An EGR exhaust gas purification, cooling and pressurization integrated device

Abstract

The invention discloses an EGR (exhaust gas recirculation) exhaust purification, cooling and pressurization integrated device which comprises an electrostatic precipitation unit, a centrifugal dedusting and pressurization unit, a cooling unit and a shell, wherein the electrostatic precipitation unit is mounted on a bottom plate; the centrifugal dedusting and pressurization unit is arranged on the electrostatic precipitation unit; the cooling unit and the shell are sequentially connected outside the centrifugal dedusting and pressurization unit in a sleeving manner; an inlet port for EGR exhaust is formed in the bottom plate; and an outlet port is formed in the shell. Compared with the prior art, the EGR exhaust purification, cooling and pressurization integrated device has the beneficial effects of being novel in structural design, integrating EGR exhaust purification and dedusting, cooling and pressurization into one device, simultaneously realizing the effects of EGR exhaust purification and dedusting, cooling and pressurization and effectively improving pollution of EGR exhaust to a piping system and an engine; and in addition, cooling of EGR exhaust can increase the gas inflow of mixed gas and the quantity of EGR exhaust and can be combined with the function of EGR exhaust pressurization to meet the requirement of a high-load working condition for a large EGR rate in low-temperature combustion.

Description

technical field [0001] The invention belongs to the field of engine intake and exhaust control systems, is mainly used for controlling the recirculation exhaust gas of automobiles and off-road engines, and relates to an integrated device for purifying, cooling and pressurizing EGR exhaust gas. Background technique [0002] The exhaust gas recirculation system is used in the engine field to reduce the combustion temperature in the cylinder, reduce NOx emissions, and improve the emission performance of the engine. [0003] After investigation, the existing EGR (exhaust gas recirculation) cooling system adopts two introduction methods, inside and outside the machine. The introduction inside the machine adopts the timing adjustment of the variable valve mechanism to realize the direct introduction of exhaust gas from the exhaust valve, which is not harmful to the exhaust gas. do any processing. The EGR piping system and EGR valve are set outside the machine to introduce the exh...

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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide an engine that can simultaneously purify, dust remove, and cool down in view of the existing engine EGR introduction schemes that are prone to fouling, corrosion, and leakage, and have the disadvantages of difficult cleaning, large volume, and inconvenient disassembly and assembly. EGR exhaust gas purification, cooling and pressurization integrated device with compact structure, simple cleaning, and convenient disassembly and assembly

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