KR20030096939A - regeneration system of filter for eliminating particulate material of diesel engine - Google Patents
regeneration system of filter for eliminating particulate material of diesel engine Download PDFInfo
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- KR20030096939A KR20030096939A KR1020020034041A KR20020034041A KR20030096939A KR 20030096939 A KR20030096939 A KR 20030096939A KR 1020020034041 A KR1020020034041 A KR 1020020034041A KR 20020034041 A KR20020034041 A KR 20020034041A KR 20030096939 A KR20030096939 A KR 20030096939A
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- particulate matter
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- diesel engine
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
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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
- 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
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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)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
본 발명은 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치에 관한 것으로, 보다 상세하게는 디젤 엔진의 연소후 배출되는 입자상 물질을 포집하는 필터의 재생 시기를 판단하고서 이에 연료의 2차 분사 제어를 통한 배기 가스 온도의 상승을 매개로 필터에 포집된 입자상 물질을 제거함으로써, 필터의 효과적인 재생을 도모할 수 있도록 하는 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치에 관한 것이다.The present invention relates to a regeneration device for removing particulate matter of a diesel engine, and more particularly, to determine a regeneration time of a filter for collecting particulate matter discharged after combustion of a diesel engine, thereby controlling secondary injection of fuel. The present invention relates to a regeneration apparatus for a particulate matter removal filter of a diesel engine, by which particulate matter trapped in a filter is removed through an increase in exhaust gas temperature, thereby enabling effective regeneration of the filter.
일반적으로 디젤 엔진은 가솔린 엔진에 비해 뛰어난 연비와 출력 등의 장점을 갖고 있음에도 불구하고, 연소후 유해 물질의 일종인 질소 산화물(NOx)의 배출이 심하다는 특성을 가지고 있다. 이에 따라, 디젤 엔진에서는 연소후 배기 계통을 통해 배출되는 배기 가스중 포함된 미연소 배기 가스를 다시 흡기 계통으로 공급하여 연소실내에서 재연소될 수 있도록 하는 배기 가스 재순환 장치(EGR;exhaust gas recirculation)가 채택되고 있는 실정이다.In general, although diesel engines have advantages such as excellent fuel economy and output compared to gasoline engines, they have a characteristic of high emission of nitrogen oxides (NOx), which is a kind of harmful substances after combustion. Accordingly, in a diesel engine, an exhaust gas recirculation (EGR) for supplying unburned exhaust gas included in the exhaust gas discharged through the exhaust system after combustion to the intake system to be reburned in the combustion chamber. Is being adopted.
그런데, 상기 배기 가스 재순환 장치는 연소후 배출되는 배기 가스중 유해 물질의 일종인 질소 산화물의 함유를 줄이는 데에는 효과적이나, 배기 가스의 재연소를 위한 순환중 입자상 물질(PM;Particulate Material)과 같은 다른 오염 물질을 다량으로 배출하게 되는 맹점이 있다.However, the exhaust gas recirculation apparatus is effective in reducing the content of nitrogen oxide, which is a kind of harmful substance in the exhaust gas discharged after combustion, but other components such as PM (Particulate Material) in circulation for recombustion of the exhaust gas. There is a blind spot to release a large amount of pollutants.
이와 같은 현상은 미연소 배기 가스를 재연소시키는 과정에서 필연적으로 수반되는 것이다. 이에 따라 현재에는 입자상 물질과 같은 유해한 오염 물질의 저감을 위한 많은 노력들이 경주되고 있는 실정이다.This phenomenon is inevitably involved in the reburning of unburned exhaust gas. As a result, many efforts to reduce harmful pollutants such as particulate matter are currently underway.
또한, 최근 들어 상기 입자상 물질이 대기를 오염시키는 데 가장 중요한 원인으로 작용하고, 이와 더불어 인체에도 많은 악영향을 미치는 것으로 보고되고 있어, 최근에는 입자상 물질을 줄이는 데 각광을 받는 기술이 개발되고 있는 바, 그 중에 하나가 디젤 엔진용 입자상 물질의 제거 시스템(Diesel Particulate Material Filtering System)이다.In addition, recently, it has been reported that the particulate matter acts as the most important cause for polluting the air, and also has a number of adverse effects on the human body, and in recent years, a technology that receives attention in reducing particulate matter has been developed, One of them is the Diesel Particulate Material Filtering System.
즉, 상기 디젤 엔진용 입자상 물질의 제거 시스템은 연소후 배출되는 입자상 물질을 배기계에 구비된 필터를 통해 일정량 포집하였다가, 포집된 입자상 물질을 연소후 배출되는 배기 가스의 온도를 이용하여 연소시켜 제거하는 기술로서, 이 시스템에서 배기계에 구비되는 필터는 연소후 배출되는 배기 가스중 포함된 오염 물질인 입자상 물질을 효과적으로 포집할 수 있는 것으로 검증받은 바 있다.That is, the particulate matter removal system for the diesel engine collects a certain amount of particulate matter discharged after combustion through a filter provided in the exhaust system, and then burns the collected particulate matter by burning it using the temperature of the exhaust gas discharged after combustion. In this system, the filter provided in the exhaust system has been proven to effectively collect particulate matter, which is a pollutant contained in the exhaust gas discharged after combustion.
그런데, 종래 디젤 엔진용 입자상 물질의 제거 시스템에서 배기계에 구비된 필터내에 포집된 입자상 물질은 연소후 배출되는 배기 가스의 온도에 의해 연소되도록 되어 있으나, 디젤 엔진은 이의 특성상 연소후 배출되는 배기 가스의 온도가 입자상 물질을 연소시키는 데 필요한 550 내지 600℃ 보다 훨씬 낮은 대략 200 내지 300℃이므로, 필터에 포집된 입자상 물질을 연소시키는 데에 곤란한 단점이 있다.By the way, the particulate matter trapped in the filter provided in the exhaust system in the conventional particulate matter removal system for diesel engines is to be burned by the temperature of the exhaust gas discharged after combustion, the diesel engine is due to the characteristics of the exhaust gas discharged after combustion Since the temperature is approximately 200 to 300 ° C., much lower than the 550 to 600 ° C. required to burn particulate matter, there is a disadvantage in that it is difficult to burn particulate matter trapped in the filter.
이에 따라, 디젤 엔진에서 연소후 배출되는 배기 가스의 온도를 상승시키기 위해 많은 연구들이 수행되었는 데, 이의 일환으로 연구되고 있는 것이 커먼 레일엔진에서 연료의 메인 분사(main injection)후 이루어지는 연료의 후분사(post injection)와, 배기계에서 산화 촉매를 이용한 배기 가스 온도의 상승 또는, 연료 첨가제의 주입 등을 들 수 있는 데, 이와 같은 방안들은 현재 개발중이거나, 실제 차량에 적용되는 경우는 거의 없는 실정이다.Accordingly, many studies have been conducted to increase the temperature of exhaust gas discharged after combustion in a diesel engine, which is being studied as part of the post-injection of fuel after main injection of fuel in a common rail engine. (post injection), an increase in exhaust gas temperature using an oxidation catalyst in the exhaust system, or injection of fuel additives, which are currently under development or are rarely applied to actual vehicles. .
또한, 상기와 같이 디젤 엔진에서 배기 가스의 온도를 상승시키고자 연구되고 있는 방안중에서, 연료의 후분사의 경우에는 제어 유니트가 엔진으로부터 각종 차량의 정보를 입력받아 이를 통해 디젤 엔진용 입자상 물질의 제거 시스템에서 필터의 정확한 재생 시기를 파악하여야 하는 어려움이 있다.In addition, in the above-described methods to increase the temperature of the exhaust gas in the diesel engine, in the case of post-injection of fuel, the control unit receives various vehicle information from the engine and thereby removes particulate matter for the diesel engine. There is a difficulty in knowing the exact time of regeneration of the filter in the system.
그리고, 필터의 재생 요구 시점을 판단한 다음에도 필터의 재생에 알맞은 연료의 후분사량이나 이를 위한 분사 시간의 정밀한 제어를 도모해야 하는 제어의 정밀성이 수반되어야 하므로 제어 유니트의 제어 로직이 복잡해 짐과 더불어 정밀한 제어가 가능한 제어 유니트의 개발이 선행되어야 하는 곤란함이 있다.In addition, after determining the time required for regeneration of the filter, control precision of the post injection amount of fuel suitable for regeneration of the filter or precise control of the injection time for the filter must be accompanied, which leads to complicated control logic and precise control. There is a difficulty that the development of a control unit capable of control must be preceded.
또한, 연료의 후분사를 정밀하게 수행하는 제어 유니트의 개발이 이루어지는 경우에도 잦은 연료의 후분사로 인해 차량의 연비와 출력의 저하를 초래하게 되는 단점이 있다.In addition, even when the development of a control unit for precisely performing the post-injection of fuel is made, there is a disadvantage in that the fuel efficiency and output of the vehicle are lowered due to frequent post-injection of fuel.
이에 본 발명은 상기와 같은 점을 감안하여 안출된 것으로, 디젤 엔진용 입자상 물질의 제거 시스템에서 필터에 포집된 입자상 물질의 정확한 재생 시점을 검출함과 더불어, 입자상 물질의 연소에 필요한 적정 수준의 연료를 분사함으로써, 필터에 포집된 입자상 물질을 적시에 효율적으로 제거할 수 있도록 하는 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치를 제공하는 데 그 목적이 있다.Accordingly, the present invention has been made in view of the above-mentioned point, and detects an accurate regeneration time of particulate matter trapped in a filter in a particulate matter removal system for a diesel engine, and at the appropriate level of fuel required for combustion of particulate matter. It is an object of the present invention to provide a regeneration device for a particulate matter removal filter of a diesel engine that can efficiently and timely remove particulate matter trapped in a filter by spraying.
상기와 같은 목적을 달성하기 위한 본 발명은, 배기계에 구비된 필터에 포집된 입자상 물질의 재생 시점을 감지하는 포집량 검출부와; 이 포집량 검출부를 통해 검출된 입자상 물질의 재생 시점을 근거로 하여 입자상 물질의 연소에 필요한 연료의 분사 시기를 제어하는 제어 유니트 및; 이 제어 유니트의 제어에 따라 배기 계통으로 연료를 분사시키도록 배기 관로상에 설치된 연료 공급부를 포함하여 구성되는 것을 특징으로 한다.The present invention for achieving the above object, the collection amount detection unit for detecting the regeneration time of the particulate matter collected in the filter provided in the exhaust system; A control unit for controlling the injection timing of the fuel required for combustion of the particulate matter on the basis of the regeneration time of the particulate matter detected by the trapping amount detector; And a fuel supply unit provided on the exhaust conduit to inject fuel into the exhaust system according to the control of the control unit.
도 1은 본 발명에 따른 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치의 구성을 도시한 블럭도.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a regeneration device for a particulate matter removal filter of a diesel engine according to the present invention.
도 2는 도 1의 구성을 구체적으로 도시한 도면.2 is a view showing in detail the configuration of FIG.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
10-필터10a-압력 센서10-filter 10a-pressure sensor
12-포집량 검출부14-온도 검출부12-capacity detector 14-temperature detector
16-제어 유니트18-디젤 엔진16-control unit 18-diesel engine
20-연료 공급부22-배기 관로20-fuel supply 22-exhaust duct
24-산화 촉매24a-압력 센서24-oxidation catalyst 24a-pressure sensor
26-온도 센서28-연료 탱크26-temperature sensor 28-fuel tank
30-연료 펌프32-공급 관로30-fuel pump 32-supply pipeline
34-2차 인젝터34-2nd injector
이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치의 구성을 도시한 블럭도이고, 도 2는 도 1의 구성을 구체적으로 도시한 도면이다.1 is a block diagram showing the configuration of the regeneration device of the particulate matter removal filter of the diesel engine according to the present invention, Figure 2 is a view showing the configuration of FIG.
본 발명은 도면에 도시된 바와 같이, 디젤 엔진용 입자상 물질의 제거 시스템에서 필터(10)에 포집된 입자상 물질의 정확한 재생 시점을 감지하는 포집량 검출부(12)와, 현재 연소후 배출되는 배기 가스의 온도를 감지하는 온도 검출부(14)를 각각 입력 수단으로 구성한다.The present invention, as shown in the drawings, in the particulate matter removal system for diesel engines, the collection amount detection unit 12 for detecting the correct regeneration time of the particulate matter collected in the filter 10, and the exhaust gas discharged after the current combustion Each of the temperature detectors 14 for detecting the temperature of the input means.
그리고, 상기 입력 수단을 통해 검출된 입자상 물질의 재생 시점과 배기 가스의 온도를 근거로 하여 입자상 물질의 제거에 필요한 최적의 연료 분사 시기와 분사 시간을 제어하는 제어 유니트(16)를 제어 수단으로 구성한다.And a control unit 16 for controlling the optimum fuel injection timing and injection time necessary for the removal of the particulate matter on the basis of the regeneration time of the particulate matter detected by the input means and the temperature of the exhaust gas. do.
또한, 상기 제어 수단으로부터 출력되는 제어 신호에 따라 디젤 엔진(18)의 배기 계통으로 고압의 연료를 분사시켜 입자상 물질의 연소를 도모하는 연료 공급부(20)를 출력 수단으로 구성한다.In addition, the fuel supply part 20 which injects a high-pressure fuel to the exhaust system of the diesel engine 18 in response to the control signal output from the said control means, and aims at combustion of particulate matter is comprised as an output means.
여기서, 상기 포집량 검출부(12)는 디젤 엔진(18)의 배기 관로(22)상에 배기 가스중 포함된 입자상 물질을 포집하도록 구비된 필터(10)의 후단부와, 배기 가스와 반응하여 배기 가스의 온도를 상승시킴으로써 입자상 물질의 연소에 기여하도록 구비된 산화 촉매(24)의 전단부에 각각 설치된 압력 센서(10a,24a)로 구현되는 바, 상기 제어 유니트(16)는 이들 압력 센서(10a,24a)로부터 검출되는 압력값으로부터 상기 필터(10)에 포집된 입자상 물질에 대한 정확한 재생 시점을 판단할 수 있게 된다.Here, the collection amount detector 12 is exhausted in response to the rear end of the filter 10 provided to collect particulate matter contained in the exhaust gas on the exhaust pipe 22 of the diesel engine 18 and the exhaust gas. The control unit 16 is implemented by pressure sensors 10a and 24a respectively provided at the front end of the oxidation catalyst 24 provided to contribute to the combustion of particulate matter by raising the temperature of the gas. , It is possible to determine the exact regeneration time for the particulate matter collected in the filter 10 from the pressure value detected from, 24a.
즉, 상기 필터(10)에 입자상 물질의 포집된 정도가 심할 경우에는 상기 압력 센서(10a,24a) 사이의 압력 차이가 비례적으로 커지는 것을 매개로 하여 상기 제어 유니트(16)는 필터(10)의 재생 시기를 판단할 수 있는 것이다.That is, when the degree of trapping of particulate matter in the filter 10 is severe, the control unit 16 controls the filter 10 on the basis that the pressure difference between the pressure sensors 10a and 24a increases proportionally. You can determine when to play.
그리고, 상기 온도 검출부(14)는 디젤 엔진(18)의 배기 관로(22)상에 배기 가스의 온도를 검출하도록 구비된 온도 센서(26)로 구현되는 바, 상기 제어 유니트(16)는 온도 센서(26)로부터 검출되는 배기 가스의 온도값으로부터 상기 필터(10)에 포집된 입자상 물질의 연소에 필요한 최적의 연료량을 판단할 수 있게 된다.In addition, the temperature detector 14 is implemented as a temperature sensor 26 provided to detect the temperature of the exhaust gas on the exhaust pipe 22 of the diesel engine 18, the control unit 16 is a temperature sensor From the temperature value of the exhaust gas detected from (26), it is possible to determine the optimum amount of fuel necessary for the combustion of the particulate matter collected in the filter 10.
즉, 상기 배기 관로(22)를 통해 배출되는 배기 가스의 온도와, 상기 입자상 물질을 연소시키기 위한 적정 수준의 온도와의 사이의 차이에 따라, 상기 제어 유니트(16)는 입자상 물질의 연소에 최적의 수준으로 배기 가스의 온도를 상승시키도록 상기 연료 공급부(20)에 적정 수준의 제어 신호를 인가하여 입자상 물질을 연소시킬 수 있는 것이다.That is, according to the difference between the temperature of the exhaust gas discharged through the exhaust conduit 22 and the temperature of an appropriate level for burning the particulate matter, the control unit 16 is optimal for the combustion of particulate matter. The particulate matter may be combusted by applying a control signal of an appropriate level to the fuel supply unit 20 so as to raise the temperature of the exhaust gas to a level of.
또한, 상기 연료 공급부(20)는 소정량의 연료가 저장된 연료 탱크(28)내에 설치되어 연료를 고압으로 송출하는 연료 펌프(30)와, 이 연료 펌프(30)와 공급 관로(32)를 매개로 연결됨과 더불어 상기 배기 관로(22)상에서 산화 촉매(24)의 앞부분에 설치된 2차 인젝터(34)로 이루어진다.In addition, the fuel supply unit 20 is installed in a fuel tank 28 in which a predetermined amount of fuel is stored, and supplies a fuel pump 30 for delivering the fuel at high pressure, and the fuel pump 30 and the supply pipe 32 are mediated. In addition, it consists of a secondary injector 34 installed in front of the oxidation catalyst 24 on the exhaust pipe 22.
그리고, 본 발명의 상기 제어 유니트(16)는 디젤 엔진(18)내에 구비되어 엔진을 구동시키기 위한 메인 인젝터인 1차 인젝터(36)의 작동을 제어하는 메인 제어 유니트(40)와는 별도로 상기 디젤 엔진용 입자상 물질의 제거 시스템의 전용으로 구비되는 것으로, 상기 필터(10)에 포집된 입자상 물질에 대한 재생 시점과 제거에 필요한 연료의 분사량과 분사 시간만을 제어하는 입자상 물질의 제거를 위한 전용의 제어 장치로 구성함이 바람직하다.In addition, the control unit 16 of the present invention is provided in the diesel engine 18 to separate the diesel engine from the main control unit 40 that controls the operation of the primary injector 36, which is the main injector for driving the engine. Dedicated control device for the removal of particulate matter, which is provided exclusively for the removal system for the particulate matter, and controls only the injection time and the injection time of the fuel required for the removal of the particulate matter collected in the filter 10 and the injection time. It is preferable to comprise.
이는, 상기 메인 제어 유니트(40)가 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치의 제어에 참여하지 않고 차량의 운전을 위한 원래의 기본적인 제어 기능만을 전담함으로써, 제어의 곤란성을 해소하기 위함과 더불어, 기존의 구성에 별도로 본 발명에 따른 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치를 손쉽게 적용함으로써 기존의 메인 제어 유니트(40)를 변경없이 그대로 사용하기 위함이기도 하다.This is because the main control unit 40 does not participate in the control of the regeneration device of the particulate matter removing filter of the diesel engine and is dedicated to the original basic control function for driving the vehicle, thereby eliminating the difficulty of control. In addition, it is also to use the existing main control unit 40 without change by easily applying the regeneration device of the particulate matter removal filter of the diesel engine according to the present invention in addition to the existing configuration.
도면중 미설명 부호 42는 흡기 공기용 냉각 장치이고, 44는 상기 연료 탱크(28)와 1차 인젝터(36) 사이의 연료의 공급을 도모하는 메인 공급 관로이다.In the figure, reference numeral 42 denotes a cooling device for intake air, and 44 denotes a main supply line for supplying fuel between the fuel tank 28 and the primary injector 36.
따라서, 상기 제어 유니트(16)는 상기 포집량 검출부(12)의 압력센서(10a,24a)를 매개로 하여 상기 필터(10)내에 포집된 입자상 물질의 축적량에 따라 필터(10)의 재생 시기를 판단하게 된다.Therefore, the control unit 16 determines the regeneration time of the filter 10 according to the accumulation amount of particulate matter collected in the filter 10 via the pressure sensors 10a and 24a of the collection amount detecting unit 12. You will be judged.
그리고, 상기 제어 유니트(16)는 상기 온도 검출부(14)의 온도 센서(26)를 매개로 하여 상기 배기 관로(22)내로 유동되는 배기 가스의 온도를 검출하여 상기 필터(10)내에 포집된 입자상 물질의 연소에 필요한 최적의 연료 분사량을 판단하게 된다.In addition, the control unit 16 detects the temperature of the exhaust gas flowing into the exhaust conduit 22 through the temperature sensor 26 of the temperature detector 14 and collects the particulate matter collected in the filter 10. The optimum fuel injection amount required for the combustion of the material will be determined.
이와 같은 일련의 과정이 종료되면, 상기 제어 유니트(16)는 2차 인젝터(34)를 제어하여 공급 관로(32)를 통해 2차 인젝터(34)로 공급된 연료를 배기 관로(22)내로 분사시켜 주게 된다.When such a series of processes is completed, the control unit 16 controls the secondary injector 34 to inject the fuel supplied to the secondary injector 34 through the supply conduit 32 into the exhaust conduit 22. Will let you.
이 결과, 상기 배기 관로(22)내로 분사된 연료는 배기 가스의 온도에 의해 착화되어 200 내지 300℃ 정도인 배기 가스의 온도를 1차적으로 100 내지 200℃ 만큼 더 상승시키게 되고, 이후 배기 가스는 상기 산화 촉매(24)와 반응하여 상기 필터(10)에 포집된 입자상 물질을 연소시키는 데 적당한 온도인 550 내지 600℃까지 가열되어 입자상 물질을 연소시키게 된다.As a result, the fuel injected into the exhaust conduit 22 is ignited by the temperature of the exhaust gas so as to raise the temperature of the exhaust gas, which is about 200 to 300 ° C., by 100 to 200 ° C. first, and then the exhaust gas is Reaction with the oxidation catalyst 24 is heated to 550 to 600 ℃ which is a temperature suitable for burning the particulate matter collected in the filter 10 to burn the particulate matter.
한편, 상기 제어 유니트(16)가 2차 인젝터(34)를 제어함에 있어, 상기 제어 유니트(16)는 상기 배기 관로(22)를 통해 유동되는 배기 가스의 온도가 낮으면 연료의 분사량을 증가시키는 반면에, 배기 가스의 온가가 높으면 상대적으로 연료의 분사량을 줄이는 제어를 하게 되므로, 불필요한 연료의 낭비를 방지함과 더불어, 잦은 연료의 2차 분사로 인해 연비의 저하와 출력의 저하를 배제하게 된다.On the other hand, in the control unit 16 controls the secondary injector 34, the control unit 16 increases the injection amount of the fuel when the temperature of the exhaust gas flowing through the exhaust pipe 22 is low On the other hand, if the temperature of the exhaust gas is high, the fuel injection quantity is relatively controlled, thereby preventing unnecessary fuel waste and eliminating fuel consumption and output reduction due to frequent secondary injection of fuel. .
이상 설명한 바와 같이 본 발명에 따른 디젤 엔진의 입자상 물질 제거용 필터의 재생 장치에 의하면, 상기 디젤 엔진(18)의 배기계에 구비된 필터(10)에 포집된 입자상 물질에 대한 정확한 재생 시기와 재생에 필요한 연료의 분사량을 최적으로 제어함에 따라, 연소후 배출되는 오염 물질인 입자상 물질의 양을 최대한 줄일 수 있게 된다.As described above, according to the regeneration device of the particulate matter removal filter of the diesel engine according to the present invention, the regeneration time and regeneration of the particulate matter trapped in the filter 10 included in the exhaust system of the diesel engine 18 is reduced. By optimally controlling the injection amount of the fuel required, it is possible to minimize the amount of particulate matter, which is a pollutant discharged after combustion.
또한, 상기 배기 관로(22)로 입자상 물질의 연소를 위해 연료의 분사를 제어하는 제어 유니트(16)가 엔진에서 메인 인젝터(36)의 작동을 제어하는 메인 제어 유니트(40)와는 별도로 필터(10)의 재생 시점과 재생을 위한 2차 분사만을 전적으로 제어함에 따라 제어 로직의 단순화와 함께, 정밀한 제어를 위한 추가적인 제어 유니트의 개발이 필요하지 않게 되므로, 적용의 용이성을 부여할 수 있게 된다.In addition, the control unit 16 for controlling the injection of fuel for combustion of particulate matter into the exhaust conduit 22 is separate from the main control unit 40 for controlling the operation of the main injector 36 in the engine. By controlling only the regeneration time and the secondary injection for regeneration alone, the control logic can be simplified, and further development of an additional control unit for precise control is not required, thereby providing ease of application.
Claims (5)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020034041A KR20030096939A (en) | 2002-06-18 | 2002-06-18 | regeneration system of filter for eliminating particulate material of diesel engine |
| JP2002344714A JP2004019651A (en) | 2002-06-18 | 2002-11-27 | Recycling device of filter for eliminating particulate matter of diesel engine |
| US10/326,012 US20030230076A1 (en) | 2002-06-18 | 2002-12-18 | Filter regeneration system for eliminating particulate matter generated in a diesel engine |
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| KR1020020034041A KR20030096939A (en) | 2002-06-18 | 2002-06-18 | regeneration system of filter for eliminating particulate material of diesel engine |
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| KR20030096939A true KR20030096939A (en) | 2003-12-31 |
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| KR1020020034041A KR20030096939A (en) | 2002-06-18 | 2002-06-18 | regeneration system of filter for eliminating particulate material of diesel engine |
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| US (1) | US20030230076A1 (en) |
| JP (1) | JP2004019651A (en) |
| KR (1) | KR20030096939A (en) |
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| JPS59134315A (en) * | 1983-01-24 | 1984-08-02 | Nissan Motor Co Ltd | Regenerating burner controller for exhaust particle collecting trap in internal-combustion engine |
| JPS59147814A (en) * | 1983-02-15 | 1984-08-24 | Nissan Motor Co Ltd | Regenerating burner control device for trap collecting exhaust fine particle in internal-combustion engine |
| KR960001919U (en) * | 1994-06-02 | 1996-01-19 | 박연태 | Roof Tile |
| KR20000045746A (en) * | 1998-12-30 | 2000-07-25 | 정주호 | Device for oxidizing discharging gas in intermittent method for diesel vehicle |
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| KR100879146B1 (en) * | 2004-07-23 | 2009-01-19 | 제너럴 모터즈 코오포레이션 | Diesel exhaust aftertreatment device regeneration system |
| US7704473B2 (en) | 2004-10-26 | 2010-04-27 | Ict Co., Ltd. | Method and device for controlling exhaust emission from internal combustion engine |
| KR100807795B1 (en) * | 2006-04-12 | 2008-02-27 | 주식회사 유투에스 | Apparatus and method for regenerating diesel particulate filter, and a medium having computer readable program executing the method |
| KR100778185B1 (en) * | 2006-05-15 | 2007-11-22 | 쌍용자동차 주식회사 | Control methods of particulate regeneration using diesel particulate filter trap for diesel hybrid vehicle |
| KR101320420B1 (en) * | 2007-04-16 | 2013-10-22 | 주식회사 에코닉스 | Injector And Decreasing Device of Exhaust Gas having it |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030230076A1 (en) | 2003-12-18 |
| JP2004019651A (en) | 2004-01-22 |
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