×

Access and start/drive authorization system

  • US 6,686,670 B1
  • Filed: 11/08/2001
  • Issued: 02/03/2004
  • Est. Priority Date: 10/17/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. An access and starting/driving-authorization system for a motor vehicle, comprising:

  • an engine control unit;

    a smart master-key system;

    a portable transponder; and

    a control unit included in the motor vehicle, and associated with the smart master-key system and the engine control unit, the control unit communicating with the transponder using sets of code information matched to each other in inquiry/response dialogs, the control unit enabling or blocking access to, starting, and driving of the motor vehicle in conjunction with the transponder;

    wherein whether the motor vehicle is enabled to be started and driven after a successful starting/driving-authorization inquiry/response dialog, using the transponder, depends upon a preceding, successful access-authorization inquiry/response dialog using the transponder.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×