Equipment for calibrating flow rate characteristic of fuel gas nozzle

A technology of flow characteristics and gas nozzles, which is used in mechanical equipment, combustion engines, internal combustion piston engines, etc., and can solve problems such as imperfection, inability to accurately control gas flow, and inability to accurately measure nozzle gas flow.

Inactive Publication Date: 2010-05-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Equipment for calibrating flow rate characteristic of fuel gas nozzle
  • Equipment for calibrating flow rate characteristic of fuel gas nozzle
  • Equipment for calibrating flow rate characteristic of fuel gas nozzle

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Embodiment Construction

[0021] attached Image 6 , 7 shows a test system and a functional block diagram for calibrating the flow characteristics of a hydrogen nozzle according to an embodiment of the present invention, the system includes a hydrogen source 1 for storing hydrogen, and the high-pressure hydrogen from the hydrogen source 1 is reduced by a pressure reducing valve 2 After being pressurized, it enters the hydrogen plenum 3, and the low-pressure hydrogen flowing out from the hydrogen plenum passes through the hydrogen flow sensor and finally reaches the front end of the hydrogen nozzle 8. The pressure detection and data acquisition device uses the pressure sensor 4a to display the hydrogen pressure value of the stabilizing chamber on the oscilloscope. During the calibration process, the computer 13 compares the hydrogen injection target pressure value with the detection value in real time, and outputs the correction command signal in time to adjust the hydrogen pressure reducing valve. Clos...

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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...

Claims

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Application Information

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IPC IPC(8): F02M21/02
CPCY02T10/32Y02T10/30
Inventor 孙柏刚刘福水张冬生
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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