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Heavy-duty vehicle rapid portable emission measurement system and method

A technology for heavy-duty vehicle and emission testing, applied in vehicle testing, machine/structural component testing, measuring devices, etc.

Active Publication Date: 2015-08-19
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
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Problems solved by technology

[0012] The on-board test obtains the emission of a single vehicle on the actual road, which can provide effective data support for the analysis and simulation of the emission characteristics of motor vehicles under actual driving conditions, but it has many equipment components, complicated operation, and time-consuming Long (about 1 day), mainly used in heavy-duty vehicle emission compliance supervision required by regulations, but it is difficult to achieve rapid detection

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  • Heavy-duty vehicle rapid portable emission measurement system and method
  • Heavy-duty vehicle rapid portable emission measurement system and method
  • Heavy-duty vehicle rapid portable emission measurement system and method

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Embodiment Construction

[0065] The fast vehicle-mounted emission test system of the invention only needs one exhaust gas analyzer and one data output device, and can be used for spot inspection and road inspection of heavy vehicle emission.

[0066] The rapid vehicle-mounted emission testing system of the present invention includes a gas circuit system including a zero gas or span gas circuit, a sample gas processing unit, a waste water and a waste gas unit; the sample gas processing unit includes a sampling pipe, a condenser pipe, a water eliminator, a sample gas Air pump; the waste water and waste gas unit includes waste water pipe and waste gas pipe; the inlet of the sampling pipe is communicated with the outlet of the exhaust pipe of the heavy-duty vehicle; the air outlet of the water eliminator is communicated with the inlet of the sample gas pump, and its water outlet is communicated with the waste water pipe; the analysis system includes a control Valve unit, particulate filter, conventional ex...

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Abstract

The invention relates to heavy-duty vehicle rapid portable emission measurement system and method. The system and the method use a rapid portable emission measurement system to carry out tests emphasis on NOx and CO2 concentration in tail gas. The NOx and CO2 concentrations in the tail gas are used to calculate a NOx emission factor based on per-unit CO2 emission, and then through quantity transformational relation between the NOx emission factor and a work-based window NOx specific emission, a heavy-duty vehicle emission value which can be directly compared with a reference limit value is derived. Compared with a relatively mature European work-based window method, the method eliminates calculation on the size of a work-based window and moving average work-based window specific emission, thereby greatly simplifying data analysis operation. The system and the method can more conveniently and rapidly determine NOx emission level of a heavy-duty vehicle, and are used for spot check and road inspection of heavy-duty vehicle emission.

Description

technical field [0001] The invention relates to a heavy-duty vehicle emission testing system and method, in particular to a heavy-duty vehicle on-board emission testing system and method. Background technique [0002] The regulatory approach to heavy-duty vehicle emissions testing is primarily simulation testing on laboratory engine benches. The engine bench test is easy to control the test conditions, and the test results have good repeatability. It is the most commonly used method in the emission testing of heavy-duty vehicles. [0003] However, the bench simulation test is to test the emission of the engine according to the set working conditions, which cannot really reflect the emission characteristics of heavy vehicles when they are driving on the actual road. For the emission test of heavy-duty vehicles, the engine bench test method also has the problems of complicated operation, long time and high cost. [0004] In response to the increasingly prominent demand for s...

Claims

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Application Information

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IPC IPC(8): G01M17/007
Inventor 胡京南鲍晓峰何立强郭兴祖雷
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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