Patent ID: 8511270

Claim:
An idle-stop operation control device that performs an idle-stop operation on a vehicle internal combustion engine, whereby an operation of the vehicle internal combustion engine is ceased in an idle operation state and an engine start-up operation is performed on the internal combustion engine from an operation-ceased state upon request by operating a starter motor using a power of a battery, the device comprising: a sensor configured to detect a terminal voltage of the battery; and a programmable controller that operates using a power supplied from the battery, the programmable controller being programmed to: determine if the controller is in a condition immediately after activation; determine that the controller has experienced a shutdown and restart in the course of the engine start-up operation when the controller is in a condition immediately after activation and the terminal voltage of the battery is lower than a restart determining value; and prevent the idle-stop operation from being executed on the internal combustion engine when the controller has experienced the shutdown and restart in the course of the engine start-up operation.