Patent ID: 8864187

Claim:
A door opening and closing system in a vehicle, comprising: a door opening and closing device including: a latch mechanism configured to make a door of a vehicle into a full latch state and a half latch state; a motor configured to drive the latch mechanism so as to open or close the door; and a latch switch configured to detect the states of the door; a controller configured to: generate an instruction when the half latch state is detected by the latch switch; and after, the instruction is generated, delay providing the instruction to the motor until a predetermined notice time, associated with a time for issuing a notice signal at the start of motor driving, and a subsequent predetermined recognition time, associated with a time for letting a user recognize the end of notice, elapse; and an announce mechanism configured to provide a signal indicative of a starting of the driving of the motor, to a user during the predetermined notice time in response to the instruction from the controller, wherein the motor drives the latch mechanism to make the door move from the half latch state to the full latch state after the notice time and the subsequent predetermined recognition time elapse from when the instruction is generated, and wherein a predetermined notice determination time threshold value, associated with a time required for normal automatic closing operation by the motor, is installed in the controller, and the controller stops the motor driving if the notice determination time threshold value is smaller than a time from the half latch state to full latch state.