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US 2011/0253102 A1Published application
System for supplementary fuel supply
AssigneeWalbro Engine Management, L.L.C.
InventorTsuyoshi Watanabe
Life of this patent
Estimating the term…
Abstract
Supply of supplementary fuel is controlled by activation of a valve in response to certain engine operating conditions or parameters. For example, the supplementary fuel may be supplied to facilitate starting and warming up a cold engine, or to cool and/or slow down an engine operating above a threshold speed.
Claims15
A method of controlling supply of supplementary fuel through a supplementary fuel supply passage in a carburetor for an engine, comprising:
- providing an electromechanical valve in fluid communication with the supplementary fuel supply passage;
- determining engine speed;
- and
- powering the electromechanical valve as a function of the engine speed when the engine speed is above a threshold speed.
1 more element
A system to supply supplementary fuel to an engine, comprising:
- a carburetor having a fuel chamber, a mixing passage through which air and fuel are delivered to the engine and a supplementary fuel passage communicating the fuel chamber with the mixing passage;
- an electromechanical valve normally closing the supplementary fuel passage;
- and
- a magneto device including a flywheel with a magnet group and a lamstack having a first leg carrying a coil, wherein the flywheel magnet group and the lamstack first leg are configured such that the valve is powered to open the passage by current created by the magnet group rotating past the lamstack first leg as engine speed exceeds a threshold.
1 more element
Dependencies are inferred from the claim text.