Flexible sampling system and sampling method for tail gas of motor vehicle
A sampling system and motor vehicle technology, applied in sampling, sampling device, measuring device and other directions, can solve the problem of unable to realize automatic adjustment of flow at the same time, and achieve the effect of easy implementation, simple system structure and convenient operation
Active Publication Date: 2019-12-17
TONGJI UNIV
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However, the platform cannot automatically adjust the sampling dilution ratio and flow rate at the same time
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[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0028] Such as figure 1 As shown, this embodiment provides a flexible sampling system for motor vehicle exhaust, including a mixed gas buffer tank 5, which is connected with an exhaust gas inlet 1, an air inlet 2, a mixed gas sampling port 8, and an exhaust gas outlet 7. The sampling system also includes a control unit 10 and an exhaust gas flow meter 3 connected to the control unit 10, an air flow control valve 4 and a mixed gas sampling control valve 6, and the exhaust gas flow meter 3 is arranged between the exhaust gas inlet 1 and the mixed gas buffer tank 5 In between, the air f...
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The invention relates to a flexible sampling system and sampling method for tail gas of a motor vehicle. The sampling system comprises a mixed gas buffer tank; the mixed gas buffer tank is connected with a tail gas inlet, an air inlet, a mixed gas sampling port and a tail gas outlet; the system further comprises a control unit, and a tail gas flow meter, an air flow control valve and a mixed gas sampling control valve connected with the control unit; and the tail gas flowmeter is arranged between the tail gas inlet and the mixed gas buffer tank, the air flow control valve is arranged between the air inlet and the mixed gas buffer tank, and the mixed gas sampling control valve is arranged between the mixed gas sampling port and the mixed gas buffer tank. According to a sampling method, oneselected from a) a constant dilution ratio and variable flow control mode, b) a constant flow and variable dilution ratio control mode and c) a dilution ratio and flow flexible adjustment control modeis used to sample the tail gas of motor vehicle. Compared with the prior art, the sampling method has the advantages of being simple in structure, easy to implement, convenient to operate and the like.
Description
technical field [0001] The invention belongs to the field of motor vehicle emission testing, and relates to a tail gas collection device, in particular to a motor vehicle tail gas flexible sampling system and a sampling method. Background technique [0002] With the development of science and technology, motor vehicles have become an indispensable means of transportation in our lives, but the exhaust gas emitted by motor vehicles has become one of the important sources of air pollution. Motor vehicle exhaust contains a large number of harmful substances, including carbon monoxide, nitrogen oxides, hydrocarbons, particulate matter, and organic ions. Reducing motor vehicle exhaust pollutants and meeting increasingly stringent emission regulations are key technical issues that the motor vehicle industry urgently needs to solve. In this context, it is necessary to conduct laboratory and actual road test measurements of motor vehicle exhaust pollutants to understand and evaluate...
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IPC IPC(8): G01N1/22
CPCG01N1/2252G01N2001/2255
Inventor 胡志远谢毅罗军谭丕强楼狄明
Owner TONGJI UNIV