KR940015214A - Idle speed adjustment system - Google Patents

Idle speed adjustment system Download PDF

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Publication number
KR940015214A
KR940015214A KR1019920025049A KR920025049A KR940015214A KR 940015214 A KR940015214 A KR 940015214A KR 1019920025049 A KR1019920025049 A KR 1019920025049A KR 920025049 A KR920025049 A KR 920025049A KR 940015214 A KR940015214 A KR 940015214A
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KR
South Korea
Prior art keywords
fuel
fuel pressure
idle speed
engine
calculate
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Application number
KR1019920025049A
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Korean (ko)
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KR0145685B1 (en
Inventor
이우직
Original Assignee
전성원
현대자동차 주식회사
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Priority to KR1019920025049A priority Critical patent/KR0145685B1/en
Publication of KR940015214A publication Critical patent/KR940015214A/en
Application granted granted Critical
Publication of KR0145685B1 publication Critical patent/KR0145685B1/en

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Classifications

    • 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

Abstract

다점 연료분사방식의 엔진에서 나타나는 각 실린더간의 공연비 차이를 해결함으로써 엔진 부조현상을 방지하고자, 흡기 매니홀드(4)에 연통된 서어지탱크(3)로 별도의 보조인젝터(16)을 장착시키고, ECU(14)에 의해 개폐제어되는 3상밸브(19)를 개재하여 상기한 보조인젝터(16)로 연료를 급송함과 아울러 이 보조인젝터(16)의 보조연료관(17)에 설치된 연료압센서(18)를 통해 급송되는 연료압의 검출신호가 상기한 ECU(14)에 입력되게 하고, ECU(14)는 엔진(8)이 공전상태인 때에 보조인젝터(16)만이 연료를 분사하도록 제어하면서 규정공전속도로 엔진(8)이 가동되도록 규정공전속도 N과 실제공전속도 Na를 연산하여 얻은 수정치 dn에 관한 연료압의 비례적분 제어량 Pc을 결정하고, 규정공전속도 N에 대응하는 예상연료압 Pp와 상기한 비례적분제어량 Pc를 연산하여 참고연료압 Pr을 구한 다음, 이 참고연료압 Pr에서 연료압센서(18)를 통해 검출된 실제연료압 Pa을 연산하여 추가 연료압 dP를 구하고, 이 추가연료압 dP가 0이 되도록 예상연료압 Pp를 결정하면서 연료공급량을 증감조절한 다음, 조절된 연료공급량의 증감에 따른 추가요구공기량 dQ를 얻기 위하여 참고공기량 Qr에서 실제공기량 Qa을 연산하고, 이 추가요구공기량 dQ가 0으로 될때 까지 참고공기량 Qr을 반복 결정함으로써 상기한 보조인젝터(16)에 의존하여 연료를 공급받는 엔진(8)이 이론공연비에 일치하는 공전속도로 가동되게 하는 공전속도 조절시스템.A separate auxiliary injector 16 is mounted to the surge tank 3 connected to the intake manifold 4 to prevent engine coordination by solving the difference in air-fuel ratio between cylinders in the multi-point fuel injection system. A fuel pressure sensor installed in the auxiliary fuel pipe 17 of the auxiliary injector 16 while feeding fuel to the auxiliary injector 16 via the three-phase valve 19 controlled by the ECU 14. The detection signal of the fuel pressure fed through 18 is inputted to the ECU 14 described above, and the ECU 14 controls only the auxiliary injector 16 to inject fuel when the engine 8 is idle. Determine the proportional integral control amount Pc of the fuel pressure with respect to the correction value dn obtained by calculating the specified idle speed N and the actual idle speed Na so that the engine 8 operates at the specified idle speed, and predicted fuel pressure corresponding to the prescribed idle speed N. Calculate Pp and the above proportional integral control amount Pc for reference After calculating the fuel pressure Pr, an additional fuel pressure dP is calculated by calculating the actual fuel pressure Pa detected by the fuel pressure sensor 18 at this reference fuel pressure Pr, and the estimated fuel pressure Pp is set so that the additional fuel pressure dP becomes zero. To determine the additional demand air volume dQ according to the increase or decrease of the regulated fuel supply, calculate the actual air quantity Qa from the reference air quantity Qr and determine the reference air quantity Qr until the additional demand air quantity dQ becomes zero. The idle speed regulation system which makes it possible to operate the engine 8 which is supplied with fuel depending on the auxiliary injector 16 at the idle speed which matches the theoretical fuel ratio by repeating the above determination.

Description

공전속도 조정시스템Idle speed adjustment system

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

제2도는 본 발명에 관련된 엔진 컴퓨터 제어방식에 관련된 예를 나타내는 개략구성도, 제3도는 본 발명에 관련된 프로그램의 플로우챠트.2 is a schematic configuration diagram showing an example related to an engine computer control method according to the present invention, and FIG. 3 is a flowchart of a program according to the present invention.

Claims (1)

엔진의 각 실린더마다 개별의 인젝터가 장착되어서 연료를 분사하는 다점 연료분사방식의 컴퓨터 제어 엔진에 있어서, 흡기 매니홀드(4)에 연통된 서어지탱크(3)로 보조인젝터(16)을 장착시키고, ECU(14)에 의해 개폐제어되는 3상밸브(19)를 개재하여 상기한 보조인젝터(16)로 연료를 급송함과 아울러 이 보조인젝터(16)의 보조연료관(17)에 설치된 연료압센서(18)를 통해 급송되는 연료압의 검출신호가 상기한 ECU(14)에 입력되게 하고, ECU(14)는 엔진(8)이 공전상태인 때에 보조인젝터(16)만이 연료를 분사하도록 제어하면서 규정공전속도로 엔진(8)이 가동되도록 규정공전속도 N과 실제공전속도 Na를 연산하여 얻은 수정치 dn에 관한 연료압의 비례적분 제어량 Pc을 결정하고, 규정공전속도 N에 대응하는 예상연료압 Pp와 상기한 비례적분제어량 Pc를 연산하여 참고연료압 Pr을 구한 다음, 이 참고연료압 Pr에서 연료압센서 (18)를 통해 검출된 실제연료압 Pa을 연산하여 추가 연료압 dP를 구하고, 이 추가연료압 dP가 0이 되도록 예상연료압 Pp를 결정하면서 연료공급량을 증감조절한 다음, 조절된 연료공급량의 증감에 따른 추가요구공기량 dQ를 얻기 위하여 참고공기량 Qr에서 실제공기량 Qa을 연산하고, 이 추가요구공기량 dQ가 0으로 될때 까지 참고공기량 Qr을 반복 결정하여 이론공연비에 일치하는 공전속도를 얻을 수 있게 함을 특징으로 하는 공전속도 조절시스템.In a computer controlled engine of a multi-point fuel injection method in which a separate injector is mounted for each cylinder of the engine to inject fuel, the auxiliary injector 16 is mounted by a surge tank 3 connected to the intake manifold 4. Fuel is supplied to the auxiliary injector 16 via the three-phase valve 19 controlled by the ECU 14, and the fuel pressure installed in the auxiliary fuel pipe 17 of the auxiliary injector 16. The detection signal of the fuel pressure fed through the sensor 18 is inputted to the ECU 14 described above, and the ECU 14 controls only the auxiliary injector 16 to inject fuel when the engine 8 is idle. While determining the proportional integral control amount Pc of the fuel pressure with respect to the correction value dn obtained by calculating the specified idle speed N and the actual idle speed Na so that the engine 8 is operated at the specified idle speed, and predicted fuel corresponding to the prescribed idle speed N Calculate the pressure Pp and the above proportional integral control amount Pc. Calculate the pressure Pr and calculate the additional fuel pressure dP by calculating the actual fuel pressure Pa detected by the fuel pressure sensor 18 at this reference fuel pressure Pr, and calculate the estimated fuel pressure Pp so that this additional fuel pressure dP becomes 0. While determining the fuel supply, increase and decrease the fuel supply, calculate the actual air flow Qa from the reference air flow Qr to obtain the additional demand air flow dQ according to the increase or decrease of the fuel supply, and adjust the reference air supply Qr until the additional demand air flow dQ becomes 0 A revolving speed control system, characterized in that it can be determined repeatedly to obtain a revolving speed that matches the theoretical performance ratio. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025049A 1992-12-22 1992-12-22 Idle speed control system on internal combustion engine KR0145685B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920025049A KR0145685B1 (en) 1992-12-22 1992-12-22 Idle speed control system on internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920025049A KR0145685B1 (en) 1992-12-22 1992-12-22 Idle speed control system on internal combustion engine

Publications (2)

Publication Number Publication Date
KR940015214A true KR940015214A (en) 1994-07-20
KR0145685B1 KR0145685B1 (en) 1998-08-17

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Application Number Title Priority Date Filing Date
KR1019920025049A KR0145685B1 (en) 1992-12-22 1992-12-22 Idle speed control system on internal combustion engine

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KR0145685B1 (en) 1998-08-17

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