Equipment for calibrating flow rate characteristic of fuel gas nozzle

Abstract

The invention relates to equipment for calibrating the flow rate characteristic of a fuel gas nozzle, which comprises a fuel gas source 1 for supplying a fuel gas, a depressurizing device 2 for depressurizing the fuel gas from the fuel gas source 1, a pressure stabilizing device 3 for stabilizing the pressure of the fuel gas from the depressurizing device, a gas collecting device 10 for collecting and measuring the volume of fuel gas injected by a nozzle 8 to be calibrated, pressure testing devices 4a and 4b for testing pressures before and after the nozzle and a control system, wherein the control system comprises a flow rate calibrating device for calibrating the variation characteristic of the flow rate of the nozzle with ejection duration and ejection pressure; and the control system is used for determining the characteristics of the driving current of the nozzle and determining the driving current suitable for the fuel gas nozzle according to the response characteristic of an electromagnetic valve of the nozzle. The equipment can calibrate the flow rate characteristics of different fuel gas nozzles, determine the optimal working areas of the fuel gas nozzles, optimize the driving characteristics of the fuel gas nozzles and provide an accurate basis for the model selection and application of the fuel gas nozzles.

Description

technical field [0001] The invention relates to a device for calibrating the flow characteristic of a gas nozzle, especially a device for calibrating the flow characteristic of a hydrogen nozzle. Background technique [0002] With the gradual depletion of petroleum energy, the current energy structure is facing a fundamental change. Since the current energy consumption of automobiles accounts for a quarter of the world's total energy consumption, the number of automobiles will continue to increase in the future, which makes people pay more and more attention to alternative fuels; CO, HC and CO are produced during combustion 2 , causing great harm to the human living environment, which further promotes the development and utilization of alternative fuels. Gas fuel such as compressed natural gas CNG, liquefied natural gas LND, liquefied petroleum gas LPG, hydrogen H 2 Because of its physical and chemical properties, it can effectively improve the insurmountable weaknesses o...

AI Technical Summary

Problems solved by technology

[0004] According to the gas fuel nozzle flow characteristics, when less than a certain injection duration t 0 When the nozzle flow rate is unstable (such as figure 1 Shown), resulting in the inability to accurately control the corresponding gas flow rate under the shorter injection duration during its use, resulting in unstable system operation

However, at present, there are few and imperfect devices for measuring the flow rate of gas nozzles, and it is impossible to accurately measure the gas flow rate corresponding to the short injection duration of the nozzle, which limits the flow utilization range of gas nozzles and causes a certain degree of waste of resources.

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