WO2017060074A1 - Kraftstoffhochdruckpumpe sowie kraftstoffversorgungseinrichtung für eine verbrennungskraftmaschine, insbesondere eines kraftwagens - Google Patents
Kraftstoffhochdruckpumpe sowie kraftstoffversorgungseinrichtung für eine verbrennungskraftmaschine, insbesondere eines kraftwagens Download PDFInfo
- Publication number
- WO2017060074A1 WO2017060074A1 PCT/EP2016/072283 EP2016072283W WO2017060074A1 WO 2017060074 A1 WO2017060074 A1 WO 2017060074A1 EP 2016072283 W EP2016072283 W EP 2016072283W WO 2017060074 A1 WO2017060074 A1 WO 2017060074A1
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- Prior art keywords
- pressure
- fuel
- low
- pump
- chamber
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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
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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
- 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
- F02M37/0017—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
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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
- 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
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
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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
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/025—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by a single piston
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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
- F02M59/442—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 preventing fuel leakage around pump plunger, e.g. fluid barriers
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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
- F02M59/48—Assembling; Disassembling; Replacing
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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
- 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
- F02M63/0265—Pumps feeding common rails
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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
- 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
- F02M63/0285—Arrangement of common rails having more than one common rail
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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
- 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
- F02M63/0285—Arrangement of common rails having more than one common rail
- F02M63/029—Arrangement of common rails having more than one common rail per cylinder bank, e.g. storing different fuels or fuels at different pressure levels per cylinder bank
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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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/046—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into both the combustion chamber and the intake conduit
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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
- F02D2041/3881—Common rail control systems with multiple common rails, e.g. one rail per cylinder bank, or a high pressure rail and a low pressure rail
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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
- F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
Definitions
- the invention relates to a high-pressure fuel pump for an internal combustion engine according to the preamble of patent ⁇ claim 1 and a fuel supply device according to the preamble of claim 12.
- the fuel supply means is for supplying the engine with fuel, in particular FLÜS ⁇ Sigem fuel.
- the fuel supply device comprises a first injection device for effecting a direct fuel injection. This means that the internal combustion engine has at least one combustion chamber, in which the fuel can be injected directly by means of the first injection device.
- the fuel supply device further includes a second injector provided in addition to the first injector for effecting a fuel rail injection.
- the fuel is introduced at a location arranged upstream of the combustion chamber in the internal combustion engine, in particular injected. This point is arranged, for example, in a suction pipe of the internal combustion engine, through which air can flow, and upstream of an intake valve of the internal combustion engine.
- the fuel supply device further comprises the aforementioned high-pressure fuel pump, by means of which the first Injection device with the fuel can be supplied. Furthermore, the fuel supply device comprises a low-pressure fuel pump for conveying the fuel to the high-pressure fuel pump ⁇ .
- the fuel is conveyed, for example, with a first pressure.
- a first pressure of the fuel which is conveyed by means of the low-pressure fuel pump, causes.
- the high-pressure fuel pump the fuel is conveyed, for example, with a second pressure higher than the first pressure.
- the high-pressure fuel pump for example, a second pressure of the fuel which is higher than the first pressure is effected.
- the high-pressure fuel pump has at least one first low-pressure connection, via which the high-pressure fuel pump, the fuel from the fuel low-pressure pump can be supplied.
- Fuel low-pressure pump funded fuel over the first low pressure port of the high- pressure fuel pump to ⁇ out.
- the high-pressure fuel pump further has at least one second low-pressure connection for guiding the means of the
- Fuel low-pressure pump pumped fuel from the high-pressure fuel pump away to the second injection in ⁇ direction on.
- the high-pressure fuel pump includes a pump housing ⁇ housing. Further comprising the high-pressure fuel pump we ⁇ tendonss into the pump housing at least partially on ⁇ ordered and movable relative to the pump housing För ⁇ derelement for conveying the fuel from the fuel ⁇ high-pressure pump to the first injector.
- the conveying element is designed for example as a piston, which is translationally movable relative to the pump housing.
- the high-pressure fuel pump to a Comp ⁇ ressionshunt whose volume is varied by moving the conveyor element.
- the Kompressi ⁇ onshunt is arranged in the pump housing.
- the För ⁇ derelements the fuel in the compression chamber is compressed or put under pressure.
- the high-pressure fuel pump comprises at least one low-pressure chamber, which at least a portion of the high-pressure fuel pump via the first low-pressure port to ⁇ guided fuel is supplied. In other words, at least a part of the fuel flowing through the first low pressure port can flow into the low pressure chamber.
- the high-pressure fuel pump has a arranged on a side facing away from the compression chamber of the conveying element and in its volume by moving the conveying element changeable collecting chamber for collecting fuel from the compression chamber.
- fuel can flow from the compression chamber into the catch chamber and is collected by means of the catch chamber whose volume is variable by moving the lift element.
- the collecting chamber is fluidically connected to the low-pressure chamber.
- WO 2012/004084 A1 discloses a fuel system for an internal combustion engine, with a low-pressure delivery device which promotes at least indirectly to at least one low-pressure injection device.
- the fuel system further includes a high pressure conveyor for the
- Fuel which has a drive region and a delivery region and promotes at least indirectly to at least one high-pressure injection device. It is provided that the fuel from the low pressure conveyor is first conveyed into the drive region of the high pressure conveyor and from there to the low pressure injector and / or to the delivery area of the high pressure conveyor.
- the object of the present invention is to provide a fuel ⁇ high-pressure pump and a fuel supply device of the aforementioned type further in such a way that a particularly advantageous supply of the internal combustion engine can be realized with fuel.
- fuel flows through the low-pressure chamber.
- the pump housing is a first component of the high-pressure fuel pump, wherein the high-pressure fuel pump comprises a separately formed from the pump housing and held on the pump housing, second component, which is formed for example as a cover of the high-pressure fuel pump.
- the two low ⁇ pressure connections are arranged on one of the components.
- the low-pressure connections are fluidically connected to one another via a connection region, wherein the connection region is disposed within one of the components.
- the connection region is arranged outside the components, whereby a favorable flow guidance of the fuel can be displayed. Due to the arrangement of the connection portion within a construction ⁇ elements for example, a path through which the fuel from the first low pressure port to the second low pressure port, and further flows to the second injection means be kept particularly low, whereby in particular an advantageous supply of the internal combustion engine with the fuel is representable.
- a further embodiment is characterized in that at least one flow dividing element is provided, by means of which the fuel flowing through the first low-pressure connection can be divided into a first partial flow and into a second partial flow.
- at least one of the partial flows flows from the first low-pressure connection while bypassing the collecting chamber to the second low-pressure connection and through the second low-pressure connection.
- the internal combustion engine in particular the second injection device, can be supplied with the fuel delivered by the low- pressure fuel pump at least substantially directly or over a particularly short path.
- the first partial flow flows from the first low-pressure connection, bypassing the collecting chamber, to the second low-pressure connection and flows through the second low-pressure connection, the second partial flow flowing from the first low-pressure connection to the collecting chamber, through the collecting chamber and then to the second low-pressure connection and flows through it.
- this makes it possible to supply the internal combustion engine, in particular the second injection device, with the first partial flow in a particularly advantageous manner.
- a particularly effective and efficient cooling of the high-pressure fuel pump can be realized so that an overflow Heat the high-pressure fuel pump can be avoided. Thereby, the supply of fuel to the internal combustion engine can be ensured, since the risk of failure of the high-pressure fuel pump can be kept particularly low.
- the flow dividing element is arranged at least partially outside the components and designed to divide the fuel into the substreams at at least one point located outside the components. This means that the fuel is already divided upstream of the components, so that ei ⁇ can be represented neflower an effective supply of Verbrennungskraftma ⁇ machine with the fuel and on the other hand an effective cooling of the high-pressure fuel pump. Overall, this can be ensured with the fuel supply to the combustion, an advantageous ⁇ combustion engine.
- a further embodiment is characterized in that the first low-pressure connection and / or the second low-pressure connection ⁇ is formed integrally with the one component, on which both low-pressure connections are arranged.
- the first low-pressure connection port and / or the second low pressure port by a separately formed from the one component and on which a device is formed on ⁇ parent component. This allows a simple and cost-effective production or assembly of the high-pressure fuel pump can be realized. Furthermore, the fuel can be guided particularly streamlined.
- the low-pressure connections are integrally formed with each other.
- the low-pressure connections are formed by separately formed and at least indirectly, in particular directly, interconnected components, whereby a particularly advantageous and streamlined guidance of the fuel, in particular by the high-pressure fuel pump, can be represented.
- the invention also includes a vehicle, especially a motor carriage ⁇ such as a passenger car, the vehicle having at least an inventive fuel high-pressure pump ⁇ and / or at least one inventive fuel fuel supply means.
- a vehicle especially a motor carriage ⁇ such as a passenger car
- the vehicle having at least an inventive fuel high-pressure pump ⁇ and / or at least one inventive fuel fuel supply means.
- Fig. 1 is a schematic sectional view of a high-pressure fuel pump according to a first embodiment of an internal combustion engine, wherein at least a portion of a first low pressure port of the high-pressure fuel pump flowing ⁇ fuel flows from the first low-pressure port, bypassing a collecting chamber to a second low pressure port of the high-pressure fuel pump and the second low pressure port flow through;
- FIG. 2 shows a schematic sectional view of the high-pressure fuel pump according to a second embodiment
- Figure 3 is a schematic sectional view of the fuel ⁇ high pressure pump according to a third embodiment.
- a schematic sectional view of the fuel ⁇ high-pressure pump according to a fourth embodiment a schematic sectional view of the fuel ⁇ high-pressure pump according to a fifth embodiment
- a schematic sectional view of the fuel ⁇ high-pressure pump according to a sixth embodiment a schematic sectional view of the fuel ⁇ high pressure pump according to a seven embodiment;
- Fig. 8 is a schematic representation of a fuel consumption sorgungs adopted for supplying an internal combustion engine of a motor vehicle with fuel, the fuel ersorgungs adopted the high-pressure fuel pump according to the first exporting ⁇ approximate shape comprises.
- FIG. 1 shows a schematic sectional view of a high-pressure fuel pump, denoted as a whole by 10, according to a first embodiment.
- the high-pressure fuel pump 10 is part of a fuel supply device designated as a whole by 12, by means of which an internal combustion engine can be supplied or supplied with fuel, in particular liquid fuel.
- the fuel can be, The ⁇ selkraftstoff or gasoline, for example.
- the Verbrennungskraftma ⁇ machine is used, for example, the driving of a motor vehicle, especially a passenger car, wherein the internal combustion engine can be configured as a reciprocating-piston internal combustion engine.
- the internal combustion engine has a plurality of internal ⁇ evacuate in the form of cylinders, wherein the fuel is supplied to the combustion chambers. Furthermore, air is supplied to the combustion chambers so that a fuel-air mixture is produced in the respective combustion chamber from the air and the fuel. The fuel ⁇ air-air mixture is burned, resulting in the exhaust gas of the internal combustion engine results.
- the respective combustion chamber is assigned at least one outlet channel, via which the exhaust gas can be removed from the combustion chamber.
- the outlet duct is assigned in the form of an exhaust valve of at least one gas exchange valve ⁇ , wherein said outlet valve between a closed position and at least one open position is movable. In the closed position, the outlet channel is fluidly blocked by means of the outlet valve, so that the exhaust gas can not flow from the combustion chamber into the outlet channel. In the open position, the exhaust valve releases the exhaust passage so that the exhaust gas can flow from the combustion chamber into the exhaust passage.
- At least one inlet channel is assigned to the respective combustion chamber, via which the air can be supplied to the combustion chamber.
- At least one gas exchange valve in the form of an inlet valve is associated with the inlet channel, which is adjustable between a closed position and at least one open position. In the closed position, the inlet channel is fluidly blocked by means of the inlet valve, so that the air can not flow from the inlet channel into the combustion chamber. In the open position, the inlet valve releases the inlet channel so that the air can flow through the inlet channel and flow from the inlet channel into the combustion chamber.
- the fuel supply device 12 comprises a first injection device 14, which is designed, for example, as a high-pressure injection device. Everybody is here
- the first injector 14 is designed to effect a direct fuel injection, wherein the direct fuel injection is also referred to as direct injection.
- the fuel is injected directly into the respective combustion chamber, in particular cylinder, by means of the respective injection valve 16.
- the first injector 14 includes an injection valves 16 the input common fuel distribution element 18, on which the injectors 16 are ver ⁇ sorgbar with the fuel.
- the fuel distribution element 18 is also referred to as rail, wherein the fuel distribution element 18 - when the first injector 14 is designed as a high-pressure injector - is referred to as a high-pressure rail.
- Injected combustion chambers wherein, for example, the fuel having this first pressure in the fuel distribution ⁇ element 18 can be received and the first pressure to the injection valves 16 can be fed.
- the fuel supply device 12 further includes a second injection device 20, which is provided in addition to the first injection device 14 and is designed, for example, as a low-pressure injection device.
- the second injection device 20 is designed to effect a fuel intake manifold injection, wherein the fuel intake manifold injection is also referred to as intake manifold injection.
- each combustion chamber is assigned at least one injection valve 22 of the second injection device 20.
- the combustion air is supplied to the combustion chambers via an intake tract of the internal combustion engine, for example, so that the air can flow through the intake tract.
- the intake tract comprises, for example, a suction tube, which is also referred to as a suction module, intake module or air distributor.
- the intake tract may comprise the intake passages.
- the point at which the fuel is injected by means of the respective injection valve 22 is arranged upstream of the combustion chamber and in particular in the intake tract. This point can be arranged, for example, in the suction pipe or in the inlet channel.
- the respective point at which the fuel can be injected by means of the respective injection valve 22 is arranged upstream of the respective inlet valve.
- the second injector 20 comprises an injection valves 22 the input common fuel distribution element 24, on which the injectors 22 are ver ⁇ sorgbar with the fuel.
- the fuel distribution element 24 is referred to as a rail. Since the second injection device 20 is designed, for example, as a low-pressure injection device, the fuel distribution element 24 is also referred to as a low-pressure rail.
- the fuel can be injected, for example, with a second pressure lower than the first pressure.
- the second pressure-containing fuel may be supplied to 22, for example in the fuel distribution element 24 is taken ⁇ or stored and to the second pressure injection valves the inlet.
- the fuel supply device 12 further comprises a tank 26, in which the particular liquid fuel is receivable.
- the high-pressure fuel pump 10 serves to supply the first injection device 14 with the fuel.
- the first injection device 14 is supplied with the fuel by means of the high-pressure fuel pump 10, the fuel being compressed or pressurized, for example by means of the high-pressure fuel pump 10, so that said first pressure of the fuel can be effected, for example by means of the high-pressure fuel pump 10 is or is effected.
- the fuel at the first pressure by means of the fuel high ⁇ pressure pump 10 is conveyed to the first injector 14.
- the fuel ersorgungs worn 12 further includes an additionally provided to the high-pressure fuel pump 10 power ⁇ material low-pressure pump 28 for conveying the fuel from the tank 26 to the high-pressure fuel pump 10.
- the fuel by means of the low-pressure fuel pump 28 is conveyed from the tank 26 to the high-pressure fuel pump 10 degrees.
- the third pressure corresponding to the second pressure, so that, for example, the second pressure of the fuel by means of the low-pressure fuel pump can be effected.
- the low-pressure fuel pump 28 may deliver the fuel at the second pressure.
- the high-pressure fuel pump 10 has a first low-pressure port 30, which comprises a first channel 32 through which the fuel can flow. Via the first low pressure port 30, the high fuel ⁇ pressure pump 10 is fluidly connected to the low-pressure fuel pump 28 so that the high-pressure fuel pump 10 or via the first low pressure port 30, especially over the first channel 32, which by means of the low-pressure fuel pump 28 ge ⁇ promoted fuel, in particular with the second . Third pressure, from the fuel low-pressure pump 28 is fed or is supplied. This feeding is illustrated in FIG. 1 by a directional arrow 34.
- the high-pressure fuel pump 10 further comprises at least one second low-pressure port 36, which is one of the
- Fuel flowable second channel 38 has.
- the second low-pressure connection 36 or the second channel 38 serves to guide the funded by the fuel low-pressure pump 28 and the high-pressure fuel pump 10 via the inlet (first low-pressure port 30) guided fuel, in particular with the second or third pressure, from the high-pressure fuel pump away to the second injection device 20, in particular to the fuel distribution element 24, so the fuel may be stored at the second and third pressures in the fuel distribution element 24, respectively. From Fig.
- the second injector 20, in particular the distribution of the fuel element 24, is connected fluidically via the second low pressure port 36 with the fuel ⁇ high-pressure pump 10, so that the fuel which is first passed through the inlet of the high-pressure fuel pump 10 intake, can be supplied via the second low pressure port 36 to the fuel distribution element 24 and is supplied.
- the third pressure and second pressure-containing fuel flows through the first low-pressure port 30 and the first channel 32.
- the fuel in the first low pressure port and in the first channel 32 for example, the induced by means of the fuel ⁇ low-pressure pump 38 third Pressure on, which may correspond to the second pressure.
- the fuel having the second pressure flows through the second low-pressure port 36 or the second passage 38.
- the fuel in the second low-pressure port 36 or in the second passage 38 has the second pressure.
- the high-pressure fuel pump 10 has a low-pressure chamber 40 which at least a part of the fuel ⁇ high-pressure pump 10 via the inlet (first low-pressure port 30), supplied fuel can flow through.
- the high-pressure fuel pump 10 comprises a first component in the form of a pump housing 42.
- the high-pressure fuel pump 10 includes a conveying element for conveying at least a portion of the high-pressure fuel pump 10 supplied via the feed fuel, said conveying element in the present case is designed as a piston 44.
- the piston 44 is also referred to as a delivery piston, wherein the piston 44 in this case has a first length region 46 and an adjoining second length region 48.
- the length region 46 has a first outer circumference, wherein the length region 48 has a smaller outer circumference than the first outer circumference.
- the length regions 46 and 48 are preferably formed integrally with each other. Since the length ranges have different outer circumferences, the piston 44 has a step.
- the piston 44 is thus formed as a stepped bolt.
- the length regions 46 and 48 have the same outer circumference, so that the piston 44 has no step.
- the piston 44 is at least partially disposed in the pump housing 42 and thereby movable relative to the pump housing 42, wherein the piston 44 in the present case translationally relative to the pump housing 42 is movable. This translational
- Mobility of the piston 44 relative to the pump housing 42 is illustrated in Fig. 1 by a double arrow 50.
- a compression chamber particularly shown schematically in Fig. 1 52 the force is high pressure fuel pump 10 is illustrated, wherein the Kompressi ⁇ onshunt 52 is disposed, for example, in the pump housing 42.
- the Kompressi ⁇ onshunt 52 is disposed, for example, in the pump housing 42.
- the high-pressure fuel pump 10 further comprises a second component in the form of a cover 54, which is formed separately from the pump housing 42 and connected to the pump housing 42 and held on the pump housing 42.
- a drive element is provided in the form of a particularly schematically illustrated in FIG. 1 cam 56, by means of which the piston 44 relative to the pump housing 42, present in Direction of the lid 54, is movable.
- the high-pressure fuel pump 10 comprises at least one spring element, not shown in FIG. 1, which is tensioned by moving the piston 44 in the direction of the cover 54.
- the piston 44 is moved back from the cover 54 in the direction of the cam 56 and in particular held in support with the cam 56 by the spring element relaxes.
- the piston 44 By moving the piston 44 in the direction of the cover 54, the volume of the compression chamber 52 is reduced, as a result of which the fuel received in the compartment chamber 52 is compressed or compressed.
- the volume of the compression chamber 52 is increased, thereby drawing fuel into the compression chamber 52.
- the compression chamber 52 is fluidically connectable or connected to the low-pressure chamber 40, so that fuel from the low-pressure chamber 40 can be sucked or sucked into the compression chamber 52 by means of the piston 44.
- the fuel sucked in from the low-pressure chamber 40 into the compression chamber 52 and thus flowing is at least part of the fuel supplied via the inlet of the high-pressure fuel pump 10, since at least part of the fuel supplied via the inlet of the high-pressure fuel pump 10 flows into the fuel
- Low-pressure chamber 40 flow and can be sucked from there by means of the piston 44 in the compression chamber 52.
- a fourth pressure of the fuel can be effected by means of the high-pressure fuel pump 10, wherein the fourth pressure is higher than the second and the third pressure.
- Example ⁇ example corresponds to the fourth pressure to the first pressure, so that the first injection means 14, in particular the fuel distribution element 18, can be supplied by means of the high-pressure fuel pump 10 to the first pressure and fourth pressure.
- the high-pressure fuel pump 10 comprises a high-pressure connection 58, not shown in FIG. 1, via which the fuel compressed or pressurized by means of the piston 44 from the compression chamber 52 of the first injection device 14, in particular the fuel distribution element 18, can be fed.
- the first injection device 14, in particular the fuel ⁇ distribution element 18, via the high pressure port 58 is fluidly connected to the high-pressure fuel pump 10.
- the fuel flows through the high pressure port 58 at the fourth pressure.
- the fuel in the high pressure port 58 has the fourth pressure, which is substantially higher than the second and third pressures.
- 1 shows a dotted line, by means of which a possible, first flow of at least part of the channel 32 and thus the first low pressure port 30 flowing through fuel from the first low pressure port 30 to the second Nie ⁇ derdruckan gleich 36 is illustrated.
- the fuel at least substantially flows directly from the first low-pressure port 30 to the second low-pressure port 36 and through the latter or through the second channel 38. In doing so, this first flow bypasses the pump housing 42. In other words, the first flow flows through it Pump housing 42 not.
- an injection valve 22 of the second injector 20 is associated, a plurality, of the internal space ⁇ arranged upstream of points provided at which fuel is injected by the second injector 20th
- This type of intake manifold injection is also referred to as multi-port injection (MPI), so that the second low-pressure connection 36 is also referred to as MPI connection.
- MPI multi-port injection
- the injection devices 14 and 20 in particular the first injection device 14, as needed.
- the fuel is injected by means of the injector 14 directly into the combustion chambers.
- the deactivated state of the injector 14 is omitted a direct, by the
- Injector 14 causes injection of the fuel into the combustion chambers.
- the high-pressure fuel pump 10 is supplied via the inlet of the fuel in the deactivated state of the injector 14, which has the third or second pressure lower than the fourth pressure or first pressure. Since the feed flowing through fuel is not compressed by the high-pressure fuel pump 10 and is not compressed by the high fuel ⁇ pressure pump 10, the the inlet through fuel flowing a low temperature, so that the force ⁇ high pressure fuel pump 10, for example also by means of the high-pressure fuel pump 10 supplied via the inlet
- Fuel is cooled when the injector 14 is deactivated. For this purpose, the fuel flows through the
- High-pressure fuel pump 10 whereby it is cooled.
- a chamber 62 is provided, which for example acts as a collecting chamber.
- the piston 44 is guided, for example, by means of a guide not visible in FIG.
- leakage fuel Due to leakage, fuel may flow from the compression chamber 52 between the piston and the guide, this fuel also being referred to as leakage fuel.
- the leakage fuel flows into the chamber 62 and is thus collected by means of the chamber 62.
- the chamber 62 is fluidically connected to the low-pressure chamber 40 via at least one connecting channel.
- the chamber 62 has a volume which is variable by moving the piston 44 relative to the pump housing 42. If the piston 44, in particular by means of the spring element of the cover 54 moves away, whereby the volume of the compression chamber 52 is increased, thereby the volume of the chamber 62 is reduced.
- Compression chamber 52 is reduced, so the volume of the chamber 62 is increased. As a result, for example, fuel is sucked from the low-pressure chamber 40 into the chamber 62 via the fluid connection mentioned. As already described above, at least part of the high-pressure fuel pump 10 supplied via the feed fuel can flow into the low-pressure chamber 40, since the inlet, in particular the first channel 32, is fluidically connected to the low-pressure chamber 40.
- Fuel is thus reciprocated by moving the piston 44 between the chamber 62 and the low pressure chamber 40.
- sucking fuel into the compression chamber 52 and / or into the chamber 62 as well as by pumping the fuel out of the compression chamber 52 and / or out of the chamber 62 pulsations of the fuel may occur.
- a damping device is arranged, by means of which the said pulsations of the fuel can be damped.
- the lid 54 for example, referred to as damper lid.
- the inlet and the MPI connection can also be reversed, so that, for example, the low-pressure connection 36 as an inlet and the low-pressure ⁇ connection 30 is designed as an MPI connection, so then ver for example by the directional arrows 34 and 60 ver ⁇ descriptive flow direction of the fuel reverses.
- both low-pressure connections 30 and 36 are arranged on one of the components. It can be seen from FIG. 1 that it is provided in the first embodiment that both low-pressure connections 30 and 36 are arranged on the cover 54. This means that both low-pressure connections 30 and 36 are held on the same component, in particular directly.
- the low-pressure connections 30 and 36, in particular the channels 32 and 38 are fluidically connected to one another via a connection region 64, which is arranged within one of the components. Via the connection region 64, the fuel can flow from the channel 32 into the channel 38.
- first low-pressure connection 30 is formed integrally with the cover 54.
- second low-pressure connection 36 is formed integrally with the cover 54.
- first low-pressure connection 30 is formed by a component, which is formed separately from the cover 54 and arranged on the cover 54, in particular held.
- second low pressure port 36 is through a separately formed from the cap 54 and arranged on the cover 54, in particular held, ge ⁇ forming component.
- the low ⁇ pressure ports 30 and 36 are integrally formed with each other.
- the low-pressure connections 30 and 36 are formed by separately formed and at least indirectly, in particular directly, interconnected components. The low pressure port 30 is along a through the
- Directional arrow 34 illustrated flow direction can be flowed through by the fuel. Furthermore, the low-pressure connection 36 can flow through the fuel along a second flow direction illustrated by the directional arrow 60, wherein the flow directions can run obliquely, parallel or perpendicular to one another.
- bypassing the catch chamber is to be understood as meaning that the portion of the fuel bypassing the chamber 62 does not flow through the chamber 62, but the portion at least substantially flows directly from the first low pressure port 30 the low-pressure chamber 40 to the low-pressure port 36 and then on to the second injection device 20.
- At least one flow of the fuel flowing through the first low-pressure port 30 is provided, with at least one flow flowing from the low-pressure port 30 through the low-pressure chamber 40 to the low-pressure port 36, bypassing the chamber 62, ie, bypassing it.
- the first embodiment it is provided that at least a predominant part of the first channel 32 flowing through the fuel from the first low pressure port 30 through the low pressure chamber 40 to the second Low pressure port 36 flows while bypassing the chamber 62.
- both low-pressure connections are arranged on the cover 54.
- the flow directions of the fuel flowing through the channels 32 and 38 at least substantially perpendicular to each other or enclose an angle of at least substantially 90 degrees.
- FIG. 2 shows a second embodiment of the high-pressure fuel pump 10.
- the second embodiment differs in particular from the first embodiment in that the flow directions of the fuel flowing through the channels 32 and 38 are substantially parallel to one another and thereby coincide.
- FIG 3 shows a third embodiment of the high-pressure fuel pump 10.
- the flow directions of the channels 32 and 38 through flowing fuel at least substantially perpendicular to the movement direction ⁇ tion of the piston 44, wherein the piston 44 along this direction of movement relative to the pump housing 42 is translationally movable.
- the respective flow directions of the fuel flowing through the channels 32 and 38 at least substantially parallel to the direction of movement of the piston 44, wherein both low-pressure ports 30 and 36 are arranged on the lid 54 in the third embodiment.
- FIG. 4 shows a fourth embodiment of the high-pressure fuel pump 10.
- both low-pressure connections 30 and 36 are arranged on the cover 54.
- FIG. 5 shows a fifth embodiment of the high-pressure fuel pump 10.
- the fifth embodiment differs in particular from the first, the second, the third and the fourth embodiment in that first low-pressure port 30 is arranged on a first of the components and in the present case on the cover 54 the second low-pressure connection 36 is arranged on a second of the components and in this case on the pump housing 42. Also in the fifth embodiment, it is provided that at least part of the fuel flows from the low pressure port 30 through the low pressure chamber 40 to the low pressure port 36, thereby bypassing the trap chamber 62.
- Fig. 6 shows a sixth embodiment of the fuel ⁇ high-pressure pump 10.
- the sixth embodiment it may as illustrated in a dotted by a line, the first flow coming. From FIG. 6, it can be seen that the first flow extends from the first low-pressure connection 30 to the second low-pressure connection 36, thereby bypassing the chamber 62 and passing through the low-pressure chamber 40, which is formed by the cover 54.
- the connection region 64 not shown in FIG. 6, is arranged outside the pump housing 42 and in the cover 54, in particular the low-pressure chamber 40.
- a second flow of the fuel illustrated by a solid line may occur.
- the second flow flows from the first low pressure port 30 to the second low pressure port 36 bypassing both the low pressure chamber 40 and the chamber 62, so that the second flow at least substantially directly, bypassing both the low pressure chamber 40 and the chamber 62 from the low pressure port 30 to the der horran gleich 36 flows.
- the connection region 64 is arranged, for example, in the pump housing 42 and outside the cover 54.
- At least one flow dividing element 66 is provided, by means of which the first low-pressure port 30, in particular the first channel 32, flowing through fuel in a first partial stream 68 and in a second partial stream 70 is divisible or divided.
- the first low-pressure connection 30 is formed by a component which is formed separately from the components and is presently arranged on the pump housing 42.
- the second partial stream 70 flows from the first low pressure port 30 to the chamber 62 through the And then through the low pressure chamber 40 and finally to the second low pressure port 36 and therethrough.
- the partial streams 68 and 70 which are separated from each other upstream or outside of the low pressure chamber 40 by means of the flow dividing element 66, in the low pressure chamber 40 upstream of the second channel 38 mix.
- the partial streams 68 and 70 mix, for example, in the pump housing 42, in particular directly in front of the MPI connection.
- the flow dividing element 66 is arranged outside the components and designed to divide the fuel at at least one point 72 arranged outside the components into the partial flows 68 and 70. This means that the fuel is located on the outside of the components Point 72 is divided into the partial streams 68 and 70 by means of the flow divider 66.
- the distribution of the On ⁇ fuel takes place in the partial streams 68 and 70 already upstream of the devices and more particularly upstream of the pump pen housing 42, ie, before the fuel in the pump housing 42 and the lid flows 54th
- the separation of the fuel in the formed, for example, as volume flows partial streams 68 and 70 thus takes place not in the pump housing 42, but outside this, the separation of the fuel in the partial streams 68 and 70 present in the first low pressure port 30 and in which the first low pressure port 30th forming component he ⁇ follows.
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 (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020187012205A KR102124268B1 (ko) | 2015-10-07 | 2016-09-20 | 자동차의 내연 엔진용 고압 연료 펌프 및 연료 공급 장치 |
| US15/766,186 US10808666B2 (en) | 2015-10-07 | 2016-09-20 | High-pressure fuel pump and fuel supply device for an internal combustion engine, in particular of a motor vehicle |
| JP2018518453A JP6602968B2 (ja) | 2015-10-07 | 2016-09-20 | 高圧燃料ポンプおよび内燃機関、特に自動車の内燃機関用の燃料供給装置 |
| CN201680059296.1A CN108138728B (zh) | 2015-10-07 | 2016-09-20 | 用于机动车辆的内燃发动机的高压燃料泵和燃料供应装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015219415.9A DE102015219415B4 (de) | 2015-10-07 | 2015-10-07 | Kraftstoffhochdruckpumpe sowie Kraftstoffversorgungseinrichtung für eine Verbrennungskraftmaschine, insbesondere eines Kraftwagens |
| DE102015219415.9 | 2015-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017060074A1 true WO2017060074A1 (de) | 2017-04-13 |
Family
ID=57113261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2016/072283 Ceased WO2017060074A1 (de) | 2015-10-07 | 2016-09-20 | Kraftstoffhochdruckpumpe sowie kraftstoffversorgungseinrichtung für eine verbrennungskraftmaschine, insbesondere eines kraftwagens |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10808666B2 (de) |
| JP (1) | JP6602968B2 (de) |
| KR (1) | KR102124268B1 (de) |
| CN (1) | CN108138728B (de) |
| DE (1) | DE102015219415B4 (de) |
| WO (1) | WO2017060074A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015219419B3 (de) | 2015-10-07 | 2017-02-23 | Continental Automotive Gmbh | Pumpeinrichtung sowie Kraftstoffversorgungseinrichtung für eine Verbrennungskraftmaschine und Mischeinrichtung, insbesondere für einen Kraftwagen |
| DE102018211237A1 (de) * | 2018-07-07 | 2020-01-09 | Robert Bosch Gmbh | Kraftstoffpumpe |
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2016
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102015219415A1 (de) | 2017-04-13 |
| CN108138728B (zh) | 2021-06-15 |
| CN108138728A (zh) | 2018-06-08 |
| KR20180054860A (ko) | 2018-05-24 |
| US10808666B2 (en) | 2020-10-20 |
| DE102015219415B4 (de) | 2020-07-09 |
| JP2018534466A (ja) | 2018-11-22 |
| JP6602968B2 (ja) | 2019-11-06 |
| KR102124268B1 (ko) | 2020-06-17 |
| US20180283336A1 (en) | 2018-10-04 |
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