Charge forming method and apparatus

Claim 2

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess, and means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity.

Claim 3

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, laminar means disposed between the body members having perforations providing passages for fuel and air for delivery to the aperture means, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess, means in said fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, and restrictor means for regulating fuel flow from the fuel cavity to the aperture means.

Claim 4

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, laminar means disposed between the body members having perforations providing passages for fuel and air for delivery to the aperture means, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess, means in said fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, and restrictor means for regulating fuel flow from the fuel cavity to the aperture means.

Claim 5

Charge forming apparatus according to claim 2 wherein the means arranged to transmit movements of the diaphragm to the inlet valve includes a lever pivotally mounted by the second body member, said lever being arranged for operative engagement with the inlet valve, a second recess in the second body member, and resilient means extending into said second recess and engaging the lever for normally biasing the inlet valve toward closed position.

Claim 6

Charge forming apparatus according to claim 2 wherein the fluid flow restrictor means are adjustable.

Claim 7

Charge forming apparatus according to claim 2 wherein the fuel flow restrictor means are mounted by the second body member.

Claim 8

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, said aperture means including a main fuel delivery orifice and an engine idling fuel delivery orifice, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess for controlling fuel flow into the fuel cavity, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, a first adjustable restrictor means for regulating fuel flow to the main discharge orifice, and second adjustable restrictor means for regulating fuel flow to the engine idling orifice means.

Claim 9

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, said aperture means including a main fuel delivery orifice and an engine idling fuel delivery orifice, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess for controlling fuel flow into the fuel cavity, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, a first adjustable restrictor means for regulating fuel flow to the main discharge orifice, and second adjustable restrictor means for regulating fuel flow to the engine idling orifice means.

Claim 10

Charge forming apparatus according to claim 6 including an air bypass opening into the mixing passage, and one of the perforate pattern regions of the laminar means providing an elongated air flow channel in communication with said air bypass for admitting air from the mixing passage for mixing with the fuel delivered from the engine idling orifice means.

Claim 11

Charge forming apparatus according to claim 6 wherein the second body member has a single fuel flow passage in communication with a second perforate pattern region in said laminar means, said second perforate region in the laminar means being arranged to convey fuel to the region of the first restrictor means regulating fuel flow to the main orifice and for conveying fuel to the region adjacent the second restrictor means regulating fuel flow to the engine idling orifice means.

Claim 12

Charge forming apparatus according to claim 6 wherein the first and second adjustable restrictor means are mounted in the second body member.

Claim 13

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, said first body member having a chamber, said second body member having a portion extending into the chamber in the first body member, said extending portion having a recess, a fuel inlet valve disposed for slidable movement in said recess for controlling the fuel flow from the chamber into the fuel cavity in the second body member, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, and adjustable valve means mounted by one of said body members for regulating fuel flow to the aperture means.

Claim 14

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, said first body member having a chamber, said second body member having a portion extending into the chamber in the first body member, said extending portion having a recess, a fuel inlet valve disposed for slidable movement in said recess for controlling the fuel flow from the chamber into the fuel cavity in the second body member, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, and adjustable valve means mounted by one of said body members for regulating fuel flow to the aperture means.

Claim 15

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, said aperture means including a main fuel delivery orifice and an engine idling fuel delivery orifice, laminar means disposed between the body members having perforations providing fluid flow passages, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess for controlling fuel flow into the fuel cavity, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, an air bypass opening into the mixing passage in said first body member, one of said perforations in said laminar means establishing communication between said air bypass and the engine idling fuel delivery orifice for mixing air with the fuel delivered through the engine idling fuel delivery orifice.

Claim 16

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, said aperture means including a main fuel delivery orifice and an engine idling fuel delivery orifice, laminar means disposed between the body members having perforations providing fluid flow passages, a flexible diaphragm forming one wall of the fuel cavity, a recess in the second body member, a fuel inlet valve disposed for slidable movement in said recess for controlling fuel flow into the fuel cavity, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, an air bypass opening into the mixing passage in said first body member, one of said perforations in said laminar means establishing communication between said air bypass and the engine idling fuel delivery orifice for mixing air with the fuel delivered through the engine idling fuel delivery orifice.

Claim 17

Charge forming apparatus according to claim 11 wherein another of the perforations in the laminar means conveys fuel to the main fuel delivery orifice.

Claim 18

Charge forming apparatus according to claim 11 wherein the laminar means is interchangeable with laminar means wherein the perforation establishing communication between the air bypass and the engine idling fuel delivery orifice is of different configuration for modifying air flow for mixing with the fuel delivered through the engine idling fuel delivery orifice.

Claim 19

Charge forming apparatus according to claim 11 including first adjustable restrictor means for regulating fuel flow to the main fuel delivery orifice, and second adjustable restrictor means for regulating fuel flow to the engine idling orifice means.

Claim 20

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, a fuel inlet valve, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, and restrictor means mounted by the second body member for regulating fuel flow from the fuel cavity to the aperture means.

Claim 21

Charge forming apparatus comprising, in combination, a body construction including a first body member providing a fuel and air mixing passage, a second body member providing a fuel cavity, aperture means opening into the mixing passage, fluid flow control laminar means disposed between the body members having perforate pattern regions providing passages for fuel and air, a flexible diaphragm forming one wall of the fuel cavity, a fuel inlet valve, means in the fuel cavity arranged to transmit movements of the diaphragm to the inlet valve for controlling fuel flow into the fuel cavity, and restrictor means mounted by the second body member for regulating fuel flow from the fuel cavity to the aperture means.

Claim 22

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, fluid flow control laminar means disposed between the body members, one of the body members having a fuel and air mixing passage, a fuel cavity provided in the second body member, float-controlled valve means associated with the second body member for regulating fuel flow into the fuel cavity, main fuel delivery orifice means in the first body member opening into the mixing passage, supplemental fuel delivery orifice means in the first body member opening into the mixing passage, laminar means disposed between the body members having perforate pattern regions establishing communication of the fuel cavity with the main orifice means and with the supplemental orifice means, air bypass means in the first body member, and perforate pattern regions in the laminar means arranged to convey air from the air bypass means for mixing with fuel providing a fuel and air emulsion.

Claim 23

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, fluid flow control laminar means disposed between the body members, one of the body members having a fuel and air mixing passage, a fuel cavity provided in the second body member, float-controlled valve means associated with the second body member for regulating fuel flow into the fuel cavity, main fuel delivery orifice means in the first body member opening into the mixing passage, supplemental fuel delivery orifice means in the first body member opening into the mixing passage, laminar means disposed between the body members having perforate pattern regions establishing communication of the fuel cavity with the main orifice means and with the supplemental orifice means, air bypass means in the first body member, and perforate pattern regions in the laminar means arranged to convey air from the air bypass means for mixing with fuel providing a fuel and air emulsion.

Claim 24

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, a fuel and air mixing passage provided in the first body member, a fuel cavity in the second body member, main fuel delivery orifice means in the first body member opening into the mixing passage, supplemental fuel delivery orifice means in the first body member opening into the mixing passage, float-controlled, valve means associated with the second body member for regulating fuel flow into the fuel cavity, a plurality of laminations in contiguous relation disposed between the first and second body members, perforate pattern regions in the laminations establishing communication of the fuel cavity with the main orifice means, perforate pattern regions in certain of said laminations providing passages for conveying fuel to said supplemental orifice means, air bypass means in the first body member, and perforate pattern regions in certain of the laminations arranged to convey air from the air bypass means for mixing with fuel providing a fuel and air emulsion for delivery to the main orifice means and to the supplemental orifice means.

Claim 25

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, a fuel and air mixing passage provided in the first body member, a fuel cavity in the second body member, main fuel delivery orifice means in the first body member opening into the mixing passage, supplemental fuel delivery orifice means in the first body member opening into the mixing passage, float-controlled, valve means associated with the second body member for regulating fuel flow into the fuel cavity, a plurality of laminations in contiguous relation disposed between the first and second body members, perforate pattern regions in the laminations establishing communication of the fuel cavity with the main orifice means, perforate pattern regions in certain of said laminations providing passages for conveying fuel to said supplemental orifice means, air bypass means in the first body member, and perforate pattern regions in certain of the laminations arranged to convey air from the air bypass means for mixing with fuel providing a fuel and air emulsion for delivery to the main orifice means and to the supplemental orifice means.

Claim 26

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, a fuel and air mixing passage provided in the first body member, a fuel cavity in the second body member, main orifice means in the first body member opening into the mixing passage, supplemental orifice means in the first body member opening into the mixing passage, float-controlled valve means associated with the second body member for regulating fuel flow into the fuel cavity, fluid flow control laminar means disposed between said body members, said laminar means comprising plural plate members in contiguous relation, certain of said plural plate members having perforations providing fluid flow passages, the plate member contiguous with the second body member having a perforation in communication with the fuel cavity for conveying fuel to perforations in other plate members for delivery to said main orifice means and said supplemental orifice means in the first body member.

Claim 27

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, a fuel and air mixing passage provided in the first body member, a fuel cavity in the second body member, main orifice means in the first body member opening into the mixing passage, supplemental orifice means in the first body member opening into the mixing passage, float-controlled valve means associated with the second body member for regulating fuel flow into the fuel cavity, fluid flow control laminar means disposed between said body members, said laminar means comprising plural plate members in contiguous relation, certain of said plural plate members having perforations providing fluid flow passages, the plate member contiguous with the second body member having a perforation in communication with the fuel cavity for conveying fuel to perforations in other plate members for delivery to said main orifice means and said supplemental orifice means in the first body member.

Claim 28

Charge forming apparatus according to claim 18 wherein one of the plate members is provided with restrictor means for controlling fuel flow to the main orifice means.

Claim 29

Charge forming apparatus according to claim 19 wherein said one of the plate members is provided with a second restrictor means for controlling fuel flow to said supplemental orifice means.

Claim 30

Charge forming apparatus according to claim 18 wherein one of the plate members has an elongated perforation providing a fuel well.

Claim 31

Charge forming apparatus according to claim 18 wherein another of the plate members is provided with an elongated perforation providing a second fuel well.

Claim 32

Charge forming apparatus according to claim 18 wherein each of two of the plate members is provided with an elongated perforation providing a fuel well, means for admitting air to the fuel wells, and a plate member disposed between the plate members having the fuel wells provided with metering orifices for metering mixtures of fuel and air for delivery to the main orifice means and supplemental orifice means.

Claim 33

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, a fuel and air mixing passage provided in the first body member, a throttle valve in said mixing passage, a fuel cavity in the second body member, main orifice means in the first body member opening into the mixing passage, supplemental orifice means in the first body member opening into the mixing passage, a cover member for the second body member, a relatively movable inlet valve mounted by the cover member, float means in the fuel cavity having operative engagement with the inlet valve for controlling fuel flow into the fuel cavity, a plurality of laminations arranged in stacked relation between the first and second body members, one of said laminations being of greater thickness than the other laminations, said other laminations having perforations providing flow passages for conveying fuel and air mixture for delivery through the main orifice means and the supplemental orifice means, passages in the said lamination of increased thickness accommodating flow of fuel, a first adjustable valve means mounted by the lamination of increased thickness for regulating fuel flow to the main orifice means, and second adjustable valve means mounted by the lamination of increased thickness for regulating flow of fuel to the supplemental orifice means, and means securing the first and second body members and the plurality of laminations in assembled relation.

Claim 34

Charge forming apparatus, in combination, a body construction comprising a first body member and a second body member, a fuel and air mixing passage provided in the first body member, a throttle valve in said mixing passage, a fuel cavity in the second body member, main orifice means in the first body member opening into the mixing passage, supplemental orifice means in the first body member opening into the mixing passage, a cover member for the second body member, a relatively movable inlet valve mounted by the cover member, float means in the fuel cavity having operative engagement with the inlet valve for controlling fuel flow into the fuel cavity, a plurality of laminations arranged in stacked relation between the first and second body members, one of said laminations being of greater thickness than the other laminations, said other laminations having perforations providing flow passages for conveying fuel and air mixture for delivery through the main orifice means and the supplemental orifice means, passages in the said lamination of increased thickness accommodating flow of fuel, a first adjustable valve means mounted by the lamination of increased thickness for regulating fuel flow to the main orifice means, and second adjustable valve means mounted by the lamination of increased thickness for regulating flow of fuel to the supplemental orifice means, and means securing the first and second body members and the plurality of laminations in assembled relation.