KR101376779B1 - Control apparatus of engine for vehicle and control method of the same - Google Patents

Control apparatus of engine for vehicle and control method of the same Download PDF

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KR101376779B1
KR101376779B1 KR1020130006902A KR20130006902A KR101376779B1 KR 101376779 B1 KR101376779 B1 KR 101376779B1 KR 1020130006902 A KR1020130006902 A KR 1020130006902A KR 20130006902 A KR20130006902 A KR 20130006902A KR 101376779 B1 KR101376779 B1 KR 101376779B1
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South Korea
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air amount
cda
intake air
engine
throttle valve
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KR1020130006902A
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Korean (ko)
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이현규
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주식회사 현대케피코
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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
    • 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
    • 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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • 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
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • F02D2041/0012—Controlling intake air for engines with variable valve actuation with selective deactivation of cylinders
    • 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
    • F02D41/0002—Controlling intake air
    • 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

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  • 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)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to an engine control apparatus and method for a vehicle engine having a cylinder de-activation (CDA) function which can accurately measure an intake air amount, regardless of a fluctuation in the engine having the CDA function. The engine control apparatus includes a pressure sensor for measuring air pressure in an intake manifold; an opening rate detection unit for an opening rate of a throttle valve adjusting the air amount fed to the intake manifold; an operation unit for calculating a first intake air amount using the air pressure measured by the pressure sensor, and calculating a second intake air amount using the opening rate of the throttle valve measured by the opening rate detection unit, engine revolutions, and pressure at front and rear ends of the throttle valve; a CDA unit for stopping any one of a plurality of combustion chambers; and a control unit for controlling operation of the CDA unit. The control unit controls the engine using the first intake air amount calculated by the pressure sensor as the intake air amount fed to the engine if the CDA unit is stopped, and controls the engine using the second intake air amount calculated by the opening rate of the throttle valve as the intake air amount if the CDA unit operates. [Reference numerals] (AA) Start; (BB,DD) NO; (CC,EE) YES; (S10) Detect drive information; (S21) First intake air amount = second intake air amount?; (S22) Compensate second intake air amount; (S30) CDA unit operates?; (S40) Convert second intake air amount into intake air amount value; (S50) Convert first intake air amount into intake air amount value

Description

ＣＤＡ기능을 갖는 차량의 엔진 제어 장치 및 제어방법 { CONTROL APPARATUS OF ENGINE FOR VEHICLE AND CONTROL METHOD OF THE SAME }CONTROL APPARATUS OF VEHICLE AND CONTROL METHOD OF THE SAME}

본 발명은 CDA기능을 갖는 차량의 엔진 제어 장치 및 제어방법에 관한 것으로서, 특히 CDA 기능을 갖는 엔진에서 맥동에 관계없이 흡입공기량을 정확하게 측정하도록 할 수 있는 CDA기능을 갖는 차량의 엔진 제어 장치 및 제어방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine control apparatus and a control method of a vehicle having a CDA function. In particular, an engine control apparatus and a control apparatus of a vehicle having a CDA function capable of accurately measuring intake air amount regardless of pulsation in an engine having a CDA function. It is about a method.

최근 들어 자동차의 동력원으로 사용되는 유가의 급등에 따라 엔진의 개발에서 연비 향상 기술이 가장 큰 분야로 주목받고 있다.Recently, the fuel efficiency improvement technology has been attracting attention as the largest field in the development of engines due to the surge in oil prices used as a power source of automobiles.

엔진에 적용되는 CDA(Cylinder De-Activation)장치는 요구 동력이 낮은 아이들 조건이나 저부하의 조건에서 일부 연소실의 작동을 중지시켜 연료 소모가 최소화되도록 하는 것이다.The CDA (Cylinder De-Activation) device in the engine is designed to shut down some combustion chambers in low idle conditions or under low load conditions to minimize fuel consumption.

V8 엔진이 탑재된 차량의 경우 주행상태에서 제동이나 낮은 아이들 조건, 혹은 저부하의 조건에서는 모든 연소실을 작동시켜 동력을 발생시킬 이유가 없으므로, 각 뱅크에서 2개 연소실의 작동은 정지(휴지)시키고 나머지 2개씩(총 4개)의 연소실을 통해 동력을 발생시켜 연비의 향상을 도모하는 것이 바로 CDA장치이다.In the case of vehicles equipped with V8 engines, there is no reason to operate all the combustion chambers to generate power under braking, low idling or low load conditions while driving, so the operation of the two combustion chambers in each bank is stopped (rested). It is the CDA device that improves fuel economy by generating power through the remaining two combustion chambers (four in total).

또한, V6 엔진에서는 한쪽 뱅크의 3개 연소실을 모두 정지(휴지)시키고, 나머지 다른 한쪽 뱅크의 연소실을 통해 동력을 발생시킨다.In the V6 engine, all three combustion chambers in one bank are stopped (rested), and power is generated through the combustion chambers in the other bank.

상기한 기술에 의해 CDA 제어가 실행되면 정지(휴지)된 연소실에 연료 분사가 이루어지지 않아 연료 소비량이 줄어들고, 정지되어 있는 실린더에서는 마찰에 의한 동력손실이 발생하지 않으므로 상당한 수준의 연비이득을 얻을 수 있게 된다.When the CDA control is executed by the above technique, fuel consumption is not reduced because no fuel injection is made to the stopped (stopped) combustion chamber, and a significant fuel efficiency gain can be obtained because the power loss due to friction does not occur in the stopped cylinder. Will be.

그러나, 이러한 CDA장치가 장착된 엔진의 경우에는, CDA기능이 동작되는 경우 실린더(연소실) 내로 흡입되는 공기량의 불연속 및 불균등 실린더 흡기 행정으로 인해 흡입 압력센서 신호의 맥동이 크게 발생하는 문제가 있다.However, in the case of an engine equipped with such a CDA device, when the CDA function is operated, there is a problem in that the pulsation of the intake pressure sensor signal is greatly generated due to the discontinuous and uneven cylinder intake stroke of the amount of air sucked into the cylinder (combustion chamber).

즉, CDA기능이 동작되지 않을 경우에는 다수개의 실린더로 흡입되는 공기량이 일정하여 맥동이 거의 없지만, CDA기능이 동작할 경우에는 다수개의 실린더 중 일부는 닫히게 되어 개방된 실린더로 공급되는 공기량이 일정하지 않고 불연속적이며 이로 인해 흡기매니폴드 내부에 맥동이 발생하여 MAP센서(Manifold Absolute Pressure)가 흡기매니폴드의 공기압력을 정확하게 측정할 수 없어 부정확한 공기량값을 가지고 엔진을 제어하게 되는 문제가 있다.That is, when the CDA function is not operated, the amount of air sucked into the plurality of cylinders is constant and there is almost no pulsation. However, when the CDA function is operated, some of the plurality of cylinders are closed and the amount of air supplied to the open cylinder is not constant. This causes the pulsation to occur inside the intake manifold, so that the MAP sensor (Manifold Absolute Pressure) cannot accurately measure the air pressure of the intake manifold, thereby controlling the engine with an incorrect air volume value.

대한민국공개특허공보 제10-2009-0126619호Republic of Korea Patent Publication No. 10-2009-0126619

본 발명은 전술한 문제점을 해결하기 위한 것으로써, CDA기능을 갖는 엔진에서 CDA기능이 동작되는 경우 스로틀밸브의 개도를 이용하여 계산한 흡입공기량값을 가지고 엔진을 제어하도록 하는 CDA기능을 갖는 차량의 엔진 제어 장치 및 제어방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, in which the CDA function is operated in an engine having a CDA function, the vehicle having a CDA function to control the engine with the intake air amount calculated using the opening degree of the throttle valve. An object of the present invention is to provide an engine control apparatus and a control method.

상기 목적을 달성하기 위하여 본 발명의 CDA기능을 갖는 차량의 엔진 제어 장치는, 흡기매니폴드 내부의 공기압력을 측정하는 압력센서와; 상기 흡기매니폴드로 공급되는 공기량을 조정하는 스로틀밸브의 개도를 검출하는 개도검출부와; 상기 압력센서에 의해 측정된 공기압력을 이용하여 제1흡입공기량을 계산하고, 상기 개도검출부에 의해 측정된 스로틀밸브 개도 및 엔진회전수, 스로틀밸브 전후단의 압력을 이용하여 제2흡입공기량을 계산하는 연산부와; 다수개의 연소실 중 일부를 정지시키는 CDA(Cylinder De-Activation)부와; 상기 CDA부의 작동을 제어하는 제어부를 포함하여 이루어지되, 상기 제어부는, 상기 CDA부가 정지된 경우 상기 압력센서를 이용하여 계산된 상기 제1흡입공기량을 엔진에 공급되는 흡입공기량으로 사용하여 엔진을 제어하고, 상기 CDA부가 작동될 경우 상기 스로틀밸브의 개도를 이용하여 계산된 상기 제2흡입공기량을 엔진에 공급되는 흡입공기량으로 사용하여 엔진을 제어하는 것을 특징으로 한다.In order to achieve the above object, the engine control apparatus of a vehicle having the CDA function of the present invention includes a pressure sensor for measuring the air pressure inside the intake manifold; An opening degree detection section for detecting an opening degree of a throttle valve for adjusting an amount of air supplied to the intake manifold; The first intake air amount is calculated using the air pressure measured by the pressure sensor, and the second intake air amount is calculated using the throttle valve opening degree, the engine speed, and the pressure before and after the throttle valve measured by the opening degree detection unit. A calculating unit; A CDA (Cylinder De-Activation) unit for stopping some of the plurality of combustion chambers; And a control unit for controlling the operation of the CDA unit, wherein the control unit controls the engine by using the first intake air amount calculated using the pressure sensor as the intake air amount supplied to the engine when the CDA unit is stopped. When the CDA unit is operated, the engine is controlled by using the second suction air amount calculated using the opening degree of the throttle valve as the suction air amount supplied to the engine.

상기 압력센서는 MAP(Manifold Absolute Pressure)센서이다.The pressure sensor is a MAP (Manifold Absolute Pressure) sensor.

상기 제어부는 제2흡입공기량의 값이 상기 제1흡입공기량과 동일하도록 상기 스로틀밸브의 개도를 조정한다.The control unit adjusts the opening degree of the throttle valve so that the value of the second suction air amount is equal to the first suction air amount.

또한, 상기 목적을 달성하기 위하여 본 발명의 CDA기능을 갖는 차량의 엔진 제어 방법은, 차량의 엔진회전수, 흡기매니폴드의 내부 공기압력, 스로틀밸브의 개도, 스로틀밸브의 전후단의 압력을 검출하는 정보검출단계와; 다수개의 연소실 중 일부를 정지시키는 CDA부가 작동되는지를 판단하는 CDA작동판단단계와; 상기 CDA작동판단단계에서 상기 CDA부가 작동된다고 판단되었을 경우에는 상기 스로틀밸브의 개도, 차량의 엔진회전수 및 스로틀밸브의 전후단의 압력을 이용하여 계산된 제2흡입공기량을 엔진에 공급되는 흡입공기량값으로 전환하는 제2전환단계와; 상기 CDA작동판단단계에서 상기 CDA부가 정지되었다고 판단되었을 경우에는 상기 흡기매니폴드의 내부 공기압력을 이용하여 계산된 제1흡입공기량을 엔진에 공급되는 흡입공기량값으로 전환하는 제1전환단계를 포함하여 이루어진 것을 특징으로 한다.Further, in order to achieve the above object, the engine control method of a vehicle having the CDA function of the present invention detects the engine speed of the vehicle, the internal air pressure of the intake manifold, the opening degree of the throttle valve, and the pressure of the front and rear ends of the throttle valve. An information detection step; A CDA operation determining step of determining whether a CDA unit for stopping some of the plurality of combustion chambers is operated; When it is determined that the CDA unit is operated in the CDA operation determination step, the second intake air amount calculated by using the opening degree of the throttle valve, the engine speed of the vehicle, and the pressure of the front and rear ends of the throttle valve is supplied to the engine. A second switching step of converting to a value; If it is determined in the CDA operation determination step that the CDA unit is stopped, the first switching step of converting the first intake air amount calculated using the internal air pressure of the intake manifold to the intake air amount value supplied to the engine; Characterized in that made.

상기 운행정보검출단계와 상기 CDA작동판단단계 사이에는, 상기 흡기매니폴드의 내부 공기압력을 이용하여 계산된 상기 제1흡입공기량과, 상기 스로틀밸브의 개도, 차량의 엔진회전수 및 스로틀밸브의 전후단의 압력을 이용하여 계산된 상기 제2흡입공기량이 동일하도록 상기 스로틀밸브의 개도를 조정하여 공기량보정단계를 더 포함하여 이루어진다.Between the operation information detecting step and the CDA operation determining step, the first intake air amount calculated using the internal air pressure of the intake manifold, the opening degree of the throttle valve, the engine speed of the vehicle and the front and rear of the throttle valve And adjusting the opening degree of the throttle valve so that the second suction air amount calculated using the pressure of the stage is the same.

이상에서 설명한 바와 같은 본 발명의 CDA기능을 갖는 차량의 엔진 제어 장치 및 제어방법에 따르면 다음과 같은 효과가 있다.According to the engine control apparatus and control method of a vehicle having a CDA function of the present invention as described above has the following advantages.

CDA부가 장착된 차량용 엔진에서 CDA기능이 동작되는 경우 스로틀밸브의 개도를 이용하여 계산한 흡입공기량값을 가지고 엔진을 제어함으로써, 흡기매니폴드 내부의 맥동에 의해 부정확하게 계산된 공기량을 엔진 제어의 흡입공기량으로 이용하는 것을 방지할 수 있다.When the CDA function is operated in a vehicle engine equipped with the CDA unit, the engine is controlled with the intake air amount calculated using the opening degree of the throttle valve, thereby inaccurately calculating the amount of air calculated by the pulsation inside the intake manifold. It is possible to prevent the use in the amount of air.

이로 인해, CDA기능 동작시 부정확한 실린더 흡입공기량 계산으로 발생하는 공연비 차이에 의한 오염물질의 배출을 감소시킬 수 있고, 흡입공기량으로부터 계산되는 엔진 출력 토크 계산의 정확도 향상으로 엔진 제어가 원활해지는 효과가 있다.As a result, the emission of pollutants due to the difference in air-fuel ratio caused by inaccurate cylinder intake air volume calculation during the CDA function operation can be reduced, and the engine control is smoothed by improving the accuracy of the engine output torque calculation calculated from the intake air volume. have.

도 1은 본 발명의 실시예에 따른 CDA기능을 갖는 차량의 엔진 제어장치의 구성도,
도 2는 본 발명의 실시예에 따른 CDA기능을 갖는 차량의 엔진 제어방법의 순서도,1 is a configuration diagram of an engine control apparatus for a vehicle having a CDA function according to an embodiment of the present invention;
2 is a flowchart of an engine control method of a vehicle having a CDA function according to an embodiment of the present invention;

도 1은 본 발명의 실시예에 따른 CDA기능을 갖는 차량의 엔진 제어장치의 구성도이고, 도 2는 본 발명의 실시예에 따른 CDA기능을 갖는 차량의 엔진 제어방법의 순서도이다.1 is a configuration diagram of an engine control apparatus for a vehicle having a CDA function according to an embodiment of the present invention, and FIG. 2 is a flowchart of an engine control method for a vehicle having a CDA function according to an embodiment of the present invention.

도 1에 도시된 바와 같이, 본 발명의 CDA기능을 갖는 차량의 엔진 제어 장치는, 압력센서(10)와, 개도검출부(20)와, 연산부(30)와, CDA부(40)와, 제어부(50)를 포함하여 이루어진다.As shown in FIG. 1, an engine control apparatus for a vehicle having a CDA function according to the present invention includes a pressure sensor 10, an opening degree detection unit 20, an operation unit 30, a CDA unit 40, and a control unit. It consists of 50.

상기 압력센서(10)는 다수개의 연소실에 연결된 흡기매니폴드 내부의 공기압력을 측정하는 것으로써, MAP(Manifold Absolute Pressure)센서로 이루어진다.The pressure sensor 10 measures the air pressure inside the intake manifold connected to the plurality of combustion chambers, and is made of a MAP (Manifold Absolute Pressure) sensor.

상기 개도검출부(20)는 상기 흡기매니폴드로 공급되는 공기량을 조정하는 스로틀밸브의 개도를 검출한다.The opening degree detection unit 20 detects the opening degree of the throttle valve for adjusting the amount of air supplied to the intake manifold.

상기 연산부(30)는, 상기 압력센서(10)에 의해 측정된 공기압력을 이용하여 제1흡입공기량을 계산하고, 상기 개도검출부(20)에 의해 측정된 스로틀밸브 개도 및 엔진회전수, 스로틀밸브 전후단의 압력을 이용하여 제2흡입공기량을 계산한다.The calculation unit 30 calculates the first intake air amount by using the air pressure measured by the pressure sensor 10, and the throttle valve opening degree, engine speed, and throttle valve measured by the opening degree detection unit 20. The second suction air volume is calculated using the pressure at the front and rear ends.

상기 CDA부(Cylinder De-Activation, 40)는 다수개의 연소실 중 일부를 정지시키는 기능을 갖는 것으로써, 종래의 공지된 구조와 동일한 바, 이에 대한 자세한 설명은 생략한다.The CDA unit (Cylinder De-Activation) 40 has a function of stopping a part of the plurality of combustion chambers, which is the same as a conventionally known structure, and a detailed description thereof will be omitted.

상기 제어부(50)는 상기 CDA부(40)의 작동을 제어한다.The controller 50 controls the operation of the CDA unit 40.

상기 제어부(50)는, 상기 CDA부(40)가 정지된 경우 즉 상기 CDA부(40)의 기능이 동작하지 않을 경우에는, 상기 압력센서(10)를 이용하여 계산된 상기 제1흡입공기량을 엔진에 공급되는 흡입공기량으로 사용하여 엔진을 제어(연료분사 및 각종 제어 등)한다.When the CDA unit 40 is stopped, that is, when the function of the CDA unit 40 does not operate, the control unit 50 calculates the first intake air amount calculated using the pressure sensor 10. The engine is controlled (fuel injection and various controls, etc.) using the amount of intake air supplied to the engine.

그리고, 상기 제어부(50)는 상기 CDA부(40)가 작동될 경우, 상기 스로틀밸브의 개도 등을 이용하여 계산된 상기 제2흡입공기량을 엔진에 공급되는 흡입공기량으로 사용하여 엔진을 제어한다.When the CDA unit 40 is operated, the controller 50 controls the engine by using the second suction air amount calculated by using the opening degree of the throttle valve, etc. as the suction air amount supplied to the engine.

또한, 상기 CDA부(40)의 작동 후 종료되었을 경우에는, 다시 상기 제1흡입공기량을 이용하여 엔진을 제어한다.In addition, when it is finished after the operation of the CDA unit 40, the engine is controlled again by using the first intake air amount.

한편, 정상상태에서는 상기 제1흡입공기량과 상기 제2흡입공기량의 차이가 발생하지 않으나, 카본퇴적이 발생하거나 엔진 편가 또는 스로틀밸브 등의 편차가 있을 경우 두 계산값에 차이가 발생할 수 있다.On the other hand, in the steady state, the difference between the first intake air amount and the second intake air amount does not occur, but when the carbon deposition occurs or there is a deviation of the engine cost or the throttle valve, the difference between the two calculated values may occur.

이때 상기 제어부(50)는 제2흡입공기량의 값이 상기 제1흡입공기량과 동일하도록 상기 스로틀밸브의 개도를 지속적으로 조정한다.At this time, the controller 50 continuously adjusts the opening degree of the throttle valve so that the value of the second suction air amount is equal to the first suction air amount.

즉, 상기 제어부(50)는, 상기 압력센서(10)를 이용하여 계산된 제1흡입공기량과, 상기 스로틀밸브의 개도, 엔진회전수, 스로틀밸브 전후단의 압력 등을 이용하여 계사된 제2흡입공기량을 비교하여, 두 계산값에 차이가 있을 경우 상기 제2흡입공기량이 상기 제1흡입공기량과 동일하게 되도록 상기 스로틀밸브의 개도를 지속적으로 조정하여 보정한다.
That is, the control unit 50, the second intake is calculated using the first intake air amount calculated using the pressure sensor 10, the opening degree of the throttle valve, the engine speed, the pressure before and after the throttle valve, etc. By comparing the intake air amount, if there is a difference between the two calculated values, the opening degree of the throttle valve is continuously adjusted and corrected so that the second intake air amount is equal to the first intake air amount.

그리고, 본 발명의 CDA기능을 갖는 차량의 엔진 제어 방법은 도 2에 도시된 바와 같이, 운행정보검출단계(S10)와, 공기량보정단계(S20)와, CDA작동판단단계(S30)와, 제1전환단계(S50)와, 제2전환단계(S40)를 포함하여 이루어진다.In addition, the engine control method of the vehicle having the CDA function of the present invention, as shown in Figure 2, operation information detection step (S10), air volume correction step (S20), CDA operation determination step (S30), It comprises a first switching step (S50), and a second switching step (S40).

상기 운행정보검출단계(S10)는 각종 센서를 이용하여, 차량의 엔진회전수, 흡기매니폴드의 내부 공기압력, 스로틀밸브의 개도, 스로틀밸브의 전후단의 압력 등을 검출하는 단계이다.The operation information detecting step (S10) is a step of detecting the engine speed of the vehicle, the internal air pressure of the intake manifold, the opening degree of the throttle valve, and the pressure of the front and rear ends of the throttle valve using various sensors.

상기 공기량보정단계(S20)는, 상기 흡기매니폴드의 내부 공기압력을 이용하여 계산된 상기 제1흡입공기량과, 상기 스로틀밸브의 개도, 차량의 엔진회전수 및 스로틀밸브의 전후단의 압력 등을 이용하여 계산된 상기 제2흡입공기량이 동일하게 되도록 상기 스로틀밸브의 개도를 조정하여 상기 제2흡입공기량의 계산값을 보정하는 단계이다.The air volume correcting step (S20) may include the first intake air amount calculated using the internal air pressure of the intake manifold, the opening degree of the throttle valve, the engine speed of the vehicle, the pressure at the front and rear ends of the throttle valve, and the like. And correcting the calculated value of the second suction air amount by adjusting the opening degree of the throttle valve so that the second suction air amount calculated using the same is the same.

이러한 상기 공기량보정단계(S20)는, 도 2에 도시된 바와 같이 먼저 상기 제1흡입공기량과 제2흡입공기량이 동일한지를 판단한다(S21).The air amount correction step (S20), as shown in Figure 2 first determines whether the first intake air amount and the second intake air amount is the same (S21).

상기 제1흡입공기량과 제2흡입공기량이 동일하면 상기 CDA작동판단단계(S30)를 수행하고, 상기 제1흡입공기량과 제2흡입공기량이 동일하지 않으면 상기 스로틀밸브의 개도를 조정하여 상기 제2흡입공기량의 계산값을 계속하여 보정한다(S22).If the first suction air amount and the second suction air amount are the same, the CDA operation determination step (S30) is performed. If the first suction air amount and the second suction air amount are not the same, the opening degree of the throttle valve is adjusted to adjust the second. The calculated value of the intake air amount is continuously corrected (S22).

위와 같은 단계는 상기 CDA부(40)의 작동여부와 관계없이 수시로 이루어져 상기 압력센서(10)를 이용하여 계산된 상기 제1흡입공기량과 상기 스로틀밸브의 개도 등을 이용하여 계산된 상기 제2흡입공기량이 일치되도록 한다.The above steps are made at any time regardless of whether the CDA unit 40 is operated or not, and the second suction is calculated using the first suction air amount calculated using the pressure sensor 10 and the opening degree of the throttle valve. Make sure the air volume matches.

상기 CDA작동판단단계(S30)는 다수개의 연소실 중 일부를 정지시키는 CDA부(40)가 작동되는지를 판단하는 단계이다.The CDA operation determination step (S30) is a step of determining whether the CDA unit 40 for stopping some of the plurality of combustion chambers is operated.

상기 CDA작동판단단계(S30)에서 상기 CDA부(40)가 작동된다고 판단되면 상기 제2전환단계(S40)를 수행하고, 상기 CDA부(40)가 작동되지 않는다고 판단되면 상기 제1전환단계(S50)를 수행한 후 상기 운행정보검출단계(S10)로 리턴된다.If it is determined in the CDA operation determination step (S30) that the CDA unit 40 is operated, the second switching step (S40) is performed, and if it is determined that the CDA unit 40 is not operated, the first switching step ( After performing S50), the process returns to the operation information detecting step S10.

상기 제2전환단계(S40)는 상기 CDA작동판단단계(S30)에서 상기 CDA부(40)가 작동된다고 판단되었을 경우에, 상기 스로틀밸브의 개도, 차량의 엔진회전수 및 스로틀밸브의 전후단의 압력을 이용하여 계산된 제2흡입공기량을 엔진에 공급되는 흡입공기량값으로 전환하는 단계이다.The second switching step (S40) is the opening of the throttle valve, the engine speed of the vehicle and the front and rear ends of the throttle valve when it is determined that the CDA unit 40 is operated in the CDA operation determination step (S30). The second intake air amount calculated using the pressure is converted into the intake air amount value supplied to the engine.

따라서, 상기 제어부(50)는 CDA부(40)가 작동되는 경우, 상기 제2전환단계(S40)에서 흡입공기량값으로 전환된 상기 제2흡입공기량을 이용하여 연료분사 및 각종 제어를 진행하게 된다.Therefore, when the CDA unit 40 is operated, the control unit 50 performs fuel injection and various controls by using the second intake air amount converted into the intake air amount value in the second switching step S40. .

상기 CDA부(40)가 작동될 경우 실린더 흡입의 불연속 및 불균등으로 인해 맥동이 크게 발생하고 이로 인해 상기 압력센서(10)의 측정값을 이용한 정확한 흡입공기량의 계산이 불가능하지만, 본 발명에서는 상기 CDA부(40)가 작동될 경우 상기 스로틀밸브의 개도 등을 이용하여 계산된 제2흡입공기량을 흡입공기량값으로 사용하기 때문에, 맥동에 관계없이 정확하게 엔진 등을 제어할 수 있다.When the CDA unit 40 is operated, pulsation is greatly generated due to the discontinuity and inequality of the cylinder suction, which makes it impossible to calculate an accurate suction air amount using the measured value of the pressure sensor 10. When the unit 40 is operated, since the second intake air amount calculated using the opening degree of the throttle valve is used as the intake air amount value, the engine and the like can be accurately controlled regardless of the pulsation.

그리고, 상기 제1전환단계(S50)는, 상기 흡기매니폴드의 내부 공기압력을 이용하여 계산된 제1흡입공기량을 엔진에 공급되는 흡입공기량값으로 전환하는 단계로써, 이는 압력센서(10)를 이용하여 흡기매니폴드에 공급되는 흡입공기량을 계산하고 이를 가지고 엔진을 제어하는 일방적인 차량의 엔진 제어방식과 동일하다.In addition, the first switching step (S50) is a step of converting the first intake air amount calculated by using the internal air pressure of the intake manifold to the intake air amount value supplied to the engine, which is a pressure sensor 10 It is the same as the engine control method of the unilateral vehicle which calculates the amount of intake air supplied to the intake manifold and controls the engine with it.

따라서, 상기 제어부(50)는 CDA부(40)가 작동되지 않는 경우, 상기 제1전환단계(S50)에서 흡입공기량값으로 전환된 상기 제1흡입공기량을 이용하여 연료분사 및 각종 제어를 진행하게 된다.Therefore, when the CDA unit 40 is not operated, the control unit 50 performs fuel injection and various controls by using the first intake air amount converted into the intake air amount value in the first switching step S50. do.

본 발명인 CDA기능을 갖는 차량의 엔진 제어 장치 및 제어방법은 전술한 실시예에 국한하지 않고, 본 발명의 기술 사상이 허용되는 범위 내에서 다양하게 변형하여 실시할 수 있다.The engine control apparatus and control method for a vehicle having the CDA function according to the present invention are not limited to the above-described embodiments, and various modifications can be carried out within the scope of the technical idea of the present invention.

10 : 압력센서, 20 : 개도검출부, 30 : 연산부, 40 : CDA부, 50 : 제어부,
S10 : 운행정보검출단계,
S20 : 공기량보정단계,
S30 : CDA작동판단단계,
S40 : 제2전환단계, S50 : 제1전환단계,10: pressure sensor, 20: opening detection unit, 30: calculating unit, 40: CDA unit, 50: control unit,
S10: operation information detection step,
S20: air volume correction step,
S30: CDA operation judgment step,
S40: second transition stage, S50: first transition stage,

Claims (5)

흡기매니폴드 내부의 공기압력을 측정하는 압력센서와;
상기 흡기매니폴드로 공급되는 공기량을 조정하는 스로틀밸브의 개도를 검출하는 개도검출부와;
상기 압력센서에 의해 측정된 공기압력을 이용하여 제1흡입공기량을 계산하고, 상기 개도검출부에 의해 측정된 스로틀밸브 개도 및 엔진회전수, 스로틀밸브 전후단의 압력을 이용하여 제2흡입공기량을 계산하는 연산부와;
다수개의 연소실 중 일부를 정지시키는 CDA(Cylinder De-Activation)부와;
상기 CDA부의 작동을 제어하는 제어부를 포함하여 이루어지되,
상기 제어부는,
상기 CDA부가 정지된 경우 상기 압력센서를 이용하여 계산된 상기 제1흡입공기량을 엔진에 공급되는 흡입공기량으로 사용하여 엔진을 제어하고,
상기 CDA부가 작동될 경우 상기 스로틀밸브의 개도를 이용하여 계산된 상기 제2흡입공기량을 엔진에 공급되는 흡입공기량으로 사용하여 엔진을 제어하는 것을 특징으로 하는 CDA기능을 갖는 차량의 엔진 제어 장치.A pressure sensor for measuring the air pressure inside the intake manifold;
An opening degree detection section for detecting an opening degree of a throttle valve for adjusting an amount of air supplied to the intake manifold;
The first intake air amount is calculated using the air pressure measured by the pressure sensor, and the second intake air amount is calculated using the throttle valve opening degree, the engine speed, and the pressure before and after the throttle valve measured by the opening degree detection unit. A calculating unit;
A CDA (Cylinder De-Activation) unit for stopping some of the plurality of combustion chambers;
It includes a control unit for controlling the operation of the CDA unit,
The control unit,
When the CDA unit is stopped, the engine is controlled by using the first intake air amount calculated using the pressure sensor as the intake air amount supplied to the engine,
And the CDA unit controls the engine by using the second intake air amount calculated using the opening degree of the throttle valve as the intake air amount supplied to the engine. 청구항1에 있어서,
상기 압력센서는 MAP(Manifold Absolute Pressure)센서인 것을 특징으로 하는 CDA기능을 갖는 차량의 엔진 제어 장치.The method according to claim 1,
The pressure sensor is an engine control apparatus for a vehicle having a CDA function, characterized in that the MAP (Manifold Absolute Pressure) sensor. 청구항1 또는 청구항2에 있어서,
상기 제어부는 제2흡입공기량의 값이 상기 제1흡입공기량과 동일하도록 상기 스로틀밸브의 개도를 조정하는 것을 특징으로 하는 CDA기능을 갖는 차량의 엔진 제어 장치.The method according to claim 1 or 2,
And the control unit adjusts the opening degree of the throttle valve so that the value of the second suction air amount is equal to the first suction air amount. 차량의 엔진회전수, 흡기매니폴드의 내부 공기압력, 스로틀밸브의 개도, 스로틀밸브의 전후단의 압력을 검출하는 운행정보검출단계와;
다수개의 연소실 중 일부를 정지시키는 CDA부가 작동되는지를 판단하는 CDA작동판단단계와;
상기 CDA작동판단단계에서 상기 CDA부가 작동된다고 판단되었을 경우에는 상기 스로틀밸브의 개도, 차량의 엔진회전수 및 스로틀밸브의 전후단의 압력을 이용하여 계산된 제2흡입공기량을 엔진에 공급되는 흡입공기량값으로 전환하는 제2전환단계와;
상기 CDA작동판단단계에서 상기 CDA부가 정지되었다고 판단되었을 경우에는 상기 흡기매니폴드의 내부 공기압력을 이용하여 계산된 제1흡입공기량을 엔진에 공급되는 흡입공기량값으로 전환하는 제1전환단계를 포함하여 이루어진 것을 특징으로 하는 CDA기능을 갖는 차량의 엔진 제어 방법.A driving information detecting step of detecting the engine speed of the vehicle, the internal air pressure of the intake manifold, the opening degree of the throttle valve, and the pressure of the front and rear ends of the throttle valve;
A CDA operation determining step of determining whether a CDA unit for stopping some of the plurality of combustion chambers is operated;
When it is determined that the CDA unit is operated in the CDA operation determination step, the second intake air amount calculated by using the opening degree of the throttle valve, the engine speed of the vehicle, and the pressure of the front and rear ends of the throttle valve is supplied to the engine. A second switching step of converting to a value;
If it is determined in the CDA operation determination step that the CDA unit is stopped, the first switching step of converting the first intake air amount calculated using the internal air pressure of the intake manifold to the intake air amount value supplied to the engine; Engine control method of a vehicle having a CDA function, characterized in that made. 청구항4에 있어서,
상기 운행정보검출단계와 상기 CDA작동판단단계 사이에는,
상기 흡기매니폴드의 내부 공기압력을 이용하여 계산된 상기 제1흡입공기량과, 상기 스로틀밸브의 개도, 차량의 엔진회전수 및 스로틀밸브의 전후단의 압력을 이용하여 계산된 상기 제2흡입공기량이 동일하도록 상기 스로틀밸브의 개도를 조정하여 공기량보정단계를 더 포함하여 이루어진 것을 특징으로 하는 CDA기능을 갖는 차량의 엔진 제어 방법.
The method of claim 4,
Between the driving information detection step and the CDA operation determination step,
The first intake air amount calculated using the internal air pressure of the intake manifold, the opening amount of the throttle valve, the engine speed of the vehicle, and the second intake air amount calculated using the pressure at the front and rear ends of the throttle valve. Adjusting the opening degree of the throttle valve to the same, the engine control method of a vehicle having a CDA function, characterized in that further comprising the step of adjusting the air volume.
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