KR101509685B1 - Exhaust heat recovery system of vehicle and method - Google Patents

Exhaust heat recovery system of vehicle and method Download PDF

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Publication number
KR101509685B1
KR101509685B1 KR20090118730A KR20090118730A KR101509685B1 KR 101509685 B1 KR101509685 B1 KR 101509685B1 KR 20090118730 A KR20090118730 A KR 20090118730A KR 20090118730 A KR20090118730 A KR 20090118730A KR 101509685 B1 KR101509685 B1 KR 101509685B1
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South Korea
Prior art keywords
cooling water
temperature
engine
exhaust heat
amount
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KR20090118730A
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Korean (ko)
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KR20110062138A (en
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황순현
이봉상
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현대자동차 주식회사
기아자동차 주식회사
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Priority to KR20090118730A priority Critical patent/KR101509685B1/en
Priority to US12/847,728 priority patent/US20110126783A1/en
Priority to CN2010102527868A priority patent/CN102086797A/en
Priority to DE102010037090A priority patent/DE102010037090A1/en
Publication of KR20110062138A publication Critical patent/KR20110062138A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater
    • 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
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

본 발명은 차량의 배기열 회수장치로, 냉각수의 온도 조건에 따라 배기열 교환기와 엔진을 순환하는 냉각수의 양을 능동적으로 제어하여 연비향상과 에미션 안정화를 제공하도록 하는 것이다.The present invention relates to an exhaust heat recovery apparatus for a vehicle, which is capable of actively controlling the amount of cooling water circulating through an exhaust heat exchanger and an engine in accordance with the temperature condition of cooling water, thereby improving fuel economy and stabilizing the emission.

본 발명은 엔진의 시동 온에 따라 냉각수의 온도를 검출하여 웜업 판정의 기준온도와 비교하는 과정, 냉각수의 온도가 기준온도 미만이면 엔진을 순환하는 냉각수의 양을 보다 배기열 교환기를 순환하는 냉각수의 양을 많게 조정하는 과정, 냉각수의 온도 상승으로 기준온도를 초과하면 배기열 교환기를 순환하는 냉각수의 양 보다 엔진을 순환하는 냉각수의 양을 많게 조정하는 과정을 포함한다.The present invention relates to a method for controlling an engine, comprising the steps of: detecting a temperature of a cooling water according to an engine start-up and comparing the detected temperature with a reference temperature of a warm-up determination; And adjusting the amount of cooling water circulating the engine more than the amount of cooling water circulating in the exhaust heat exchanger if the reference temperature is exceeded due to the temperature rise of the cooling water.

워터펌프, 배기열, 제어밸브, 냉각수 순환, 웜업 Water pump, exhaust heat, control valve, cooling water circulation, warm up

Description

차량의 배기열 회수장치 및 방법{Exhaust heat recovery system of vehicle and method} BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust heat recovery system,

본 발명은 차량의 배기열 회수장치에 관한 것으로, 보다 상세하게는 냉각수의 온도 조건에 따라 배기열 교환기와 엔진을 순환하는 냉각수의 양을 능동적으로 제어하여 연비향상과 에미션 안정화를 제공하도록 하는 차량의 배기열 회수장치 및 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust heat recovery apparatus for a vehicle, and more particularly to an exhaust heat recovery apparatus for a vehicle, which is capable of actively controlling the amount of cooling water circulating through an exhaust heat exchanger and an engine, And to a recovery device and method.

현재 차량 제작 메이커는 차량을 개발하는 과정에서 강화되는 배기가스 규제와 연비개선의 중요도가 증가함에 따라 두 가지 목표를 동시에 달성하기 위해 다양한 연구개발이 진행되고 있다.Currently, vehicle makers are undergoing various R & D efforts to achieve both goals, as exhaust gas regulation and fuel efficiency improvement become more important in the process of vehicle development.

이중에서 에미션 규제를 충족시키기 위하여 배기계에 촉매 로딩량을 높이거나 EGR 쿨러의 용량을 증가시키는 경우 차량 중량의 증가에 따라 연비 악화를 초래하고, 차량의 제작 원가를 상승을 초래한다.In the case of increasing the catalyst loading amount in the exhaust system or increasing the capacity of the EGR cooler in order to meet the emission regulation, the fuel cost is deteriorated as the weight of the vehicle is increased, and the production cost of the vehicle is increased.

최근 들어 차량에 적용되는 가변형 워터펌프는 불필요한 영역의 냉각을 차단함으로써, 엔진의 웜업(warm up) 시간을 단축하여 열손실을 줄이는 동시에 마찰저항의 조기 저감을 실현시켜 연비 향상을 제공하여 준다.In recent years, a variable water pump applied to a vehicle has been proposed to prevent unnecessary cooling of the engine, thereby shortening the warm-up time of the engine, thereby reducing heat loss and realizing early reduction of frictional resistance.

통상적으로 엔진의 시동 온에 따라 발생되는 열은 엔진의 온도를 올리는데 소요되는 에너지, 마찰을 이기는데 쓰이는 에너지, 피스톤을 작동시키거나 각종 기구(CAM, 보기류에 연결되는 기구 등)를 움직이는데 사용되는 에너지, 배출가스 에너지로 구분된다.Generally, the heat generated by the start-up of the engine is the energy used to raise the temperature of the engine, the energy used to overcome the friction, the piston to operate, or to move various instruments (such as CAMs, etc.) Energy, and exhaust gas energy.

상기한 에너지들은 손실과 동시에 다음 순서의 일을 위한 준비 에너지로 대응되지만 배출가스 에너지는 촉매를 가열하는 역할이 완료되면 순손실되는 에너지이다.The above-mentioned energies correspond to loss and the ready energy for the next order of work, but the exhaust gas energy is the net loss energy when the role of heating the catalyst is completed.

상기와 같이 순손실되는 배출가스 에너지를 회수하기 위한 배기열 회수장치가 개발되어 적용되고 있는데, 배기열 회수장치는 촉매의 후단에 장착되어 더 이상 사용되지 않고 배출되는 배기가스의 열에너지를 냉각수측으로 전열시켜 냉각수의 온도를 조기에 상승시키기 기능을 실행함으로써 엔진의 웜업 시간의 단축을 제어하여 준다.As described above, an exhaust heat recovery apparatus for recovering a net loss of exhaust gas energy has been developed and applied. The exhaust heat recovery apparatus is installed at the rear end of the catalyst to transfer heat energy of the exhaust gas discharged to the cooling water side, By performing the function of raising the temperature early, it is possible to control the shortening of the warm-up time of the engine.

또한, 엔진이 냉각된 상태에서 시동이 온 되면 엔진의 웜업 시간을 단축시키기 위하여 가변형 워터펌프를 작동시키지 않는데, 이를 위해 가변형 워터펌프의 마그네틱 코일에 전기를 인가하여야 한다.In addition, when the engine is cooled, the variable water pump is not operated in order to shorten the warm-up time of the engine. To this end, electricity must be applied to the magnetic coil of the variable water pump.

그러나, 냉간 상태에서 엔진이 시동 온 되는 외기온, 냉각수온의 조건에 따라 배터리 전압의 상태가 달라지므로 알터네이터를 구동시켜 전기에너지를 생성한 다음 이를 가변형 워터펌프의 마그네틱 코일에 공급하는 현상이 발생한다.However, since the state of the battery voltage changes depending on the conditions of the outside temperature and the cooling water being turned on in the cold state, a phenomenon occurs in which electric energy is generated by driving the alternator and then supplied to the magnetic coil of the variable water pump.

결국 냉간 시동의 상태에서 가변형 워터펌프의 공회전을 통해 엔진의 웜업 시간을 단축하여 열 손실을 줄인다 하더라도 가변형 워터펌프의 마그네틱 코일에 공급하는 전기를 생산하는데 더 큰 부하가 걸리기 때문에 에너지 관점에서 볼 때 이득이 없는 결과가 발생되는 문제점이 있다.As a result, even if the warm-up time of the engine is shortened through idling of the variable-type water pump in the state of cold start to reduce the heat loss, since a larger load is applied to produce electricity to be supplied to the magnetic coils of the variable water pump, There is a problem that a result is not generated.

그렇다고 가변형 워터펌프를 구동시키는 경우 불필요한 열손실이 불가피하게 발생되는 문제점이 있다.However, there is a problem that unnecessary heat loss is inevitably generated when the variable water pump is driven.

본 발명은 상기한 문제점을 해결하기 위하여 발명한 것으로, 그 목적은 엔진의 시동시 냉각수의 온도 조건에 따라 배기열 교환기와 엔진을 순환하는 냉각수의 양을 능동적으로 제어하여 연비향상과 에미션 안정화를 제공하도록 하는 것이다.SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an engine control system and a control method thereof, which actively controls the amount of cooling water circulating through an exhaust heat exchanger and an engine, .

즉, 에너지 효율을 극대화하기 위하여 냉시동 초기에 엔진에는 적은 양의 냉각수를 순환시키고, 배기열 교환기에는 많은 양의 냉각수를 순환시켜 최대의 에너지 효율을 확보하도록 하는 것이다.That is, in order to maximize the energy efficiency, a small amount of cooling water is circulated to the engine at the beginning of cold start, and a large amount of cooling water is circulated to the exhaust heat exchanger to ensure maximum energy efficiency.

상기한 목적을 실현하기 위한 본 발명의 특징에 따른 차량의 배기열 회수장치는, 엔진의 연소열을 흡수한 냉각수를 순환시켜 방열시키는 라디에이터; 촉매의 후단에 장착되어 배기가스의 열에너지를 순환되는 냉각수에 전열시켜 냉각수의 온도를 상승시키는 배기열 교환기; 엔진의 연소열을 흡수한 냉각수를 라디에이터 혹은 바이패스 라인으로 순환시키는 제1밸브; 냉각수를 순환시키는 워터펌프; 냉각수의 온도를 검출하는 수온센서를 포함하며,In order to achieve the above-mentioned object, an exhaust heat recovery apparatus for a vehicle according to a feature of the present invention comprises: a radiator circulating cooling water absorbing combustion heat of an engine to radiate heat; An exhaust heat exchanger mounted on a rear end of the catalyst for transferring heat energy of the exhaust gas to cooling water circulated to increase the temperature of the cooling water; A first valve for circulating cooling water, which absorbs combustion heat of the engine, to a radiator or a bypass line; A water pump circulating the cooling water; And a water temperature sensor for detecting the temperature of the cooling water,

워터펌프와 연결되며, 워터펌프의 동작으로 공급되는 냉각수를 엔진 및 배기 열 교환기로 분배하는 분배라인에 장착되는 제2밸브; 상기 수온센서에서 검출되는 냉각수의 온도에 따라 제1밸브를 조정하여 엔진 및 배기열 교환기로 순환되는 냉각수의 양을 조정하는 제어부를 포함한다. A second valve connected to the water pump and mounted on a distribution line for distributing the cooling water supplied by the operation of the water pump to the engine and the exhaust heat exchanger; And a controller for adjusting the amount of the cooling water circulated to the engine and the exhaust heat exchanger by adjusting the first valve according to the temperature of the cooling water detected by the water temperature sensor.

또한, 본 발명의 특징에 따른 차량의 배기열 회수방법은, 엔진의 시동 온에 따라 냉각수의 온도를 검출하여 웜업 판정의 기준온도와 비교하는 과정; 냉각수의 온도가 기준온도 미만이면 엔진을 순환하는 냉각수의 양을 보다 배기열 교환기를 순환하는 냉각수의 양을 많게 조정하는 과정; 냉각수의 온도 상승으로 기준온도를 초과하면 배기열 교환기를 순환하는 냉각수의 양 보다 엔진을 순환하는 냉각수의 양을 많게 조정하는 과정을 포함한다.A method for recovering exhaust heat of a vehicle according to an aspect of the present invention includes the steps of detecting a temperature of a cooling water according to a start-up of an engine and comparing the temperature of the cooling water with a reference temperature of a warm- Adjusting the amount of the cooling water circulating the engine to a greater amount than the amount of the cooling water circulating the exhaust heat exchanger when the temperature of the cooling water is lower than the reference temperature; And increasing the amount of the cooling water circulating the engine more than the amount of cooling water circulating in the exhaust heat exchanger if the reference temperature is exceeded due to the temperature rise of the cooling water.

전술한 구성에 의하여 본 발명은 엔진의 시동 초기에 냉각수의 순환을 능동적으로 제어하여 엔진의 활성화 시간 단축과 이에 따른 연비 향상을 제공하고, 촉매의 활성화 시간을 단축시켜 에미션 안정화를 제공하는 효과가 기대된다.According to the above-described structure, the present invention provides an effect of actively controlling the circulation of the cooling water at the start of the engine to shorten the activation time of the engine, thereby improving the fuel economy and shortening the activation time of the catalyst It is expected.

본 발명은 촉매의 로딩량을 추가하지 않아도 안정된 에미션을 확보할 수 있어 원가 절감을 제공하고, 엔진오일의 온도를 빠르게 높일 수 있어 오일 마찰이 저감되어 각 구동부품의 마모가 최소화되어 내구성이 향상되는 효과가 기대된다.The present invention provides a stable emission without addition of a loading amount of the catalyst, thereby providing a cost reduction, and it is possible to rapidly raise the temperature of the engine oil, thereby reducing oil friction and minimizing wear of each driven component, thereby improving durability Is expected to be effective.

아래에서는 첨부된 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

본 발명은 여러 가지 상이한 형태로 구현될 수 있으므로, 여기에서 설명하는 실시예에 한정되지 않으며, 도면에서 본 발명을 명확하게 설명하기 위하여 설명과 관계없는 부분은 생략하였다.The present invention can be embodied in various different forms, and thus the present invention is not limited to the embodiments described herein.

도 1은 본 발명의 실시예에 따른 차량의 배기열 회수장치를 개략적으로 도시한 도면이다.1 is a view schematically showing an exhaust heat recovery apparatus for a vehicle according to an embodiment of the present invention.

본 발명은 엔진(10), 라디에이터(20), 배기열 교환기(30), 보조기구(40), 워터펌프(50), 수온센서(60), 제어부(70), 제1밸브(80) 및 제2밸브(90)를 포함하여 구성된다.The present invention relates to an air conditioning system comprising an engine (10), a radiator (20), an exhaust heat exchanger (30), an auxiliary device (40), a water pump (50), a water temperature sensor (60), a control part (70) 2 valve (90).

라디에이터(20)는 엔진(10)의 웜업이 충분하게 이루어져 연소열을 흡수한 냉각수의 순환이 실행되는 냉각수에 흡수된 열을 방열시킨다.The radiator 20 sufficiently warms up the engine 10 to dissipate the heat absorbed by the cooling water in which the circulation of the cooling water absorbing the combustion heat is performed.

배기열 교환기(30)는 촉매의 후단에 장착되어 냉각수의 순환이 제공되며, 엔진의 시동 초기에 배기가스의 열에너지를 순환되는 냉각수에 전열시켜 냉각수의 온도를 조기에 상승시킴으로써 엔진(10)의 웜업 시간을 단축한다.The exhaust heat exchanger 30 is installed at the rear end of the catalyst and is provided with circulation of cooling water. The heat energy of the exhaust gas is transferred to the circulating cooling water at an early stage of engine startup to raise the temperature of the cooling water early, .

보조기구(40)는 차량의 실내를 난방시키는 히터 등으로 냉각수의 순환을 통해 난방을 제공한다.The auxiliary mechanism (40) provides heating through the circulation of the cooling water to a heater or the like for heating the interior of the vehicle.

워터펌프(50)는 가변형 워터펌프로 구성되며, 엔진(10)의 시동이 온 되더라도 냉각수의 온도가 일정온도 이상으로 상승되지 않는 초기조건에서 오프되어 냉각수의 순환이 제공되지 않도록 함으로써 불필요한 영역의 냉각을 차단시켜 엔진(10)의 웜업 시간을 단축하여 열손실을 줄이고 동시에 마찰저항의 조기 저감을 실현시켜 연비 향상을 제공하여 준다.The water pump 50 is constituted by a variable water pump and is turned off under an initial condition in which the temperature of the cooling water does not rise above a predetermined temperature even when the engine 10 is turned on so that circulation of the cooling water is not provided, Thereby shortening the warm-up time of the engine 10 to reduce the heat loss and at the same time to realize the early reduction of the frictional resistance, thereby improving the fuel economy.

온도센서(60)는 순환되는 냉각수의 온도를 검출하여 그에 대한 정보를 제어부(70)에 제공한다.The temperature sensor 60 detects the temperature of the circulating cooling water and provides the control unit 70 with information on the detected temperature.

제어부(70)는 엔진(10)의 시동이 온되면 온도센서(60)에서 검출되는 냉각수의 온도에 따라 워터펌프(50)의 동작과 제1밸브(80) 및 제2밸브(90)의 동작을 제어하여 엔진(10)의 웜업 시간과 엔진(10) 각부분의 조기 활성화를 실현시킨다.The controller 70 controls the operation of the water pump 50 and the operation of the first valve 80 and the second valve 90 according to the temperature of the cooling water detected by the temperature sensor 60 when the engine 10 is turned on So as to realize the warm-up time of the engine 10 and the early activation of each part of the engine 10.

제1밸브(80)는 냉각수의 순환라인에 설치되며, 제어부(80)의 제어에 따라 냉각수의 순환 경로를 결정한다.The first valve (80) is installed in the circulation line of the cooling water, and determines the circulation path of the cooling water under the control of the controller (80).

예를 들어 엔진(10)의 웜업이 완전하게 이루어진 정상 운전조건에서는 냉각수가 라디에이터(20)를 통해 순환되도록 하고, 엔진(10)의 웜업이 충분하게 이루어지지 않은 상태에서는 라디에이터(20)를 거치지 않고 바이패스 라인을 통해 순환되도록 한다.For example, in a normal operating condition in which the engine 10 is fully warmed up, the cooling water is circulated through the radiator 20, and when the engine 10 is not sufficiently warmed up, Cycle through the bypass line.

이때, 보조기구(40)로는 상황에 따라 냉각수 순환이 실행된다.At this time, cooling water circulation is performed in the auxiliary mechanism (40) according to the situation.

제2밸브(90)는 전자식 제어밸브로 구성되어 워터펌프(50)와 엔진(10) 및 배기열 교환기(30)의 냉각수 순환경로에 설치되며, 제어부(70)의 제어에 따라 워터펌프(50)의 동작으로 순환되는 냉각수의 경로를 조정한다.The second valve 90 is constituted by an electronic control valve and is installed in the cooling water circulation path of the water pump 50 and the engine 10 and the exhaust heat exchanger 30. The second valve 90 is connected to the water pump 50 under the control of the control unit 70, Thereby adjusting the flow path of the cooling water circulated by the operation of FIG.

예를 들어, 냉각수의 온도가 설정온도 미만으로 엔진(10)의 충분한 웜업이 이루어지지 않는 상태에서는 제어부(70)의 제어에 따라 엔진(10)을 순환하는 냉각수의 양보다 배기열 교환기(30)를 순환하는 냉각수의 양이 많게 하여 냉각수의 신속한 온도 상승을 유도한다.For example, when the temperature of the cooling water is lower than the set temperature and the engine 10 is not sufficiently warmed up, the amount of cooling water circulating in the engine 10 under the control of the controller 70 is lower than the amount of cooling water circulating in the engine 10 The amount of the circulating cooling water is increased to induce a rapid temperature rise of the cooling water.

또한, 냉각수의 온도가 설정온도를 초과하여 엔진(10)의 웜업이 완료된 상태 에서는 제어부(70)의 제어에 따라 배기열 교환기(30)를 순환하는 냉각수의 양을 최소화하거나 차단하고, 엔진(10)을 순환하는 냉각수의 양을 최대로 한다.When the temperature of the cooling water exceeds the set temperature and the warming up of the engine 10 is completed, the amount of cooling water circulating through the exhaust heat exchanger 30 is minimized or cut off under the control of the controller 70, Thereby maximizing the amount of cooling water circulating in the circulation passage.

상기 제1밸브(80) 및 제2밸브(90)는 통상적인 서모스탯으로 구성되거나 제어부(70)의 제어에 의해 동작되는 전자식 밸브로 적용될 수 있다.The first valve 80 and the second valve 90 may be implemented with an ordinary thermostat or an electronic valve operated under the control of the controller 70.

전술한 바와 같은 기능이 포함되는 본 발명의 동작에 대하여 도 2를 참조하여 설명하면 다음과 같다.The operation of the present invention including the above-described functions will be described with reference to FIG.

엔진(10)이 시동 오프를 유지하는 상태에서(S101) 제어부(70)는 엔진(10)의 시동 온이 검출되면(S102) 수온센서(60)에서 제공되는 냉각수의 온도를 검출하여(S103), 냉각수의 온도가 냉시동 판정조건인 기준온도(A℃) 미만인지를 판단한다(S104).The control unit 70 detects the temperature of the cooling water provided by the water temperature sensor 60 (S103) when the start-up of the engine 10 is detected (S102) , It is determined whether the temperature of the cooling water is lower than the reference temperature (A DEG C) which is the cold start determination condition (S104).

상기 S104의 판단에서 냉각수의 온도가 기준온도(A℃)를 초과하는 상태이면냉각수의 온도에 따라 제1밸브(80)의 동작을 제어하는 통상적인 냉각수 순환 제어를 실행한다(S105).If it is determined in step S104 that the temperature of the cooling water exceeds the reference temperature (A DEG C), a normal cooling water circulation control for controlling the operation of the first valve 80 is performed according to the temperature of the cooling water (S105).

그러나, 상기 S104의 판단에서 냉각수의 온도가 기준온도(A℃) 미만이면 냉시동으로 판정하고(S106), 제1밸브(80)를 제어하여(S107) 냉각수가 라디에이터(20)를 순환하지 않고 바이패스 라인을 통해 순환되도록 한다(S108).However, when the temperature of the cooling water is lower than the reference temperature (A 占 폚) in the determination of S104, it is determined that the engine is cold start (S106), the first valve 80 is controlled (S107), the cooling water does not circulate the radiator 20 And circulated through the bypass line (S108).

그리고, 제어부(70)는 워터펌프(50)를 작동 온시켜 냉각수의 순환이 이루어질 수 있도록 하고(S109), 동시에 제2밸브(90)를 제어하여(S110) 엔진(10)을 순환하는 냉각수의 양보다 배기열 교환기(30)를 순환하는 냉각수의 양이 많게 하여 냉각수의 신속한 온도 상승을 유도한다(S111).The control unit 70 controls the second valve 90 at the same time (S110) so that the water pump 50 is turned on to enable the circulation of the cooling water (S109) The amount of the cooling water circulating in the exhaust heat exchanger 30 is larger than the amount of the cooling water in the exhaust heat exchanger 30 (S111).

따라서, 배기열 교환기(30)의 순환과 엔진(10)의 연소열에 의해 냉각수의 온도가 상승하여 웜업 판정의 기준온도(B℃)를 초과하였는지를 판단한다(S112).Therefore, it is determined whether the temperature of the cooling water has risen due to the circulation of the exhaust heat exchanger 30 and the combustion heat of the engine 10 to exceed the reference temperature (B 占 폚) of the warm-up determination (S112).

상기 S112에서 냉각수의 온도가 웜업 판정이 기준온도(B℃)를 초과한 상태이면 제어부(70)는 엔진(10)에 대하여 웜업 완료로 판정하고(S113), 제1밸브(80)를 제어하여(S114) 냉각수를 라디에이터(20)로 순환시킨다(S115).If the temperature of the cooling water exceeds the reference temperature (B 占 폚) in S112, the controller 70 determines that the engine 10 has been warmed up (S113), controls the first valve 80 (S114) The cooling water is circulated to the radiator 20 (S115).

동시에 제2밸브(90)를 제어하여(S116) 배기열 교환기(30)를 순환하는 냉각수의 양을 최소화하거나 차단하고, 엔진(10)을 순환하는 냉각수의 양을 최대로 유지한다(S117).At the same time, the amount of the cooling water circulating in the exhaust heat exchanger 30 is minimized or blocked by controlling the second valve 90 (S116), and the amount of the cooling water circulating the engine 10 is maintained at the maximum (S117).

이상에서 본 발명의 실시예에 대하여 상세하게 설명하였지만 본 발명의 권리범위는 이에 한정되는 것이 아니고 다음의 청구범위에서 정의하고 있는 본 발명의 기본 개념을 이용한 당업자의 여러 변형 및 개량 형태 또한 본 발명의 권리범위에 포함된다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is included in the scope of right.

도 1은 본 발명 실시예에 따른 차량의 배기열 회수장치를 개략적으로 도시한 도면이다.1 is a view schematically showing an exhaust heat recovery apparatus for a vehicle according to an embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 차량에서 배기열 회수 절차를 도시한 흐름도이다. 2 is a flowchart illustrating an exhaust heat recovery procedure in a vehicle according to an embodiment of the present invention.

Claims (5)

엔진의 연소열을 흡수한 냉각수를 순환시켜 방열시키는 라디에이터;A radiator circulating the cooling water absorbing combustion heat of the engine to radiate heat; 촉매의 후단에 장착되어 배기가스의 열에너지를 순환되는 냉각수에 전열시켜 냉각수의 온도를 상승시키는 배기열 교환기;An exhaust heat exchanger mounted on a rear end of the catalyst for transferring heat energy of the exhaust gas to cooling water circulated to increase the temperature of the cooling water; 엔진의 연소열을 흡수한 냉각수를 라디에이터 혹은 바이패스 라인으로 순환시키는 제1밸브;A first valve for circulating cooling water, which absorbs combustion heat of the engine, to a radiator or a bypass line; 냉각수를 순환시키는 워터펌프;A water pump circulating the cooling water; 냉각수의 온도를 검출하는 수온센서;A water temperature sensor for detecting the temperature of the cooling water; 를 포함하며,/ RTI > 워터펌프와 연결되며, 워터펌프의 동작으로 공급되는 냉각수를 엔진 및 배기열 교환기로 분배하는 분배라인에 장착되는 제2밸브;A second valve connected to the water pump and mounted on a distribution line for distributing the cooling water supplied by the operation of the water pump to the engine and the exhaust heat exchanger; 상기 수온센서에서 검출되는 냉각수의 온도에 따라 제1밸브를 조정하여 엔진 및 배기열 교환기로 순환되는 냉각수의 양을 조정하는 제어부;A controller for adjusting the amount of the cooling water circulated to the engine and the exhaust heat exchanger by adjusting the first valve according to the temperature of the cooling water detected by the water temperature sensor; 를 더 포함하되, Further comprising: 상기 제어부는 냉각수의 온도가 기준온도 미만이면 제2밸브를 제어하여 엔진을 순환하는 냉각수의 양보다 배기열 교환기를 순환하는 냉각수의 양을 많게 조정하는 것을 특징으로 하는 차량의 배기열 회수장치.Wherein the controller controls the second valve to adjust the amount of cooling water circulating in the exhaust heat exchanger more than the amount of cooling water circulating in the engine when the temperature of the cooling water is less than the reference temperature. 삭제delete 제1항에 있어서,The method according to claim 1, 상기 제어부는 냉각수의 온도가 기준온도를 초과하면 제2밸브를 제어하여 배기열 교환기를 순환하는 냉각수의 양을 최소화하거나 차단하고, 엔진을 순환하는 냉각수의 양을 최대로 조정하는 것을 특징으로 하는 차량의 배기열 회수장치.Wherein the controller controls the second valve to minimize or shut off the amount of cooling water circulating through the exhaust heat exchanger and to adjust the amount of cooling water circulating the engine to the maximum when the temperature of the cooling water exceeds the reference temperature Exhaust heat recovery device. 엔진의 시동 온에 따라 냉각수의 온도를 검출하여 웜업 판정의 기준온도와 비교하는 과정;Detecting the temperature of the cooling water in accordance with the start-up of the engine and comparing the detected temperature with the reference temperature of the warm-up determination; 냉각수의 온도가 기준온도 미만이면 엔진을 순환하는 냉각수의 양을 보다 배기열 교환기를 순환하는 냉각수의 양을 많게 조정하는 과정;Adjusting the amount of the cooling water circulating the engine to a greater amount than the amount of the cooling water circulating the exhaust heat exchanger when the temperature of the cooling water is lower than the reference temperature; 냉각수의 온도 상승으로 기준온도를 초과하면 배기열 교환기를 순환하는 냉각수의 양 보다 엔진을 순환하는 냉각수의 양을 많게 조정하는 과정;Adjusting the amount of cooling water circulating in the engine more than the amount of cooling water circulating in the exhaust heat exchanger if the reference temperature is exceeded due to the temperature rise of the cooling water; 을 포함하는 차량의 배기열 회수방법.And exhausting the exhaust heat. 제4항에 있어서,5. The method of claim 4, 상기 냉각수의 온도에 따라 엔진 및 배기열 교환기로 순환되는 냉각수 양의 조정은 워터펌프와 연결되는 분기라인에 설치된 제2밸브에 의해 실행되는 것을 특징으로 하는 차량의 배기열 회수방법.Wherein the adjustment of the amount of cooling water circulated to the engine and the exhaust heat exchanger according to the temperature of the cooling water is performed by a second valve installed in a branch line connected to the water pump.
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US12/847,728 US20110126783A1 (en) 2009-12-02 2010-07-30 Exhaust Heat Recovery System of Vehicle and Method Thereof
CN2010102527868A CN102086797A (en) 2009-12-02 2010-08-13 Exhaust heat recovery system of vehicle and method thereof
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