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engine exhaust gas recirculation system

A recirculation system and engine technology, applied in the direction of exhaust gas recirculation, combustion engine, engine components, etc., can solve the problems of high cost, rising price, and reduced commodity, so as to minimize pumping loss, improve low-speed power characteristics, and improve The effect of postprocessing efficiency

Active Publication Date: 2022-03-08
현대두산인프라코어주
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since such a turbocharger is more expensive than a fixed geometry turbocharger (FGT, FixedGeometry Turbocharger), there is a problem of lower commerciality due to price increases

Method used

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  • engine exhaust gas recirculation system
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Embodiment Construction

[0030] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] In each drawing of the present invention, for the sake of accuracy of the present invention, the size of the structure is shown enlarged than actual.

[0032] In the present invention, terms such as first and second can be used to describe various components, but the above-mentioned components should not be limited by the above-mentioned terms. The above terms may only be used to distinguish one constituent element from another constituent element.

[0033] When referring to a constituent element being "connected" or "linked to" another constituent element, it should be understood that it may be directly connected or connected to another constituent element, or there may be other constituent elements interposed therebetween. Conversely, when it is referred to that a constituent element is "directly connected to" or "directly connected t...

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Abstract

The present invention provides an exhaust gas recirculation system of an engine, comprising: an intake line connected to the engine to supply intake gas; an exhaust line connected to the engine to discharge a part of the exhaust gas discharged from the engine to the outside a turbocharger having a turbine provided on the exhaust line and a compressor provided on the intake line; an aftertreatment device provided on the exhaust line downstream of the turbine and for purifying the exhaust gas; a low-pressure EGR device for recirculating a part of the exhaust gas discharged through the after-treatment device to the engine on the downstream side of the after-treatment device; and a wastegate device connected to the The other part of the exhaust gas exhausted from the engine is discharged to the outside by the engine, and includes a bypass line connected to the exhaust line between the downstream side of the turbine and the upstream side of the after-treatment device, and for Another portion of the exhaust gas is supplied to the aftertreatment device through the bypass line, not via the turbine.

Description

technical field [0001] The invention relates to an exhaust gas recirculation system of an engine. More specifically, it relates to an exhaust gas recirculation system of an engine equipped with a dual EGR device. Background technique [0002] To cope with increasingly stringent exhaust gas regulations for diesel engines, exhaust gas recirculation (EGR) devices, exhaust gas aftertreatment devices, etc. may be used. [0003] The exhaust gas recirculation device includes high-pressure-EGR (HP-EGR, High Pressure exhaust gas recirculation) and low-pressure-EGR (LP-EGR, Low Pressure exhaust gas recirculation). In order to apply large-capacity EGR while reducing pumping loss, a dual EGR (Dual EGR) device that uses high-pressure-EGR and low-pressure EGR at the same time can be used. On the other hand, in order to increase the efficiency of the exhaust gas aftertreatment device, it is important to increase the temperature at the front end of the aftertreatment system. [0004] Con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/06F02M26/05F02M26/42F02M26/61
CPCF02M26/05F02M26/06F02M26/42F02M26/61Y02T10/12F02M26/615
Inventor 曺慈允
Owner 현대두산인프라코어주
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