Computer gas volume metering method and device for natural gas fuel cylinder of vehicle

A natural gas and computer technology, applied in the field of computer measurement method and device for gas storage capacity of natural gas vehicle gas cylinders, can solve the problems of lack of measurement means, difficulty in vehicle natural gas leakage, inability to display the gas storage capacity of vehicle gas cylinders, and single-vehicle gas consumption

Inactive Publication Date: 2005-02-23
上海市公用事业研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, environmental temperature changes have a significant impact on the pressure in the gas cylinder. The existing pressure gauges do not take into account the influence of temperature changes on the pressure in the gas cylinder, so they cannot display the real gas storage capacity in the vehicle gas cylinder and assess the gas consumption of a single vehicle. It is Difficult to Find Vehicle Gas Leakage in Time
Due to the lack of metering means, there is no metering device suitable for natural gas vehicles at home and abroad. It is impossible to know the real gas storage capacity and gas usage of the vehicle, which brings a lot of inconvenience to the users of natural gas vehicles. Measuring methods and devices are the top priority

Method used

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  • Computer gas volume metering method and device for natural gas fuel cylinder of vehicle
  • Computer gas volume metering method and device for natural gas fuel cylinder of vehicle
  • Computer gas volume metering method and device for natural gas fuel cylinder of vehicle

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] The basic principle of the present invention, a computer measurement method and device for the gas storage capacity of a gas cylinder of a natural gas vehicle, is to use the state equation of an ideal gas.

[0035] That is, when the mass is M, the molar mass is M mol When the ideal gas of is in equilibrium, the relationship between its P, V and T is:

[0036] PV = M M mol RT - - - ( 1 )

[0037] R—mole gas constant, in the international system of units R=8.31J / mol·K

[0038] P—gas pressure (Pa)

[0039] M—gas quality (Kg)

[0040] V—gas volume (m 3 )

[0041] However, for real gas, only when the density is not too high, the pressure is not too high (compared with atmospheric pressure), ...

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Abstract

A device consists of monoithic computer, temperature measuring unit on cylinder wall, pressure measuring unit on tube between pressured release valve and gas cylinder, man-machine component and a display. It is featured as connecting output end of the two units to input end of A/D conventer separately for transmitting digital value to monolithic computer.

Description

Technical field: [0001] The invention relates to a natural gas vehicle, in particular to a computer measurement method and device for the gas storage of a gas cylinder of a natural gas vehicle. Background technique: [0002] As modern society pays more and more attention to environmental protection, environmentally friendly vehicles that use natural gas as fuel, namely natural gas vehicles, are increasingly popular. Natural gas vehicles use natural gas as fuel and do not produce toxic and harmful exhaust gas when driving. Natural gas is stored in a gas cylinder as a compressed gas. During use, the pressure in the cylinder changes between 2-20 MPa. However, changes in ambient temperature have a very significant impact on the pressure in the cylinder. The existing pressure gauges do not take into account the impact of temperature changes on the pressure in the cylinder, so they cannot display the true gas storage in the vehicle cylinder and evaluate the gas consumption per vehicle....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F22/02
Inventor 孙芃
Owner 上海市公用事业研究所
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