Atomization and fuel cutoff carburetor

Claim 2

A carburetor for substantially completely atomizing fuel, the carburetor comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel, the atomization structure having an inner wall portion formed with recesses; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber to constitute a continuous flow passageway; c. a throttle valve positioned in the continuous flow passageway to regulate the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber; f. a double-walled reserve fuel container coupled to a top portion of the atomization structure, the fuel container defining a fuel chamber surrounding the fuel injector end not coupled to the metering valve; g. means defining fuel ports in a fuel injector end surrounded by the fuel chamber; h. a strip of heat reflective material located between the fuel container double walls for insulating the fuel chamber from external heat sources; and, i. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel and air admissible into the mixing chamber, wherein the inner wall portion recesses aRe aligned substantially perpendicular relative to the air inlet structure axis so that airborne droplets of fuel can become deposited in the recesses and thereafter blasted by an air stream to achieve fine atomization for efficient combustion.

Claim 3

The structure according to claim 1, including: a first nipple connected to the fuel container for supplying fuel to the fuel chamber; and, a second nipple connected to the fuel container top for bleeding off fuel vapors and minimizing interference with a smooth flow of fuel through the fuel ports.

Claim 4

A carburetor for substantially completely atomizing fuel, the carburetor comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel, the atomization structure having an inner wall portion formed with recesses; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber to constitute a continuous flow passageway; c. a throttle valve positioned in the continuous flow passageway to regulate the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber, the metering valve including an elongated metallic pin formed with a longitudinally extending recess retaining a molded plastic insert formed with a channel for conducting fuel into the mixing chamber; and, f. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel and air admissible into the mixing chamber, wherein the inner wall portion recesses are aligned substantially perpendicular relative to the air inlet structure axis so that airborne droplets of fuel can become deposited in the recesses and thereafter blasted by an airstream to achieve fine atomization for efficient combustion.

Claim 5

A carburetor for substantially completely atomizing fuel, the carburetor comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel, the atomization structure having an inner wall portion formed with recesses; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber to constitute a continuous flow passageway; c. a throttle valve positioned in the continuous flow passageway to regulate the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber, the metering valve including an elongated metallic pin formed with a longitudinally extending recess retaining a molded plastic insert formed with a channel for conducting fuel into the mixing chamber; and, f. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel and air admissible into the mixing chamber, wherein the inner wall portion recesses are aligned substantially perpendicular relative to the air inlet structure axis so that airborne droplets of fuel can become deposited in the recesses and thereafter blasted by an airstream to achieve fine atomization for efficient combustion.

Claim 6

The structure according to claim 3, wherein the fuel injector includes: a central fuel passageway for conducting fuel supplied from a fuel source; a valve seat formed with a bore for slidably retaining the metering valve so that the central fuel passageway and metering valve can be selectively moved into mutual communication; and, a spring positioned in the fuel central passageway and biased against the metering valve to constantly urge its bottom end against the bracket, the bracket and metering valve bottom end serving as cam and cam follower respectively.

Claim 7

A carburetor having a fuel cutoff means for automatically terminating the flow of fuel into an air and fuel mixing chamber upon vehicle deceleration, comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber; c. a throttle valve connected to the air inlet structure for regulating the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber; f. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel and air admissible into the mixing chamber; g. a pressure responsive pneumatic relay valve physically separated from the atomization structure; h. conduit means connecting the relay valve and atomizing structure; i. a spring-biased shuttle responsively coupled to the relay valve through the conduit means so that when vehicle deceleration occurs the shuttle automatically shifts the injector to a location where communication is blocked between the metering valve and fuel injector; j. a fuel container secured to the shuttle and defining a fuel chamber surrounding an upper end of the injector; and, k. a vacuum chamber positioned between the fuel container and atomization structure, the conduit means includiNg a first flexible tube interconnecting the mixing chamber and relay valve and a second flexible tube interconnecting the vacuum chamber and valve, the tubes and valve coacting to admit atmospheric air into the vacuum chamber upon vehicle deceleration to thereby shift the injector.

Claim 8

A carburetor having a fuel cutoff means for automatically terminating the flow of fuel into an air and fuel mixing chamber upon vehicle deceleration, comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber; c. a throttle valve connected to the air inlet structure for regulating the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber; f. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel and air admissible into the mixing chamber; g. a pressure responsive pneumatic relay valve physically separated from the atomization structure; h. conduit means connecting the relay valve and atomizing structure; i. a spring-biased shuttle responsively coupled to the relay valve through the conduit means so that when vehicle deceleration occurs the shuttle automatically shifts the injector to a location where communication is blocked between the metering valve and fuel injector; j. a fuel container secured to the shuttle and defining a fuel chamber surrounding an upper end of the injector; and, k. a vacuum chamber positioned between the fuel container and atomization structure, the conduit means includiNg a first flexible tube interconnecting the mixing chamber and relay valve and a second flexible tube interconnecting the vacuum chamber and valve, the tubes and valve coacting to admit atmospheric air into the vacuum chamber upon vehicle deceleration to thereby shift the injector.

Claim 9

The structure according to claim 5 including: an intermediate wall between the fuel container and atomization structure, the wall having an upper annular lip located radially outwardly of the fuel container base; and, a diaphragm having a flexible annular strip extending between the annular lip and fuel container base, the strip being arranged to flex upwardly when atmospheric air occupies the vacuum chamber.

Claim 10

The structure according to claim 6 wherein the diaphragm includes a skirt portion depending from the radially outward edge of the annular strip, the skirt being sized to fit snugly over the annular lip of the intermediate wall.

Claim 11

The structure according to claim 7 wherein the intermediate wall lip is formed with a radially outwardly projecting bead, and, an inner wall portion of the diaphragm skirt is formed with a recess for accomplishing a snap fit over the bead, the diaphragm being generally shaped for quick removal without dismantling adjacent structural components.

Claim 12

The structure according to claim 5 wherein the pressure responsive pneumatic relay valve includes: a housing defining a spring chamber always in communication with atmospheric air and a variable pressure chamber always in communication with the mixing chamber through said first flexible tube; a longitudinally slidable sleeve valve disposed between the spring chamber and variable pressure chamber, the sleeve valve having a first radial port adjacent the spring chamber, a second radial port always in communication with said second flexible tube and a third radial port adjacent the variable pressure chamber; a spring in the spring chamber for biasing the sleeve valve so that the first port is closed and the third port is opened during vehicle nondeceleration conditions and the first and second flexible tubes are in mutual communication; and, a sleeve-actuating diaphragm having an inner face coupled to the housing adjacent the third port and exposed to the variable pressure chamber and an outer face always exposed to atmospheric pressure, whereby, upon vehicle deceleration and concomitant decreased pressure in the mixing chamber the atmospheric pressure on the diaphragm outer face overcomes the spring biasing force to close the third port and open the first port with the result that atmospheric pressure from the spring chamber is then permitted to enter the vacuum chamber to shift the injector and cut off the fuel supply.

Claim 13

A carburetor having an atomization component for substantially completely atomizing fuel and a pressure responsive pneumatic relay valve component for automatically terminating the flow of fuel into an air and fuel mixing chamber upon vehicle deceleration, the carburetor comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel, the atomization structure having an inner wall portion formed with recesses; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber to constitute a flow passageway; c. a throttle valve positioned in the continuous flow passageway to regulate the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber, the inner wall portion recesses being aligned with the air inlet and metering valve so that airborne droplets of fuel can become deposited in the recesses and thereafter blasted by airstreams to achieve fine atomization for efficient combustion; f. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel And air admissible into the mixing chamber; g. a pressure responsive pneumatic relay valve physically separated from the atomization structure; h. conduit means connecting the relay valve and atomization structure; i. a spring-biased shuttle responsively coupled to the relay valve through the conduit means so that when vehicle deceleration occurs the injector is automatically shifted to a location where communication is blocked between the metering valve and fuel injector, the atomization structure inner wall portion being corrugated so that said recesses are aligned substantially perpendicular relative to the air inlet structure axis, the structure including; j. a baffle plate connected to the atomization structure terminating at a free end at a point spaced from the inner wall portion to define a narrow throat sized to increase the velocity and miscibility of air and fuel mixtures; k. a fuel container secured to the shuttle and defining a fuel chamber surrounding an upper end of the injector; l. an intermediate wall between the fuel container and atomization structure, the intermediate wall having an upper annular lip located radially outwardly of the fuel container base; m. a vacuum chamber positioned between the fuel container and atomization structure, the vacuum chamber being defined in part by the intermediate wall; and, n. a diaphragm having a flexible annular strip extending between the annular lip and fuel container base, the strip being arranged to flex upwardly when atmospheric air occupies the vacuum chamber.

Claim 14

A carburetor having an atomization component for substantially completely atomizing fuel and a pressure responsive pneumatic relay valve component for automatically terminating the flow of fuel into an air and fuel mixing chamber upon vehicle deceleration, the carburetor comprising: a. atomization structure defining a mixing chamber for accepting and mixing charges of air and fuel, the atomization structure having an inner wall portion formed with recesses; b. air inlet structure defining an air inlet positioned in communication with the mixing chamber to constitute a flow passageway; c. a throttle valve positioned in the continuous flow passageway to regulate the quantity of air flowable into the mixing chamber; d. a fuel injector coupled to the atomization structure; e. a metering valve connected to one end of the fuel injector and projecting into the mixing chamber, the inner wall portion recesses being aligned with the air inlet and metering valve so that airborne droplets of fuel can become deposited in the recesses and thereafter blasted by airstreams to achieve fine atomization for efficient combustion; f. a bracket interconnecting the metering valve and throttle valve for synchronizing the proportions of fuel And air admissible into the mixing chamber; g. a pressure responsive pneumatic relay valve physically separated from the atomization structure; h. conduit means connecting the relay valve and atomization structure; i. a spring-biased shuttle responsively coupled to the relay valve through the conduit means so that when vehicle deceleration occurs the injector is automatically shifted to a location where communication is blocked between the metering valve and fuel injector, the atomization structure inner wall portion being corrugated so that said recesses are aligned substantially perpendicular relative to the air inlet structure axis, the structure including; j. a baffle plate connected to the atomization structure terminating at a free end at a point spaced from the inner wall portion to define a narrow throat sized to increase the velocity and miscibility of air and fuel mixtures; k. a fuel container secured to the shuttle and defining a fuel chamber surrounding an upper end of the injector; l. an intermediate wall between the fuel container and atomization structure, the intermediate wall having an upper annular lip located radially outwardly of the fuel container base; m. a vacuum chamber positioned between the fuel container and atomization structure, the vacuum chamber being defined in part by the intermediate wall; and, n. a diaphragm having a flexible annular strip extending between the annular lip and fuel container base, the strip being arranged to flex upwardly when atmospheric air occupies the vacuum chamber.

Claim 15

The structure according to claim 10, wherein the conduit means includes a first flexible tube interconnecting the mixing chamber and pressure responsive pneumatic relay valve and a second flexible tube interconnecting the vacuum chamber and relay valve, the tubes and relay valve coacting to admit atmospheric air into the vacuum chamber upon vehicle deceleration to thereby shift the fuel injector.

Claim 16

The structure according to claim 11 wherein: the metering valve includes an elongated metallic pin formed with a longitudinally extending recess retaining a molded plastic insert formed with a channel for conducting fuel into the mixing chamber; and, the fuel container has double walls between which is situated a strip of heat reflective material for insulating the fuel chamber from external heat sources.

Claim 17

The structure according to claim 12, wherein the diaphragm includes: a skirt portion depending from the radially outward edge of the annular strip, an inner wall portion of the diaphragm skirt being formed with a recess and, the intermediate wall lip is formed with a radially outwardly projecting bead shaped to accomplish a snap fit with said diaphragm skirt recess so that the diaphragm can be quickly removed without dismantling the intermediate wall.