Turn signal cancelling device for vehicle

1. A turn signal cancelling device for a vehicle, the turn signal cancelling device comprising:

a turn signal cancellation control unit configured to automatically deactivate a turn signal; and

a vehicle speed detector configured to detect a vehicle speed;

wherein in a case where one of a left turn signal and a right turn signal has been activated and where an operation for giving an instruction to activate another of a left turn signal and a right turn signal is performed before a first predetermined time has passed or before the vehicle has travelled a first predetermined distance since an operation for giving an instruction to activate the one of the left turn signal and the right turn signal is performed when the vehicle speed is equal to or higher than a predetermined speed, the turn signal cancellation control unit automatically deactivates the other of the left turn signal and the right turn signal after a second predetermined time has passed or after the vehicle has travelled a second predetermined distance since the operation for giving the instruction to activate the other of the left turn signal and the right turn signal.

2. The turn signal cancelling device for the vehicle according to claim 1 , wherein in a case where the operation for giving the instruction to activate the other of the left turn signal and the right turn signal is performed in a state of the vehicle speed being lower than the predetermined speed and the one of the left turn signal and the right turn signal operating, the turn signal cancellation control unit automatically deactivates the other of the left turn signal and the right turn signal after the vehicle has travelled a third predetermined distance since the operation for giving the instruction to activate the other of the left turn signal and the right turn signal.

3. The turn signal cancelling device for the vehicle according to claim 1 , wherein in a case where one of the left turn signal and the right turn signal is already operating when an operation of turning on an ignition switch is performed, the turn signal cancellation control unit automatically deactivates the one of the left turn signal and the right turn signal after the vehicle has travelled a third predetermined distance since the operation of turning on the ignition switch, and in a case where neither the left turn signal nor the right turn signal is operating when the operation of turning on the ignition switch is performed, the turn signal cancellation control unit automatically deactivates one of the left turn signal and the right turn signal after the vehicle has travelled the third predetermined distance since the operation for giving the instruction to activate the one of the left turn signal and the right turn signal.

4. A turn signal cancelling device for a vehicle, the turn signal cancelling device comprising:

a vehicle speed detector configured to detect a vehicle speed; and

a computer processing unit configured to automatically deactivate a turn signal, wherein in a case where a first turn signal has been activated and an activation of a second turn signal is performed before a first predetermined time has passed or before the vehicle has travelled a first predetermined distance since the activation of the first turn signal is performed when the vehicle speed is equal to or higher than a predetermined speed, the turn signal cancellation control unit automatically deactivates the second turn signal after a second predetermined time has passed or after the vehicle has travelled a second predetermined distance since the activation of the second turn signal.

5. The turn signal cancelling device for the vehicle according to claim 1 , wherein in a case where the activation of the second turn signal is performed in a state of the vehicle speed being lower than the predetermined speed and the first turn signal is operating, the turn signal cancellation control unit automatically deactivates the second turn signal after the vehicle has travelled a third predetermined distance since the activation of the second turn signal.

6. The turn signal cancelling device for the vehicle according to claim 1 , wherein in a case where the first turn signal is already activated when an operation of turning on an ignition switch is performed, the turn signal cancellation control unit automatically deactivates the first turn signal after the vehicle has travelled a third predetermined distance since the operation of turning on the ignition switch, and in a case where neither the first turn signal nor the second turn signal is activated when the operation of turning on the ignition switch is performed, the turn signal cancellation control unit automatically deactivates the first turn signal after the vehicle has travelled the third predetermined distance since the activation of the first turn signal.

7. A method for cancelling a turn signal of a vehicle by operation of an electronic control system, said method comprising the steps of:

detecting the activation of a first turn signal;

starting an electronic timer and initiating operation of a travel distance detector when the activation of the first turn signal is initially detected;

detecting the activation of a second turn signal after the activation of the first turn signal has been detected;

determining the vehicle speed using input from a wheel rotational speed sensor;

determining that a necessary condition is met, which is that the activation of the second turn signal occurred either before a first predetermined time has passed or before the vehicle has travelled a first predetermined distance since the activation of the first turn signal, based on input received from the electronic timer and the travel distance detector at a time when the vehicle speed is equal to or higher than a predetermined speed; and

after determining that the necessary condition is met, sending a signal from the electronic control system and thereby deactivating the second turn signal after a second predetermined time has passed or after the vehicle has travelled a second predetermined distance since the activation of the second turn signal.

8. The method for cancelling a turn signal of a vehicle according to claim 7 , further comprising the steps of:

determining that the activation of the second turn signal is performed in a state of the vehicle speed being lower than the predetermined speed and the first turn signal is operating; and

deactivating the second turn signal after the vehicle has travelled a third predetermined distance since the activation of the second turn signal.

9. The method for cancelling a turn signal of a vehicle according to claim 7 , further comprising the steps of:

determining that the first turn signal is already activated when an operation of turning on an ignition switch is performed;

deactivating the first turn signal after the vehicle has travelled a third predetermined distance since the operation of turning on the ignition switch;

determining that neither the first turn signal nor the second turn signal is activated when the operation of turning on the ignition switch is performed; and

deactivating the first turn signal after the vehicle has travelled the third predetermined distance since the activation of the first turn signal.