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Securely calculating and storing vehicle odometer data

  • US 7,610,128 B2
  • Filed: 05/23/2007
  • Issued: 10/27/2009
  • Est. Priority Date: 05/23/2007
  • Status: Active Grant
First Claim
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1. In a vehicle that includes a current engine, a first electronic control unit associated with the current engine, and a second electronic control unit that is communicatively connected to the first electronic control unit, a method of calculating an official vehicle odometer value that represents a total distance traveled by the vehicle, the method comprising:

  • maintaining a current engine offset in a memory of the second electronic control unit, wherein the current engine offset represents the total distance traveled by the vehicle calculated as a sum of one or more previous engine offsets and a difference between an official engine odometer value of the one or more previous engines and an engine odometer value of the current engine;

    receiving the engine odometer value from the first electronic control unit, wherein the engine odometer value represents the total distance traveled by the vehicle using the current engine; and

    calculating an official vehicle odometer value to determine if the engine odometer value is tampered, wherein the official vehicle odometer value is based on a summation of the engine odometer value received from the first electronic control unit and the current engine offset maintained in the memory of the second electronic control unit.

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