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A vehicle exhaust emission measurement device and method

A technology of automobile exhaust and measuring devices, applied in measuring devices, air quality improvement, instruments, etc., can solve problems such as theoretical calculation errors and differences, and achieve the effect of avoiding calculation errors

Active Publication Date: 2016-10-05
交通运输部公路科学研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the dilution air is used to correct the measurement results of the diluted exhaust gas, due to the difference between the calculated dilution factor and the actual dilution factor, a theoretical calculation error occurs;

Method used

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  • A vehicle exhaust emission measurement device and method
  • A vehicle exhaust emission measurement device and method

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Embodiment 1

[0053] A vehicle exhaust emission measuring device, comprising a dilution air intake port 1, a dilution channel 2, an engine exhaust intake port 3 and a dilution exhaust discharge port 4;

[0054] The dilution air inlet port 1 is used to measure the quality of gas and particles in the input dilution air and measure the total flow rate of the input dilution air, and then send the dilution air into the dilution channel 2;

[0055] The dilution channel 2 is used to receive input dilution air and engine exhaust, and mix the dilution air with engine exhaust;

[0056] The engine exhaust intake port 3 is used to input engine exhaust to the dilution channel 2;

[0057] The diluted exhaust gas outlet 4 is used to measure the total flow rate of the diluted exhaust gas obtained by mixing the engine exhaust gas with the diluted air and the quality of gas and particles in the diluted exhaust gas, and to discharge the diluted exhaust gas.

[0058] The dilution air intake port 1 includes an...

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PUM

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Abstract

The invention relates to an automobile exhaust emission measuring device and method. The device comprises a diluent air inlet end, a dilution channel, an engine exhaust inlet end and a diluent exhaust outlet end, wherein the diluent air inlet end is used for measuring the content of gas and particulate matter in input diluent air, measuring the total flow of the input diluent air and inputting the diluent air into the dilution channel; the engine exhaust inlet end is used for inputting engine exhaust to the dilution channel; the dilution channel is used for receiving the input diluent air and engine exhaust and mixing the diluent air with the engine exhaust; the diluent exhaust outlet end is used for measuring the total flow of diluent exhaust obtained via the mixing of the engine exhaust and the diluent air and the content of gas and particulate matter in the diluent exhaust and discharging the diluent exhaust. According to the automobile exhaust emission measuring device and method, the influences of the dilution coefficient calculation error, the content of pollutants in the diluent air and the condensation and precipitation of vapor to a discharging experimental result can be avoided.

Description

technical field [0001] The invention relates to the field of vehicle emission detection, in particular to an automobile exhaust emission measurement device and method. Background technique [0002] Since the 1970s, the emission and fuel consumption of light-duty vehicles have been measured using the operating mode method through the full-flow constant-volume dilution sampling CVS system for air bag sampling and calculated by carbon balance theory. This method has a clear principle and a simple structure, and has been generally recognized by the automotive industry and certification bodies. [0003] In the full-flow constant-volume dilution sampling CVS system, all the engine exhaust is discharged into the mixing tee, mixed with the dilution air to form a diluted exhaust with a constant flow rate, and the diluted exhaust and diluted air are collected in the sampling air bag in a certain proportion. middle. Under the premise that the concentration of pollutants in the dilute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCY02A50/20
Inventor 石则强靖苏铜王伟叶松于志祥张红卫
Owner 交通运输部公路科学研究院