Patent Document ID: 20100094526
Application ID: 12444764
Patent Flag: 0

Claim One:
1. An internal combustion engine system including an internal combustion engine equipped with a port fuel injection valve arranged to inject a fuel into an intake port and with an in-cylinder fuel injection valve arranged to directly inject the fuel into each cylinder, the internal combustion engine system comprising: a learning execution module configured to perform learning under fuel injection from the port fuel injection valve in a specified operation state of the internal combustion engine; an auto stop-permitting water temperature setting module configured to, on completion of the learning, set a first temperature to an auto stop-permitting water temperature that allows an auto stop of the internal combustion engine, and on incompletion of the learning, set a second temperature that is higher than the first temperature to the auto stop-permitting water temperature; a cooling water temperature detection unit constructed to measure temperature of cooling water in the internal combustion engine; and an auto stop restart controller configured to automatically stop operation of the internal combustion engine upon satisfaction of preset auto stop conditions including a condition that the measured temperature of cooling water is not lower than the set auto stop-permitting water temperature and to automatically restart the operation of the internal combustion engine upon satisfaction of preset auto restart conditions in an auto stop state of the internal combustion engine.