Supercharged diesel engine EGR (Exhaust Gas Recirculation) system intelligent cooling device

Abstract

The invention discloses a supercharged diesel engine EGR (Exhaust Gas Recirculation) system intelligent cooling device, comprising an EGR mixer (3), a mechanical water pump (4), an electric control fan (5), a radiator (6), a thermolator (11), an EGR cooler (13), an electric control EGR valve (14), an engine ECU (Electronic Control Unit) (18), a temperature sensor (19), an exhaust gas intercooler (8) and an electric control two-position three-way valve (12), wherein an inlet of the electric control two-position three-way valve (12) is communicated with a gas outlet of the EGR cooler (13); outlets in two ends of the electric control two-position three-way valve (12) are respectively communicated with an exhaust gas inlet of the EGR mixer (3) and a gas inlet of the exhaust gas intercooler (8); a gas outlet of the exhaust gas intercooler (8) is communicated with the exhaust gas inlet of the EGR mixer (3); the electric control EGR valve (14), the electric control fan (5), the temperature sensor (19) and the electric control two-position three-way valve (12) are respectively connected with the engine ECU (18) electrically.

Description

technical field [0001] The invention relates to an exhaust gas recirculation system of a supercharged diesel engine, more specifically relates to an intelligent cooling device for an EGR system of a supercharged diesel engine, and belongs to the technical field of exhaust gas reuse. Background technique [0002] With the increasing national automobile exhaust emission standards, the engine exhaust after-treatment system has become an indispensable system for the engine; the main harmful substances emitted by engine combustion are nitrogen oxides (NOx) and various particulates (PM). To reduce the emission of toxic gases, the EGR system (Exhaust Gas Recirculation, exhaust gas recirculation system) is usually used to achieve emission reduction. The EGR system introduces part of the exhaust gas after engine combustion into the intake system, mixes it with fresh mixed gas, and then enters the cylinder to participate in combustion, reducing the oxygen content in the combustion cha...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the existing supercharged diesel engine EGR system cooling device leads to excessive cooling of part-load exhaust gas, thereby reducing the reliability of components, the inability to obtain the best mixing temperature at each working point, and the slow process of engine startup and warm-up, etc., to provide An intelligent cooling device for supercharged diesel engine EGR system

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