A test method for heat exchange efficiency test bench of exhaust gas recirculation intercooler
A technology of exhaust gas recirculation and heat exchange efficiency, applied in the direction of internal combustion engine testing, etc., can solve problems such as economical deterioration, cold heat exchange efficiency decline, and PM content increase
Active Publication Date: 2017-07-11
XIHUA UNIV
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Problems solved by technology
Steady-state carbon deposition will lead to a 20-30% drop in EGR intercooler heat exchange efficiency, resulting in NO in the exhaust gas emitted by the engine x , PM content increases, and the economy becomes worse
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[0032] Below in conjunction with accompanying drawing, the present invention will be further described: figure 1 As shown, a test bench for heat exchange efficiency of an exhaust gas recirculation intercooler includes an exhaust manifold 1, a front EGR pipe 2, a rear EGR pipe 17, and an EGR tail pipe 25; one end of the front EGR pipe 2 is used to connect the intercooler to be tested. 8 air inlet, the other end is connected to the exhaust main pipe 1, one end of the rear EGR pipe 17 is used to connect the air outlet of the intercooler 8, and the other end is connected to the EGR tail pipe 25; the front EGR pipe 2 is provided with a front gas The sampling port 3, the front pressure sensor 4 and the front temperature sensor 5, the front gas sampling port 3 is connected to the front gas analyzer 6; the EGR tailpipe 25 is provided with a rear gas sampling port 20, a rear pressure sensor 21, and a rear temperature sensor 22 , and the back pressure valve 24, the rear gas sampling por...
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The invention discloses an exhaust gas re-circulation inter-cooler heat exchange efficiency test bench and test method. According to the test bench, one end of a front EGR tube is connected with a gas inlet of the inter-cooler, the other end is connected with an exhaust manifold, and one end of a rear EGR tube is connected with a gas outlet of the inter-cooler while the other end is connected with an EGR tail tube; the front EGR tube is provided with a front temperature sensor, and the EGR tail tube is provided with a rear temperature sensor; the test bench further comprises a cooling liquid thermostat, a cooling liquid water discharge pipe used for connecting the cooling liquid thermostat with a water outlet of the inter-cooler, and a cooling liquid water inlet pipe used for connecting the cooling liquid thermostat with a water inlet of the inter-cooler, and the cooling liquid water inlet pipe is provided with a cooling liquid inlet temperature sensor; an electronic control unit calculates the heat exchange efficiency of the inter-cooler through gathering temperature values of the front temperature sensor, cooling liquid inlet temperature sensor and rear temperature sensor. The exhaust gas re-circulation inter-cooler heat exchange efficiency test bench and test method are capable of detecting the heat exchange efficiency of the inter-cooler in real time and good for solving the problems of large NOx and PM content in the exhaust gas discharged by an engine and economical efficiency degradation.
Description
technical field [0001] The invention relates to the technical field of exhaust gas recirculation (EGR) of an internal combustion engine, in particular to a test bench and a test method for heat exchange efficiency of an exhaust gas recirculation intercooler. Background technique [0002] Exhaust gas recirculation (EGR) technology is a solution to diesel engine NO x One of the effective measures for (nitrogen oxides) emissions, especially the intercooled EGR in NO x , PM (particulate matter) content and economy can achieve a better compromise level. While cooling the EGR, the soot (soot) and HCs (hydrocarbons) contained in the exhaust are deposited on the surface of the heat exchange element of the EGR intercooler under the effects of thermophoretic force, static electricity, diffusion and condensation to form a deposit. carbon. Steady-state carbon deposition will lead to a 20-30% drop in EGR intercooler heat exchange efficiency, resulting in NO in the exhaust gas emitted ...
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IPC IPC(8): G01M15/04
Inventor 田维潘锁柱张洵郭道演
Owner XIHUA UNIV