.Particularly advantageously, use vane pump here, because therefore described transfer pump also reduces quantity delivered by mobile or rotation outer shroud very simply to reduce eccentricity there.In contrast, such as, use internal gear pump, in described internal gear pump, the direction of the eccentricity of external devices rotates, here the same volume reducing transfer.If use uncontrollable fuel transfer pump, then it can be such as the gear pump of outside conveying, uncontrollable internal gear pump and vane pump etc., and their quantity delivered is limited by adjustable upstream throttle control valve unit.The very simple and cost-effective of the enforcement of this embodiment.On the other hand, when using uncontrollable fuel transfer pump, the valve in downstream with alap stress level by the suction side of unnecessary fuel return to described pump.But the quantity delivered of practical adjustments fuel transfer pump or the backflow in downstream are regulated by pressure according to the present invention in each case a to be carried out.
Accompanying drawing explanation
Below with reference to accompanying drawings, embodiment of the present invention will be described in more detail.Shown in the drawings:
Fig. 1 is according to the fuel injection system of prior art;
Fig. 2 is according to the fuel injection system of an embodiment;
Fig. 3 is according to the fuel injection system of another embodiment;
Fig. 4 A-4D is the schematic diagram of the section of pump low tension loop according to an embodiment respectively.
Embodiment
Fig. 1 shows the fuel injection system 1 of prior art, for IC engine supply 2, but schematically shows by means of only dot and dash line in FIG.Fuel injection system 1 comprises fuel container 3, electric drive fuel transfer pump 4 from fuel container 3 by fuel area density to low-pressure line 5, be transported to measuring unit 6.In measuring unit 6 downstream, low-pressure line 5 is transported to by the mechanically operated high-pressure service pump 7 of internal-combustion engine 2.High-pressure service pump 7 compressed fuel is to very high pressure and be transported in high pressure accumulator 9 by them via high pressure line 8, and high pressure accumulator 9 is also referred to as " track ".Multiple sparger 10 is connected on described track, injects fuel in the firing chamber of unshowned internal-combustion engine 2.
Control valve 11 is connected on high pressure accumulator 9, controls comb line 12 reflux to fuel container 3 by control valve 11.In control comb line 12, throttle valve 13 is set.The portion section 12a being positioned at throttle valve 13 upstream of control comb line 12 represents, and the portion section 12b being arranged in throttle valve 13 downstream represents.The hydraulic control lines 14 that the portion section 12a being positioned at throttle valve 13 upstream of control comb line 12 represents by dotted line and being connected with measuring unit 6.The region 12b being positioned at throttle valve 13 downstream controlling pipeline 15 connection control comb line 12 is connected with measuring unit 6 equally.
The operation of fuel system 1 is by controlling to control with controlling device 16 or regulate.Control and controlling device 16 are also called " controller " usually simply.Controller 16 receives the signal from pressure transducer 17, and pressure transducer 17 detects the pressure in high pressure accumulator 9.When another control valve 11, depend on the SC sigmal control controller 16 of pressure transducer 17.
Fig. 2 illustrates the fuel injection system 1 according to an embodiment, performs high voltage-controlled row.In loop shown here, by fuel transfer pump 4, fuel is supplied high-pressure service pump 7 from fuel container 3, fuel transfer pump 4 is configured to mechanically operated vane pump here, and then high-pressure service pump 7 supplies fuel under high pressure to high pressure accumulator 9, supplies fuel by high pressure accumulator 9 to sparger 10.At high pressure accumulator 9 arranged downstream pressure regulator valve 18 and throttle valve 13.If reach goal pressure in high pressure accumulator 9, open pressure regulator valve 18, to make a certain amount of fuel of control row.The control discharge capacity of pressure regulator valve 18 accumulates on throttle valve 13, and this raises for the pressure depending on control discharge capacity and is applied on acting surface, and described pressure raises reaction Returnning spring 19.This acting surface is applied to again in the controlling device of fuel transfer pump 4, and this controlling device correspondingly regulates or reduces described quantity delivered.In position of rest, if namely not or only have minimum back pressure to be acted in control comb line 12 by high pressure accumulator 9, the fuel delivery of fuel transfer pump 4 reaches maximum on the contrary.Further, fuel transfer pump 4 has damping device 23, to make the adaptive described demand of the dynamic mechanical of structure.
Throttle valve 13 or fuel transfer pump 4 can be parallel to as shown in FIG. arrange, or be also alternately directly integrated in fuel transfer pump 4.Here the advantage be arranged in parallel shown in is the temperature load of fuel transfer pump 4.
According to the example of fuel transfer pump 4, additionally there is (unshowned) measuring unit, described measuring unit is born accurate fuel delivery in high pressure accumulator 9 and is measured, and wherein, fuel transfer pump 4 is only born and entered control.But as shown here, if save described measuring unit, fuel transfer pump 4 regulates the fuel quantity that will compress, this is the solution that an abnormal cost is suitable for.
Fig. 3 illustrates the fuel injection system 1 according to another preferred embodiment, performs low voltage-controlled row.Compared with the embodiment shown in Fig. 2, replace the control discharge capacity of the pressure regulator valve 18 on high pressure accumulator 9 used in case, use the modified example (ZME/MPROP) of measuring unit 6.The fuel that will compress divides the outlet of high-pressure service pump 7 and reflux pipeline 20 by the Proportional valve in measuring unit 6.Fuel quantity, is branched off in reflux pipeline 20, again accumulates on throttle valve 13, has described in contact Fig. 2, and this causes raising at effect upward pressure and therefore limiting the fuel delivery of fuel transfer pump 4.Because the complete arrangement in area of low pressure, do not calculate high temperature in this embodiment, the layout of throttle valve 13 to be directly arranged in fuel transfer pump 4 or equally may in other amount control device thus.But, illustrate in the drawings and be arranged in parallel.In position of rest, namely do not have in the reflux pipeline 20 of measuring unit 6 or only have minimum back pressure (ZME/MPROP), the quantity delivered of fuel transfer pump 4 is maximum.If reach the goal pressure in high pressure accumulator 9, the parallel path (ZME/MPROP) of measuring unit 6 opened by regulator 25, to make the controlled row of unnecessary fuel quantity.This control discharge capacity causes raising at the acting surface upward pressure of fuel transfer pump 4, correspondingly reduces to make described fuel delivery.
Fig. 4 A to 4D schematically shows portion's section of the pump low tension loop according to an embodiment respectively, wherein, in Figure 4 A, throttle valve 13 in branch 23 arranged in front of the suction valve 22 to high-pressure service pump 7 in drive unit 21 upstream of high-pressure service pump 7.The embodiment illustrated in figure 4b is different from the embodiment's part illustrated in Figure 4 A and is, throttle valve 13 is arranged in described drive unit downstream here.In figure 4 c, pressure regulator valve 18 is arranged between drive unit 21 and suction valve 22, but in the embodiment described in Fig. 4 D, drive unit 21 and suction valve 22 are arranged in parallel to each other and pressure regulator valve 18 is arranged in the downstream of drive unit 21.All four embodiments carry out work according to the principle contacted described by Fig. 2 and 3 above.Further, all four embodiments are not provided with measuring unit 6.But this can additionally be arranged on all appropriate locations between fuel transfer pump 4 and suction valve 22 respectively.
In a word, by structure according to the present invention, provide a kind of fuel injection system 1, in fuel injection system 1, the fuel delivery of machine fuel transfer pump 4 correspondingly regulates respective demand in a simple and effective way.
Claims (13)
1. for the fuel injection system (1) of internal-combustion engine (2), described fuel injection system (1) has machine fuel transfer pump (4), described machine fuel transfer pump (4) via low-pressure line (5) to high-pressure service pump (7) transfer the fuel, wherein, described high-pressure service pump (7) supplies fuel under high pressure via high pressure line (8) to high pressure accumulator (9), it is characterized in that, the quantity delivered of described fuel transfer pump (4) regulates by pressure.
2. fuel injection system according to claim 1 (1), is characterized in that, be provided with proportioner, and it is integrated in described fuel transfer pump (4).
3. fuel injection system according to claim 1 (1), is characterized in that, quantity delivered restricting means is arranged on upstream or the downstream of described fuel transfer pump (4).
4. fuel injection system according to any one of claim 1 to 3 (1), is characterized in that, described pressure is regulated and realized by the voltage-controlled row of height.
5. fuel injection system according to any one of claim 1 to 3 (1), is characterized in that, described pressure is regulated and realized by low voltage-controlled row.
6. fuel injection system according to claim 3 (1), is characterized in that,
Pressure regulator valve (18) is arranged on described high pressure accumulator (9), wherein, the control discharge capacity of described pressure regulator valve (18) accumulates on throttle valve (13), wherein, the pressure depending on control discharge capacity raises and is applied on acting surface, described pressure raises and reacts on Returnning spring (19), and wherein said acting surface be applied to described fuel transfer pump (4) proportioner on or be applied on described quantity delivered restricting means.
7. fuel injection system according to claim 6 (1), is characterized in that, damping device (23) is parallel to described Returnning spring (19) and arranges.
8. fuel injection system according to claim 6 (1), is characterized in that, is provided with for measuring the measuring unit (6) being transported to the fuel quantity of described high-pressure service pump (7).
9. fuel injection system according to claim 8 (1), it is characterized in that, described measuring unit (6) is provided with Proportional valve, for dividing fuel to be transported to described high-pressure service pump (7) and to be transported in reflux pipeline (20), wherein, the fuel quantity be branched off in described reflux pipeline (20) accumulates on throttle valve (13), this causes the pressure of the amount of depending on acting surface to raise, this pressure raises and reacts on described Returnning spring (19), and on the proportioner that wherein said acting surface is applied to described fuel transfer pump (4) or on described quantity delivered restricting means.
10. fuel injection system according to any one of claim 1 to 3 (1), is characterized in that, described fuel transfer pump (4) is adjustable.
11. fuel injection systems according to claim 1 (1), is characterized in that, described fuel injection system (1) is common-rail injection system.
12. fuel injection systems according to claim 10 (1), is characterized in that, described fuel transfer pump (4) is adjustable blades pump, internal gear pump or piston or diaphragm pump.
13. fuel injection systems according to any one of claim 1 to 3 (1), is characterized in that, described fuel transfer pump (4) is unadjustable.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010041487.5 | 2010-09-27 | ||
| DE201010041487 DE102010041487A1 (en) | 2010-09-27 | 2010-09-27 | Fuel injection system |
| PCT/EP2011/065075 WO2012041628A1 (en) | 2010-09-27 | 2011-09-01 | Fuel injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103228904A CN103228904A (en) | 2013-07-31 |
| CN103228904B true CN103228904B (en) | 2016-01-27 |
Family
ID=44583006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180056584.9A Expired - Fee Related CN103228904B (en) | 2010-09-27 | 2011-09-01 | Fuel injection system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2622204A1 (en) |
| CN (1) | CN103228904B (en) |
| DE (1) | DE102010041487A1 (en) |
| WO (1) | WO2012041628A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835813A (en) * | 2014-03-10 | 2014-06-04 | 大连理工大学 | Control method for composite fuel injection system |
| PE20210092A1 (en) | 2018-05-07 | 2021-01-11 | Mhwirth Gmbh | PULSATION CUSHIONING SYSTEM |
| CN116412051A (en) * | 2023-04-17 | 2023-07-11 | 中国舰船研究设计中心 | Pressure fluctuation elimination system for outlet of engine belt fuel pump of diesel engine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10318941A1 (en) * | 2003-04-26 | 2004-11-11 | Robert Bosch Gmbh | Fuel system for internal combustion engine has choke device whose choke effect can be varied arranged between first fuel pump with variable delivery rate and second fuel pump feeding storage device |
| CN100460667C (en) * | 2004-02-06 | 2009-02-11 | 博世株式会社 | Fuel supply system |
| DE102005052636A1 (en) | 2005-11-04 | 2007-05-10 | Robert Bosch Gmbh | Fuel system of an internal combustion engine |
| ATE457423T1 (en) * | 2007-09-11 | 2010-02-15 | Fiat Ricerche | FUEL INJECTION DEVICE WITH A VARIABLE FLOW HIGH PRESSURE FUEL PUMP |
| US7640919B1 (en) * | 2008-01-31 | 2010-01-05 | Perkins Engines Company Limited | Fuel system for protecting a fuel filter |
-
2010
- 2010-09-27 DE DE201010041487 patent/DE102010041487A1/en not_active Withdrawn
-
2011
- 2011-09-01 CN CN201180056584.9A patent/CN103228904B/en not_active Expired - Fee Related
- 2011-09-01 WO PCT/EP2011/065075 patent/WO2012041628A1/en active Application Filing
- 2011-09-01 EP EP11754353.8A patent/EP2622204A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012041628A1 (en) | 2012-04-05 |
| EP2622204A1 (en) | 2013-08-07 |
| CN103228904A (en) | 2013-07-31 |
| DE102010041487A1 (en) | 2012-03-29 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160127 Termination date: 20200901 |