×

Vehicle diagnostic data storing system

  • US 5,964,813 A
  • Filed: 10/30/1997
  • Issued: 10/12/1999
  • Est. Priority Date: 11/07/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A fault information storage system for storing fault information on a vehicle control system, comprising:

  • a first storing unit of a battery backup type for storing fault information if a fault occurs, and updating the fault information during a vehicle operation;

    a second storing unit of a nonvolatile type for storing a most recent version of the fault information in the first storing unit;

    a control unit for detecting a fault in the vehicle control system, for updating the fault information each time a fault is detected during the vehicle operation from a turn-on of an ignition key switch of the vehicle to a turn-off of the ignition key switch, and for performing a writing operation of writing the most recent version into the second storing unit if the fault information is updated during the vehicle operation, the control unit including a writing unit for performing the writing operation to write the information updated in a previous vehicle operation when the ignition switch is turned on,wherein the writing unit performs the writing operation again if the ignition switch is turned off during the writing operation.

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