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

Definitions

• the invention relates to a device of the type mentioned, in which a rotating, truncated cone-shaped atomizing body 6, which is connected to an electric motor 2 via a hollow shaft 4, is provided.
• CH-PS 559 856 which uses the intake air flow to drive an impeller that injects fuel into the intake pipe due to its rotation, should not have the short response times that are necessary to allow an electronic control to be fully effective.
• FR-PS 1 247 924 provides the suction of the fuel through a hollow shaft to the head end of a frusto-conical atomizing body, where it is deflected onto the surface of this body, on which it spreads and is from the edge of this body or from fine holes near the edge, which then becomes a lip is trained, the intake air thrown against by special devices is prevented from forming turbulence.
• This invention also does not meet the requirement for the greatest possible turbulence in the mixture formation, which is required by the current state of the art.
• the invention has for its object to provide a device of the type mentioned, with which an improved use of the fuel is achieved compared to the current state of the art.
• the best possible mixing of air and fuel and the most exact observance of the stoichiometrically necessary mixing ratio - or a controlled deviation from this - are required under all operating conditions.
• the solution with the most promising solution appears to be an electronic control system. Compare Automotive Engineering, 85, No. 2 (Feb. 1977), 45 - 51: "Lambda-Sond: Complete Emission Control?". However, this requires coupling the control system to an efficient, fast-reacting mixture preparation system.
• the aim of the invention is to provide such a system which can also be controlled non-electronically if suitably designed.
• this object is achieved by a device for the meterable atomization of fuels to form the fuel-air mixture in the intake pipe of internal combustion engines, in which a rotating, frustoconical atomizer body 6 connected via a hollow shaft 4 to an electric motor 2 is provided, characterized in that before The atomizing body 6 is a smaller, approximately cone-shaped suction body 1, which, like the atomizing body 6, extends from the cone head in the flow direction of the air, so that the suction body 1 is controlled by a controllable second electric motor 5 with a smaller one Speed is driven as the atomizing body 6, the axis 3 of which extends through the hollow shaft 4 of the atomizing body 6, and that the suction body 1 receives the fuel with a pin 9 at its head end from the fuel supply 10 and from its conical surface 12 or from near this surface running holes 8 throws onto the distributor surface 7 of the atomizing body 6.
• baffle plates can be arranged in the air flow in front of the atomizing body, which give the air a swirl that corresponds to the direction of rotation of the atomizing.
• exercise body 6 is opposite, and which can cover the fuel supply.
• the atomization body 6 can be heated from the inside.
• a grid or perforated plate 11 can be arranged, which partially causes the sprayed fuel particles to bounce back on the distributor surface 7, partially intensively mixing them with the intake air, by causing strong small turbulence above the distributor surface 7.
• the grille or perforated plate 11 is designed as a grille or with perforation only in the part which is more distant from the suction body 1, so that the front part acts completely as a baffle plate for those who exit the suction body 1 particularly quickly
• a wavy or toothed design of the distributor surface 7 of the atomizing body 6 can be particularly advantageous for the atomization, since the fuel particles are then exposed to a centrifugal force that rapidly changes in strength.
• the distributor surface 7 and grille or perforated plate 11 are advantageously curved so that the convex Side of the grid or perforated plate 11 faces the concave distributor surface 7 or the convex distributor surface 7 of the concave side of the grid or perforated plate 11.
• the centrifugal acceleration started by the suction body 1 continues on the distributor surface 7. If the opposite direction of rotation is selected for the two rotating bodies and the atomizing body 6 runs at a sufficiently high speed, the fuel thrown out of the suction body 1 hits an air layer which migrates as a circulation flow to the blunt end of the atomizing body 6 and from which Fuel is detected and distributed particularly finely.
• FIG. 1 of the application an exemplary embodiment is shown in section in a simplified manner.
• the axis 3 and the hollow shaft 4 run coaxially approximately in the middle of the intake pipe, which is curved at some distance behind the atomizing body 6, so that axis 3 and hollow shaft 4 are guided through its wall and the two electric motors 2 and 5 outside the Intake pipe are arranged.
• the atomizing body 6 delivers the fuel from its distributor surface 7 and from its outer edge in a finely distributed form to the intake air which is caused by strong turbulence by baffles, which are not shown in the drawing.
• FIG. 2 shows a section of FIG.
• FIG. 1 in a simplified sectional view, a wavy convex distribution ler Structure 7 and a concave grid or perforated sheet 11 have been selected.
• Figure 3 shows the same modified so that the distributor surface is concave and partially wavy, partially toothed and the grid or perforated plate 11 turns its convex side of the distributor surface 7.
• the invention advantageously achieves the metering and fine distribution of the fuel and the thorough mixing of air and fuel in the intake manifold. These advantages have a particularly strong effect if the device is coupled to an electronic control system which calculates the most favorable speed for the intake body 1 and the atomizing body 6 from the operating state of the internal combustion engine and its load and controls its speed accordingly.
• the speed of the intake body 1 By controlling the speed of the intake body 1, the amount of fuel supplied is metered, while the rotation of the atomizing body, in cooperation with the amount and turbulence of the air, determines the quality of the mixture preparation. This makes it possible to maintain the most favorable stoichiometric ratio between air and fuel ( ⁇ - 1) with great accuracy and reliability, but also to change it under certain operating conditions if it is desirable (lean operation at idle e.g.).
• a mode of operation which is satisfactory in comparison to the electronic control can also be achieved by a mechanical or electrical control which receives its signal either from a measuring device for the amount of the intake air or possibly from the person operating the internal combustion engine itself, whereby the throttle valve could be omitted .
• the manufacturing costs are probably considerably lower than those of injection systems.
• the conventional injection systems or carburettors can be replaced by this rotary carburetor.
• the device is connected to an electronic control, operation with fuels of very different types is possible; mechanical errors can be compensated to a certain extent by the electronic control.
• the setting work is limited to mechanical, electrical or electronic control.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Fuel-Injection Apparatus (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6699847

Family Applications (1)

Country Status (3)

Citations (10)

• 1979
  • 1979-08-06 JP JP50193579A patent/JPS56501019A/ja active Pending
  • 1979-08-06 WO PCT/DE1979/000080 patent/WO1981000432A1/de unknown
• 1981
  • 1981-02-24 EP EP19790901503 patent/EP0032894A1/de not_active Withdrawn

Patent Citations (10)

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