WO2014017677A1 - Device for controlling speed of cooling fan in construction machine according to temperature of exhaust gas - Google Patents

Device for controlling speed of cooling fan in construction machine according to temperature of exhaust gas Download PDF

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Publication number
WO2014017677A1
WO2014017677A1 PCT/KR2012/005932 KR2012005932W WO2014017677A1 WO 2014017677 A1 WO2014017677 A1 WO 2014017677A1 KR 2012005932 W KR2012005932 W KR 2012005932W WO 2014017677 A1 WO2014017677 A1 WO 2014017677A1
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WO
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Prior art keywords
exhaust gas
cooling fan
gas temperature
temperature
speed
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PCT/KR2012/005932
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French (fr)
Korean (ko)
Inventor
남명남
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볼보 컨스트럭션 이큅먼트 에이비
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Priority to PCT/KR2012/005932 priority Critical patent/WO2014017677A1/en
Publication of WO2014017677A1 publication Critical patent/WO2014017677A1/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
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
    • 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
    • F01P2025/44—Outlet manifold temperature

Definitions

  • the present invention relates to an apparatus for controlling the cooling fan speed of a construction machine according to the exhaust gas temperature, and more particularly, by using the exhaust gas temperature in front of the exhaust gas aftertreatment device for cooling fan speed control.
  • the present invention relates to an apparatus for controlling the cooling fan speed of a construction machine according to the exhaust gas temperature, by which the exhaust gas post-treatment efficiency can be improved by preventing overheating or undercooling to always maintain an appropriate exhaust gas temperature.
  • variable speed fan drive system also uses the temperature of the specific fluid to control the fan speed, so that the fan rotates rapidly even at low exhaust gas temperature, thereby reducing the temperature around the exhaust gas treatment device and simultaneously reducing the exhaust gas temperature. Ascending speed may be slowed to cause impurities in the exhaust aftertreatment device or regeneration may not be smooth.
  • the present invention was developed to solve the above problems, by using the temperature of the exhaust gas in front of the exhaust gas aftertreatment device to control the cooling fan rotation speed to prevent overheating or undercooling of the exhaust gas aftertreatment device, thereby always suitable exhaust gas. It is an object of the present invention to provide an apparatus for controlling the cooling fan speed of a construction machine according to the exhaust gas temperature, by which the temperature can be maintained to increase the efficiency of the exhaust gas aftertreatment.
  • Another purpose is to control the cooling fan speed of the construction machine according to the exhaust gas temperature to reduce the driving speed of the cooling fan when the exhaust gas temperature is low, thereby reducing the horsepower of the cooling fan to help reduce the fuel efficiency of the equipment.
  • Cooling fan speed control device of the construction machine according to the exhaust gas temperature according to the present invention for achieving this object
  • a cooling fan speed control device for a construction machine for controlling a cooling fan for cooling various fluids comprising: a temperature sensor for detecting an exhaust gas temperature in front of an exhaust gas aftertreatment device and an exhaust gas temperature detected by the temperature sensor And a fan driving means for driving the cooling fan according to the cooling fan speed information output by the control unit, and outputting different cooling fan speed information according to the determination result. It is characterized by.
  • the control unit outputs first cooling fan rotation speed information having a relatively high cooling fan rotation speed when the exhaust gas temperature is in the overtemperature range, and relatively rotates the cooling fan when the exhaust gas temperature is in the supercooling range. And outputting second cooling fan rotation speed information having a low number.
  • the cooling fan speed control device when the cooling fan speed control device detects the exhaust gas temperature in front of the engine exhaust gas aftertreatment device and the exhaust gas temperature is low, the cooling fan speed can be controlled to reduce the fan driving power. It can help improve fuel economy.
  • the exhaust gas emissions are further purified by reducing the possibility of foreign substances such as soot, which may occur excessively in the exhaust gas aftertreatment device, when the exhaust gas temperature is low. It can help improve the atmosphere.
  • FIG. 1 is a view showing a cooling fan speed control device of a construction machine according to the exhaust gas temperature according to the present invention
  • Figure 2 is a flow chart showing the operation of the cooling fan speed control device of the construction machine according to the exhaust gas temperature according to the present invention in order
  • FIG 3 is a graph showing a mapping relationship between exhaust gas temperature and cooling fan speed according to the present invention.
  • FIG. 1 is a view showing a cooling fan speed control device of a construction machine according to the exhaust gas temperature according to the present invention.
  • the apparatus includes a temperature sensor 101 capable of detecting the exhaust gas temperature in front of the exhaust gas aftertreatment device, and after setting the cooling fan driving speed according to the exhaust gas temperature.
  • the driving speed of the cooling fan is varied according to the current exhaust gas temperature detected by the temperature sensor 101.
  • this apparatus is largely comprised of the temperature sensor 101, the control unit 102, and the fan drive means 103.
  • the temperature sensor 101 for detecting the exhaust gas temperature in front of the exhaust gas aftertreatment device and the exhaust gas temperature detected by the temperature sensor 101 determine whether the exhaust gas temperature is in the overtemperature range or the subcooling range, and thus the cooling is different depending on the determination result.
  • the temperature sensor 101 and the temperature sensor 101 for detecting the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus.
  • Control unit 102 for determining whether the exhaust gas temperature in front of the exhaust gas post-treatment apparatus detected by the controller is an overtemperature range or a subcooling range and outputting different cooling fan rotation speed information accordingly, and a cooling fan output by the controller 102.
  • the fan drive means 103 for driving the cooling fan according to the rotational speed information is made.
  • the temperature sensor 101 is installed between the exhaust gas aftertreatment device and the front end of the exhaust gas aftertreatment device, and detects the exhaust gas temperature at the front end of the exhaust gas aftertreatment device to S1, S2, ..., Si.
  • the exhaust gas temperature value is input to the controller 102.
  • the exhaust gas temperature value thus input is used to determine the rotational speed of the cooling fan. That is, when the input exhaust gas temperature value falls within a predetermined overtemperature range, relatively high cooling fan rotation speed information is determined, and when the input exhaust gas temperature value falls within a predetermined subcooling range, a relatively low cooling fan Allow the speed information to be determined.
  • the control unit 102 determines whether the exhaust gas temperature of the front end of the exhaust gas aftertreatment device detected by the temperature sensor 101 is an overtemperature range or an overcooling range, and outputs different cooling fan rotation speed information according to the determination result. .
  • the first cooling fan rotation speed information is set to be relatively high when the exhaust fan temperature is in the supercooling range, and when the exhaust gas temperature is in the supercooling range, the cooling fan rotation speed is relatively low.
  • the fan driving unit 103 drives the cooling fan according to the cooling fan rotation speed information output from the control unit 102.
  • the exhaust gas temperature is set in a relatively high temperature range so that the cooling fan rotation speed is relatively high.
  • the cooling fan is rotated relatively quickly in accordance with the output first cooling fan rotational speed.
  • the exhaust gas temperature is within the subcooling range and the second cooling fan rotational speed information, in which the cooling fan rotational speed is set to be relatively low, is output from the controller 102, the cooling fan is adjusted according to the output second cooling fan rotational speed. It will rotate relatively slowly.
  • FIG. 2 is a view showing in sequence the operation of the cooling fan speed control device of the construction machine according to the exhaust gas temperature according to the present invention.
  • the present invention includes a temperature sensor capable of detecting an exhaust gas temperature in front of an exhaust gas aftertreatment device, and after setting a cooling fan driving speed according to the exhaust gas temperature, The driving speed of the cooling fan is varied according to the detected current exhaust gas temperature.
  • a predetermined temperature sensor detects the exhaust gas temperature at the front end of the exhaust gas aftertreatment apparatus (S201).
  • the detected exhaust gas temperature is input to the controller.
  • the input exhaust gas temperature is used to determine the rotational speed of the cooling fan.
  • relatively high cooling fan speed information is determined when the input exhaust gas temperature is within a predetermined overtemperature range, and relatively low cooling fan rotation speed when the input exhaust gas temperature is within a predetermined supercooling range. Allow information to be determined.
  • the temperature sensor is installed between the exhaust gas aftertreatment device and the front end of the exhaust gas aftertreatment device, and detects the exhaust gas temperature at the front end of the exhaust gas aftertreatment device and inputs it to the controller.
  • control unit determines whether the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus detected by the temperature sensor is in an overtemperature range or a subcooling range.
  • first cooling fan rotation speed information having a relatively high cooling fan rotation speed is output (S203).
  • second cooling fan rotation speed information having a relatively low cooling fan rotation speed is output (S206).
  • the overtemperature range and the subcooled range are temperature ranges preset in the controller.
  • the fan driving means drives the cooling fan according to the cooling fan rotation speed information output from the control unit.
  • the cooling fan is relatively matched to the output first cooling fan rotational speed. Rotate quickly (S204).
  • the cooling fan is relatively slowed in accordance with the output second cooling fan rotational speed. It is rotated (S207).
  • the present invention by driving the cooling fan according to the cooling fan rotation speed is determined differently depending on whether the exhaust gas temperature in front of the exhaust gas aftertreatment device is an overtemperature range or a subcooling range,
  • the exhaust gas aftertreatment device By using the exhaust gas temperature in front of the exhaust gas aftertreatment device to control the cooling fan speed, the exhaust gas aftertreatment device can be prevented from being overheated or cooled, so that the exhaust gas aftertreatment can always be maintained at an appropriate exhaust gas temperature. Will be.
  • FIG 3 is a view showing a mapping relationship between the exhaust gas temperature and the cooling fan speed in accordance with the present invention.
  • the present invention drives the cooling fan according to the cooling fan rotation speed which is differently determined depending on whether the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus is in the overtemperature range or the subcooling range.
  • the present invention includes a temperature sensor capable of detecting the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus, and sets the current fan gas rotational speed according to the exhaust gas temperature and then detects the current exhaust gas temperature detected by the temperature sensor.
  • the driving speed of the cooling fan is varied.
  • the cooling fan is rotated relatively quickly in accordance with the first cooling fan rotational speed set at a relatively high cooling fan rotational speed.
  • the cooling fan is rotated relatively slowly in accordance with the second cooling fan rotational speed which is set relatively low.
  • the present invention can help to improve the fuel efficiency of the engine because the fan driving power can be reduced by controlling the cooling fan speed low when the exhaust gas temperature is low, and the transient in the exhaust gas after-treatment device when the exhaust gas temperature is low It is useful for improving the air environment by reducing the possibility of foreign substances such as soot, which may occur.

Abstract

The present invention relates to a device for controlling the speed of a cooling fan in a construction machine according to the temperature of exhaust gas and more specifically, to a device for controlling the speed of the cooling fan in a construction machine in order to control the cooling fan which cools various kinds of fluids, comprising: a temperature sensor for detecting the temperature of exhaust gas at the front end of an exhaust gas post-treatment device; a control unit which determines whether the exhaust gas temperature which is detected by the temperature sensor is in a over-heating or over-cooling range, and which outputs cooling fan speed data that are different from each other according to the determined results; and a fan-driving means which drives the cooling fan according to the cooling fan speed data outputted from the control unit. If the temperature of the exhaust gas at the front end of the exhaust gas post-treatment device is detected as being low, the speed of the cooling fan is lowered so as to reduce fan-driving power, thereby assisting the fuel ratio improvement of an engine.

Description

배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치Cooling fan speed control device of construction machine according to exhaust gas temperature
본 발명은 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치에 관한 것으로, 더욱 상세하게는 배기 가스 후처리 장치 전단의 배기가스 온도를 냉각팬 회전수 제어에 사용하여 배기가스 후처리 장치의 과온 혹은 과냉 상태를 예방하여 항상 적절한 배기가스 온도를 유지할 수 있게 함으로써 배기가스 후처리의 효율을 높일 수 있도록 하는, 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치에 관한 것이다.The present invention relates to an apparatus for controlling the cooling fan speed of a construction machine according to the exhaust gas temperature, and more particularly, by using the exhaust gas temperature in front of the exhaust gas aftertreatment device for cooling fan speed control. The present invention relates to an apparatus for controlling the cooling fan speed of a construction machine according to the exhaust gas temperature, by which the exhaust gas post-treatment efficiency can be improved by preventing overheating or undercooling to always maintain an appropriate exhaust gas temperature.
종래의 팬 구동 시스템은 비속도 가변형인 경우, 유체 온도에 상관없이 엔진 속도에 유관하게 냉각팬이 구동된다. 따라서 외기 온도가 낮거나 유체 온도가 낮더라도 엔진 속도가 높은 경우, 팬 회전수가 높아 과냉각의 우려와 동시에 팬 구동 마력이 높아 연비가 낮고 시스템 효율이 떨어지는 단점이 있다.In the conventional fan drive system, when the speed is variable, the cooling fan is driven regardless of the engine speed regardless of the fluid temperature. Therefore, when the engine speed is high even at low ambient temperature or low fluid temperature, the fan speed is high and the fan driving horsepower is high at the same time as the concern of overcooling has a disadvantage of low fuel efficiency and low system efficiency.
또한, 속도 가변형의 팬 구동 시스템 역시 특정 유체의 온도 등을 팬 회전수 제어에 사용하므로, 배기 가스 온도가 낮은 조건에도 팬이 빠르게 회전하여 배기가스 처리 장치 주변의 온도를 떨어뜨리고 동시에 배기 가스 온도가 상승하는 속도를 더디게 하여 배기가스 후처리 장치 내 불순물이 끼거나 재생이 원활하지 않을 수 있다.In addition, the variable speed fan drive system also uses the temperature of the specific fluid to control the fan speed, so that the fan rotates rapidly even at low exhaust gas temperature, thereby reducing the temperature around the exhaust gas treatment device and simultaneously reducing the exhaust gas temperature. Ascending speed may be slowed to cause impurities in the exhaust aftertreatment device or regeneration may not be smooth.
본 발명은 상기한 문제점을 해결하기 위해 개발된 것으로, 배기 가스 후처리 장치 전단의 배기가스 온도를 냉각팬 회전수 제어에 사용하여 배기가스 후처리 장치의 과온 혹은 과냉 상태를 예방하여 항상 적절한 배기가스 온도를 유지할 수 있게 함으로써 배기가스 후처리의 효율을 높일 수 있도록 하는, 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치를 제공하는데 그 목적이 있다.The present invention was developed to solve the above problems, by using the temperature of the exhaust gas in front of the exhaust gas aftertreatment device to control the cooling fan rotation speed to prevent overheating or undercooling of the exhaust gas aftertreatment device, thereby always suitable exhaust gas. It is an object of the present invention to provide an apparatus for controlling the cooling fan speed of a construction machine according to the exhaust gas temperature, by which the temperature can be maintained to increase the efficiency of the exhaust gas aftertreatment.
또 다른 목적은 배기가스 온도가 낮은 경우 냉각팬의 구동 속도를 낮춰줌으로써 냉각팬 구동 마력을 절감하여 장비의 연비 저감에 도움을 줄 수 있도록 하는 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치를 제공하는 데 있다.Another purpose is to control the cooling fan speed of the construction machine according to the exhaust gas temperature to reduce the driving speed of the cooling fan when the exhaust gas temperature is low, thereby reducing the horsepower of the cooling fan to help reduce the fuel efficiency of the equipment. To provide.
이러한 목적을 달성하기 위한 본 발명에 따른 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치는,Cooling fan speed control device of the construction machine according to the exhaust gas temperature according to the present invention for achieving this object,
각종 유체를 냉각시키는 냉각팬을 제어하기 위한 건설기계의 냉각팬 회전수 제어 장치에 있어서, 배기가스 후처리 장치 전단의 배기가스 온도를 검출하는 온도 센서, 상기 온도 센서가 검출한 배기가스 온도가 과온 범위 또는 과냉 범위인지 판단하여 상기 판단 결과에 따라 서로 다른 냉각팬 회전수 정보를 출력하는 제어부 및, 상기 제어부가 출력하는 냉각팬 회전수 정보에 따라 상기 냉각팬을 구동하는 팬 구동수단을 포함하여 이루어지는 것을 특징으로 한다. A cooling fan speed control device for a construction machine for controlling a cooling fan for cooling various fluids, the apparatus comprising: a temperature sensor for detecting an exhaust gas temperature in front of an exhaust gas aftertreatment device and an exhaust gas temperature detected by the temperature sensor And a fan driving means for driving the cooling fan according to the cooling fan speed information output by the control unit, and outputting different cooling fan speed information according to the determination result. It is characterized by.
바람직하게, 상기 제어부는 상기 배기가스 온도가 과온 범위에 속하는 경우 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수 정보를 출력하고, 상기 배기가스 온도가 과냉 범위에 속하는 경우 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수 정보를 출력하는 것을 특징으로 한다.Preferably, the control unit outputs first cooling fan rotation speed information having a relatively high cooling fan rotation speed when the exhaust gas temperature is in the overtemperature range, and relatively rotates the cooling fan when the exhaust gas temperature is in the supercooling range. And outputting second cooling fan rotation speed information having a low number.
본 발명에 따르면 냉각팬 회전수 제어 장치가 엔진 배기가스 후처리 장치 전단의 배기가스 온도를 검출하여 배기 가스 온도가 낮은 경우, 냉각팬 회전수를 낮게 제어하여 팬 구동 동력을 줄일 수 있기 때문에 엔진의 연비 향상에 도움을 줄 수 있다.According to the present invention, when the cooling fan speed control device detects the exhaust gas temperature in front of the engine exhaust gas aftertreatment device and the exhaust gas temperature is low, the cooling fan speed can be controlled to reduce the fan driving power. It can help improve fuel economy.
또한, 배기가스 온도를 냉각팬 회전수 제어에 사용함으로써 배기가스 온도가 낮은 경우 배기가스 후처리 장치 내 과도하게 발생할 수 있는 수트 등의 이물질 발생할 수 있는 가능성을 저감시켜 배기가스 배출물이 좀 더 정화되어 대기 환경 개선에 도움을 줄 수 있다.In addition, by using the exhaust gas temperature to control the cooling fan speed, the exhaust gas emissions are further purified by reducing the possibility of foreign substances such as soot, which may occur excessively in the exhaust gas aftertreatment device, when the exhaust gas temperature is low. It can help improve the atmosphere.
도 1은 본 발명에 따른 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치를 도시한 도면1 is a view showing a cooling fan speed control device of a construction machine according to the exhaust gas temperature according to the present invention
도 2는 본 발명에 따른 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치의 동작을 순서대로 도시한 플로우 챠트Figure 2 is a flow chart showing the operation of the cooling fan speed control device of the construction machine according to the exhaust gas temperature according to the present invention in order
도 3은 본 발명에 따른 배기가스 온도와 냉각팬 회전수 간의 매핑 관계를 도시한 그래프3 is a graph showing a mapping relationship between exhaust gas temperature and cooling fan speed according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
101 : 온도 센서 102 : 제어부101: temperature sensor 102: control unit
103 : 팬 구동수단103: fan drive means
S1, S2, ... , Si : 배기가스 온도S1, S2, ..., Si: exhaust gas temperature
이하, 첨부된 도면을 참조하여 본 발명을 설명한다.Hereinafter, with reference to the accompanying drawings will be described the present invention.
다만, 이하에서 설명되는 실시 예는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 발명을 쉽게 실시할 수 있을 정도로 상세하게 설명하기 위한 것에 불과하며, 이로 인해 본 발명의 보호범위가 한정되는 것을 의미하지는 않는다.However, the embodiments described below are merely to describe in detail enough to be able to easily carry out the invention by those skilled in the art, the scope of protection of the present invention is limited It does not mean.
본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며 명세서 전체를 통하여 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.In order to clearly describe the present invention, parts irrelevant to the description are omitted and like reference numerals denote like parts throughout the specification.
명세서 및 청구범위 전체에서, 어떤 부분이 어떤 구성 요소를 포함한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성 요소를 제외하는 것이 아니라 다른 구성 요소를 포함할 수 있는 것을 의미한다.Throughout the specification and claims, when a part includes a certain component, it means that it may include other components, not to exclude other components unless specifically stated otherwise.
도 1은 본 발명에 따른 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치를 도시한 도면이다.1 is a view showing a cooling fan speed control device of a construction machine according to the exhaust gas temperature according to the present invention.
도 1에 도시된 바와 같이, 본 장치는 배기가스 후처리 장치 전단의 배기 가스 온도를 검출할 수 있는 온도 센서(101)를 구비하고, 배기가스 온도에 따른 냉각팬 구동 회전수를 설정한 이후 상기 온도 센서(101)에서 검출한 현재 배기가스 온도에 따라 냉각팬의 구동 회전수를 가변하는 구조로 된 것이다.As shown in FIG. 1, the apparatus includes a temperature sensor 101 capable of detecting the exhaust gas temperature in front of the exhaust gas aftertreatment device, and after setting the cooling fan driving speed according to the exhaust gas temperature. The driving speed of the cooling fan is varied according to the current exhaust gas temperature detected by the temperature sensor 101.
구체적으로, 본 장치는 크게, 온도 센서(101), 제어부(102), 팬 구동수단(103)을 포함하여 이루어진 구조이다.Specifically, this apparatus is largely comprised of the temperature sensor 101, the control unit 102, and the fan drive means 103.
즉, 배기가스 후처리 장치 전단의 배기가스 온도를 검출하는 온도 센서(101), 상기 온도 센서(101)가 검출한 배기가스 온도가 과온 범위 또는 과냉 범위인지 판단하여 상기 판단 결과에 따라 서로 다른 냉각팬 회전수 정보를 출력하는 제어부(102) 및, 상기 제어부(102)가 출력하는 냉각팬 회전수 정보에 따라 상기 냉각팬을 구동하는 팬 구동수단(103)을 포함하여 이루어진 구조이다.That is, the temperature sensor 101 for detecting the exhaust gas temperature in front of the exhaust gas aftertreatment device and the exhaust gas temperature detected by the temperature sensor 101 determine whether the exhaust gas temperature is in the overtemperature range or the subcooling range, and thus the cooling is different depending on the determination result. And a fan driving means 103 for driving the cooling fan according to the cooling fan rotation speed information output from the control unit 102.
즉, 각종 유체를 냉각시키는 냉각팬을 제어하기 위한 건설기계의 냉각팬 회전수 제어 장치에 있어서, 배기가스 후처리 장치 전단의 배기가스 온도를 검출하는 온도 센서(101), 상기 온도 센서(101)가 검출한 배기가스 후처리 장치 전단의 배기가스 온도가 과온 범위 또는 과냉 범위인지 판단하여 그에 따라 서로 다른 냉각팬 회전수 정보를 출력하는 제어부(102) 및, 상기 제어부(102)가 출력하는 냉각팬 회전수 정보에 따라 상기 냉각팬을 구동하는 팬 구동수단(103)을 포함하여 이루어진 구조이다.That is, in the cooling fan speed control device of a construction machine for controlling the cooling fan for cooling various fluids, the temperature sensor 101 and the temperature sensor 101 for detecting the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus. Control unit 102 for determining whether the exhaust gas temperature in front of the exhaust gas post-treatment apparatus detected by the controller is an overtemperature range or a subcooling range and outputting different cooling fan rotation speed information accordingly, and a cooling fan output by the controller 102. The fan drive means 103 for driving the cooling fan according to the rotational speed information is made.
여기서, 온도센서(101)는 배기가스 후처리 장치와, 배기가스 후처리 장치 전단부 사이에 설치된 것으로, 배기가스 후처리 장치 전단부의 배기가스 온도를 검출하여 S1, S2, ... , Si로 대변되는 배기가스 온도 값을 제어부(102)로 입력하는 것이다. 이렇게 입력된 배기가스 온도 값은 냉각팬의 회전 속도 결정시 사용된다. 즉, 입력된 배기가스 온도 값이 소정의 과온 범위에 속하는 경우엔 상대적으로 높은 냉각팬 회전수 정보가 결정하도록 하고, 입력된 배기가스 온도 값이 소정의 과냉 범위에 속하는 경우엔 상대적으로 낮은 냉각팬 회전수 정보가 결정되도록 한다. Here, the temperature sensor 101 is installed between the exhaust gas aftertreatment device and the front end of the exhaust gas aftertreatment device, and detects the exhaust gas temperature at the front end of the exhaust gas aftertreatment device to S1, S2, ..., Si. The exhaust gas temperature value is input to the controller 102. The exhaust gas temperature value thus input is used to determine the rotational speed of the cooling fan. That is, when the input exhaust gas temperature value falls within a predetermined overtemperature range, relatively high cooling fan rotation speed information is determined, and when the input exhaust gas temperature value falls within a predetermined subcooling range, a relatively low cooling fan Allow the speed information to be determined.
제어부(102)는 상기 온도 센서(101)가 검출한 배기가스 후처리 장치 전단의 배기가스 온도가 과온 범위인지 또는 과냉 범위인지 판단하여 그 판단 결과에 따라 서로 다른 냉각팬 회전수 정보를 출력하는 것이다. 예를 들어, 상기 배기가스 온도가 과온 범위에 속하는 경우 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수 정보를 출력하고, 상기 배기가스 온도가 과냉 범위에 속하는 경우 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수 정보를 출력하며, 상기 과온 범위와 과냉 범위는 제어부(102) 내에 미리 설정된 온도 범위이다.The control unit 102 determines whether the exhaust gas temperature of the front end of the exhaust gas aftertreatment device detected by the temperature sensor 101 is an overtemperature range or an overcooling range, and outputs different cooling fan rotation speed information according to the determination result. . For example, when the exhaust gas temperature is in the overtemperature range, the first cooling fan rotation speed information is set to be relatively high when the exhaust fan temperature is in the supercooling range, and when the exhaust gas temperature is in the supercooling range, the cooling fan rotation speed is relatively low. Outputs the set second cooling fan rotation speed information, wherein the overtemperature range and the subcooled range are a temperature range preset in the controller 102.
팬 구동수단(103)은 상기 제어부(102)가 출력하는 냉각팬 회전수 정보에 따라 냉각팬을 구동하는 것으로, 예를 들어, 상기 배기가스 온도가 과온 범위에 속하여 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수 정보가 제어부(102)로부터 출력된 경우, 출력된 제1 냉각팬 회전수에 맞추어 냉각팬을 상대적으로 빠르게 회전시킨다. 반면, 상기 배기가스 온도가 과냉 범위에 속하여 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수 정보가 제어부(102)로부터 출력된 경우에는, 출력된 제2 냉각팬 회전수에 맞추어 냉각팬을 상대적으로 느리게 회전시키게 된다. The fan driving unit 103 drives the cooling fan according to the cooling fan rotation speed information output from the control unit 102. For example, the exhaust gas temperature is set in a relatively high temperature range so that the cooling fan rotation speed is relatively high. When the first cooling fan rotational speed information is output from the control unit 102, the cooling fan is rotated relatively quickly in accordance with the output first cooling fan rotational speed. On the other hand, when the exhaust gas temperature is within the subcooling range and the second cooling fan rotational speed information, in which the cooling fan rotational speed is set to be relatively low, is output from the controller 102, the cooling fan is adjusted according to the output second cooling fan rotational speed. It will rotate relatively slowly.
이하, 도 1의 본 발명에 따른 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치의 동작을 첨부된 도 2를 참조해 설명한다.Hereinafter, the operation of the cooling fan speed control apparatus for a construction machine according to the exhaust gas temperature according to the present invention of FIG. 1 will be described with reference to FIG. 2.
도 2는 본 발명에 따른 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치의 동작을 순서대로 도시한 도면이다.2 is a view showing in sequence the operation of the cooling fan speed control device of the construction machine according to the exhaust gas temperature according to the present invention.
도 2에 도시된 바와 같이, 본 발명은 배기가스 후처리 장치 전단의 배기 가스 온도를 검출할 수 있는 온도 센서를 구비하고, 배기가스 온도에 따른 냉각팬 구동 회전수를 설정한 이후 상기 온도 센서에서 검출한 현재 배기가스 온도에 따라 냉각팬의 구동 회전수를 가변하는 구조로 된 것이다.As shown in FIG. 2, the present invention includes a temperature sensor capable of detecting an exhaust gas temperature in front of an exhaust gas aftertreatment device, and after setting a cooling fan driving speed according to the exhaust gas temperature, The driving speed of the cooling fan is varied according to the detected current exhaust gas temperature.
구체적인 동작은 다음과 같다.The specific operation is as follows.
먼저, 소정의 온도센서가 배기가스 후처리 장치 전단부의 배기가스 온도를 검출한다(S201).First, a predetermined temperature sensor detects the exhaust gas temperature at the front end of the exhaust gas aftertreatment apparatus (S201).
그런 다음, 검출한 배기가스 온도를 제어부로 입력한다.Then, the detected exhaust gas temperature is input to the controller.
이때, 입력된 배기가스 온도는 냉각팬의 회전 속도 결정시 사용된다. At this time, the input exhaust gas temperature is used to determine the rotational speed of the cooling fan.
즉, 입력된 배기가스 온도가 소정의 과온 범위에 속하는 경우엔 상대적으로 높은 냉각팬 회전수 정보가 결정하도록 하고, 입력된 배기가스 온도가 소정의 과냉 범위에 속하는 경우엔 상대적으로 낮은 냉각팬 회전수 정보가 결정되도록 한다. That is, relatively high cooling fan speed information is determined when the input exhaust gas temperature is within a predetermined overtemperature range, and relatively low cooling fan rotation speed when the input exhaust gas temperature is within a predetermined supercooling range. Allow information to be determined.
상기 온도센서는 배기가스 후처리 장치와, 배기가스 후처리 장치 전단부 사이에 설치된 것으로, 배기가스 후처리 장치 전단부의 배기가스 온도를 검출하여 제어부로 입력하는 것이다. The temperature sensor is installed between the exhaust gas aftertreatment device and the front end of the exhaust gas aftertreatment device, and detects the exhaust gas temperature at the front end of the exhaust gas aftertreatment device and inputs it to the controller.
다음, 제어부는 상기 온도센서가 검출한 배기가스 후처리 장치 전단의 배기가스 온도가 과온 범위인지 또는 과냉 범위인지 판단한다.Next, the control unit determines whether the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus detected by the temperature sensor is in an overtemperature range or a subcooling range.
그런 다음, 상기 판단 결과에 따라 서로 다른 냉각팬 회전수 정보를 출력한다.Then, different cooling fan speed information is output according to the determination result.
예를 들어, 상기 배기가스 온도가 과온 범위에 속하는 경우(S202) 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수 정보를 출력한다(S203).For example, when the exhaust gas temperature is in the overtemperature range (S202), first cooling fan rotation speed information having a relatively high cooling fan rotation speed is output (S203).
그리고, 상기 배기가스 온도가 과냉 범위에 속하는 경우(S205) 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수 정보를 출력한다(S206).When the exhaust gas temperature is in the subcooling range (S205), second cooling fan rotation speed information having a relatively low cooling fan rotation speed is output (S206).
상기 과온 범위와 과냉 범위는 제어부 내에 미리 설정된 온도 범위이다.The overtemperature range and the subcooled range are temperature ranges preset in the controller.
마지막으로, 팬 구동수단은 상기 제어부가 출력하는 냉각팬 회전수 정보에 따라 냉각팬을 구동한다.Finally, the fan driving means drives the cooling fan according to the cooling fan rotation speed information output from the control unit.
예를 들어, 상기 배기가스 온도가 과온 범위에 속하여 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수 정보가 제어부로부터 출력된 경우, 출력된 제1 냉각팬 회전수에 맞추어 냉각팬을 상대적으로 빠르게 회전시킨다(S204). For example, when the first cooling fan rotational speed information, in which the exhaust gas temperature is in the overtemperature range and the cooling fan rotational speed is set to be relatively high, is output from the controller, the cooling fan is relatively matched to the output first cooling fan rotational speed. Rotate quickly (S204).
반면, 상기 배기가스 온도가 과냉 범위에 속하여 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수 정보가 제어부로부터 출력된 경우에는, 출력된 제2 냉각팬 회전수에 맞추어 냉각팬을 상대적으로 느리게 회전시키게 된다(S207). On the other hand, when the exhaust gas temperature is in the subcooling range and the second cooling fan rotational speed information set to have a relatively low cooling fan rotational speed is output from the controller, the cooling fan is relatively slowed in accordance with the output second cooling fan rotational speed. It is rotated (S207).
이와 같이, 본 발명은 배기가스 후처리 장치 전단의 배기가스 온도가 과온 범위 또는 과냉 범위인지에 따라 상이하게 결정되는 냉각팬 회전수에 따라 냉각팬을 구동함으로써, In this way, the present invention by driving the cooling fan according to the cooling fan rotation speed is determined differently depending on whether the exhaust gas temperature in front of the exhaust gas aftertreatment device is an overtemperature range or a subcooling range,
배기 가스 후처리 장치 전단의 배기가스 온도를 냉각팬 회전수 제어에 사용하여 배기가스 후처리 장치의 과온 혹은 과냉 상태를 예방해 항상 적절한 배기가스 온도를 유지할 수 있게 하여 배기가스 후처리의 효율을 높일 수 있게 된다.By using the exhaust gas temperature in front of the exhaust gas aftertreatment device to control the cooling fan speed, the exhaust gas aftertreatment device can be prevented from being overheated or cooled, so that the exhaust gas aftertreatment can always be maintained at an appropriate exhaust gas temperature. Will be.
그리고, 배기가스 온도가 낮은 경우 냉각팬의 구동 속도를 낮춰줌으로써 냉각팬 구동 마력을 절감하여 장비의 연비 저감에도 도움을 줄 수 있게 된다.In addition, when the exhaust gas temperature is low, the driving speed of the cooling fan is lowered, thereby reducing the cooling fan driving horsepower, thereby helping to reduce the fuel efficiency of the equipment.
도 3은 본 발명에 따른 배기가스 온도와 냉각팬 회전수 간의 매핑 관계를 도시한 도면이다.3 is a view showing a mapping relationship between the exhaust gas temperature and the cooling fan speed in accordance with the present invention.
도 3에 도시된 바와 같이, 본 발명은 배기가스 후처리 장치 전단의 배기가스 온도가 과온 범위 또는 과냉 범위인지에 따라 상이하게 결정되는 냉각팬 회전수에 따라 냉각팬을 구동한다.As shown in FIG. 3, the present invention drives the cooling fan according to the cooling fan rotation speed which is differently determined depending on whether the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus is in the overtemperature range or the subcooling range.
즉, 본 발명은 배기가스 후처리 장치 전단의 배기 가스 온도를 검출할 수 있는 온도 센서를 구비하고, 배기가스 온도에 따른 냉각팬 구동 회전수를 설정한 이후 상기 온도 센서에서 검출한 현재 배기가스 온도에 따라 냉각팬의 구동 회전수를 가변하는 구조로 된 것이다.That is, the present invention includes a temperature sensor capable of detecting the exhaust gas temperature in front of the exhaust gas aftertreatment apparatus, and sets the current fan gas rotational speed according to the exhaust gas temperature and then detects the current exhaust gas temperature detected by the temperature sensor. In accordance with this configuration, the driving speed of the cooling fan is varied.
그래서, 예를 들어 배기가스 후처리 장치 전단의 배기가스 온도가 과온 범위(②)에 속하는 경우엔, 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수에 맞추어 냉각팬을 상대적으로 빠르게 회전시킨다. Thus, for example, when the exhaust gas temperature in front of the exhaust gas aftertreatment device falls within the overtemperature range (2), the cooling fan is rotated relatively quickly in accordance with the first cooling fan rotational speed set at a relatively high cooling fan rotational speed. .
반면, 배기가스 후처리 장치 전단의 배기가스 온도가 과냉 범위(①)에 속하는 경우엔, 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수에 맞추어 냉각팬을 상대적으로 느리게 회전시키게 된다. On the other hand, when the exhaust gas temperature in front of the exhaust gas aftertreatment device falls within the subcooling range (1), the cooling fan is rotated relatively slowly in accordance with the second cooling fan rotational speed which is set relatively low.
본 발명은 배기 가스 온도가 낮은 경우, 냉각팬 회전수를 낮게 제어하여 팬 구동 동력을 줄일 수 있기 때문에 엔진의 연비 향상에 도움을 줄 수 있고, 배기가스 온도가 낮은 경우 배기가스 후처리 장치 내 과도하게 발생할 수 있는 수트 등의 이물질 발생할 수 있는 가능성을 저감시켜 대기 환경 개선에 유용하다.The present invention can help to improve the fuel efficiency of the engine because the fan driving power can be reduced by controlling the cooling fan speed low when the exhaust gas temperature is low, and the transient in the exhaust gas after-treatment device when the exhaust gas temperature is low It is useful for improving the air environment by reducing the possibility of foreign substances such as soot, which may occur.

Claims (2)

  1. 각종 유체를 냉각시키는 냉각팬을 제어하기 위한 건설기계의 냉각팬 회전수 제어 장치에 있어서,In the cooling fan speed control device of a construction machine for controlling a cooling fan for cooling various fluids,
    배기가스 후처리 장치 전단의 배기가스 온도를 검출하는 온도 센서;A temperature sensor detecting an exhaust gas temperature in front of the exhaust gas aftertreatment device;
    상기 온도 센서가 검출한 배기가스 온도가 과온 범위 또는 과냉 범위인지 판단하여 상기 판단 결과에 따라 서로 다른 냉각팬 회전수 정보를 출력하는 제어부; 및A controller configured to determine whether the exhaust gas temperature detected by the temperature sensor is in an overtemperature range or an overcooling range and output different cooling fan rotation speed information according to the determination result; And
    상기 제어부가 출력하는 냉각팬 회전수 정보에 따라 상기 냉각팬을 구동하는 팬 구동수단을 포함하여 이루어진 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치.Cooling fan speed control apparatus for a construction machine according to the exhaust gas temperature comprising a fan drive means for driving the cooling fan according to the cooling fan speed information output by the control unit.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 제어부는The control unit
    상기 배기가스 온도가 과온 범위에 속하는 경우 상대적으로 냉각팬 회전수가 높게 설정된 제1 냉각팬 회전수 정보를 출력하고, 상기 배기가스 온도가 과냉 범위에 속하는 경우 상대적으로 냉각팬 회전수가 낮게 설정된 제2 냉각팬 회전수 정보를 출력하는 것을 특징으로 하는 배기가스 온도에 따른 건설기계의 냉각팬 회전수 제어 장치.Outputs first cooling fan rotation speed information with a relatively high cooling fan speed when the exhaust gas temperature is within an overtemperature range, and outputs second cooling fan rotation speed with a relatively low cooling fan speed when the exhaust gas temperature is within a supercooling range. Cooling fan speed control device for a construction machine according to the exhaust gas temperature, characterized in that output fan speed information.
PCT/KR2012/005932 2012-07-25 2012-07-25 Device for controlling speed of cooling fan in construction machine according to temperature of exhaust gas WO2014017677A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006037863A (en) * 2004-07-28 2006-02-09 Hitachi Constr Mach Co Ltd Cooling device of construction machine
KR20080068786A (en) * 2005-11-02 2008-07-24 히다치 겡키 가부시키 가이샤 Cooling fan drive device for traveling working machine
KR20090033957A (en) * 2007-10-02 2009-04-07 두산인프라코어 주식회사 Cooling fan control device of a construction heavy equipment
KR20100074393A (en) * 2008-12-24 2010-07-02 두산인프라코어 주식회사 Engine room cooling system using an electric fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006037863A (en) * 2004-07-28 2006-02-09 Hitachi Constr Mach Co Ltd Cooling device of construction machine
KR20080068786A (en) * 2005-11-02 2008-07-24 히다치 겡키 가부시키 가이샤 Cooling fan drive device for traveling working machine
KR20090033957A (en) * 2007-10-02 2009-04-07 두산인프라코어 주식회사 Cooling fan control device of a construction heavy equipment
KR20100074393A (en) * 2008-12-24 2010-07-02 두산인프라코어 주식회사 Engine room cooling system using an electric fan

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