KR100272776B1 - Duty control method of the vortex control valve - Google Patents

Duty control method of the vortex control valve Download PDF

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Publication number
KR100272776B1
KR100272776B1 KR1019960073058A KR19960073058A KR100272776B1 KR 100272776 B1 KR100272776 B1 KR 100272776B1 KR 1019960073058 A KR1019960073058 A KR 1019960073058A KR 19960073058 A KR19960073058 A KR 19960073058A KR 100272776 B1 KR100272776 B1 KR 100272776B1
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South Korea
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scv
duty
isc
satisfied
vortex
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KR1019960073058A
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Korean (ko)
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KR19980053929A (en
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한도
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정몽규
현대자동차주식회사
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits

Abstract

PURPOSE: A controlling method for duty of an SCV(Swirl Control Valve) is provided to improve driving property through preventing sudden torque change by controlling the SCV after controlling an ISC(Idle Speed Control) duty. CONSTITUTION: Satisfaction of worm up state rpm(revolutions per minute) condition and load condition is decided. Then, a delay time is established to perform an ISC operation by using an ISC operation duty. After the delayed time, an SCV operation is performed by using an SCV operation duty. In case of an SCV operation area is satisfied, an ISC is closed by using an ISC close duty. Then, an SCV is closed by using an SCV close duty after a specific time.

Description

와류 컨트롤 밸브의 듀티 제어방법Duty Control Method of Vortex Control Valve

본 발명은 와류 컨트롤 밸브(Swirl Control Valve ; SCV)의 듀티(Duty)제어방법에 관한 것으로 특히 ISC(Idle Speed Control)듀티 제어후 SCV를 제어하여 운전성 향상을 도모하기 위한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duty control method of a swirl control valve (SCV), particularly to improve the operability by controlling the SCV after an ISC (Idle Speed Control) duty control.

일반적으로, 와류는 연소실내의 공기, 혼합기, 연소가스 등의 소용돌이를 말하는 것으로, 디젤 엔진에 있어서는 압축된 공기중에 연료를 분사하고 자연발화에 의하여 혼합가스를 완전연소 시키는데에는 공기와 연료가 잘 혼합될 필요가 있다.In general, vortex refers to the vortex of air, mixer, combustion gas, etc. in the combustion chamber. In a diesel engine, air and fuel are well mixed in order to inject fuel into compressed air and completely burn the mixed gas by spontaneous combustion. Need to be.

흡입, 압축행정을 통해서 연소실내에 어떻게 하면 강한 와류가 발생시킬 수 있는가의 기술적인 문제는 엔진을 설계하는데 중요한 포인트로 되어 있다. 또 일부의 가솔린 엔진에서는 연비를 좋게 하기 위하여 농후한 혼합가스와 희박한 혼합가스를 연소실에 보내어 농후한 혼합가스에 착화한 다음 와류를 이용하여 희박한 혼합기와 섞어 완전연소가 이루어지도록 연구하고 있는 실정이다.The technical problem of how strong vortices can be generated in the combustion chamber through suction and compression strokes is an important point in the design of the engine. In addition, in some gasoline engines, in order to improve fuel economy, a rich mixed gas and a lean mixed gas are sent to the combustion chamber to ignite the rich mixed gas and then mixed with the lean mixture using a vortex to achieve complete combustion.

이와 같은 와류를 컨트롤 하는 밸브가 와류 컨트롤 밸브 즉, 흡기구멍내에 설치되어 있는 밸브인데 이는 밸브의 방향을 바꾸어 흡기포트를 와류 포트로 변화시키거나 보통의 흡기포트로 사용하고, 출력의 향상과 연비의 개선을 꾀하는데 사용하고 있다.Such a vortex control valve is a vortex control valve, that is, a valve installed in the intake hole, which changes the direction of the valve to change the intake port to the vortex port, or to use as a normal intake port. It is used to improve.

종래 위와 같은 작용을 하는 와류 컨트롤 밸브는 와류의 생성을 위하여 와류컨트롤 밸브를 온/오프할시 강한 와류에 의해 급격한 토크(Troque)변화가 일어나 진동발생의 요인이 되고, 뿐만 아니라 가속이 좋지않아 운전성이 크게 저하되는 문제점이 지적된다.Conventionally, the vortex control valve acting as above causes sudden torque change due to strong vortex when the vortex control valve is turned on / off to generate vortices, causing vibration, and also not accelerating. It is pointed out that the problem is that the sex is greatly reduced.

본 발명은 상기와 같이 와류 컨트롤 밸브 온/오프시 발생되는 급격한 토크변화를 방지하기 위하여 창출한 것으로, 1SC듀티 제어후 SCV를 제어하여 급격한 토크변화를 방지하도록 함으로써 운전성을 향상시키도록 함을 목적으로 한다.The present invention was created in order to prevent a sudden torque change generated when the vortex control valve on / off as described above, to improve the operability by controlling the SCV after 1SC duty control to prevent a sudden torque change. It is done.

상기한 과제를 달성하기 위한 본 발명은 SCV제어를 시작했는지를 판단하는 단계와, 상기 단계에서 웜업상태, rpm조건, 부하조건을 만족하는지를 판단하는 단계와, 지연시간을 설정하는 단계와, 상기 설정된 시간동안 ISC듀티를 행하고 지연시간 경과후 SCV 작동 듀티제어를 행하여 SCV작동을 하고 상기 SCV조건 만족이 되면 지연시간후 ISA 및 SCV폐쇄를 행하도록 하는 단계와로 이루어짐을 특징으로 한다.The present invention for achieving the above object is the step of determining whether the SCV control has started, the step of determining whether the warm-up state, rpm conditions, load conditions are satisfied, setting the delay time, and the set After performing the ISC duty for a time and the SCV operation duty control after the delay time elapses, the SCV operation is performed, and if the SCV condition is satisfied, ISA and SCV closing are performed after the delay time.

이와 같은 본 발명은 와류 컨트롤 밸브 작동 온/오프시 급격한 흡입 공기량 변화에 의한 급격한 토크 변화를 방지하게 되어 운전성을 크게 향상시킬 수 있게 되는 것이다.Such the present invention is to prevent the sudden torque change caused by the sudden intake air amount change when the vortex control valve operation on / off is to be able to greatly improve the operability.

제1도는 본 발명을 설명하기 위한 공기흡입 시스템 구성도.1 is a block diagram of an air intake system for explaining the present invention.

제2도는 본 발명의 플로우 챠트.2 is a flow chart of the present invention.

제3도는 본 발명을 설명하기 위한 ISC 듀티와 SCV듀티의 작동관계 설명 파형도.3 is a waveform diagram illustrating an operation relationship between an ISC duty and an SCV duty for explaining the present invention.

제4도는 본 발명의 SCV 작동 영역을 나타낸 그래프.4 is a graph showing the SCV operating area of the present invention.

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

1 : 공기흐름시스템 2 : 서지탱크1: Air flow system 2: Surge tank

3 : 스로틀 밸브 4 : ISC밸브3: Throttle Valve 4: ISC Valve

5 : 흡기 매니폴드 7 : 엑츄에이터5: Intake manifold 7: Actuator

8 : 솔레노이드 9 : 베큘탱크8: solenoid 9: bekultank

제1도는 본 발명을 설명하기 위한 공기흡입 시스템 구성도이다.1 is a configuration diagram of an air intake system for explaining the present invention.

이에 의하면, 공기흐름시스템(1)과 서지탱크(2) 사이에 설치된 스로틀 밸브(3)와, 아이들링시 엔진 회전수 조정을 위한 ISC밸브(4)와, 상기 서지탱크(2) 하방의 흡기 매니폴드(5)에 설치된 SCV(6)를 작동케하는 엑츄에이터(7)와, 엔진콘트롤 유니트(ECU)에 의한 제어에 의해 작동되는 솔레노이드(8) 및 베큘탱크(9)와로 구성된다.Thereby, the throttle valve 3 provided between the airflow system 1 and the surge tank 2, the ISC valve 4 for adjusting the engine speed during idling, and the intake manifold below the surge tank 2 are provided. It consists of an actuator 7 for operating the SCV 6 installed in the fold 5, and a solenoid 8 and a beeul tank 9 operated by control by an engine control unit (ECU).

제2도는 본 발명의 플로우차트이다.2 is a flowchart of the present invention.

웜업상태 rpm조건 만족, 부하조건 만족 등이 이루어지는지를 판단하는 단계(S1∼S3)와, 상기 단계(S1∼S3)의 조건이 만족되면 지연시간을 설정하여 ISC작동 듀티로 ISC작동을 행하도록 하는 단계(S4∼S5)와, 상기 지연시간후 SCV 작동 듀티로 SCV 작동을 행하도록 하는 단계(S6-S8)와, 상기 단계(S8)에서 SCV 작동영역이 만족되는지를 판단하는 단계(S9)와, 상기 단계(S9)에서 SCV 작동영역이 만족되면 ISC 폐쇄듀티로 ISC를 폐쇄토록 하고 일정시간후 SCV 폐쇄 듀티로 SCV를 폐쇄토록 하는 단계(S10~S14)와로 이루어져 있다.Determining whether the warm-up state rpm condition is satisfied or the load condition is satisfied (S 1 ~ S 3 ), and if the conditions of the step (S 1 ~ S 3 ) is satisfied, the delay time is set to operate the ISC with the ISC operation duty. (S 4 to S 5 ), to perform the SCV operation with the SCV operation duty after the delay time (S 6- S 8 ), and the SCV operating region is satisfied in the step (S 8 ) Determining whether or not (S 9 ), and if the SCV operating region is satisfied in the step (S 9 ) to close the ISC with the ISC closed duty and to close the SCV with the SCV closed duty after a certain time (S 10 ~) S 14 ) and consists of.

제3도는 본 발명을 설명하기 위한 ISC듀티와 SCV듀티에 의한 작동관계 파형도로서 (a)도는 SCV작동 조건 파형도이고, (b)도는 ISC듀티,(c)도는 SCV듀티이다.3 is an operation related waveform diagram of ISC duty and SCV duty for explaining the present invention, (a) is an SCV operating condition waveform diagram, (b) is an ISC duty, (c) is an SCV duty.

제4도는 본 발명의 SCV 작동영역을 나타낸 부하와 엔진 회전수에 의한 그래프이다.4 is a graph of load and engine speed showing the SCV operating area of the present invention.

이와 같은 본 발명은 SCV제어를 위한 조건(웜업상태, rpm 및 부하조건 등)이 이루어지면(제3(a)도의 참조) 지연시간을 설정하여 우선적으로 ISC듀티로 ISC작동을 행하도록 하므로써 아이들링시의 엔진 회전수를 제어토록 하고, 이후 SCV를 작동시켜 공기와 연료를 와류에 의하여 혼합시키게 된다.In the present invention as described above, when the conditions for the SCV control (warm-up state, rpm, load condition, etc.) are made (see FIG. 3 (a)), a delay time is set to preferentially perform ISC operation with an ISC duty. The engine speed of the engine is controlled, and then the SCV is operated to mix air and fuel by vortex.

이때, SCV 작동시 와류에 의하여 급격히 흡입공기량이 연소실내로 들어오게 되어 급격한 토크 변화를 가져오게 되지만, 미리 ISC작동에 의하여 엔진 회전수를 제어토록 하고 있으므로 급격한 토크 변화를 방지하게 된다.At this time, the intake air is suddenly introduced into the combustion chamber by the vortex during the operation of the SCV, which causes a sudden torque change, but the sudden rotation of the engine is controlled by the ISC operation in advance to prevent the sudden torque change.

이와 같이 SCV가 작동을 하고, 그 작동영역(제4도 참조)이 만족되면 일정시간 후 ISC 및 SCV의 작동을 폐쇄하게 되어 안정적으로 연소를 행할 수 있게 되는 것이다.As such, when the SCV operates and the operating region (see FIG. 4) is satisfied, the operation of the ISC and the SCV is closed after a predetermined time, thereby stably combusting.

이상과 같이 본 발명은 와류 컨트롤 밸브 온/오프시 발생되는 급격한 흡입공기량의 변화에 대응하여 SCV작동전에 ISC네어를 통해 엔진 회전수를 안정적으로 조절케 함으로써 급격한 토크변화를 방지하게 되고, 이로인해 와류에 의한 연소효율을 높이게 됨과 동시에 급격한 쇼크없이 운전성 향상을 크게 도모할 수 있는 효과가 있다.As described above, the present invention prevents the sudden torque change by stably adjusting the engine rotation speed through the ISC nare before the SCV operation in response to the sudden change of the intake air volume generated when the vortex control valve is turned on / off. The combustion efficiency is increased and at the same time there is an effect that can greatly improve the operability without a sudden shock.

Claims (1)

웜업상태, rpm조건 만족, 부하조건 만족 등이 이루어지는지를 판단하는 단계(S1∼S3)와, 상기 단계(S1∼S3)의 조건이 만족되면 지연시간을 설정하여 ISC작동 듀티로 ISC작동을 행하도록 하는 단계(S4∼S5)와, 상기 지연시간후 SCV 작동 듀티로 SCV 작동을 행하도록 하는 단계(S6∼S8)와, 상기 단제(S8)에서 SCV 작동영역이 만족되는지를 판단하는 단계(S9)와, 상기 단계(S9)에서 SCV 작동영역이 만족되면 ISC 폐쇄듀티로 ISC를 폐쇄토록 하고 일정시간후 SCV 폐쇄 듀티로 SCV를 폐쇄토록 하는 단계(S10∼S14)와로 이루어짐을 특징으로 하는 와류 컨트롤 밸브의 듀티 제어방법.Determining whether the warm-up state, the rpm condition is satisfied, the load condition is satisfied (S 1 ~ S 3 ), and if the conditions of the step (S 1 ~ S 3 ) is satisfied, the delay time is set to the ISC operation duty the method comprising to effect operation (S 4 ~S 5) and, a step (S 6 ~S 8) that after the delay time to perform the operation as SCV SCV duty operation, the operating region in the SCV danje (S 8) is Determining whether it is satisfied (S 9 ), and if the SCV operating region is satisfied in step S 9 , closing the ISC with the ISC closing duty and closing the SCV with the SCV closing duty after a predetermined time (S 10). S 14 ), and the duty control method of the vortex control valve.
KR1019960073058A 1996-12-27 1996-12-27 Duty control method of the vortex control valve KR100272776B1 (en)

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KR100272776B1 true KR100272776B1 (en) 2000-11-15

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