A kind of anti-clogging egr system and control method

Abstract

The invention discloses an anti-blockage EGR (Exhaust Gas Recirculation) system and a control method. The anti-blockage EGR system comprises an EGR cooling unit, an exhaust waste heat exchange device, an NTP (Non-Thermal Plasma) injection system and a control module, wherein the exhaust waste heat exchange device is arranged at the tail end of an exhaust pipeline; a snake loop pipeline is arranged inside the exhaust waste heat exchange device; the inlet of the snake loop pipeline is connected with the NTP injection system; a nozzle is arranged at the tail end of an injection pipeline at the outlet of the snake loop pipeline; the nozzle extends to the inlet of the EGR cooling unit; both the EGR cooling unit and the NTP injection system are connected with the control module. Oxidation removal of carbon deposit can be realized under the situation that the temperature is lower than the engine exhaust particulate matter combustion temperature; through the exhaust waste heat exchange device for an engine, the reaction reaches a proper reaction temperature range; under the state of normal work of one EGR cooler branch, instant regeneration is performed on another EGR cooler branch, so that regeneration of an EGR cooler is realized efficiently in an energy-saving way, and the problem of blockage of the EGR system is solved.

Description

technical field [0001] The invention relates to the field of engine emission control, in particular to an anti-clogging EGR system and a control method. Background technique [0002] Exhaust Gas Recirculation (EGR) can effectively reduce engine NO X emission. The function of the EGR system is to reintroduce part of the exhaust gas of the engine into the cylinder, dilute the fresh working fluid, reduce the combustion temperature, and thereby suppress NO X generation. However, if the exhaust gas temperature is too high, the combustion efficiency and output power of the engine will be reduced. For this reason, an EGR cooler can be added to the EGR system for cooling to improve engine emission and economy. For engines with higher cooling performance requirements, multiple EGR coolers can also be added. [0003] However, when the exhaust gas flows through the EGR cooler and is cooled to the fouling temperature, it is easy to cause liquid hydrocarbons and water vapor to conden...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides an anti-clogging EGR system, which utilizes an exhaust waste heat exchange device and an NTP active gas injection device to realize the regeneration of the EGR cooler and solve the problem of EGR system blockage

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