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KR102075137B1 - Method for controlled cooling system of vehicles - Google Patents

Method for controlled cooling system of vehicles Download PDF

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Publication number
KR102075137B1
KR102075137B1 KR1020180104641A KR20180104641A KR102075137B1 KR 102075137 B1 KR102075137 B1 KR 102075137B1 KR 1020180104641 A KR1020180104641 A KR 1020180104641A KR 20180104641 A KR20180104641 A KR 20180104641A KR 102075137 B1 KR102075137 B1 KR 102075137B1
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KR
South Korea
Prior art keywords
water temperature
temperature sensor
control valve
flow control
engine
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KR1020180104641A
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Korean (ko)
Inventor
이수호
최의철
박준식
김용훈
권민영
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현대자동차(주)
기아자동차(주)
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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
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • 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
    • F01P2031/00—Fail safe
    • F01P2031/36—Failure of coolant pump

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to technology that enables control of a cooling water temperature even if a failure of a water temperature sensor occurs. According to the present invention, disclosed is a method for controlling a cooling system for a vehicle, which controls the operation of a flow control valve using the cooling water temperature measured by an engine inlet water temperature sensor, diagnoses whether the water temperature sensors have failed, and controls the operation of the flow control valve using the cooling water temperature measured by a head outlet water temperature sensor.

Description

차량용 냉각시스템 제어방법{METHOD FOR CONTROLLED COOLING SYSTEM OF VEHICLES}Vehicle cooling system control method {METHOD FOR CONTROLLED COOLING SYSTEM OF VEHICLES}

본 발명은 수온센서의 고장이 발생하더라도 냉각수온의 제어가 가능하도록 한 차량용 냉각시스템 제어방법에 관한 것이다.The present invention relates to a vehicle cooling system control method that enables the control of the cooling water temperature even when a water temperature sensor fails.

차량의 시동 초기 냉간 조건에서 엔진은 충분히 웜업된 조건 대비 연비가 좋지 않다. 그 이유는, 냉간시 오일 온도가 낮은 상태에서 오일의 높은 점도로 인해 엔진의 마찰이 크고, 또한 실린더 벽면의 온도가 낮아 벽면으로의 열손실이 크며, 연소 안정성이 떨어지기 때문이다.In cold conditions at the start of the vehicle, the engine is less fuel-efficient than a fully warmed up condition. The reason is that the friction of the engine is large due to the high viscosity of the oil in the state of low oil temperature during cold, and the heat loss to the wall is low because the temperature of the cylinder wall is low, and combustion stability is inferior.

따라서, 차량의 연비 향상 및 엔진 내구성 향상을 위해서는 시동 초기에 엔진의 온도를 정상 온도로 빠르게 승온시켜주는 것이 필요하다.Therefore, in order to improve fuel economy and engine durability of the vehicle, it is necessary to quickly increase the temperature of the engine to a normal temperature at the initial stage of startup.

이를 위해, 차량의 냉간 시동시, 엔진에서 발생하는 열을 최대한 엔진을 웜업하는데 이용함으로써, 연비와 출력을 향상하면서, 배출가스 저감 효과를 얻도록 하는 기술이 다양하게 제안되고 있으며, 대표적으로 유동정지밸브, 클러치 타입 워터펌프, 전동식 워터펌프, 통합유량제어밸브 등을 들 수 있다.To this end, various technologies have been proposed to use the heat generated by the engine to warm up the engine as much as possible during cold start of the vehicle, thereby improving fuel efficiency and output while reducing emissions. Valves, clutch type water pumps, electric water pumps, integrated flow control valves, and the like.

이 중, 통합유량제어밸브는 엔진 내에 냉각수를 단순 정지하는 제어 뿐만 아니라 냉각수의 유량을 미소하게 가변하여 제어함으로써, 오일 워머 혹은 ATF 워머 등에 승온된 냉각수를 우선 공급하게 되고, 이에 엔진 오일과 변속기 오일, 그리고 엔진 전체의 온도를 동시에 빠르게 승온할 수 있어 최적의 신속한 엔진 웜업을 구사할 수가 있다.Among these, the integrated flow control valve not only controls the simple stop of the coolant in the engine but also slightly changes the flow rate of the coolant, thereby supplying the coolant heated to the oil warmer or the ATF warmer, and thus the engine oil and the transmission oil. In addition, the temperature of the entire engine can be rapidly increased at the same time, enabling optimum engine warm-up.

한편, 기존의 통합유량제어밸브가 구비된 냉각시스템에는 엔진입구측에 수온센서가 배치되고, 상기 수온센서에서 측정된 냉각수온을 이용하여 통합유량제어밸브의 작동을 제어하고, 이에 냉각수온을 조절한다.On the other hand, in the existing cooling system equipped with an integrated flow control valve, a water temperature sensor is disposed on the engine inlet side, using the cooling water temperature measured by the water temperature sensor to control the operation of the integrated flow control valve, thereby adjusting the cooling water temperature do.

그런데, 기존 냉각시스템의 경우 상기 수온센서의 고장이 발생하는 경우, 냉각수온을 측정할 수 없어 통합유량제어밸브의 제어가 불가능하게 되고, 이에 엔진이 과열되거나 페일이 발생하는 문제가 있었다.By the way, in the case of the existing cooling system failure occurs when the water temperature sensor, the temperature of the cooling water can not be measured, it becomes impossible to control the integrated flow control valve, there is a problem that the engine is overheated or failure occurs.

상기의 배경기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진 자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

JP 2004-137981 AJP 2004-137981 A

본 발명은 전술한 바와 같은 문제점을 해결하기 위하여 안출한 것으로, 수온센서의 고장이 발생하더라도 냉각수온의 제어가 가능하도록 한 차량용 냉각시스템 제어방법을 제공하는 데 있다.The present invention has been made to solve the above problems, and to provide a vehicle cooling system control method that enables the control of the cooling water temperature even if a failure of the water temperature sensor occurs.

상기와 같은 목적을 달성하기 위한 본 발명의 구성은, 엔진의 입구측에 엔진입구수온센서가 설치되고, 실린더헤드 출구측에 헤드출구수온센서가 설치되며, 실린더블록 출구측에 블록출구수온센서가 설치되고, 엔진 후단에 유량제어밸브가 설치되며, 상기 유량제어밸브와 실린더헤드의 냉각수출구가 상시 개방 상태로 연결되며, 상기 유량제어밸브와 실린더블록의 냉각수출구 사이에 유량제어밸브의 작동에 의해 개도량 조절이 가능한 블록포트가 마련되는 냉각시스템으로서, 컨트롤러가 엔진입구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계; 컨트롤러가 수온센서들의 고장 여부를 진단하는 단계; 및 컨트롤러가 상기 엔진입구수온센서의 고장 진단시, 헤드출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계;를 포함하는 것을 특징으로 할 수 있다.The configuration of the present invention for achieving the above object, the engine inlet water temperature sensor is installed on the inlet side of the engine, the head outlet water temperature sensor is installed on the cylinder head outlet side, the block outlet water temperature sensor on the cylinder block outlet side A flow rate control valve is installed at the rear end of the engine, and the flow rate control valve and the cooling outlet of the cylinder head are normally open, and the flow rate control valve is operated between the flow rate control valve and the cooling outlet of the cylinder block. A cooling system provided with a block port capable of adjusting an opening amount, comprising: a controller controlling an operation of a flow control valve using a cooling water temperature measured by an engine inlet water temperature sensor; The controller diagnosing whether or not the water temperature sensors have failed; And when the controller diagnoses the failure of the engine inlet water temperature sensor, controlling the operation of the flow control valve using the cooling water temperature measured by the head outlet water temperature sensor.

상기 엔진입구수온센서와 헤드출구수온센서의 고장 진단시, 블록포트를 개방하는 단계; 상기 블록출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계;를 포함할 수 있다.Opening a block port when diagnosing a failure of the engine inlet water temperature sensor and the head outlet water temperature sensor; And controlling the operation of the flow control valve using the cooling water temperature measured by the block outlet water temperature sensor.

상기 모든 수온센서의 고장 진단시, 유량제어밸브에 연결된 모든 포트를 개방하는 단계;를 더 포함할 수 있다.Upon diagnosing the failure of all the water temperature sensors, opening all ports connected to the flow control valve may be further included.

본 발명의 구성은, 엔진의 전단에 엔진입구수온센서가 설치되고, 엔진 후단에 유량제어밸브가 설치되고, 엔진과 유량제어밸브 사이에 엔진출구수온센서가 설치되는 냉각시스템으로서, 컨트롤러가 엔진입구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계; 컨트롤러가 수온센서들의 고장 여부를 진단하는 단계; 및 컨트롤러가 상기 엔진입구수온센서의 고장 진단시, 엔진출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계;를 포함하는 것을 특징으로 할 수 있다.The configuration of the present invention is a cooling system in which the engine inlet water temperature sensor is installed at the front of the engine, the flow control valve is installed at the rear end of the engine, and the engine outlet water temperature sensor is installed between the engine and the flow control valve. Controlling the operation of the flow control valve using the cooling water temperature measured by the water temperature sensor; The controller diagnosing whether or not the water temperature sensors have failed; And when the controller diagnoses the failure of the engine inlet water temperature sensor, controlling the operation of the flow control valve using the cooling water temperature measured by the engine outlet water temperature sensor.

상기한 과제 해결수단을 통해 본 발명은, 일부 수온센서의 페일이 발생한 경우, 정상 수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하고, 모든 수온센서의 페일이 발생한 경우에는 모든 포트를 개방하여 냉각수를 유동하도록 제어함으로써, 수온센서 고장시에 발생할 수 있는 엔진 과열 및 페일 현상을 방지하는 효과가 있다.The present invention through the above problem solving means, when the failure of some of the water temperature sensor, using the cooling water temperature measured by the normal water temperature sensor to control the operation of the flow control valve, when all of the water temperature sensor failure By controlling the flow of the coolant by opening the port, there is an effect of preventing the engine overheating and failing that may occur when the water temperature sensor failure.

도 1은 본 발명에 적용 가능한 냉각시스템 구성의 실시예를 도시한 도면.
도 2는 본 발명에 따른 냉각시스템 제어방법을 나타낸 흐름도.
도 3은 본 발명에 따른 유량제어밸브의 회전각도에 대한 각 포트의 개도선도.
도 4는 및 도 5는 본 발명에 적용 가능한 냉각시스템 구성의 다른 실시예를 도시한 도면.1 is a view showing an embodiment of a cooling system configuration applicable to the present invention.
2 is a flow chart showing a cooling system control method according to the present invention.
Figure 3 is an opening diagram of each port for the rotation angle of the flow control valve according to the present invention.
4 and 5 show another embodiment of a cooling system configuration applicable to the present invention.

본 발명의 바람직한 실시예를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

도 1은 본 발명에 적용 가능한 차량용 냉각시스템의 구성을 간략하게 예시한 도면으로, 엔진(20)의 입구측 유로 상에 엔진입구수온센서(WTS2)가 설치되고, 엔진(20) 실린더헤드의 출구측 유로 상에 헤드출구수온센서(WTS1)가 설치되며, 엔진(20) 실린더블록의 출구측 유로 상에 블록출구수온센서(WTS3)가 설치된다.1 is a view briefly illustrating a configuration of a vehicle cooling system applicable to the present invention. An engine inlet water temperature sensor WTS2 is installed on an inlet side flow path of an engine 20, and an outlet of a cylinder head of an engine 20 is provided. The head outlet water temperature sensor WTS1 is installed on the side flow path, and the block outlet water temperature sensor WTS3 is installed on the outlet side flow path of the cylinder block of the engine 20.

그리고, 상기 헤드출구수온센서(WTS1)의 후단에 통합유량제어밸브(이하, '유량제어밸브'로 칭함)(10)가 설치된다. 이러한, 유량제어밸브(10)에는 다수의 포트가 마련되는데, 상기 유량제어밸브(10) 내부에 구비된 밸브바디의 회전 작동을 통해 각 포트의 개도량을 한 번에 가변 제어하게 되고, 이에 각 포트를 통해 유동되는 냉각수 유동량을 조절할 수 있게 된다.An integrated flow control valve (hereinafter referred to as a "flow control valve") 10 is installed at the rear end of the head outlet water temperature sensor WTS1. Such, the flow control valve 10 is provided with a plurality of ports, through the rotational operation of the valve body provided in the flow control valve 10 to control the opening amount of each port at a time, thereby The amount of coolant flowing through the port can be controlled.

예컨대, 상기 유량제어밸브(10)에는 적어도 3개 이상의 토출포트가 각각 마련될 수 있고, 상기 각 토출포트는 라디에이터(30)와, 오일쿨러(40) 등의 오일열교환기와, 히터코어(50)가 배치된 유로에 각각 연결이 된다.For example, the flow control valve 10 may be provided with at least three discharge ports, and each discharge port may include a radiator 30, an oil heat exchanger such as an oil cooler 40, and a heater core 50. Is connected to each of the flow paths are arranged.

특히, 라디에이터(30)가 배치된 유로에 연결된 라디에이터포트(11)와, 히터코어(50)가 배치된 유로에 연결되는 히터코어포트(12)는, 상기 유량제어밸브(10)의 작동에 의해 그 개도량이 조절되어 상기 유로들에 공급되는 냉각수의 유량을 조절할 수 있다.In particular, the radiator port 11 connected to the flow path in which the radiator 30 is disposed and the heater core port 12 connected to the flow path in which the heater core 50 is arranged are operated by the flow control valve 10. The opening amount is adjusted to adjust the flow rate of the cooling water supplied to the flow paths.

아울러, 상기 엔진(20) 실린더블록의 냉각수출구와, 실린더헤드의 냉각수출구가 상기 유량제어밸브(10)에 각각 독립적으로 연결이 되고, 이때에 상기 유량제어밸브(10)와 실린더헤드의 냉각수출구는 상시 개방된 상태로 연결이 된다.In addition, the cooling outlet of the cylinder block of the engine 20 and the cooling outlet of the cylinder head are connected to the flow control valve 10 independently, and at this time, the cooling outlet of the flow control valve 10 and the cylinder head. The connection is always open.

다만, 상기 실린더블록의 냉각수출구와 연결되는 유량제어밸브(10)에는 블록포트(13)가 마련되고, 상기 블록포트(13)는 상기 유량제어밸브(10)의 작동에 의해 그 개도량이 조절되어, 실린더블록에서 유량제어밸브(10)에 토출되는 냉각수의 유량을 조절할 수 있게 구성이 된다. However, a block port 13 is provided at the flow control valve 10 connected to the cooling outlet of the cylinder block, and the opening amount of the block port 13 is controlled by the operation of the flow control valve 10. The cylinder block is configured to adjust the flow rate of the cooling water discharged to the flow control valve 10.

한편, 본 발명에 따른 차량용 냉각시스템을 제어하는 방법으로, 정상운전조건에서 유량제어밸브(10)에 활용되는 수온센서의 고장시에도 냉각수온을 측정하여 유량제어밸브(10)를 안정적으로 제어할 수 있다.On the other hand, as a method for controlling the vehicle cooling system according to the present invention, even in the case of failure of the water temperature sensor utilized in the flow control valve 10 under normal operating conditions to measure the cooling water temperature to control the flow control valve 10 stably. Can be.

도 1 및 도 2를 참조하여 설명하면, 본 발명은 컨트롤러(C)가 엔진입구수온센서(WTS2)에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하는 단계와, 컨트롤러(C)가 수온센서들의 고장 여부를 진단하는 단계 및, 컨트롤러(C)가 상기 엔진입구수온센서(WTS2)의 고장 진단시, 헤드출구수온센서(WTS1)에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하는 단계를 포함하여 구성이 된다.Referring to Figures 1 and 2, the present invention, the controller (C) controls the operation of the flow control valve 10 using the cooling water temperature measured by the engine inlet water temperature sensor (WTS2), and the controller ( C) diagnosing the failure of the water temperature sensors, and when the controller C diagnoses the failure of the engine inlet water temperature sensor WTS2, the flow control valve using the cooling water temperature measured by the head outlet water temperature sensor WTS1. And controlling the operation of (10).

여기서, 상기 수온센서의 고장 진단은 EMS(엔진 메니지먼트 시스템)에서 단선/단락코드를 인식하는 경우일 수 있고, 냉각수온 신호가 들어오기는 하나 그 신호값의 오차가 큰 경우에 고장으로 진단할 수 있다.Here, the fault diagnosis of the water temperature sensor may be a case of recognizing a disconnection / short code in an EMS (engine management system), and when the coolant temperature signal is input but the error of the signal value is large, it may be diagnosed as a fault. have.

즉, 모든 수온센서가 정상인 일반적인 주행상황에서는 엔진입구수온센서(WTS2)에서 측정된 냉각수온을 이용하여 유량제어밸브(10)를 제어함으로써, 냉각수온을 조절하게 된다.That is, in a general driving situation in which all the water temperature sensors are normal, the cooling water temperature is controlled by controlling the flow control valve 10 using the cooling water temperature measured by the engine inlet water temperature sensor WTS2.

하지만, 상기 엔진입구수온센서(WTS2)의 페일이 발생하는 경우에는, 엔진입구수온센서(WTS2)에서 측정되는 냉각수온 신호가 들어오지 않거나 부정확하므로, 헤드출구수온센서(WTS1)에서 측정되는 냉각수온으로 대체하여 유량제어밸브(10)의 작동을 제어하게 되고, 이에 엔진(20)이 과열되거나 페일이 발생하는 것을 방지하게 된다.However, when a failure of the engine inlet water temperature sensor WTS2 occurs, the cooling water temperature signal measured by the engine inlet water temperature sensor WTS2 does not come in or is incorrect, and thus the cooling water temperature measured by the head outlet water temperature sensor WTS1 is used. Subsequently, the operation of the flow control valve 10 is controlled, thereby preventing the engine 20 from overheating or failing.

한편, 본 발명에서는 상기 엔진입구수온센서(WTS2)와 헤드출구수온센서(WTS1)의 고장 진단시, 블록포트를 개방하는 단계와, 상기 블록출구수온센서(WTS3)에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하는 단계를 더 포함하여 구성이 된다.On the other hand, in the present invention, in the failure diagnosis of the engine inlet water temperature sensor (WTS2) and the head outlet water temperature sensor (WTS1), opening the block port, and using the cooling water temperature measured by the block outlet water temperature sensor (WTS3) It further comprises the step of controlling the operation of the flow control valve 10.

즉, 블록포트를 개방하여 이른바 가변 분리냉각을 해제하면, 엔진(20)으로 유입되는 냉각수가 실린더헤드 뿐만 아니라 실린더블록으로도 통과하기 때문에 실린더블록 출구에서 측정되는 냉각수온과 실린더헤드 출구에서 측정되는 냉각수온이 서로 비슷해지게 된다.That is, when the block port is opened and the so-called variable separation cooling is released, the cooling water temperature measured at the cylinder block outlet and the cylinder head outlet are measured because the coolant flowing into the engine 20 passes through the cylinder block as well as the cylinder head. Cooling water temperatures are similar to each other.

따라서, 엔진입구수온센서(WTS2) 뿐만 아니라 헤드출구수온센서(WTS1)도 페일이 발생한 경우에는, 블록출구수온센서(WTS3)에서 측정된 냉각수온을 활용하여 유량제어밸브(10)의 작동을 제어하게 된다.Therefore, when the head inlet water temperature sensor WTS1 as well as the engine inlet water temperature sensor WTS2 fail, the operation of the flow control valve 10 is controlled by utilizing the cooling water temperature measured by the block outlet water temperature sensor WTS3. Done.

앞서 기재된 가변 분리냉각(Split Cooling) 기술에 대해 간단하게 설명하면, 실린더헤드 대비하여 실린더블록의 냉각수 유량을 감소시키면, 실린더블록의 온도가 실린더헤드의 온도에 비해 낮게 제어가 된다.Briefly describing the variable split cooling technology described above, if the coolant flow rate of the cylinder block is reduced compared to the cylinder head, the temperature of the cylinder block is controlled lower than the temperature of the cylinder head.

이처럼 제어하면, 연소실 헤드부는 낮은 온도로 제어가 되어 연소안정성을 유지하게 되고, 실린더블록은 냉각수 온도가 높게 제어되어 피스톤과 실린더 라이너의 마찰이 감소되면서 연비를 저감하게 되는데, 이를 가변 분리냉각기술이라 일컫는다.In this way, the combustion chamber head is controlled at a low temperature to maintain combustion stability, and the cylinder block is controlled to have a high cooling water temperature to reduce fuel consumption while reducing friction between the piston and the cylinder liner, which is called a variable separation cooling technology. It is called.

이와 같은 가변 분리냉각 기술은 유량제어밸브(10)의 작동을 통해 블록포트의 개도량을 제어하여 구현이 되는 것으로, 예컨대 상기 유량제어밸브(10)의 내부에 밸브바디가 설치되고, 상기 밸브바디에 모터의 구동력이 제공되어 유량제어밸브(10)의 내부에서 소정각도 범위 내에서 회전 작동된다. Such a variable separation cooling technology is implemented by controlling the opening amount of the block port through the operation of the flow control valve 10, for example, a valve body is installed in the flow control valve 10, the valve body The driving force of the motor is provided to be rotated within a predetermined angle within the flow control valve 10.

그리고, 상기 밸브바디의 회전각도가 변화함에 따라 유량제어밸브(10)에 마련된 라디에이터포트(11)와, 히터코어포트(12) 및 블록포트(13)의 개방량이 조절되도록 밸브바디의 측면에 유량조절홀이 형성될 수 있다.In addition, as the rotation angle of the valve body changes, the radiator port 11 and the heater core port 12 and the block port 13 provided in the flow rate control valve 10 are adjusted so that the flow rate on the side of the valve body is adjusted. Control holes may be formed.

즉, 상기 밸브바디가 회전됨에 따라 각 유량조절홀이 그와 대향된 위치에 배치된 각 포트와 중첩되면 해당 포트가 개방되면서 냉각수의 유동이 이루어지고, 반대로 각 유량조절홀이 그와 대향된 위치에 배치된 각 포트와 겹쳐지지 않으면 해당 포트가 폐쇄되면서 상기 포트를 통해서는 냉각수의 유동이 이루어지지 않게 된다.That is, as the valve body is rotated, when each flow control hole overlaps each port disposed at a position opposite thereto, the corresponding port is opened and the coolant flows. If the ports do not overlap with each other, the ports are closed and no flow of coolant flows through the ports.

첨부 도면 도 3은 본 발명에 따른 유량제어밸브(10)의 회전각도에 대한 각 포트의 개도선도를 도시한 것으로서, 상기 개도선도의 X축은 밸브의 전체 회전각도(좌측 끝부분과 우측 끝부분 사이의 구간)이고, Y축은 각 포트의 개도율을 나타낸다.Figure 3 shows an opening diagram of each port with respect to the rotation angle of the flow control valve 10 according to the present invention, the X axis of the opening diagram is the overall rotation angle of the valve (between the left end and the right end) Section, and the Y axis represents the opening degree of each port.

즉, 유량제어밸브(10)의 작동에 의해 회전각도가 변화함에 따라 유량제어밸브(10)가 State2 내지 State8 구간 중 어느 한 구간에 위치할 수 있고, 각 구간에서 라디에이터포트(11)와 히터코어포트(12) 및 블록포트(13)의 개도량을 조절하여 냉각수의 유량을 조절할 수 있게 된다.That is, as the rotation angle is changed by the operation of the flow control valve 10, the flow control valve 10 may be located in any one of the state 2 to state 8 sections, and the radiator port 11 and the heater core in each section. By adjusting the opening amounts of the port 12 and the block port 13, the flow rate of the cooling water can be adjusted.

이에, 도시된 도면을 참조하면, 유량제어밸브(10)의 각도가 70°~ 100°구간에서 가변 분리냉각기술이 구현이 되고, 가변 분리냉각 기술의 해제가 요구되는 경우에는 모터의 PI제어를 통해 유량제어밸브(10)의 각도를 100°~ 160°구간에 위치함으로써, 블록포트가 개방되면서 가변 분리냉각을 해제하게 된다.Thus, referring to the drawing, the variable separation cooling technology is implemented in an angle of 70 ° to 100 ° between the angles of the flow control valve 10, and when the release of the variable separation cooling technology is required, the PI control of the motor is controlled. By positioning the angle of the flow control valve 10 in the 100 ° ~ 160 ° section through, the block port is opened to release the variable separation cooling.

더불어, 본 발명은 상기 모든 수온센서의 고장 진단시, 유량제어밸브(10)에 연결된 모든 포트를 개방하는 단계를 더 포함하여 구성이 된다.In addition, the present invention is configured to further include the step of opening all the ports connected to the flow control valve 10, when the failure diagnosis of all the water temperature sensor.

즉, 엔진입구수온센서(WTS2)와 헤드출구수온센서(WTS1) 뿐만 아니라, 블록출구수온센서(WTS3)도 페일이 발생한 경우에는, 냉각수온을 기반으로 유량제어밸브(10)의 제어가 이루어질 수 없으므로, 모든 포트가 개방된 위치(ex : 165°)로 유량제어밸브(10)를 이동하여 엔진(20)을 보호하게 된다.That is, in addition to the engine inlet water temperature sensor WTS2 and the head outlet water temperature sensor WTS1, as well as the block outlet water temperature sensor WTS3, when a failure occurs, the flow control valve 10 may be controlled based on the cooling water temperature. Therefore, all the ports are moved to the open position (ex: 165 °) flow control valve 10 to protect the engine 20.

한편, 도 4 및 도 5는 본 발명에 적용 가능한 냉각시스템의 다른 실시예들을 도시한 것으로, 엔진(20)의 전단에 엔진입구수온센서(WTS2)가 설치되고, 엔진(20) 후단에 유량제어밸브(10)가 설치되며, 엔진(20)과 유량제어밸브(10) 사이에 엔진출구수온센서가 설치된다.4 and 5 illustrate other embodiments of a cooling system applicable to the present invention, in which an engine inlet water temperature sensor (WTS2) is installed at a front end of an engine 20 and a flow rate control is provided at a rear end of the engine 20. The valve 10 is installed, and the engine outlet water temperature sensor is installed between the engine 20 and the flow control valve 10.

이 같은 구성의 냉각시스템을 제어하는 방법으로, 컨트롤러(C)가 엔진입구수온센서(WTS2)에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하는 단계와, 컨트롤러(C)가 수온센서들의 고장 여부를 진단하는 단계 및, 컨트롤러(C)가 상기 엔진입구수온센서(WTS2)의 고장 진단시, 엔진출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하는 단계를 포함하여 구성이 된다.As a method of controlling the cooling system having such a configuration, the controller C controls the operation of the flow control valve 10 by using the cooling water temperature measured by the engine inlet water temperature sensor WTS2, and the controller C. A step of diagnosing whether or not the water temperature sensors failure, and when the controller (C) diagnoses the failure of the engine inlet water temperature sensor (WTS2), the operation of the flow control valve 10 using the cooling water temperature measured by the engine outlet water temperature sensor The control is configured to include.

즉, 도 4의 경우, 모든 수온센서가 정상인 일반적인 주행상황에서는 엔진입구수온센서(WTS2)에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하고, 엔진입구수온센서(WTS2)의 페일시, 엔진출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어한다.That is, in the case of FIG. 4, in a general driving situation in which all the water temperature sensors are normal, the operation of the flow control valve 10 is controlled by using the cooling water temperature measured by the engine inlet water temperature sensor WTS2, and the engine inlet water temperature sensor WTS2. At the time of failure, the operation of the flow control valve 10 is controlled by using the cooling water temperature measured by the engine outlet water temperature sensor.

그리고, 도 5의 경우, 모든 수온센서가 정상인 일반적인 주행상황에서는 엔진(20) 전단에서 측정된 냉각수온을 기반으로 엔진입구 냉각수온을 모델링하여 유량제어밸브(10)의 작동을 제어하고, 엔진입구수온센서(WTS2)의 페일시, 엔진출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어한다.5, in the general driving situation in which all the water temperature sensors are normal, the engine inlet cooling water temperature is modeled based on the cooling water temperature measured at the front of the engine 20 to control the operation of the flow control valve 10, and the engine inlet. When the water temperature sensor WTS2 fails, the operation of the flow control valve 10 is controlled by using the cooling water temperature measured by the engine outlet water temperature sensor.

한편, 도 1 및 도 2를 참조하여 본 발명에 따른 냉각시스템의 제어과정을 설명하면, 냉각회로 내에 구비된 수온센서들의 페일이 발생하는지 진단한다.Meanwhile, referring to FIGS. 1 and 2, a control process of the cooling system according to the present invention is diagnosed as a failure of water temperature sensors provided in the cooling circuit.

진단 결과, 엔진입구수온센서(WTS2)의 고장 진단시(S10), 헤드출구수온센서(WTS1)에서 측정되는 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하고(S20), 이에 냉각수온을 조절한다.As a result of diagnosis, when the failure of the engine inlet water temperature sensor WTS2 is diagnosed (S10), the operation of the flow control valve 10 is controlled using the cooling water temperature measured by the head outlet water temperature sensor WTS1 (S20), and thus the coolant Adjust the on.

이 후, 엔진입구수온센서(WTS2)와 함께 헤드출구수온센서(WTS1)도 고장이 발생하는 경우(S30), 유량제어밸브(10)의 작동을 통해 블록포트를 개방하여 가변 분리냉각을 해제하고, 블록출구수온센서(WTS3)에서 측정되는 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하며(S40), 이에 냉각수온을 조절하게 된다.After that, when the head outlet water temperature sensor (WTS1) and the engine inlet water temperature sensor (WTS2) also fail (S30), the block port is opened by activating the flow control valve 10 to release the variable separation cooling. By using the cooling water temperature measured by the block outlet water temperature sensor (WTS3) to control the operation of the flow control valve 10 (S40), thereby controlling the cooling water temperature.

이 후, 엔진입구수온센서(WTS2)와, 헤드출구수온센서(WTS1)은 물론 블록출구수온센서(WTS3)마저도 고장이 발생하는 경우(S50), 유량제어밸브(10)를 작동하여 모든 포트가 개방되는 위치로 이동하도록 제어하게 된다(S60).After that, when the engine inlet water temperature sensor (WTS2), the head outlet water temperature sensor (WTS1), as well as the block outlet water temperature sensor (WTS3) fail (S50), all the ports are operated by operating the flow control valve 10. Control to move to the open position (S60).

따라서, 본 발명은 일부 수온센서의 페일이 발생한 경우, 정상 수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브(10)의 작동을 제어하고, 모든 수온센서의 페일이 발생한 경우에는 모든 포트를 개방하여 냉각수를 유동하도록 제어함으로써, 수온센서 고장시에 발생할 수 있는 엔진(20) 과열 및 페일 현상을 방지하게 된다.Accordingly, the present invention controls the operation of the flow control valve 10 by using the cooling water temperature measured by the normal water temperature sensor when a failure of some water temperature sensors occurs, and all ports are opened when a failure of all water temperature sensors occurs. By controlling the cooling water to flow, it is possible to prevent the engine 20 overheating and failing that may occur when the water temperature sensor failure.

한편, 본 발명은 상기한 구체적인 예에 대해서만 상세히 설명되었지만 본 발명의 기술사상 범위 내에서 다양한 변형 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속함은 당연한 것이다.On the other hand, the present invention has been described in detail with respect to the specific examples described above, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, it is natural that such variations and modifications belong to the appended claims. .

10 : 유량제어밸브
20 : 엔진
30 : 라디에이터
C : 컨트롤러
WTS1 : 헤드출구수온센서
WTS2 : 엔진입구수온센서
WTS3 : 블록출구수온센서10: flow control valve
20: engine
30: radiator
C: controller
WTS1: Head outlet water temperature sensor
WTS2: engine inlet water temperature sensor
WTS3: Block Exit Water Temperature Sensor

Claims (4)

엔진의 입구측에 엔진입구수온센서가 설치되고, 실린더헤드 출구측에 헤드출구수온센서가 설치되며, 실린더블록 출구측에 블록출구수온센서가 설치되고, 엔진 후단에 유량제어밸브가 설치되며, 상기 유량제어밸브와 실린더헤드의 냉각수출구가 상시 개방 상태로 연결되며, 상기 유량제어밸브와 실린더블록의 냉각수출구 사이에 유량제어밸브의 작동에 의해 개도량 조절이 가능한 블록포트가 마련되는 냉각시스템으로서,
컨트롤러가 엔진입구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계;
컨트롤러가 수온센서들의 고장 여부를 진단하는 단계; 및
컨트롤러가 상기 엔진입구수온센서의 고장 진단시, 헤드출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계;를 포함하는 차량용 냉각시스템 제어방법.The engine inlet water temperature sensor is installed at the inlet of the engine, the head outlet water temperature sensor is installed at the outlet of the cylinder head, the block outlet water temperature sensor is installed at the outlet of the cylinder block, and the flow control valve is installed at the rear of the engine. A cooling system in which a flow rate control valve and a cooling outlet of a cylinder head are connected to an open state at all times, and a block port capable of adjusting an opening amount by an operation of a flow control valve is provided between the flow control valve and a cooling outlet of a cylinder block.
The controller controlling the operation of the flow control valve using the cooling water temperature measured by the engine inlet water temperature sensor;
The controller diagnosing whether or not the water temperature sensors have failed; And
When the controller diagnoses the failure of the engine inlet water temperature sensor, controlling the operation of the flow control valve using the cooling water temperature measured by the head outlet water temperature sensor. 청구항 1에 있어서,
상기 엔진입구수온센서와 헤드출구수온센서의 고장 진단시, 블록포트를 개방하는 단계;
상기 블록출구수온센서에서 측정된 냉각수온을 이용하여 유량제어밸브의 작동을 제어하는 단계;를 포함하는 차량용 냉각시스템 제어방법.The method according to claim 1,
Opening a block port when diagnosing a failure of the engine inlet water temperature sensor and the head outlet water temperature sensor;
And controlling the operation of the flow control valve using the cooling water temperature measured by the block outlet water temperature sensor. 청구항 1에 있어서,
상기 모든 수온센서의 고장 진단시, 유량제어밸브에 연결된 모든 포트를 개방하는 단계;를 더 포함하는 것을 특징으로 하는 차량용 냉각시스템 제어방법.The method according to claim 1,
And opening all ports connected to the flow control valve when diagnosing the failure of all the water temperature sensors. 삭제delete
KR1020180104641A 2018-09-03 2018-09-03 Method for controlled cooling system of vehicles KR102075137B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000220454A (en) * 1999-01-27 2000-08-08 Unisia Jecs Corp Cooling fan control device in engine
JP2000274244A (en) * 1999-03-19 2000-10-03 Nidec Tosok Corp Cooling water controller for engine
JP2004137981A (en) 2002-10-18 2004-05-13 Nippon Thermostat Co Ltd Control method of electronically controlled thermostat
JP2015169166A (en) * 2014-03-10 2015-09-28 日立オートモティブシステムズ株式会社 Cooling device of internal combustion engine
KR20180055174A (en) * 2016-11-16 2018-05-25 현대자동차주식회사 Control method of engine having coolant control valve unit, and the control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000220454A (en) * 1999-01-27 2000-08-08 Unisia Jecs Corp Cooling fan control device in engine
JP2000274244A (en) * 1999-03-19 2000-10-03 Nidec Tosok Corp Cooling water controller for engine
JP2004137981A (en) 2002-10-18 2004-05-13 Nippon Thermostat Co Ltd Control method of electronically controlled thermostat
JP2015169166A (en) * 2014-03-10 2015-09-28 日立オートモティブシステムズ株式会社 Cooling device of internal combustion engine
KR20180055174A (en) * 2016-11-16 2018-05-25 현대자동차주식회사 Control method of engine having coolant control valve unit, and the control system

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