WO2007122023A1 - Kraftstoff-hochdruck-fördereinrichtung - Google Patents
Kraftstoff-hochdruck-fördereinrichtung Download PDFInfo
- Publication number
- WO2007122023A1 WO2007122023A1 PCT/EP2007/051410 EP2007051410W WO2007122023A1 WO 2007122023 A1 WO2007122023 A1 WO 2007122023A1 EP 2007051410 W EP2007051410 W EP 2007051410W WO 2007122023 A1 WO2007122023 A1 WO 2007122023A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- flow path
- fuel
- pump
- low
- Prior art date
Links
Classifications
-
- 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
-
- 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
- F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
-
- 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
- F02M63/0275—Arrangement of common rails
- F02M63/028—Returnless common rail 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
- 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
Definitions
- the invention relates to a high-pressure fuel delivery device according to the preamble of claim 1.
- Common rail fuel systems for internal combustion engines with direct fuel injection are known from the market.
- Such fuel systems include an electric priming pump that delivers the fuel from a tank to a high pressure fuel delivery system.
- This in turn comprises a mechanically driven by the internal combustion engine piston high-pressure pump, which promotes the fuel to the common rail.
- the fuel is first directed from a fuel inlet of the high-pressure fuel delivery device into the interior of a housing of the high-pressure pump, in particular into a receiving space for the drive shaft. From there, most of the fuel continues to flow to the inlet valves of the high pressure pump.
- a return flow path commonly referred to as a return line.
- the present invention has the object, a high-pressure fuel conveyor of the to provide the aforementioned type, which allows a cheaper construction of the fuel system.
- the return flow path does not leave the high-pressure fuel delivery device, but is integrated into it.
- the fuel passing through, for example, the shaft bearings and / or shaft seals of the drive shaft is not returned to the tank but remains within the high pressure fuel delivery by being introduced into the low pressure flow path. In this way, an undesirable heating of the fuel stored in the fuel tank is avoided.
- An advantageous embodiment of the fuel high-pressure conveyor according to the invention is characterized in that it comprises an integrated prefeed pump. This creates a particularly compact and powerful high-pressure fuel delivery device.
- the prefeed pump is arranged in the low-pressure flow path, and that the return flow path upstream of the prefeed pump in the low pressure flow path opens.
- a fuel system with such designed high-pressure fuel delivery device is particularly simple and compact.
- a mechanical pressure control valve may be provided with a return channel, which opens upstream of the prefeed pump in the low-pressure flow path.
- a return channel which opens upstream of the prefeed pump in the low-pressure flow path.
- the high-pressure fuel delivery device can be connected to an external feed pump.
- an external feed pump Such may, for example, be provided in the region of the tank of the fuel system to which the high-pressure fuel delivery device belongs. In this way it is avoided that a fuel line with comparatively low pressure is present between the high-pressure fuel conveyor and the tank, in which, for example, vapor bubbles can form.
- a particularly advantageous development of the high-pressure fuel delivery device is characterized in that an ejector pump is arranged in the low-pressure flow path, which is driven by the fuel flowing to the inlet valve and into which the return flow path opens.
- the passing through the shaft bearings for example, amount of fuel is sucked in this way by the suction jet pump.
- the sum of the amount of fuel flowing directly from the receiving space to the inlet valve and the amount of flow recirculated via the return flow path is then available as a high-pressure delivery quantity.
- Such a high-pressure fuel delivery device has a good efficiency, and moreover, the lubrication of the bearings is improved by the forced extraction of the lubricating fuel.
- an external prefeed pump is provided, with which the fuel high-pressure conveyor is connectable, the return of the lubricating fuel is ensured even at low speeds of the high pressure pump by such a suction jet pump.
- the adjustment of the prefeed pressure that is, the pressure with which the fuel through the receiving space to the intake valve is required to be particularly well adjusted.
- the prefeed pump is electrically driven, the adjustment of the prefeed pressure, that is, the pressure with which the fuel through the receiving space to the intake valve is required to be particularly well adjusted.
- a particularly compact high-pressure fuel delivery device can be created.
- an adjustable throttle device In the low pressure flow path may be disposed downstream of the mouth of the return flow path, an adjustable throttle device.
- metering unit throttle device allows adjustment of the delivery of the high-pressure pump and thus the high-pressure fuel conveyor.
- the delivery rate is not influenced by the amount of fuel returned via the return flow path.
- At least one flow restrictor can be arranged. Through this, the amount of fuel returned via the return flow path can be adjusted in a targeted manner, which further improves the efficiency of the high-pressure fuel delivery device according to the invention.
- Figure 1 is a schematic representation of a fuel system with a first embodiment of a high pressure fuel delivery device
- Figure 2 is a view similar to Figure 1, but with a second embodiment of a high-pressure fuel conveyor.
- a fuel system carries the overall reference numeral 10. It belongs to an internal combustion engine, not shown, which in turn drives a motor vehicle, not shown.
- the fuel system 10 includes a fuel tank 12 in which a liquid fuel, such as gasoline or diesel, is stored. From the fuel tank 12, a fuel line 14 via a filter 16 to a high-pressure fuel conveyor 18. In this, the fuel is compressed to a high pressure and conveyed to a fuel pressure accumulator 20, which is also referred to as "rail". To the rail 20 a plurality of fuel injectors 22 are connected, which inject the fuel directly into them associated combustion chambers (not shown) of the internal combustion engine. To the rail 20, a controllable pressure relief valve 24 is connected, from which a drain line 26 leads back to the fuel tank 12.
- the high-pressure fuel delivery device 18 includes a fuel inlet 28 to which the fuel line 14 is connected. From the fuel inlet 28, a channel 30 leads to a prefeed pump 32, which is integrated into the high-pressure fuel delivery device 18. From the prefeed pump 32, a channel 34 leads to a high-pressure pump 36.
- the high-pressure pump 36 as well as the prefeed pump 32 is mechanically driven by the internal combustion engine, for example by a camshaft of the internal combustion engine.
- the high pressure pump 36 comprises a housing 38 having a receiving space 40 for a provided with a cam 42 drive shaft 44. This works with two pistons 46 a and 46 b together, the delivery spaces 48 a and 48 b limit.
- a channel 50 leads to an adjustable throttling device 52, from which in turn pass channels 54a and 54b via intake valves 56a and 56b to the delivery chambers 48a and 48b.
- Channels 58a and 58b connect delivery chambers 48a and 48b to exhaust valves 60a and 60b. These simultaneously form a fuel outlet of the high-pressure fuel delivery device, to which the rail 20 is connected.
- the drive shaft 44 is mounted in the housing 38 of the high-pressure pump 36 by shaft bearings.
- the receiving space 40 is sealed to the outside via corresponding shaft seals.
- These are not absolutely dense and therefore indicated in Figure 1 by channels 62a and 62b and corresponding throttles 64a and 64b.
- the throttle or shaft seal 64a is arranged in a housing cover, the throttle or shaft seal 64b in a housing body. About limiting throttles 65a and 65b lead the channels 62a and 62b back to the channel 30.
- the mouth is designated 66.
- an overflow channel 68 branches off, in which a mechanical pressure control or overflow valve 70 is arranged.
- the overflow channel 68 opens into the channel 62 a and thus ultimately into the channel 30 at 66.
- the fuel is sucked in by the prefeed pump 32 from the fuel tank 12 and compressed to a comparatively low prefeed pressure, for example 4 bar, and conveyed into the receiving space 40 at this pressure. There it serves to cool and lubricate the bearings of the drive shaft 44. From the receiving space 40, the fuel flows via the adjustable throttle 52 to the intake valves 56a, b and on into the delivery chambers 48a, b, where it is compressed and via the outlet valves 60a, b for Rail 20 is promoted.
- a comparatively low prefeed pressure for example 4 bar
- the fuel passing through for the lubrication of the bearings of the drive shaft 44 and via the shaft seals 64a, b is conveyed away via the return flow path 62a, b to the suction side (channel 30) of the prefeed pump 32 and sucked back therefrom.
- FIG. 10 A fuel system 10 with an alternative embodiment of a high pressure fuel delivery device 18 is shown in FIG. It is true that such elements and areas that have equivalent functions to previously described elements and areas, the same reference numerals and are not explained in detail again.
- the feed pump 32 is not integrated into the high-pressure fuel delivery device 18, but arranged as an external prefeed pump 32 in the region of the fuel tank 12. It is also not powered by the internal combustion engine, but electrically.
- the pressure control valve 70 with the overflow channel 68 is arranged in the region of the prefeed pump 32 close to the fuel tank 12.
- a suction jet pump 74 is arranged in the channel 50, which leads from the receiving space 40 via the adjustable throttle 52 to the channels 54a, b and on to the inlet valves 56a, b. This is thus driven by the fuel flowing from the receiving chamber 40 to the inlet valves 56a, b, and in 66 opens the return flow path 62a, b.
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
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07726366A EP2013471B1 (de) | 2006-04-21 | 2007-02-14 | Kraftstoff-hochdruck-fördereinrichtung |
AT07726366T ATE535707T1 (de) | 2006-04-21 | 2007-02-14 | Kraftstoff-hochdruck-fördereinrichtung |
BRPI0706557-4A BRPI0706557A2 (pt) | 2006-04-21 | 2007-02-14 | dispositivo de transporte de alta pressão de combustìvel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006018702.4 | 2006-04-21 | ||
DE102006018702A DE102006018702A1 (de) | 2006-04-21 | 2006-04-21 | Kraftstoff-Hochdruck-Fördereinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007122023A1 true WO2007122023A1 (de) | 2007-11-01 |
Family
ID=37965025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/051410 WO2007122023A1 (de) | 2006-04-21 | 2007-02-14 | Kraftstoff-hochdruck-fördereinrichtung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2013471B1 (de) |
CN (1) | CN101427020A (de) |
AT (1) | ATE535707T1 (de) |
BR (1) | BRPI0706557A2 (de) |
DE (1) | DE102006018702A1 (de) |
WO (1) | WO2007122023A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012052225A1 (de) * | 2010-10-18 | 2012-04-26 | Robert Bosch Gmbh | Kraftstoffpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008017222A1 (de) * | 2008-04-04 | 2009-10-08 | Continental Automotive Gmbh | Pumpenanordnung zur Förderung eines Fluids |
DE102008001704A1 (de) | 2008-05-09 | 2009-11-12 | Robert Bosch Gmbh | Kraftstofffördereinrichtung |
DE102010026159A1 (de) | 2010-07-06 | 2012-01-12 | Audi Ag | Kraftstoffsystem für eine Brennkraftmaschine |
DE102011003089A1 (de) | 2011-01-25 | 2012-07-26 | Robert Bosch Gmbh | Überströmventil eines Krafteinspritzsystems |
DE102011075474A1 (de) | 2011-05-09 | 2012-11-15 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102011089623A1 (de) | 2011-12-22 | 2013-06-27 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für ein Kraftstoffeinspritzsystem sowie Kraftstoffeinspritzsystem |
DE102012203724A1 (de) | 2012-03-09 | 2013-09-12 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für ein Kraftstoffeinspritzsystem mit einem Überströmventil sowie Überströmventil |
DE102012210177A1 (de) | 2012-06-18 | 2013-12-19 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für ein Kraftstoffeinspritzsystem sowie Kraftstoffeinspritzsystem |
DE102012212062A1 (de) | 2012-07-11 | 2014-01-16 | Robert Bosch Gmbh | Niederdruckkreislauf für ein Kraftstoffeinspritzsystem, Kraftstoffeinspritzsystem sowie Verfahren zum Betreiben eines Kraftstoffeinspritzsystems |
DE102015217863A1 (de) * | 2015-09-17 | 2017-03-23 | Continental Automotive Gmbh | Kraftstoffeinspritzsystem |
CN110691904B (zh) * | 2017-03-29 | 2021-08-03 | 瓦锡兰芬兰有限公司 | 用于内燃机活塞发动机的高压燃料泵组件 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19714488C1 (de) | 1997-04-08 | 1998-09-03 | Siemens Ag | Verfahren zum Erwärmen von Kraftstoff und Kraftstoffeinspritzanlage |
DE19941689A1 (de) * | 1999-09-01 | 2001-03-15 | Siemens Ag | Einspritzanlage für eine Brennkraftmaschine |
WO2002040857A2 (de) | 2000-11-18 | 2002-05-23 | Robert Bosch Gmbh | Kraftstoffeinspritzanlage für brennkraftmaschinen mit verbessertem startverhalten |
WO2003067075A1 (de) * | 2002-02-08 | 2003-08-14 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
EP1457667A1 (de) * | 2003-03-11 | 2004-09-15 | Denso Corporation | Kraftstoffpumpe, die vom Kraftstoff geschmiert wird |
-
2006
- 2006-04-21 DE DE102006018702A patent/DE102006018702A1/de not_active Withdrawn
-
2007
- 2007-02-14 WO PCT/EP2007/051410 patent/WO2007122023A1/de active Application Filing
- 2007-02-14 BR BRPI0706557-4A patent/BRPI0706557A2/pt not_active IP Right Cessation
- 2007-02-14 CN CNA2007800143041A patent/CN101427020A/zh active Pending
- 2007-02-14 EP EP07726366A patent/EP2013471B1/de not_active Not-in-force
- 2007-02-14 AT AT07726366T patent/ATE535707T1/de active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19714488C1 (de) | 1997-04-08 | 1998-09-03 | Siemens Ag | Verfahren zum Erwärmen von Kraftstoff und Kraftstoffeinspritzanlage |
DE19941689A1 (de) * | 1999-09-01 | 2001-03-15 | Siemens Ag | Einspritzanlage für eine Brennkraftmaschine |
WO2002040857A2 (de) | 2000-11-18 | 2002-05-23 | Robert Bosch Gmbh | Kraftstoffeinspritzanlage für brennkraftmaschinen mit verbessertem startverhalten |
WO2003067075A1 (de) * | 2002-02-08 | 2003-08-14 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
EP1457667A1 (de) * | 2003-03-11 | 2004-09-15 | Denso Corporation | Kraftstoffpumpe, die vom Kraftstoff geschmiert wird |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012052225A1 (de) * | 2010-10-18 | 2012-04-26 | Robert Bosch Gmbh | Kraftstoffpumpe für ein kraftstoffeinspritzsystem einer brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
EP2013471A1 (de) | 2009-01-14 |
ATE535707T1 (de) | 2011-12-15 |
CN101427020A (zh) | 2009-05-06 |
DE102006018702A1 (de) | 2007-10-25 |
BRPI0706557A2 (pt) | 2011-03-29 |
EP2013471B1 (de) | 2011-11-30 |
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