KR100612969B1 - Method for reducing a torque output of an internal combustion engine - Google Patents

Method for reducing a torque output of an internal combustion engine Download PDF

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KR100612969B1
KR100612969B1 KR1020040073043A KR20040073043A KR100612969B1 KR 100612969 B1 KR100612969 B1 KR 100612969B1 KR 1020040073043 A KR1020040073043 A KR 1020040073043A KR 20040073043 A KR20040073043 A KR 20040073043A KR 100612969 B1 KR100612969 B1 KR 100612969B1
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South Korea
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cylinder
cylinder injection
probability
engine
probability threshold
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KR1020040073043A
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Korean (ko)
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KR20060024159A (en
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박진서
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현대자동차주식회사
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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
    • F02D41/30—Controlling fuel injection
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3064—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes
    • F02D41/307—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes to avoid torque shocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/06—Cutting-out cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/02—Cutting-out
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

본 발명은 엔진의 출력 토크 감소 요구시 실린더 컷 오프 스텝 입력을 확률 임계값으로 나타내어 실린더 분사 컷 오프를 결정하여 엔진의 토크를 감소시키는 엔진의 출력 토크 감소 방법에 관한 것으로, 실린더 컷 오프 스텝(cut-off step)을 입력하는 단계와; 입력된 실린더 컷 오프 스텝 입력값을 목표 출력(%)인 확률 임계값으로 변환하는 단계와; 제어하고자 하는 기통의 인젝터 구동을 온(On)했을 경우 출력(%)인 실린더 분사 확률 변수를 계산하는 단계와; 실린더 분사 확률 변수와 확률 임계값을 비교하는 단계와; 비교된 실린더 분사 확률 변수와 확률 임계값의 차이값에 따라 해당되는 실린더 분사 제어동작을 수행하는 단계를 포함하여 이루어진다.The present invention relates to a method for reducing the output torque of an engine to reduce the torque of the engine by determining the cylinder injection cutoff by indicating the cylinder cutoff step input as a probability threshold value when the output torque of the engine is requested. -off step); Converting the input cylinder cut-off step input value into a probability threshold value that is a target output (%); Calculating a cylinder injection probability variable that is an output (%) when the injector driving of the cylinder to be controlled is turned on; Comparing the cylinder injection probability variable and the probability threshold value; And performing a corresponding cylinder injection control operation according to the difference between the compared cylinder injection probability variable and the probability threshold value.

엔진, 토크, 분사, 확률, 제어Engine, torque, injection, probability, control

Description

엔진의 출력 토크 감소 방법{METHOD FOR REDUCING A TORQUE OUTPUT OF AN INTERNAL COMBUSTION ENGINE}TECHNICAL FOR REDUCING A TORQUE OUTPUT OF AN INTERNAL COMBUSTION ENGINE}

도 1은 본 발명의 실시예에 따른 엔진의 출력 토크 감소 방법을 도시한 흐름도.1 is a flowchart illustrating a method of reducing output torque of an engine according to an exemplary embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 엔진의 출력 토크 감소 방법을 구현시 실린더 컷 오프 패턴을 도시한 도면.2 is a view showing a cylinder cut-off pattern when implementing the method of reducing the output torque of the engine according to an embodiment of the present invention.

본 발명은 엔진의 출력 토크 감소 방법에 관한 것이다.The present invention relates to a method of reducing output torque of an engine.

통상적으로, 종래에는 엔진 출력 토크를 감소시키기 위해서 특정 패턴을 따라 연료 분사를 줄이거나 점화각과 점화시점을 조절하여 엔진 출력 토크를 감소시키는 방법을 사용하였다.Conventionally, in order to reduce the engine output torque, a method of reducing the engine output torque by reducing fuel injection or adjusting the ignition angle and the ignition point along a specific pattern has been used.

즉, 종래에는 토크 감소 요구에 따라 정해진 패턴의 분사 억제(Injection Suppression)를 임계값을 통해 결정하여 점화시점을 조절하였다. That is, in the related art, injection suppression of a predetermined pattern is determined through a threshold value according to a torque reduction request, thereby adjusting the ignition timing.

참고적으로, 임계값은 배기가스 온도, 촉매 컨버터(catalytic converter) 온도, 엔진 온도, 엔진 웜업(warm-up) 여부, 부하, 회전 주파수 중 하나 이상을 사용 하여 결정하였다.For reference, the threshold value was determined using one or more of exhaust gas temperature, catalytic converter temperature, engine temperature, engine warm-up, load, and rotational frequency.

본 발명의 목적은 엔진의 출력 토크 감소 요구시 실린더 컷 오프 스텝 입력을 확률 임계값으로 나타내어 실린더 분사 컷 오프를 결정하여 엔진의 토크를 감소시키는 엔진의 출력 토크 감소 방법을 제공하는데 있다.An object of the present invention is to provide a method for reducing the output torque of an engine that reduces the torque of the engine by determining the cylinder injection cutoff by indicating the cylinder cutoff step input as a probability threshold value when the output torque reduction request of the engine is requested.

상기와 같은 목적을 달성하기 위하여 본 발명은 엔진의 출력 토크 감소 방법에 있어서, 실린더 컷 오프 스텝(cut-off step)을 입력하는 단계와; 입력된 실린더 컷 오프 스텝 입력값을 목표 출력(%)인 확률 임계값으로 변환하는 단계와; 제어하고자 하는 기통의 인젝터 구동을 온(On)했을 경우 출력(%)인 실린더 분사 확률 변수를 계산하는 단계와; 실린더 분사 확률 변수와 확률 임계값을 비교하는 단계와; 비교된 실린더 분사 확률 변수와 확률 임계값의 차이값에 따라 해당되는 실린더 분사 제어동작을 수행하는 단계를 포함하여 이루어지는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a method for reducing the output torque of an engine, comprising: inputting a cylinder cut-off step; Converting the input cylinder cut-off step input value into a probability threshold value that is a target output (%); Calculating a cylinder injection probability variable that is an output (%) when the injector driving of the cylinder to be controlled is turned on; Comparing the cylinder injection probability variable and the probability threshold value; And performing a corresponding cylinder injection control operation according to the difference between the compared cylinder injection probability variable and the probability threshold value.

이하 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명한다. 하기 설명 및 첨부 도면과 같은 많은 특정 상세들이 본 발명의 보다 전반적인 이해를 제공하기 위해 나타나 있으나, 이들 특정 상세들은 본 발명의 설명을 위해 예시한 것으로 본 발명이 그들에 한정됨을 의미하는 것은 아니다. 그리고 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능 및 구성에 대한 상세한 설명은 생략한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

도 1은 본 발명의 실시예에 따른 엔진의 출력 토크 감소 방법을 도시한 흐름 도이다.1 is a flowchart illustrating a method of reducing output torque of an engine according to an exemplary embodiment of the present invention.

도 1을 참조하여, 본 발명의 실시예에 따른 엔진의 출력 토크 감소 방법을 설명한다.1, a method of reducing output torque of an engine according to an exemplary embodiment of the present invention will be described.

본 발명의 실시예는 토크 감소 요구시 실린더 컷 오프 스텝 입력을 확률 임계값으로 나타내어 실린더 분사 컷 오프(Injection cut-off)를 결정한다.An embodiment of the present invention indicates cylinder injection cut-off by representing a cylinder cut off step input as a probability threshold when torque reduction is requested.

먼저, 실린더 컷 오프 스텝(cut-off step)이 입력되면, 제어부(ECU)는 입력된 실린더 컷 오프 스텝 입력값을 목표 출력(%)인 확률 임계값으로 변환하는 단계를 수행한다(S110, S120).First, when a cylinder cut-off step is input, the control unit ECU converts the input cylinder cut-off step input value into a probability threshold value that is a target output% (S110, S120). ).

확률 임계값은 설정된 목표 출력(%)이며, 별도의 메모리에 저장된다.The probability threshold is a set target output (%) and is stored in a separate memory.

이어서, 제어부는 제어하고자 하는 기통의 인젝터 구동을 온(On)했을 경우 출력(%)인 실린더 분사 확률 변수를 계산한다(S130).Subsequently, the controller calculates a cylinder injection probability variable that is an output (%) when the injector driving of the cylinder to be controlled is turned on (S130).

그리고, (S140)으로 진행하여 실린더 분사 확률 변수와 확률 임계값을 비교한다.In operation S140, the cylinder injection probability variable is compared with the probability threshold value.

이어서, 비교된 실린더 분사 확률 변수와 확률 임계값의 차이값에 따라 해당되는 실린더 분사 제어동작을 수행한다.Subsequently, a corresponding cylinder injection control operation is performed according to the difference between the compared cylinder injection probability variable and the probability threshold value.

예를 들어, 제어부는 전술한 (S140)에서 실린더 분사 확률 변수가 확률 임계값 이하이면 (S150)으로 진행하여 실린더 분사 제어동작을 수행한다.For example, if the cylinder injection probability variable is less than or equal to the probability threshold in step S140 described above, the controller proceeds to step S150 to perform a cylinder injection control operation.

(실린더 분사 확률 변수 ≤ 확률 임계값) → 실린더 분사(Cylinder injection probability variable ≤ probability threshold) → cylinder injection

이와는 달리, 제어부는 전술한 (S140)에서 실린더 분사 확률 변수가 확률 임계값을 초과하면 (S160)으로 진행하여 실린더 분사 컷 오프 제어동작을 수행한다.Unlike this, if the cylinder injection probability variable exceeds the probability threshold in step S140 described above, the controller proceeds to step S160 to perform a cylinder injection cutoff control operation.

(실린더 분사 확률 변수 > 확률 임계값) → 실린더 분사 컷 오프(Cylinder injection probability variable> probability threshold) → cylinder injection cutoff

도 2는 본 발명의 실시예에 따른 엔진의 출력 토크 감소 방법을 구현시 실린더 컷 오프 패턴을 도시한 도면이다.2 is a view showing a cylinder cut-off pattern when implementing the method of reducing the output torque of the engine according to an embodiment of the present invention.

도 2를 참조하여 토크 감소 요구로 75%의 출력을 내고자 할 때(확률 임계값 : 75%)를 가정하여 설명한다.Referring to FIG. 2, it is assumed that the output of 75% is required as a torque reduction request (probability threshold value: 75%).

먼저, 1번 인젝터(Injector)를 온(ON)할 경우 100%출력이 된다.First, when injector 1 is turned ON, the output is 100%.

즉, 확률변수 : 100%Random variables: 100%

확률변수(100%) > 확률 임계값(75%) Probability Variable (100%)> Probability Threshold (75%)

1번 인젝터 컷 오프(Injector cut off) 결정Determining the number 1 injector cut off

한편, 3번 인젝터(Injector)를 온(ON)할 경우 50%출력이 된다.On the other hand, when the injector 3 is turned ON, the output becomes 50%.

즉, 확률변수 : 50%Random variables: 50%

확률변수(50%) ≤ 확률 임계값(75%) Random variable (50%) ≤ probability threshold (75%)

3번 인젝터 온(Injector On) 결정Determination of Injector On No. 3

4번 인젝터(Injector)를 온(ON)할 경우에는 66.7%출력이 된다.When the 4th injector is ON, the output is 66.7%.

즉, 확률변수 : 66.7%In other words, random variable: 66.7%

확률변수(66.7%) ≤ 확률 임계값(75%)Random variable (66.7%) ≤ probability threshold (75%)

4번 인젝터 온(Injector On) 결정4 Injector On Decision

2번 인젝터(Injector)를 온(ON)할 경우에는 75%출력이 된다.When the 2nd injector is ON, the output is 75%.

즉, 확률변수 : 75%Random variables: 75%

확률변수(75%) ≤ 확률 임계값(75%)Random variable (75%) ≤ probability threshold (75%)

2번 인젝터 온(Injector On) 결정Determination of Injector On No. 2

1번 인젝터(Injector)를 온(ON)할 경우 80%출력이 된다.When injector 1 is ON, 80% output is produced.

즉, 확률변수 : 80%Random variables: 80%

확률변수(80%) > 확률 임계값(75%) Probability Variables (80%)> Probability Threshold (75%)

1번 인젝터 컷 오프(Injector cut off)결정Determination of No. 1 injector cut off

3번 인젝터(Injector)를 온(ON)할 경우 66.7%출력이 된다.When injector 3 is ON, 66.7% output is provided.

즉, 확률변수 : 66.7%In other words, random variable: 66.7%

확률변수(66.7%) ≤ 확률 임계값(75%) Random variable (66.7%) ≤ probability threshold (75%)

3번 인젝터 온(Injector On)결정3 Injector On Decision

4번 인젝터(Injector)를 온(ON)할 경우 71.4%출력이 된다.When the 4th injector is ON, the output is 71.4%.

즉, 확률변수 : 71.4%In other words, random variable: 71.4%

확률변수(71.4%) ≤ 확률 임계값(75%) Random variable (71.4%) ≤ probability threshold (75%)

4번 인젝터 온(Injector On)결정4 Injector On Decision

상술한 바와 같이 본 발명에 따른 엔진의 출력 토크 감소 방법은 토크 감소 요구시 확률 임계값으로 나타내어 실린더 분사 컷 오프 결정을 할 수 있는 효과가 있다.As described above, the method of reducing the output torque of the engine according to the present invention has an effect of determining a cylinder injection cutoff by indicating a probability threshold value when a torque reduction request is made.

Claims (3)

엔진의 출력 토크 감소 방법에 있어서,In the method of reducing the output torque of the engine, 실린더 컷 오프 스텝(cut-off step)을 입력하는 단계와;Inputting a cylinder cut-off step; 입력된 실린더 컷 오프 스텝 입력값을 목표 출력(%)인 확률 임계값으로 변환하는 단계와;Converting the input cylinder cut-off step input value into a probability threshold value that is a target output (%); 제어하고자 하는 기통의 인젝터 구동을 온(On)했을 경우 출력(%)인 실린더 분사 확률 변수를 계산하는 단계와;Calculating a cylinder injection probability variable that is an output (%) when the injector driving of the cylinder to be controlled is turned on; 실린더 분사 확률 변수와 확률 임계값을 비교하는 단계와;Comparing the cylinder injection probability variable and the probability threshold value; 비교된 실린더 분사 확률 변수와 확률 임계값의 차이값에 따라 해당되는 실린더 분사 제어동작을 수행하는 단계를 포함하여 이루어지는 것을 특징으로 하는 엔진의 출력 토크 감소 방법.And performing a corresponding cylinder injection control operation according to the difference between the compared cylinder injection probability variable and the probability threshold value. 제1항에 있어서, The method of claim 1, 실린더 분사 확률 변수가 확률 임계값 이하이면 실린더 분사 제어동작을 수행하는 것을 징으로 하는 엔진의 출력 토크 감소 방법.And performing a cylinder injection control operation when the cylinder injection probability variable is less than or equal to the probability threshold. 제1항에 있어서, The method of claim 1, 실린더 분사 확률 변수가 확률 임계값을 초과하면 실린더 분사 컷 오프 제어동작을 수행하는 것을 징으로 하는 엔진의 출력 토크 감소 방법.A method of reducing the output torque of an engine by performing a cylinder injection cut off control operation when a cylinder injection probability variable exceeds a probability threshold.
KR1020040073043A 2004-09-13 2004-09-13 Method for reducing a torque output of an internal combustion engine KR100612969B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001289078A (en) 2000-04-07 2001-10-19 Toyota Motor Corp Internal combustion engine with solenoid driven valve
KR100413019B1 (en) 1994-10-06 2004-05-07 로베르트 보쉬 게엠베하 Internal combustion engine control method and apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100413019B1 (en) 1994-10-06 2004-05-07 로베르트 보쉬 게엠베하 Internal combustion engine control method and apparatus
JP2001289078A (en) 2000-04-07 2001-10-19 Toyota Motor Corp Internal combustion engine with solenoid driven valve

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