Patent Document ID: 7856307
Application ID: 12562135
Patent Flag: 1

Claim One:
1. A fuel injection control device for a multi-fuel engine, comprising: an oxygen concentration sensor configured to detect an oxygen concentration in an exhaust gas; an alcohol concentration learning unit configured to learn an alcohol concentration in an injected fuel based on the oxygen concentration detected by the oxygen concentration sensor; an alcohol concentration memory configured to store a learning value corresponding to the oxygen concentration; a fuel injection amount controller configured to control a fuel injection amount based on the learning value; a corrector configured to reduce the fuel injection amount corresponding to the learning value for a predetermined time period when the learning value is higher than a threshold value when an engine is started; and a reviewer configured to review the learning value to provide a revised learning value based on the oxygen concentration while the corrector reduces the fuel injection amount, the fuel injection amount being controlled based on the revised learning value after the corrector reduces the fuel injection amount.