KR20020019148A - Engine oil supplying apparatus - Google Patents

Engine oil supplying apparatus Download PDF

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Publication number
KR20020019148A
KR20020019148A KR1020000052270A KR20000052270A KR20020019148A KR 20020019148 A KR20020019148 A KR 20020019148A KR 1020000052270 A KR1020000052270 A KR 1020000052270A KR 20000052270 A KR20000052270 A KR 20000052270A KR 20020019148 A KR20020019148 A KR 20020019148A
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KR
South Korea
Prior art keywords
oil
engine
pump
engine oil
solenoid valve
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KR1020000052270A
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Korean (ko)
Inventor
허곤
Original Assignee
이계안
현대자동차주식회사
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Priority to KR1020000052270A priority Critical patent/KR20020019148A/en
Publication of KR20020019148A publication Critical patent/KR20020019148A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

PURPOSE: An engine oil supplying device is provided to prevent endurance of component from dropping by lubricating oil in starting engine through actively pumping the engine oil. CONSTITUTION: A device for supplying an engine oil comprises an oil pan(1) mounted to a min gallery(3) by being lifted through an oil pump(21); an engine oil(4) transferred to the main gallery; plural passages(5); a strainer(6) filtrating the engine oil; a lower pressure portion(8) formed on a pump suction port(7); a high pressure portion(10) mounted on a pump discharging port(9); an oil reservoir tank(11) connected tot eh main gallery; an oil supplying passage(12) interlocking the oil reservoir tank with the lower pressure end of the oil pump; and a solenoid valve turned on/off according to control of an ECU(Electronic Control Unit). Thereby, the device for supplying the engine oil prevents drop of endurance of component by actively pumping the engine oil.

Description

엔진 오일 공급장치{Engine oil supplying apparatus}Engine oil supplying apparatus

본 발명은 차량의 장기 주차 후 시동시 엔진 각부에 원활히 엔진 오일을 공급하여 윤활하는 엔진 오일 공급 장치에 관한 것이다.The present invention relates to an engine oil supply device for smoothly supplying and lubricating engine oil to engine parts when starting after long-term parking of a vehicle.

엔진이 회전중에는 많은 부품들이 서로 마찰을 일으키고 또 이들 중에는 상당한 하중이 걸리면서 고속으로 마찰하는 경우도 있다.While the engine is rotating, many parts rub against each other, and some of them rub at high speeds with significant loads.

이와같은 마찰 부분에 사용되는 힘은 실린더의 팽창 행정에서 얻은 힘에 대하여 저항이며, 손실이 되는 힘으로서 동력 손실을 초래하고, 부품끼리의 마찰로 그 부품을 마모시켜 수명을 단축시키고 엔진의 성능을 총합적으로 단축시키는 원인이 된다.The force used in this frictional part is a resistance to the force obtained in the expansion stroke of the cylinder, which causes loss of power as a lossy force, and wears out the parts by friction between parts, which shortens the service life and improves engine performance. It causes shortening overall.

이때문에 엔진 부품들의 마모 및 동력손실을 방지하기 위하여 윤활하므로써 엔진 내부의 마찰 저항을 저감하고 동시에 엔진 내부의 냉각에 대해서도 중요한 의미를 가진다.For this reason, lubrication is prevented to prevent wear and power loss of engine parts, thereby reducing frictional resistance of the engine and at the same time, it is important to cool the engine.

엔진에는 이 윤활을 위한 엔진오일이 주입되어 있으며, 이 엔진오일은 도 4에 도시하는 것과 같이 오일팬(21)에 수용하여 오일펌프(22)에 의해 퍼올려 메인갤러리(23)를 통해 엔진 각부에 분배 공급되어지게 된다.The engine oil is injected into the engine for this lubrication, and the engine oil is accommodated in the oil pan 21 and pumped up by the oil pump 22 as shown in FIG. 4 through the main gallery 23. To be dispensed.

이 오일펌프(22)는 오일팬(21)으로부터 스트레이너(24)를 경유하여 펌프하우징내로 도입되는 펌프흡입구(25)측에 저압단(26)이 형성되고, 한쌍의 맞물린기어 회전에 의해 압축력을 받아 오일이 송출되는 펌프토출구(27)측에는 고압단(28)이 형성되어 있어 오일펌프(22)에 유입된 저압의 오일이 고압단(28)에 이르러 3~5㎏/㎠의 고압이 되어 메인갤러리(23)로 송출되어지게 된다.The oil pump 22 has a low pressure stage 26 formed on the pump suction port 25 side introduced into the pump housing through the strainer 24 from the oil pan 21, and compresses the compressive force by rotating a pair of meshed gears. The high pressure stage 28 is formed at the pump discharge port 27 side through which the oil is discharged. The low pressure oil flowing into the oil pump 22 reaches the high pressure stage 28 and becomes a high pressure of 3 to 5 kg / cm 2. It is sent to the gallery 23.

그런데 종래의 엔진 오일 공급장치에 의하면 차량이 장시간 주차시에는 오일펌프(22)내의 오일이 자중에 의해 스트레이너(24)를 통해 오일팬(21)으로 드레인 되기 때문에 오일펌프(22)는 드라이(dry)상태가 된다.However, according to the conventional engine oil supply device, when the vehicle is parked for a long time, the oil in the oil pump 22 is drained to the oil pan 21 through the strainer 24 by its own weight, so that the oil pump 22 is dry. ) State.

이에따라 엔진을 재시동하면 오일펌프(22)의 저압단(26)측의 오일부족으로 진공 능력이 저하되어 펌핑시 스펀지 현상이 일어나 오일팬(21)으로부터 오일 흡입이 원활치 못하게 되므로써 엔진 각부에 공급되는 오일의 도달시간이 그만큼 길어져 순간적인 윤활 부족 현상을 초래하게 되며, 이와 같은 현상이 엔진 시동시마다 반복되는 경우 엔진의 각 윤활부의 점진적인 수명 저하를 가져오게 되는 원인이 되고 있다.Accordingly, when the engine is restarted, the vacuum capacity decreases due to the lack of oil on the low pressure stage 26 side of the oil pump 22, and a sponge phenomenon occurs during pumping, so that oil intake from the oil pan 21 cannot be smoothly supplied. The time of arrival of the fuel cell is increased so that instantaneous lubrication shortage occurs. If this phenomenon is repeated every time the engine is started, it causes a gradual deterioration of life of each lubrication part of the engine.

이에 본 발명은 상기한 문제점을 감안하여 제안한 것으로서 그의 목적으로 하는 것은 엔진의 장시간 주차로 오일펌프내의 오일이 드레인 되었을 때 엔진 시동시 이를 즉시 보충해 주므로써 엔진 오일의 신속한 펌핑 공급을 가능토록 하여 엔진 각부의 손상을 방지하고 내구성을 증대시키게 되는 엔진 오일 공급 장치를 제공하는데 있다.Therefore, the present invention has been proposed in view of the above problems, and its object is to provide a quick pumping supply of engine oil by immediately replenishing it when the engine is drained when the oil in the oil pump is drained due to long parking of the engine. An object of the present invention is to provide an engine oil supply device which prevents damage to each part and increases durability.

상기한 목적을 달성하기 위하여 본 발명은 엔진 오일을 저장하는 오일팬; 스트레이너를 통해 오일팬내의 엔진오일을 퍼올려 급송하며, 펌프흡입구측에 저압단이 형성되고 펌프토출구측에 고압단이 형성되는 오일펌프와;The present invention is an oil pan for storing the engine oil to achieve the above object; An oil pump which pumps and feeds the engine oil in the oil pan through a strainer, and a low pressure stage is formed at the pump inlet and a high pressure stage is formed at the pump outlet;

그 오일펌프로부터 고압으로 토출되는 엔진오일을 엔진 각부에 분배 공급하는 메인갤러리;를 포함하여 구성되는 엔진오일공급장치에 있어서,An engine oil supply device comprising: a main gallery for distributing and supplying engine oil discharged at high pressure from the oil pump to each engine part,

상기 메인갤러리로 유입되는 엔진오일의 일부를 공급받아 저장하는 오일리저버탱크가 상기 메인갤러리의 접속 설치되어 있으며, 상기 오일리저버탱크는 오일펌프보다 높은 위치 에너지를 가지도록 설치되고, 상기 오일 리저버탱크와 상기 오일펌프의 저압단은 오일공급 유로로 연결되며, 상기 오일공급유로의 도중에는 엔진의 시동시 상기 오일리저버탱크내의 엔진오일이 상기 저압단측으로 공급되도록 개방 작동하는 솔레노이드밸브가 설치되어 있는 것을 특징으로 한다.An oil reservoir tank for receiving and storing a portion of the engine oil flowing into the main gallery is connected to the main gallery, and the oil reservoir tank is installed to have a higher potential energy than the oil pump, and the oil reservoir tank is The low pressure stage of the oil pump is connected to an oil supply flow path, and the solenoid valve is opened so that the engine oil in the oil reservoir tank is supplied to the low pressure end side when the engine is started. do.

그리고 본 발명의 청구항 2 기재에 의하면 상기 솔레노이드밸브는 전자제어장치의 작동제어에 의해 오일공급유로를 온.오프 하도록 제어되며, 상기 전자제어장치는 시동키의 오프에서는 솔레노이드밸브를 닫고, 시동키의 2단 위치에서는 솔레노이드밸브를 개방하며, 또 시동키가 스타트 위치에 돌려져 엔진이 시동되면 솔레노이드밸브를 닫도록 제어하는 것을 특징으로 한다.According to the second aspect of the present invention, the solenoid valve is controlled to turn on and off the oil supply flow path by the operation control of the electronic controller. The electronic controller closes the solenoid valve when the ignition key is turned off, and The solenoid valve is opened in the second stage, and the starter key is turned to the start position to control the solenoid valve to close when the engine is started.

도 1은 본 발명에 의한 엔진 오일 공급장치를 나타내는 도면1 is a view showing an engine oil supply device according to the present invention

도 2는 본 발명의 제어 블록도2 is a control block diagram of the present invention;

도 3은 시동키스위치를 나타내는 도면3 is a view showing a start key switch

도 4는 종래의 엔진 오일 공급장치4 is a conventional engine oil supply device

※도면의 주요 부분에 대한 부호의 설명※ Explanation of code for main part of drawing

1 : 오일팬 2 : 오일펌프1: Oil Pan 2: Oil Pump

3 : 메인갤러리 4 : 엔진오일3: main gallery 4: engine oil

5 : 유로 6 : 스트레이너5: Euro 6: Strainer

7 : 펌프흡입구 8 : 저압단7: pump suction port 8: low pressure stage

9 : 펌프토출구 10 : 고압단9: pump outlet 10: high pressure stage

11 : 오일리저버탱크 12 : 오일공급유로11: oil reservoir tank 12: oil supply passage

13 : 전자제어장치 14 : 솔레노이드밸브13 electronic control device 14 solenoid valve

15 : 시동키스위치15: start key switch

이하 본 발명의 구성과 작용을 첨부한 도면을 참조하여 설명한다.Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명에 의한 엔진 오일 공급장치를 나타내는 도면으로 도면중 부호 1은 엔진 하부, 즉 실린더블록 하부에 장착되어 엔진 각부에 공급하는 엔진오일을 저장하는 오일팬이다.1 is a view showing an engine oil supply apparatus according to the present invention, the reference numeral 1 in the drawing is an oil pan for storing the engine oil to be mounted to the lower part of the engine, that is, the cylinder block and supplied to the engine parts.

이 오일팬(1)은 오일펌프(21)에 의해 올려져서 메인갤러리(3)로 보내지며, 메인갤러리(3)에 보내진 엔진오일(4)은 각각의 유로(5)들을 통하여 엔진 각부, 예를 들면 캠축과 베어링, 크랭크축, 밸브기구 등에 공급된다.The oil pan 1 is lifted by the oil pump 21 and sent to the main gallery 3, and the engine oil 4 sent to the main gallery 3 passes through the respective flow paths 5, for example, the engine parts. For example, it is supplied to camshafts, bearings, crankshafts and valve mechanisms.

오일펌프(2)에 의해 퍼올려지는 오일(4)은 스트레이너(6)를 통해 여과된 후 펌프흡입구(7)측에 형성되는 저압단(8)으로 유입되며, 도시하지 아니한 기어 회전에 의해 펌프토출구(9)측에 형성된 고압단(10)에 배출되므로서 고압단(10)에 계속 유입되는 오일은 3~5㎏㎠의 고압이 되어 메인갤러리(3)로 토출된다.The oil 4 pumped by the oil pump 2 is filtered through the strainer 6 and then flows into the low pressure stage 8 formed at the pump suction port 7 side, and the pump is rotated by a gear not shown. The oil continuously flowing into the high pressure stage 10 while being discharged to the high pressure stage 10 formed at the discharge port 9 side is discharged to the main gallery 3 at a high pressure of 3 to 5 kg 2.

이 메인갤러리(3)에는 오일리저버탱크(11)가 연결 접속되어 있어, 메인갤러리(3)로 유입된 엔진오일(4)의 일부가 오일리저버탱크(11)를 항시 채우게 되어 있다.The oil reservoir tank 11 is connected and connected to the main gallery 3 so that a part of the engine oil 4 introduced into the main gallery 3 always fills the oil reservoir tank 11.

그리고 오일리저버탱크(11)는 오일펌프(2) 보다, 구체적으로는 저압단(8) 보다는 높은 위치 에너지를 가지도록 설치되며, 오일리저버탱크(11)와 오일펌프(2)의 저압단(8)은 오일공급유로(12)에 의해 서로 연통하도록 연결되고 있다.The oil reservoir tank 11 is installed to have a higher potential energy than the oil pump 2, specifically, the low pressure stage 8, and the low pressure stage 8 of the oil reservoir tank 11 and the oil pump 2. ) Are connected to communicate with each other by the oil supply passage (12).

또 오일공급유로(12)의 도중에는 전자제어장치(13)의 제어에 따라 온.오프 작동되는 솔레노이드밸브(14)가 그 유로(12)를 개폐할 수 있게 설치되어 있다.In the middle of the oil supply passage 12, a solenoid valve 14, which is operated on and off under the control of the electronic control apparatus 13, is installed to open and close the flow passage 12.

이와같은 본 발명의 엔진오일 공급장치에 의한 작용을 설명하면 다음과 같다.Referring to the operation by the engine oil supply device of the present invention as follows.

엔진이 시동되어 오일펌프(2)가 가동되어 메인갤러리(3)에 고압의 엔진오일이 유입되면, 그 엔진오일은 유로(5)들을 통하여 엔진의 각 운동 부위에 공급되고 또 일부는 오일리저버탱크(11)를 채우게 된다.When the engine is started and the oil pump 2 is operated and the high pressure engine oil flows into the main gallery 3, the engine oil is supplied to each moving part of the engine through the flow paths 5, and a part of the oil reservoir tank is provided. Fill in (11).

그런데 엔진이 시동 오프되고 차량이 장시간 주차하게 되면, 오일펌프(2)의 저압단(8) 및 고압단(10)에 충진되어 있던 엔진오일이 자중에 의해 오일스트레이너(6)를 경유하여 오일팬(1)으로 드레인되므로써 오일펌프(2)의 하우징내에는 엔진오일이 부족한 드라이 상태가 된다.However, when the engine is started and the vehicle is parked for a long time, the engine oil filled in the low pressure stage 8 and the high pressure stage 10 of the oil pump 2 passes through the oil strainer 6 due to its own weight. By draining to (1), the oil of the oil pump 2 is in a dry state in which engine oil is insufficient.

그런데 엔진이 시동 오프되어 있는 상태에서 솔레노이드밸브(14)는 오프 상태이므로 오일공급유로(12)는 차단되어 있게 되며, 차량 운행을 위하여 시동키(15)가 도 3에 도시하는 것과 같이 2단 위치로 돌려지게 되면 전자제어장치(13)는 이를 감지하여 솔레노이드밸브(14)가 온 작동하도록 제어 신호를 출력한다.However, since the solenoid valve 14 is turned off while the engine is turned off, the oil supply passage 12 is shut off, and the starter key 15 is positioned in a two-stage position as shown in FIG. When turned to the electronic control device 13 detects this and outputs a control signal for the solenoid valve 14 to operate on.

이에따라 솔레노이드밸브(14)가 오일공급유로(12)를 개방하게 되면, 오일리저버탱크(11)내에 저장되어 있던 엔진오일은 위치에너지차에 의해 오일펌프(2)의 저압단(8)에 공급되어 저압단(8)을 엔진 오일로 채우게 된다.Accordingly, when the solenoid valve 14 opens the oil supply passage 12, the engine oil stored in the oil reservoir tank 11 is supplied to the low pressure stage 8 of the oil pump 2 by the potential energy difference. The low pressure stage 8 is filled with engine oil.

이윽고, 시동키(15)가 스타트 위치로 돌려져 엔진이 시동되면, 전자제어장치(13)는 솔레노이드밸브(14)를 오프시켜 오일공급유로(12)를 차단하게 된다.Then, when the start key 15 is turned to the start position and the engine is started, the electronic control device 13 turns off the solenoid valve 14 to block the oil supply passage 12.

이와같이 하여 오일펌프(2)의 저압단(8)에 오일이 공급되어 채워지면 오일펌프(2) 구동과 동시에 오일팬(1)내의 오일을 즉시 흡입하여 송출하게 되므로 유로(5)를 통해 엔진 각부에 신속하게 엔진오일이 공급되어지게되며, 저압단(8)측에 일부 오일을 공급한 오일리저버탱크(8)에는 다시 오일이 유입되어 가득 채워지게 되는 것이다.In this way, when oil is supplied to the low pressure stage 8 of the oil pump 2 and filled, the oil pump 2 is driven and the oil in the oil pan 1 is immediately sucked out and discharged. The engine oil is quickly supplied to the oil reservoir, and the oil reservoir tank 8, which supplies some oil to the low pressure stage 8, is filled with oil again.

이상과 같은 본 발명에 의하면 오일펌프로부터 송출되는 엔진오일을 엔진 각부에 분배 공급하는 오일갤러리에 오일리저버탱크를 접속하여 유입되는 오일이 항상 오일리저버탱크를 채워 저장되도록 한 후 그 오일리저버탱크와 오일펌프의 저압단측을 오일공급유로로 연결하며, 그 오일공급유로의 도중에는 솔레노이드밸브를 설치하고 그 솔레노이드밸브가 엔진 시동키의 2단 위치에서 개방작동되도록 하는것에 의해서 엔진 시동시 오일펌프내를 엔진 오일이 충만한 웨트(wet)상태로 유지토록 하여 원활한 펌핑이 가능토록 하므로써 엔진 각부의 시동초기 윤활 부족을 방지하여 엔진의 소착과 부품의 내구성 저하를 방지하게 되는 효과가 있다.According to the present invention as described above by connecting the oil reservoir tank to the oil gallery for distributing and supplying the engine oil discharged from the oil pump to the engine parts to ensure that the incoming oil is always filled with the oil reservoir tank to store the oil reservoir tank and the oil The low pressure end of the pump is connected to the oil supply passage, and a solenoid valve is installed in the middle of the oil supply passage, and the solenoid valve is opened in the second stage of the engine start key to operate the engine oil in the engine. By maintaining the full wet state, the pump can be smoothly pumped, thereby preventing the lack of initial lubrication at the start of each part of the engine, thereby preventing the seizure of the engine and the deterioration of durability of the parts.

Claims (2)

엔진 오일을 저장하는 오일팬; 스트레이너를 통해 오일팬내의 엔진오일을 퍼올려 급송하며, 펌프흡입구측에 저압단이 형성되고 펌프토출구측에 고압단이 형성되는 오일펌프와;An oil pan for storing engine oil; An oil pump which pumps and feeds the engine oil in the oil pan through a strainer, and a low pressure stage is formed at the pump inlet and a high pressure stage is formed at the pump outlet; 그 오일펌프로부터 고압으로 토출되는 엔진오일을 엔진 각부에 분배 공급하는 메인갤러리;를 포함하여 구성되는 엔진오일공급장치에 있어서,An engine oil supply device comprising: a main gallery for distributing and supplying engine oil discharged at high pressure from the oil pump to each engine part, 상기 메인갤러리로 유입되는 엔진오일의 일부를 공급받아 저장하는 오일리저버탱크가 상기 메인갤러리의 접속 설치되어 있으며, 상기 오일리저버탱크는 오일펌프보다 높은 위치 에너지를 가지도록 설치되고, 상기 오일 리저버탱크와 상기 오일펌프의 저압단은 오일공급 유로로 연결되며, 상기 오일공급유로의 도중에는 엔진의 시동시 상기 오일리저버탱크내의 엔진오일이 상기 저압단측으로 공급되도록 개방 작동하는 솔레노이드밸브가 설치되어 있는 것을 특징으로 하는 엔진 윤활장치.An oil reservoir tank for receiving and storing a portion of the engine oil flowing into the main gallery is connected to the main gallery, and the oil reservoir tank is installed to have a higher potential energy than the oil pump, and the oil reservoir tank is The low pressure stage of the oil pump is connected to an oil supply flow path, and the solenoid valve is opened so that the engine oil in the oil reservoir tank is supplied to the low pressure end side when the engine is started. Engine lubricator. 제 1 항에 있어서,The method of claim 1, 상기 솔레노이드밸브는 전자제어장치의 작동제어에 의해 오일공급유로를 온.오프 제어되며, 상기 전자제어장치는 시동키의 오프에서는 솔레노이드밸브를 닫고, 시동키의 2단 위치에서는 솔레노이드밸브르 개방하며, 또 시동키가 스타트 위치에 돌려져 엔진이 시동되면 솔레노이드밸브를 닫도록 제어하는 것을 특징으로 하는 엔진 윤활장치.The solenoid valve is controlled on and off the oil supply flow path by the operation control of the electronic control device, the electronic control device closes the solenoid valve when the ignition key off, open the solenoid valve in the second position of the ignition key, And the starter key is turned to the start position to control the solenoid valve to close when the engine is started.
KR1020000052270A 2000-09-05 2000-09-05 Engine oil supplying apparatus KR20020019148A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150071753A (en) * 2013-12-18 2015-06-29 대우조선해양 주식회사 Dry running preventing apparatus and method of lubrication pump for engine lubrication oil system
KR20200044186A (en) * 2018-10-08 2020-04-29 인하대학교 산학협력단 Auto feeding device of lubricant for FDM type 3D Printing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150071753A (en) * 2013-12-18 2015-06-29 대우조선해양 주식회사 Dry running preventing apparatus and method of lubrication pump for engine lubrication oil system
KR20200044186A (en) * 2018-10-08 2020-04-29 인하대학교 산학협력단 Auto feeding device of lubricant for FDM type 3D Printing

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