Carburetor

Claim 2

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to supply a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to supply a rich mixture to the auxiliary combustion chamber of the engine, each of the passages having a throttle valve therein carried on a shaft, means mounting said shafts for turning movement, said means including a hollow stationary hub encircling a portion of one of said shafts, a member mounted to turn on the hub, means for applying a linear force to said member to cause it to turn in one direction, resilient means connected to turn the member in the other direction, means on an end of the shaft projecting from the hub connecting said member to turn said shaft, and means for coordinating turning movements of said shafts.

Claim 3

The combination set forth in claim 1 in which said resilient means comprises a torsion spring encircling the hub.

Claim 4

The combination set forth in claim 1 in which the primary and auxiliary passages are both provided in a carburetor body, and wherein the hollow stationary hub projects from the body.

Claim 5

The combination set forth in claim 1 in which the primary passage is formed in one body and the auxiliary passage is formed in another body spaced therefrom.

Claim 6

The combination set forth in claim 1 in which the latter said means includes adjusting means for changing the angular position of the auxiliary throttle valve with respect to the primary throttle valve.

Claim 7

The combination set forth in claim 1 in which the latter said means includes an arm connected to turn with each of said shafts, respectively, a link pivotally connected to each of said arms, and means for adjusting the angular position of one of the arms with respect to its respective shaft.

Claim 8

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a body having a primary passaGe, a secondary passage, and a auxiliary passage therein, the primary passage and the secondary passage being adapted to supply a lean mixture to the main combustion chamber of the engine, the auxiliary passage being adapted to supply a rich mixture to the auxiliary combustion chamber of the engine, each of the passages having a throttle valve therein and carried on a shaft, means mounting said shafts to turn on the body, said means including a hollow stationary hub projecting from the body and encircling a portion of one of said shafts, a member mounted to turn on the hub, means for applying a linear force to said member to cause it to turn in one direction, resilient means connected to turn the member in the other direction, and means on an end of the shaft projecting from the hub connecting said member to turn said shaft, and means for coordinating turning movements of said shafts.

Claim 9

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a body having a primary passaGe, a secondary passage, and a auxiliary passage therein, the primary passage and the secondary passage being adapted to supply a lean mixture to the main combustion chamber of the engine, the auxiliary passage being adapted to supply a rich mixture to the auxiliary combustion chamber of the engine, each of the passages having a throttle valve therein and carried on a shaft, means mounting said shafts to turn on the body, said means including a hollow stationary hub projecting from the body and encircling a portion of one of said shafts, a member mounted to turn on the hub, means for applying a linear force to said member to cause it to turn in one direction, resilient means connected to turn the member in the other direction, and means on an end of the shaft projecting from the hub connecting said member to turn said shaft, and means for coordinating turning movements of said shafts.

Claim 10

The combination set forth in claim 7 in which said resilient means comprises a torsion spring encircling said hub.

Claim 11

The combination set forth in claim 7 in which vacuum-operated means are provided for turning the secondary throttle shaft, and cam and follower means acting to permit movement of the secondary throttle shaft by said vacuum-operated means.

Claim 12

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage and a secondary passage adapted to deliver a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, a forward extending arm connected to turn with the primary throttle shaft, a rearward extending arm connected to turn with the auxiliary throttle shaft, a link pivotally connected to each of said arms to cause the primary throttle valve and the auxiliary throttle valve to turn in opposite directions, and means including a cam and follower for causing turning movement of the secondary throttle valve after the main throttle valve has turned through a predetermined arc of travel.

Claim 13

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage and a secondary passage adapted to deliver a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, a forward extending arm connected to turn with the primary throttle shaft, a rearward extending arm connected to turn with the auxiliary throttle shaft, a link pivotally connected to each of said arms to cause the primary throttle valve and the auxiliary throttle valve to turn in opposite directions, and means including a cam and follower for causing turning movement of the secondary throttle valve after the main throttle valve has turned through a predetermined arc of travel.

Claim 14

The combination set forth in claim 10 in which angular adjustment means are interposed between the rearward extending arm and the auxiliary throttle shaft.

Claim 15

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to deliver a lean mixture of the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, a forward extending arm connected to turn with the primary throttle shaft, a rearward extending arm connected to turn with the auxiliary throttle shaft, the effective length of the forward arm being approximately three-fourth of that of the rearward arm, a link pivotally connected to each of said arms to cause the primary throttle valve and the auxiliary throttle valve to turn in opposite direction, the parts having the following geometric relationship: (a + c)/d 0.9 -1.2 where: a effective length of forward arm c effective length of the link d distance between centerlines of throttle shafts.

Claim 16

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to deliver a lean mixture of the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, a forward extending arm connected to turn with the primary throttle shaft, a rearward extending arm connected to turn with the auxiliary throttle shaft, the effective length of the forward arm being approximately three-fourth of that of the rearward arm, a link pivotally connected to each of said arms to cause the primary throttle valve and the auxiliary throttle valve to turn in opposite direction, the parts having the following geometric relationship: (a + c)/d 0.9 -1.2 where: a effective length of forward arm c effective length of the link d distance between centerlines of throttle shafts.

Claim 17

The combination set forth in claim 12 in which means are provided for adjusting the position of the rearward extending arm with respect to the auxiliary throttle valve.

Claim 18

The combination set forth in claim 12 in which the primary throttle shaft extends through a stationary hollow hub, an actuator member mounted to turn on the hub and carrying said forward arm, and means connecting the actuator member to the primary throttle shaft.

Claim 19

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage and a secondary passage adapted to deliver a lean mixture of the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, means connecting the main throttle valve and the auxiliary throttle valve for coordinated turning movement, means for causing turning movement of the secondary throttle valve after the main throttle valve has turned through a predetermined arc of travel, said means including vacuum operated means for turning the secondary throttle valve, a spring opposing the action of the vacuum operated means, and means including a cam and follower acting to limit the extent of turning movement of the secondary throttle shaft by said vacuum operated means.

Claim 20

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage and a secondary passage adapted to deliver a lean mixture of the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, means connecting the main throttle valve and the auxiliary throttle valve for coordinated turning movement, means for causing turning movement of the secondary throttle valve after the main throttle valve has turned through a predetermined arc of travel, said means including vacuum operated means for turning the secondary throttle valve, a spring opposing the action of the vacuum operated means, and means including a cam and follower acting to limit the extent of turning movement of the secondary throttle shaft by said vacuum operated means.

Claim 21

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to deliver a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, a hollow stationary hub, a member mounted to turn on the hub, means for applying a force to said member to cause it to turn in one direction, resilient means connected to turn the member in the other direction, means connecting said member to turn one of said shafts, and means for coordinating turning movements of said shafts.

Claim 22

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to deliver a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, a hollow stationary hub, a member mounted to turn on the hub, means for applying a force to said member to cause it to turn in one direction, resilient means connected to turn the member in the other direction, means connecting said member to turn one of said shafts, and means for coordinating turning movements of said shafts.

Claim 23

The combination set forth in claim 16 in which said hollow hub member receives the shaft for the auxiliary throttle valve.

Claim 24

The combination set forth in claim 16 in which said hollow hub member receives an intermediate shaft positioned between said throttle shafts.

Claim 25

The combination set forth in claim 16 in which the latter said means includes adjusting means for changing the angular position of the auxiliary throttle valve with respect to the primary throttle valve.

Claim 26

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage and a secondary passage each adapted to deliver a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, said means including two hollow stationary hubs, the first hub encircling a portion of the principal throttle shaft and the second hub encircling a portion of the secondary throttle shaft, a first member mounted to turn on the first hub and having means for connection to a throttle actuator, means connecting said first member to the primary throttle shaft, a second member mounted to turn on the second hub and connected to the secondary throttle shaft, means for causing turning movement of the second member after said first member has turned through a predetermined arc of travel, and Means for coordinating turning movement of the primary throttle shaft and the auxiliary throttle shaft.

Claim 27

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage and a secondary passage each adapted to deliver a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, each of said passages having a throttle valve therein mounted on a throttle shaft, means mounting said throttle shafts for turning movement about parallel axes, said means including two hollow stationary hubs, the first hub encircling a portion of the principal throttle shaft and the second hub encircling a portion of the secondary throttle shaft, a first member mounted to turn on the first hub and having means for connection to a throttle actuator, means connecting said first member to the primary throttle shaft, a second member mounted to turn on the second hub and connected to the secondary throttle shaft, means for causing turning movement of the second member after said first member has turned through a predetermined arc of travel, and Means for coordinating turning movement of the primary throttle shaft and the auxiliary throttle shaft.

Claim 28

The combination set forth in claim 20 in which the latter said means includes adjusting means for changing the angular position of the auxiliary throttle valve with respect to the primary throttle valve.

Claim 29

The combination set forth in claim 20 in which the means for causing turning movement of the second member includes a spring acting to turn the second member, a cam on the first member and a follower on the second member for limiting motion of the second member under force applied by the spring.

Claim 30

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to supply a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to supply a rich mixture to the auxiliary combustion chamber of the engine, each of the passages having a throttle valve therein carried on a shaft, means mounting said shafts for turning movement, an actuator member mounted to turn about the axis of the primary throttle shaft, means connecting said actuator member to said primary throttle shaft, a first torsion spring resisting turning movement of said actuator member in a direction to open said primary throttle valve, a second member mounted to turn about said axis, a second torsion spring operatively interposed between said actuator member and said second member, a dash-pot device including a rod pivotally connected to said second member and acting to limit the rate of turning movement of said member in a direction corresponding to closing movement of said throttle valve, said rod having a limited stroke, means whereby said second member may turn the actuator member in the opposite direction until said rod reaches the limit of its stroke, whereby turning movement of the actuator member to open the primary throttle valve is first resisted only by the first said torsion spring until said rod reaches the limit of its stroke and whereby continued turning movement of said actuator in the same direction is resisted by both said torsion springs, and means for coordinating the movements of the primary throttle shaft and the auxiliary throttle shaft.

Claim 31

A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a primary passage adapted to supply a lean mixture to the main combustion chamber of the engine, an auxiliary passage adapted to supply a rich mixture to the auxiliary combustion chamber of the engine, each of the passages having a throttle valve therein carried on a shaft, means mounting said shafts for turning movement, an actuator member mounted to turn about the axis of the primary throttle shaft, means connecting said actuator member to said primary throttle shaft, a first torsion spring resisting turning movement of said actuator member in a direction to open said primary throttle valve, a second member mounted to turn about said axis, a second torsion spring operatively interposed between said actuator member and said second member, a dash-pot device including a rod pivotally connected to said second member and acting to limit the rate of turning movement of said member in a direction corresponding to closing movement of said throttle valve, said rod having a limited stroke, means whereby said second member may turn the actuator member in the opposite direction until said rod reaches the limit of its stroke, whereby turning movement of the actuator member to open the primary throttle valve is first resisted only by the first said torsion spring until said rod reaches the limit of its stroke and whereby continued turning movement of said actuator in the same direction is resisted by both said torsion springs, and means for coordinating the movements of the primary throttle shaft and the auxiliary throttle shaft.