Ignition key-vehicle communication device which is protected against incorrect operation

• US 5,808,372 A
• Filed: 10/28/1996
• Issued: 09/15/1998
• Est. Priority Date: 10/26/1995
• Status: Expired due to Fees

• Current Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Original Assignee: Mercedes-Benz AG (Mercedes-Benz Group AG)
• Inventors: Brinkmeyer, Horst, Schwegler, Gunter
• Primary Examiner(s): Sircus, Brian
• Assistant Examiner(s): Ganjian, Peter
• Application Number:
  US08/738,702
• Time in Patent Office: 687 Days
• Field of Search: 307/9.1, 307/10.1, 307/10.2, 307/10.3, 307/10.4, 307/10.5, 307/10.6, 307/10.7, 307/10.8, 340/825.31, 340/825.32, 340/825.34, 340/825.67, 340/825.72, 340/825.54, 340/426, 180/287, 70/256, 70/257, 123/198 B, 123/198 DB, 123/198 DC, 364/423.098, 364/423.099, 364/424.034, 364/424.37, 364/424.38, 364/424.04, 364/424.045, 364/424.059
• US Class Current: 340/5.64
• CPC Class Codes: B60R 25/04 operating on the propulsion system, e.g. engine or drive motor
• CPC Class Codes: G07C 2009/00222 by more than one push button
• CPC Class Codes: G07C 2009/0023 with encription of the transmittted data signal
• CPC Class Codes: G07C 2009/00261 the keyless data carrier having more than one function
• CPC Class Codes: G07C 2009/00579 Power supply for the keyless data carrier
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

The invention provides an ignition key-vehicle communication device having at least one electronic key which can be inserted into a vehicle-end ignition lock. A wireless key-vehicle communication component arranged on the key actuates at least one vehicle-end functional unit by activating an activation element which is arranged at the key end. To protect against incorrect operation, means are provided for detecting when a key is inserted into the ignition lock and/or is inserted in a specific position in the ignition lock, and disabling communication between this key and the functional unit to be actuated in response thereto. The means for protecting against incorrect operation are arranged on the key.

Claims

1. Ignition key-vehicle communication arrangement for a vehicle having at least one remotely actuatable vehicle function, said arrangement comprising:

at least one ignition key which can be inserted into an ignition lock in said vehicle;

a communication component arranged on said ignition key for transmitting enabling data which actuate said at least one vehicle function;

an activation element arranged on the ignition key for causing said communication component to transmit data which actuate said at least one vehicle function; and

means for protecting against incorrect operation of said at least one vehicle function, said means comprising;

means for detecting insertion of said ignition key into a position in said ignition lock;

means responsive to a detection of said insertion of said ignition key, for disabling transmission of said enabling data by said communication component arranged on said ignition key.

2. Communication arrangement according to claim 1, wherein said position in said ignition lock comprises one of:

presence of said ignition key in said ignition lock in any position therein; and

orientation of said ignition key in a predetermined position in said ignition lock.

3. Communication arrangement according to claim 1, wherein said ignition key is an electronic key.

4. Communication arrangement according to claim 1, wherein said communication component comprises a wireless transmission device.

5. Communication arrangement according to claim 1, wherein said activation element is manually operable.

6. Communication arrangement according to claim 1, wherein:

said ignition key further comprises an external energy receiver which is linked to receive energy from a vehicle borne energy source when said ignition key is inserted into a position said ignition lock; and

said means for protecting against incorrect operation comprises a control unit arranged on said ignition key for detecting presence of external energy received by said energy receiver, and for disabling said communication component with respect to transmission of enabling data, in response thereto.

7. Communication arrangement according to claim 2, wherein:

said ignition key further comprises an external energy receiver which is linked to receive energy from a vehicle borne energy source when said ignition key is inserted into a position said ignition lock; and

said means for protecting against incorrect operation comprises a control unit arranged on said ignition key for detecting presence of external energy received by said energy receiver, and for disabling said communication component with respect to transmission of enabling data, in response thereto.

8. Communication arrangement according to claim 1 further comprising an ignition key-ignition lock communication channel for transmitting data to said vehicle when said ignition key is inserted into a position said ignition lock, wherein:

said means for protecting against incorrect operation comprises a control unit arranged on said ignition key for detecting a data transmission on said ignition key-ignition lock communication channel and for disabling said communication component with respect to transmission of enabling data, in response thereto.

9. Communication arrangement according to claim 2 further comprising an ignition key-ignition lock communication channel for transmitting data to said vehicle when said ignition key is inserted into a position said ignition lock, wherein:

said means for protecting against incorrect operation comprises a control unit arranged on said ignition key for detecting a data transmission on said ignition key-ignition lock communication channel, and for disabling said communication component with respect to transmission of enabling data, in response thereto.

10. Communication arrangement according to claim 8, wherein said ignition key-ignition lock communication channel is a wireless communication channel.