KR20120054314A - Exhaust gas post processing system - Google Patents

Exhaust gas post processing system Download PDF

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Publication number
KR20120054314A
KR20120054314A KR1020100115634A KR20100115634A KR20120054314A KR 20120054314 A KR20120054314 A KR 20120054314A KR 1020100115634 A KR1020100115634 A KR 1020100115634A KR 20100115634 A KR20100115634 A KR 20100115634A KR 20120054314 A KR20120054314 A KR 20120054314A
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South Korea
Prior art keywords
exhaust gas
particle filter
engine
gasoline particle
exhaust
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KR1020100115634A
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Korean (ko)
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최무영
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현대자동차주식회사
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Priority to KR1020100115634A priority Critical patent/KR20120054314A/en
Priority to JP2011120916A priority patent/JP2012112374A/en
Priority to US13/181,187 priority patent/US20120124977A1/en
Priority to CN2011102080454A priority patent/CN102477893A/en
Priority to DE102011051987A priority patent/DE102011051987A1/en
Publication of KR20120054314A publication Critical patent/KR20120054314A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F01N2410/02—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of high temperature, e.g. overheating of catalytic reactor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

PURPOSE: A post-processing system of exhaust gases, capable of decreasing fuel consumptions and a decline in outputs because the exhaust gas selectively passes through a GPF(Gasoline Particulate Filter) according to an operating condition of an exhaust gas engine. CONSTITUTION: A post-processing system of exhaust gases comprises a exhaust line(110), a GPF(Gasoline Particulate Filter)(130), a bypass line(140), and a controller(160). The exhaust gas discharged from an engine(100) passes through the exhaust line. The GPF is installed in the exhaust line and filters harmful materials in the exhaust gas. The bypass line is installed in the exhaust line and the exhaust gas is bypassed through the by pass line. The controller senses a driving condition of the engine and passes the exhaust gas through the GPF. The controller passes the exhaust gas to the bypass line.

Description

배기가스 후처리 시스템{EXHAUST GAS POST PROCESSING SYSTEM}Exhaust gas aftertreatment system {EXHAUST GAS POST PROCESSING SYSTEM}

본 발명은 엔진에서 배출되는 배기가스에 포함된 입자상물질을 걸러내는 가솔린입자필터(GPF: gasoline particulate filter)를 포함하는 배기가스 후처리 시스템에 관한 것이다.The present invention relates to an exhaust gas aftertreatment system including a gasoline particulate filter (GPF) for filtering particulate matter contained in exhaust gas discharged from an engine.

일반적으로, 가솔린직분사(GDI: gasoline direct injection) 엔진은 실린더 내로 공기를 유입시키고, 실린더 안으로 연료를 직접 분사하는데, 디젤엔진과 같이 일정량의 입자상물질이 배기가스와 함께 배출된다.In general, a gasoline direct injection (GDI) engine introduces air into a cylinder and directly injects fuel into the cylinder, where a certain amount of particulate matter, such as a diesel engine, is discharged along with the exhaust gas.

이러한 입자상물질을 저감시키기 위해서, 가솔린입자필터(GPF: gasoline particulate filter)가 장착되기도 하는데, 상기 가솔린입자필터가 장착되는 경우, 배기라인의 배압이 증가하여, 출력이 저감되고 연료소모가 줄어드는 문제점이 있다.In order to reduce such particulate matter, a gasoline particulate filter (GPF) may be installed. When the gasoline particulate filter is installed, the back pressure of the exhaust line is increased to reduce the output and reduce fuel consumption. have.

따라서, 본 발명은 가솔린 직분사 엔진에서 배기가스에 포함된 입자상물질을 걸러내는 가솔린입자필터에 의해서 유발되는 출력감소와 연료소모를 줄일 수 있는 배기가스 후처리 시스템을 제공하는 것이다.Accordingly, the present invention provides an exhaust gas aftertreatment system that can reduce power consumption and fuel consumption caused by a gasoline particle filter that filters particulate matter contained in exhaust gas in a gasoline direct injection engine.

본 발명에 따른 배기가스 후처리 시스템은, 엔진에서 배출되는 배기가스가 지나는 배기라인, 상기 배기라인에 설치되어 배기가스에 포함된 유해물질을 걸러내는 가솔린입자필터, 상기 배기가스가 상기 가솔린입자필터를 바이패스 하도록 상기 배기라인에 설치되는 바이패스라인, 및 상기 엔진의 운전조건을 감지하고, 그 감지된 운전조건에 따라서 배기가스가 상기 가솔린입자필터를 지나도록 하거나, 상기 가솔린입자필터를 지나지 않고, 상기 바이패스라인을 지나도록 하는 제어부를 포함한다.Exhaust gas after-treatment system according to the present invention, an exhaust line through which the exhaust gas discharged from the engine passes, a gasoline particle filter installed in the exhaust line to filter out harmful substances contained in the exhaust gas, the exhaust gas is the gasoline particle filter Detects a bypass line installed in the exhaust line and operating conditions of the engine, and bypasses the gas through the gasoline particle filter or passes the gasoline particle filter according to the detected operating condition. And a controller for passing the bypass line.

상기 가솔린입자필터의 전단부에 설치되어 상기 가솔린입자필터로 유입되는 배기가스를 선택적으로 차단하는 메인밸브를 더 포함하고, 상기 제어부는, 상기 메인밸브를 닫아서, 배기가스가 상기 바이패스라인을 지나도록 한다.A main valve installed at a front end of the gasoline particle filter to selectively block the exhaust gas flowing into the gasoline particle filter, and the control unit closes the main valve so that the exhaust gas passes through the bypass line. To do that.

상기 바이패스라인에 설치되어 상기 바이패스라인을 지나는 배기가스를 선택적으로 차단하는 바이패스밸브를 더 포함한다.And a bypass valve installed in the bypass line to selectively block the exhaust gas passing through the bypass line.

상기 제어부는, 배기라인에 설치된 상기 가솔린입자필터를 가열시키기 위한 히팅로직이 적용되면, 배기가스가 상기 가솔린입자필터를 통과하도록 한다.The control unit, when a heating logic for heating the gasoline particle filter installed in the exhaust line is applied, allows the exhaust gas to pass through the gasoline particle filter.

상기 제어부는, 상기 엔진의 회전수를 감지하고, 그 회전수가 설정치를 초과하면, 배기가스가 상기 가솔린입자필터를 통과하도록 한다.The controller detects the rotational speed of the engine, and if the rotational speed exceeds a set value, exhaust gas passes through the gasoline particle filter.

상기 제어부는, 상기 엔진의 냉각수온을 감지하고, 그 냉각수온이 설정치 미만이면, 배기가스가 상기 가솔린입자필터를 통과하도록 한다.The control unit senses the cooling water temperature of the engine, and if the cooling water temperature is less than the set value, the exhaust gas passes through the gasoline particle filter.

상기 제어부는, 상기 엔진의 오일온도를 감지하고, 그 오일온도가 설정치 미만이면, 배기가스가 상기 가솔린입자필터를 통과하도록 한다.The controller detects the oil temperature of the engine, and if the oil temperature is less than the set value, the exhaust gas passes through the gasoline particle filter.

상기 제어부는, 차량의 속도를 감지하고, 그 속도가 설정치 이상이면, 배기가스가 상기 가솔린입자필터를 통과하도록 한다.The control unit senses the speed of the vehicle, and if the speed is greater than or equal to the set value, the exhaust gas passes through the gasoline particle filter.

상기 제어부는, 배기라인에 설치된 상기 가솔린입자필터를 가열시키기 위한 히팅로직이 적용되지 않고, 상기 엔진의 회전수가 설정치를 이상이고, 상기 엔진의 냉각수온이 설정치 이상이고, 상기 엔진의 오일온도가 설정치 이상이고, 차량의 속도가 설정치 미만이면, 배기가스가 상기 가솔린입자필터를 통과하지 않고, 상기 바이패스라인을 통해서 배출되도록 한다.The control unit is not applied to the heating logic for heating the gasoline particle filter installed in the exhaust line, the rotation speed of the engine is greater than the set value, the coolant temperature of the engine is greater than the set value, the oil temperature of the engine is set value If the vehicle speed is less than the set value, the exhaust gas is discharged through the bypass line without passing through the gasoline particle filter.

앞에서 기재된 바와 같이 본 발명에 따른 배기가스 후처리 시스템에서, 엔진의 운전조건에 따라서, 배기가스가 가솔린입자필터를 선택적으로 통과하도록 함으로써, 연료소모를 줄이고 출력저하를 줄일 수 있다.In the exhaust gas aftertreatment system according to the present invention as described above, by allowing the exhaust gas to selectively pass through the gasoline particle filter, depending on the operating conditions of the engine, it is possible to reduce the fuel consumption and reduce the output decrease.

도 1은 본 발명의 실시예에 따른 배기가스 후처리 시스템의 개략적인 구성도이다.
도 2는 본 발명의 실시예에 따른 배기가스 후처리 시스템을 제어하기 위한 플로우차트이다.
도 3은 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 엔진의 운전조건에 따른 배기가스입자의 양을 보여주는 그래프이다.
도 4는 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 엔진의 운전조건과 가솔린입자필터(GPF: gasoline particulate filter)의 관계를 나타내는 그래프이다.
도 5는 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 가솔린입자필터와 연료소모량의 관계를 나타내는 그래프이다.
도 6은 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 냉각수온과 배기가스에 포함된 입자량의 관계를 나타내는 그래프이다.1 is a schematic diagram of an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.
2 is a flowchart for controlling an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.
Figure 3 is a graph showing the amount of exhaust gas particles according to the operating conditions of the engine in the exhaust after-treatment system according to an embodiment of the present invention.
4 is a graph showing a relationship between an operating condition of an engine and a gasoline particulate filter (GPF) in an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.
5 is a graph illustrating a relationship between a gasoline particle filter and a fuel consumption amount in an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.
6 is a graph showing the relationship between the cooling water temperature and the amount of particles contained in the exhaust gas in the exhaust gas aftertreatment system according to the exemplary embodiment of the present invention.

이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 배기가스 후처리 시스템의 개략적인 구성도이다.1 is a schematic diagram of an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.

도 1을 참조하면, 배기가스 후처리 시스템은 엔진(100), 배기라인(110), 가솔린입자필터(130), 바이패스라인(140), 메인밸브(120), 바이패스밸브(150), 및 제어부(160)를 포함한다.Referring to FIG. 1, the exhaust gas aftertreatment system includes an engine 100, an exhaust line 110, a gasoline particle filter 130, a bypass line 140, a main valve 120, a bypass valve 150, And a controller 160.

상기 엔진(100)에서 배출되는 배기가스가 상기 배기라인(110)을 흐르고, 상기 가솔린입자필터(130)는 배기가스에 포함된 입자상물질을 걸러낸다. 상기 엔진(100)은 가솔린직분사 엔진으로, 실린더 내로 연료를 직접 분사하는 구조를 갖는다.Exhaust gas discharged from the engine 100 flows through the exhaust line 110, and the gasoline particle filter 130 filters particulate matter contained in the exhaust gas. The engine 100 is a gasoline direct injection engine, and has a structure of directly injecting fuel into a cylinder.

상기 배기라인(110)에는 상기 가솔린입자필터(130)를 바이패스하는 바이패스라인(140)이 배치되고, 상기 바이패스라인(140)에는 상기 바이패스밸브(150)가 설치될 수 있다.A bypass line 140 may be disposed in the exhaust line 110 to bypass the gasoline particle filter 130, and the bypass valve 150 may be installed in the bypass line 140.

아울러, 상기 가솔린입자필터(130)의 전단부의 상기 배기라인(110)에는 상기 가솔린입자필터(130)로 유입되는 배기가스를 선택적으로 차단하는 상기 메인밸브(120)가 설치된다. In addition, the main line 120 selectively blocks the exhaust gas flowing into the gasoline particle filter 130 in the exhaust line 110 at the front end of the gasoline particle filter 130.

따라서, 상기 제어부(160)에 의해서, 상기 메인밸브(120)가 닫히고, 상기 바이패스밸브(150)가 열리면, 상기 배기라인(110)을 지나는 배기가스는 상기 가솔린입자필터(130)를 지나지 않고, 상기 바이패스라인(140)으로 바이패스된다.Therefore, when the main valve 120 is closed by the controller 160 and the bypass valve 150 is opened, the exhaust gas passing through the exhaust line 110 does not pass through the gasoline particle filter 130. Bypass is bypassed to the bypass line 140.

아울러, 상기 제어부(160)에 의해서, 상기 메인밸브(120)가 열리고, 상기 바이패스밸브(150)가 닫히면, 상기 배기라인(110)을 지나는 배기가스는 상기 가솔린입자필터(130)를 지나고, 상기 바이패스라인(140)은 지나지 않는다.In addition, when the main valve 120 is opened and the bypass valve 150 is closed by the controller 160, the exhaust gas passing through the exhaust line 110 passes through the gasoline particle filter 130. The bypass line 140 does not pass.

특히, 배기가스가 상기 가솔린입자필터(130)를 지나는 경우, 배압이 상승하여, 출력이 저하되고, 연료의 소모가 늘어나는 문제점이 있다.In particular, when the exhaust gas passes through the gasoline particle filter 130, the back pressure is increased, the output is lowered, there is a problem that the consumption of fuel increases.

본 발명의 실시예에서는, 상기 제어부(160)는 엔진의 운전조건에 따라서, 배기가스를 선택적으로 상기 바이패스라인(140)을 통해서 바이패스 하도록 함으로써, 연료소모를 줄이고, 출력저하를 방지한다.In the embodiment of the present invention, the control unit 160 by bypassing the exhaust gas through the bypass line 140 in accordance with the operating conditions of the engine, thereby reducing fuel consumption and prevent output decrease.

상기 제어부(160)는, 상기 엔진(100)의 효율적인 운전을 위해서, 상기 가솔린입자필터(130)의 히팅을 위한 히팅로직을 수행하고, 상기 엔진(100)의 회전수, 냉각수온, 오일온도, 및 차속을 감지한다.The control unit 160 performs a heating logic for heating the gasoline particle filter 130 for efficient operation of the engine 100, the rotation speed of the engine 100, cooling water temperature, oil temperature, And detect vehicle speed.

도 2는 본 발명의 실시예에 따른 배기가스 후처리 시스템을 제어하기 위한 플로우차트이다.2 is a flowchart for controlling an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.

도 2를 참조하면, S200에서 제어가 시작되고, S210에서 엔진(100)이 시동된다.Referring to Figure 2, the control is started in S200, the engine 100 is started in S210.

S220에서 촉매(산화촉매, 가솔린입자필터 등)의 히팅을 위한 로직이 수행되는지 판단된다. 상기 촉매는 가솔린입자필터를 포함하여 배기라인에 설치되는 촉매를 모두 포함할 수 있다. 상기 S220에서 촉매의 히팅을 위한 로직이 수행되면, S280에서 배기가스가 상기 가솔린입자필터(130)(GPF)를 통과하도록 한다.In S220, it is determined whether logic for heating the catalyst (oxidation catalyst, gasoline particle filter, etc.) is performed. The catalyst may include all of the catalysts installed in the exhaust line including a gasoline particle filter. When logic for heating the catalyst is performed in S220, exhaust gas passes through the gasoline particle filter 130 (GPF) in S280.

S230에서, 상기 엔진(100)의 회전수(RPM: rotation per minute)가 설정수치를 초과하는 지 판단되고, 회전수가 설정수치를 초과하면, S280에서 배기가스가 상기 가솔린입자필터(130)를 통과하도록 한다.In S230, it is determined whether the rotation per minute (RPM) of the engine 100 exceeds a set value, and when the speed exceeds the set value, exhaust gas passes through the gasoline particle filter 130 in S280. Do it.

S240에서, 상기 엔진(100)의 냉각수온이 설정온도 미만인지가 판단되고, 냉각수온이 설정온도 미만이면, S280에서 배기가스가 상기 가솔린입자필터(130)를 통과하도록 한다.In S240, it is determined whether the cooling water temperature of the engine 100 is lower than the set temperature, and if the cooling water temperature is lower than the set temperature, the exhaust gas passes through the gasoline particle filter 130 in S280.

S250에서, 상기 엔진(100)의 오일온도가 설정온도 미만인지가 판단되고, 오일온도가 설정온도 미만이면, S280에서 배기가스가 상기 가솔린입자필터(130)를 통과하도록 한다.In S250, it is determined whether the oil temperature of the engine 100 is lower than the set temperature, and if the oil temperature is lower than the set temperature, the exhaust gas passes through the gasoline particle filter 130 in S280.

S260에서, 차량의 차속이 설정속도를 초과하는 지 판단되고, 차속이 설정속도를 초과하면, S280에서 배기가스가 상기 가솔린입자필터(130)를 통과하도록 한다.In S260, it is determined whether the vehicle speed of the vehicle exceeds the set speed, and when the vehicle speed exceeds the set speed, the exhaust gas passes through the gasoline particle filter 130 in S280.

S220, S230, S240, S250, 및 S260에서, 촉매의 히팅로직이 수행되지 않고, 엔진(100)의 회전수가 설정값 이하이고, 냉각수온이 설정값 이상이고, 오일온도가 설정값 이상이며, 차속이 설정값 이하이면, S270에서 배기가스가 상기 바이패스라인(140)을 통과하도록 하여, 배기가스가 상기 가솔린입자필터(130)를 지나지 못하도록 한다.In S220, S230, S240, S250, and S260, the heating logic of the catalyst is not performed, the rotation speed of the engine 100 is below the set value, the coolant temperature is above the set value, the oil temperature is above the set value, and the vehicle speed If it is less than or equal to this set value, the exhaust gas passes through the bypass line 140 in S270, so that the exhaust gas does not pass the gasoline particle filter 130.

따라서, 배기가스의 배압이 줄어들어, 출력의 저하와 연료소모 증가를 미연에 방지할 수 있다.Therefore, the back pressure of the exhaust gas is reduced, so that a decrease in output and an increase in fuel consumption can be prevented.

도 3은 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 엔진의 운전조건에 따른 배기가스입자의 양을 보여주는 그래프이다.Figure 3 is a graph showing the amount of exhaust gas particles according to the operating conditions of the engine in the exhaust after-treatment system according to an embodiment of the present invention.

도 3을 참조하면, 가로축은 시간을 나타내고, 세로축은 배기가스에 포함된 입자상물질(PM: particulate matters), 냉각수온, 오일온도, 촉매온도(가솔린입자필터의 온도), 및 배기온도를 포함한다.Referring to FIG. 3, the horizontal axis represents time, and the vertical axis includes particulate matters (PM), cooling water temperature, oil temperature, catalyst temperature (temperature of gasoline particle filter), and exhaust temperature included in exhaust gas. .

도시한 바와 같이, 배기가스에 포함된 입자상물질의 양은, 엔진의 냉각수온, 오일온도, 촉매온도, 및 배기가스온도와 상관관계를 갖는다.As shown, the amount of particulate matter contained in the exhaust gas has a correlation with the cooling water temperature, the oil temperature, the catalyst temperature, and the exhaust gas temperature of the engine.

특히, 냉각수온이 낮을수록, 입자상물질 배출양이 많고, 오일온도가 낮을 수록 입자상물질 배출양이 많다. In particular, the lower the cooling water temperature, the greater the amount of particulate matter discharged, and the lower the oil temperature, the greater the amount of particulate matter discharged.

또, 촉매온도와 배기가스온도가 낮을수록, 입자상물질의 배출양이 많다. 도시되지는 않았지만, 상기 엔진(100)의 회전수와 차속과 연관성이 있으며, 회전수가 높고 차속이 높으면, 입자상물질의 배출양이 많다.In addition, the lower the catalyst temperature and the exhaust gas temperature, the larger the amount of particulate matter discharged. Although not shown, there is a relationship between the rotational speed of the engine 100 and the vehicle speed, and when the rotational speed is high and the vehicle speed is high, the amount of particulate matter is discharged.

도 4는 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 엔진의 운전조건과 가솔린입자필터(GPF: gasoline particulate filter)의 관계를 나타내는 그래프이다.4 is a graph showing a relationship between an operating condition of an engine and a gasoline particulate filter (GPF) in an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.

도 4를 참조하면, 가로축은 엔진(100)의 회전수를 나타내고, 세로축은 출력(power)와 토크(torque)를 나타낸다. TWC는 삼원촉매를 나타내고, GPF는 가솔린입자필터(130)를 나타내며, bare는 촉매가 없는 것을 나타내고, 2X와 3X는 촉매의 양을 나타낸다.Referring to FIG. 4, the horizontal axis represents the number of revolutions of the engine 100, and the vertical axis represents power and torque. TWC represents a three-way catalyst, GPF represents a gasoline particle filter 130, bare represents no catalyst, and 2X and 3X represent the amount of catalyst.

도시한 바와 같이, 촉매가 코팅된 상기 가솔린입자필터(130)를 배기가스가 지나게 되면 엔진(100)의 출력과 토크가 줄어드는 것을 볼 수 있다.As shown, when the exhaust gas passes through the gasoline particle filter 130 coated with a catalyst can be seen that the output and torque of the engine 100 is reduced.

도 5는 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 가솔린입자필터와 연료소모량의 관계를 나타내는 그래프이다.5 is a graph illustrating a relationship between a gasoline particle filter and a fuel consumption amount in an exhaust gas aftertreatment system according to an exemplary embodiment of the present invention.

도 5를 참조하면, 가로축은 삼원촉매(TWC)와 가솔린입자필터(GPF)의 조합을 보여주고, 세로축은 단위 연료소모량을 나타낸다. 여기서, bare는 촉매가 없는 경우, 2X와 3X는 촉매의 양을 나타낸다.Referring to FIG. 5, the horizontal axis shows the combination of the three-way catalyst (TWC) and the gasoline particle filter (GPF), and the vertical axis shows the unit fuel consumption. Where bare represents the amount of catalyst when no catalyst is present.

도시한 바와 같이, 상기 가솔린입자필터(130)가 적용되거나, 촉매의 양이 늘어날수록, 단위 연료소모량이 증가하는 것을 인지할 수 있다.As shown, the gasoline particle filter 130 is applied, or as the amount of catalyst increases, it can be seen that the unit fuel consumption increases.

도 6은 본 발명의 실시예에 따른 배기가스 후처리 시스템에서 냉각수온과 배기가스에 포함된 입자량의 관계를 나타내는 그래프이다.6 is a graph showing the relationship between the cooling water temperature and the amount of particles contained in the exhaust gas in the exhaust gas aftertreatment system according to the exemplary embodiment of the present invention.

도 6을 참조하면, 가로축은 시간을 나타내고, 세로축은 냉각수온, 연료의 분사조건에 따른 입자의 양을 나타낸다.Referring to FIG. 6, the horizontal axis represents time, and the vertical axis represents the amount of particles according to cooling water temperature and fuel injection conditions.

도시한 바와 같이, 냉각수온과 연료의 분사조건에 따라서 배기가스에 포함되어 배출되는 입자상물질의 양이 다르게 분포된다. 특히, 냉각수온이 높아질수록 배기가스에 포함되어 배출되는 입자상물질의 양은 작아진다.As shown, the amount of particulate matter contained in the exhaust gas is differently distributed depending on the cooling water temperature and fuel injection conditions. In particular, the higher the cooling water temperature, the smaller the amount of particulate matter contained in the exhaust gas and discharged.

이상으로 본 발명에 관한 바람직한 실시예를 설명하였으나, 본 발명은 상기 실시예에 한정되지 아니하며, 본 발명의 실시예로부터 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의한 용이하게 변경되어 균등하다고 인정되는 범위의 모든 변경을 포함한다.While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

100: 엔진
110: 배기라인
120: 메인밸브
130: 가솔린입자필터
140: 바이패스라인
150: 바이패스밸브
160: 제어부100: engine
110: exhaust line
120: main valve
130: gasoline particle filter
140: bypass line
150: bypass valve
160:

Claims (9)

엔진에서 배출되는 배기가스가 지나는 배기라인;
상기 배기라인에 설치되어 배기가스에 포함된 유해물질을 걸러내는 가솔린입자필터;
상기 배기가스가 상기 가솔린입자필터를 바이패스 하도록 상기 배기라인에 설치되는 바이패스라인; 및
상기 엔진의 운전조건을 감지하고, 그 감지된 운전조건에 따라서 배기가스가 상기 가솔린입자필터를 지나도록 하거나, 상기 가솔린입자필터를 지나지 않고, 상기 바이패스라인을 지나도록 하는 제어부; 를 포함하는 배기가스 후처리 시스템.An exhaust line through which the exhaust gas discharged from the engine passes;
A gasoline particle filter installed in the exhaust line to filter out harmful substances contained in the exhaust gas;
A bypass line installed in the exhaust line so that the exhaust gas bypasses the gasoline particle filter; And
A control unit for detecting an operating condition of the engine and allowing exhaust gas to pass through the gasoline particle filter or to pass the bypass line according to the detected operating condition; Exhaust gas aftertreatment system comprising a. 제1항에서,
상기 가솔린입자필터의 전단부에 설치되어 상기 가솔린입자필터로 유입되는 배기가스를 선택적으로 차단하는 메인밸브를 더 포함하고,
상기 제어부는, 상기 메인밸브를 닫아서, 배기가스가 상기 바이패스라인을 지나도록 하는 배기가스 후처리 시스템.In claim 1,
A main valve installed at a front end of the gasoline particle filter to selectively block the exhaust gas flowing into the gasoline particle filter;
And the control unit closes the main valve so that exhaust gas passes through the bypass line. 제2항에서,
상기 바이패스라인에 설치되어 상기 바이패스라인을 지나는 배기가스를 선택적으로 차단하는 바이패스밸브를 더 포함하는 배기가스 후처리 시스템.In claim 2,
And a bypass valve installed in the bypass line to selectively block the exhaust gas passing through the bypass line. 제2항에서,
상기 제어부는, 배기라인에 설치된 상기 가솔린입자필터를 가열시키기 위한 히팅로직이 적용되면, 배기가스가 상기 가솔린입자필터를 통과하도록 하는 배기가스 후처리 시스템.In claim 2,
The control unit, after the heating logic for heating the gasoline particle filter installed in the exhaust line, exhaust gas after-treatment system for passing through the gasoline particle filter. 제2항에서,
상기 제어부는, 상기 엔진의 회전수를 감지하고, 그 회전수가 설정치를 초과하면, 배기가스가 상기 가솔린입자필터를 통과하도록 하는 배기가스 후처리 시스템.In claim 2,
The control unit, after detecting the rotational speed of the engine, if the rotational speed exceeds a set value, exhaust gas after-treatment system for passing through the gasoline particle filter. 제2항에서,
상기 제어부는, 상기 엔진의 냉각수온을 감지하고, 그 냉각수온이 설정치 미만이면, 배기가스가 상기 가솔린입자필터를 통과하도록 하는 배기가스 후처리 시스템.In claim 2,
The control unit, after detecting the cooling water temperature of the engine, if the cooling water temperature is less than the set value, exhaust gas after-treatment system for passing through the gasoline particle filter. 제2항에서,
상기 제어부는, 상기 엔진의 오일온도를 감지하고, 그 오일온도가 설정치 미만이면, 배기가스가 상기 가솔린입자필터를 통과하도록 하는 배기가스 후처리 시스템.In claim 2,
The control unit, after detecting the oil temperature of the engine, if the oil temperature is less than the set value, exhaust gas after-treatment system to pass through the gasoline particle filter. 제2항에서,
상기 제어부는, 차량의 속도를 감지하고, 그 속도가 설정치 이상이면, 배기가스가 상기 가솔린입자필터를 통과하도록 하는 배기가스 후처리 시스템.In claim 2,
The control unit, after detecting the speed of the vehicle, the exhaust gas after-treatment system for passing the exhaust gas through the gasoline particle filter if the speed is above the set value. 제2항에서,
상기 제어부는,
배기라인에 설치된 상기 가솔린입자필터를 가열시키기 위한 히팅로직이 적용되지 않고, 상기 엔진의 회전수가 설정치를 이상이고, 상기 엔진의 냉각수온이 설정치 이상이고, 상기 엔진의 오일온도가 설정치 이상이고, 차량의 속도가 설정치 미만이면,
배기가스가 상기 가솔린입자필터를 통과하지 않고, 상기 바이패스라인을 통해서 배출되도록 하는 것을 특징으로 하는 배기가스 후처리 시스템.In claim 2,
The control unit,
The heating logic for heating the gasoline particle filter installed in the exhaust line is not applied, the engine speed is above the set value, the coolant temperature of the engine is above the set value, the oil temperature of the engine is above the set value, and the vehicle If the speed of is below the set point,
And exhaust gas through the bypass line without passing through the gasoline particle filter.
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US13/181,187 US20120124977A1 (en) 2010-11-19 2011-07-12 Exhaust gas post processing system
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DE102011051987A1 (en) 2012-05-24

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