14-07-2023 дата публикации
Номер: CN116428084A
Принадлежит:
The invention discloses a fuel evaporation system leakage false alarm prevention diagnosis control method and system, and belongs to the technical field of automobiles. The system comprises a diagnosis enabling judgment module, an engine desorption flow diagnosis module, a carbon tank and desorption pipeline leakage diagnosis module, an oil gas evaporation compensation module, a coarse leakage diagnosis module, a correction judgment module, a diagnosis completion module and an exit diagnosis module. By introducing a large number of diagnosis enabling conditions such as altitude, fuel oil liquid level, temperature, gradient, vehicle speed and the like, the diagnosis effectiveness is improved, and the diagnosis frequency is reduced. Through a series of measures such as desorption flow diagnosis, oil gas evaporation compensation and vacuum attenuation gradient judgment, the leakage diagnosis precision of the fuel evaporation system is greatly improved, and the false alarm probability is greatly ...
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