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Secure system for controlling the unlocking of at least one openable panel of a motor vehicle

  • US 6,424,254 B1
  • Filed: 05/11/2000
  • Issued: 07/23/2002
  • Est. Priority Date: 05/11/1999
  • Status: Expired due to Fees
First Claim
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1. A system for controlling means for locking/unlocking at least one motor vehicle openable panel comprising transmission/reception means which are intended for transmitting, from the vehicle, a radio-frequency interrogation signal, which transmission/reception means are intended to be carried by a user and which, on receipt of the interrogation signal, are intended for transmitting a radio-frequency identification signal so as to actuate the unlocking of the openable panel, which system comprises detection means which are linked to the transmission/reception means on the vehicle and which are able to detect, on an identification signal received on the transmission/reception means, a modification of a parameter of the transmission, between the transmission/reception means of the vehicle and of the user, which is due to the interposition, between the vehicle and the user, of intermediate transmission/reception means.

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