A fuel tank protection valve and a fuel tank with the protection valve
A technology for protecting valves and fuel tanks, which is applied to liquid fuel feeders, packaging, and charging systems, and can solve problems such as poor oil vapor emission
Active Publication Date: 2016-12-14
BYD CO LTD
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Problems solved by technology
[0004] An object of the present invention is to overcome the disadvantages of the prior art that the fuel tank is not effective in controlling the discharge of oil vapor, and to provide a fuel tank protection valve that effectively controls the discharge of oil vapor. Another object of the present invention is to provide a valve with the The fuel tank of the fuel tank protection valve
Method used
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[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0024] Such as figure 1 As shown, a fuel tank protection valve provided by the present invention includes a valve body 1, a valve core 3 that is movably installed on the valve body 1 through an elastic member 2, and an oil and gas valve that can be closed or opened in cooperation with the valve core 3. The valve port 4 and the oil-gas passage 5 connected with the oil-gas valve port 4, the valve body 1 is divided into a first cavity 7 and a second cavity 8, the valve core 3 is located in the first cavity 7, and the oil-gas A second cavity 8 is formed between the valve po...
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The invention provides a fuel tank protecting valve which comprises a valve body, a valve core movably mounted on the valve body through elastic members, an oil-gas valve port matched with the valve core and capable of being closed or open, an oil-gas passage communicated with the oil-gas valve port. The oil-gas passage is communicated with an activated carbon tank, and the protecting valve is additionally mounted correspondingly to the oil-gas valve port to limit discharging of oil vapour in a fuel tank. The invention further provides the fuel tank. The fuel tank protecting valve is mounted on the fuel tank, so that when an engine desorbs the activated carbon tank and the interior of the fuel tank is in a negative-pressure state, an air-pressure adjusting valve port is opened, outside gas enters the fuel tank protecting valve through the oil-gas passage and then enters the fuel tank through the air-pressure adjusting valve port to perform air pressure compensation on the fuel tank, so that deformation and even breakage of the fuel tank due to overhigh negative pressure can be effectively prevented.
Description
technical field [0001] The invention relates to a fuel tank protection valve and a fuel tank with the protection valve. Background technique [0002] The application number "200720131287.7" in the Chinese invention patent application publication discloses a fuel tank dump valve. The upper and lower cavities are arranged in the valve body through the inner cover, and channels are respectively arranged in the upper and lower cavities. The inner cover A valve port connecting the upper and lower cavity passages is arranged on the upper part, and a valve core is arranged below the valve port, and the valve core is supported in the lower cavity by a large spring. A central passage connected to the upper and lower cavity passages is provided at the central axis of the valve core, a float is arranged below the central passage, a valve core cover is arranged below the float, and the valve core cover is fixedly connected to the valve core, A small spring is arranged between the valve...
Claims
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IPC IPC(8): B60K15/035F02M37/00
Inventor 庄新发
Owner BYD CO LTD