Patent ID: 9353707
Filing Date: 2016-05-31
CPC Classification: F02B,F02M

Claim Text:
1. An evaporated fuel treating device for an internal combustion engine having an intake pipe, the evaporated fuel treating device comprising: a fuel evaporation system including a fuel tank, an adsorber, and a purge passage, the fuel tank that stores fuel for the internal combustion engine, the adsorber that adsorbs evaporated fuel generated in the fuel tank, the purge passage that directs a flow of the evaporated fuel, from the adsorber, into the intake pipe of the internal combustion engine; a purge valve that adjusts a flow rate of the evaporated fuel flowing in the purge passage; a non-return valve that prevents a reverse flow of gas in the purge passage from inside of the intake pipe towards the adsorber; a seal valve mechanism that seals the fuel evaporation system; and an electronic control unit configured to open and close the purge valve after causing the seal valve mechanism to seal the fuel evaporation system, when the internal combustion engine is stopped, and the electronic control unit configured to detect an open failure state of the non-return valve based on a pressure difference inside the fuel evaporation system when the purge valve is opened and closed.