Electronic control diaphragm carburetor
AssigneeZama Japan Kabushiki Kaisha
InventorScott R. Shaw
Life of this patent
Estimating the term…
Abstract
A diaphragm carburetor is disclosed wherein a mechanism for varying the fuel flow rate through the carburetor for delivery to the engine can be controlled by electronic feedback based on engine performance. A permanent magnet/wire coil assembly is attached to the diaphragm controlling the opening to the metering chamber within the carburetor. The assembly responds to commands based on engine performance and can vary the size of the opening to the metering chamber. In this way, the fuel flow rate through the carburetor can be modified to obtain the optimal fuel/air ratio for peak performance of the engine.
Claims24
A diaphragm carburetor, comprising:
- a constant pressure fuel chamber,
- a control valve that controls fuel flow into the constant pressure fuel chamber,
- a metering diaphragm coupled to the control valve and separating the constant pressure fuel chamber from an air chamber, and
- a control unit coupled to the metering diaphragm and adapted to bias the metering diaphragm inwardly and outwardly relative to the control valve to override air pressure activated movement of the metering diaphragm to increase and decrease fuel flow from the constant pressure fuel chamber into an air intake path.
A diaphragm carburetor, comprising:
- a metering diaphragm that controls the opening and closing of a control valve that controls fuel flow into a metering chamber;
- and
- a control member attached to the metering diaphragm for manipulating the metering diaphragm's control of the control valve by biasing the metering diaphragm inwardly and outwardly relative to the control valve, wherein the control member comprising an electro-magnet attached to the metering diaphragm, wherein the electro-magnet comprises a magnet and a wire coil surrounding the magnet, wherein the position of the metering diaphragm and the resultant position of the control valve can be controlled by manipulating an electric current passing through the wire coil to manipulate the direction and degree to which the magnet travels relative to the wire coil.
A diaphragm carburetor, comprising:
- a constant pressure fuel chamber,
- a control valve that controls fuel flow into a metering chamber,
- a metering diaphragm coupled to the control valve and separating the constant pressure fuel chamber from an air chamber, and
- a control unit coupled to the metering diaphragm and adapted to bias the metering diaphragm inwardly and outwardly to increase and decrease the level of vacuum required to draw fuel from the fuel chamber wherein the control member comprises an electro-magnet attached to the metering diaphragm,
- wherein the electromagnet comprises a magnet and a wire coil surrounding the magnet, wherein the position of the metering diaphragm and the resultant position of the control valve can be controlled by manipulating an electric current passing through the wire coil to manipulate the direction and degree to which the magnet travels relative to the wire coil control unit.
Dependencies are inferred from the claim text.