Testing device and method for measuring gas injection amount of natural gas engine

A test device, a technology of gas injection valve, applied in the direction of fuel injection device, engine test, measurement device, etc., can solve the problems of low precision and inconvenience, and achieve the effect of improving measurement accuracy and reducing measurement error

Inactive Publication Date: 2018-07-24
HARBIN ENG UNIV
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Problems solved by technology

[0007] The weighing method is only suitable for the engine bench test, the accuracy is low, and it is not convenient to control the error

Method used

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  • Testing device and method for measuring gas injection amount of natural gas engine

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] combine figure 1 , the invention discloses a test device for measuring the gas injection quantity of a natural gas engine, comprising a gas cylinder 1, a voltage stabilizing module, a control module, a measuring module and an information processing module; the stabilizing module includes a pressure reducing valve 2, a first pipeline 3, The first gas valve 4 and the pressure-stabilizing air chamber 5; the control module includes the gas injection valve 6, the injection valve seat 7, the nozzle pipe 8 and the injection valve driver 15; the measurement module includes a constant volume measurement module and a mass flow measurement module, and the constant volume The measurement module includes a constant volume gas chamber 9, a pressure sensor 10, a temperature sensor 11, and a second air valve 12; the mass flow module includes a second pipeline 13 and a mass flow...

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Abstract

The invention discloses a testing device and method for measuring the gas injection amount of a natural gas engine, and belongs to the technical field of engines. The testing device comprises a gas bottle, a pressure stabilization module, a control module, a measurement module and an information processing module. Gas is output from the gas bottle, is subjected to pressure stabilization through the pressure stabilization module, then is input to a gas injection valve in the control module, an injection valve driver in the control module carries out control adjustment on the injection cycle andthe gas injection pulse width of the gas injection valve, and then the gas enters into the measurement module; the measurement module comprises a constant volume measurement module and a mass flow rate measurement module; a second gas valve arranged between the constant volume measurement module and the mass flow rate measurement module and controls the gas to circulate in the constant volume measurement module and the mass flow rate measurement module, so that the effect of measuring the gas injection amount by using two processes is achieved; and the information processing module is used for collecting and processing signals. The effect of measuring the gas injection amount of the natural gas engine by using two measuring processes in one system is achieved, and two measurement resultscan be compared, so that the measurement accuracy is improved and the measurement error is reduced.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a test device and method for measuring gas injection quantity of a natural gas engine. Background technique [0002] With the shortage of energy and the deterioration of the environment, it is urgent to develop and use energy-saving and clean fuels. Among many fuels, natural gas is rich in resources and friendly to emissions, and has recently been highly valued and applied. Natural gas is a gaseous fossil fuel consisting of different types of gases, the main component of which is methane. Compared with traditional petroleum-based fuels such as diesel and gasoline, natural gas has a higher calorific value and a lower fuel-to-air equivalent ratio. After the combustion of natural gas, the emission of carbon oxides and nitrogen oxides is less, the generated soot is lower, and no harmful substances such as lead and benzene will be produced. Therefore, as an ideal fuel f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
Inventor 董全邵阳宋恩哲姚崇范立云杨立平孙军
Owner HARBIN ENG UNIV
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