KR101199122B1 - DPF filter structure having improved pressure regulating device - Google Patents

DPF filter structure having improved pressure regulating device Download PDF

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KR101199122B1
KR101199122B1 KR1020050000121A KR20050000121A KR101199122B1 KR 101199122 B1 KR101199122 B1 KR 101199122B1 KR 1020050000121 A KR1020050000121 A KR 1020050000121A KR 20050000121 A KR20050000121 A KR 20050000121A KR 101199122 B1 KR101199122 B1 KR 101199122B1
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pressure
cpf
doc
exhaust gas
measuring
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KR20060079664A (en
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박형철
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기아자동차주식회사
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E02D17/205—Securing of slopes or inclines with modular blocks, e.g. pre-fabricated
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/16—Shapes
    • E02D2200/1628—Shapes rectangular
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/16—Shapes
    • E02D2200/1692—Shapes conical or convex
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements
    • 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)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Environmental Sciences (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

본 발명의 스틸하우징에 DOC및 CPF구간을 차례로 설치하여 자동차의 배기가스가 필터링 되도록 한 자동차 배기가스용의 DPF필터는, DOC의 입구 압력을 측정하는 압력측정관과 CPF의 출구 압력을 측정하는 압력측정관에 추가하여 상기 CPF의 입구 압력을 측정하는 압력측정관을 더 설치하고 있다. 그리고, 본 발명은 CPF의 전후로 스틸하우징에 연결된 바이패스관을 더 설치하고, 이 바이패스관에 바이패스밸브를 설치하여, DOC의 입구 압력을 측정하는 압력측정관과 CPF의 출구 압력을 측정하는 압력측정관에서 각각 측정된 압력값의 차가 엔진 스톨을 가져오는 소정값 이상인 경우 바이패스밸브를 개방하도록 하고 있다.In the steel housing of the present invention, the DPF filter for automobile exhaust gas in which DOC and CPF sections are sequentially installed to filter automobile exhaust gas is a pressure measuring tube for measuring DOC inlet pressure and a pressure for measuring outlet pressure of CPF. In addition to the measuring tube, a pressure measuring tube for measuring the inlet pressure of the CPF is further installed. The present invention further provides a bypass pipe connected to the steel housing before and after the CPF, and installs a bypass valve in the bypass pipe to measure the inlet pressure of the DOC and the outlet pressure of the CPF. The bypass valve is to be opened when the difference between the pressure values measured at the pressure measuring tube is equal to or larger than a predetermined value that brings the engine stall.

Description

개선된 압력조절기구를 가진 자동차의 ＤＰＦ필터 구조{DPF filter structure having improved pressure regulating device}DPF filter structure having improved pressure regulating device

도1은 선행기술의 DPF필터의 내부 구성을 도시한 사시도;1 is a perspective view showing an internal configuration of a DPF filter of the prior art;

도2는 선행기술의 DPF필터에서 DOC와 CPF에서 배기가스의 흐름을 모식적으로 도시한 단면도;2 is a cross-sectional view schematically showing the flow of exhaust gas in DOC and CPF in the DPF filter of the prior art;

도3은 선행기술의 DPF필터에서 CPF의 구조를 도시한 단면도;3 is a cross-sectional view showing the structure of a CPF in the DPF filter of the prior art;

도4는 본 발명의 DPF필터의 내부 구성을 도시한 사시도;4 is a perspective view showing an internal configuration of a DPF filter of the present invention;

도5는 본 발명의 DPF필터에서 CPF의 구조를 모식적으로 도시한 단면도;5 is a sectional view schematically showing the structure of a CPF in the DPF filter of the present invention;

도6a 및 도6b는 도5에서 바이패스 밸브를 확대 도시한 작용도이다.6A and 6B are enlarged view of the bypass valve in FIG.

<도면의 주요 부분의 부호에 대한 설명>        DESCRIPTION OF THE RELATED ART [0002]

(1): DPF필터 (2): CPF (3) DOC(1): DPF filter (2): CPF (3) DOC

(5): 압력파이프 (10): 바이패스 밸브(5): pressure pipe (10): bypass valve

본 발명은 개선된 압력조절기구를 가진 자동차의 DPF필터 구조에 관한 것이 다. 구체적으로 본 발명은 자동차 디젤 엔진의 DPF필터에 있어 압력 모니터링을 정확히 할 수 있고, 엔진 페일(failure)현상을 방지하도록 개량된 압력조절기구를 가진 자동차의 DPF필터 구조에 관한 것이다.The present invention relates to a DPF filter structure of an automobile having an improved pressure regulating mechanism. Specifically, the present invention relates to a DPF filter structure of a vehicle having a pressure regulating mechanism that can accurately monitor pressure in a DPF filter of an automobile diesel engine and prevent an engine fail phenomenon.

차량의 배기가스는 엔진으로부터 연소된 혼합기가 배기관을 통하여 대기중으로 방출되는 가스를 말하는데, 이러한 배기가스에는 일산화탄소, 질소산화물 및 미연소탄화수소가 주를 이룬다. 그런데, 특히 디젤 엔진 차량에 있어서는 공기가 대부분의 운전 조건에서 충분한 상태로 연소되기 때문에 일산화탄소와 탄화수소는 가솔린 차량에 비하여 아주 적게 배출되나, 질소 산화물 및 입자상 물질(매연)이 많이 배출된다.The exhaust gas of a vehicle refers to a gas in which a mixer combusted from an engine is released into the atmosphere through an exhaust pipe, which is mainly composed of carbon monoxide, nitrogen oxides, and unburned hydrocarbons. However, especially in diesel engine vehicles, carbon monoxide and hydrocarbons are emitted very little compared to gasoline vehicles because air is sufficiently burned in most driving conditions, but nitrogen oxides and particulate matter (soot) are emitted much.

이러한 배기가스를 필터링하기 위하여 디젤 엔진 차량은 통상 도1에 도시한 DPF(diesel particulate filter)필터(1‘)를 구비하고 있다. DFP필터(1’)는 봄베 형상의 스틸하우징(4)에 DOC(3; diesel oxidization catalyst)및 CPF(2;catalyzed particulated filter)구간을 설치하여 배기가스가 이 구간을 지나면서 촉매에 의해 산화되고, 특히 CPF(2)구간에서 입자상 물질이 충분히 필터링 되게 한 후 외부로 배출시키고 있다. In order to filter such exhaust gas, a diesel engine vehicle is usually provided with a diesel particulate filter (DPF) filter 1 'shown in FIG. The DFP filter 1 'is provided with a diesel oxidization catalyst (DOC) and a catalyzed particulated filter (CPF) section in the cylinder-shaped steel housing 4, whereby the exhaust gas is oxidized by the catalyst as it passes through the section. In particular, the particulate matter is sufficiently filtered in the CPF (2) section and then discharged to the outside.

DPF필터(1‘)에 의한 필터링 작용을 구체적으로 살펴보면, 도2에 도시한 것과 같이, DOC(3)에서는 배기가스가 불투과성의 촉매벽(3’)을 따라 실질적으로 평행류를 이루어 전진하면서 산화된다. 그런데, CPF(2)에서는 그 단면도를 도시한 도3에서 알 수 있는 것과 같이, 촉매가 있는 다공질벽(2‘)의 전단과 후단에 엇갈려서 플러그(2“)를 배치함으로써, DOC(3)를 통과한 배기가스가 상하의 다공질벽(2 ’)을 통과하면서 입자상 물질이 그 표면에 퇴적되도록 하고 있다. 이와 같이 침전된 입자상 물질은 필터 내부의 온도 증가에 의하여 연소되며, 이로써 숯 검댕(soot)의 발생이 저감될 수 있다. Looking specifically at the filtering action by the DPF filter (1 '), as shown in Figure 2, in the DOC (3) the exhaust gas is advanced in substantially parallel flow along the impermeable catalyst wall (3') Is oxidized. However, in the CPF 2, as shown in Fig. 3 showing the cross-sectional view, the DOC 3 is formed by arranging the plug 2 'at the front and rear ends of the porous wall 2' with the catalyst. The exhaust gas passing through the porous walls 2 'above and below allows the particulate matter to be deposited on the surface thereof. The particulate matter thus precipitated is burned by an increase in the temperature inside the filter, thereby reducing the generation of char soot.

또, 도1의 (5‘) 및 (5“)은 압력 파이프로서 압력파이프(5’)는 배기가스의 최종 압력을 측정하기 위하여 CPF(2)의 후방과 연통하고, 압력파이프(5”)는 배기가스의 유입 압력을 측정하기 위하여 DOC(3)의 전방과 연통하고 있으며, 각 압력파이프(5‘,5“)의 타단은 도시하지 않은 압력측정기에 연결되어 있다. 그리고, 압력측정기에서 계산된 CPF(2)후방의 압력값(Pcpfo)과 DOC(3)의 전방의 압력값(Pdoci)의 차이는 ECU에 의하여 배기 가스의 통과량 및 적절함과 탄소 알갱이의 퇴적량등을 평가하는 정보로 활용된다.5 and 5 'are pressure pipes, and the pressure pipe 5' communicates with the rear of the CPF 2 to measure the final pressure of the exhaust gas, and the pressure pipe 5 '. Is in communication with the front of the DOC 3 to measure the inlet pressure of the exhaust gas, and the other ends of the pressure pipes 5 'and 5 &quot; are connected to a pressure gauge not shown. In addition, the difference between the pressure value Pcpfo at the rear of the CPF (2) and the pressure value Pdoci at the front of the DOC (3) calculated by the pressure gauge is determined by the ECU. It is used as information to evaluate quantity.

그런데 이러한 선행기술은 배기가스의 가장 처음 입구와 맨 나중의 압력 차이를 계산하는 절대 압력 방식으로 압력을 측정하고 있으므로, CPF(2)에서 발생하는 숯 검댕의 실제 포집 상황을 정확히 계측하기 어렵다는 단점이 있다. 또, 숯 검댕의 퇴적량이 증대되어 규정 이상의 차압이 검출되었으나 정확한 재생 제어가 안 되어 촉매가 막히거나 지나친 배압의 증가로 엔진 스톨(stall)현상이 발생하여도 이를 방지하는 적절한 기구가 없다는 단점이 있었다. However, since the prior art measures pressure in an absolute pressure method that calculates the difference in pressure between the first inlet and the last of the exhaust gas, it is difficult to accurately measure the actual collection situation of charcoal soot generated in the CPF (2). have. In addition, the differential pressure of charcoal soot was increased due to an increase in the amount of char soot, but there was a disadvantage that there was no proper mechanism to prevent the engine stall phenomenon due to the blockage of the catalyst or the increase of the back pressure due to inaccurate regeneration control. .

그러므로, 본 발명은 자동차 디젤 엔진의 DPF필터에 있어 압력 모니터링을 정확히 할 수 있고, 엔진 스톨 현상을 방지하도록 개량된 압력조절기구를 가진 자동차의 DPF필터 구조를 제공하는 것을 목적으로 한다.Therefore, an object of the present invention is to provide a DPF filter structure of an automobile having a pressure regulating mechanism that can accurately monitor pressure in a DPF filter of an automobile diesel engine and prevent an engine stall phenomenon.

상술한 목적을 달성하기 위한 본 발명의, 스틸하우징에 DOC및 CPF구간을 차례로 설치하여 자동차의 배기가스가 필터링 되도록 한 자동차 배기가스용의 DPF필터는 상기 DOC의 입구 압력을 측정하는 압력파이프와 상기 CPF의 출구 압력을 측정하는 압력파이프에 추가하여 상기 CPF의 입구 압력을 측정하는 압력파이프를 더 설치한 것을 특징으로 하고 있다.In order to achieve the above object, a DPF filter for automobile exhaust gas, in which steel exhaust gases are filtered by sequentially installing DOC and CPF sections in a steel housing, includes a pressure pipe for measuring inlet pressure of the DOC. A pressure pipe for measuring the inlet pressure of the CPF is further provided in addition to the pressure pipe for measuring the outlet pressure of the CPF.

또한 본 발명의, 스틸하우징에 DOC및 CPF구간을 차례로 설치하여 자동차의 배기가스가 필터링 되도록 한 자동차 배기가스용의 DPF필터는 상기 CPF의 전후로 스틸하우징에 연결된 바이패스관을 더 설치하고, 상기 바이패스관에 바이패스밸브를 설치하여, 상기 DOC의 입구 압력을 측정하는 압력파이프와 상기 CPF의 출구 압력을 측정하는 압력파이프에서 각각 측정된 압력값의 차가 엔진 스톨을 가져오는 소정값 이상인 경우 상기 바이패스밸브를 개방하도록 한 것을 특징으로 하고 있다.In addition, the DPF filter for automobile exhaust gas in which the exhaust gas of the automobile is filtered by sequentially installing DOC and CPF sections in the steel housing of the present invention, further installs a bypass pipe connected to the steel housing before and after the CPF, By-pass valves are installed in the pass pipes, and when the difference between the pressure values measured in the pressure pipe measuring the inlet pressure of the DOC and the pressure pipe measuring the outlet pressure of the CPF is more than a predetermined value that brings the engine stall, the bypass It is characterized by opening a pass valve.

이하, 본 발명의 바람직한 실시예를 첨부 도면을 참조로 설명한다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

도4는 본 발명의 압력조절기구를 가진 자동차의 DPF필터(1) 구조에 있어, 숯 검댕의 포집 상황을 보다 정확히 계측하기 위한 구성을 도시한 도면이다. 4 is a view showing a configuration for more accurately measuring the collection state of charcoal soot in the structure of the DPF filter 1 of a vehicle having a pressure regulating mechanism of the present invention.

본 발명의 DPF필터(1)는 종래의 압력파이프(5‘,5“)에 첨가하여 CPF(2)의 입구 부분과 연통된 압력파이프(5)를 설치한 점에 특징이 있다. 압력파이프(5)는 CPF(2)의 입구를 통과하는 배기 가스의 압력을 전송하며 압력측정기는 CPF(2)의 입구에서의 압력값(Pcpfi)을 검출한다. 그러므로, 이러한 본 발명에 의하면, 압력파이프(5’)를 통한 압력값(Pcpfo)과 압력파이프(5)를 통한 압력값(Pcpfi)의 차이를 계산함으로써 CPF(2)에서 발생하는 숯 검댕의 실제 포집 상황을 정확히 계측할 수 있다. 이러한 본 발명의 압력 측정 방식은 CPF(2)전후의 상대 압력을 계측하여, 숯 검댕과 비교적 관련이 없는 DOC(3)의 영향을 배제하는 것이므로 정확한 계측의 담보가 가능함을 알 수 있다.The DPF filter 1 of the present invention is characterized in that a pressure pipe 5 is provided in communication with an inlet portion of the CPF 2 in addition to a conventional pressure pipe 5 ', 5'. The pressure pipe 5 transmits the pressure of the exhaust gas passing through the inlet of the CPF 2 and the pressure gauge detects the pressure value Pcpfi at the inlet of the CPF 2. Therefore, according to the present invention, the actual charcoal soot generated in the CPF 2 by calculating the difference between the pressure value Pcpfo through the pressure pipe 5 'and the pressure value Pcpfi through the pressure pipe 5 is obtained. Accurately measure the collection situation. This pressure measurement method of the present invention by measuring the relative pressure before and after the CPF (2), to exclude the influence of DOC (3) relatively unrelated to charcoal soot, it can be seen that it is possible to ensure accurate measurement.

그런데, 엔진 스톨이나 이상 현상 발생의 감지를 위해서는 압력값(Pcpfi)은 큰 의미가 없으므로 선행기술과 같이 압력값(Pcpfo)과 압력값(Pdoci)의 차이를 모니터링 하는 것이 필요하다. 특히 상대적으로 짧은 시간에 많은 량의 숯 검댕이 발생하여 CPF(2)차압이 그리 큰 차이가 없는 상황에서는 엔진 스톨이나 이상 현상이 발생하기 전에 배기압력을 충분히 모니터링 하는 것이 필요하다. 그러므로, 본 발명에서는 선행기술의 압력 모니터링 방식을 병행하는 것이 바람직하다.However, in order to detect an engine stall or an abnormal phenomenon, the pressure value Pcpfi does not have much meaning, and thus, it is necessary to monitor the difference between the pressure value Pcpfo and the pressure value Pdoci as in the prior art. Especially in a situation where a large amount of char soot occurs in a relatively short time and there is no significant difference in the CPF (2) differential pressure, it is necessary to sufficiently monitor the exhaust pressure before an engine stall or an abnormal phenomenon occurs. Therefore, in the present invention, it is preferable to use the prior art pressure monitoring system.

도5는 본 발명의 압력조절기구를 가진 자동차의 DPF필터(1) 구조에 있어, 지나친 배압 증가로 인한 엔진 스톨 현상을 방지하기 위해 바이패스 밸브를 설치한 구성을 도시한 도면이다.FIG. 5 is a diagram illustrating a configuration in which a bypass valve is installed to prevent an engine stall phenomenon due to excessive back pressure increase in a DPF filter 1 structure of a vehicle having a pressure regulating mechanism according to the present invention.

이러한 본 발명에서는 CPF(2)를 전후한 지점에 연통하여 스틸하우징(4)에 연결된 바이패스관(12)을 설치하고, 이 바이패스관(12)의 적당한 개소에 바이패스밸브(10)를 설치하고 있다.In the present invention, the bypass pipe 12 connected to the steel housing 4 is provided in communication with the point before and after the CPF 2, and the bypass valve 10 is provided at a suitable location of the bypass pipe 12. I install it.

도6a 및 도6b의 확대도에 도시한 것과 같이 바이패스밸브(10)는 차폐벽(14)과, 다공질의 투과벽(14‘) 및 이들 벽(14,14’)사이에 배치된 볼(16) 및 스프링과 같은 탄성부재(18)를 포함한다. 이러한 바이패스밸브(10)는 배기가스의 압력이 낮을 때는 도6a에 도시한 것과 같이 탄성부재(18)의 가압으로 볼(16)이 차폐벽(14)을 차단하여 배기가스가 바이패스관(12)을 흐르지 못하지만, 배기가스의 압력이 높을 때는 도6b에 도시한 것과 같이 볼(16)이 탄성부재(18)를 우측으로 가압하여 이동함으로써 배기가스가 차폐벽(14)의 틈새로 유입되어 투과벽(14‘)을 통해 바이패스관(12)으로 흐름으로써 배기가스가 CPF(2)를 통과하지 않고 외부로 배출되도록 하고 있다. 이 경우 자동차의 엔진은 림-홈 모드(rim-home mode)로 전환되도록 하여 배기 가스 규제에 저촉되지 않도록 일정량 이하의 배기가 되도록 하는 것이 바람직하다. 탄성부재의 스프링 계수는 엔진 스톨이 발생하는 배기가스의 압력을 고려하여 이 압력을 초과할 때 볼에 의해 가압되도록 설계될 필요가 있다.As shown in the enlarged views of FIGS. 6A and 6B, the bypass valve 10 includes a shield wall 14, a porous permeable wall 14 ′, and a ball disposed between these walls 14, 14 ′. 16) and an elastic member 18 such as a spring. When the pressure of the exhaust gas is low, the bypass valve 10 blocks the shielding wall 14 by the pressure of the elastic member 18, as shown in FIG. 6A, so that the exhaust gas is bypassed. 12), but when the pressure of the exhaust gas is high, as shown in FIG. 6B, the ball 16 presses and moves the elastic member 18 to the right, whereby the exhaust gas flows into the gap of the shielding wall 14. By passing through the permeation wall 14 'to the bypass pipe 12, exhaust gas is discharged to the outside without passing through the CPF 2. In this case, it is preferable that the engine of the vehicle is switched to the rim-home mode so that the exhaust of a certain amount or less does not violate the exhaust gas regulation. The spring coefficient of the elastic member needs to be designed to be pressurized by the ball when exceeding this pressure in consideration of the pressure of the exhaust gas generated by the engine stall.

또, 이상 기술한 본 발명의 바이패스 밸브는 주지의 솔레노이드 밸브를 이용하여 압력값(Pcpfo)과 압력값(Pdoci)의 차이를 모니터링 한 결과 엔진의 스톨을 유발하는 소정값 이상이면 상기 밸브를 개방함으로써 배기가스의 흐름을 자동 조절하는 방식의 채용도 가능하다. In addition, the bypass valve of the present invention described above uses the well-known solenoid valve to open the valve when the difference between the pressure value Pcpfo and the pressure value Pdoci is greater than a predetermined value causing the engine to stall. It is also possible to employ a method of automatically adjusting the flow of exhaust gas.

이상 기술한 본 발명은 자동차 디젤 엔진의 DPF필터에 있어 숯 검댕에 대한 압력 모니터링을 정확히 할 수 있고, 엔진 스톨 현상을 방지하며, 효율적으로 엔진을 제어한다는 우월한 효과를 발휘한다.The present invention described above has the superior effect of accurately monitoring the pressure of charcoal soot in the DPF filter of the automobile diesel engine, preventing the engine stall phenomenon, and effectively controlling the engine.

Claims (2)

삭제delete 스틸하우징에 DOC및 CPF구간을 차례로 설치하여 자동차의 배기가스가 필터링 되도록 한 자동차 배기가스용의 DPF필터로서, 상기 필터는 상기 CPF의 전후로 스틸하우징에 연결된 바이패스관을 더 설치하고, 상기 바이패스관에 바이패스밸브를 설치하여, 상기 DOC의 입구 압력을 측정하는 압력파이프와 상기 CPF의 출구 압력을 측정하는 압력파이프에서 각각 측정된 압력값의 차가 엔진 스톨을 가져오는 소정값 이상인 경우 상기 바이패스밸브를 개방하도록 하되, 상기 바이패스밸브는 차폐벽과, 다공질의 투과벽과, 상기 차폐벽과 투과벽 사이에 배치된 볼 및 탄성부재를 포함하는 것을 특징으로 하는 자동차의 DPF필터 구조.A DPF filter for automobile exhaust gas in which steel exhaust gases are filtered by sequentially installing DOC and CPF sections in a steel housing, wherein the filter further includes a bypass pipe connected to the steel housing before and after the CPF, and the bypass. By-pass valve is installed in the pipe, the bypass when the difference between the pressure value measured in each of the pressure pipe for measuring the inlet pressure of the DOC and the pressure pipe for measuring the outlet pressure of the CPF is more than a predetermined value to bring the engine stall Wherein the bypass valve includes a shielding wall, a porous permeable wall, a ball and an elastic member disposed between the shielding wall and the permeable wall.
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