The invention discloses a venturi tube and an automobile fuel steam desorption system. The venturi tube comprises a venturi tube body, an air inlet channel, an air outlet channel and a desorption channel are arranged in the venturi tube body, and an air inlet, an air outlet and a desorption opening are formed in the venturi tube body through the air inlet channel, the air outlet channel and the desorption channel correspondingly; and the venturi tube is further provided with a bypass channel, the bypass channel forms a bypass port in the venturi tube body, and the desorption channel is in communication with the interior of the bypass channel. When the venturi tube is in a working state, the bypass port is blocked, and the venturi tube can work normally; and once the venturi tube is accidentally disengaged, the bypass port is opened, the desorption port is in communication with the atmosphere, the vacuum degree of the desorption end is reduced, a pressure sensor in the desorption system can sense the pressure change, and the system gives an alarm.
本发明公开了一种文氏管及汽车燃油蒸汽脱附系统,所述文氏管包括文氏管本体,所述文氏管本体内设置有进气通道、出气通道、和脱附通道,所述进气通道、出气通道、脱附通道分别在文氏管本体上形成进气口、出气口、和脱附口;所述文氏管还具有旁通通道,所述旁通通道在文氏管本体上形成旁通口,所述脱附通道和旁通通道内部连通。本申请的文氏管在工作状态下,旁通口封堵,文氏管可以正常工作;一旦文氏管意外脱开,旁通口打开,使脱附口与大气相通,脱附端真空度降低,有利于脱附系统中的压力传感器感应到压力变化,系统报警。
Venturi tube and automobile fuel steam desorption system
文氏管及汽车燃油蒸汽脱附系统
2021-07-23
Patent
Elektronische Ressource
Chinesisch
IPC: | F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / F04F PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED , Pumpen von Arbeitsfluiden durch unmittelbare Berührung mit einem anderen Arbeitsfluid oder durch Ausnutzung der Trägheit des zu pumpenden Arbeitsfluids |
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