KR20070088933A - Engine control method of vehicle - Google Patents

Engine control method of vehicle Download PDF

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Publication number
KR20070088933A
KR20070088933A KR1020060018821A KR20060018821A KR20070088933A KR 20070088933 A KR20070088933 A KR 20070088933A KR 1020060018821 A KR1020060018821 A KR 1020060018821A KR 20060018821 A KR20060018821 A KR 20060018821A KR 20070088933 A KR20070088933 A KR 20070088933A
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South Korea
Prior art keywords
engine
idle state
vehicle
rpm
exhaust
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KR1020060018821A
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Korean (ko)
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김영권
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현대자동차주식회사
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Priority to KR1020060018821A priority Critical patent/KR20070088933A/en
Publication of KR20070088933A publication Critical patent/KR20070088933A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/021Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/08Introducing corrections for particular operating conditions for idling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/06Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine 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)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A method for controlling an engine of a vehicle is provided to prevent a failure of an initial engine start by forcibly extracting a condensing water with increasing an RPM of the engine. An engine controlling method for a vehicle includes the steps of: checking whether an outside air temperature is below 0 or not by using an outside air temperature sensor(S1); checking whether an engine operates at an idle state if the outside air temperature is below zero(S2); checking whether the idle state of the engine lasts longer than A hour(S3); operating the engine for C hour to increase an RPM of the engine to a target RPM if the idle state lasts more than A hour(S4); and finishing the above-described logic by turning an ignition off(S5).

Description

자동차의 엔진 제어방법{ENGINE CONTROL METHOD OF VEHICLE}ENGINE CONTROL METHOD OF VEHICLE}

도 1은 본 발명에 따른 자동차의 엔진 제어방법을 나타낸 제어흐름도이다. 1 is a control flowchart illustrating an engine control method of a vehicle according to the present invention.

본 발명은, 자동차의 엔진 제어방법에 관한 것으로서, 보다 상세하게는, 배기계 빙결을 방지하여 엔진의 초기 시동이 원활히 수행될 수 있는 자동차의 엔진 제어방법에 관한 것이다.The present invention relates to a method for controlling an engine of an automobile, and more particularly, to an engine control method for an automobile, in which an initial start of an engine can be smoothly performed by preventing an exhaust system freezing.

일반적으로 자동차에는 엔진에서 연소된 배기가스를 외부로 배출시키는 배기 시스템이 마련되어 있는데, 이러한 배기 시스템은 실린더 헤드에 결합된 배기 매니몰드와, 배기 매니폴드에서 모아진 배기가스를 차량 후방으로 안내하도록 호스 또는 파이프로 구성된 배기 라인과, 배기 라인 상에 설치된 촉매변환기와, 배기음을 감소시키는 머플러를 포함하여 이루어진다. 이에, 배기가스는 배기 라인을 통해 촉매변화기 및 머플러를 통해 감온 감압된 후 외부로 배출될 수 있다. In general, automobiles are provided with an exhaust system for exhausting the exhaust gas from the engine to the outside, which includes an exhaust manifold coupled to the cylinder head and a hose or hose to guide the exhaust gas collected from the exhaust manifold to the rear of the vehicle. And an exhaust line composed of pipes, a catalytic converter installed on the exhaust line, and a muffler for reducing exhaust noise. Thus, the exhaust gas may be discharged to the outside after the temperature reduction through the catalytic converter and muffler through the exhaust line.

그런데, 이러한 종래의 자동차에 있어서는, 외기온도가 영하인 한랭지에서 장시간 아이들(idle)상태가 지속되면, 배기 시스템에서 발생한 응축수가 배기 라인 및 머플러의 내부 튜브에서 빙결되어 배출가스의 유로를 차단하므로 엔진 초기 시 동이 걸리지 않는 문제점이 있다. However, in such a conventional vehicle, if the idle state is maintained for a long time in the cold district where the outside air temperature is below zero, the condensed water generated in the exhaust system is frozen in the exhaust line and the inner tube of the muffler to block the flow path of the exhaust gas. There is a problem that the initial startup does not take place.

따라서, 상기 문제점을 해결하기 수단으로서, 배기계 파이프가 언더 플로어와 가까워지도록 루트를 변경하거나, 파이프에 응축수가 고이지 않도록 골이 형성되지 않는 레이아웃을 설정하거나, 배기계 파이프 또는 소음기 내부의 튜브의 직경을 증대시켜 응축수가 응결되는 것을 방지하였다.Accordingly, as a means to solve the above problem, the route is changed so that the exhaust pipe is close to the underfloor, the layout is formed so that no condensate is accumulated in the pipe, or the diameter of the tube inside the exhaust pipe or the silencer is increased. To prevent condensation from condensing.

그러나, 배기계 파이프가 언더 플로어와 가까워지도록 루트를 변경하는 방법은 배기계와 언더 플로어 및 기타 상관 부품과 근접하기 때문에 열해성능에 있어서 불리하고, 파이프에 응축수가 고이지 않도록 골이 형성되지 않는 레이아웃을 설정하는 방법은 차량 전체의 레이아웃 자유도가 떨어지므로 개발 기간이 증가하고 실내 공간을 확보하는데 불리하며, 배기계 파이프 또는 소음기 내부의 튜브의 직경을 증대시키는 경우에는 직경 증대에 따른 소음 저감 및 배압 성능이 떨어지는 문제점이 있다. However, the method of changing the route so that the exhaust pipe is close to the underfloor is disadvantageous in thermal performance because it is close to the exhaust system and the underfloor and other correlated parts, and sets a layout in which the condensate is not formed in the pipe so that condensate does not form in the pipe. The method is disadvantageous in increasing the development period and securing the interior space because the layout freedom of the entire vehicle is reduced, and in the case of increasing the diameter of the exhaust pipe or the tube inside the silencer, there is a problem that the noise reduction and the back pressure performance decrease due to the diameter increase. have.

따라서, 본 발명의 목적은, 한랭지에서 배기계에서 발생한 응축수의 빙결을 방지하여 엔진의 초기 시동이 원활히 이루어질 수 있는 자동차의 엔진 제어방법을 제공하는 것이다. Accordingly, it is an object of the present invention to provide an engine control method of a vehicle in which an initial start of an engine can be smoothly performed by preventing freezing of condensate generated in an exhaust system in a cold region.

한편, 배기계 파이프의 루트 및 직경을 변경하지 않고 응축수를 외부로 배출함으로써, 종래에 파이프의 루트 또는 직경 변경시 발생하였던 열해성능 저하 및 레이아웃의 자유도 저하 또는 NVH 성능이 감소되는 문제를 해결하는 것이다. On the other hand, by discharging the condensate to the outside without changing the root and diameter of the exhaust pipe, it is to solve the problem that the degradation of thermal degradation performance, the degree of freedom of layout or the NVH performance, which occurred when the root or diameter of the pipe is changed in the past, is reduced. .

상기 목적은, 본 발명에 따라, 자동차의 엔진 제어방법에 있어서, 외기기온이 영하일 때 엔진이 아이들(idle) 상태로 운전되는지 판단하는 단계와; 상기 엔진이 아이들 상태로 운전될 때, 소정 시간 범위이상 지속되는지 판단하는 단계와; 상기 엔진이 아이들 상태로 소정 시간 범위이상 지속될 때, 상기 엔진이 목표 rpm까 지 상승되도록 소정 시간 범위동안 운전시켜 배기계의 응축수를 배출시키는 단계에 의해 달성된다.According to an aspect of the present invention, there is provided a method for controlling an engine of a vehicle, comprising: determining whether the engine is driven in an idle state when the outside temperature is below zero; Determining whether the engine lasts for a predetermined time range when the engine is operated in an idle state; When the engine continues in the idle state for more than a predetermined time range, it is achieved by operating the engine for a predetermined time range to discharge the condensate of the exhaust system so that the engine is raised to a target rpm.

여기서, 상기 엔진의 목표 rpm은 대략 1500 ~ 2000 rpm 으로 상승되는 것이 바람직하다. Here, the target rpm of the engine is preferably raised to approximately 1500 ~ 2000 rpm.

상기 엔진은 대략 3 ~ 4초간 운전되는 것이 바람직하다. The engine is preferably operated for approximately 3-4 seconds.

이하에서는 첨부도면을 참조하여 본 발명에 대해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

일반적으로 엔진에서 연소되어 배출되는 배기가스는 실린더 헤드에 결합된 배기 매니폴드에서 모아져 배기 파이프를 통해 자동차의 후방으로 유도된 후, 벨로우즈, 촉매 컨버터, 머플러 등의 장치를 경유하여 외부로 배출되도록 구성되어 있다. In general, exhaust gas emitted by combustion from an engine is collected in an exhaust manifold coupled to a cylinder head, guided to the rear of the vehicle through an exhaust pipe, and then discharged to the outside via devices such as a bellows, a catalytic converter, and a muffler. It is.

이 때, 배기가스가 배출되는 과정에서 온도차 등의 원인으로 응축수가 발생하게 되는데, 본 발명에 따른 자동차의 엔진 제어방법은 엔진의 ECU로 입력되는 데이터를 기초로 하여 엔진의 rpm을 올려줌으로써, 배기계의 응축수의 빙결량이 많아지기 전 응축수를 사전에 배출하여 엔진의 초기 시동이 원활하게 이루어지게 하는 점에 있다. At this time, condensed water is generated in the process of exhaust gas discharge due to temperature difference, etc. The engine control method of the vehicle according to the present invention increases the rpm of the engine based on data input to the ECU of the engine, thereby reducing the exhaust system. This is to discharge the condensate in advance before the freezing amount of condensate increases, so that the initial start of the engine can be smoothly performed.

즉, 도 1에 도시된 바와 같이, 먼저 외기온도센서(미도시)에 의해 감지된 외 기온도가 0도 이하인지 판단하여(S1), 외기온도가 영하일 때 엔진이 아이들(idle) 상태로 운전하는지 판단한다(S2). 이 때, 아이들(idle) 상태인 경우 엔진의 rpm은 대략 1000 rpm 전후가 된다. That is, as shown in FIG. 1, first, it is determined whether the outside temperature detected by the outside temperature sensor (not shown) is 0 degrees or less (S1), and the engine is idle when the outside temperature is below zero. It is determined whether to drive (S2). At this time, in the idle state, the engine rpm is approximately 1000 rpm.

그 후, 엔진이 아이들(idle) 상태로 A시간 이상 지속되는지 판단하여(S3), A시간 이상 지속되면 엔진의 목표 rpm(B)까지 상승되도록 엔진을 C 시간 범위동안 운전시킨다(S4). 이 때, A시간은 대략 5시간 전후가 되는데, 이는 배기계(특히, 소음기) 내부에 응축수가 기준이상으로 고이는 시간으로서 시험을 통해 결정되며, 차량에 따라 상이해질 수 있을 것이다. 한편, 소음기 내에 고인 응축수가 외부로 배출되기 위한 엔진의 목표 rpm(B)의 범위 및 시간(C)은 각각 대략 1500 ~ 2000 rpm 및 3 ~ 4초로서, 이는 엔진 배기량의 특성에 맞게 시험을 통해 결정될 수 있을 것이다. 그 후, 시동을 오프(off)하여(S5) 상기 로직을 종료한다. Thereafter, it is determined whether the engine lasts for more than A hours in an idle state (S3), and if the engine continues for more than A hours, the engine is operated for a C time range so as to rise to the target rpm (B) of the engine (S4). At this time, the A time is about 5 hours, which is determined by the test as the time that the condensate accumulates above the reference inside the exhaust system (especially the silencer), and may vary depending on the vehicle. On the other hand, the range and time (C) of the target rpm (B) of the engine to discharge the condensate accumulated in the muffler to the outside is approximately 1500 to 2000 rpm and 3 to 4 seconds, respectively, which are tested according to the characteristics of the engine displacement. Can be determined. After that, the startup is turned off (S5) to terminate the logic.

전술한 실시예에서 언급된 수치는 배기계의 종류 및 사양에 따라 다소 차이가 있을 것이므로, 본 발명의 기술적 사상이 변하지 않는 범위 내의 다른 실시예들은 본 발명에 속한다고 할 수 있을 것이다. Since the numerical values mentioned in the above embodiments will be somewhat different depending on the type and specification of the exhaust system, other embodiments within the scope that do not change the technical spirit of the present invention will belong to the present invention.

이상 설명한 바와 같이, 본 발명에 따르면, 외기가 영하인 장소에서 엔진의 아이들(idle)상태가 오래 지속된 경우 배기계에서 발생한 응축수를 엔진의 rpm을 높여 강제 배출시킴으로써, 엔진 초기 시동이 걸리지 않는 것을 미연에 방지할 수 있는 자동차의 엔진 제어방법을 제공한다. 한편, 배기계 파이프의 루트 및 직경을 변경하지 않고 응축수를 외부로 배출함으로써, 종래에 파이프의 루트 또는 직경 변 경시 발생하였던 열해성능 저하 및 레이아웃의 자유도가 저하 또는 NVH 성능이 감소되는 문제를 해결하는 것이다. As described above, according to the present invention, when the idle state of the engine is maintained at a low temperature outside the engine for a long time, the engine initial start is not started by forcibly discharging the condensate generated in the exhaust system by increasing the rpm of the engine. It provides a method of controlling the engine of the vehicle that can be prevented. On the other hand, by discharging the condensate to the outside without changing the route and diameter of the exhaust pipe, it is to solve the problem that the degradation of thermal degradation performance, the degree of freedom of layout, or the NVH performance, which occurred when the route or diameter of the pipe changes in the past, is reduced. .

또한, 엔진기종별로 다른 배기계를 사용하지 않고 모든 신규 차종 및 양산 차종에 적용할 수 있으므로 배기계 개발 기간이 단축될 수 있다. 특히 혹한기 지역을 위한 사양 추가시 배기계의 신규 개발이 필요없으므로 본 발명에 따른 엔진 제어방법은 유용하다. In addition, the development period of the exhaust system can be shortened because it can be applied to all new models and mass-production vehicles without using an exhaust system different for each engine model. In particular, the engine control method according to the present invention is useful because it is not necessary to develop a new exhaust system when adding a specification for a cold weather region.

Claims (3)

외기기온이 영하일 때 엔진이 아이들(idle) 상태로 운전되는지 판단하는 단계와;Determining whether the engine operates in an idle state when the outside temperature is below zero; 상기 엔진이 아이들 상태로 운전될 때, 소정 시간 범위이상 지속되는지 판단하는 단계와;Determining whether the engine lasts for a predetermined time range when the engine is operated in an idle state; 상기 엔진이 아이들 상태로 소정 시간 범위이상 지속될 때, 상기 엔진이 목표 rpm까지 상승되도록 소정 시간 범위동안 운전시켜 배기계의 응축수를 배출시키는 단계를 포함하는 것을 특징으로 하는 자동차의 엔진 제어방법. And when the engine continues in the idle state for more than a predetermined time range, driving the engine for a predetermined time range to discharge the condensed water of the exhaust system so that the engine is raised to a target rpm. 제1항에 있어서,The method of claim 1, 상기 엔진의 목표 rpm은 대략 1500 ~ 2000 rpm 으로 상승되는 것을 특징으로 하는 자동차의 엔진 제어방법. The target rpm of the engine is raised to approximately 1500 ~ 2000 rpm engine control method of the vehicle. 제2항에 있어서,The method of claim 2, 상기 엔진은 대략 3 ~ 4초간 운전되는 것을 특징으로 하는 자동차의 엔진 제어방법. And the engine is operated for about 3 to 4 seconds.
KR1020060018821A 2006-02-27 2006-02-27 Engine control method of vehicle KR20070088933A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10100762B2 (en) * 2015-04-09 2018-10-16 Toyota Jidosha Kabushiki Kaisha Engine control device
US10280823B2 (en) 2015-08-25 2019-05-07 Toyota Jidosha Kabushiki Kaisha Engine control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10100762B2 (en) * 2015-04-09 2018-10-16 Toyota Jidosha Kabushiki Kaisha Engine control device
US10280823B2 (en) 2015-08-25 2019-05-07 Toyota Jidosha Kabushiki Kaisha Engine control device

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