Novel vehicle-mounted natural gas supply system and stable gas supply method thereof

A technology of gas supply system and natural gas, which is applied in the direction of charging system, oil supply device, combustion engine, etc., can solve the problems of waste of resources and the inability of economical valves to reduce the pressure in the bottle, so as to save energy, save resources, reduce The effect of energy waste

Active Publication Date: 2014-10-08
成都市珑熙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if there is no gas supply at this time, just when the engine stops using gas, the economic valve cannot reduce the pressure in the bottle. At thi

Method used

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  • Novel vehicle-mounted natural gas supply system and stable gas supply method thereof
  • Novel vehicle-mounted natural gas supply system and stable gas supply method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1:

[0031] like figure 2As shown, a new type of vehicle-mounted natural gas supply system includes an LNG storage tank 1, a vaporizer 6, a liquid outlet pipe 3 connected between the LNG storage tank 1 and the vaporizer 6, and is used for extracting from the LNG storage tank 1. The LNG pump 5 for liquefied natural gas and the pneumatic driving device 7 for driving the LNG pump 5 to work; the LNG pump 5 is arranged on the liquid outlet pipe 3; the pneumatic driving device 7 is arranged on the pipeline downstream of the vaporizer 6, The gas pressure of the natural gas in the pipeline is driven, and is connected to the LNG pump 5 through the driving pipeline. In this embodiment, the aforementioned pneumatic driving device 7 adopts an air motor, such as but not limited to a vane air motor, a piston air motor or a membrane air motor.

[0032] The working principle in this embodiment is:

[0033] In this embodiment, the self-pressurization system of the existing v...

Example Embodiment

[0035] Example 2:

[0036] On the basis of Embodiment 1, a novel vehicle-mounted natural gas supply system in this embodiment further includes an overflow circuit arranged at both ends of the LNG pump 5 in parallel, and an overflow valve 4 is arranged on the overflow circuit.

[0037] In this embodiment, an overflow circuit is set between the vaporizer 6 and the LNG gas storage tank 1 to further adjust the pressure balance. When the pressure in the vaporizer 6 is higher than the set value, the LNG pump 5 will stop working, the overflow valve 4 will be opened, and part of the natural gas that has been vaporized in the vaporizer 6 will return to the storage tank through the overflow valve 4 and the liquid outlet pipe 3. In the liquid phase space in the gas tank 1, when the pressure in the vaporizer 6 is reduced and balanced, the overflow valve 4 is closed, and the LNG pump 5 continues to work, so that the self-balancing effect of the system is better.

Example Embodiment

[0038] Example 3:

[0039] On the basis of Embodiment 2, in this embodiment, a pressure reducing and pressure regulating valve 8 and a buffer tank 9 are sequentially connected downstream of the carburetor 6 , a fuel cut-off valve 2 is also provided on the liquid outlet pipe 3 , and the downstream of the buffer tank 9 is connected to A pressure gauge 10 is also provided on the pipeline on the engine. The natural gas vaporized by the vaporizer 6 passes through the pneumatic drive device 7 and then enters the pressure reducing and pressure regulating valve 8 for pressure reduction, and finally is supplied to the engine through the buffer tank 9 for use. The air pressure driving device 7 may be further provided with a gas flow measuring device (eg, a flow meter) to monitor the gas supply situation in real time and detect the gas usage amount in real time.

[0040] The LNG pump 5 and the overflow valve 4 are located between the fuel cut-off valve 2 and the carburetor 6 . The pneu...

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Abstract

The invention discloses a novel vehicle-mounted natural gas supply system and a stable gas supply method of the novel vehicle-mounted natural gas supply system. The novel vehicle-mounted natural gas supply system comprises an LNG storage tank, a gasification device, a liquid outlet pipe connected between the LNG storage tank and the gasification device, an LNG pump used for extracting liquefied natural gas from the LNG storage tank and a gas pressure driven device driving the LNG pump to work. The LNG pump is arranged on the liquid outlet pipe. The gas pressure driven device is arranged on a pipeline on the downstream of the gasification device and driven through gas pressure of natural gas flowing through the pipeline and connected with the LNG pump through a driving pipeline. The gas pressure driven device of the system is driven through gas pressure of the gasified natural gas in the gasification device to work and drive the LNG pump to extract the liquefied natural gas from the LNG tank, the natural gas flows through the liquid outlet pipe to the gasification device, and therefore the passive circulatory system is formed. According to the system, gas fuel can be stably supplied to an engine, a self-pressurization system is omitted, evacuation loss of natural gas is reduced, and resource waste is avoided.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted natural gas supply, in particular to a novel vehicle-mounted natural gas supply system and a stable gas supply method thereof. Background technique [0002] At present, the vehicle-mounted LNG (Liquefied Natural Gas, liquefied natural gas) gas supply system consists of the following parts: LNG storage tank, fuel cut-off valve, carburetor, pressure reducing and regulating valve, buffer tank, etc. Since this gas supply system needs to match the filling pressure in the steel cylinder with the working requirements of the engine, it is necessary to control the saturation pressure of the filling station to reach a certain required value. This method requires the gas filling station to adjust the temperature of the stored LNG to increase the saturated vapor pressure of the LNG. This will not be conducive to the storage of LNG, and increase the loss of gas station emptying, so now a self-pressuri...

Claims

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Application Information

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IPC IPC(8): F02M21/02F02M21/06
CPCY02T10/30
Inventor 肖仁旺刘树文何才卢在江
Owner 成都市珑熙科技有限公司
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