US 5,311,849 AGranted

Carburetor assembly for an internal combustion gas engine

AssigneeGas Research Institute

InventorsJohn E. Lambert, Larry E. Schluer, Douglas Dickson

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Abstract

A carburetor assembly having a venturi element for fuel metering and a throttle valve for controlling the flow of an air and natural gas mixture to the combustion chamber of an internal combustion gas engine wherein a stepper motor is used to angularly position a throttle valve plate in the gas flow path to the carburetor, the throttle valve plate being carried on a throttle valve shaft that forms an extension of the armature of the stepper motor wherein provision is made for sealing the stepper motor at a location on the axis of rotation of the throttle valve element, the throttle valve shaft being mounted without the necessity for using throttle valve shaft bearings or a separate seal, thereby minimizing friction and any tendency for a misalignment to occur.

Claims6

Dependent claims

A carburetor for a gas engine comprising a throttle body, an air inlet passage in said throttle body adapted to communicate with an air/fuel mixture inlet flow conduit;

a shaft opening in said throttle body extending in a direction transverse to said inlet passage;
an electric actuator motor mounted in said throttle body on the exterior thereof and having an armature shaft extending into said shaft opening;
a throttle blade shaft in said shaft opening;
a throttle blade in said inlet flow conduit, a mechanical connection between said throttle blade and said throttle blade shaft whereby rotary adjustment of said throttle blade shaft by said motor effects opening and closing of said inlet flow conduit;
and
said throttle blade shaft being carried by and driven by said armature shaft and being supported entirely by said armature shaft.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/914,360Filed 14 Jul 1992
Granted: 17 May 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F02D 19/023
Control of components of the fuel supply system: to adjust the fuel mass or volume flow
F02D 9/10
Throttle valves specially adapted therefor; Arrangements of such valves in conduits: having pivotally-mounted flaps
F02D 11/10
Characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance: of the…
F02M 21/0239
Valves; Pressure or flow regulators in the fuel supply or return system: pressure or flow regulators therefor