Opening and closing body control apparatus for a vehicle

An opening and closing body control apparatus for a vehicle, comprising:

• an assist control portion configured to
• determine an operation speed and an operation position of an opening and closing body of the vehicle while an operation of the opening and closing body is performed by a user to move the opening and closing body to open or close the opening and closing body;
• apply an assist voltage and an offset voltage alternately to a motor to apply a drive force to the opening and closing body while the operation of the opening and closing body is performed by the user, the assist voltage and the offset voltage being based on the operation speed and the operation position of the opening and closing body, the assist voltage being a voltage for rotating the motor at a rotation speed which corresponds to the operation speed of the opening and closing body, and the offset voltage being a voltage calculated by subtracting a predetermined offset value from the assist voltage;
• detect a decrease in the operation speed of the opening and closing body by
• obtaining a current operation speed of the opening and closing body,
• obtaining a stored operation speed of the opening and closing body, the stored operation speed being stored before the opening and closing body moves a predetermined stop determination distance, and
• calculating a difference between the current operation speed of the opening and closing body and the stored operation speed of the opening and closing body,
• determine that the operation of the opening and closing body by the user has stopped when the difference between the current operation speed of the opening and closing body and the stored operation speed of the opening and closing body is greater than or equal to a predetermined threshold, and
• stop the application of the drive force by the motor when it is determined that the operation of the opening and closing body by the user has stopped.