Particulate matter deposition path experiment table and experiment method
A technology of particulate matter and experimental bench, which is applied in the direction of analyzing materials and instruments, and can solve problems such as cooling and heat exchange efficiency decline, economical deterioration, engine NOx and PM emissions, etc.
Active Publication Date: 2016-08-31
XIHUA UNIV
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Problems solved by technology
When the EGR gas passes through the cooler, the soot contained in the exhaust gas will be deposited on the surface of the heat exchange element of the EGR cooler under the effects of thermophoretic force, diffusion, electrostatic force and condensation to form carbon deposits. The existence of carbon deposits will cause EGR intercooler heat exchange efficiency drops by 20-30%, which leads to engine NOx and PM emissions and economical deterioration
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[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0042] Such as figure 1 As shown, a kind of particle deposition path test bench includes ECU, variable length EGR cooler 5 and the EGR intake pipe 2 for being connected to the engine exhaust manifold 1; the EGR intake pipe 2 is connected to the possible The air inlet of the variable-length EGR cooler 5, and the air outlet of the variable-length EGR cooler 5 are connected to the EGR outlet pipe 8 through the cooler outlet pipe 52, and the EGR outlet pipe 8 is provided with a flow meter 9 and an EGR back pressure valve 10 ; The air inlet pipe 51 of the cooler is provided with an air inlet gas analyzer 4, an air inlet particle analyzer 23, an air inlet temperature sensor 25 and an air inlet pressure sensor 26; the air outlet pipe 52 of the cooler is provided with an air outlet air analyzer , an air outlet particle analyzer 15 , an air outlet temp...
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The invention discloses a particulate matter deposition path experiment table and experiment method. The experiment table comprises an ECU, an EGR cooler with variable length and an EGR air outlet pipe; the EGR air outlet pipe is provided with a flowmeter, an air inlet end particulate matter analyzer, an air inlet temperature sensor and an air inlet pressure sensor are arranged on an air inlet pipe of the cooler, and an air outlet end particulate matter analyzer is arranged on an air outlet pipe of the cooler; the EGR cooler with variable length comprises a cooling liquid circulating pipe and a heat exchange core pipe, the cooling liquid circulating pipe is connected to cooling liquid thermostatic equipment, a water inlet temperature sensor is arranged on a cooling liquid inlet pipe, and the two ends of the heat exchange core pipe are communicated with the air inlet pipe and the air outlet pipe of the cooler respectively. Particulate matter deposition paths within all particle size ranges in the heat exchange pipe and the corresponding relation between the particulate matter deposition paths and heat exchange efficiency can be obtained through testing, and the powerful direction and support are provided for research work of improving cooler performance.
Description
technical field [0001] The invention relates to the technical field of exhaust gas recirculation of internal combustion engines, in particular to an experimental platform and an experimental method for particle deposition paths. Background technique [0002] Exhaust gas recirculation (EGR) technology is one of the key technologies to solve NOx and PM emissions from diesel engines. The cooled EGR can achieve a better compromise in terms of NOx, PM emissions and engine economy. When the EGR gas passes through the cooler, the soot contained in the exhaust gas will be deposited on the surface of the heat exchange element of the EGR cooler under the effects of thermophoretic force, diffusion, electrostatic force and condensation to form carbon deposits. The existence of carbon deposits will cause The heat exchange efficiency of the EGR intercooler drops by 20-30%, which in turn leads to engine NOx and PM emissions and economical deterioration. The thermophoretic force is the mai...
Claims
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IPC IPC(8): G01N15/04
CPCG01N15/04
Inventor 田维张洵刘智李鑫
Owner XIHUA UNIV