Smart key reminder system for a vehicle

1. A smart key reminder system for a vehicle with a vehicle cabin, comprising:

a vehicle-installed control system operable to:

identify whether the vehicle is operating,

identify a communicative wireless smart key, a location of the communicative wireless smart key with respect to the vehicle and whether the communicative wireless smart key is within a predefined distance from the vehicle,

identify whether another wireless smart key is within the vehicle cabin, and

when the vehicle is operating, the communicative wireless smart key is identified as not being within the predefined distance from the vehicle, and another wireless smart key is not identified as being within the vehicle cabin, send an alert to the communicative wireless smart key.

2. The system as recited in claim 1 , wherein the predefined distance from the vehicle includes the vehicle cabin.

3. The system as recited in claim 1 , wherein identifying the location of the communicative wireless smart key with respect to the vehicle includes identifying whether the communicative wireless smart key is within a predetermined range of the vehicle.

4. The system as recited in claim 1 , wherein identifying the location of the communicative wireless smart key with respect to the vehicle includes triangulating the location of the communicative wireless smart key with respect to the vehicle.

5. The system as recited in claim 4 , wherein triangulating the location of the communicative wireless smart key with respect to the vehicle includes determining at least one of a speed, a direction and a velocity of the communicative wireless smart key with respect to the vehicle.

6. The system as recited in claim 4 , wherein the control system is further operable to:

predict, from the triangulated location of the communicative wireless smart key with respect to the vehicle, whether a user carrying or wearing the communicative wireless smart key is walking away from the vehicle with the communicative wireless smart key in their possession, and

when the vehicle is operating, it is predicted that the user carrying or wearing the communicative wireless smart key is walking away from the vehicle with the communicative wireless smart key in their possession, the communicative wireless smart key is identified as not being within the predefined distance from the vehicle, and another wireless smart key is not identified as being within the vehicle cabin, send the alert to the communicative wireless smart key.

7. The system as recited in claim 1 , further comprising:

the communicative wireless smart key, the communicative wireless smart key operable to:

receive the alert, and

issue a warning to a user carrying or wearing the communicative wireless smart key in response to the alert.

8. The system as recited in claim 7 , wherein the warning is for the user not to leave the vehicle while the vehicle is operating and while still in possession of the communicative wireless smart key.

9. The system as recited in claim 7 , wherein the warning is for the user not to leave another user without a key to the vehicle while the vehicle is operating.

10. The system as recited in claim 7 , wherein the communicative wireless smart key issues the warning at least in part by vibrating.

11. The system as recited in claim 7 , wherein the communicative wireless smart key is a key fob.

12. The system as recited in claim 7 , wherein:

the communicative wireless smart key is a personal electronic device with GPS capability, and is further operable to communicate its GPS position, and

the control system is further operable to receive the GPS position of the communicative wireless smart key, and identify the location of the communicative wireless smart key with respect to the vehicle based on its GPS position.

13. The system as recited in claim 1 , further comprising:

a vehicle-installed sensor system in communication with the control system, the sensor system operable to:

determine whether the communicative wireless smart key is within a predetermined range of the vehicle, and

communicate corresponding signals to the control system from which the control system is operable to identify whether the communicative wireless smart key is within the predefined distance from the vehicle.

14. The system as recited in claim 1 , further comprising:

a vehicle-installed head unit in communication with the control system, wherein the control system is operable to send the alert to the head unit, and the head unit is operable to issue a warning to a user in the vehicle cabin in response to the alert that the user is being left without a key to the vehicle while the vehicle is operating.

15. A method for alerting a user of a vehicle with a vehicle cabin that the vehicle remains operating, comprising:

with a vehicle-installed control system:

identify whether the vehicle is operating,

identify a communicative wireless smart key, a location of the communicative wireless smart key with respect to the vehicle and whether the communicative wireless smart key is within a predefined distance from the vehicle,

identify whether another wireless smart key is within the vehicle cabin, and

when the vehicle is operating, the communicative wireless smart key is identified as not being within the predefined distance from the vehicle, and another wireless smart key is not identified as being within the vehicle cabin, send an alert to the communicative wireless smart key.

16. The method as recited in claim 15 , further comprising:

with the control system:

triangulating the location of the communicative wireless smart key with respect to the vehicle as part of identifying its location with respect to the vehicle,

predict, from the triangulated location of the communicative wireless smart key with respect to the vehicle, whether a user carrying or wearing the communicative wireless smart key is walking away from the vehicle with the communicative wireless smart key in their possession, and

when the vehicle is operating, it is predicted that the user carrying or wearing the communicative wireless smart key is walking away from the vehicle with the communicative wireless smart key in their possession, the communicative wireless smart key is identified as not being within the predefined distance from the vehicle, and another wireless smart key is not identified as being within the vehicle cabin, send the alert to the communicative wireless smart key.

17. The method as recited in claim 15 , further comprising:

with the communicative wireless smart key:

receive the alert, and

issue a warning to a user carrying or wearing the communicative wireless smart key in response to the alert.

18. The method as recited in claim 17 , wherein the warning is at least one of for the user not to leave the vehicle while the vehicle is operating and while still in possession of the communicative wireless smart key and for the user not to leave another user without a key to the vehicle while the vehicle is operating.

19. The method as recited in claim 15 ,

with a vehicle-installed sensor system in communication with the control system:

determine whether the communicative wireless smart key is within a predetermined range of the vehicle, and

communicate corresponding signals to the control system from which the control system is operable to identify whether the communicative wireless smart key is within the predefined distance from the vehicle.

20. The method as recited in claim 15 , further comprising:

with the control system, send the alert to a vehicle-installed head unit in communication with the control system; and

with the head unit, issue a warning to a user in the vehicle cabin in response to the alert that the user is being left without a key to the vehicle while the vehicle is operating.