US 4,046,844 AGranted

Carburetor construction

AssigneeBorg-Warner Corporation

InventorPaul Ellis Rickert

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Abstract

A carburetor construction is disclosed which includes a plurality of plate members stacked one upon the other, the plates including recesses and openings which define fuel channels, and cavities which nestibly receive various components of the carburetor, the components being designed so as to facilitate assembly with each other.

Drawings

Claims11

Dependent claims

A carburetor construction comprising:

a base plate having a substantially planar surface including an opening adapted for connection to an air inlet passage of an internal combustion engine, said opening defining a socket and said planar surface including a groove extending transversely with respect to said socket;
a throat member defining a fuel-air mixing passage mounted on said base plate having a mixture outlet portion thereof in alignment with said opening in said base plate, said throat member having an air inlet portion spaced from said mixture outlet portion and including fuel aperture means extending through a wall portion thereof between said air inlet portion and said mixture outlet portion, said throat member being received within said socket and including a pair of oppositely disposed slots aligned with said groove;
a rotatable throttle shaft extending through said slots and journalled in said groove, said throttle shaft including a throttle plate disposed in said mixture outlet portion of said throat member providing a variable restriction in said mixing passage;
and
a fuel module mounted on said base plate receiving said throat member including fuel channel means arranged and disposed for communication with a source of fuel and with said aperture means in said throat member, said base plate, throat member and fuel module being secured in interlocking engagement.

2 more elements

A carburetor construction comprising:

a base plate having a substantially planar surface including an opening adapted for connection to an air inlet passage of an internal combustion engine, and including a first recess defining a portion of a metering chamber;
a throat member defining a fuel-air mixing passage mounted on said base plate having a mixture outlet portion thereof in alignment with said opening in said base plate, said throat member having an air inlet portion spaced from said mixture outlet portion and including fuel aperture means extending through a wall portion thereof between said air inlet portion and said mixture outlet portion;
and
a fuel module mounted on said base plate receiving said throat member including fuel channel means arranged and disposed for communication with a source of fuel and with said aperture means in said throat member, said fuel module including a first resilient membrane, a metering plate, a second resilient membrane, and a cover plate stacked one upon the other and secured to said base plate, said metering plate including a recess formed in a lower surface thereof cooperating with said first recess and said first resilient membrane to form a portion of said metering chamber, said metering chamber communicating with said source of liquid fuel, said metering plate including a metering pocket communicating with said metering chamber, and an adjusting plug having a portion extending through said cover plate and having another portion received within said metering pocket, said extending portion of said plug including means for adjustably rotating said plug within said pocket, and said other portion of said plug including means for adjustably restricting communication between said metering chamber and pocket, said metering chamber and adjusting plug forming a portion of said fuel channel means.

1 more element

Dependencies are inferred from the claim text.

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Abstract

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Drawings

Claims11

Dependent claims

A carburetor construction comprising:

a base plate having a substantially planar surface including an opening adapted for connection to an air inlet passage of an internal combustion engine, said opening defining a socket and said planar surface including a groove extending transversely with respect to said socket;
a throat member defining a fuel-air mixing passage mounted on said base plate having a mixture outlet portion thereof in alignment with said opening in said base plate, said throat member having an air inlet portion spaced from said mixture outlet portion and including fuel aperture means extending through a wall portion thereof between said air inlet portion and said mixture outlet portion, said throat member being received within said socket and including a pair of oppositely disposed slots aligned with said groove;
a rotatable throttle shaft extending through said slots and journalled in said groove, said throttle shaft including a throttle plate disposed in said mixture outlet portion of said throat member providing a variable restriction in said mixing passage;
and
a fuel module mounted on said base plate receiving said throat member including fuel channel means arranged and disposed for communication with a source of fuel and with said aperture means in said throat member, said base plate, throat member and fuel module being secured in interlocking engagement.

2 more elements

A carburetor construction comprising:

a base plate having a substantially planar surface including an opening adapted for connection to an air inlet passage of an internal combustion engine, and including a first recess defining a portion of a metering chamber;
a throat member defining a fuel-air mixing passage mounted on said base plate having a mixture outlet portion thereof in alignment with said opening in said base plate, said throat member having an air inlet portion spaced from said mixture outlet portion and including fuel aperture means extending through a wall portion thereof between said air inlet portion and said mixture outlet portion;
and
a fuel module mounted on said base plate receiving said throat member including fuel channel means arranged and disposed for communication with a source of fuel and with said aperture means in said throat member, said fuel module including a first resilient membrane, a metering plate, a second resilient membrane, and a cover plate stacked one upon the other and secured to said base plate, said metering plate including a recess formed in a lower surface thereof cooperating with said first recess and said first resilient membrane to form a portion of said metering chamber, said metering chamber communicating with said source of liquid fuel, said metering plate including a metering pocket communicating with said metering chamber, and an adjusting plug having a portion extending through said cover plate and having another portion received within said metering pocket, said extending portion of said plug including means for adjustably rotating said plug within said pocket, and said other portion of said plug including means for adjustably restricting communication between said metering chamber and pocket, said metering chamber and adjusting plug forming a portion of said fuel channel means.

1 more element

Dependencies are inferred from the claim text.

Description6,589 words

Summary299 words

#1. Field

#The present invention is directed to improvements in carburetors and more particularly to improvements in the construction of carburetors wherein separately formed component members are combined to provide a carburetor assembly.

#2. Prior Art

Brief description of the drawings26 figures

#FIG. 1 is an exploded view of components of a carburetor construction according to the present invention;

#FIG. 2 is a top view of a carburetor assembled for components shown in FIG. 1;

#FIG. 3 is a side view of the carburetor shown in FIG. 2;

Detailed description5,822 words

#Referring initially to FIGS. 1-4 there is shown an improved carburetor construction 50, the components thereof being shown in disassembled relationship in FIG. 1. In somewhat more detail, the carburetor includes a base plate 51, a fuel module 52 including a metering plate 53 and a cover plate 54, a throat member 55 defining a mixing passage and a throttle member 56. Base plate 51, metering plate 53 and cover plate 54 include grooves, recesses, channels and openings, to be described in more detail hereinafter, which nestibly receive other components of the carburetor and serve to retain the various components in desired relationship to each other. In addition to the above named components, FIG. 1 shows a gasket 57, throttle return spring 58, lower diaphragm 59, fuel inlet valve 60, valve lever 61, valve spring 62, throttle adjusting screw 63, accelerator pump shoe 64, ball check 65, air bleed insert 66, upper diaphragm 67, accelerator pump return spring 68, high speed adjusting plug 69, idle adjusting plug 70, resilient collars 71, 72 for respective adjusting plugs, a sight glass 73, and retaining screws 74, 75, 76, 77.

#Referring now to FIGS. 5 and 6, the nested relation of components is shown to enlarged scale in vertical dimension while the longitudinal dimension has been distorted in an effort to show the path of the fuel channels in planar view, certain of the components being displaced for the sake of clarity in illustrating their functional interaction with adjacent components. The recesses and cavities shown schematically in FIGS. 5 and 6 are shown in true relationship in detailed views of the base plate, metering plate and cover plate found in FIGS. 18 through 25, to which reference may be had.

#Referring now to FIGS. 1, 4, 5 and 18, the base plate 51 will be described in more detail. Base plate 51 includes a lower surface 81 adapted for mounting on a flange surrounding the air inlet of an internal combustion engine. The upper surface of base plate 51 includes a substantially planar surface portion 82 interrupted by upstanding mounting bosses 83, 84, locating pins 85, 86, and by various grooves, recesses and openings described below. Mounting bosses 83, 84 include mounting holes 78, 79 to receive screws for securing the carburetor to an engine.

Abstract

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Claims11

Abstract

Drawings

Drawings

Claims11

Description6,589 words

Drawings

Description6,589 words

Classification6 codes

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