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Method for adjusting gas flow in analysis of automotive tail gas

A technology of automobile exhaust and gas flow, applied in the direction of analyzing materials, analyzing materials through optical means, measuring devices, etc., can solve the problems of high cost, complicated circuit, and affecting measurement accuracy, and achieve increased measurement accuracy, simple use, and high function Excellent effect

Inactive Publication Date: 2012-07-18
苏州工业园区广福汽保机电设备有限公司
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AI Technical Summary

Problems solved by technology

Since the exhaust pumps of automobile exhaust gas analyzers currently use built-in vibration pumping, the gas entering the analyzer is pulsating, and pulsating gas will affect the measurement accuracy.
Current automobile exhaust gas analyzers use special electronic circuits to smooth pulsating signals. This design is not only complicated in circuit, but also high in cost.

Method used

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  • Method for adjusting gas flow in analysis of automotive tail gas
  • Method for adjusting gas flow in analysis of automotive tail gas
  • Method for adjusting gas flow in analysis of automotive tail gas

Examples

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Embodiment Construction

[0014] To provide a method for adjusting the gas flow rate in automobile exhaust gas analysis, that is, to design the air resistance structure used in the automobile exhaust gas analyzer to adjust the flow rate, and to design the air resistance-air capacity structure similar to the principle of resistance-capacitance in the circuit. Has a good smoothing effect.

[0015] Such as figure 1 , figure 2 As shown, the air resistance structure used in the automobile exhaust gas analyzer mainly includes an air hose 1, a plastic pipe 2 and a self-tapping screw 3, and a plastic pipe 2 with a changeable outer diameter is inserted into the air hose 1, A conical self-tapping screw 3 is screwed into the plastic tube 2; wherein, the ratio of the outer diameter of the plastic tube 2 to the inner diameter of the air hose 1 is 1:1.05 to 1:1.15, and the specific material of the plastic tube is nylon 1010.

[0016] In specific applications, by adjusting the position where the self-tapping scre...

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Abstract

The invention provides a method for adjusting the gas flow in the analysis of automotive tail gas. A plastic pipe, the external diameter of which can be changed is inserted in a gas circuit hose; a conical self-tapping screw is inserted in the plastic pipe in a rotary manner; the position that the self-tapping screw is inserted into the plastic pipe in a rotary manner is adjusted, so as to changethe external diameter of the plastic pipe, furthermore change the clearance between the plastic pipe and the gas circuit soft pipe; the gas resistance is adopted to accurately change the flow of the gas outflowing from a gas chamber, thus ensuring that the vapor is condensed, and solving the problem of the vapor in optical measurement; the combination of the gas resistance and the gas capacitancesmoothes the pulsed gas and improves the measuring precision. The method has simple structure and is convenient to use, and can be widely popularized and applied in the industries.

Description

technical field [0001] The invention relates to a method for adjusting gas flow in automobile tail gas analysis, and belongs to the technical field of detection equipment. Background technique [0002] The automobile exhaust analyzer uses non-dispersive infrared method (NDIR) to detect HC, CO, CO in automobile exhaust. 2 , O 2 , NOX and other harmful gas concentration detection equipment. Since the exhaust pumps of automobile exhaust gas analyzers currently use built-in vibration pumping, the gas entering the analyzer is pulsating, and pulsating gas will affect the measurement accuracy. Current automobile exhaust gas analyzers all use special electronic circuits to smooth pulsating signals. This design is not only complex in circuit, but also high in cost. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for adjusting gas flow in automobile exhaust gas analysis. [0004] The pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24G01N21/35G01N21/3504
Inventor 周强
Owner 苏州工业园区广福汽保机电设备有限公司
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