Gasoline engine system using variable direct ethanol...

Internal-combustion engines – Combustion chamber means combined with air-fuel mixture... – Having a single combustible mixture inlet combined with...

Reexamination Certificate

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C123S179400, C123S1980DB, C123S406310, C123S406320

Reexamination Certificate

active

07637250

ABSTRACT:
Fuel management system for operation of a spark ignition gasoline engine. The system includes a gasoline engine powering the vehicle and a source of gasoline for introduction into the engine. A source of an anti-knock fuel such as ethanol is provided. An injector directly injects the anti-knock fuel into a cylinder of the engine and the control system shuts down the engine by stopping gasoline and anti-knock agent flow into the engine during vehicle deceleration and idling and restarts the engine upon driver demand. Direct ethanol injection and engine shutdown results in efficiencies similar to those of full hybrid vehicles.

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Bromberg et al, Calculations of Knock Suppression In Highly Turbocharged Gasoline/Ethanol Engines Using Direct Ethanol Injection, Jul. 7, 2005, MIT Paper.

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