EP3084200A1 - Fuel supply device of a fuel injection system of an internal combustion engine, and overflow valve for the same - Google Patents
Fuel supply device of a fuel injection system of an internal combustion engine, and overflow valve for the sameInfo
- Publication number
- EP3084200A1 EP3084200A1 EP14808944.4A EP14808944A EP3084200A1 EP 3084200 A1 EP3084200 A1 EP 3084200A1 EP 14808944 A EP14808944 A EP 14808944A EP 3084200 A1 EP3084200 A1 EP 3084200A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- line
- overflow valve
- fuel
- valve
- venturi nozzle
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 59
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 238000002347 injection Methods 0.000 title claims abstract description 7
- 239000007924 injection Substances 0.000 title claims abstract description 7
- 230000010349 pulsation Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- 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
- 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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- 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
- F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device
-
- 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
- a fuel supply device is a
- the overflow valve has a valve housing with a valve control chamber and a spring chamber, wherein the spring chamber is designed as a back space to the valve control chamber.
- Valve control chamber is hydraulically connected upstream of the metering unit with a delivery line, through the fuel from a feed pump to
- the valve control chamber further has an output which leads into a Ab Kunststofftechnisch, which with a non-pressurized
- the spring chamber is connected via a respective hydraulic connection line to the suction side of the high-pressure pump and to the discharge line.
- the hydraulic connection lines to the suction side of the high-pressure pump and the discharge line each have a throttle.
- the object of the present invention is to minimize disturbing pressure pulsations in the line system of the fuel supply device.
- Overflow valve is improved in a pulsating environment. This is achieved by the overflow valve over small pressure changes to the
- the spill valve should not be hydraulically damped.
- the backflow of the spring chamber via the throttle connection is prevented or reduced by the continuous extraction by means of the Venturi nozzle.
- the pulsation from the spring chamber takes place on the return.
- the essence of the invention is to achieve a discharge of fuel leakage from the spring chamber by the spring chamber is connected to the suction side of a Venturi nozzle to suck the fuel leakage from the spring chamber.
- the flow tube of the Venturi nozzle is arranged in a bypass line, wherein the bypass line between a feed line leading to the overflow valve and the discharge line is arranged and wherein an inlet portion of the Flow tube with the supply line and an outlet portion of the flow tube is hydraulically connected to the diversion line.
- the flow tube of the Venturi nozzle is arranged directly in the Ab Kunststofftechnisch, wherein the formation of the differential pressure in the Venturi nozzle, the flow of
- Flow tube having an inlet portion with an outlet-side connection of the diversion line and with an outlet portion with a return side
- the spring chamber is connected via a formed in the valve housing hydraulic connection line to a suction side of the Venturi nozzle.
- Overflow valve is the Venturi nozzle with a flow tube and with a
- a passage channel is arranged in the valve housing, in which the flow tube with an inlet portion, a
- a Ab tenual is arranged in the valve housing, in which the flow tube of the Venturi nozzle with a
- Inlet portion a constriction and an outlet portion is formed.
- the diversion channel is hydraulically connected to the diversion line.
- the introduced into the valve housing hydraulic connecting line expediently forms the suction tube of the
- Venturi nozzle
- FIG. 1 shows a fuel supply device with an overflow valve according to a first embodiment
- FIG. 2 shows a fuel supply device with an overflow valve according to a second embodiment
- FIG. 3 is a schematic representation of a Venturi nozzle
- FIG. 4 shows an inventive overflow valve according to FIG. 1 and FIG.
- FIG. 5 shows an inventive overflow valve according to FIG. 2.
- Figures 1 and 2 show a schematic representation of the
- the fuel supply device has a
- Fuel tank 19 are not shown fuel injectors
- the feed pump 16 operates as a pre-feed pump and sucks fuel through the suction line 11 from the tank 17 and promotes the fuel via a in the
- Delivery line 12 arranged fuel filter 23 to an inlet side of
- High-pressure pump 18 In the exemplary embodiments illustrated in FIGS. 1 and 2, the fuel supply device cooperates with a controllable metering unit 25. From the metering unit 25, a required amount of fuel is set, which via the Zumess Arthur 13 to a suction side of the high-pressure pump 18 is headed. The high-pressure pump 18 pumps the fuel at high pressure via the high-pressure line 15 into the fuel accumulator 19.
- the high pressure pump 18 is required
- Fuel tank 19 amount of fuel delivered to the needs of
- an overflow valve 30 is arranged upstream of the metering unit 25.
- the overflow valve 30 has a valve control chamber 31 and a
- Overflow valve 30 serves to those not required by the high-pressure pump 18
- Amount of fuel via the diversion line 28 in the return line 22 and the tank 17water sued suedn or deduce.
- discharge line 29 In the spring chamber 32 of the spill valve 30 performs a hydraulic connection, which is hereinafter referred to as discharge line 29.
- the discharge line 29 is connected to a suction side 41 of a Venturi nozzle 40.
- fuel leakage from the spring chamber 32 is sucked through the discharge line and into the
- the venturi nozzle 40 comprises on the suction side 41 a suction pipe 42 and a flow pipe 43 with an inlet section 44, a constriction 45 and a
- the suction pipe 42 opens. This creates due to the principle of action of the Venturi nozzle 40, a negative pressure in the suction pipe 42, which is transmitted via the discharge line 29 to the spring chamber 32, which in turn the accumulating in the spring chamber 32 fuel leakage the same sucked and discharged into the diversion line 28.
- the Venturi nozzle 40 is connected to the flow tube 43 to a bypass line 38 which extends between supply line 27 and Abêttechnisch 28.
- the bypass line 38 has a leading to the inlet portion 44
- inlet-side section 38.1 and an outlet section 46 leading away outlet-side section 38.2.
- the inlet-side section 38.1 is hydraulically connected to the supply line 27 and the outlet-side section 38.2 is connected to the discharge line 28. Due to the principle of action of the venturi nozzle 40, a suction effect is created in the suction pipe 42, so that the fuel is sucked out of the spring chamber 32 via the suction pipe 42 and the discharge line 29, discharged into the outlet-side section 38.2 of the bypass line 38 and further discharged into the discharge line 28.
- the Venturi nozzle 40 is arranged with the flow tube 43 in the Abschön 28 by the inlet portion 44 with a
- Suction pipe 42 is sucked out of the spring chamber 32 and discharged via the discharge line 29.
- the fuel leakage passes through the outlet section 46 of the
- FIGS 4 and 5 show the spill valve 30 with a valve housing 33, in which, for example, the Venturi nozzle 40 is integrated.
- the valve control chamber 31 is formed, in which an input 34 and at least one output 35 open, wherein the output 35 forms the already mentioned Abêtausgang.
- the discharge line 28 is connected.
- the valve control chamber 31 is a against the spring force of a compression spring 37 slidably disposed valve piston 36 exposed, depending on the pressure built up in the valve control chamber 31, the output 35 opens or closes by means of a control edge to the discharge line 28.
- valve piston 36 is against the Spring force of the compression spring 37 axially displaced, with increasing fuel pressure in the valve control chamber 31, the control edge of the valve piston 36, the output 35, as shown in Figure 4 and 5, releases.
- a quantity of fuel which is not required by the high-pressure pump 18 is discharged as a discharge quantity from the delivery line 12 via the discharge line 28 into the return line 22 and the tank 17.
- the compression spring 37 is disposed within the valve housing 33 in the spring chamber 32, which is formed as a back space to the valve control chamber 31.
- the compression spring 37 is disposed within the valve housing 33 in the spring chamber 32, which is formed as a back space to the valve control chamber 31.
- Valve piston 36 flows fuel leakage from the valve control chamber 31 in the spring chamber 32, wherein the accumulating in the spring chamber 32 fuel leakage as already described by means of the Venturi nozzle 40 is sucked off and discharged into the discharge line 28.
- Passage channel 52 is arranged, which are preferably introduced in each case in the axial direction in the valve housing 33.
- the diversion channel 51 has a hydraulic connection to the outlet 35 and is connected to the diversion line 28.
- the passageway 52 includes the flow tube 43 of the venturi 40 having the inlet portion 44, the throat 45, and the outlet portion 46
- the bypass line 38 is connected according to Figure 1, wherein the inlet-side portion 38.1 leads to the inlet portion 44 and the outlet-side portion 38.2 to the outlet portion 46.
- a hydraulic connecting line 53 leads from the spring chamber 32 to the suction side 41 of the Venturi nozzle 40 and communicates hydraulically with the suction pipe 42.
- the hydraulic connection line 53 in this case runs essentially transversely to the passage channel 52 through the valve housing 33 and simultaneously forms, for example, the suction tube 42 of the Venturi nozzle 40.
- the hydraulic connection line 53 or the suction tube 42 thus forms the discharge line hydraulically connected to the spring chamber 32 29 according to FIG. 1
- Connecting line 58 and the suction pipe 42 thus forms the discharge line 29 hydraulically connected to the spring chamber 32 according to FIG. 2.
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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013226649.9A DE102013226649A1 (en) | 2013-12-19 | 2013-12-19 | Fuel supply device of a fuel injection system of an internal combustion engine and overflow valve to it |
PCT/EP2014/076374 WO2015090961A1 (en) | 2013-12-19 | 2014-12-03 | Fuel supply device of a fuel injection system of an internal combustion engine, and overflow valve for the same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3084200A1 true EP3084200A1 (en) | 2016-10-26 |
EP3084200B1 EP3084200B1 (en) | 2018-02-28 |
Family
ID=52014067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14808944.4A Active EP3084200B1 (en) | 2013-12-19 | 2014-12-03 | Fuel supply device of a fuel injection system of an internal combustion engine, and overflow valve for the same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3084200B1 (en) |
CN (1) | CN105829695B (en) |
DE (1) | DE102013226649A1 (en) |
WO (1) | WO2015090961A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017212003A1 (en) * | 2016-09-16 | 2018-03-22 | Robert Bosch Gmbh | Overflow valve, in particular for use in a fuel injection system, high-pressure pump and fuel injection system |
DE102016219486A1 (en) * | 2016-10-07 | 2018-04-12 | Robert Bosch Gmbh | Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system |
IT201700059032A1 (en) * | 2017-05-30 | 2018-11-30 | Bosch Gmbh Robert | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
IT201800008132A1 (en) * | 2018-08-20 | 2020-02-20 | Magneti Marelli Spa | FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7690361B2 (en) * | 2007-09-28 | 2010-04-06 | Cummins Inc. | System and method for metering fuel in a high pressure pump system |
US7827971B2 (en) * | 2009-01-26 | 2010-11-09 | Gm Global Technology Operations, Inc. | Engine assembly with fuel filter gas removal apparatus |
DE102009027335A1 (en) * | 2009-06-30 | 2011-01-05 | Robert Bosch Gmbh | Fuel system for an internal combustion engine |
DE102010043439A1 (en) * | 2010-11-05 | 2012-05-10 | Robert Bosch Gmbh | Fuel injection system of an internal combustion engine |
DE102010043531A1 (en) * | 2010-11-08 | 2012-05-10 | Robert Bosch Gmbh | Fuel injection system of an internal combustion engine |
IT1403264B1 (en) * | 2010-12-16 | 2013-10-17 | Bosch Gmbh Robert | PUMPING GROUP FOR FOOD FUEL, PREFERIBLY GASOIL, FROM A CONTAINMENT TANK TO AN INTERNAL COMBUSTION ENGINE |
DE102010063398A1 (en) * | 2010-12-17 | 2012-06-21 | Robert Bosch Gmbh | Fuel conveying device for fuel injector of internal combustion engine, has pressure reduction device provided in form of venturi tube in by-pass pipe, where venturi tube is formed in hollow screw screwed into housing portion |
-
2013
- 2013-12-19 DE DE102013226649.9A patent/DE102013226649A1/en not_active Withdrawn
-
2014
- 2014-12-03 WO PCT/EP2014/076374 patent/WO2015090961A1/en active Application Filing
- 2014-12-03 EP EP14808944.4A patent/EP3084200B1/en active Active
- 2014-12-03 CN CN201480069867.0A patent/CN105829695B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN105829695B (en) | 2019-07-16 |
DE102013226649A1 (en) | 2015-06-25 |
CN105829695A (en) | 2016-08-03 |
WO2015090961A1 (en) | 2015-06-25 |
EP3084200B1 (en) | 2018-02-28 |
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