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US 9,989,016 B2Granted
Electronic controlled fuel enrichment system
AssigneeWalbro Corporation
InventorMatthew A. Braun
Life of this patent
Estimating the term…
Abstract
An apparatus for delivering a fuel-air mixture to an engine is provided. The apparatus includes: a carburetor having one or more passages and one or more chambers, wherein at least some of the passages and chambers are in communication with one another; and a fluid pump communicated with the carburetor and pumping fluid into or out of the carburetor to influence an fuel-to-air ratio of a fuel and air mixture delivered from the carburetor.
Claims15
An apparatus for delivering a fuel-air mixture to an operating engine, comprising:
- a carburetor having a fuel and air mixing passage for supplying a fuel and air mixture to an operating engine, a fuel metering system having a flexible diaphragm defining at least in part on one side a fuel metering chamber connected to and supplying fuel to the fuel and air mixing passage and on another side of the flexible diaphragm defining at least in part a reference chamber;
- a piezo-electric fluid pump in fluid communication with one of the fuel metering chamber or the reference chamber and configured to change a fuel-to-air ratio of a fuel and air mixture delivered from the carburetor to the operating engine;
- and
- an electronic controller configured to determine an instantaneous fuel demand of the operating engine and to control operation of the piezo-electric fluid pump to change the fuel-to-air ratio of the fuel and air mixture supplied by the carburetor to the operating engine in response to the determined instantaneous fuel demand of the operating engine.
1 more element
A system for delivering a fuel-air mixture to an operating engine, comprising:
- a carburetor having a fuel and air mixing passage for supplying a fuel and air mixture to an engine and a fuel chamber for supplying fuel to the fuel and air mixing passage;
- a piezo-electric pump having a passage separate from the fuel chamber and directly communicating with the fuel and air mixing passage and configured to supply fluid to such fuel and air mixing passage to change the fuel-to-air ratio of the fuel and air mixture delivered from the carburetor to the operating engine;
- and
- an electronic controller configured to determine an instantaneous fuel demand of the operating engine and to control operation of the piezo-electric pump to change the fuel-to-air ratio of the fuel and air mixture supplied by the carburetor to the operating engine in response to the determined instantaneous fuel demand of the operating engine.
1 more element
Dependencies are inferred from the claim text.