Ethanol engine system

An ethanol engine system comprising:

• a reservoir tank of an aqueous ethanol solution;
• a first supply device, including at least a first injector and a first pump, which supplies the aqueous ethanol solution in the reservoir tank to a reformer;
• a separator which separates a mixed gas into gas and liquid by cooling the mixed gas including a reformed gas fed from the reformer and condensing a water vapor included in the mixed gas;
• a reformed gas supply device, including at least a second injector and a second pump, which supplies the reformed gas separated by the separator to an engine;
• a recovery tank which collects a recovery solution separated in the separator;
• and
• a first recovery solution supply device, including at least a third injector and a third pump, which supplies the recovery solution in the recovery tank to the reformer and a second recovery solution supply device, including at least a fourth injector and a fourth pump, which supplies the recovery solution in the recovery tank directly to a combustion chamber of the engine.