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Vehicle mass analysis system standard device for simulating exhaust emission

A transient working condition and tail gas emission technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of inaccurate and comprehensive evaluation of the overall accuracy of the VMAS system, and the measurement error of detection data is blank. Achieve the effect of accurately testing dynamic response characteristics, good performance and ensuring accuracy

Inactive Publication Date: 2014-03-26
ZHEJIANG MEASUREMENT SCI RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] To sum up, at present, the individual performance of each component of the VMAS system cannot be accurately and comprehensively evaluated the overall accuracy of the VMAS system, and the research on the measurement error of the detection data in units of g / km has been blank.

Method used

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  • Vehicle mass analysis system standard device for simulating exhaust emission
  • Vehicle mass analysis system standard device for simulating exhaust emission
  • Vehicle mass analysis system standard device for simulating exhaust emission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, the simple transient operating condition emission system of a gasoline vehicle is verified, and a simple transient operating condition emission detection standard device for a gasoline vehicle simulating exhaust emissions (flowmeter temperature: 30.9°C, flowmeter pressure: 100.2 Kpa, flow meter flow rate: 119.7L / s, ambient oxygen concentration: 20.8%, diluted oxygen 10.1%, PEF: 0.5), connect the mixed standard gas outlet of the calibration gas control unit with the simple transient emission monitoring system of gasoline vehicles The air inlet of the ML-100 five-gas analyzer in the ML-100 gas analyzer is connected, and the standard concentration diluted oxygen outlet of the standard gas control unit is connected with the diluted oxygen inlet of the ML-100 flow analyzer in the simple transient working condition emission detection system of gasoline vehicles. Connected to the port, through the control of the operation console, the mixed standard gas 2 (CO: ...

Embodiment 2

[0031]In this example, the simple transient operating condition emission system of gasoline vehicles is verified, and a simple transient operating condition emission detection standard device for gasoline vehicles (flowmeter temperature: 36.7°C, flowmeter pressure: 97.0°C) is installed in a manufacturer B in a certain place to simulate exhaust emissions. Kpa, flow meter flow rate: 108L / s, ambient oxygen concentration: 20.8%, diluted oxygen 10.2%, PEF: 0.546), connect the mixed standard gas outlet of the calibration gas control unit to the simple transient state emission monitoring system of gasoline vehicles The air inlet of the five-gas analyzer is connected, the standard concentration diluted oxygen outlet of the standard gas control unit is connected with the diluted oxygen inlet of the flow analyzer in the simple transient working condition emission detection system of gasoline vehicles, through the operation console control, within 195 seconds, the mixed standard gas 2 (CO...

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Abstract

The invention relates to a vehicle mass analysis system standard device for simulating exhaust emission. The standard device composes an operating console consisting of an upper computer and a singlechip, a gas source and a standard gas control unit, wherein standard gas output by the gas source enters the standard gas control unit; a mixed standard gas outlet of the standard gas control unit is connected with a gas inlet of a five-gas analyzer in a vehicle mass analysis system; a standard concentration diluting oxygen outlet of the standard gas control unit is connected with a diluting oxygen inlet of a flow analyzer in the vehicle mass analysis system; and the standard gas control unit is controlled by the operating console. According to the standard device, mixed standard gas and standard concentration diluting oxygen in an accurate proportion is used as reference gas; and meanwhile, a high-accuracy proportional pressure adjusting valve is arranged in the standard gas control unit, so that the flow requirement of the standard gas can be accurately controlled, and the static response characteristic of a zirconium oxide sensor can be accurately tested.

Description

technical field [0001] The invention relates to a standard device, in particular to a simple transient working condition emission detection standard device for gasoline vehicles that simulates exhaust emissions. Background technique [0002] Using the gasoline vehicle simple transient emission detection system (referred to as VMAS system) to detect vehicle exhaust emissions is a relatively new exhaust emission detection method in the world. It can obtain the current hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO 2 ), nitric oxide (NO), oxygen (O 2 ) and diluted oxygen concentration and other data, and obtain the final emission quality through calculation and processing, so as to judge the compliance of automobile exhaust emission standards. The basic principle of using VMAS system to detect automobile exhaust emissions is: VMAS system consists of four parts, automobile chassis dynamometer, five-gas analyzer, flow analyzer, and main control computer system. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/409
Inventor 严瑾林峰叶振洲邵建文
Owner ZHEJIANG MEASUREMENT SCI RES INST
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