Shut-off device and fueling apparatus for fuel tank

A technology for fuel tanks and fuel passages, applied in hydraulic/pneumatic transmission signal devices, substructures, etc., can solve problems such as positive and negative pressure valves that cannot be confirmed from the outside, and achieve the effect of preventing damage
CN1746045AInactive Publication Date: 2006-03-15TOYODA GOSEI CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TOYODA GOSEI CO LTD
Publication Date
2006-03-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A fuel cap easily realizes a function to warn the user that the pressure regulating valve is activated as backup means for the fuel tank pressure adjustment mechanism. The fuel cap includes a negative pressure valve that regulates the fuel tank pressure. An alarm mechanism is disposed upstream from the negative pressure valve. The alarm mechanism issues a warning that the negative pressure valve of the pressure regulating valve is activated as a backup for the fuel tank pressure adjustment mechanism by emitting sound via a whistle mechanism when air flow takes place due to the opening of the negative pressure valve.
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Description

technical field

[0001] The present invention relates to a fuel supply device having a closing body of a pressure regulating valve as an auxiliary device for preventing damage to a fuel tank and a fuel tank. Background technique

[0002] Currently, the fuel tank of an automobile is provided with a pressure adjustment mechanism for adjusting its internal pressure to prevent the fuel tank from being deformed or crushed. On the other hand, it is known that positive and negative pressure valves (pressure adjustment valves) are incorporated in fuel caps that open and close the container opening of fuel tanks (for example, Patent Document 1). The positive and negative pressure valve of the fuel cap is provided as an auxiliary device, which is opened when the pressure adjustment mechanism does not work normally, so as to prevent the internal pressure of the fuel tank from decreasing, so as to prevent damage to the fuel tank.

[0003] However, the operation of the positive and negat...

Claims

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