Patent ID: 8360505

Claim:
A vehicle door opening device configured to open a vehicle door of a vehicle with a vehicle body having a striker, the vehicle door opening device comprising; an operating unit configured to instruct opening and closing the vehicle door; a fully-open latch positioned in the vehicle door, the fully-open latch configured to engage with the striker of a vehicle body so as to hold the vehicle door in a fully-open position of the vehicle door; a fully-open release actuator positioned in the door, the fully-open release actuator being configured to disengage the fully-open latch from the striker so as to allow the door to close; a power drive provided in the vehicle body and configured to close the vehicle door, the power drive comprising a rotation sensor positioned in a rotary drum; a power source configured to supply electric power to the fully-open release actuator and the power drive; and a control module comprising: an SW input circuit configured to respond to the operating unit, a CPU connected to the SW input circuit, and the CPU configured to store a target velocity corresponding to a traveling direction and a position of the door, and a voltage detecting circuit connected to the CPU and configured to detect actual voltage of the power source, wherein the CPU is configured to store, as a maximum calculated value, a velocity obtained when actual voltage of the power source is a maximum voltage, and to store, as a minimum calculated value, a velocity obtained when actual voltage of the power source is a minimum voltage, and said control module is configured to transmit a stop signal for releasing of the fully-open release actuator when the control module determines the position of the door, such that the determining of the position of the door is based on the actual voltage of the power source detected, the door position being determined according to the actual voltage of the power source detected, wherein the door position is determined as being closer to a fully-open position as the actual voltage of the power source detected gets higher.