Constant volume bomb combustion gas mixing system and control method

Abstract

The present invention provides a constant volume bomb combustion gas mixing system and a control method. The system comprises gas cylinders of various types of gases, flow controllers, a gas mixer, a vacuum pump, a constant volume bomb, connecting pipes, a control part and a control circuit, wherein the connecting pipes are arranged between the gas cylinders, the flow controllers, the gas mixer, the vacuum pump and the constant volume bomb; the control circuit includes a vacuum pump driving circuit, a flow controller driving circuit, a signal acquisition circuit and a spark plug driving circuit; and the vacuum pump, the flow controllers, a pressure sensor which is arranged on the gas mixer, a micro pressure sensor, a pressure sensor which is arranged on the constant volume bomb, and a spark plug are all connected with the control part through the control circuit so as to be controlled, wherein the micro pressure sensor is arranged on the gas mixer, and the spark plug is arranged on the constant volume bomb. With the control method of the system adopted, precise molar volume ratio control on pre-combustion mixed gases can be realized, complete and controllable pre-combustion can be realized, a reliable environment can be provided for the search of the spray combustion characteristics of a diesel, experimental risk can be deceased, and high practicality can be realized.

Description

technical field [0001] The invention relates to a gas mixing system and a control method, in particular to a constant volume bomb gas mixing system and a control method. Background technique [0002] The constant volume bomb is an engine combustion simulation experimental device, which can efficiently and accurately simulate the temperature and pressure of the engine when it is working, and can quantitatively study the influence of various parameters on the spray characteristics of the engine injector. Advanced constant volume bombs should withstand high temperature and high pressure while maintaining a simple structure, and can meet the test requirements of continuous measurement, and at the same time be able to meet the characteristics of combustion and the visual observation of the combustion process. When using constant volume bombs to study the spray combustion characteristics of diesel engines, it is necessary to fill a certain proportion of combustible gas, oxygen, ni...

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Problems solved by technology

[0004] Chinese patent CN105115733A proposes a constant volume combustion system and control method, but it does not involve gas mixing, there is no gas mixing device, and the control method is also different from the present invention

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