KR970027669A

KR970027669A - Catalyst Protection Device for Automobile Exhaust System

Info

Publication number: KR970027669A
Application number: KR1019950042730A
Authority: KR
Inventors: 정찬
Original assignee: 김태구; 대우자동차 주식회사
Priority date: 1995-11-22
Filing date: 1995-11-22
Publication date: 1997-06-24

Abstract

본 발명은 인체에 유해한 자동차의 배기가스를 정화하는 작용을 하는 배기정화장치의 카타리틱 컨버터에 마련되어 있는 3원촉매제가 내열온도를 넘어서 타버리는 것을 방지할 수 있는 자동차 배기정화장치의 촉매보호장치를 제공하기 위하여 자동차의 카타리틱 컨버터(30) 내에 설치되어 있는 3원촉매제(31)의 온도변화에 따라 일정하게 변화하는 전기적인 온도신호를 출력하는 온도검출수단(32)과, 상기 온도검출수단(32)으로부터 검출된 3원촉매제(31)의 온도에 해당하는 아날로그적인 온도정보를 디지탈정보로 변환하는 A/D컨버터(33)와, 상기 A/D컨버터(33)로부터 출력되는 디지탈신호를 전자제어 유닛(34)의 작동전압으로 바꾸어 전자제어 유닛(34)의 연산에 적합하도록 A/D컨버터(33)와 전자제어 유닛(34)간에 중계 역할을 하는 입력수단(35)과, 상기 입력수단(35)을 통해 수신되는 3원촉매제(31)의 온도정보를 기초로 하여 미리 설정된 3원촉매제(31)의 내열온도(t℃)에 소정의 범위내로 가까워졌는가의 여부를 판단하여 자동차 드로틀밸브(DV)의 개도량을 제어하는 전자제어 유닛(34)과, 상기 전자제어 유닛(34)으로부터 출력되는 드로틀개도량 제어신호를 자동차의 트로틀 밸브제어부(36)에 전송하는 출력수단(37)을 갖추어 구성한 것이다.The present invention provides a catalyst protection device for an automobile exhaust purification apparatus which can prevent the ternary catalyst provided in the catalytic converter of the exhaust purification apparatus, which acts to purify the exhaust gas of the automobile, which is harmful to the human body, over burning. In order to provide a temperature detecting means 32 for outputting an electric temperature signal that is constantly changed in accordance with the temperature change of the ternary catalyst 31 installed in the catalytic converter 30 of the vehicle, and the temperature detecting means ( A / D converter 33 for converting analog temperature information corresponding to the temperature of the ternary catalyst 31 detected from 32 into digital information, and a digital signal output from the A / D converter 33. An input means 35 serving as a relay between the A / D converter 33 and the electronic control unit 34 so as to be adapted to the operation of the electronic control unit 34 by changing to the operating voltage of the control unit 34; On the basis of the temperature information of the three-way catalyst 31 received through the (35), it is determined whether or not the heat resistance temperature (t ℃) of the three-way catalyst 31 is set within a predetermined range to approach the vehicle throttle valve An electronic control unit 34 for controlling the opening amount of the DV and an output means 37 for transmitting the throttle opening degree control signal output from the electronic control unit 34 to the throttle valve control unit 36 of the vehicle; It is made up.

Description

Catalyst Protection Device for Automobile Exhaust System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 일반적인 자동차의 배기정화장치의 구성을 개략적으로 보이는 사시도.1 is a perspective view schematically showing the configuration of the exhaust purification apparatus of a general vehicle.

제2도는 일반적인 자동차의 이론 공연비와 농후한 공연비를 설명하기 위한 그래프.2 is a graph for explaining the theoretical air-fuel ratio and rich air-fuel ratio of a typical car.

제3도는 본 발명에 따른 자동차 배기정화장치의 촉매보호장치의 구성을 개략적으로 보이는 블럭도.Figure 3 is a block diagram schematically showing the configuration of the catalyst protection device of the vehicle exhaust purification apparatus according to the present invention.

제4도는 본 발명에 따른 자동차 배기정화장치의 촉매보호장치의 동작을 설명하기 위한 플로우 차트이다.4 is a flow chart for explaining the operation of the catalyst protection device of the vehicle exhaust purification apparatus according to the present invention.

Claims

In a vehicle exhaust purification apparatus equipped with a catalytic converter for purifying exhaust gas emitted from an automobile engine by using a ternary catalyst, according to a temperature change of the ternary catalyst 31 installed in the catalytic converter 30. Converting analog temperature information corresponding to the temperature of the ternary catalyst 31 detected by the temperature detecting means 32 and the temperature detecting means 32 that outputs a constantly changing electrical temperature signal into digital information. The A / D converter 33 and the digital signal output from the A / D converter 33 are converted into an operating voltage of the electronic control unit 34 to be suitable for the operation of the electronic control unit 34. 33) and a three-way catalyst set in advance based on the temperature information of the three-way catalyst 31 received through the input means 35 and the input means 35 serving as a relay between the electronic control unit 34 ( 31) Predetermined range of heat resistance temperature (t ℃) The electronic control unit 34 for controlling the opening amount of the vehicle throttle valve DV by judging whether the vehicle is close to the inside, and the throttle opening degree control signal output from the electronic control unit 34 are controlled by the vehicle throttle valve control unit ( A catalyst protection device for an automobile exhaust purification apparatus, characterized by comprising an output means 37 for transmitting to 36).

2. The catalyst protection device for an automobile exhaust purification apparatus according to claim 1, wherein the temperature detection means (32) is a demister installed inside the catalytic converter (30) of the automobile.

※ Note: The disclosure is based on the initial application.