Fuel tank system for direct ethanol injection octane boosted gasoline engine
AssigneeEthanol Boosting Systems, LLC
InventorsLeslie Bromberg, Paul N. Blumberg, Daniel R. Cohn, John Heywood
Life of this patent
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Abstract
Fuel tank system for a direct ethanol injection octane boosted gasoline engine. The system includes a gasoline engine and a main fuel tank that contains a mix of gasoline and gasoline E85. A smaller secondary tank is provided to contain ethanol or E85. An injector directly injects in a separately controlled fashion ethanol or E85 into a cylinder of the engine to boost octane. A control module controls the relative amounts of gasoline and ethanol used and structure is provided for fueling the main and secondary fuel tanks.
Claims15
A system for a direct ethanol injection octane boosted gasoline engine comprising:
- a gasoline engine;
- a main fuel tank that contains gasoline or a mix of gasoline and E85;
- a smaller secondary tank containing E85;
- an injector for separately controlled, direct injection of E85 from the secondary tank into a cylinder of the engine to boost octane;
- a control module to control the relative amounts of gasoline and ethanol used;
- and
- means for fueling the main and secondary fuel tanks;
- wherein the control module reconfigures the capacities of the main and secondary fuel tanks.
A system for a direct ethanol injection octane boosted gasoline engine comprising:
- a gasoline engine;
- a main fuel tank that contains gasoline or a mix of gasoline and E85;
- a smaller secondary tank containing E85;
- an injector for direct, separately controlled, injection of E85 from the secondary tank into a cylinder of the engine to boost octane;
- a control module to control the relative amounts of gasoline and ethanol used;
- and
- means for fueling the main and secondary fuel tanks wherein the control module reconfigures the capacities of the main and secondary fuel tanks, and
- wherein the injector for direct injection of E85 from the secondary tank is also used to inject gasoline or E85 from the first tank and
- wherein the fuel/air mixture is substantially stoichiometric.
Dependencies are inferred from the claim text.