Carburetor having bidirectional fuel passage
AssigneeDavid Ward
InventorJames S. Jones
Life of this patent
Estimating the term…
Abstract
An improved bidirectional fuel passage carburetor includes an air density compensator and overall trim, an increased idle air and enrichment device, an air bounce check valve, a fuel valve shutoff, and a load enrichment device. In an alternate embodiment, the carburetor includes a load trim screw for adjustment the main fuel orifice. In yet another embodiment of the invention, temperature compensation for the air-fuel ratio is provided.
Claims6
A bidirectional fuel passage carburetor for an internal combustion engine, the carburetor being connected to a source of liquid fuel for establishing a fuel supply for the engine at an air-fuel ratio and being connected to the engine by an intake manifold, comprising:
- means for compensating for changes in air density;
- means for eliminating air bounce of an air diaphragm resulting from pressure pulses in said intake manifold;
- means for rapidly enriching said fuel supply upon load increase;
- warm up means responsive to below normal operating temperatures for increasing idle air flow and enriching said fuel supply;
- means for shutting off said connection to said source of liquid fuel when said engine is shut off;
- and
- means for adjusting said air-fuel ratio in compensation for ambient air temperature changes.
A bidirectional fuel passage carburetor for an internal combustion engine, the carburetor being connected to a source of liquid fuel for establishing a fuel supply for the engine at an air-fuel ratio and being connected to the engine by an intake manifold, comprising:
- warm up means including a bimetal strip for modulating a flow of air through a passage bypassing a main throttle in a main air flow through said carburetor;
- said bimetal strip being responsive to engine temperature by way of exhaust gases routed past said bimetal strip;
- and
- said flow of air modulated by said bimetal strip being routed through said carburetor to enrich the fuel mixture.
A bidirectional fuel passage carburetor for an internal combustion engine, the carburetor being connected to a source of liquid fuel for establishing a fuel supply for the engine at an air-fuel ratio and being connected to the engine by an intake manifold, comprising:
- means for compensating for changes in air density including an expandable bellows compartment responsive to air density;
- wherein said bellows compartment is located adjacent a booster venturi in a main air stream through said carburetor and is expandable and retractable to vary the cross-sectional area of said booster venturi in response to changes in air density;
- and
- wherein a signal from said booster venturi is communicated to an air diaphragm vacuum chamber to adjust said air-fuel ratio of said carburetor.
A bidirectional fuel passage carburetor for an internal combustion engine, the carburetor being connected to a source of liquid fuel for establishing a fuel supply for the engine at an air-fuel ratio and being connected to the engine by an intake manifold, comprising:
- means for eliminating air bounce of an air diaphragm resulting from pressure pulses in said intake manifold.
Dependencies are inferred from the claim text.