Selectable range remote entry system

• US 7,292,134 B2
• Filed: 11/01/2004
• Issued: 11/06/2007
• Est. Priority Date: 11/01/2004
• Status: Expired due to Fees

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: King, Ronald O., Nantz, John, Tang, Qingfeng, Turovsky, Art, Conner, Bruce, Honkanen, Matthew, Kovac, Zoran
• Primary Examiner(s): Hofsass; Jeffery
• Assistant Examiner(s): AU, SCOTT D
• Application Number:
  US10/979,441
• Publication Number:
  US 20060091997A1
• Time in Patent Office: 1,100 Days
• Field of Search: 340/5.64, 340/5.72
• US Class Current: 340/5.64
• CPC Class Codes: B60R 25/1003 Alarm systems characterised by arm or disarm features
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00793 by Hertzian waves

Abstract

A vehicle remote entry system is provided which includes a keyless entry module for controlling the actuation of at least one vehicle entry function. A remote entry device for transmitting a wireless signal to the remote keyless entry module for activating the at least one vehicle entry function. A human machine interface for selecting at least one vehicle operating parameter including a signal range limitation setting for defining an operating range of the wireless signal for actuating the at least one vehicle entry function. The human machine interface provides the signal range limitation setting to the remote keyless entry module and a controller determines whether the wireless vehicle entry signal is within the signal range limitation setting for allowing actuation of the at least one vehicle entry function.

Claims

1. A vehicle remote entry system comprising:

a keyless entry module including a controller for controlling the actuation of at least one vehicle entry function;

a remote entry device for transmitting a wireless signal to said keyless entry module for activating said at least one vehicle entry function;

a human machine interface for selecting at least one vehicle operating parameter including a signal range limitation setting for defining an operating range of said wireless signal for actuating said at least one vehicle entry function;

wherein said human machine interface provides said signal range limitation setting to said remote keyless entry module, and wherein said controller determines whether said wireless vehicle entry signal is within said signal range limitation setting for allowing actuation of said at least one vehicle entry function.

2. The remote entry system of claim 1 wherein said signal range limitation setting includes a plurality of selectable operating ranges.

3. The remote entry system of claim 1 wherein said remote entry device includes a key fob.

4. The remote entry system of claim 1 wherein said keyless entry module includes a receiving circuit for determining a distance of said remote entry device to said keyless entry module in response to said transmitted wireless signal.

5. The remote entry system of claim 4 wherein said receiving circuit measures a received signal strength for determining said distance.

6. The remote entry system of claim 1 wherein said at least one vehicle entry function includes a door unlock function.

7. The remote entry system of claim 1 wherein said at least one vehicle entry function includes a door lock function.

8. The remote entry system of claim 1 wherein said at least one vehicle entry function includes a trunk unlatch function.

9. The remote entry system of claim 1 wherein said at least one vehicle entry function includes a vehicle anti-theft device.

10. A method for selectively actuating a vehicle entry function based on the range of a transmitted wireless signal between a remote entry device and a vehicle based keyless entry module, the method comprising the steps of:

selecting a signal range limitation selling from a plurality of operating ranges;

storing said selected range limitation setting in a memory of said keyless entry module;

receiving said wireless signal from said remote entry device;

determining a transmitted distance of said transmitted wireless signal between said remote entry device and said keyless entry module;

comparing said distance of said wireless signal to said signal range limitation setting stored in said memory;

determining if said distance of said transmitted wireless signal is within said signal range limitation setting; and

actuating a vehicle entry function in response to said wireless signal being within said signal range limitation setting.

11. The method of claim 10 wherein said step of determining said distance includes determining a received signal strength indicator.

12. The method of claim 11 wherein said received signal strength indicator is proportional to a power of the wireless transmitted signal.

13. The method of claim 10 wherein at least one signal range limitation setting provides an operating range for a plurality of vehicle entry functions.

14. The method of claim 10 wherein a plurality of signal range limitation settings provides an operating range for a plurality of vehicle entry functions, respectively.