| 摘要 |
In order, in a diagnostic unit (70) for leak testing of a tank system (10) of an internal combustion engine, to allow minimization of the energy consumption during a diagnostics test and simultaneously prevent the emission of fuel gases, a sleep/wake-up mechanism (270, 300, 350) is described, in which the diagnostic unit (70) enters a sleep mode for a selected time interval after the internal combustion engine is turned off, the diagnostic unit (70) enters a wake-up mode at the end of the first time interval and at least acquires the measurement data necessary for the diagnostics test in the wake-up mode; the diagnostic unit (70) then enters the sleep mode again during the diagnostics period, and the diagnostic unit (70) is switched off at the end of the diagnostics period.
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