KR970001934B1 - Exhaust gas purifying apparatus & controlling method of a car - Google Patents

Exhaust gas purifying apparatus & controlling method of a car

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Publication number
KR970001934B1
KR970001934B1 KR1019950010755A KR19950010755A KR970001934B1 KR 970001934 B1 KR970001934 B1 KR 970001934B1 KR 1019950010755 A KR1019950010755 A KR 1019950010755A KR 19950010755 A KR19950010755 A KR 19950010755A KR 970001934 B1 KR970001934 B1 KR 970001934B1
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KR
South Korea
Prior art keywords
engine
ehc
exhaust gas
temperature sensor
intake air
Prior art date
Application number
KR1019950010755A
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Korean (ko)
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KR960041635A (en
Inventor
홍재희
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한승준
기아자동차주식회사
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Priority to KR1019950010755A priority Critical patent/KR970001934B1/en
Publication of KR960041635A publication Critical patent/KR960041635A/en
Application granted granted Critical
Publication of KR970001934B1 publication Critical patent/KR970001934B1/en

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Classifications

    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • 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
    • 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)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A filtering apparatus of car exhausted gas and control method thereof having: a cooling water temperature sensor(21) sensing the temperature of the cooling water; a suction air temperature sensor(22) sensing the suction air of an engine(5); an electric heated catalyst(ECH ; 50) forcibly elevating the temperature of the gas exhausted from the engine; an engine control unit(ECU; 30) determining the operating time of the electric heated catalyst(50) according to the outputs of the sensors(21,22), and connected to a key switch(23) to sense the ignition state of a car; and a timer(40) operating of the electric heated catalyst(50) according to the determined operating time; is disclosed.

Description

자동차의 배기가스 정화장치와 그 제어방법Vehicle exhaust gas purification device and control method

제1도는 종래의 배기가스 정화장치를 나타낸 사시도.1 is a perspective view showing a conventional exhaust gas purification device.

제2도는 본 발명에 따른 배기가스 정화장치의 제어블록도.2 is a control block diagram of an exhaust gas purifying apparatus according to the present invention.

제3도는 본 발명에 따른 배기가스 정화장치의 동작순서도.3 is a flow chart of the operation of the exhaust gas purifying apparatus according to the present invention.

제4a도는 시동시 흡입공기온도에 따른 배기가스 정화장치 동작시간을 나타낸 그래프.Figure 4a is a graph showing the operation time of the exhaust gas purifying device according to the intake air temperature at startup.

제4b도는 시동시 냉각수온도에 따른 배기가스 정화장치 동작시간을 나타낸 그래프.Figure 4b is a graph showing the operation time of the exhaust gas purifier according to the coolant temperature at startup.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 시일딩 장치 11 : 촉매컨버터10: sealing device 11: catalytic converter

21 : 냉각수온센서 22 : 흡기온센서21: cooling water temperature sensor 22: intake air temperature sensor

23 : 키스위치 30 : ECU(Engine Control Unit)23: key switch 30: ECU (Engine Control Unit)

40 : 타이머 50 : EHC(Electric Heated Catalist)40: Timer 50: EHC (Electric Heated Catalist)

본 발명은 자동차 배기가스 정화장치에 관한 것으로, 특히 가열기능을 가진 촉매의 제어기능을 부가하며, 제어판단 기준을 제공함으로서, 엔진의 온도에 따라 효율적으로 배기가스를 정화하는 자동차의 배기가스 정화장치와 그 제어방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile exhaust gas purification apparatus, and in particular, by adding a control function of a catalyst having a heating function and providing a control panel stage standard, the exhaust gas purification apparatus for automobiles that purifies exhaust gas efficiently according to the engine temperature. And a control method thereof.

일반적으로 배기가스 정화장치는 제1도에 나타낸 바와 같이, 엔진의 배기매니폴드로부터 연결된 배기계(10)에 엔진에서 발생한 배기가스의 온도를 높이기 위한 이에이취씨(EHC; Electric Heated Catalist)(50)와; 유해한 CO, HC, NOx를 무해한 CO2, H2O, N2로 산화 또는 환원시키는 촉매컨버터(11)로 구성되었다.In general, the exhaust gas purifying apparatus is shown in FIG. Wow; It was composed of a catalytic converter (11) for oxidizing or reducing harmful CO, HC, NOx to harmless CO 2 , H 2 O, N 2 .

이러한 종래 장치는 시동시에 발생하는 유해가스의 효과적인 정화를 위하여 EHC(50)에서 배기가스의 온도를 높혀, 촉매컨버터(11)에서 배기가스를 단순히 산화 또는 환원시키는 화학적인 반응만을 하였기 때문에, 시동후에 배기가스가 일정온도이상의 되어도 계속적으로 EHC(50)가 작동을 하므로, 전력이 계속해서 소모가 되는 결점이 있었다.Since the conventional apparatus raises the temperature of the exhaust gas in the EHC 50 for the effective purification of the harmful gas generated at the start, only the chemical reaction of simply oxidizing or reducing the exhaust gas in the catalytic converter 11 is performed. Since the EHC 50 continues to operate even after the exhaust gas is above a certain temperature, there is a drawback that the power continues to be consumed.

본 발명의 목적은 상기와 같은 종래의 결점을 해결하기 위한 것으로, 엔진의 시동상태를 파악하여 EHC의 제어기능을 부가하며, 그 제어판단 기준을 제공함으로서 EHC의 가열기능의 작동식단의 최적치로 효율적인 가열기능의 작용을 실행하여 소비전력을 저감시키는 자동차의 배기가스 정화장치와 그 제어방법을 제공하는데 있다.An object of the present invention is to solve the above-mentioned shortcomings, to grasp the starting state of the engine, to add the control function of the EHC, and to provide the control panel stage standard, thereby providing the optimum value of the operation type of the heating function of the EHC. The present invention provides an exhaust gas purification device for a vehicle and a control method thereof for reducing power consumption by performing a heating function.

이하 본 발명의 기술적 구성을 상세히 설명하면 다음과 같다.Hereinafter, the technical configuration of the present invention in detail.

냉각수 온도를 검출하는 냉각수온센서(21)와; 엔지(5)으로 흡입되는 흡입공기 온도를 검출하는 흡기온센서(22)와; 엔진에서 배출되는 배기가스의 온도를 강제적으로 상승시키는 EHC(Electric Heated Catalist)(50)와; 상기 냉각수온센서(21) 및 흡기온센서(22)의 출력에 따라 EHC(50)의 작동시간을 결정하고, 키스위치(23)와 접속되어 차량의 시동상태를 감지하는 ECU(Engine Control Unit)(30)와; 상기 ECU(30)에서 결정된 동작시간에 따라 EHC(50)의 동작하는 타이머(40)로 구성함을 그 기술적 구성상의 특징으로 한다.A cooling water temperature sensor 21 detecting a cooling water temperature; An intake air temperature sensor 22 for detecting intake air temperature sucked into the engine 5; EHC (Electric Heated Catalist) 50 forcibly raising the temperature of the exhaust gas discharged from the engine; An ECU (Engine Control Unit) which determines an operating time of the EHC 50 according to the output of the cooling water temperature sensor 21 and the intake air temperature sensor 22, and is connected to the key switch 23 to sense the starting state of the vehicle. 30; The technical configuration is characterized by the configuration of the timer 40 to operate the EHC 50 in accordance with the operation time determined by the ECU (30).

이러한 본 발명 장치의 동작 및 작용효과를 제2도 내지 제4도를 참조하여 설명하면 다음과 같다.The operation and effects of the device of the present invention will be described with reference to FIGS. 2 to 4 as follows.

본 발명 배기가스 정화장치는 엔지(5)의 상태에 따라서 그 동작이 결정되는데(S1), 키스위치(23)의 상태가 시동중이면 S2를 수행하고, 시동중이 아니면 S3를 수행하게 된다.The operation of the exhaust gas purifying apparatus of the present invention is determined according to the state of the engine 5 (S1). If the state of the key switch 23 is starting, S2 is performed, and if not, S3 is performed.

먼저, 엔진(5)의 시동중이며, 흡기온세서(22)에서 시동시 냉각수온도를 검출하고, 냉각수온센서(21)에서 엔진(5)의 냉각수온도를 검출하여, 제4도의 (a), (b)에 도시된 각각의 시동시흡입공기온도와 시동시냉각수 온도에 제1동작시간 및 제2동작시간을 산정하여, 제1동작시간과 제2동작시간을 합산한 EHC(50)의 최종 동작시간을 산출하게 된다.First, the engine 5 is being started, the coolant temperature at start-up is detected by the intake air temperature generator 22, and the coolant temperature of the engine 5 is detected by the coolant temperature sensor 21, (a), The first operating time and the second operating time are calculated for each of the start-up intake air temperature and the start-up coolant temperature shown in (b), and the final operation of the EHC 50 is obtained by adding up the first operating time and the second operating time. The operation time is calculated.

최종적으로 산출된 최종동작시간이 실질적으로 EHC(50)의 가열동작을 하기 위하여, 타이머(40)에 그 시간이 세팅되면, 타이머(40)는 세팅된 시간동안 EHC(50)의 가열동작을 하도록 배터리(BAT)의 전원을 인가하게 된다(S2). 한편, 엔진(5)이 시동중이 아니면, 타이머(40)에 세팅된 시간에 따라 EHC(50)를 제어하는데, 세팅된 시간이 0이면 EHC(50)의 가열동작을 하지 않게 되고, 세팅된 시간이 0이 아니면, 기존에 세팅되어 있던 시간을 타이머(40)에 재세팅하여, 재세팅된 시간동안 EHC(50)의 가열동작을 하게 된다(S3).When the final calculated operation time is set to the timer 40 so that the final operation time is substantially the heating operation of the EHC 50, the timer 40 is configured to perform the heating operation of the EHC 50 for the set time. The power of the battery BAT is applied (S2). On the other hand, when the engine 5 is not starting, the EHC 50 is controlled according to the time set in the timer 40. When the set time is 0, the heating operation of the EHC 50 is not performed. If the time is not 0, the previously set time is reset to the timer 40, and the heating operation of the EHC 50 is performed during the reset time (S3).

상기 타이머(40)에 세팅된 값이 0의 의미는 엔진이 충분히 난기되어 EHC(50)의 별도의 가열이 필요없는 경우를 의미한다.The value set to 0 in the timer 40 means that the engine is sufficiently warmed so that no separate heating of the EHC 50 is required.

따라서, 본 발명장치는 EHC의 가열동작시간의 최적값이 엔진시동시 엔진상태에 따라 결정되므로, 이를 감지하여 효율적으로 EHC을 제어함으로서 EHC의 소비전력을 감소할 수 있다.Therefore, since the optimum value of the heating operation time of the EHC is determined according to the engine state at engine startup, the apparatus of the present invention can reduce the power consumption of the EHC by detecting and efficiently controlling the EHC.

Claims (2)

냉각수 온도를 검출하는 냉각수온센서와; 엔진으로 흡입되는 흡입공기 온도를 검출는 흡기온센서와; 엔진에서 배출되는 배기가스의 온도를 강제적으로 상승시키는 EHC(Electric Heated Catalist)와; 상기 냉각 수온센서 및 흡기온센서의 출력에 따라 EHC의 작동시간을 결정하고, 키스위치와 접속되어 차량의 시동상태를 감지하는 ECU(Engine Control Unit)(30)와; 상기 ECU에서 결정된 동작시간에 따라 EHC의 동작을 타이머로 구성함을 특징으로 하는 자동차의 배기가스 정화장치.A coolant temperature sensor detecting a coolant temperature; An intake air temperature sensor for detecting intake air temperature drawn into the engine; EHC (Electric Heated Catalist) forcibly raising the temperature of the exhaust gas discharged from the engine; An ECU (Engine Control Unit) 30 which determines an operation time of the EHC according to the output of the cooling water temperature sensor and the intake air temperature sensor, and is connected to a key switch and detects a starting state of the vehicle; The apparatus for purifying exhaust gases of a vehicle, characterized in that the operation of the EHC is configured as a timer according to the operation time determined by the ECU. 엔진의 시동상태를 판단하는 엔진상태검출단계와; 엔진이 시동상태일때 냉각수온도에 따른 EHC의 가열기능동작시간과 흡입공기온도에 따른 EHC의 가열기능동작시간을 합한 EHC의 가열기능동작시간의 타이머에 세팅하여 세팅된 시간동안 EHC의 가열기능을 수행하는 엔진시동시 EHC 제어단계; 엔진시동후 엔진이 충분히 가열되어 배기가스가 일정온도가 될때까지의 EHC의 동작을 결정하는 엔진시동후 EHC 제어단계로 구성함을 특징으로 하는 자동차 배기가스 정화장치의 제어방법.An engine state detecting step of determining a start state of the engine; When the engine is started, the EHC heating function operating time according to the coolant temperature and the heating function operating time of the EHC according to the intake air temperature are set to the timer of the heating function operating time of the EHC. An EHC control step when the engine is started; A method of controlling an automobile exhaust gas purification device, comprising: an EHC control step after engine start to determine the operation of the EHC until the engine is sufficiently heated after the engine starts and the exhaust gas reaches a predetermined temperature.
KR1019950010755A 1995-05-02 1995-05-02 Exhaust gas purifying apparatus & controlling method of a car KR970001934B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950010755A KR970001934B1 (en) 1995-05-02 1995-05-02 Exhaust gas purifying apparatus & controlling method of a car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950010755A KR970001934B1 (en) 1995-05-02 1995-05-02 Exhaust gas purifying apparatus & controlling method of a car

Publications (2)

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KR960041635A KR960041635A (en) 1996-12-19
KR970001934B1 true KR970001934B1 (en) 1997-02-19

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