KR100230927B1 - A control device for amount of fuel injection at starting - Google Patents

A control device for amount of fuel injection at starting Download PDF

Info

Publication number
KR100230927B1
KR100230927B1 KR1019940037018A KR19940037018A KR100230927B1 KR 100230927 B1 KR100230927 B1 KR 100230927B1 KR 1019940037018 A KR1019940037018 A KR 1019940037018A KR 19940037018 A KR19940037018 A KR 19940037018A KR 100230927 B1 KR100230927 B1 KR 100230927B1
Authority
KR
South Korea
Prior art keywords
fuel injection
knest
injection amount
engine speed
speed correction
Prior art date
Application number
KR1019940037018A
Other languages
Korean (ko)
Other versions
KR960023762A (en
Inventor
장경석
Original Assignee
류정열
기아자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 류정열, 기아자동차주식회사 filed Critical 류정열
Priority to KR1019940037018A priority Critical patent/KR100230927B1/en
Publication of KR960023762A publication Critical patent/KR960023762A/en
Application granted granted Critical
Publication of KR100230927B1 publication Critical patent/KR100230927B1/en

Links

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
    • F02D41/30—Controlling fuel injection
    • 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
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting

Landscapes

  • 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)

Abstract

본 발명은 내연기관의 시동시 분사되는 연료량을 제어하는 장치에 관한 것으로서, 시동시 연료분사량을 가장 적합하게 보정하도록 하기 위해, 시동시 기본연료분사량(TAUSTB)과 엔진회전수 보정계수(KNESTB)의 누적으로써 시동시 연료분사량(TAUST)을 산정하고, 이 산정값을 연료분사밸브의 제어장치에 입력해서 연료분사량의 제어를 하는 것에 있어서 ; 상기 엔진회전수 보정계수(KNESTB)에 엔진냉각수온(THW)이 높은 만큼 낮아지는 값(최저1)을 가지는 가이드값(KNEST MAX)을 설정하는 가이드값설정수단이 부가되는 시동시 연료분사량 제어장치이다.The present invention, start-up KNEST (basic fuel injection quantity (TAUST B) and the engine speed correction factor to ensure that the optimal correcting the fuel injection quantity at start-up B relates to a device for controlling the amount of fuel injection during startup of the internal combustion engine To calculate the fuel injection amount (TAUST) at start-up and to input the calculated value into the control device of the fuel injection valve to control the fuel injection amount; Fuel injection amount control at start to which a guide value setting means for setting a guide value (KNEST MAX) having a value (lowest 1) in which the engine coolant temperature (THW) is lowered as high as the engine speed correction coefficient (KNEST B ) is added. Device.

Description

시동시 연료분사량 제어장치Fuel injection quantity control device at start

제1도는 본 발명의 연료분사량 산출 순서를 나타내는 플로우챠트.1 is a flowchart showing the fuel injection amount calculation procedure of the present invention.

제2도는 본 발명의 시동시 기본연료분사량(TAUSTB)과 엔진냉각수온(THW)의 관계를 나타내는 그래프.2 is a graph showing the relationship between the basic fuel injection amount (TAUST B ) and the engine cooling water temperature (THW) at the start of the present invention.

제3도는 본 발명의 엔진회전수 보정계수(KNESTB)와 엔진회전수(NE)의 관계를 나타내는 그래프.3 is a graph showing the relationship between the engine speed correction coefficient KNEST B and the engine speed NE of the present invention.

제4도는 본 발명의 가이드값(KNEST MAX)과 엔진냉각수온(THW)의 관계를 나타내는 그래프.4 is a graph showing the relationship between the guide value (KNEST MAX) and the engine cooling water temperature (THW) of the present invention.

본 발명은 내연기관의 시동시 분사되는 연료량을 제어하는 장치에 관한 것으로서, 특히 엔진의 냉각수온에 의해 가변되는 연료의 벽면부착량과 기화율및 실제압축비 등을 고려해서, 시동시 연료분사량을 가장 적합하게 보정하도록 하는 시동시 연료분사량 제어장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the amount of fuel injected at the start of an internal combustion engine. It relates to a fuel injection amount control device for starting to correct.

이하 첨부된 도면에 의해 본 발명의 기술적 구성을 상세히 설명하면 다음과 같다.Hereinafter, the technical configuration of the present invention with reference to the accompanying drawings in detail.

본 발명은 시동시 기본연료분사량(TAUSTB)과 엔진회전수 보정계수(KNESTB)의 누적으로써 시동시 연료분사량(TAUST)을 산정하고, 이 산정값을 연료분사밸브의 제어장치에 입력해서 연료분사량의 제어를 하는 시동시 연료분사량 제어장치에 있어서 ; 상기 엔진회전수 보정계수(KNESTB)에 엔진냉각수온(THW)이 높은 만큼 낮아지는 값(최저1)을 가지는 가이드값(KNEST MAX)을 설정하는 가이드값설정수단이 부가되도록 구성함을 그 기술적 구성상의 기본 특징으로 한다.The present invention calculates the fuel injection amount (TAUST) at start-up by accumulating the basic fuel injection amount (TAUST B ) and the engine speed correction coefficient (KNEST B ) at start-up, and inputs the calculated value to the control device of the fuel injection valve to provide fuel. In the fuel injection quantity control device at start-up to control the injection amount; And a guide value setting means for setting a guide value (KNEST MAX) having a value (lowest 1) in which the engine coolant temperature (THW) is lowered as high as the engine speed correction coefficient (KNEST B ). It is a basic characteristic on configuration.

이와같이 구성되는 본 발명은, 제1도에 도시되는 플로우챠트의 순서에 의해 시동시 연료분사량을 산출하게 되며, 상세히 설명하면 다음과 같다.According to the present invention configured as described above, the fuel injection amount at start-up is calculated according to the procedure of the flowchart shown in FIG.

먼저, 시동시 기본연료분사량(TAUSTB)과 엔진냉각수온(THW)의 관계를 나타내는 제2도의 그래프에서, 엔진냉각수온(THW)으로부터 시동시 기본연료분사량(TAUSTB)을 구하고, 제2단계로, 엔진회전수 보정계수(KNESTB)와 엔진회전수(NE)의 관계를 나타내는 제3도의 그래프에 의해, 엔진회전수(NE)로부터 엔진회전수 보정계수(KNESTB)를 구하며, 제3단계로, 가이드값(KNEST MAX)과 엔진냉각수온(THW)의 관계를 나타내는 제4도의 그래프에 의해, 엔진냉각수온(THW)으로부터 가이드값(KNEST MAX)을 구한다.First, in the graph of FIG. 2 showing the relationship between the basic fuel injection amount TAUST B at start-up and the engine cooling water temperature THW, the basic fuel injection amount TAUST B at start-up is calculated from the engine cooling water temperature THW. From the engine speed NE, the engine speed correction coefficient KNEST B is obtained from the graph of FIG. 3 showing the relationship between the engine speed correction coefficient KNEST B and the engine speed NE. In the step, the guide value KNEST MAX is obtained from the engine cooling water temperature THW by the graph of FIG. 4 showing the relationship between the guide value KNEST MAX and the engine cooling water temperature THW.

다음, 제4단계로 엔진회전수 보정계수(KNESTB)와 가이드값(KNEST MAX)을 비교해서 엔진회전수 보정계수(KNESTB)가 가이드값(KNEST MAX) 보다 적은 경우, 제5단계로 KNEST=KNESTB로하고, 또한 엔진회전수 보정계수(KNESTB)가 가이드값(KNEST MAX) 보다 크거나 같을 경우, 제6단계로 KNEST=KNEST MAX로 해서, 여기서 엔진회전수 보정계수(KNEST)의 상한값 규제를 한다.Next, when the engine speed correction coefficient KNEST B is smaller than the guide value KNEST MAX by comparing the engine speed correction coefficient KNEST B with the guide value KNEST MAX in the fourth step, KNEST is performed in the fifth step. = KNEST B , and if the engine speed correction factor (KNEST B ) is greater than or equal to the guide value (KNEST MAX), then set KNEST = KNEST MAX in the sixth step, where the engine speed correction coefficient (KNEST) Regulate the upper limit.

다음, 제7단계로 시동시 기본연료분사량(TAUSTB)과 엔진회전수 보정계수(KNEST)에서 시동시 연료분사량(TAUST)를 산정해서 완료한다. 이 경우 엔진회전수 보정계수(KNEST)의 상한값 규제는 구체적으로 수온이 10℃~20℃ 이상에서 효력이 발생하도록 설정한다.Next, the fuel injection amount TAUST at start is calculated and completed from the basic fuel injection amount TAUST B at start-up and the engine speed correction factor KNEST. In this case, the upper limit of the engine speed correction coefficient KNEST is specifically set so that the water temperature takes effect at 10 ° C to 20 ° C or higher.

이러한 본 발명은, 시동후 엔진냉각수온(THW)이 상승함에 따라서 엔진회전수 보정계수의 가이드값(KNEST MAX)은 감소하여, 큰 보정계수를 취하지 않아도 되도록 엔진회전수 보정계수에, 엔진냉각수온에 의해 가변되는 연료의 벽면부착량과 기화율및 실제압축비의 영향을 반영시켜, 시동시 가장 적합한 연료분사량을 보정할 수 있도록 한다.In the present invention, as the engine cooling water temperature (THW) increases after starting, the guide value (KNEST MAX) of the engine speed correction coefficient decreases, so that the engine cooling water temperature does not depend on the large correction coefficient. By reflecting the influence of the wall deposition amount, the vaporization rate and the actual compression ratio of the fuel to be changed by the to be able to correct the most suitable fuel injection amount at start-up.

이상에서 살펴본 바와 같이, 본 발명은 엔진회전수 보정계수(KNESTB)에 엔진냉각수온(THW)이 높은 만큼 낮아지는 값을 가지는 가이드값(KNEST MAX)을 설정하는 가이드값설정수단이 부가되어, 엔진냉각수온에 의해 가변되는 연료벽면부착량과 기화율및 실제압축비의 영향이 반영되도록 하여, 시동시 연료분사량을 최적의 상태로 보정하도록 하는 매우 유용한 것이다.As described above, the present invention includes a guide value setting means for setting a guide value (KNEST MAX) having a value lowered by the engine coolant temperature (THW) to the engine speed correction coefficient (KNEST B ), It is very useful to correct the fuel injection amount at the start-up by reflecting the influence of the fuel wall deposition amount and the vaporization rate and the actual compression ratio which are varied by the engine cooling water temperature.

Claims (1)

시동시 기본 연료분사량(TAUSTB)과 엔진회전수 보정계수(KNESTB)의 누적으로서 시동시 연료분사량(TAUST)을 산정하고, 이 산정값을 연료분사밸브의 제어장치에 입력해서 연료분사량의 제어를 하는 것에 있어서, 상기 엔진 회전수 보정계수(KNESTB)에 엔진냉각수온(THW)값이 높을수록 낮아지는 가이드값(KNEST MAX)을 부가하여 제어할 수 있도록 하는 시동시 연료분사량 제어장치.Calculate the fuel injection amount (TAUST) at start-up by accumulating the basic fuel injection amount (TAUST B ) and engine speed correction coefficient (KNEST B ) at start-up, and input the calculated value to the control device of the fuel injection valve to control the fuel injection amount. The fuel injection amount control device at start to control the engine speed correction coefficient (KNEST B ) by adding a guide value (KNEST MAX) that is lowered as the engine coolant temperature (THW) value is higher.
KR1019940037018A 1994-12-27 1994-12-27 A control device for amount of fuel injection at starting KR100230927B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940037018A KR100230927B1 (en) 1994-12-27 1994-12-27 A control device for amount of fuel injection at starting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940037018A KR100230927B1 (en) 1994-12-27 1994-12-27 A control device for amount of fuel injection at starting

Publications (2)

Publication Number Publication Date
KR960023762A KR960023762A (en) 1996-07-20
KR100230927B1 true KR100230927B1 (en) 1999-12-01

Family

ID=19403716

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940037018A KR100230927B1 (en) 1994-12-27 1994-12-27 A control device for amount of fuel injection at starting

Country Status (1)

Country Link
KR (1) KR100230927B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100351100B1 (en) * 1999-09-15 2002-09-09 기아자동차주식회사 Method for controlling injecting amount of fuel when engine is started of an electronic controlled fuel injection system for a motor vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100351100B1 (en) * 1999-09-15 2002-09-09 기아자동차주식회사 Method for controlling injecting amount of fuel when engine is started of an electronic controlled fuel injection system for a motor vehicle

Also Published As

Publication number Publication date
KR960023762A (en) 1996-07-20

Similar Documents

Publication Publication Date Title
US7591243B2 (en) Fuel injection control apparatus and method for direct injection internal combustion engine
JP2018131957A (en) Fuel injection control device
JPH04224244A (en) Air fuel ratio control device of engine
US7240671B2 (en) Device for correcting fuel injection amount of internal combustion engine, and control apparatus for internal combustion engine employing the device
KR100230927B1 (en) A control device for amount of fuel injection at starting
US4793312A (en) Fuel supply control arrangement for an internal combustion engine
JP2007023904A (en) Control device of internal combustion engine
US8161941B2 (en) Control device for internal combustion engine
JP2018188992A (en) Control device of internal combustion engine
JP4144626B2 (en) Control device for internal combustion engine
JP4423801B2 (en) Fuel injection control device for in-cylinder internal combustion engine
JPH0270953A (en) Method and device for controlling fuel injection for internal combustion engine
JP3855557B2 (en) Control device for internal combustion engine
JPH1061467A (en) Method for determining fuel excessive amount supplied to internal combustion engine in warming up operation
KR19980047787A (en) Fuel injection quantity control method when starting a vehicle
JPH03488B2 (en)
KR0161769B1 (en) Fuel feed control device for internal combustion engine
JPH11182395A (en) Ignition timing controller of internal combustion engine
KR970044667A (en) Fuel injection quantity control device at start
KR100427066B1 (en) Cooling start improving method
JPH11343907A (en) Idle engine speed controlling method and device therefor
JP4211789B2 (en) Control device for internal combustion engine
JP2862688B2 (en) Idle speed control method for internal combustion engine
JP2807557B2 (en) Fuel control method after engine start
JPS61201842A (en) Control device for rarefied air-fuel ratio during idling of internal-combustion engine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee