Inlet temperature control device for postprocessor of engine based on phase-change materials

Abstract

The invention relates to an inlet temperature control device for a postprocessor of an engine based on phase-change materials, which belongs to the technical field of engine air exhaust postprocessing and engine waste heat utilizing. A phase-change heat exchanger is connected between an air inlet pipe and an air outlet pipe of a U-shaped air exhaust pipe; an air inlet of the air inlet pipe and an air outlet of the air outlet pipe in the U-shaped air exhaust pipe 5 are placed in a main air exhaust pipe in front of a mixer; the air inlet of the air inlet pipe in the U-shaped air exhaust pipe 5 faces toward the direction opposite to the flowing direction of waste gas in the main air exhaust pipe; the air outlet of the air outlet pipe in the U-shaped air exhaust pipe faces toward the direction that is the same as the flowing direction of the waste gas in the main air exhaust pipe; a proportional control valve connected with a control module is installed on the air inlet pipe of the U-shaped air exhaust pipe; one end of each of three temperature sensors is fixedly connected with the inlet end of the main air exhaust pipe, the outlet end of the phase-change heat exchanger and the outlet end of the main air exhaust pipe, and the other end of each of the three temperature sensors is connected with the control module. The inlet temperature control device can control the environment in the main air exhaust pipe within the ideal temperature range, so that the postprocessor exerts the best effect, and the exhaust waste heat energy recovery and utilization is realized.

Description

technical field [0001] The invention belongs to the technical field of engine exhaust aftertreatment and engine waste heat utilization, and specifically relates to a device for phase change material to absorb or release heat through phase change and to control the inlet temperature of the afterprocessor. Background technique [0002] As automobile exhaust pollution becomes more and more serious, automobile exhaust emission regulations are becoming more and more stringent. The internal purification of the engine can no longer meet the strict regulations, and the technical route of combining internal purification and post-processing can meet stricter regulatory standards. [0003] However, the existing after-treatment technologies include selective catalytic reduction (SCR) after-treatment system, particulate capture (DPF) after-treatment system, oxidation catalytic converter (DOC) and particle oxidation catalytic converter (POC), etc. Post-treatment technologies need to achi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a U-shaped exhaust pipe bypass with a phase change heat exchanger, which can make the waste gas passing through the U-shaped exhaust pipe and the Exhaust gas mixing in the main exhaust pipe, the temperature of the mixed exhaust gas can reach the ideal temperature range, and solve the problem of too high or too low ambient temperature in the main exhaust pipe

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