Ventilating valve and automobile fuel tank with same
The utility model provides a ventilating valve and an automobile fuel tank with the same. The ventilating valve comprises a normally closed exhaust valve and a normally closed air inlet valve which are connected in parallel. When pressure of a first side of the ventilating valve is larger than that...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model provides a ventilating valve and an automobile fuel tank with the same. The ventilating valve comprises a normally closed exhaust valve and a normally closed air inlet valve which are connected in parallel. When pressure of a first side of the ventilating valve is larger than that of a second side of the ventilating valve, and the pressure difference absolute value of the pressure of the first side and the pressure of the second side exceeds a first threshold value, the air inlet valve is opened. When the pressure of the first side of the ventilating valve is smaller than that of the second side of the ventilating valve, and the pressure difference absolute value of the pressure of the first side and the pressure of the second side exceeds a second threshold value, the exhaust valve is opened. The two-channel type ventilating valve realizes that the exhaust valve exhausts air outwards from the inside of a fuel tank and the air inlet valve charges air inwards from the outside of the fuel tank |
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