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Fuel tank isolation valve and using method thereof

A technology for isolating valves and fuel tanks, which is applied to fuel injection devices, fuel injection control, and adding non-fuel substances to fuel, etc. It can solve the problems of increasing the heat generation of solenoid valves and reducing the service life of isolation valves, so as to improve the connection tightness , Reduce heat, enhance the effect of use

Pending Publication Date: 2021-01-26
德安福(天津)汽车技术有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that when the engine is used to drive the forced isolation valve to continue to open, the solenoid valve in the isolation valve needs to be continuously energized, which has the disadvantage of increasing the heat generation of the solenoid valve and reducing the service life of the isolation valve.

Method used

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  • Fuel tank isolation valve and using method thereof
  • Fuel tank isolation valve and using method thereof
  • Fuel tank isolation valve and using method thereof

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Embodiment Construction

[0035] The following is attached Figure 1-5 The application is described in further detail.

[0036] The embodiment of the present application discloses a fuel tank isolation valve. combine figure 1 and figure 2 , a fuel tank isolation valve, comprising an isolation valve body 1, an oil pressure control module 2 is integrally fixed on the isolation valve body 1, and the oil pressure control module 2 controls the switch of the isolation valve body 1 by controlling the pressure of 21 oil pipes, when the oil pressure After rising to the set threshold, the oil pressure control module 2 will open the isolation valve. When the oil pump stops running and the oil pressure drops below the set threshold, the oil pressure control module 2 will close the isolation valve body 1, and the isolation valve body 1 is not required. The solenoid valve remains energized for a long time, reduces the frequency of use of the solenoid valve and greatly reduces the use time, and achieves the effec...

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Abstract

The invention relates to a fuel tank isolation valve. The fuel tank isolation valve comprises an isolation valve body, wherein an oil pressure control module is integrally and fixedly connected to theisolation valve body and controls opening and closing of the isolation valve body through oil pressure, after the oil pressure rises to a set threshold value, the oil pressure control module opens the isolation valve, when an oil pump stops running, the oil pressure drops to a value below the set threshold value, the oil pressure control module closes the isolation valve body, an electromagneticvalve in the isolation valve body does not need to be kept in a power-on state for a long time, the use frequency of the electromagnetic valve is reduced, the use time is greatly shortened, and the effect of prolonging the service life of the isolation valve body is achieved.

Description

technical field [0001] The present application relates to the field of fuel system design and manufacture, and in particular relates to a fuel tank isolation valve and its usage method. Background technique [0002] In a typical fuel vapor control module, vapors exhausted from the fuel system are sent to a purge canister containing activated carbon that adsorbs fuel vapors, and the fuel tank can use an isolation valve to open and close the vapor path between the fuel tank and the purge canister. [0003] The existing fuel tank isolation valve is generally composed of a solenoid valve, an overpressure safety valve and a vacuum safety valve. The overpressure safety valve is responsible for releasing the pressure when the internal pressure of the fuel tank exceeds the safe pressure value, and the vacuum safety valve is responsible for releasing the pressure when the internal pressure of the fuel tank is lower than the safe pressure value. When the pressure value is reached, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/08F02D41/00F02D41/04B60K15/035
CPCF02M25/08F02M25/0836F02M25/089F02D41/004F02D41/04B60K15/035F02M2025/0845B60K2015/03576B60K2015/03571
Inventor 邢天龙卢晨曦董振杨张红明田文
Owner 德安福(天津)汽车技术有限公司
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