Toppling valve installed on vehicle fuel tank snorkel
A technology for vent pipes and fuel tanks, applied in the field of mechanical valves, which can solve problems such as unreliable sealing, plugs that cannot close the valve ports, and affecting the effective service life of activated carbon in the carbon tank, etc., to achieve reasonable matching structure and safe cut-off sealing Effect
Inactive Publication Date: 2009-08-19
CHONGQING LONCIN MOTOR
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AI Technical Summary
Problems solved by technology
Since the valve port of the upper cover is conical and the plug on the inner cover is spherical, the contact between the plug and the valve port is a line contact at the time of closing, and the seal is not reliable; in addition, the upper cover is connected with the fuel tank, and the lower The cover is connected to the carbon tank. If the liquid level in the fuel tank is higher than the dump valve (such as on a riding motorcycle), when the fuel overflows, the pressure generated by the fuel is large enough to overcome the force of the steel ball on the inner cover, and it is easy to If the plug cannot close the valve port, the fuel can easily enter the carbon tank through the dump valve, which will affect the effective service life of the activated carbon in the carbon tank
Method used
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[0018] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0019] Such as figure 1 As shown, the housing of the dumping valve is formed by relatively welding the upper cover 1 and the lower cover 2, the upper cover 1 is integrally connected with the first air pipe joint 3, and the lower cover 2 is integrally connected with the second air pipe The joint 4, the inner cavity of the housing is the valve chamber 5, the valve chamber 5 communicates with the first vent pipe joint 3 and the second vent pipe joint 4, and the valve chamber 5 is provided with a valve plug 6, a steel ball 7 and a valve seat 8. A valve port 9 is provided at the connection between the valve cavity 5 and the first vent pipe joint 3, a plug 10 is provided on one side of the valve plug 6 to match the valve port 9, and the steel ball 7 is located on the other side of the valve plug 6 and When the inverted cone-shaped valve seat 8 cooperates with the ...
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The invention provides a dumping valve installed on an air pipe of a vehicle fuel tank, comprising a case and a first air pipe joint and a second air pipe joint which are communicated with a valve chest in the case; wherein, the valve chest is internally provided with a valve plug, a steel ball and a valve seat; a valve port is arranged at the place where the valve chest is communicated with the first air pipe joint; one side of the valve plug is provided with an end cap matching the valve port; the steel ball is positioned between the other side of the valve plug and an inverted cone valve seat; when the end cap matches the valve port, continuous surface contact is between the end cap and the valve port in circumferential direction. The matching structure between the end cap and the valve port is more reasonable and the sealing is safer and more reliable, thus effectively avoiding the fuel in the fuel tank from overflowing and entering a carbon tank when the vehicle body is dumped.
Description
technical field [0001] The invention relates to a mechanical valve, especially a dump valve installed on a vent pipe of a fuel tank of a vehicle. Background technique [0002] On the vehicle, in order to prevent the fuel vapor in the fuel tank from being directly discharged into the atmosphere and pollute the environment, it is necessary to lead a vent pipe from the fuel tank to connect with the carbon canister. The fuel vapor is discharged into the engine intake pipe, where it mixes with air and enters the combustion chamber of the engine for combustion. At the same time, when the amount of fuel in the fuel tank is reduced to a certain extent, air enters the fuel tank through the carbon tank to compensate the pressure in the fuel tank. [0003] When the fuel tank is dumped along with the vehicle body, the fuel in the fuel tank may overflow and enter the vent pipe. Install dump valve. When the tilt angle of the car body exceeds the set value, the dump valve will close the...
Claims
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Login to View More IPC IPC(8): F02M25/08
Inventor 苟孝贵
Owner CHONGQING LONCIN MOTOR