KR100218891B1 - A variable pumping capacity type oil pump - Google Patents

A variable pumping capacity type oil pump Download PDF

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Publication number
KR100218891B1
KR100218891B1 KR1019960072167A KR19960072167A KR100218891B1 KR 100218891 B1 KR100218891 B1 KR 100218891B1 KR 1019960072167 A KR1019960072167 A KR 1019960072167A KR 19960072167 A KR19960072167 A KR 19960072167A KR 100218891 B1 KR100218891 B1 KR 100218891B1
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KR
South Korea
Prior art keywords
high speed
crankshaft
low speed
pump
low
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KR1019960072167A
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Korean (ko)
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KR19980053117A (en
Inventor
최수길
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정몽규
현대자동차주식회사
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Priority to KR1019960072167A priority Critical patent/KR100218891B1/en
Publication of KR19980053117A publication Critical patent/KR19980053117A/en
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Publication of KR100218891B1 publication Critical patent/KR100218891B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C2/063—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them
    • F04C2/07—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents with coaxially-mounted members having continuously-changing circumferential spacing between them having crankshaft-and-connecting-rod type drive

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

Abstract

본 발명의 목적은 엔진의 운전조건에 맞추어 각 운동부가 필요로 하는 오일의 요구량을 공급하므로써 불필요한 동력손실 및 오일열화를 방지할 수 있는 펌핑용량 가변형 오일펌프를 제공하는데 있다.It is an object of the present invention to provide an oil pump with a variable pumping capacity capable of preventing unnecessary power loss and oil deterioration by supplying a required amount of oil required by each moving part in accordance with an engine operating condition.

상기한 목적을 달성하기 위하여 엔진의 저속운전시 크랭크축에 접속하여 오일을 토출하는 저속용 펌프기어와; 엔진의 고속운전시 크랭크축에 접속하여 오일을 토출하는 고속용 펌프기어와; 및 상기 저속 및 고속용 펌프기어를 수용하는 펌프카바와 프런트케이스로; 구성되며, 회전관성력이 작은 저속회전시에는 상기 저속용 펌프기어를 크랭크축에 키이 결합시키는 대신 고속용 펌프기어는 키이 결합 해제시키며 반대로 회전관성력이 큰 고속운전시에는 고속용 펌프기어를 크랭크축에 키이 결합시키고 저속용 펌프기어의 키이 결합 상태를 해제시키는 동력접속 변경기구가 크랭크축에 구비되어 있는 것을 특징으로 한다.A low speed pump gear connected to the crankshaft to discharge oil during low speed operation of the engine to achieve the above object; A high speed pump gear connected to the crankshaft to discharge oil during high speed operation of the engine; And a pump cover and a front case accommodating the low speed and high speed pump gears. In the low speed rotation with low rotational inertia, the high speed pump gear is released from the key instead of the key coupled to the crankshaft. On the contrary, the high speed pump gear is connected to the crankshaft at high speed with high rotational inertia. It is characterized in that the crankshaft is provided with a power connection change mechanism for engaging the key and releasing the key engagement state of the low speed pump gear.

Description

펌핑용량 가변형 오일펌프Pumping capacity variable oil pump

본 발명은 펌핑용량 가변형 오일펌프에 관한 것이다.The present invention relates to a pumping capacity variable oil pump.

엔진은 고속으로 운전하므로 각 운동부, 예를 들면 크랭크축, 캠축, 밸브트레인, 피스톤 및 베어링 부위 등의 마모 방지를 위한 윤활 및 과열되는 것을 방지하고자 냉각시키기 위하여 오일을 공급하고 있다.Since the engine runs at high speed, oil is supplied to cool the engine to prevent overheating and lubrication to prevent wear of each moving part, for example, the crankshaft, the camshaft, the valve train, the piston, and the bearing part.

오일을 공급하는 방법으로는 통상 오일펌프 구동에 의한 강제 급송 방식을 사용하고 있으며 오일펌프(30)는 모터에 의해서도 구동토록 할 수 있으나 통상적으로는 도 4에 도시하는 것과 같이 크랭크축(31)의 회전력을 이용하여 구동된다.As a method of supplying oil, a forced feeding method by driving an oil pump is generally used, and the oil pump 30 may be driven by a motor, but as shown in FIG. 4, the crankshaft 31 is normally It is driven by the rotational force.

도시한 실시예는 기어펌프를 간략히 도시한 것으로서 펌프기어(32)가 크랭크축과 함께 회전하게 되므로써 맞물려 회전하는 한쌍의 기어가 잇빨 홈에 오일을 간직한 채 카바(33)와 프런트케이스(34)에 형성된 흡입구측에서 토출구측으로 오일을 강제로 밀어내므로 이때의 압력에 의해 윤활 회로를 순환하면서 각 운동부에 공급되는 것이다.The illustrated embodiment is a simplified illustration of a gear pump, in which a pair of gears engaged by rotating the pump gear 32 together with the crankshaft retain the oil in the tooth grooves to the cover 33 and the front case 34. Since the oil is forcibly pushed from the formed suction port side to the discharge port side, it is supplied to each moving part while circulating the lubrication circuit by the pressure at this time.

오일펌프는 크랭크축에 직결되어 있어 엔진의 회전수가 높아지면 펌핑 압력도 비례하여 높아지게 되는데 제3도에 도시하는 그래프에서 알 수 있듯이 일정 rpm이상의 운전구간에서는 윤활 및 냉각에 필요로 하는 오일량(B)이 거의 일정한 반면에 오일펌프(30)로부터 토출되는 유량은 계속하여 증가(C)하므로 오일의 과잉공급이 발생하게 되며 고속운전시의 불필요한 오일의 과일 공급은 엔진의 구동력 손실을 가져오며, 또한 높은 속도와 압력에 의하여 순환되는 오일의 열화가 촉진되는 문제점이 지적되고 있다.The oil pump is directly connected to the crankshaft. As the engine rotation speed increases, the pumping pressure also increases proportionally. As can be seen from the graph shown in FIG. 3, the oil amount required for lubrication and cooling in the operating section over a certain rpm (B ) Is almost constant, while the flow rate discharged from the oil pump 30 continues to increase (C), resulting in an excessive supply of oil. Fruit supply of unnecessary oil in high speed operation results in a loss of driving force of the engine. It is pointed out that the deterioration of the oil circulated by the high speed and pressure is promoted.

이에 본 발명은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 바는 엔진의 운전조건에 맞추어 각 운동부가 필요로 하는 오일의 요구량을 공급하므로써 불필요한 동력손실 및 오일열화를 방지할 수 있는 펌핑용량 가변형 오일펌프를 제공하는데 있다.Accordingly, the present invention has been proposed in view of the above problems, and its purpose is to provide a pumping capacity capable of preventing unnecessary power loss and oil deterioration by supplying the required amount of oil required by each moving part according to the engine operating conditions. To provide a variable oil pump.

상기한 목적을 달성하기 위하여 본 발명은 엔진의 저속운전시 크랭크축에 접속하여 오일을 토출하는 저속용 펌프기어와; 엔진의 고속운전시 크랭크축에 접속하여 오일을 토출하는 고속용 펌프기어와; 및 상기 저속 및 고속용 펌프기어를 수용하는 펌프카바와 프런트케이스로 구성되며, 회전관성력이 작은 저속외전시에는 상기 저속용 펌프기어를 크랭크축에 키이 결합시키는 대신 고속용 펌프기어는 키이 결합 해제시키며 반대로 회전관성력이 큰 고속운전시에는 고속용 펌프기어를 크랭크축에 키이 결합시키고 저속용 펌프기어의 키이 결합 상태를 해제시키는 동력접속 변경기구가 크랭크축에 구비되어 있는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a low-speed pump gear for discharging oil by connecting to the crankshaft during low-speed operation of the engine; A high speed pump gear connected to the crankshaft to discharge oil during high speed operation of the engine; And a pump cover and a front case accommodating the low speed and high speed pump gears, and in the case of low speed external rotation with low rotational inertia, the high speed pump gears are decoupled from the high speed pump gears instead of the keys are coupled to the crank shaft. In the high speed operation with high rotational inertia, the crankshaft is provided with a power connection change mechanism for coupling the high speed pump gear to the crankshaft and releasing the key engagement state of the low speed pump gear.

제1도는 본 발명에 의한 펌핑용량 가변형 오일펌프를 나타내는 도면.1 is a view showing a pumping capacity variable oil pump according to the present invention.

제2도는 본 발명의 동력접속 변경기구를 나타내는 도면.2 is a view showing a power connection change mechanism of the present invention.

제3도는 펌핑 오일량과 rpm과의 관계를 나타내는 도면.3 is a diagram showing the relationship between the amount of pumped oil and rpm.

제4도는 종래 오일펌프.4 is a conventional oil pump.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 오일펌프 3 : 프런트케이스1: Oil pump 3: Front case

4 : 크랭크축 5 : 저속용 펌프기어4: crankshaft 5: low speed pump gear

6 : 고속용 펌프기어 7 : 동력접속 변경기구6: High speed pump gear 7: Power connection change mechanism

8, 9 : 키이홈 10 : 통로8, 9: keyway 10: passage

12 : 시이소오 회동간 11, 13, 14 : 힌지12: Siisoo meeting, 11, 13, 14: hinge

15, 16 : 레버 17 : 관성체15, 16: lever 17: inertial body

18 : 스프링 19, 20 : 키이18: spring 19, 20: tall

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.

제1도는 본 발명에 의한 펌핑용량 가변형 오일펌프를 나타내는 도면이며, 제2도 는 본 발명의 동력접속 변경기구를 나타내는 상세 단면도이며, 제3도는 본 발명의 오일펌프의 오일토출량과 필요요구량 관계를 나타내는 그래프이다.1 is a view showing a variable pumping capacity oil pump according to the present invention, Figure 2 is a detailed cross-sectional view showing a power connection change mechanism of the present invention, Figure 3 is a relationship between the oil discharge amount and the required amount of the oil pump of the present invention It is a graph.

도면중 부호 1로 나타내는 오일펌프는 펌프카바(2)와 프런트케이스(3)로 형성된 공간내에 크랭크축(4)에 의해 회전 작동되는 저속용 펌프기어(5)와 고속용 펌프기어(6)를 수용하여 구성되어 있다.The oil pump indicated by reference numeral 1 in the figure includes a low speed pump gear 5 and a high speed pump gear 6 which are rotationally operated by a crank shaft 4 in a space formed by the pump cover 2 and the front case 3. It is configured to accommodate.

그리고 상기 각 펌프기어(5)(6)는 각기 동일한 크기의 기어와 한쌍을 이루어 맞물려 회전하도록 프런트케이스(3) 내에 수용되며 크랭크축(4)에는 상기 저속용 및 고속용 펌프기어(5)(6)를 각기 선택적으로 크랭크축(4)에 결합시키기 위한 동력 접속 변경기구(7)가 마련되어 있다.Each of the pump gears 5 and 6 is accommodated in the front case 3 so as to be engaged with each other by a pair of gears of the same size, and the crank shaft 4 has the low speed and high speed pump gears 5 ( A power connection change mechanism 7 for selectively coupling 6) to the crankshaft 4 is provided.

상기 동력접속 변경기구(7)는 저·고속용 펌프기어(5)(6)에 형성된 키이홈(8)(9)에 연통하도록 크랭크축(4)에 형성된 ㄷ자 형상의 통로(10)에 수용되며 힌지축(11)을 중심으로 시이소오 회동하는 시이소오 회동간(12)과 시이오소 회동간(12)의 양단에 각기 힌지(13)(14)로 접속되어 ㄷ자 통로(10)의 수직부의 안내를 따라 상하 작동하는 저속용 레버(15)와 고속용 레버(16), 그리고 상기 고속용 레버(16)의 도중에 마련되어 관성력에 의해 바깥측 또는 내측으로 이동하는 성질을 가진 관성체(17), 원심력이 감소시에 상기 관성체(17)를 내측으로 끌어당기는 스프링(18) 및 상기 저·고속용 레버(15)(16) 끝단에 장착된 저·고속용 키이(19)(20)로 구성된다.The power connection change mechanism 7 is accommodated in a c-shaped passage 10 formed in the crankshaft 4 so as to communicate with the key grooves 8 and 9 formed in the low and high speed pump gears 5 and 6. And hinges 13 and 14, respectively, connected to both ends of the shio-so pivot 12 and the shio-so pivot 12, which are pivoted about the hinge shaft 11, respectively. A low-speed lever 15 and a high-speed lever 16 that operate up and down along a guide, and an inertial body 17 having a property of moving in an outward or inward direction by an inertial force, It consists of a spring 18 which pulls the inertial body 17 inward when the centrifugal force decreases and the low and high speed keys 19 and 20 mounted at the ends of the low and high speed levers 15 and 16. do.

여기서 상기 저속용 펌프기어(5)의 폭은 고속용 펌프기어(6)의 폭보다 크게 만들어 지게 되는 바 이는 크랭크축(4)의 동일 회전수를 기준하였을 때 폭이 큰 저속용 펌프기어(5)측의 오일토출량이 고속용 펌프기어(6) 보다 많은 것을 뜻한다.Here, the width of the low-speed pump gear 5 is made larger than the width of the high-speed pump gear 6, which is a large low-speed pump gear 5 when the same rotation speed of the crankshaft (4) It means that the oil discharge amount on the side is higher than the high speed pump gear (6).

다시 부연하여 설명하면 고속용 펌프기어(6)는 높은 회전수하에서 구동되므로 낮은 회전수하에서 구동되는 저속용 펌프기어(5)와 토출 용량에 있어서 큰 차이가 없도록 하므로써 고속용 펌프기어(6)는 상대적으로 경량화가 가능하게 된 것이다.In other words, since the high speed pump gear 6 is driven at a high rotational speed, the high speed pump gear 6 is operated so that there is no big difference in discharge capacity from the low speed pump gear 5 which is driven at a low rotational speed. Relatively lightweight can be achieved.

이상과 같은 본 발명은 엔지의 회전수가 낮은 저속 운전구간에서는 관성체(17)에 작용하는 원심력보다 스프링(18)의 장력이 크므로 고속용 레버(16)는 하강되어 고속용 키이홈(9)으로부터 빠지게 되는 반면 시이소오 회동간(12)의 타측에 마련된 저속용 레버(15)는 상승하게 되므로써 저속용 키이(19)가 키이홈(8)에 삽입되어 저속용 펌프기어(5)가 크랭크축(4)에 연결되어 펌핑 작동하게 되며 접속이 해제된 고속용 펌프기어(6)는 정지하여 있게 되는 것이다.In the present invention as described above, since the tension of the spring 18 is greater than the centrifugal force acting on the inertial body 17 in the low speed driving section where the engine speed is low, the high speed lever 16 is lowered so that the high speed key groove 9 is provided. The low-speed lever 15 provided on the other side of the iso-slewing shaft 12 is raised so that the low-speed key 19 is inserted into the key groove 8 so that the low-speed pump gear 5 is crankshaft. (4) is connected to the pumping operation and the high speed pump gear (6) disconnected is to be stopped.

이 상태에서 엔진이 고속 회전하게 되면 관성체(17)에 작용하는 원심력, 즉 회전관성력이 커져 관성체(17)는 스프링(18)의 장력을 극복하고 바깥으로 이동하여 고속용 레버(16)는 상승하고 저속용 레버(15)는 하강하게 된다.In this state, when the engine rotates at high speed, the centrifugal force acting on the inertial body 17, that is, the rotational inertia force increases, so that the inertial body 17 overcomes the tension of the spring 18 and moves outwards. Ascend and the low speed lever 15 is lowered.

이에 따라 저속용 키이(19)는 키이홈(8)으로부터 하강하여 이탈되고 고속용 키이(20)는 키이홈(9)에 결합되어 저속용 펌프(5)의 회전은 정지되고 고속용 펌프기어(6)는 회전하여 펌핑 작용을 하게 된다.Accordingly, the low speed key 19 is lowered and released from the key groove 8 and the high speed key 20 is coupled to the key groove 9 so that the rotation of the low speed pump 5 is stopped and the high speed pump gear ( 6) rotates to perform the pumping action.

도 3에 저속용 펌프기어와 고속용 펌프기어의 선택적 구동에 의한 오일토출량 곡선(A)과 운동부위에서의 필요요구량 곡선(B)과 종래 오일펌프의 오일토출량 곡선(C)을 각기 비교하여 나타낸 것에서 알 수 있듯이 본 발명은 필요요구량에 근접하여 오일의 공급이 이루어지는 특성을 갖는다.Fig. 3 shows a comparison of the oil discharge amount curve (A) by the selective driving of the low speed pump gear and the high speed pump gear, the required demand curve (B) at the movement site, and the oil discharge curve (C) of the conventional oil pump, respectively. As can be seen, the present invention has the property that the oil is supplied close to the required amount.

여기서 미설명 부호 21은 저속용 펌프기어(5)와 고속용 펌프기어(6)측을 차단하는 격벽이다.Here, reference numeral 21 denotes a partition wall that blocks the low speed pump gear 5 and the high speed pump gear 6 side.

이상과 같은 본 발명은 엔진의 저속운전시와 고속운전시 각기 선택적으로 크랭크축에 결합되어 펌핑 작동되는 저속용 펌프기어와 고속용 펌프기어를 구비하는 것에 의해서 엔진이 필요로하는 오일유량에 근접해서 적정량을 공급하게 되므로써 불필요한 오일펌프 손실을 줄여 엔진출력을 향상시키고 오일의 과잉 공급에 따른 열화를 방지하게 되는 효과가 있다.As described above, the present invention includes a low speed pump gear and a high speed pump gear which are selectively coupled to the crankshaft at the low speed operation and the high speed operation of the engine to pump the pump, and thus close to the oil flow required by the engine. By supplying the proper amount, it is possible to reduce unnecessary oil pump loss to improve engine output and prevent deterioration due to excessive supply of oil.

Claims (3)

엔진의 저속운전시 크랭크축에 접속하여 오일을 토출하는 저속용 펌프기어와; 엔진의 고속운전시 크랭크축에 접속하여 오일을 토출하는 고속용 펌프기어와; 및 상기 저속 및 고속용 펌프기어를 수용하는 펌프카바와 프런트케이스로 구성되며, 회전관성력이 작은 저속회전시에는 상기 저속용 펌프기어를 크랭크축에 키이 결합시키는 대신 고속용 펌프기어는 키이 결합 해제시키며 반대로 회전관성력이 큰 고속운전시에는 고속용 펌프기어를 크랭크축에 키이 결합시키고 저속용 펌프기어의 키이 결합 상태를 해제시키는 동력접속 변경기구가 크랭크축에 구비되어 있는 것을 특징으로 하는 펌핑용량 가변형 오일펌프.A low speed pump gear connected to the crankshaft to discharge oil during low speed operation of the engine; A high speed pump gear connected to the crankshaft to discharge oil during high speed operation of the engine; And a pump cover and a front case accommodating the low speed and high speed pump gears, and the high speed pump gears are decoupled from the high speed pump gears at the low speed rotation with low rotational inertia instead of engaging the keys with the crankshaft. In the case of high speed operation with high rotational inertia, the crankshaft is provided with a power connection changing mechanism for coupling the high speed pump gear to the crankshaft and releasing the key engagement of the low speed pump gear. . 제1항에 있어서, 상기 동력접속 변경기구는 시이소오 회동간과, 시이소오 회동간의 양끝에 접속되어 각기 반대방향으로 움직이는 저속용과 고속용의 레버, 그 고속용 레버의 도중에 장착된 관성체 및 상기 저속 및 고속용 레버의 끝단에 고정 장착되어 저속용 및 고속용 펌프기어의 키이홈에 선택적으로 결합 및 결합 해제되는 저속용 키이와 고속용 키이를 포함하는 것을 특징으로 하는 펌핑용량 가변형 오일펌프.2. The low speed and high speed levers connected to both ends of the seesaw rotation and the seesaw rotation, respectively, moving in opposite directions, the inertial body mounted in the middle of the high speed lever, and the low speed. And a low speed key and a high speed key that are fixedly mounted to the end of the high speed lever and selectively coupled and decoupled to the key grooves of the low speed and high speed pump gear. 제2항에 있어서, 상기 크랭크축의 회전력이 감소시 상기 관성체는 스프링에 의해 내측으로 당겨지게 되는 것을 특징으로 하는 펌핑용량 가변형 오일펌프.The oil pump of claim 2, wherein the inertia body is pulled inward by a spring when the rotational force of the crankshaft is reduced.
KR1019960072167A 1996-12-26 1996-12-26 A variable pumping capacity type oil pump KR100218891B1 (en)

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