KR100405436B1 - Cooling efficiency improving apparatus of diesel engine and method thereof - Google Patents

Cooling efficiency improving apparatus of diesel engine and method thereof Download PDF

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Publication number
KR100405436B1
KR100405436B1 KR10-2000-0082445A KR20000082445A KR100405436B1 KR 100405436 B1 KR100405436 B1 KR 100405436B1 KR 20000082445 A KR20000082445 A KR 20000082445A KR 100405436 B1 KR100405436 B1 KR 100405436B1
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combustion chamber
engine
temperature
pressure
diesel engine
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KR10-2000-0082445A
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Korean (ko)
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KR20020053137A (en
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김창일
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현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

본 발명은 디젤엔진에 관한 것이다.The present invention relates to a diesel engine.

이같은 본 발명은, 겨울철 엔진이 냉각될 때 연소실로의 연료 분사를 차단함은 물론 냉각 공기의 흡입을 차단한 후 엔진피스톤을 압축 및 팽창시켜 연소실내의 공기 압력을 충분히 상승시킨 상태에서 연소실로의 연료 및 공기의 유입이 이루어지도록 하므로서, 디젤엔진의 냉시동을 방지하면서 냉시동에 따른 배기가스의 배출로 부터 발생하는 백연현상을 예방하고, 더불어 디젤엔진의 연소가 보다 원활하게 이루어질수 있도록 하는 등 디젤차량의 시동을 향상시키는 디젤엔진의 냉각 성능 개선장치 및 그 개선방법을 제공한다.In the present invention, when the engine is cooled in winter, the fuel injection to the combustion chamber is blocked, as well as the intake of cooling air is blocked, and the piston is compressed and expanded to sufficiently increase the air pressure in the combustion chamber to the combustion chamber. By allowing fuel and air to flow in, it prevents the cold start of the diesel engine and prevents the white smoke caused by the exhaust gas emission caused by the cold start, and also makes the diesel engine combustion more smoothly. Provided are an apparatus for improving cooling performance of a diesel engine for improving starting of a vehicle, and a method of improving the same.

Description

디젤엔진의 냉각 성능 개선장치 및 그 개선방법{Cooling efficiency improving apparatus of diesel engine and method thereof}Cooling efficiency improving apparatus of diesel engine and method

본 발명은 디젤엔진에 관한 것으로서, 특히 겨울철 엔진이 냉각될 때 연소실로의 연료 분사를 차단함은 물론 냉각 공기의 흡입을 차단한 후 엔진피스톤을 압축 및 팽창시켜 연소실내의 공기 압력을 충분히 상승시킨 상태에서 연소실로의 연료 및 공기의 유입이 이루어지도록 하여 디젤엔진의 냉시동 및 연소가 보다 원활하게 이루어질수 있도록 하는 디젤엔진의 냉각 성능 개선장치 및 그 개선방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diesel engine. In particular, when the engine is cooled in winter, the fuel injection to the combustion chamber is blocked, as well as the intake of cooling air is compressed and the engine piston is compressed and expanded to sufficiently increase the air pressure in the combustion chamber. The present invention relates to an apparatus for improving cooling performance of a diesel engine and a method for improving the cooling performance of a diesel engine so as to allow fuel and air to be introduced into a combustion chamber in a state so that cold start and combustion of the diesel engine can be performed more smoothly.

일반적으로, 디젤엔진의 큰 단점은 겨울철 기온이 영하 10도 이하로 내려갔을 때 엔진시동이 잘 안걸리고, 막상 시동이 걸렸을 경우에도 배기가스 중에 백연(white smoke)가 심하게 발생되는 등 많은 불편함이 따랐다.In general, a major disadvantage of diesel engines is that the engine does not start well when the temperature drops below 10 degrees Celsius in winter, and white smoke is generated in the exhaust gas even when the engine starts. Followed.

즉, 디젤엔진은 연소실내로 유입된 공기와 연료가 서로 혼합된 상태에서 피스톤이 압축행정을 하면서 자연 발하되어 폭발이 이루어지는 것인데, 냉각시에는 유입된 공기 및 연료가 모두 냉각되어 있고 연소실 자체도 냉각되어 있어 시동이 어려운 불편함이 따랐던 것이다.In other words, the diesel engine is spontaneously released while the piston is compressed and compressed while the air and fuel introduced into the combustion chamber are mixed with each other.In the case of cooling, both the air and fuel introduced are cooled and the combustion chamber itself is cooled. It was difficult to start because of the inconvenience.

또한, 막상 시동이 되었다 하더라도 냉각된 연소실내의 공기 및 연료는 충분히 연소가 안되어 있는 상태이므로, 이로인하여 발생되는 미연소가스가 대기중에 방출되면서 백연을 발생시키는 폐단이 따랐다.In addition, even if the start-up of the membrane, air and fuel in the cooled combustion chamber are not sufficiently burned, and thus, unburned gas generated in the air is released into the atmosphere, resulting in the generation of white smoke.

이에, 종래에는 상기와 같은 문제점들을 해소할수 있도록, 냉각시 연료분사 시기를 조정하거나, 연소실의 설계변경을 통해 그 압축비를 높이거나, 시동전 연소실을 가열해주는 별도의 히터를 장착하는 등의 방법이 고안되어 사용되고 있다.Thus, in the related art, in order to solve the above problems, a method such as adjusting the fuel injection timing during cooling, increasing the compression ratio by changing the design of the combustion chamber, or installing a separate heater that heats the combustion chamber before starting It is designed and used.

그러나, 상기와 같은 방법들을 적용하기 위해서는 디젤엔진의 설계적 제한과 함께 엔진개발에 상당한 투자를 하여야 하는 어려움이 따랐다.However, in order to apply the above methods, it is difficult to make a significant investment in engine development along with the design limitation of the diesel engine.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 안출된 것으로서 본 발명의 목적은, 겨울철 엔진이 냉각될 때 연소실로의 연료 분사를 차단함은 물론 냉각 공기의 흡입을 차단한 후 엔진피스톤을 압축 및 팽창시켜 연소실내의 공기 압력을 충분히 상승시킨 상태에서 연소실로의 연료 및 공기의 유입이 이루어지도록 하므로서, 디젤엔진의 냉시동을 방지하면서 냉시동에 따른 배기가스의 배출로 부터 발생하는 백연현상을 예방하고, 더불어 디젤엔진의 연소가 보다 원활하게 이루어질수 있도록 하는 등 디젤차량의 시동을 향상시키는 디젤엔진의 냉각 성능 개선장치 및 그 개선방법을 제공하려는 것이다.Therefore, the present invention has been made to solve the conventional problems as described above, the object of the present invention, the engine piston after blocking the intake of cooling air as well as blocking the fuel injection to the combustion chamber when the engine is cooled in winter. Compresses and expands the fuel in the combustion chamber while the air pressure in the combustion chamber is sufficiently raised to allow the fuel and air to flow into the combustion chamber, thereby preventing the cold start of the diesel engine, while the white smoke generated from the exhaust gas discharged from the cold start. It is to provide a cooling performance improving device and a method of improving the diesel engine to improve the starting of the diesel vehicle, such as to prevent the phenomenon and to facilitate the combustion of the diesel engine more smoothly.

도 1은 본 발명의 일실시예로 디젤엔진의 냉각 성능 개선장치의 구조를 보인 개략도.1 is a schematic view showing the structure of an apparatus for improving cooling performance of a diesel engine according to one embodiment of the present invention;

도 2는 본 발명의 일실시예로 디젤엔진의 냉각 성능 개선방법을 보인 플로우챠트.Figure 2 is a flow chart showing a method for improving the cooling performance of a diesel engine in one embodiment of the present invention.

*도면의주요부분에대한부호의설명** Explanation of symbols on the main parts of the drawings *

1 ; 엔진피스톤 2 ; 연소실One ; Engine piston 2; combustion chamber

3 ; 흡기관 4 ; 흡기밸브3; Intake pipe 4; Intake valve

10; 온도/압력센서부 20; 엔진제어유닛10; Temperature / pressure sensor unit 20; Engine control unit

30; 솔레노이드밸브 40; 액추에이터30; Solenoid valve 40; Actuator

50; 흡기관제어피스톤50; Intake pipe control piston

이하, 첨부된 도면에 의거하여 본 발명의 바람직한 일실시예를 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 일실시예로 디젤엔진의 냉각 성능 개선장치의 구조를 보인 개략도 이다.1 is a schematic view showing the structure of an apparatus for improving cooling performance of a diesel engine according to an embodiment of the present invention.

도 1에 도시된 바와같이, 연소실(2)의 내부 온도 및 압력을 감지하는 온도/압력센서부(10)와;As shown in Figure 1, the temperature / pressure sensor unit 10 for detecting the internal temperature and pressure of the combustion chamber (2);

차량의 시동키이(start ket) 온시, 상기 온도/압력센서부(10)로 부터 감지된 신호에 따라 엔진피스톤(1)이 스스로 압축과 팽창행정을 하여 연소실(2)내의 온도 및 압력이 일정수준으로 도달할때까지 연소실(2)로의 연료 분사및 공기흡입 동작을 제어하는 엔진제어유닛(20)과;When the start ket of the vehicle is on, the engine piston 1 compresses and expands itself according to a signal detected from the temperature / pressure sensor unit 10 so that the temperature and pressure in the combustion chamber 2 are constant. An engine control unit 20 which controls fuel injection and air intake to the combustion chamber 2 until it reaches

상기 엔진제어유닛(20)의 제어에 따라 온/오프의 작동이 이루어지는 솔레노이드밸브(30)와;A solenoid valve 30 in which on / off operation is performed under the control of the engine control unit 20;

상기 솔레노이드밸브(30)의 온/오프 작동에 따라 직선왕복의 구동을 하는 액추에이터(40)와;An actuator 40 for driving linear reciprocation according to the on / off operation of the solenoid valve 30;

상기 액추에이터(40)와 연동되면서 차량의 냉시동이 발생되지 않도록 연소실(2)과 연결되는 흡기관(3)의 입구를 밀폐시켜 연소실(2)로의 연료분사는 물론 공기흡입을 차단시키는 흡기관 제어피스톤(50); 로 구성함을 특징으로 한다.Intake pipe control interlocked with the actuator 40 to seal the inlet of the intake pipe 3 connected to the combustion chamber 2 so that cold starting of the vehicle does not occur, thereby blocking fuel injection as well as air intake to the combustion chamber 2. Piston 50; It is characterized by the configuration.

이하, 미설명된 도면부호 4는 흡기밸브 이다.Hereinafter, reference numeral 4 that is not described is an intake valve.

그리고, 도 2는 상기 설명된 본 발명의 일실시예인 디젤엔진의 냉각 성능 개선장치에 의해 구현되는 냉각성능 개선방법을 보인 플로우챠트로서 그 진행단계는,And, Figure 2 is a flow chart showing a cooling performance improving method implemented by the cooling performance improving apparatus of the diesel engine as an embodiment of the present invention described above, the progress step,

연소실(2)내의 공기압력과 온도를 감지한 후 그 감지된 압력과 온도를 기준 온도 및 압력과 비교하여 냉시동 조건인가를 판단하는 단계와;Sensing the air pressure and temperature in the combustion chamber 2 and comparing the detected pressure and temperature with a reference temperature and pressure to determine whether a cold start condition is present;

상기 판단결과 기준온도 및 압력보다 높아 냉시동 조건이 아니면 연소실(2)로 연료를 분사함은 물론 공기를 흡입시켜 엔진의 연소가 이루어지도록 하는 단계와;When the determination result is higher than the reference temperature and the pressure, the fuel is injected into the combustion chamber (2) as well as the air is sucked into the combustion chamber (2) to allow combustion of the engine;

상기 판단결과 기준온도 및 압력보다 낮으면 액추에이터(40)를 구동시켜 연소실(2)과 연결된 흡기관(3)의 입구를 밀폐시키는 단계와;Closing the inlet of the intake pipe 3 connected to the combustion chamber 2 by driving the actuator 40 when the determination result is lower than the reference temperature and pressure;

상기 단계로 부터 연료분사와 공기 흡입을 차단시 엔진피스톤(1)의 자체적인 압축과 팽창행정이 진행되도록 한 후 엔진의 회전수를 체크하는 단계와;Checking the number of revolutions of the engine after the compression and expansion stroke of the engine piston (1) proceeds when the fuel injection and air intake are blocked from the above steps;

상기 체크결과 엔진의 회전수(20회 이상)가 높으면 연소실(2)의 온도 및 압력이 일정수준으로 도달하지 않더라도 엔진을 정지시키고, 엔진의 회전수(20회 이하)가 낮으면 연소실(2)의 온도 및 압력이 일정수준으로 도달할때까지 상기 단계를 반복 수행하는 단계; 로 진행함을 특징으로 한다.As a result of the check, if the engine speed (20 or more times) is high, the engine is stopped even if the temperature and pressure of the combustion chamber (2) do not reach a predetermined level. If the engine speed (20 or less) is low, the combustion chamber (2) Repeating the above steps until the temperature and pressure of the resin reaches a predetermined level; Characterized in proceeding to.

이와같이 구성된 본 발명의 일실시예에 대한 작용을 첨부된 도 1 및 도 2를 참조하여 설명하면 다음과 같다.Referring to Figures 1 and 2 attached to the operation of an embodiment of the present invention configured as described above are as follows.

먼저, 연소실(2)과 연결된 흡기관(3)의 입구측에 설치된 온도/압력센서부(10)에서 연소실(2)의 내부 온도 및 압력을 감지한 후 그 감지정보를 엔진제어유닛(20)으로 출력한다.First, the internal temperature and pressure of the combustion chamber 2 are sensed by the temperature / pressure sensor unit 10 installed at the inlet side of the intake pipe 3 connected to the combustion chamber 2, and the detection information is transmitted to the engine control unit 20. Will print

이때, 상기 엔진제어유닛(20)에서는 차량의 시동키이 온시 온도/압력센서부(10)로 부터 감지된 신호에 따라 엔진피스톤(1)이 스스로 압축과 팽창행정을 하여 연소실(2)내의 온도 및 압력이 일정수준으로 도달할때까지 연소실(2)로의 연료 분사는 공기흡입을 제어한다.At this time, in the engine control unit 20, when the start key of the vehicle is turned on, the engine piston 1 compresses and expands itself according to a signal detected from the temperature / pressure sensor unit 10, and thus the temperature in the combustion chamber 2 is reduced. Fuel injection into the combustion chamber 2 controls the air intake until the pressure reaches a certain level.

즉, 상기 엔진제어유닛(20)은 온도/압력센서부(10)로 부터 감지된 연소실(2)의 압력과 온도를 기준 온도 및 압력과 비교한 후 냉시동 조건인가를 판단하게 되는 바,That is, the engine control unit 20 compares the pressure and temperature of the combustion chamber 2 sensed by the temperature / pressure sensor unit 10 with a reference temperature and pressure, and then determines whether it is a cold start condition.

상기 판단결과 냉시동 조건이 아니면, 상기 엔진제어유닛(20)에서는 솔레노이드밸브(30)를 온 동작시키게 되고, 상기 솔레노이드밸브(30)의 온 동작에 따라 액추에이터(40) 및 흡기관제어피스톤(50)의 후진이 발생하면서 흡기관(3)의 입구측을 개방시켜 연소실(2)로 연료를 분사함은 물론 공기를 흡입시켜 엔진의 연소가 이루어지도록 한다.If the determination result is not a cold start condition, the engine control unit 20 turns on the solenoid valve 30, and according to the on operation of the solenoid valve 30, the actuator 40 and the intake pipe control piston 50 As the reverse occurs, the inlet side of the intake pipe 3 is opened to inject fuel into the combustion chamber 2 as well as to suck the air so that combustion of the engine is achieved.

한편, 상기 판단결과 냉시동 조건이면, 상기 엔진제어유닛(20)에서는 액추에이터(40)를 전진 구동시켜 연소실(2)과 연결된 흡기관(3)의 입구를 밀폐시키게 된다.On the other hand, if it is determined that the cold start condition, the engine control unit 20 drives the actuator 40 forward to seal the inlet of the intake pipe 3 connected to the combustion chamber 2.

즉, 상기 액추에이터(40)와 일체화된 흡기관제어피스톤(50)은 액추에이터(40)의 전진구동으로 부터 연동한 후 흡기관(3)의 입구를 밀폐시키게 되는 바,That is, the intake pipe control piston 50 integrated with the actuator 40 is interlocked from the forward drive of the actuator 40 to seal the inlet of the intake pipe 3,

상기 흡기관(3)의 밀폐로 부터 연소실(2)의 내부로는 연료의 분사가 이루어지지 않음은 물론, 공기의 흡입이 차단되면서 엔진의 연소가 이루어지지 않게 되는 것이다.Fuel is not injected into the combustion chamber 2 from the seal of the intake pipe 3, and the combustion of the engine is not performed while the intake of air is blocked.

이때, 상기 연료분사와 공기 흡입이 차단될 때, 엔진피스톤(1)의 자체적인 압축과 팽창행정이 진행되면서 엔진의 회전수가 증가하게 되는데,At this time, when the fuel injection and the air intake is cut off, the rotational speed of the engine increases as the compression and expansion stroke of the engine piston 1 proceeds.

상기 엔진제어유닛(20)에서는 엔진의 회전수가 20회 이상일 경우 연소실(2)의 온도 및 압력이 일정수준으로 도달하지 않더라도 엔진을 정지시켜 엔진 과열을 방지하고, 엔진의 회전수가 20회 이하일 경우에는 연소실(2)의 온도 및 압력이 일정수준으로 도달할때까지 계속적으로 연소실(2)로의 연료분사는 물론 공기의 흡입을 차단하여 차량의 냉시동 조건을 방지하게 되는 것이다.In the engine control unit 20, when the engine speed is 20 or more times, even if the temperature and pressure of the combustion chamber 2 do not reach a predetermined level, the engine is stopped to prevent overheating of the engine, and when the engine speed is 20 or less, Until the temperature and pressure of the combustion chamber 2 reaches a certain level, fuel injection into the combustion chamber 2 is blocked as well as the intake of air to prevent cold start conditions of the vehicle.

이상에서 설명한 바와같이 본 발명은 겨울철 엔진이 냉각될 때 연소실로의 연료 분사를 차단함은 물론 냉각 공기의 흡입을 차단한 후 엔진피스톤을 압축 및 팽창시켜 연소실내의 공기 압력을 충분히 상승시킨 상태에서 연소실로의 연료 및공기의 유입이 이루어지도록 하므로서, 디젤엔진의 냉시동을 방지하면서 냉시동에 따른 배기가스의 배출로 부터 발생하는 백연현상을 예방하고, 더불어 디젤엔진의 연소가 보다 원활하게 이루어질수 있도록 하는 등 디젤차량의 시동을 향상시키는 효과가 있다.As described above, the present invention not only blocks fuel injection into the combustion chamber when the engine is cooled in winter, but also blocks the intake of cooling air and compresses and expands the engine piston in a state in which the air pressure in the combustion chamber is sufficiently raised. By allowing fuel and air to flow into the combustion chamber, it prevents the cold start of the diesel engine and prevents the white smoke caused by the exhaust gas emission caused by the cold start. It is effective to improve the starting of diesel vehicles.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와같은 변경은 청구범위 기재의 범위내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

연소실의 내부 온도 및 압력을 감지하는 온도/압력센서부와;A temperature / pressure sensor unit for sensing the internal temperature and pressure of the combustion chamber; 차량의 시동키이 온시, 상기 온도/압력센서부로 부터 감지된 신호에 따라 엔진피스톤이 스스로 압축과 팽창행정을 하여 연소실내의 온도 및 압력이 일정수준으로 도달할때까지 연소실로의 연료 분사 및 공기흡입 동작을 제어하는 엔진제어유닛과;When the vehicle's ignition key is turned on, the engine piston compresses and expands itself according to the signal detected from the temperature / pressure sensor unit, and fuel injection and air intake into the combustion chamber until the temperature and pressure in the combustion chamber reach a certain level. An engine control unit for controlling the operation; 상기 엔진제어유닛의 제어에 따라 온/오프의 작동이 이루어지는 솔레노이드밸브와;A solenoid valve in which on / off operation is performed under the control of the engine control unit; 상기 솔레노이드밸브의 온/오프 작동에 따라 직선왕복의 구동을 하는 액추에이터와;An actuator for driving the linear reciprocating according to the on / off operation of the solenoid valve; 상기 액추에이터와 연동되면서 차량의 냉시동이 발생되지 않도록 연소실과 연결되는 흡기관의 입구를 밀폐시켜 연소실로의 연료분사는 물론 공기흡입을 차단시키는 흡기관 제어피스톤; 으로 구성함을 특징으로 하는 디젤엔진의 냉각 성능 개선장치.An intake pipe control piston which interlocks with the actuator and closes an inlet of the intake pipe connected to the combustion chamber so that cold starting of the vehicle is not generated and blocks fuel injection as well as air intake into the combustion chamber; Improved cooling performance of the diesel engine, characterized in that consisting of. 연소실내의 공기압력과 온도를 감지한 후 그 감지된 압력과 온도를 기준 온도 및 압력과 비교하여 냉시동 조건인가를 판단하는 단계와;Sensing the air pressure and temperature in the combustion chamber and comparing the detected pressure and temperature with a reference temperature and pressure to determine whether a cold start condition is present; 상기 판단결과 기준온도 및 압력보다 높아 냉시동 조건이 아니면 연소실로 연료를 분사함은 물론 공기를 흡입시켜 엔진의 연소가 이루어지도록 하는 단계와;Determining that the engine is combusted by injecting fuel into the combustion chamber as well as inhaling air if the cold temperature is higher than the reference temperature and pressure as a result of the determination; 상기 판단결과 기준온도 및 압력보다 낮으면 액추에이터를 구동시켜 연소실과 연결된 흡기관의 입구를 밀폐시키는 단계와;Closing the inlet of the intake pipe connected to the combustion chamber by driving the actuator when the determination result is lower than the reference temperature and pressure; 상기 단계로 부터 연료분사와 공기 흡입을 차단시 엔진피스톤의 자체적인 압축과 팽창행정이 진행되도록 한 후 엔진의 회전수를 체크하는 단계와;Checking the rotational speed of the engine after the compression and expansion stroke of the engine piston proceeds when the fuel injection and air intake are blocked from the above step; 상기 체크결과 엔진의 회전수가 높으면 연소실의 온도 및 압력이 일정수준으로 도달하지 않더라도 엔진을 정지시키고, 엔진의 회전수가 낮으면 연소실의 온도 및 압력이 일정수준으로 도달할때까지 상기 단계를 반복 수행하는 단계; 로 진행함을 특징으로 하는 디젤엔진의 냉각 성능 개선방법.If the engine speed is high, the engine is stopped even if the temperature and pressure of the combustion chamber do not reach a certain level. If the engine speed is low, the above steps are repeated until the temperature and pressure of the combustion chamber reach a certain level. step; Method for improving the cooling performance of the diesel engine, characterized in that proceed to.
KR10-2000-0082445A 2000-12-27 2000-12-27 Cooling efficiency improving apparatus of diesel engine and method thereof KR100405436B1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5879634A (en) * 1981-11-05 1983-05-13 Nissan Motor Co Ltd Starter device of diesel engine
JPS60164646A (en) * 1984-02-06 1985-08-27 Toyota Motor Corp Device for controlling start of diesel-engine
JPS60261925A (en) * 1984-06-10 1985-12-25 Mazda Motor Corp Intake-air device in diesel engine
JPS627926A (en) * 1985-07-02 1987-01-14 Mazda Motor Corp Intake device for diesel engine
KR19980044460A (en) * 1996-12-06 1998-09-05 박병재 Intake system for diesel engine
KR100337355B1 (en) * 1999-12-28 2002-05-22 이계안 Cooling start control method for diesel vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5879634A (en) * 1981-11-05 1983-05-13 Nissan Motor Co Ltd Starter device of diesel engine
JPS60164646A (en) * 1984-02-06 1985-08-27 Toyota Motor Corp Device for controlling start of diesel-engine
JPS60261925A (en) * 1984-06-10 1985-12-25 Mazda Motor Corp Intake-air device in diesel engine
JPS627926A (en) * 1985-07-02 1987-01-14 Mazda Motor Corp Intake device for diesel engine
KR19980044460A (en) * 1996-12-06 1998-09-05 박병재 Intake system for diesel engine
KR100337355B1 (en) * 1999-12-28 2002-05-22 이계안 Cooling start control method for diesel vehicle

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