CN102472219A - Fuel system for an internal combustion engine - Google Patents
Fuel system for an internal combustion engine Download PDFInfo
- Publication number
- CN102472219A CN102472219A CN2010800295281A CN201080029528A CN102472219A CN 102472219 A CN102472219 A CN 102472219A CN 2010800295281 A CN2010800295281 A CN 2010800295281A CN 201080029528 A CN201080029528 A CN 201080029528A CN 102472219 A CN102472219 A CN 102472219A
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- Prior art keywords
- pressure
- fuel
- fuel system
- pump
- transfer pump
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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
- F02M59/20—Varying fuel delivery in quantity or timing
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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
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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
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
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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
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
- F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
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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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device
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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
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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
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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
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/54—Arrangement of fuel pressure regulators
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- 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 fuel system (10) for an internal combustion engine (12) in particular of a motor vehicle, comprising a prefeed pump (26), a high pressure pump (30), a dosing device (36) hydraulically arranged between the prefeed pump (26) and the high pressure pump (30), and a zero feed line (38) for disposing of leakages of the dosing device (36). In the fuel system (10), suction means are arranged in the zero feed line (38), or on the downstream end thereof.
Description
Technical field
The present invention relates to a kind of according to the present invention the fuel system that is used for internal-combustion engine of preamble.
Background technique
DE 19926308A1 illustrates common rail fuel system, and wherein, transfer pump is delivered to high-pressure service pump with fuel from jar through fuel conduit.Between transfer pump and high-pressure service pump, dosing device is set, can influences the fuel quantity that arrives high-pressure service pump by this dosing device.Between the conveying chamber of dosing device and high-pressure service pump, tell zero delivery line, between this zero delivery line, be provided with zero and carry throttle valve.Through zero delivery line, yet the amount of leakage that when dosing device cuts out, flows to through this dosing device is derived.
Summary of the invention
Task of the present invention is, improves the efficient of fuel system.
The fuel system of the characteristic of this task through having claim 1 solves.Favourable expanded configuration is explained in the dependent claims.In addition, in the important characteristic specification and accompanying drawing below of the present invention, wherein, alone and be important with the characteristic of various combination for the present invention, not explanation at length to this.
The advantage of aspirator is that the pressure in zero delivery line or on its end descends; Make the cracking pressure of inlet valve of high-pressure service pump can keep low, this improved it efficient (cracking pressure of inlet valve must be higher than exist the highest with safety clearance and under the situation of considering to change working life always, be included in zero delivery line and in case of necessity the there exist zero carry the pressure reduction of the necessity on the throttle valve stress level).In addition, zero carries the diameter of throttle valve to keep relatively little, makes that under normal conveying situation only the fuel of relatively small amount is through zero delivery line " disappearance ".If must almost be applied by the prime transfer pump individually this necessary pressure, this has improved the conveying chamber of filling high-pressure service pump so, and has mainly improved the efficient when starting.
For the present invention especially advantageously, aspirator comprises Venturi nozzle.Zero delivery line preferably leads in the zone of Venturi nozzle, in zero delivery line, has minimum pressure.The parts that Venturi nozzle is constructed simply and do not had to move.Therefore it is cheap and in fact has wearing and tearing ground and work.Because in fuel system, almost exist always for the necessary fuel stream of Venturi nozzle operation, so need not be used for the additional drive unit of Venturi nozzle.
Especially advantageously, fuel system has the pressure regulator valve of the pressure that is used for being adjusted in the area of low pressure between prime transfer pump and high-pressure service pump, and Venturi nozzle is arranged in the outlet throttling pipeline of pressure regulator valve.If dosing device cuts out, so this pressure regulator valve is discharged especially many fuel usually.If because the amount of leakage maximum that the dosing device of cutting out derives through zero delivery line, the pumping power of Venturi nozzle is especially big definitely so thus.On the contrary, pumping power reduces when dosing device is opened.So the automatic adaptive demand of pumping power, this especially improves the efficient of fuel system.
The present invention also more effectively works, and leads to the pipeline that becomes a mandarin of prime transfer pump if wherein be provided with the discharge conduit of Venturi nozzle.Can leaked fuel be transported at once the inlet of prime transfer pump thus again, be used to drive internal-combustion engine in the fuel cycle or be used for lubricated and cooling drives and cooling chamber so that it is imported to again.
To this alternatively, the discharge conduit that wherein is provided with Venturi nozzle also can lead in the return line, and this return line is back in the fuel pot.This fuel that returns can cool off in fuel pot, and this makes the temperature saving of fuel system become easy.
In the mode of execution of variation of the present invention, Venturi nozzle also can be arranged in the inlet throttle pipeline of pressure regulator valve.If this pressure regulator valve should have a plurality of discharge conduits that are equipped with the different cracking pressure of pressure regulator valve, which discharge conduit just in time to activate the function of irrespectively guaranteeing Venturi nozzle with so.
This is replenished ground, and advantageously, the inlet throttle pipeline is the part of the lubricated and/or cooling line of high-pressure service pump, and pressure regulator valve has first cracking pressure, is connected with return line from this cracking pressure inlet throttle pipeline.Guarantee thus, for example through-flow with fuel and discharge zero conveying leakage effectively when engine starting under the low relatively pressure condition of Venturi nozzle in the area of low pressure.
In addition, advantageously, high-pressure service pump comprises that at least one is used to feed back the recirculation line that bearing is revealed, and in this recirculation line, is provided with the spring-loaded safety check towards the high-pressure service pump locking.This safety check causes, when starting, can set up fuel pressure quickly.
Also advantageously, be parallel to the prime transfer pump and be provided with spring-loaded safety check or pressure-limit valve, this safety check or pressure-limit valve are being opened on the direction of prime transfer pump inlet.At this, this safety check or pressure-limit valve have task, and for example (in prime transfer pump back at the upper reaches) protection prime transfer pump avoids overload when filter possibly stop up under the situation of the fuel filter that use to extrude side.Simultaneously, for example on the instrument panel of Motor Vehicle, provide warning signal, stop up or change filter so that filter is exempted for this failure condition.
In fuel system, for example repairing or safeguarding that the back is provided with manual pump for the filling fuel system.Therefore advantageously, be parallel to that the prime transfer pump is provided with spring-loaded safety check or pressure-limit valve is opened towards the direction of prime transfer pump inlet for this mode of execution.This valve representes that to the bypass of prime transfer pump fuel pumps through the prime transfer pump in order to fill not all thus when filling.
Description of drawings
Accompanying drawing is explained for example according to an embodiment of the invention below.Accompanying drawing illustrates:
Fuel system in Fig. 1 first mode of execution has zero delivery line, and this zero delivery line leads in Venturi nozzle in the discharge conduit of pressure regulator valve;
The sectional view of the Venturi nozzle of Fig. 2 Fig. 1;
Fuel system in Fig. 3 second mode of execution has zero delivery line, and this zero delivery line leads in Venturi nozzle in the inlet restriction pipeline of pressure regulator valve;
Fuel system in Fig. 4 the 3rd mode of execution has zero delivery line, and this zero delivery line leads in Venturi nozzle in the return line of pressure regulator valve;
The fuel system of Fig. 5 Fig. 1 with the safety check in circuit;
Fig. 6 Fig. 1 fuel system has being used for bearing with the high-pressure service pump of Fig. 1 and leaks and transfer out to the safety check of the pipeline of fuel pump deliver line; And
Fuel system in Fig. 7 the 4th mode of execution has fuel filter, and this fuel filter is arranged between the prime transfer pump and high-pressure service pump of Fig. 1.
Embodiment
Fig. 1 illustrates fuel system 10, and this fuel system design is used for the so-called common rail fuel system of internal-combustion engine 12.In order to drive internal-combustion engine 12; Fuel under high pressure is transported in the fuel distributor (rail altogether) 14 and in that storage; Wherein, fuel injection system 16 is connected on the fuel distributor 14, and fuel injection system under high pressure is ejected into fuel in the firing chamber 18 of internal-combustion engine 12.
At this, fuel is transferred out from the fuel pot 20 of Motor Vehicle.On flow direction, in fuel transport path 22,, fuel filter 24, throttle valve 25 and machinery or electrically driven (operated) prime transfer pump 26 are set from the fuel pot 20s.This fuel path at first leads in the driving or crank chamber 28 of high-pressure service pump 30 for lubricated driver part, and this high-pressure service pump preferable configuration is mechanically operated radial piston pump.The trend of the fuel in fuel system 10 is in the accompanying drawings with arrow labeled.
Flow of liquid at driving and crank chamber 28 fuel at the back is divided into two-part.First outlet of fuel is that to be used to drive 32, the second outlets of the driving pipeline of internal-combustion engine 12 be to be used for lubricated and cooling supply circuit 34 high-pressure service pump 30, fuel circuit.
Through supply circuit 34, the fuel that is arranged in driving and crank chamber 28 inputs to pressure regulator valve 52 through another fuel filter 50 on flow direction, and this pressure regulator valve is configured to spring-loaded piston valve with two stage of switches.Therefore supply circuit 34 is also represented the inlet throttle pipeline of pressure regulator valve 52.This regulating and controlling valve 52 also comprises three outlets except the inlet that is used for supply circuit 34.In first stage of switches; When that is to say the low fuel pressure in supply circuit 34; Fuel in return line 54 is transported in the fuel pot 20 through throttle valve 56; In second stage of switches when high fuel pressure (in supply circuit 34), fuel is transported in the through-flow pipeline 58, in this through-flow pipeline, Venturi nozzle 40 is set.This return line 54 and through-flow pipeline 58 are represented the discharge conduit of pressure regulator valves 52 thus.Through-flow pipeline 58 leads in the fuel pump deliver line 22.The piston valve of the 3rd outlet 60 in pressure regulator valve 52 of pressure regulator valve 52 only is used for pressure compensation when moving.Here also can occur leaking, this leaked fuel is transported in the return line 54 through throttle valve 62.
High-pressure service pump 30 has two supporting positions that are used to support eccentric running shaft usually.Also can occur leaking from these supporting positions.These two positions are expressed as throttle valve 63 in Fig. 1.The leakage at supporting position 63 is back to fuel pot 20 through return line 54.
Venturi nozzle 40 illustrates with sectional view in Fig. 2.It is made up of the pipe 64 of planomural on the outside, and this pipe has internal cross section D through the cone 66 of two relative orientations and 68 the portion that narrows down, and cone is adjoined guiding in the zone of its minimum diameter D.These two cones 66 and 68 have the cross section D of identical contraction and the identical cross section 3D that widens.At inner all seamed edges of pipe 64 according to the streamline rounding.The cross section 3D that widens approximately is 3 times of sizes of the cross section D of contraction.On flow direction 70, cone 66 has the length of the cross section D of about contraction; The length of cone 68 has the cross section D of contraction on flow direction 70 three to five times length is length 3-5D.Have in the zone of position of cross section D of contraction in pipe 64 inside, be provided with decline pipeline 72 perpendicular to pipe 64.The cross section of this decline pipeline 72 is littler basically and so definite size with respect to cross section D, makes it be expressed as the throttling cross section of zero conveying throttle valve.In the present invention, zero delivery line 38 is connected on this zero conveying throttle valve 72, is parts of through-flow pipeline 58 yet manage 64.Manufacturing technology ground, the passage in the housing of high-pressure service pump 30 has the Venturi nozzle 40 as the injection part.But this Venturi nozzle 40 also can alternatively be embodied as spiral release portion or be outside parts.
This Venturi nozzle 40 acts on when using in the present invention as follows:
If fuel flows through pipe 64, that is to say and flow through through-flow pipeline 58, so maximum and static pressure (static pressure) minimum of dynamic pressure (dynamic pressure) on the narrowest position D of pipe 64.The speed of the fuel that flows raises when the constriction of pipe 64 is through-flow with the ratio of cross section D: 3D, because the fuel of same amount is through-flow everywhere.Because also there is corresponding low pressure in the relatively little pressure in the zone of the narrowest position D on the mouth of zero conveying throttle valve 72.There is pressure difference between the starting point of the mouth of zero conveying throttle valve 72 in the inner room of Venturi nozzle 40 and zero delivery line 38 thus, from the zone between dosing device 36 and suction valve 44, passes through zero delivery line 38 sucking-offs through this pressure difference fuel.Therefore this Venturi nozzle 40 forms aspirator on the end in the downstream of zero delivery line 38.
Fuel aspirates through fuel pump deliver line 22 from fuel pot 20 through the pumping action of prime transfer pump 26.At this, fuel filters in fuel filter 24.Prime transfer pump 26 continues transported to fuel in the driving and crank chamber 28 of high-pressure service pump 30.In order to drive internal-combustion engine 12, through driving the dosing device 36 that pipeline 32 is delivered to unlatching, fuel arrives soon after in the conveying chamber 46 of high-pressure service pump 30 through suction valve 44 fuel afterwards from that.Be compressed and under high pressure import in the rail 14 of internal-combustion engine at that fuel through safety check 48.
When dosing device 36 cuts out (when slippage moves), whole fuel of being carried by prime transfer pump 26 are delivered to pressure regulator valve 52 from driving and crank chamber 28 through supply pipeline 34.Through the unnecessary pressure of fuel quantity rising in supply pipeline 34; Make pressure regulator valve 52 open so greatly, make fuel on the one hand be back to fuel pot 20 and be delivered to the inlet of prime transfer pump 26 on the other hand through the through-flow pipeline 58 that wherein is provided with Venturi nozzle 40 again through return line 54.Produce fuel cycle through the latter, this fuel cycle is used for lubricated and cooling drives and crank chamber 28 and be used to drive Venturi nozzle 40.
Because prime transfer pump 26 common delivery ratios are for the required more fuel of operation of combustion engine; Even so when dosing device 36 parts are opened; That is to say when internal-combustion engine 12 load operations; In supply pipeline 34, have certain fuel stream, however when this fuel stream move than slippage still less, make only partly unlatching of pressure regulator valve 52.Keep not receiving to influence here at the fuel quantity (going back) that flows through return line 54, and fuel stream through through-flow pipeline 58 still less, makes that the pumping power of Venturi nozzle 40 is also littler.
When internal-combustion engine 12 startings, the pressure regulator valve 52 that is spring loaded at first cuts out, and therefore when dosing device 36 is opened, can set up big as far as possible fuel pressure through driving pipeline 32.
If dosing device 36 cuts out when internal-combustion engine 12 slippages move, fuel leak is overflowed on dosing device 36 so.This leakage carries throttle valve 72 to input to Venturi nozzle 40 through zero delivery line 38 and zero.Because under the situation that dosing device 36 cuts out through-flow pipeline 58 have big through-flow, so bigger pumping action when partially or completely opening than dosage device appears in the ingress of the falling tube 72 in Venturi tube 64.Venturi nozzle 40 will leak the inlet that is transported to the prime transfer pump 26 the fuel pump deliver line 22 from zero delivery line 38 sucking-offs and with it and remaining fuel.
Fig. 3 illustrates second mode of execution of the present invention.For the accompanying drawing of Fig. 3 with all back, these have identical reference character and explanation no longer at length with respect to the element of the fuel system of Fig. 1 and the element of regional function equivalence with the zone.Difference with respect to Fig. 1 is in Venturi nozzle 40 layout aspects.This Venturi nozzle 40 is arranged in the supply pipeline 34 with Fig. 1 on the contrary, that is to say in the inlet throttle pipeline that is arranged on pressure regulator valve 52.The function of this mode of execution basically with Fig. 1 in the described function of mode of execution identical.Even this Venturi nozzle 40 work the time through inlet throttle pipeline 34 relatively little mobile.
Fig. 4 illustrates the 3rd mode of execution of the present invention.Significantly do not exist together here aspect Venturi nozzle 40 layouts with respect to Fig. 1 or Fig. 3 yet.This Venturi nozzle 40 is arranged in the return line 54 here.This Venturi nozzle 40 is with constant relatively pumping power work.
Fig. 5 illustrates the expansion with respect to Fig. 1.Here additionally in the return line 54 that the bearing of also deriving high-pressure service pump 30 leaks, be provided with towards the spring-loaded safety check 74 of high-pressure service pump 30 lockings.Can be quickly in fuel system 10 and more easily set up kinetic pressure through safety check 74.
Fig. 6 illustrates the modification of Fig. 5, and wherein, safety check 74 is arranged on the bearing leakage that is used for high-pressure service pump 30 and transfers out to the pipeline of fuel pump deliver line 22.Bearing earial drainage when safety check 74 also is used to limit the starting situation here.
Fig. 7 illustrates four embodiment of the invention and is the modification of Fig. 5.Yet this mode of execution also is transformed on the mode of execution of other descriptions.Significantly not existing together with respect to the mode of execution of present description is the position of fuel filter 24.At present fuel filter 24 is arranged on the suction side of prime transfer pump 26 always, and fuel filter 24 is arranged on the extrusion side of prime transfer pump 26 here.In this fuel system, in order to repair or to safeguard that the filling fuel optimum system choosing is provided with manual pump 76 afterwards.On flow direction, before and after manual pump, be provided with two safety check 77 towards fuel pot 20 lockings.Additionally, be parallel to prime transfer pump 26 and be provided with spring-loaded safety check of opening towards high-pressure service pump 26 78 and the spring-loaded safety check of on the direction that enters the mouth towards the prime transfer pump, opening 80.This safety check 78 is used as the bypass when filling fuel system 10, and fuel pumps through prime transfer pump 26 in order to fill not all thus.This safety check 80 when fuel filter 24 possibly stop up, protects prime transfer pump 26 to avoid overload and protection fuel filter 24 avoids infringement.Operation by using 40 pairs zero delivery lines 38 of Venturi nozzle is identical with aforesaid mode of execution.
Claims (10)
1. be used for the especially fuel system (10) of the internal-combustion engine of Motor Vehicle (12); Said fuel system has prime transfer pump (26), high-pressure service pump (30), hydraulically is arranged on the dosing device (36) between prime transfer pump (26) and the high-pressure service pump (30) and be used for the zero delivery line (38) that the leakage with said dosing device (36) transfers out; It is characterized in that, in said zero delivery line (38) or on the end in its downstream side, aspirator (40) is set.
2. according to the fuel system (10) of claim 1, it is characterized in that said aspirator comprises Venturi nozzle (40).
3. according to the fuel system (10) of claim 1 or 2; It is characterized in that; This fuel system has the pressure regulator valve (52) that is used for being adjusted in the pressure that is positioned at the area of low pressure between prime transfer pump (26) and the high-pressure service pump (30); Said Venturi nozzle (40) is arranged in the discharge conduit (54,58) of said pressure regulator valve (52).
4. according to the fuel system (10) of claim 3, it is characterized in that said discharge conduit (58) leads to one to the intake line (22) of said prime transfer pump (26).
5. according to the fuel system (10) of claim 3, it is characterized in that said discharge conduit leads in the return line (54).
6. according to the fuel system (10) of claim 1 or 2; It is characterized in that; Have the pressure regulator valve (52) that is used for being adjusted in the pressure that is positioned at the area of low pressure between prime transfer pump (26) and the high-pressure service pump (30), and said Venturi nozzle (40) is arranged in the inlet throttle pipeline (34) of said pressure regulator valve (26).
7. according to the fuel system (10) of claim 6; It is characterized in that; Said inlet throttle pipeline (34) is the part of the lubricated and/or cooling line of said high-pressure service pump (30); And said pressure regulator valve (52) has first cracking pressure, from the said pressure regulator valve of this cracking pressure said inlet throttle pipeline (34) is connected with return line (54).
8. the fuel system (10) that one of requires according to aforesaid right; It is characterized in that; Said high-pressure service pump (30) comprises that at least one is used to feed back the recirculation line (54) that bearing is revealed, and in said recirculation line (54), is provided with towards the spring-loaded safety check (74) of said high-pressure service pump (30) locking.
9. according to the fuel system (10) of one of aforesaid right requirement, it is characterized in that, be parallel to said prime transfer pump (26) and be provided with spring-loaded safety check or pressure-limit valve (80) that this safety check or pressure-limit valve are being opened on the direction of prime transfer pump inlet.
10. according to the fuel system (10) of one of aforesaid right requirement, it is characterized in that, be parallel to said prime transfer pump (26) and be provided with spring-loaded safety check or pressure-limit valve (78) that this safety check or pressure-limit valve are being opened on the direction of high-pressure service pump inlet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009027335A DE102009027335A1 (en) | 2009-06-30 | 2009-06-30 | Fuel system for an internal combustion engine |
| DE102009027335.2 | 2009-06-30 | ||
| PCT/EP2010/055891 WO2011000599A1 (en) | 2009-06-30 | 2010-04-30 | Fuel system for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102472219A true CN102472219A (en) | 2012-05-23 |
| CN102472219B CN102472219B (en) | 2015-06-17 |
Family
ID=42338242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080029528.1A Active CN102472219B (en) | 2009-06-30 | 2010-04-30 | Fuel system for an internal combustion engine |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2449245B1 (en) |
| JP (1) | JP5508526B2 (en) |
| KR (1) | KR101696498B1 (en) |
| CN (1) | CN102472219B (en) |
| DE (1) | DE102009027335A1 (en) |
| RU (1) | RU2556470C2 (en) |
| WO (1) | WO2011000599A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201496A (en) * | 2010-11-08 | 2013-07-10 | 罗伯特·博世有限公司 | Fuel injection system of an internal combustion engine |
| CN105332886A (en) * | 2014-06-26 | 2016-02-17 | 罗伯特·博世有限公司 | Pump component |
| CN105829695A (en) * | 2013-12-19 | 2016-08-03 | 罗伯特·博世有限公司 | Fuel supply device of a fuel injection system of an internal combustion engine, and overflow valve for the same |
| CN106286060A (en) * | 2015-06-25 | 2017-01-04 | 福特环球技术公司 | system and method for fuel injection |
| CN108150324A (en) * | 2017-12-27 | 2018-06-12 | 潍柴动力股份有限公司 | For the high-pressure oil pump and engine fuel oil system of engine fuel oil system |
| CN109642532A (en) * | 2016-08-26 | 2019-04-16 | 株式会社电装 | Overflow-valve device and high-pressure pump |
| CN110700969A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels and method for operating same |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012212062A1 (en) * | 2012-07-11 | 2014-01-16 | Robert Bosch Gmbh | Low pressure circuit for a fuel injection system, fuel injection system and method of operating a fuel injection system |
| DE102013208707A1 (en) * | 2013-05-13 | 2014-11-13 | Robert Bosch Gmbh | Overflow valve for a high pressure pump in a fuel injection system |
| DE102013212145A1 (en) * | 2013-06-25 | 2015-01-08 | Robert Bosch Gmbh | pump |
| US9638153B2 (en) * | 2015-02-20 | 2017-05-02 | Ford Global Technologies, Llc | Method for cooling a direct injection pump |
| GB2556078B (en) * | 2016-11-17 | 2020-02-26 | Delphi Tech Ip Ltd | Venturi flow circuit |
| DE102020114417A1 (en) * | 2020-05-29 | 2021-12-02 | Liebherr-Components Deggendorf Gmbh | high pressure pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2335237A (en) * | 1998-03-13 | 1999-09-15 | Bosch Gmbh Robert | A fuel supply arrangement |
| DE10154133C1 (en) * | 2001-11-03 | 2003-02-13 | Bosch Gmbh Robert | Common-rail fuel system for IC engine has fuel fed from between fuel metering device and high pressure fuel pump fed to low pressure region with pressure reduction device |
| EP1457667A1 (en) * | 2003-03-11 | 2004-09-15 | Denso Corporation | Fuel supply pump which is lubricated by the fuel |
| CN1538053A (en) * | 2003-04-15 | 2004-10-20 | ��ʽ�����װ | High-pressure fuel supply devcie |
| US20080156295A1 (en) * | 2006-12-27 | 2008-07-03 | Denso Corporation | Fuel feed apparatus and accumulator fuel injection system having the same |
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| SU1093573A1 (en) * | 1983-02-23 | 1984-05-23 | Sheremet Pavel Z | Diesel engine fuel feed system |
| DE19926308A1 (en) | 1999-06-09 | 2000-12-21 | Bosch Gmbh Robert | Pump assembly for fuel |
| DE102006031685B4 (en) * | 2005-08-11 | 2017-10-05 | Andreas Stihl Ag & Co. Kg | Internal combustion engine and method for its operation |
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2009
- 2009-06-30 DE DE102009027335A patent/DE102009027335A1/en not_active Withdrawn
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2010
- 2010-04-30 RU RU2012103044/06A patent/RU2556470C2/en active
- 2010-04-30 WO PCT/EP2010/055891 patent/WO2011000599A1/en active Application Filing
- 2010-04-30 CN CN201080029528.1A patent/CN102472219B/en active Active
- 2010-04-30 JP JP2012518051A patent/JP5508526B2/en active Active
- 2010-04-30 EP EP10718151.3A patent/EP2449245B1/en active Active
- 2010-04-30 KR KR1020117031434A patent/KR101696498B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2335237A (en) * | 1998-03-13 | 1999-09-15 | Bosch Gmbh Robert | A fuel supply arrangement |
| DE10154133C1 (en) * | 2001-11-03 | 2003-02-13 | Bosch Gmbh Robert | Common-rail fuel system for IC engine has fuel fed from between fuel metering device and high pressure fuel pump fed to low pressure region with pressure reduction device |
| EP1457667A1 (en) * | 2003-03-11 | 2004-09-15 | Denso Corporation | Fuel supply pump which is lubricated by the fuel |
| CN1538053A (en) * | 2003-04-15 | 2004-10-20 | ��ʽ�����װ | High-pressure fuel supply devcie |
| US20080156295A1 (en) * | 2006-12-27 | 2008-07-03 | Denso Corporation | Fuel feed apparatus and accumulator fuel injection system having the same |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201496A (en) * | 2010-11-08 | 2013-07-10 | 罗伯特·博世有限公司 | Fuel injection system of an internal combustion engine |
| CN103201496B (en) * | 2010-11-08 | 2016-07-13 | 罗伯特·博世有限公司 | The fuel injection system of internal combustion engine |
| CN105829695A (en) * | 2013-12-19 | 2016-08-03 | 罗伯特·博世有限公司 | Fuel supply device of a fuel injection system of an internal combustion engine, and overflow valve for the same |
| CN105829695B (en) * | 2013-12-19 | 2019-07-16 | 罗伯特·博世有限公司 | The fuel supply device of fuel injection system for IC engine and overflow valve for this |
| CN105332886A (en) * | 2014-06-26 | 2016-02-17 | 罗伯特·博世有限公司 | Pump component |
| CN106286060A (en) * | 2015-06-25 | 2017-01-04 | 福特环球技术公司 | system and method for fuel injection |
| CN106286060B (en) * | 2015-06-25 | 2020-12-25 | 福特环球技术公司 | Method for fuel injection |
| CN109642532A (en) * | 2016-08-26 | 2019-04-16 | 株式会社电装 | Overflow-valve device and high-pressure pump |
| CN108150324A (en) * | 2017-12-27 | 2018-06-12 | 潍柴动力股份有限公司 | For the high-pressure oil pump and engine fuel oil system of engine fuel oil system |
| CN108150324B (en) * | 2017-12-27 | 2020-01-03 | 潍柴动力股份有限公司 | High-pressure oil pump for engine fuel system and engine fuel system |
| CN110700969A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels and method for operating same |
| CN110700969B (en) * | 2018-07-10 | 2022-06-28 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels and method for operating same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009027335A1 (en) | 2011-01-05 |
| WO2011000599A1 (en) | 2011-01-06 |
| JP5508526B2 (en) | 2014-06-04 |
| KR20120029445A (en) | 2012-03-26 |
| CN102472219B (en) | 2015-06-17 |
| EP2449245A1 (en) | 2012-05-09 |
| KR101696498B1 (en) | 2017-01-13 |
| JP2012531557A (en) | 2012-12-10 |
| RU2012103044A (en) | 2013-08-27 |
| RU2556470C2 (en) | 2015-07-10 |
| EP2449245B1 (en) | 2013-08-14 |
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