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
  • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
  • F02M69/06—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the pressurisation of the fuel being caused by centrifugal force acting on the fuel
• • 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
  • F02M17/16—Carburettors having continuously-rotating bodies, e.g. surface carburettors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D2200/00—Input parameters for engine control
  • F02D2200/02—Input parameters for engine control the parameters being related to the engine
  • F02D2200/06—Fuel or fuel supply system parameters
  • F02D2200/0606—Fuel temperature

Definitions

• Rotor carburetor for starting and operating an internal combustion engine even at high fuel temperatures
• the invention relates to a rotor carburetor, the rotor of which is equipped with an impeller, is rotatably arranged around a fuel supply pipe immersed in a contactless manner in a central bore of the rotor body and has a fuel outlet opening located within the rotor and has a lateral fuel outlet bore for supply with fuel is connected to a fuel delivery duct leading in the rotor body to the fuel outlet opening of the supply pipe.
• a rotor-carburetor is described in US Pat. No. 2,825,906, in which the rotor contains a cylindrical fuel chamber into which one enters from above. Immersed fuel supply pipe and from the near the bottom lead several radial nozzle channels from which fuel is sprayed against a fixed atomizing ring when the rotor is rotating.
• the rotor contains a chamber which is heart-shaped in longitudinal section and into which air flows from above through one channel and through a second one arranged therein.
• Channel fuel is introduced and from the bottom area several nozzle channels, for example, directed obliquely downwards between the vanes of the impeller, lead outwards.
• a low pollutant content in the exhaust gases of internal combustion engines without additional consumption of fuel, which meets the currently applicable standards, could be achieved with rotor carburettors, which are described in DE-PS 25 36996, US-PS 4283 358 and CH patent application No. 3309 / 82- 9 of the applicant are described.
• the rotor contains a bore which is coaxial with its axis of rotation, into which a fixedly arranged fuel feed pipe is immersed, and in the axial direction above the outlet opening of the fuel feed pipe at least one side screen or nozzle which is connected to a through a connecting channel
• a cylindrical fuel chamber is connected, the diameter of which is somewhat smaller than the diameter of the outlet opening.
• a rotor carburetor according to the present invention With a rotor carburetor according to the present invention, it was possible to start an internal combustion engine even with hot fuel at approximately 80 ° C. and to keep it running. Surprisingly, it was found that the rotor-carburetor according to the invention not only maintains the low pollutant values previously achieved in the exhaust gases, but also with regard to those in particular during rapid closing. the throttle valve occurring pollutant peak values could be reduced even further.
• the inclined inlet section of the fuel delivery channel means a certain additional mechanical effort, which however, in view of the result achieved, it should be assessed as minor.
• Rotor gasifier has a cylindrical rotor body 2, e.g. made of aluminum, with bearing pins 4a, 4b formed on its two end faces 3a, 3b, on which ball bearings 5a, 5b are placed.
• the ball bearings 5a, 5b are arranged in bearing heads 6a, 6b, which are held by radial struts 7a, 7b, only one of which is shown in the drawing, in a bushing not shown in the drawing.
• the sleeve with the rotor 1 rotatable about its longitudinal axis as the axis of rotation 8 can be arranged in the intake duct of an internal combustion engine.
• a central bore 9 is guided through a bearing journal 4a and extends approximately to the center of the rotor body 2.
• the bearing head 6a arranged at the open end of the bore 9 carries a fuel supply pipe 10 which is coaxial with the axis of rotation 8 and which contacts the central bore 9 without contact protrudes so that between the fuel supply pipe 10 and the wall of the bore 9 there is a narrow annular gap 14 and the rotor body 2 can freely rotate around the fuel supply pipe 10.
• the fuel supply pipe 10 is connected to a fuel supply channel 15 which is guided through one of the struts 7a of the bearing head 4a and is connected to a conventional fuel source, such as a float.
• Aa of the upper end face 3a lying in the area of the bore 9 is tightly pressed onto the rotor body 2, which contains a lateral fuel outlet bore 17.
• This fuel outlet bore 17 is preferably formed in a ruby orifice or nozzle 18 which is inserted into the ring 16.
• the fuel outlet bore 17 is connected to the outlet opening 11 of the fuel supply tube 10 by a fuel delivery channel 19 so that when the rotor 1 rotates, fuel is conveyed from the feed pipe 10 through the delivery channel 19 to the outlet bore 17 as a result of the acting centrifugal force.
• the fuel delivery channel 19 has an inlet section 20 leading away from its inlet opening 21 downstream and in the radial direction from the rotor axis of rotation 8, which includes an acute angle ⁇ with the rotor axis of rotation 8 and intersects the axis of rotation 8 downstream of the inlet opening 21.
• the further course of the delivery channel 19 is in itself arbitrary.
• the radial end section 19c has the largest diameter and the inlet section 20 has the smallest diameter, while the diameters of the channel sections lying therebetween have intermediate values. It has proven to be advantageous to connect the feed channel part leading away from the inlet section 20, that is to say here the radial starting section 19a, to the inlet section 20 such that the axis of rotation 8 intersects the inlet section 20 at a point C which is substantially closer to the inlet opening 21 of the inlet section 20 than the junction 22.
• the bottom of the central bore 9 has a preferably conical elevation 23, in the end face of which the inlet opening 21 of the inlet section 20 lies, and accordingly the fuel supply tube 10 has a conical recess 12 at the outlet end, in the bottom of which the outlet opening 11 lies, so that the outlet opening 11 and the inlet opening 21 are connected to the annular gap 14 by a narrow, essentially conical gap 13 between the elevation 23 and the outlet end of the fuel supply pipe 10.
• the rotor body 2 expediently has a continuous central bore 9a, which is sealed off at one end by a locking pin 24 which has the conical elevation 23 and contains the inlet section 20 of the conveying channel.
• an impeller 25 is fastened to the rotor body 2 with a sleeve 26 which, between the outer surface of the rotor body 2 and the inner wall 27 of the sleeve 26, seals a seal which is sealed off above the fuel outlet bore 17 and widens conically downwards and forms an open annular space 28 at the bottom through bores 29 and which ends below the bores in an atomizing ring 30 with a spray edge 31.
• a small amount of fuel is branched off from the fuel flow and separates the annular gap 14 between Fills the fuel supply tube 10 and the inner wall of the rotor body 2 at least in a lower region and thus shuts off the fuel flow system against the ingress of air from the outside.
• This flow system corresponds essentially to that of the earlier rotor carburettors, in which, as mentioned at the beginning, the fuel channel leading to the outlet bore 17 was connected to a cylindrical fuel chamber located downstream of the outlet opening 11 of the feed pipe 10 and coaxial with the rotor axis of rotation 8. It is understandable that such a flow system can easily cause difficulties when operating with hot fuel because of the vapor bubbles settling at any point along the flow path. It is surprising, however, that these difficulties could essentially be remedied by providing the inclined inlet section 20 instead of the cylindrical fuel chamber coaxial with the rotor axis of rotation. An explanation for this cannot be found.
• feed pipe 10 inner diameter 1.4 mm
• Inlet section 20 diameter 1.12 - 1.15 mm
• Middle section 19b diameter 1.2 mm
• Outlet bore 17 diameter 0.53 mm.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Means For Warming Up And Starting Carburetors (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4264561

Family Applications (1)

Country Status (6)

Cited By (3)

Citations (2)

Family Cites Families (1)

• 1983
  • 1983-07-12 CH CH3838/83A patent/CH663823A5/de not_active IP Right Cessation
• 1984
  • 1984-05-04 WO PCT/CH1984/000068 patent/WO1985000412A1/de not_active Ceased
  • 1984-05-04 DE DE8484901735T patent/DE3470080D1/de not_active Expired
  • 1984-05-04 EP EP84901735A patent/EP0149614B1/de not_active Expired
  • 1984-06-05 CS CS844231A patent/CS255860B2/cs unknown
  • 1984-06-07 IT IT21287/84A patent/IT1176279B/it active

Patent Citations (2)

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