×

Method and device for energy-saving leak testing of a fuel tank system, in particular of a motor vehicle

  • US 7,043,375 B2
  • Filed: 07/10/2001
  • Issued: 05/09/2006
  • Est. Priority Date: 08/03/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of operating a diagnostic unit for leak testing of a tank system of an internal combustion engine, comprising:

  • acquiring measurement data necessary for leak testing during a diagnostics period after the internal combustion engine is turned off;

    setting the diagnostic unit to a sleep mode for a preset first time interval after the internal combustion engine is turned off;

    setting the diagnostic unit to a wake-up mode after the first time interval elapses, the diagnostic unit at least acquiring the measurement data in the wake-up mode;

    setting the diagnostic unit to the sleep mode again during the diagnostics period; and

    switching off the diagnostic unit at an end of the diagnostics period.

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