EP3798439A1 - Dispositif d'alimentation en carburant - Google Patents

Dispositif d'alimentation en carburant Download PDF

Info

Publication number
EP3798439A1
EP3798439A1 EP20193772.9A EP20193772A EP3798439A1 EP 3798439 A1 EP3798439 A1 EP 3798439A1 EP 20193772 A EP20193772 A EP 20193772A EP 3798439 A1 EP3798439 A1 EP 3798439A1
Authority
EP
European Patent Office
Prior art keywords
valve
supply device
fuel
fuel supply
annular gap
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.)
Pending
Application number
EP20193772.9A
Other languages
German (de)
English (en)
Inventor
Gerhard Osburg
Dimitrios Galagas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Publication of EP3798439A1 publication Critical patent/EP3798439A1/fr
Pending legal-status Critical Current

Links

Images

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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/02—Metering-orifices, e.g. variable in diameter
    • F02M19/021—Metering-orifices, e.g. variable in diameter the cross-sectional area being changed mechanically
    • 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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02—Floatless carburettors
    • F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
    • 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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • 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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/16—Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation
    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/03—Fuel atomising nozzles; Arrangement of emulsifying air conduits
    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/06—Other details of fuel conduits
    • F02M19/066—Built-in cleaning elements, e.g. filters
    • 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
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/06—Means for enriching charge on sudden air throttle opening, i.e. at acceleration, e.g. storage means in passage way system
    • F02M7/08—Means for enriching charge on sudden air throttle opening, i.e. at acceleration, e.g. storage means in passage way system using pumps
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus

Definitions

  • the invention relates to a fuel supply device of the type specified in the preamble of claim 1.
  • the invention is based on the object of specifying a fuel supply device with which functional impairments of an internal combustion engine are avoided.
  • annular gap is formed in the fuel channel in which the valve is arranged, the gap width of the annular gap being matched to the stroke of the valve plate of the valve in such a way that the gap width is not greater than twice the stroke.
  • the flow cross-section of the annular gap is larger than the flow cross-section of the valve.
  • the flow cross-sections are advantageously surface cross-sections.
  • the annular gap is advantageously not limited by the valve plate of the valve.
  • the annular gap is in particular formed separately from the valve plate of the valve.
  • the annular gap is advantageously formed at a distance from the valve plate.
  • the annular gap By coordinating the gap width of the annular gap with the stroke of the valve plate, the annular gap retains dirt such as chips or the like and thus ensures that the valve plate can reach the closed position. It has been shown that a gap width that is not greater than twice the stroke of the valve plate can largely avoid blocking or hindering the movement of the valve plate.
  • the flow cross-section of the annular gap is larger than the flow cross-section of the valve. As a result, the annular gap does not significantly limit the flow rate through the fuel channel.
  • the gap width of the annular gap is advantageously fixed structurally.
  • the gap width of the annular gap is preferably not changeable or adjustable.
  • the gap width is preferably not greater than the stroke. Only dirt that is no greater than the stroke of the valve plate can pass through the annular gap. However, this contamination is not retained on the valve plate due to the sufficiently large stroke of the valve plate and can pass through the valve plate during operation. This prevents the movement of the valve plate from being blocked or hindered by dirt.
  • the valve can be, for example, the valve of a fuel nozzle or a valve in a pump of the fuel supply device. It can be provided that the valve is a check valve or an electromagnetic valve with a valve plate. In the check valve, the valve plate moves between the open position and the closed position due to the pressure conditions on the valve plate. In the case of an electromagnetic valve, the valve plate is moved by an electromagnet as a function of the current flow.
  • the gap width of the annular gap is preferably smaller than the stroke of the valve plate.
  • the gap width is particularly preferably at most 80% of the stroke. This can reliably prevent contamination from reaching the valve through the annular gap, which can become trapped between the valve plate and the stop and thus prevent the valve from closing. Contamination that is smaller than the valve lift can pass between the valve plate and the stop and is washed away by the fuel, so that this contamination does not have any functional impairment.
  • the open position of the valve is in particular a position in which the valve plate rests against a stop.
  • the stop and the valve seat thereby mechanically define the two end positions of the valve plate.
  • At least one annular gap is advantageously arranged upstream of the valve.
  • the term “upstream” refers to a direction of flow from a fuel tank to an internal combustion engine, that is to say the usual direction of flow when the fuel supply device is in operation. It can also be provided that, additionally or alternatively, at least one annular gap is arranged downstream of the valve. An annular gap arranged downstream of the valve prevents contamination from reaching the valve in the event of back pulsations in the fuel system. This can be the case, for example, when the internal combustion engine is pivoted in operation, for example in a hand-held tool, or when the internal combustion engine is switched off and fuel flows back to the fuel tank.
  • the annular gap is advantageously delimited by an inner wall and an outer wall.
  • a simple structure of the fuel supply device results when the valve seat and the inner wall of the annular gap are formed on the same component. As a result, no additional components are required for the formation of the annular gap.
  • a main fuel nozzle which has a valve, advantageously opens into the intake duct section.
  • the main fuel nozzle is the nozzle through which the main part of the fuel is supplied when an internal combustion engine is at full load.
  • the main fuel nozzle is advantageously arranged in a bore of the fuel supply device.
  • the main fuel nozzle is advantageously pressed into a bore in the fuel supply device.
  • it can also be provided that the main fuel nozzle is screwed into the bore or is held in the bore by means of an elastic element, for example by means of an O-ring.
  • a simple structure results when the annular gap is formed between the wall of the bore and the outer circumference of the main fuel nozzle. For the formation of the annular gap are thereby no additional components required.
  • the annular gap particularly preferably runs between a first annular channel and a second annular channel.
  • the fuel can be supplied and removed via the two ring channels.
  • the first annular channel, the annular gap and the second annular channel are advantageously delimited by the wall of the bore and the outer circumference of the main fuel nozzle.
  • At least one throttle is advantageously arranged upstream of the annular gap.
  • the throttle can be a fixed throttle.
  • the throttle is in particular a part-load fixed nozzle. It can also be provided that the at least one throttle is adjustable.
  • An adjustable throttle can in particular be a full-load adjusting screw if the valve is formed on a main fuel nozzle.
  • the flow cross section of the annular gap is advantageously larger than the flow cross section of the throttle. As a result, the annular gap does not limit the flow.
  • at least one adjustable throttle and at least one fixed throttle are provided.
  • the fuel supply device advantageously has a purger as a manually operated fuel pump.
  • the purger has a pump chamber.
  • a first valve is advantageously arranged upstream of the pump chamber and a second valve is arranged downstream of the pump chamber.
  • An annular gap is also advantageous for valves on a purger in order to ensure that the valve plate opens and closes reliably and is not hindered in its movement by contamination. This can ensure the long-term function of the purger.
  • the fuel system is safely flooded when the purger is actuated, so that a good start-up behavior of an internal combustion engine operated with the fuel supply device results.
  • Fig. 1 shows schematically a fuel supply device 1 in a sectional illustration.
  • the fuel supply device 1 in Fig. 1 In the exemplary embodiment, a carburetor is a fuel supply device in which the fuel is sucked in due to negative pressure.
  • a fuel supply device with a fuel valve which conveys the fuel under pressure and thereby injects it into the intake duct, can also be provided.
  • the fuel supply device 1 has a housing 2 in which an intake channel section 3 is formed.
  • the intake duct section 3 is advantageously connected to the mixture inlet of an internal combustion engine (not shown). Combustion air is usually sucked into the intake duct section 3 via an air filter.
  • a choke element 4 is arranged in the intake duct section 3 upstream of the throttle element 7. It can also be provided that the fuel supply device 1 does not have a choke element 4.
  • the choke element 4 is a choke flap which is mounted pivotably about an axis of rotation 6 with a choke shaft 5. The throttle element 7 and the choke element 4 serves to control the free flow cross section of the intake channel section 3.
  • the fuel feed device 1 is provided to feed both the fuel / air mixture into a mixture duct and air into an air duct.
  • the intake duct section 3 is divided by a partition section 10 into a mixture duct section 51 and an air duct section 52. If the choke element 4 and the throttle element 7 are completely open, they are in one plane with the partition section 10. As a result, a substantial separation of the mixture duct section 51 and the air duct section 52 is achieved.
  • the secondary fuel openings 12 are arranged in the area of the throttle element 7.
  • the main fuel opening 11 is arranged in the region of the partition wall section 10 and upstream of the throttle element 7.
  • the fuel supply device 1 is designed as a membrane carburetor to which fuel is supplied via a fuel pump 16.
  • the fuel pump 16 is preferably driven by the fluctuating pressure in a crankcase of an internal combustion engine.
  • the fuel pump 16 delivers the fuel via a fuel valve (not shown) into a control chamber 17 of the fuel supply device 1.
  • the control chamber 17 is separated from a compensation chamber 19 by a control diaphragm 18.
  • an inlet valve in the control chamber 17 is opened or closed in a known manner so that fuel can flow into the control chamber 17 in a controlled manner.
  • the secondary fuel openings 12 are fed by an idle chamber 53 which is connected to the control chamber 17 via an idle check valve 54 and an idle throttle 55.
  • the main fuel opening 11 is formed on a main fuel nozzle 13, which is connected to the control chamber 17 via a fuel channel 28 shown schematically with a dashed line.
  • a throttle 45 is arranged in the fuel channel 28.
  • the throttle 45 can be a fixed throttle, for example a part-load fixed nozzle.
  • the throttle 45 can also be adjustable.
  • the throttle 45 can in particular be an adjusting screw.
  • a fixed throttle and an adjustable throttle can be provided instead of the throttle 45.
  • the main fuel nozzle 13 is arranged in a bore 14 of the housing 2.
  • the fuel channel 56 opens out at the circumference of the bore 14.
  • the main fuel opening 11 opens into the intake channel section 3 in the region of a venturi 15.
  • the main fuel nozzle 13 has a valve 25 which is designed as a check valve.
  • the valve 25 comprises a valve plate 31.
  • the valve plate 31 is located in FIG Fig. 1 closed position 41 shown on a valve seat 34. In the open position, the valve plate 31 rests against a stop 37 in the exemplary embodiment.
  • the fuel supply device 1 has a purger 20.
  • the purger 20 is a manually operated fuel pump that delivers fuel from the control chamber 17 into a fuel tank.
  • the negative pressure generated in this way in the fuel system has the effect that fuel is sucked from the fuel tank into the fuel system and the fuel system is flooded as a result. Air present in the fuel system is returned to the fuel tank.
  • the purger 20 has a purger bellows 21 which is to be pressed by the operator in order to deliver fuel.
  • a pump chamber 22 is formed in the purger bellows 21.
  • a fuel channel 26 opens into the pump chamber 22 via a valve 23.
  • the fuel channel 26 connects the pump chamber 22 with the control chamber 17.
  • the valves 23 and 24 are designed as check valves in the exemplary embodiment.
  • the valve 23 comprises a valve plate 29.
  • the valve plate 29 is between the in Fig. 1 shown closed position 41 and an open position movable. In the closed position 41, the valve plate 29 rests against a valve seat 32 and thereby separates the fuel channel 26 from the pump chamber 22.
  • the valve plate 29 is supported by a spring 57, which in the exemplary embodiment is designed as a compression spring, in the direction of the valve seat 32, that is to say towards the closed position 41, biased. If a negative pressure arises in the pump chamber 22, the valve plate 29 is thereby lifted off the valve seat 32 after the force applied by the spring 57 is exceeded.
  • a stop 35 for the valve plate 29 is formed, which defines the open position of the valve 23 and limits the stroke of the valve plate 32.
  • the block length of the spring 57 can also form a stop for the valve plate 29.
  • the forces acting on the valve plate 29 during operation can also define the open position of the valve 23.
  • the valve 24, which leads from the pump chamber 22 into the fuel channel 27, has a valve plate 30, which is shown in FIG Fig. 1 closed position 41 shown rests against a valve seat 33.
  • the valve plate 30 is pretensioned by a spring 58, in the exemplary embodiment a compression spring, in the direction of the closed position 41.
  • a stop 36, which limits the maximum stroke of the valve plate 30, is formed in the housing 2.
  • the block length of the spring 58 can limit the stroke of the valve plate 30.
  • annular gap 38 is arranged in front of the valve 23 in the direction of flow from the control chamber 15 to the pump chamber 22.
  • the annular gap 38 is at a distance from the valve plate 29 of the valve 23 in the direction of flow.
  • annular gap 39 is arranged in front of the valve 24.
  • the annular gap 39 is at a distance from the valve plate 30 of the valve 24 in the direction of flow.
  • annular gap 40 is arranged upstream of the valve 25 in the direction of flow.
  • the annular gap 40 is at a distance from the valve plate 31 of the valve 25 in the direction of flow.
  • the annular gaps 38, 39 and 40 are each formed separately from the valve plate 29, 30, 31.
  • the annular gaps 38, 39 and 40 do not extend along the outer circumference of a valve plate 29, 30 or 31.
  • the annular gaps 38, 39 and 40 are each arranged at a distance from the valve plates 29, 30, 31.
  • Fig. 2 the main fuel nozzle 13 is shown schematically enlarged.
  • the valve 25 is in its open position 42.
  • the valve plate 31 has opposite the in Fig. 1 closed position 41 shown covered a stroke a.
  • the valve plate 31 rests against the stop 37.
  • the valve plate 31 is located at a distance from the valve seat 34, which corresponds to the stroke a.
  • the stroke a can be, for example, from 0.05 mm to 1 mm.
  • the main fuel nozzle 13 has a base body 50 which has a substantially cylindrical shape.
  • the base body 50 is pressed into the bore 14 of the housing 2.
  • the base body 50 can also be screwed into the bore 50 or held in the bore 50 by means of an elastic element such as an O-ring or the like.
  • the throttle 45 is shown schematically as an adjustable throttle with a valve needle 46.
  • the fuel channel 28 opens into a first annular channel 43 which is formed between the base body 50 of the main fuel nozzle 13 and the wall of the bore 14.
  • the first annular channel 43 is formed by a circumferential groove on the base body 50.
  • a second ring channel 44 is arranged at a distance from the first ring channel 43 and is also delimited by the base body 50 and the wall of the bore 14.
  • the second annular channel 44 is also formed by a circumferential groove on the outer circumference of the base body 50.
  • the annular gap 40 extends between the annular channels 43 and 44.
  • the annular gap 40 is delimited by an inner wall 47 and an outer wall 48.
  • the inner wall 47 is formed by the outer circumference of the base body 50.
  • the outer wall 48 is the wall of the bore 14.
  • the inner wall 47 can be formed by a thickening injection molded onto the base body 50. It can also be provided that the inner wall 47 is formed by the outer circumference of a ring 60 held on the base body 50. This is in Fig. 2 indicated schematically with a dashed line.
  • the annular gap 40 has a gap width b which is matched to the stroke a of the valve 25.
  • the gap width b corresponds to the distance between the inner wall 47 and the outer wall 48.
  • the gap width b is not greater than twice the stroke a.
  • the gap width b is in particular not greater than the stroke a.
  • the gap width b is advantageously smaller than the stroke a.
  • the gap width b is preferably at most 80% of the stroke a.
  • the gap width b is advantageously at least 30%, in particular at least 50% of the stroke a. This simplifies production.
  • the gap width b can be, for example, from 0.04 mm to 2 mm, in particular 0.04 mm to 1.6 mm, advantageously 0.05 mm to 1.5 mm.
  • the stroke a can be, for example, from 0.05 mm to 1.0 mm.
  • the chips that usually occur are usually significantly larger than the gap width b, see above that a gap width b, which is greater than the stroke a, can largely hold back the chips that occur.
  • the gap width b is structurally fixed.
  • the gap width b is not adjustable and cannot be changed by the user.
  • the flow cross section of the annular gap 40 is larger than the flow cross section of the valve 25. As a result, the annular gap 40 does not have a limiting effect on the flow throughput.
  • the flow cross-section of the annular gap 40 is advantageously larger than the flow cross-section of the throttle 45. If the throttle 45 is adjustable, the flow cross-section of the annular gap 40 is preferably larger than the largest flow cross-section that can be set with the throttle 45.
  • the annular gap 40 has a gap length c.
  • the gap length c is advantageously comparatively small.
  • the gap length c is advantageously less than half the gap width b.
  • the gap length c is advantageously 0.02 mm to 1.5 mm, in particular 0.02 mm to 1.0 mm, preferably 0.1 mm to 0.5 mm.
  • valve plate 31 is in its closed position 41 ( Fig. 1 ) on the valve seat 34 over a valve seat width d.
  • valve seat width d is the difference between the valve seat outer radius and the valve seat inner radius.
  • the gap length c is advantageously less than twice the width d.
  • the gap length c is advantageously less than twice the valve plate thickness e.
  • the gap width of the annular gaps 38 and 39 ( Fig. 1 ) is matched in a corresponding manner to the stroke of the valve plates 29 and 30 of the valves 23 and 24 of the purger 20.
  • Fig. 3 shows an embodiment of a valve 24 of the purger 20, in which an annular gap 39 is arranged upstream of the valve 24 in the direction of flow.
  • a second annular gap 49 is arranged after the valve 24 in the direction of flow.
  • the annular gap 49 protects the valve 24 from contamination which reaches the valve 24 when there is a flow in the opposite direction. This can be the case, for example, when the internal combustion engine is switched off, when fuel that is still in the fuel system drains back into the fuel tank.
  • the annular gaps 39 and 49 are formed on insert parts 59 which are inserted into the fuel channel 27 upstream and downstream of the valve 24.
  • the check valve and the annular gap 40 are formed on separate components.
  • the check valve is formed on the base body 50.
  • the annular gap 40 is delimited by a component 61.
  • the component 61 is pressed into the bore 14 separately from the base body 50.
  • the component 61 has the first annular channel 43 into which the fuel channel 28 opens.
  • the inner wall 47 delimiting the annular gap 40 is also formed on the component 61.
  • the Figures 5 to 7 show different design variants for the annular gap 40.
  • the annular gaps 38, 39 and 49 can be designed in a corresponding manner.
  • the inner wall 47 is formed with an outwardly tapering cross section, in particular with a triangular cross section.
  • the gap length c is thereby minimized.
  • the outer wall 48 is cylindrical.
  • inner wall 47 and outer wall 48 are formed with a tapering, in particular tapering, cross section.
  • the inner wall 47 is formed with a tapering cross section.
  • the inner wall 47 does not taper to a point, but has a rounded design.
  • the outer wall 48 is cylindrical.
  • the flow cross-sections are advantageously surface cross-sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20193772.9A 2019-09-30 2020-09-01 Dispositif d'alimentation en carburant Pending EP3798439A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19200476 2019-09-30

Publications (1)

Publication Number Publication Date
EP3798439A1 true EP3798439A1 (fr) 2021-03-31

Family

ID=68104462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20193772.9A Pending EP3798439A1 (fr) 2019-09-30 2020-09-01 Dispositif d'alimentation en carburant

Country Status (3)

Country Link
US (1) US11391248B2 (fr)
EP (1) EP3798439A1 (fr)
CN (1) CN112576415A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4119782A1 (fr) * 2021-07-15 2023-01-18 Andreas Stihl AG & Co. KG Dispositif d'alimentation en carburant et moteur à deux temps doté d'un dispositif d'alimentation en carburant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57198357A (en) * 1981-05-29 1982-12-04 Hitachi Ltd Carburetor
DE29722869U1 (de) 1997-12-24 1998-02-19 Fa. Andreas Stihl, 71336 Waiblingen Membranvergaser für ein tragbares, handgeführtes Arbeitsgerät
DE10142247A1 (de) * 2000-08-29 2002-03-14 Walbro Corp Modular aufgebauter Membranvergaser
US20080061454A1 (en) * 2006-09-08 2008-03-13 Walbro Engine Management, L.L.C. Auxiliary fuel and air supply in a carburetor
CN202690251U (zh) 2012-07-10 2013-01-23 陈俭敏 一种化油器及其进油系统
US20140306358A1 (en) * 2013-04-15 2014-10-16 Walbro Engine Management, L.L.C. Accelerator device for a carburetor

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH216500A (de) * 1938-02-21 1941-08-31 Montan Export Nv Verfahren zur Regelung der Brennstoffmenge und zur Aufbereitung flüssigen Brennstoffes in Vergasern für Verbrennungsmotoren, sowie Spritzvergaser zur Durchführung dieses Verfahrens.
EP0786591A3 (fr) * 1996-01-29 1997-08-13 WCI OUTDOOR PRODUCTS, Inc. Système d'alimentation de carburant de démarrage rapide pour moteur à combustion interne
JPH10110652A (ja) * 1996-10-03 1998-04-28 Zama Japan Kk 膜式気化器の始動燃料供給装置
DE29710159U1 (de) 1997-06-11 1998-10-08 Robert Bosch Gmbh, 70469 Stuttgart Drosselelement
DE19730281A1 (de) * 1997-07-15 1999-01-21 Stihl Maschf Andreas Membranvergaser für einen Verbrennungsmotor in einem handgeführten Arbeitsgerät
DE10052486A1 (de) * 2000-10-23 2002-05-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10134526B4 (de) * 2001-07-16 2007-10-11 Robert Bosch Gmbh Schaltventil für Kraftstoffeinspritzsystem
WO2006049598A1 (fr) 2004-10-28 2006-05-11 Robert Bosch Gmbh Filtre d'injecteur de carburant
WO2008033062A1 (fr) * 2006-09-14 2008-03-20 Husqvarna Aktiebolag Ensemble d'alimentation en carburant
CN201141329Y (zh) 2007-12-29 2008-10-29 陈俭敏 一种化油器
US9297336B2 (en) * 2013-12-23 2016-03-29 Zama Japan Kabushiki Kaisha Carburetor with single diaphragm for supplying and metering fuel
JP6487631B2 (ja) * 2014-05-21 2019-03-20 株式会社やまびこ 層状掃気式２サイクル内燃エンジン
JP6733563B2 (ja) 2017-01-23 2020-08-05 株式会社デンソー 燃料フィルタ装置
DE102019004063A1 (de) * 2019-06-08 2020-12-10 Andreas Stihl Ag & Co. Kg Gemischbildungseinheit und Zweitaktmotor mit einer Gemischbildungseinheit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57198357A (en) * 1981-05-29 1982-12-04 Hitachi Ltd Carburetor
DE29722869U1 (de) 1997-12-24 1998-02-19 Fa. Andreas Stihl, 71336 Waiblingen Membranvergaser für ein tragbares, handgeführtes Arbeitsgerät
DE10142247A1 (de) * 2000-08-29 2002-03-14 Walbro Corp Modular aufgebauter Membranvergaser
US20080061454A1 (en) * 2006-09-08 2008-03-13 Walbro Engine Management, L.L.C. Auxiliary fuel and air supply in a carburetor
CN202690251U (zh) 2012-07-10 2013-01-23 陈俭敏 一种化油器及其进油系统
US20140306358A1 (en) * 2013-04-15 2014-10-16 Walbro Engine Management, L.L.C. Accelerator device for a carburetor

Also Published As

Publication number Publication date
CN112576415A (zh) 2021-03-30
US20210095619A1 (en) 2021-04-01
US11391248B2 (en) 2022-07-19

Similar Documents

Publication Publication Date Title
DE1576769C3 (de) Einrichtung zur Nachverbrennung der Abgase von Brennkraftmaschinen
DE102006032475B4 (de) Vergaser
DE2249802A1 (de) Kurbelgehaeuse-entlueftungsventil fuer brennkraftmaschinen
DE2710216A1 (de) Kraftstoffeinspritzduese
DE20009605U1 (de) Vorrichtung zur Entölung von Kurbelgehäuse-Entlüftungsgasen einer Brennkraftmaschine
EP1801410B1 (fr) Soupape de commande d'un fluide
EP3748151A1 (fr) Unité de formation de mélange et moteur à deux temps doté d'une unité de formation de mélange
DE3823525A1 (de) Vergaser fuer verbrennungsmotoren
EP1813785B1 (fr) Soupape de réglage de pression
DE4130582A1 (de) Membranvergaser
DE102004022275A1 (de) Druckregelventil
DE2211698B2 (de) Verfaser für Brennkraftmaschinen
DE102015203981A1 (de) Druckminderungsventil und Druckregelvorrichtung
EP3798439A1 (fr) Dispositif d'alimentation en carburant
DE3339714A1 (de) Vergaser
EP1561027B1 (fr) Soupape de commande d'un fluide
DE102015016484A1 (de) Manuell zu betätigende Förderpumpe und Kraftstoffsystem mit einer Förderpumpe
DE2918916A1 (de) Gasdurchflussteuervorrichtung und steuersystem fuer einen abgasturbolader
DE3202882C2 (de) Registervergaser für eine Brennkraftmaschine
DE102006063035B3 (de) Vergaser
DE10353683A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE1526551C (de) Vorrichtung zum Steuern der Lage eines Drosselventils in einem Ansaug system einer Brennkraftmaschine
DE1751429C3 (de) Vergaser für Brennkraftmaschinen
DE102007054486A1 (de) Ventil zur Durchleitung eines gasförmigen Mediums
EP4394173A1 (fr) Culasse pour un moteur à combustion interne et un moteur à combustion interne avec une telle culasse

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210924

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20221108