PASSIVE ENTRY SYSTEM FOR AN AUTOMOTIVE VEHICLE

• US 20090284345A1
• Filed: 05/15/2008
• Published: 11/19/2009
• Est. Priority Date: 05/15/2008
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Tarmoom, Ehab Abdulla, Ghabra, Riad
• Granted Patent: US 8,531,268 B2
• Time in Patent Office: Days
• US Class Current: 340/5.610
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: B60R 25/406 Power supply in the remote key
• CPC Class Codes: G07C 2009/00373 whereby the wake-up circuit is situated in the lock
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

A passive entry system for an automotive vehicle may include a token capable of receiving a plurality of wireless signals. The token may generate a response signal to at least one of the plurality of wireless signals and reconfigure so that the token does not provide a response to at least one of the plurality of wireless signals.

Claims

1. A passive entry system for an automotive vehicle having a cabin comprising:

a control unit configured to broadcast a plurality of wake-up signals to prompt a token to power-up if the token is in a low-power consumption mode; and

a token capable of recognizing at least one of the plurality of wake-up signals and of generating a response signal for the control unit in response to recognizing the at least one of the plurality of wake-up signals, the control unit further configured to determine if the token is located in the cabin based on the response signal and to broadcast a reconfiguration signal to prompt the token to reconfigure so that the token does not recognize wake-up signals broadcast subsequent to the reconfiguration signal if the token is located in the cabin.

2. The system of claim 1 wherein each of the plurality of wake-up signals includes information indicative of a control unit identifier and wherein the token is further configured to compare at least one of the control unit identifiers with a stored identifier.

3. The system of claim 2 wherein the token includes a receiver and wherein the stored identifier is stored within a memory of the receiver.

4. The system of claim 2 wherein the token recognizes at least one of the plurality of wake-up signals if the at least one control unit identifier matches the stored identifier.

5. The system of claim 2 wherein the token is further capable of altering the stored identifier in response to receiving the reconfiguration signal.

6. The system of claim 5 wherein the token is further capable of restoring the stored identifier in response to receiving another reconfiguration signal.

7. The system of claim 5 wherein the token is further capable of restoring the stored identifier in response to at least one of a button press and a power on reset event.

8. A passive entry system for an automotive vehicle having a cabin comprising:

a control unit configured to broadcast a plurality of signals; and

a token capable of generating a response signal for the control unit based on one of the plurality of signals, the control unit further configured to determine if the token is located in the cabin based on the response signal and to broadcast a reconfiguration signal to prompt the token to reconfigure so that the token does not generate the response signal to at least some signals broadcast by the control unit subsequent to the reconfiguration signal.

9. The system of claim 8 wherein the token includes a receiver and is further capable of deactivating the receiver in response to receiving the reconfiguration signal.

10. The system of claim 8 wherein at least one of the plurality of signals includes information indicative of a control unit identifier and wherein the token includes a stored identifier and is further capable of recognizing the at least one of the plurality of signals if the control unit identifier matches the stored identifier.

11. The system of claim 10 wherein the token is further capable of altering the stored identifier in response to receiving the reconfiguration signal.

12. The system of claim 11 wherein the token is further capable of restoring the stored identifier in response to receiving another reconfiguration signal.

13. The system of claim 11 wherein the token is further capable of restoring the stored identifier in response to at least one of a button press and a power on reset event.

14. The system of claim 8 wherein the token includes a transmitter and is further capable of inhibiting broadcasting response signals via the transmitter in response to receiving the reconfiguration signal.

15. The system of claim 8 wherein the token comprises a key fob.

16. A passive entry system for an automotive vehicle comprising:

a token capable of receiving a plurality of wireless signals and configured to (i) determine if a predetermined number of wireless signals has been received, (ii) generate a response signal to at least one of the plurality of wireless signals if the number of received wireless signals is less than the predetermined number of wireless signals, and (iii) reconfigure so that the token does not provide a response to at least one of the plurality of wireless signals if the number of received wireless signals is greater than the predetermined number of wireless signals.

17. The system of claim 16 wherein the token includes a receiver and wherein the token disables the receiver if the number of received wireless signals is greater than the predetermined number of wireless signals.

18. The system of claim 16 wherein the token includes a transmitter to transmit the response signal and wherein the token is further configured to disable the transmitter if the number of received wireless signals is greater than the predetermined number of wireless signals.

19. The system of claim 18 wherein the token is further configured to re-enable the transmitter in response to at least one of a button press and a power on reset event.

20. The system of claim 16 wherein the token is further configured to recognize at least one of the plurality of wireless signals if a received identifier matches a stored identifier and to alter the stored identifier during reconfiguration.