KR20160069394A - Method for controlling exhaust gas recirculation valve - Google Patents

Method for controlling exhaust gas recirculation valve Download PDF

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KR20160069394A
KR20160069394A KR1020140175307A KR20140175307A KR20160069394A KR 20160069394 A KR20160069394 A KR 20160069394A KR 1020140175307 A KR1020140175307 A KR 1020140175307A KR 20140175307 A KR20140175307 A KR 20140175307A KR 20160069394 A KR20160069394 A KR 20160069394A
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exhaust gas
gas recirculation
recirculation valve
constant
controlling
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KR1020140175307A
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Korean (ko)
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KR102075134B1 (en
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김종완
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현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • F02D2021/083—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine controlling exhaust gas recirculation electronically
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

According to the present invention, a method to control an exhaust gas recirculation valve may comprise: a step of calculating a determination constant based on a number of engine rotation and pressure difference between a front end and a rear end of an exhaust gas recirculation valve when turning on an exhaust brake; a step of determining whether the calculated determination constant is greater than a predetermined constant; and a step of controlling an opening of the exhaust gas recirculation valve when the determination constant is greater than the predetermined constant as a result of performing the determination step.

Description

배기가스 재순환 밸브의 제어방법 {METHOD FOR CONTROLLING EXHAUST GAS RECIRCULATION VALVE}TECHNICAL FIELD [0001] The present invention relates to an exhaust gas recirculation valve,

본 발명은 엔진 회전수와 배기가스 재순환 밸브의 전후단 압력차에 따라 배기가스 재순환밸브의 개도를 제어방법에 관한 것이다.
The present invention relates to a method of controlling the opening degree of an exhaust gas recirculation valve in accordance with the engine speed and the difference in pressure across the exhaust gas recirculation valve.

최근 디젤엔진을 구비한 차량의 연비를 향상시키고 배기가스를 저감하기 위하여 배기가스 재순환(EGR: Exhaust Gas Recirculation)장치를 적용하는 추세이다.Recently, exhaust gas recirculation (EGR) apparatuses have been applied to improve the fuel efficiency of a vehicle equipped with a diesel engine and to reduce exhaust gas.

예를 들어, 차량 주행시 배기 브레이크가 동작하면 배기 브레이크 내부의 버터플라이밸브를 닫는다. 이때, 엔진과 배기가스 재순환 밸브부의 배압이 증가하면서 차량이 감속하게 된다. 이렇게 엔진에 배압이 증가하다가 엔진배압으로 인해 배기가스 재순환밸브에 일정 압력 이상이 작용될 경우 배기가스 재순환 밸브를 열어 엔진 배압이 과다하게 형성되는 것을 방지한다.For example, if the exhaust brake operates when the vehicle is running, the butterfly valve inside the exhaust brake is closed. At this time, the backpressure of the engine and the exhaust gas recirculation valve portion increases, and the vehicle decelerates. When the back pressure increases in the engine and the engine back pressure causes the exhaust gas recirculation valve to operate over a certain pressure, the exhaust gas recirculation valve is opened to prevent the engine back pressure from being excessively formed.

하지만, 이러한 제어로직은 엔진 배압으로만 국한되어 있어 배기브레이크 작동 시 배기가스 재순환 밸브에 엔진 배압이 과다하게 형성되어 배기가스 재순환 밸브의 내구성 부족으로 파손이 발생하거나 엔진 허용배압이 너무 낮아 배기브레이크 성능 부족현상이 발생할 수 있다는 문제점이 있다.However, since the control logic is limited to the engine back pressure, the engine back pressure is excessively formed in the exhaust gas recirculation valve during the exhaust brake operation, so that the exhaust gas recirculation valve may be damaged due to lack of durability or the engine back pressure is too low, There is a problem that shortage may occur.

상기의 배경기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.
It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KR 10-1028233 B1KR 10-1028233 B1

본 발명은 이러한 문제점을 해결하기 위하여 제안된 것으로, 엔진 회전수 및 배기가스 재순환 밸브 전후단의 압력차에 기반하여 배기가스 재순환 밸브의 개도를 제어하는 배기가스 재순환 밸브의 제어방법을 제공하는데 그 목적이 있다.
SUMMARY OF THE INVENTION The present invention has been proposed in order to solve these problems and provides a control method of an exhaust gas recirculation valve for controlling the opening degree of an exhaust gas recirculation valve based on the engine speed and the pressure difference between the upstream and downstream ends of the exhaust gas recirculation valve .

상기의 목적을 달성하기 위한 본 발명에 따른 배기가스 재순환 밸브의 제어방법은 배기브레이크 온(ON) 시, 엔진 회전수 및 배기가스 재순환 밸브 전후단의 압력차에 기반하여 판단상수를 산출하는 단계; 상기 산출된 판단상수가 기설정된 상수보다 큰지 판단하는 단계; 및 상기 판단하는 단계 수행결과, 판단상수가 기설정된 상수보다 큰 경우 배기가스 재순환 밸브의 개도를 제어하는 단계;를 포함할 수 있다.In order to achieve the above object, a control method for an exhaust gas recirculation valve according to the present invention comprises the steps of: calculating a judgment constant based on an engine revolution speed and a pressure difference between an exhaust gas recirculation valve and an exhaust gas recirculation valve; Determining whether the calculated decision constant is greater than a predetermined constant; And controlling the opening degree of the exhaust gas recirculation valve when the determination constant is greater than a predetermined constant as a result of the determining step.

상기 판단상수는 엔진 회전수가 감소할수록 증가하고, 상기 배기가스 재순환 밸브 전후단의 압력차가 커질수록 증가하는 것을 특징으로 할 수 있다.The determination constant increases as the number of revolutions of the engine decreases and increases as the pressure difference between the upstream and downstream ends of the exhaust gas recirculation valve increases.

상기 제어하는 단계는 상기 판단상수가 클수록 상기 배기가스 재순환 밸브의 개도를 증가시키는 것을 특징으로 할 수 있다.And the controlling step increases the opening degree of the exhaust gas recirculation valve as the determination constant increases.

상기 제어하는 단계는 기설정된 시간동안 배기가스 재순환 밸브의 개도를 제어하는 것을 특징으로 할 수 있다.And the controlling step may control the opening degree of the exhaust gas recirculation valve for a predetermined period of time.

상기 기설정된 시간은 상기 판단상수가 클수록 길어지는 것을 특징으로 할 수 있다.
The predetermined time may be longer as the determination constant is larger.

상술한 바와 같은 구조로 이루어진 배기가스 재순환 밸브의 제어방법에 따르면 엔진 회전수 및 배기가스 재순환 밸브 전후단의 압력차에 기반하여 배기가스 재순환 밸브의 개도를 제어함으로써 배기브레이크 작동시 배기가스 재순환 밸브에 배압을 자동적으로 제어하여 배기가스 재순환 밸브 내구성을 향상시킬 수 있다.
According to the control method of the exhaust gas recirculation valve having the above-described structure, by controlling the opening degree of the exhaust gas recirculation valve based on the engine speed and the pressure difference between the upstream and downstream sides of the exhaust gas recirculation valve, the exhaust gas recirculation valve The back pressure can be automatically controlled to improve the durability of the exhaust gas recirculation valve.

도 1은 본 발명의 일 실시예에 따른 배기가스 재순환 밸브의 제어장치를 도시한 도면이다.
도 2는 본 발명의 일 실시예에 따른 배기가스 재순환 밸브의 제어방법을 도시한 도면이다.FIG. 1 is a view showing an apparatus for controlling an exhaust gas recirculation valve according to an embodiment of the present invention.
2 is a view illustrating a control method of an exhaust gas recirculation valve according to an embodiment of the present invention.

이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예에 따른 배기가스 재순환밸브의 제어장치에 대하여 살펴본다.Hereinafter, a control system for an exhaust gas recirculation valve according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 배기가스 재순환밸브의 제어장치를 도시한 도면이다. 도 1을 참조하면 배기가스 재순환 밸브의 제어장치는 흡기 매니폴드(11) 및 배기 매니폴드(12)를 포함하는 엔진(10); 상기 배기 매니폴드(12)로부터 배출된 배기가스가 EGR(Exhaust Gas Recirculation)쿨러(14)를 거쳐 흡기 매니폴드(11)로 재유입되도록 개도를 조절하는 배기가스 재순환 밸브(13); 상기 배기 매니폴드(12)로부터 배출된 배기가스가 외부로 배기되는 것을 조절하는 배기브레이크 밸브(15); 및 상기 엔진(10)의 회전수와 배기가스 재순환 밸브(13) 전후단의 압력차를 기반으로 배기가스 재순환 밸브(13)의 개도를 제어하는 제어부(16)를 포함할 수 있다.FIG. 1 is a view showing an apparatus for controlling an exhaust gas recirculation valve according to an embodiment of the present invention. 1, an apparatus for controlling an exhaust gas recirculation valve includes an engine 10 including an intake manifold 11 and an exhaust manifold 12; An exhaust gas recirculation valve 13 for regulating the opening of exhaust gas discharged from the exhaust manifold 12 through the EGR (Exhaust Gas Recirculation) cooler 14 to be reintroduced into the intake manifold 11; An exhaust brake valve (15) for regulating exhaust gas exhausted from the exhaust manifold (12) to be exhausted to the outside; And a control unit 16 for controlling the opening degree of the exhaust gas recirculation valve 13 based on the rotational speed of the engine 10 and the pressure difference between the exhaust gas recirculation valve 13 and the exhaust gas recirculation valve 13.

배기 매니폴드(12)는 배기가스 재순환 밸브(13), 배기브레이크 밸브(15) 및 터보차저(17)와 연결되도록 마련된 것을 특징으로 할 수 있다.
The exhaust manifold 12 is connected to the exhaust gas recirculation valve 13, the exhaust brake valve 15, and the turbocharger 17.

이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예에 따른 배기가스 재순환 밸브의 제어방법에 대하여 살펴본다.Hereinafter, a control method of an exhaust gas recirculation valve according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명의 일 실시예에 따른 배기가스 재순환 밸브의 제어방법을 도시한 도면이다. 도 2를 참조하면 배기가스 재순환 밸브의 제어방법은 배기브레이크 온(ON) 시, 엔진(10) 회전수 및 배기가스 재순환 밸브(13) 전후단의 압력차에 기반하여 판단상수를 산출하는 단계(S200); 상기 산출된 판단상수가 기설정된 상수보다 큰지 판단하는 단계(S210); 및 상기 판단하는 단계(S210) 수행결과, 판단상수가 기설정된 상수보다 큰 경우 배기가스 재순환 밸브(13)의 개도를 제어하는 단계;를 포함할 수 있다.2 is a view illustrating a control method of an exhaust gas recirculation valve according to an embodiment of the present invention. Referring to FIG. 2, the control method of the exhaust gas recirculation valve includes calculating a judgment constant based on the rotational speed of the engine 10 and the pressure difference between the exhaust gas recirculation valve 13 and the exhaust gas recirculation valve 13 at the time of exhaust brake ON S200); Determining whether the calculated judgment constant is greater than a preset constant (S210); And controlling the opening degree of the exhaust gas recirculation valve (13) when the determination constant is greater than a predetermined constant as a result of the determining step (S210).

배기 브레이크가 온(ON)되면 배기 브레이크 밸브(15)는 닫힘(Close)동작을 수행하고 이에 따라 배기 매니폴드(12)로부터 배출된 배기가스가 압축된다. 이는 엔진(10)의 피스톤 상하 운동에 저항하는 압력을 급속히 발생시키는 것으로, 엔진 브레이크에 비하여 빠르고 큰 제동력을 얻을 수 있다.When the exhaust brake is turned ON, the exhaust brake valve 15 performs a closing operation, so that the exhaust gas discharged from the exhaust manifold 12 is compressed. This rapidly generates a pressure against the up-and-down movement of the piston of the engine 10, so that a quick and large braking force can be obtained as compared with the engine brake.

배기 브레이크 밸브(15)가 닫힘(Close)동작하면 엔진(10) 배압으로 인해 차량의 속도와 엔진(10)의 회전수가 감소하게 되는데, 배기가스 재순환 밸브(13) 개도 조절을 엔진 회전수에 기반하여 조절함으로써 배기브레이크의 성능을 최적화할 수 있다. 예를 들어, 엔진 회전수가 너무 높으면 엔진 배압이 낮아 배기브레이크 성능 저하된다고 판단하여 배기가스 재순환 밸브(13)의 개도를 감소시켜 엔진배압을 증가시킨다. 반대로 엔진 회전수가 너무 낮으면 배기가스 재순환 밸브(13)에 압력이 과도하게 작용하는 것으로 판단하여 배기가스 재순환 밸브(13)의 개도를 증가시켜 엔진 배압을 줄인다.When the exhaust brake valve 15 is closed, the speed of the vehicle and the number of revolutions of the engine 10 are reduced due to the back pressure of the engine 10. The opening degree of the exhaust gas recirculation valve 13 is adjusted based on the engine speed The performance of the exhaust brake can be optimized. For example, when the engine speed is too high, it is determined that the engine back pressure is low and the performance of the exhaust brake is deteriorated, thereby reducing the opening degree of the exhaust gas recirculation valve 13 to increase the engine back pressure. Conversely, when the engine speed is too low, it is determined that the exhaust gas recirculation valve 13 is excessively pressurized, and the opening degree of the exhaust gas recirculation valve 13 is increased to reduce the engine back pressure.

또한, 배기 브레이크 밸브(15)가 닫힘(Close)동작하면 엔진(10) 배압으로 인해 배기가스 재순환 밸브(13) 전후단의 압력차가 증가하게 되는데, 상기 압력차에 따라 배기가스 재순환 밸브(13)의 개도를 조절함으로써 배기가스 재순환 밸브(13)의 파손을 방지할 수 있다. 예를 들어, 배기가스 재순환 밸브(130)의 전후단 압력차가 너무 작으면 배기가스 재순환 밸브(13)의 개도를 감소시켜 엔진배압을 증가시킨다. 반대로 압력차가 너무 크면 배기가스 재순환 밸브(13)의 손상이 우려된다고 판단하여 배기가스 재순환 밸브(13)의 개도를 증가시킨다.When the exhaust brake valve 15 is closed, the pressure difference between the exhaust gas recirculation valve 13 and the exhaust gas recirculation valve 13 increases due to the back pressure of the engine 10. The exhaust gas recirculation valve 13, It is possible to prevent the exhaust gas recirculation valve 13 from being damaged. For example, if the pressure difference between the upstream and downstream sides of the exhaust gas recirculation valve 130 is too small, the opening degree of the exhaust gas recirculation valve 13 is reduced to increase the engine back pressure. On the contrary, if the pressure difference is too large, it is determined that the exhaust gas recirculation valve 13 is damaged and the opening degree of the exhaust gas recirculation valve 13 is increased.

본 발명은 엔진회전수와 배기가스 재순환 밸브(13)의 전후단 압력차를 판단상수로 정의하여 산출하고, 산출된 판단상수를 이용하여 배기가스 재순환 밸브(13)의 개도를 제어함으로써 배기브레이크의 성능과 배기가스 재순환 밸브(13)의 내구성을 향상시키는 제어를 구현할 수 있다. 종합적으로, 판단상수는 엔진 회전수가 감소할수록 증가하고, 상기 배기가스 재순환 밸브(13) 전후단의 압력차가 커질수록 증가하는 것을 특징으로 할 수 있다.In the present invention, the engine speed and the difference between the front and rear pressures of the exhaust gas recirculation valve 13 are defined as a judgment constant, and the opening degree of the exhaust gas recirculation valve 13 is controlled by using the calculated judgment constant, The performance and the control for improving the durability of the exhaust gas recirculation valve 13 can be realized. In general, the judgment constant increases as the number of revolutions of the engine decreases, and increases as the pressure difference between the front and rear ends of the exhaust gas recirculation valve 13 increases.

만약, 판단하는 단계(S220) 수행결과, 판단상수가 기설정된 상수보다 작은 경우에는 배기가스 재순환 밸브(13)를 닫음(Close)으로써 엔진 배압을 증가시키는 제어를 수행할 수 있다. 여기서 기설정된 상수는 설계자에 의해 가변 설정될 수 있다. If it is determined in step S220 that the determination constant is smaller than a predetermined constant, the exhaust gas recirculation valve 13 may be closed to increase the engine back pressure. Here, the predetermined constant can be variably set by the designer.

상기 제어하는 단계(S230)는 상기 판단상수가 클수록 상기 배기가스 재순환 밸브(13)의 개도를 증가시키는 것을 특징으로 할 수 있다.
The controlling step S230 may increase the opening degree of the exhaust gas recirculation valve 13 as the determination constant increases.

한편, 상기 제어하는 단계(S230)는 기설정된 시간동안 배기가스 재순환 밸브(13)의 개도를 제어하는 것을 특징으로 할 수 있다. 이때, 기설정된 시간은 상기 판단상수가 클수록 길어지는 것을 특징으로 할 수 있다.Meanwhile, the controlling step S230 may control the opening degree of the exhaust gas recirculation valve 13 for a predetermined time. At this time, the preset time may be longer as the judgment constant is larger.

즉, 본 발명은 기설정된 시간동안 배기가스 재순환 밸브(13)가 개도를 유지하도록 제어하고 다시 판단상수를 산출하는 단계(S210)를 수행함으로써 주기적으로 배기가스 재순환 밸브(13)의 개도를 조절할 수 있다. 또한, 기설정된 시간을 엔진 회전수와 배기가스 재순환 밸브(13)의 전후단 압력차에 기반한 판단상수를 이용하여 가변조절함으로써 제어효율을 더욱 향상시킬 수 있다.That is, the present invention controls the opening degree of the exhaust gas recirculation valve 13 periodically by controlling the exhaust gas recirculation valve 13 to maintain the opening degree for a predetermined time and calculating the judgment constant again (S210) have. Further, the control time can be further improved by varying the preset time by using a judgment constant based on the engine speed and the pressure difference between the front and rear ends of the exhaust gas recirculation valve 13.

예를 들어, 판단상수가 크면 배기가스 재순환 밸브(13) 측에 과도한 압력이 형성된다고 판단하여 배기가스 재순환 밸브(13)의 개도를 증가시키고 개도가 유지되는 시간도 증가시켜 효율적으로 엔진 배압을 줄일 수 있다. 반대로, 판단상수가 작으면 배기브레이크의 성능이 낮아진다고 판단하여 배기가스 재순환 밸브(13)의 개도를 감소시키고 개도가 유지되는 시간도 감소시킴으로서 빠르게 판단상수를 산출하도록 제어할 수 있다.
For example, if the judgment constant is large, it is judged that excessive pressure is formed on the exhaust gas recirculation valve 13 side, so that the opening degree of the exhaust gas recirculation valve 13 is increased and the time during which the opening degree is maintained is also increased, . On the contrary, if the judgment constant is small, it is determined that the performance of the exhaust brake is lowered, so that the opening degree of the exhaust gas recirculation valve 13 is reduced and the time for which the opening degree is maintained is also reduced.

상술한 바와 같은 구조로 이루어진 배기가스 재순환 밸브의 제어방법에 따르면 엔진 회전수 및 배기가스 재순환 밸브 전후단의 압력차에 기반하여 배기가스 재순환 밸브의 개도를 제어함으로써 배기브레이크 작동시 배기가스 재순환 밸브에 배압을 자동적으로 제어하여 배기가스 재순환 밸브 내구성을 향상시킬 수 있다.
According to the control method of the exhaust gas recirculation valve having the above-described structure, by controlling the opening degree of the exhaust gas recirculation valve based on the engine speed and the pressure difference between the upstream and downstream sides of the exhaust gas recirculation valve, the exhaust gas recirculation valve The back pressure can be automatically controlled to improve the durability of the exhaust gas recirculation valve.

본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 기술적 사상을 벗어나지 않는 한도 내에서, 본 발명이 다양하게 개량 및 변화될 수 있다는 것은 당 업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.
While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10: 엔진 11: 흡기 매니폴드
12: 배기 매니폴드 13: 배기가스 재순환 밸브
14: 배기가스 재순환 쿨러 15: 배기브레이크 밸브
16: 제어부 17: 터보차저10: engine 11: intake manifold
12: exhaust manifold 13: exhaust gas recirculation valve
14: Exhaust gas recirculation cooler 15: Exhaust brake valve
16: control unit 17: turbocharger

Claims (5)

배기브레이크 온(ON) 시, 엔진 회전수 및 배기가스 재순환 밸브 전후단의 압력차에 기반하여 판단상수를 산출하는 단계;
상기 산출된 판단상수가 기설정된 상수보다 큰지 판단하는 단계; 및
상기 판단하는 단계 수행결과, 판단상수가 기설정된 상수보다 큰 경우 배기가스 재순환 밸브의 개도를 제어하는 단계;를 포함하는,
배기가스 재순환 밸브의 제어방법.Calculating a judgment constant based on the engine speed and the pressure difference between the exhaust gas recirculation valve and the exhaust gas recirculation valve at the time of exhaust brake ON;
Determining whether the calculated decision constant is greater than a predetermined constant; And
And controlling the opening degree of the exhaust gas recirculation valve when the determination constant is greater than a predetermined constant as a result of the determining step.
A method for controlling an exhaust gas recirculation valve. 제1항에 있어서,
상기 판단상수는 엔진 회전수가 감소할수록 증가하고, 상기 배기가스 재순환 밸브 전후단의 압력차가 커질수록 증가하는 것을 특징으로 하는,
배기가스 재순환 밸브의 제어방법. The method according to claim 1,
Wherein the judgment constant is increased as the number of revolutions of the engine decreases and increases as the pressure difference between the upstream and downstream ends of the exhaust gas recirculation valve increases.
A method for controlling an exhaust gas recirculation valve. 제1항에 있어서,
상기 제어하는 단계는 상기 판단상수가 클수록 상기 배기가스 재순환 밸브의 개도를 증가시키는 것을 특징으로 하는,
배기가스 재순환 밸브의 제어방법.The method according to claim 1,
Wherein the controlling step increases the opening degree of the exhaust gas recirculation valve as the determination constant increases.
A method for controlling an exhaust gas recirculation valve. 제1항에 있어서,
상기 제어하는 단계는 기설정된 시간동안 배기가스 재순환 밸브의 개도를 제어하는 것을 특징으로 하는,
배기가스 재순환 밸브의 제어방법.The method according to claim 1,
Characterized in that said controlling step controls the opening of the exhaust gas recirculation valve for a predetermined period of time.
A method for controlling an exhaust gas recirculation valve. 제4항에 있어서,
상기 기설정된 시간은 상기 판단상수가 클수록 길어지는 것을 특징으로 하는,
배기가스 재순환밸브의 제어방법.5. The method of claim 4,
Wherein the predetermined time is longer as the judgment constant is larger.
A method for controlling an exhaust gas recirculation valve.
KR1020140175307A 2014-12-08 2014-12-08 Method for controlling exhaust gas recirculation valve KR102075134B1 (en)

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