KR940015213A - Air-fuel ratio control device and method for internal combustion engine according to the change of vehicle status - Google Patents

Air-fuel ratio control device and method for internal combustion engine according to the change of vehicle status Download PDF

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KR940015213A
KR940015213A KR1019920024018A KR920024018A KR940015213A KR 940015213 A KR940015213 A KR 940015213A KR 1019920024018 A KR1019920024018 A KR 1019920024018A KR 920024018 A KR920024018 A KR 920024018A KR 940015213 A KR940015213 A KR 940015213A
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air
fuel ratio
state
internal combustion
combustion engine
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KR1019920024018A
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KR0154019B1 (en
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고동완
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전성원
현대자동차 주식회사
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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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

엔진의 상태변화에 따라 각각 상이한 제어방식을 적용하여 제어응답성을 개선시켜 자동차의 상태에 맞게 적당한 공연비를 계산할 수 있도록 하기 위하여; 배기가스에 혼합되어 있는 산소의 농도와 엔진의 회전수 및 스로틀 밸브의 개도정도를 감지하여 해당하는 전기적인 신호를 출력하는 감지부와; 상기 감지부와 연결되어 산소의 농도를 감지하는 감지부의 동작 상태를 판단하여 정상적인 동작을 수행할수 없는 상태에 있을 경우에 이미 설정된 데이타를 이용하여 공연비를 설정하고, 산소 감지부의 상태가 정상적인 동작을 할수 있는 활성영역에 도달할 경우 내연기관의 상태를 판단하고, 내연기관의 상태가 공회전상태일 경우에 감지된 산소의 농도에 맞는 공연비를 계산하고, 자동차의 상태에 맞게 이미 설정되어 있는 데이타에서 현재의 상태에 해당하는 공연비를 판독하고, 계산된 공연비와 설정된 표준 공연비간의 오차를 계산하여 계산된 오차를 보정하기 위한 이득을 계산하고, 감지된 산소의 농도와 설정된 목표치와 비교하여 각 상태에 맞게 설정되어 있는 공연비의 연산식을 이용하여 공연비를 제어하고, 내연기관의 상태가 정상일때일 경우에 감지된 산소의 농도에 맞게 공연비를 계산하고, 이미 설정된 데이타에서 자동차의 상태에 해당하는 공연비를 판독하고, 게산된 공연비와 설정된 공연비 간의 오차를 계산하여 계산된 오차를 보정하기 위한 이득을 계산하고, 산소의 농도를 판단하여 산소의 농도가 희박할 경우와 농후할 경우 각 상태에 맞게 설정되어 있는 공연비의 연산식을 이용하여 공연비를 제어하는 엔진 제어부로 이루어져 있는 자동차 상태 변화에 따른 내연기관의 공연비 제어장치 및 그 방법에 관한 것.In order to calculate the appropriate air-fuel ratio according to the state of the vehicle by improving the control response by applying different control schemes in accordance with the change of the engine state; A detector for detecting the concentration of oxygen mixed with the exhaust gas, the number of rotations of the engine, and the degree of opening of the throttle valve, and outputting a corresponding electric signal; The air conditioner can be set using the data already set when it is in a state where the normal operation cannot be performed by determining the operation state of the detection unit that detects the concentration of oxygen, and the state of the oxygen detection unit can operate normally. When the internal combustion engine is reached, the state of the internal combustion engine is judged, and when the state of the internal combustion engine is idling, the air-fuel ratio corresponding to the detected oxygen concentration is calculated. It reads the air-fuel ratio corresponding to the state, calculates the error between the calculated air-fuel ratio and the set standard air-fuel ratio, calculates the gain for correcting the calculated error, and compares the detected oxygen concentration with the set target value and is set for each state. The air-fuel ratio is controlled using the calculation formula of the air-fuel ratio, and the internal combustion engine is in a normal state. Calculate the air-fuel ratio according to the detected oxygen concentration, read the air-fuel ratio corresponding to the state of the car from the already set data, calculate the error between the calculated air-fuel ratio and the set air-fuel ratio, and calculate the gain to correct the calculated error. , The air-fuel ratio of the internal combustion engine according to the change in the vehicle state, which is composed of an engine control unit that controls the air-fuel ratio by using the air-fuel ratio formula set for each state when the oxygen concentration is lean and rich by judging the concentration of oxygen. Of control device and method thereof.

Description

자동차 상태변화에 따른 내연기관의 공연비 제어장치 및 그 방법Air-fuel ratio control device and method for internal combustion engine according to the change of vehicle status

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 이 발명의 실시예에 따른 자동차 상태변화에 따른 내연기관의 공연비 제어장치의 블럭도이고, 제2도는 이 발명의 실시예에 따른 자동차 상태변화에 따른 내연기관의 공연비 제어방법의 동작순서도이다.1 is a block diagram of an air-fuel ratio control apparatus for an internal combustion engine according to a change in vehicle state according to an embodiment of the present invention, and FIG. 2 is a flowchart of an air-fuel ratio control method for an internal combustion engine according to a change in vehicle state according to an embodiment of the present invention. to be.

Claims (4)

배기가스에 혼합되어 있는 산소의 농도와 엔진의 회전수 및 스로틀 밸브의 개도정도를 감지하여 해당하는 전기적인 신호를 출력하는 감지부와; 상기 감지부와 연결되어 산소의 농도를 감지하는 감지부의 동작 상태를 판단하여 정상적인 동작을 수행할수 없는 상태에 있을 경우에 이미 설정된 데이타를 이용하여 공연비를 설정하고, 산소 감지부의 상태가 정상적인 동작을 할수 있는 활성영역에 도달할 경우 내연기관의 상태를 판단하고, 내연기관의 상태가 공회전상태일 경우에 감지된 산소의 농도에 맞는 공연비를 계산하고, 자동차의 상태에 맞게 이미 설정되어 있는 데이타에서 현재의 상태에 해당하는 공연비를 판독하고, 계산된 공연비와 설정된 표준 공연비간의 오차를 계산하여 계산된 오차를 보정하기 위한 이득을 계산하고, 감지된 산소의 농도와 설정된 목표치와 비교하여 각 상태에 맞게 설정되어 있는 공연비의 연산식을 이용하여 공연비를 제어하고, 내연기관의 상태가 정상일때일 경우에 감지된 산소의 농도에 맞게 공연비를 계산하고, 이미 설정된 데이타에서 자동차의 상태에 해당하는 공연비를 판독하고, 계산된 공연비와 설정된 공연비 간의 오차를 계산하여 계산된 오차를 보정하기 위한 이득을 계산하고, 산소의 농도를 판단하여 산소의 농도가 희박할 경우와 농후할 경우 각 상태에 맞게 설정되어 있는 공연비의 연산식을 이용하여 공연비를 제어하는 엔진 제어부로 이루어져 있는 자동차 상태 변화에 따른 내연기관의 공연비 제어장치.A detector for detecting the concentration of oxygen mixed with the exhaust gas, the number of rotations of the engine, and the degree of opening of the throttle valve, and outputting a corresponding electric signal; The air conditioner can be set using the data already set when it is in a state where the normal operation cannot be performed by determining the operation state of the detection unit that detects the concentration of oxygen, and the state of the oxygen detection unit can operate normally. When the internal combustion engine is reached, the state of the internal combustion engine is judged, and when the state of the internal combustion engine is idling, the air-fuel ratio corresponding to the detected oxygen concentration is calculated. It reads the air-fuel ratio corresponding to the state, calculates the error between the calculated air-fuel ratio and the set standard air-fuel ratio, calculates the gain for correcting the calculated error, and compares the detected oxygen concentration with the set target value and is set for each state. The air-fuel ratio is controlled using the calculation formula of the air-fuel ratio, and the internal combustion engine is in a normal state. Calculate the air-fuel ratio according to the detected oxygen concentration, read the air-fuel ratio corresponding to the state of the car from the already set data, calculate the error between the calculated air-fuel ratio and the set air-fuel ratio, and calculate the gain to correct the calculated error. , The air-fuel ratio of the internal combustion engine according to the change in the vehicle state, which is composed of an engine control unit that controls the air-fuel ratio by using the air-fuel ratio formula set for each state when the oxygen concentration is lean and rich by judging the concentration of oxygen. Control unit. 제1항에 있어서, 내연기관의 공연비를 제어하는 엔진 제어부는 공회전상태일 경우에 비례이득과 적분이득 및 미분이득을 이용하여 공연비를 보정하고, 공회전상태가 아닐 경우에 비례이득과 적분이득을 이용하여 공연비를 보정하는 것을 특징으로 하는 자동차 상태 변화에 따른 내연기관의 공연비 제어장치.The engine control unit of claim 1, wherein the engine control unit controls the air-fuel ratio of the internal combustion engine by correcting the air-fuel ratio by using the proportional gain, the integral gain and the derivative gain when the engine is idle, and using the proportional gain and the integral gain when the engine is not idle. Air-fuel ratio control device of the internal combustion engine according to the change in the vehicle state, characterized in that to correct the air-fuel ratio. 제1항에 있어서, 내연기관의 공연비를 제어하는 엔진 제어부는 내연기관의 공회전상태와 정상상태일 경우에 각각 다른 연산식을 이용하여 공연비를 제어하는 엔진 제어부에서 계산 이득값을 전 공연비에서 더하거나 빼서 공연비를 보정하는 것을 특징으로 하는 자동차 상태 변화에 따른 내연기관의 공연비 제어장치.The engine control unit of claim 1, wherein the engine control unit controlling the air-fuel ratio of the internal combustion engine adds or subtracts a calculated gain value from the previous air-fuel ratio by using an engine equation that controls the air-fuel ratio by using different calculation equations in the idle state and the normal state of the internal combustion engine. Air-fuel ratio control device of the internal combustion engine according to the change in the vehicle state, characterized in that for correcting the air-fuel ratio. 산소의 농도를 감지하는 감지부의 동작 상태를 판단하여 정상적인 동작을 수행할수 없는 상태에 있을 경우에 이미 설정된 데이타를 이용하여 공연비를 설정하고, 산소 감지부의 상태가 정상적인 동작을 할수 있는 활성영역에 도달할 경우 내연기관의 상태를 판단하고, 내연기관의 상태가 공회전상태일 경우에 감지된 산소의 농도에 맞는 공연비를 계산하고, 자동차의 상태에 맞게 이미 설정되어 있는 데이타에서 현재의 상태에 해당하는 공연비를 판독하고, 계산된 공연비와 설정된 표준 공연비간의 오차를 계산하여 계산된 오차를 보정하기 위한 이득을 계산하고, 감지된 산소의 농도와 설정된 목표치와 비교하여 각 상태에 맞게 설정되어 있는 공연비의 연산식을 이용하여 공연비를 제어하고, 내연기관의 상태가 정상상태일 경우에 감지된 산소의 농도에 맞게 공연비를 계산하고, 이미 설정된 데이타에서 자동차의 상태에 해당하는 공연비를 판독하고, 계산된 공연비와 설정된 공연비 간의 오차를 계산하여 계산된 오차를 보정하기 위한 이득을 계산하고, 산소의 농도를 판단하여 산소의 농도가 희박할 경우와 농후할 경우 각 상태에 맞게 설정되어 있는 공연비의 연산식을 이용하여 공연비를 제어하는 방법으로 이루어져 있는 자동차 상태변화에 따른 내연기관의 공연비 제어방법.When the operating state of the detector detecting the concentration of oxygen is in a state where normal operation cannot be performed, the air-fuel ratio is set by using the already set data, and the state of the oxygen detector reaches an active area where normal operation can be performed. In this case, the state of the internal combustion engine is determined, and when the state of the internal combustion engine is idle, the air-fuel ratio corresponding to the detected oxygen concentration is calculated, and the air-fuel ratio corresponding to the current state is calculated from the data already set according to the state of the vehicle. Read and calculate the error between the calculated air-fuel ratio and the set standard air-fuel ratio to calculate the gain to correct the calculated error, and compare the detected oxygen concentration with the set target value to calculate the formula of air-fuel ratio set for each state To control the air-fuel ratio, and the oxygen concentration detected when the internal combustion engine is in a normal state. Calculate the air-fuel ratio according to the air conditioner, read the air-fuel ratio corresponding to the state of the car from the already set data, calculate the error between the calculated air-fuel ratio and the set air-fuel ratio, calculate the gain to correct the calculated error, and determine the oxygen concentration. If the oxygen concentration is thin and thick, the air-fuel ratio control method of the internal combustion engine according to the state of the vehicle consisting of the method of controlling the air-fuel ratio by using the calculation formula of the air-fuel ratio set for each state. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920024018A 1992-12-11 1992-12-11 Air/fuel ratio control device and method of engin state KR0154019B1 (en)

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KR1019920024018A KR0154019B1 (en) 1992-12-11 1992-12-11 Air/fuel ratio control device and method of engin state

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100794542B1 (en) * 2005-12-28 2008-01-17 도요다 지도샤 가부시끼가이샤 Power output apparatus, vehicle equipped with power output apparatus, and control method of power output apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020038216A (en) * 2000-11-17 2002-05-23 류정열 Compensation method for control of air-fuel ratio at warming-up

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100794542B1 (en) * 2005-12-28 2008-01-17 도요다 지도샤 가부시끼가이샤 Power output apparatus, vehicle equipped with power output apparatus, and control method of power output apparatus

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