KR930013445A - Lean combustion control system of internal combustion engine - Google Patents

Lean combustion control system of internal combustion engine Download PDF

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Publication number
KR930013445A
KR930013445A KR1019910024434A KR910024434A KR930013445A KR 930013445 A KR930013445 A KR 930013445A KR 1019910024434 A KR1019910024434 A KR 1019910024434A KR 910024434 A KR910024434 A KR 910024434A KR 930013445 A KR930013445 A KR 930013445A
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KR
South Korea
Prior art keywords
engine
terminal
fuel ratio
scv
air
Prior art date
Application number
KR1019910024434A
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Korean (ko)
Inventor
천동필
엄인용
Original Assignee
전성원
현대자동차 주식회사
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Publication date
Application filed by 전성원, 현대자동차 주식회사 filed Critical 전성원
Priority to KR1019910024434A priority Critical patent/KR930013445A/en
Publication of KR930013445A publication Critical patent/KR930013445A/en

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Abstract

플라이휠에 부착되어 회전되는 톱니의 수를 감지하여 전기적 신호로 변환함으로써 크랭크축의 각 속도를 감지하는 센서휠과, 상기한 센서휠의 출력단자에 입력단자가 연결되어, SCV 구동용 솔레노이드를 펄스폭변조방식으로 제어함으로써 보다 세밀하게 기관의 공연비를 희박연소 상태로 유지하고, 희박연소에 의한 미점화가 발생할 경우에 이를 감지하여 공연비를 일정량 만큼 농후하게 조정함으로써 토크의 저하를 방지하는 전자제어장치와, 전원전압과 전자제어장치의 출력단자에 입력단자가 연결되어 전자제어장치로부터 출력되는 펄스폭변조 신호에 의해 SCV를 구동하는 SCV구동용 솔레노이드로 구성되어, 기관의 공연비를 거의 희박상태에 가까운 최적의 상태에서 운전되도록 하면서 기관의 미점화를 감지하여 미점화가 발생될 경우에 기관의 공연비를 적절하게 조정함으로써 토크의 급격한 변동을 방지하는 내연기관의 희박연소 제어시스템에 관한 것.The sensor wheel detects each speed of the crankshaft by detecting the number of teeth that are attached to the flywheel and converts it into an electrical signal, and an input terminal is connected to the output terminal of the sensor wheel. Electronic control device to maintain the air-fuel ratio of the engine in a lean burn state more finely by controlling in a manner, and to detect when the unignition caused by lean burn occurs, and to adjust the air-fuel ratio by a certain amount to prevent a drop in torque; The input terminal is connected to the power supply voltage and the output terminal of the electronic controller, and consists of an SCV driving solenoid that drives the SCV by the pulse width modulated signal output from the electronic controller. The engine can be operated in a state that detects unignition of the engine and, when an unignition occurs, By properly adjusting the fuel consumption relates to the lean combustion control system for an internal combustion engine to prevent a sudden change of the torque.

Description

내연기관의 희박연소 제어시스템Lean combustion control system of internal combustion engine

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

제1도는 이 발명의 실시예에 따른 내연기관의 희박연소 제어시스템의 회로도이고,1 is a circuit diagram of a lean burn control system of an internal combustion engine according to an embodiment of the present invention,

제2도는 이 발명의 실시예에 따른 기관의 회전수와 흡입 공기량에 따른 공연비 영역도이다.2 is an air-fuel ratio region diagram according to the rotational speed and the amount of intake air of the engine according to the embodiment of the present invention.

Claims (3)

플라이휠에 부착되어 회전되는 톱니의 수를 감지하여 전기적 신호로 변환함으로써 크랭크축의 각 속도를 감지하는 센서휠과, 상기한 센서휠의 출력단자에 입력단자가 연결되어, SCV 구동용 솔레노어드를 펄스폭변조 방식으로 제어함으로써 보다 세밀하게 기관의 공연비를 희박연소 상태로 유지하고, 희박연소에 의한 미점화가 발생할 경우에 이를 감지하여 공연비를 일정량 만큼 농후하게 조정함으로써 토크의 저하를 방지하는 전자제어장치와, 전원전압과 전자제어장치의 출력단자에 입력단자가 연결되어 전자제어장치로부터 출력되는 펄스폭변조 신호에 의해 SCV를 구동하는 SCV구동용 솔레노이드로 이루어지는 것을 특징으로 하는 내연기관의 희박연소 제어시스템.A sensor wheel that detects each speed of the crankshaft by detecting the number of teeth rotated attached to the flywheel and converting it into an electrical signal, and an input terminal is connected to the output terminal of the sensor wheel, pulses the solenoid for driving the SCV. By controlling the width modulation method, the electronic control device keeps the air-fuel ratio of the engine in a lean burn state more precisely, and detects the occurrence of unignition due to lean burn, and adjusts the air-fuel ratio by a certain amount to prevent a drop in torque. And an SCV drive solenoid for driving the SCV by a pulse width modulated signal outputted from the electronic control device by connecting an input terminal to a power supply voltage and an output terminal of the electronic control device. . 제1항에 있어서, 상기한 전자제어장치는 마이크로 컨트를러(21)와, 마이크로 컨트롤러(21)의 출력단자에 베이스 단자가 연결되고 에미터 단자는 접지된 트랜지스터(Q21)와, 트랜지스터(Q21)의 컬렉터 단자에 캐소드가 연결되고 애노드는 접지된 다이오드(D21)와, 트랜지스터(Q21)의 컬렉터 단자에 애노드가 연결되고 전원전압(Vcc)에 캐소드가 연결된 다이오드(D22)로 이루어지는 것을 특징으로 하는 내연기관의 희박연소 제어시스템.The electronic controller of claim 1, wherein the electronic controller includes a microcontroller 21, a base terminal connected to an output terminal of the microcontroller 21, an emitter terminal connected to a ground, and a transistor Q21. The cathode is connected to the collector terminal of the () and the anode is a grounded diode (D21), and the diode is connected to the collector terminal of the transistor (Q21) and the diode (D22), the cathode is connected to the power supply voltage (Vcc) Lean combustion control system of internal combustion engine. 제2항에 있어서, 상기한 마이크로 컨트롤러(21)는 센서휠(10)의 톱니 감지신호로부터 크랭크축의 각속도변화량(ER)을 계산하고 계산된 각속도변화량(ER)이 일정치 이상이면 미점화로 판단하여 공연비를 일정량 만큼 농후하게 하기 위한 신호를 출력하는 것을 특징으로 하는 내연기관의 희박연소 제어시스템.The microcontroller 21 calculates the angular velocity change ER of the crankshaft from the sawtooth detection signal of the sensor wheel 10 and determines that it is unignitioned if the calculated angular velocity change ER is above a certain value. And outputting a signal for enriching the air-fuel ratio by a predetermined amount. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910024434A 1991-12-26 1991-12-26 Lean combustion control system of internal combustion engine KR930013445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910024434A KR930013445A (en) 1991-12-26 1991-12-26 Lean combustion control system of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910024434A KR930013445A (en) 1991-12-26 1991-12-26 Lean combustion control system of internal combustion engine

Publications (1)

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KR930013445A true KR930013445A (en) 1993-07-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418771B1 (en) * 2000-12-30 2004-02-18 기아자동차주식회사 Operation controlling method of lean burn engine for a vehicle
KR20040031215A (en) * 2002-10-04 2004-04-13 현대자동차주식회사 Fuel-air ratio controlling method of diesel engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418771B1 (en) * 2000-12-30 2004-02-18 기아자동차주식회사 Operation controlling method of lean burn engine for a vehicle
KR20040031215A (en) * 2002-10-04 2004-04-13 현대자동차주식회사 Fuel-air ratio controlling method of diesel engine

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