KR20210016149A - Cvt system using hydraulic pump - Google Patents

Cvt system using hydraulic pump Download PDF

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Publication number
KR20210016149A
KR20210016149A KR1020190093537A KR20190093537A KR20210016149A KR 20210016149 A KR20210016149 A KR 20210016149A KR 1020190093537 A KR1020190093537 A KR 1020190093537A KR 20190093537 A KR20190093537 A KR 20190093537A KR 20210016149 A KR20210016149 A KR 20210016149A
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South Korea
Prior art keywords
hydraulic pump
output shaft
variable transmission
continuously variable
pump
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KR1020190093537A
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Korean (ko)
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김세철
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(주)테너지
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Priority to KR1020190093537A priority Critical patent/KR20210016149A/en
Publication of KR20210016149A publication Critical patent/KR20210016149A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
    • F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/433—Pump capacity control by fluid pressure control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
    • F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
    • F16H2061/66286—Control for optimising pump efficiency

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Transmission Device (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The present invention relates to a continuously variable transmission using a hydraulic pump and, more specifically, to a continuously variable transmission system using a hydraulic pump, wherein an output shaft is operated at a number of revolutions required to perform continuously variable transmission by receiving power transmitted from a power source, an engine, a motor, or others. The continuously variable transmission using a hydraulic pump according to the present invention determines the number of revolutions of the output shaft with respect to a number of revolutions of an input shaft for driving a hydraulic pump, which is a transmission ratio, by allowing a flow rate adjusting valve for controlling a discharge rate of a discharge port in the hydraulic pump to adjust an amount of fluid circulated in a hydraulic pump system. Since the transmission ratio can be changed from one to one to infinity by the hydraulic pump, the transmission ratio required depending on the purpose of use can be obtained by adjusting a flow rate. In addition, the continuously variable transmission has much better transmission efficiency than that of a variable transmission system using an eddy current.

Description

유압 펌프를 이용한 무단 변속 시스템{CVT SYSTEM USING HYDRAULIC PUMP}Continuously variable transmission system using hydraulic pump {CVT SYSTEM USING HYDRAULIC PUMP}

본 발명은 유압 펌프를 이용한 무단 변속기에 관한 것으로서, 더욱 상세하게는 엔진이나 모터 등의 동력원으로부터의 동력을 전달 받아서 요구되는 회전수로 회전하게 하는 무단 변속기에 관한 것으로, 유압 펌프의 토출구에서의 유량을 제어함으로써 출력축의 회전 속도를 적절히 선택할 수 있는 무단 변속 시스템에 대한 것이다.The present invention relates to a continuously variable transmission using a hydraulic pump, and more particularly, to a continuously variable transmission that receives power from a power source such as an engine or a motor and rotates at a required rotational speed, and the flow rate at the discharge port of the hydraulic pump It relates to a continuously variable transmission system capable of appropriately selecting the rotational speed of the output shaft by controlling

일반적으로 무단 변속기는 무단 변속을 통하여 동력원이 최적 운전 조건 하에서 작동되도록 함으로써 연비 향상이 가능하게 하는 장점을 가지고 있으나, 무단 변속 시스템의 전달 효율이 낮다는 단점을 가지고 있다. 특히, 와전류를 이용한 무단 변속기는 구조가 간단하고 원가가 저렴한 장점을 가지고 있는 반면, 전달 효율이 낮고 작동 중에 발열이 많이 되는 단점이 있으며, 또한 자석의 수나 자력에 따라 하나의 시스템은 일정한 변속비로만 작동이 되도록 되어 있어서 사용자의 필요에 따라 변속비를 마음대로 변경할 수 없다는 단점을 가지고 있다.In general, the continuously variable transmission has the advantage of enabling fuel efficiency to be improved by allowing the power source to be operated under optimum operating conditions through the continuously variable transmission, but has a disadvantage in that the transmission efficiency of the continuously variable transmission system is low. In particular, the continuously variable transmission using eddy current has the advantage of having a simple structure and low cost, but has a disadvantage of low transmission efficiency and high heat generation during operation.In addition, one system operates only with a constant transmission ratio depending on the number of magnets or magnetic force It has the disadvantage that the transmission ratio cannot be freely changed according to the user's needs.

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 동력원으로부터 동력을 전달 받아 필요로 하는 회전수로 회전되도록 하는 무단 변속이 가능함과 동시에, 전달 효율이 우수한 변속 시스템을 제공하기 위한 것이다. The present invention is to solve the above problems, and at the same time, it is possible to continuously change the speed to rotate at a required rotational speed by receiving power from a power source, and to provide a transmission system with excellent transmission efficiency.

상기와 같은 목적을 달성하기 위하여 본 발명은, 유압 펌프에 있어서 토출구로의 토출량을 제어하여 무단 변속이 가능하게 함으로써, 전달 효율이 우수하며 동시에 원가가 저렴한 무단 변속 시스템을 제공하고자 한다. In order to achieve the above object, the present invention is to provide a continuously variable transmission system having excellent transmission efficiency and low cost by controlling a discharge amount to a discharge port in a hydraulic pump to enable stepless speed change.

상술한 바와 같은 목적을 구현하기 위한 본 발명에 따른 유압 펌프를 이용한 무단 변속 시스템은, 유압 펌프의 구동 기어나 로우터 등이 입력축에 연결되고, 펌프의 하우징이 출력축에 연결되어 있으며, 유량 조절 장치가 유압 펌프의 토출구에서 나온 유량을 제어하도록 설치되어 있어서 유량 조절에 따라 출력축의 회전수가 변경되어 작동하는 것을 특징으로 할 수 있다.In the continuously variable transmission system using the hydraulic pump according to the present invention for realizing the above-described object, the drive gear or rotor of the hydraulic pump is connected to the input shaft, the housing of the pump is connected to the output shaft, and the flow control device is Since it is installed to control the flow rate from the discharge port of the hydraulic pump, the number of rotations of the output shaft is changed according to the flow rate control to operate.

유압 펌프의 구동 기어나 로우터 등이 출력축에 연결되고, 펌프의 하우징이 입력축에 연결되어 있으며, 유량 조절 장치가 유압 펌프의 토출구에서 나온 유량을 제어하도록 설치되어 있어서 유량 조절에 따라 출력축의 회전수가 변경되어 작동하는 것을 특징으로 할 수 있다.The drive gear or rotor of the hydraulic pump is connected to the output shaft, the housing of the pump is connected to the input shaft, and a flow control device is installed to control the flow rate from the discharge port of the hydraulic pump. It can be characterized by being operated.

유압 펌프의 구동 기어나 로우터 등이 입력축에 연결되고, 펌프의 하우징이 출력축에 연결되어 있으며, 유압 펌프의 토출구에서 나오는 유량이 일정하게 설정되어 있어서 출력축의 회전수가 일정한 범위 내에서 작동하는 것을 특징으로 할 수 있다.The drive gear or rotor of the hydraulic pump is connected to the input shaft, the housing of the pump is connected to the output shaft, and the flow rate from the discharge port of the hydraulic pump is set constant, so that the number of rotations of the output shaft is operated within a certain range. can do.

유압 펌프의 구동 기어나 로우터 등이 출력축에 연결되고, 펌프의 하우징이 입력축에 연결되어 있으며, 유압 펌프의 토출구에서 나오는 유량이 일정하게 설정되어 있어서 출력축의 회전수가 일정한 범위 내에서 작동하는 것을 특징으로 할 수 있다.The drive gear or rotor of the hydraulic pump is connected to the output shaft, the housing of the pump is connected to the input shaft, and the flow rate from the discharge port of the hydraulic pump is set constant, so the rotation speed of the output shaft operates within a certain range. can do.

이상에서 살펴 본 바와 같이, 본 발명에 의한 유압 펌프를 이용한 무단 변속 시스템은, 유압 펌프를 구성하는 기어 또는 하우징 등을 입력축 또는 출력축으로 이용하기 때문에, 그 구조가 간단하고 부품수가 적기 때문에, 원가가 저렴하고 중량이 가벼운 무단 변속 시스템의 구성이 가능하다.As described above, since the continuously variable transmission system using the hydraulic pump according to the present invention uses a gear or housing constituting the hydraulic pump as an input shaft or an output shaft, the structure is simple and the number of parts is small, so the cost is It is possible to construct a continuously variable transmission system that is inexpensive and light in weight.

상기와 같이 유압 펌프 만으로 무단 변속이 이루어지므로, 최소의 부품으로 필요한 회전수를 얻을 수 있는 단순한 구조의 무단 변속 시스템의 제작이 가능하다.As described above, since the stepless speed change is performed only with the hydraulic pump, it is possible to manufacture a stepless speed change system having a simple structure that can obtain a required number of revolutions with a minimum number of parts.

또한, 유압 펌프의 작동 효율에 상당하는 전달 효율을 가지는 무단 변속 시스템을 구성할 수 있게 되므로 와전류를 이용한 무단 변속기에 비하여 전달 효율이 우수한 장점을 가진다.In addition, since it is possible to configure a continuously variable transmission system having a transmission efficiency equivalent to the operating efficiency of a hydraulic pump, the transmission efficiency is superior to that of a continuously variable transmission using an eddy current.

도 1은 본 발명에 따른 유압 펌프를 이용한 무단 변속 시스템의 일 실시예를 보여주는 단면도이다.1 is a cross-sectional view showing an embodiment of a continuously variable transmission system using a hydraulic pump according to the present invention.

이하 첨부한 도면을 참조하여 본 발명의 구체적인 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of a specific embodiment of the present invention will be described in detail with reference to the accompanying drawings.

여기서, 각 도면의 구성요소들에 대해 참조부호를 부가함에 있어서 동일한 구성요소들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호로 표기되었음에 유의하여야 한다.Here, in adding reference numerals to elements of each drawing, it should be noted that the same elements are marked with the same numerals as much as possible, even if they are indicated on different drawings.

도 1은 본 발명에 따른 유압 펌프를 이용한 무단 변속 시스템의 일 실시예를 보여주는 단면도이다.1 is a cross-sectional view showing an embodiment of a continuously variable transmission system using a hydraulic pump according to the present invention.

도 1에서 보는 바와 같이, 입력축(4)이 오일 펌프의 구동 기어(1)와 일체로 연결되어 구동 기어(1)가 회전하면, 기어 펌프가 작동하게 되어 오일이 순환하도록 되어 있다. 또한, 기어 펌프의 하우징(6)은 출력축(7)에 연결되어 있어서 구동 기어(1)에서 전달된 동력을 전달한다.As shown in FIG. 1, when the input shaft 4 is integrally connected with the drive gear 1 of the oil pump and the drive gear 1 rotates, the gear pump operates and the oil is circulated. In addition, the housing 6 of the gear pump is connected to the output shaft 7 to transmit the power transmitted from the drive gear 1.

출력축(7)과 일체로 구성되는 펌프 하우징(6)에는 유로(5)가 형성되어 있어서, 펌프의 토출구에서 나온 오일이 순환하여 펌프의 흡입구로 들어가도록 연결되어 있으며, 유로의 중간에는 유량 제어 밸브(3)가 설치되어 있어서 순환되는 오일의 양을 제어한다.A flow path 5 is formed in the pump housing 6 integrally configured with the output shaft 7, and is connected to circulate the oil from the discharge port of the pump to enter the suction port of the pump, and a flow control valve in the middle of the flow path (3) is installed to control the amount of circulating oil.

유량 제어 밸브(3)가 완전히 열려 있을 경우에는 오일 펌프에 작용하는 저항이 최소가 되므로, 구동 기어(1)에서 오일 펌프 하우징(6)에 전달되는 회전력이 최소가 되어, 출력축인 오일 펌프 하우징(6)의 회전수가 최소로 되고 변속비는 가장 큰 상태가 된다.When the flow control valve (3) is fully open, the resistance acting on the oil pump is minimized, so the rotational force transmitted from the drive gear (1) to the oil pump housing (6) is minimized, and the oil pump housing ( The number of revolutions of 6) is minimized and the transmission ratio becomes the largest.

유량 제어 밸브(3)를 닫아 토출구를 통하여 빠져 나오는 오일의 유량을 적게 하면, 오일 펌프 내부에서의 유압은 상승하게 되고, 구동 기어(1)와 오일 펌프 하우징(6)의 상대 회전에 따른 저항이 증가하게 되므로 출력축(7)의 회전수는 증가한다.When the flow rate of the oil exiting through the discharge port is reduced by closing the flow control valve (3), the hydraulic pressure inside the oil pump increases, and the resistance due to the relative rotation of the drive gear (1) and the oil pump housing (6) is reduced. As it increases, the number of rotations of the output shaft 7 increases.

유량 제어 밸브(3)를 완전히 닫아 펌프에서 오일이 토출구로 나갈 수 없게 되면 구동 기어(1)와 오일 펌프 하우징(6)의 상대 회전 저항이 최대로 되고, 이에 따라 구동 기어(1)에서 오일 펌프 하우징(6)에 전달되는 회전력이 최대가 되므로, 출력축(7)과 일체인 오일 펌프 하우징(6)은 최대 속도로 회전하게 된다. 이때, 출력축(7)에 작용되는 저항이 크지 않으면 출력축(7)이 입력축(4)과 같은 속도로 회전하게 되어, 변속비가 일대일로 된다.When the flow control valve (3) is completely closed and the oil cannot exit from the pump to the discharge port, the relative rotational resistance between the drive gear (1) and the oil pump housing (6) is maximized, and accordingly, the oil pump from the drive gear (1) Since the rotational force transmitted to the housing 6 is maximized, the oil pump housing 6 integral with the output shaft 7 rotates at the maximum speed. At this time, if the resistance applied to the output shaft 7 is not large, the output shaft 7 rotates at the same speed as the input shaft 4, so that the transmission ratio becomes one-to-one.

따라서, 유량 제어 밸브(3)를 이용하여 토출구에서의 유량을 제어함으로써 출력축의 회전 속도를 조절하는 것이 가능하게 되므로, 토출 유량을 제어함으로써 필요로 하는 변속비를 얻을 수 있게 된다.Accordingly, it is possible to control the rotational speed of the output shaft by controlling the flow rate at the discharge port by using the flow rate control valve 3, so that the required transmission ratio can be obtained by controlling the discharge flow rate.

한편, 출력축에 작용하는 저항이 커지게 되면 변속비는 일대일보다 작게 된다. 출력축의 저항이 커지게 되면 출력축의 회전수가 감소하게 되고, 이에 따라 입력축과 출력축의 회전 속도 차이가 증가하게 되므로 펌프 내측의 유압이 상승하게 되고, 유압 상승에 따라 출력축에 전달되는 회전력도 증가하게 된다. 결과적으로, 출력축은 출력축에 전달되는 회전력과 출력축에 작용하는 저항이 평형을 이루는 회전수로 수렴하여 회전하게 된다.On the other hand, when the resistance acting on the output shaft increases, the transmission ratio becomes smaller than one-to-one. When the resistance of the output shaft increases, the number of rotations of the output shaft decreases. Accordingly, the difference in rotation speed between the input shaft and the output shaft increases, so the hydraulic pressure inside the pump increases, and the rotational force transmitted to the output shaft increases as the hydraulic pressure rises. . As a result, the output shaft rotates by converging at the rotational speed at which the rotational force transmitted to the output shaft and the resistance acting on the output shaft are balanced.

그러므로, 입력축의 속도가 변화하는 경우에 있어서, 토출 유량을 적절히 제어함으로써 출력축이 어느 범위 내에서 적절한 속도로 회전하도록 제어하는 것이 가능하게 된다.Therefore, when the speed of the input shaft changes, it becomes possible to control the output shaft to rotate at an appropriate speed within a certain range by appropriately controlling the discharge flow rate.

즉, 이상과 같이 유량 제어 밸브를 이용하여 펌프 토출구에서의 유량을 조절함으로써 변속비를 일대일에서 무한대까지 변경할 수 있게 되므로, 필요에 따라 유량 조절 밸브의 제어를 통하여 변속비를 조절할 수 있는 무단 변속기의 구성이 가능하게 된다.That is, since the transmission ratio can be changed from one-to-one to infinity by adjusting the flow rate at the pump discharge port using the flow control valve as described above, the configuration of a continuously variable transmission capable of controlling the transmission ratio through the control of the flow control valve as necessary It becomes possible.

또한, 위에서 설명한 것과 반대로, 오일 펌프 하우징(6)을 입력축으로 이용하고, 기어(1)를 출력축으로 사용하는 경우에도 동일한 방식에 의하여 작동되는 무단 변속 시스템의 구성이 가능하다.In addition, contrary to the above description, even when the oil pump housing 6 is used as an input shaft and the gear 1 is used as an output shaft, a continuously variable transmission system operated in the same manner can be configured.

도 1에서는 기어 펌프를 예시하여 설명하였으나, 기어 펌프 외에도 베인 펌프, 로타리 펌프, 플런저 펌프 등 다른 종류의 펌프에 있어서도 기어 펌프에서와 마찬가지 원리로 작동하게 된다.In FIG. 1, a gear pump is illustrated and described, but other types of pumps such as a vane pump, a rotary pump, and a plunger pump, in addition to the gear pump, operate on the same principle as the gear pump.

따라서, 무단 변속 시스템의 사용 목적에 따라 전달 효율, 정숙성 등에 있어서 적합한 특성을 가진 유압 펌프를 이용하여 무단 변속 시스템을 구성하는 것이 바람직하다.Therefore, it is desirable to configure the continuously variable transmission system using a hydraulic pump having characteristics suitable for transmission efficiency, quietness, and the like according to the purpose of use of the continuously variable transmission system.

이상에서는 본 발명을 특정의 구체적인 실시 예를 들어 도시하고 설명하였으나, 본 발명은 상기한 실시 예에 한정되지 않으며 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양한 변경과 수정이 가능함은 물론이다.In the above, the present invention has been illustrated and described with reference to specific specific embodiments, but the present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit of the present invention.

1 : 구동기어 2 : 종동기어
3 : 유량 조절 밸브 4 : 입력축
5 : 유로 6 : 펌프 하우징
7 : 출력축1: drive gear 2: driven gear
3: flow control valve 4: input shaft
5: flow path 6: pump housing
7: output shaft

Claims (4)

유압 펌프의 구동 기어나 로우터 등이 입력축에 연결되고, 펌프의 하우징이 출력축에 연결되어 있으며, 유량 조절 장치가 유압 펌프의 토출구에서 나온 유량을 제어하도록 설치되어 있어서 유량 조절에 따라 출력축의 회전수가 변경되어 작동하는 것을 특징으로 하는 유압 펌프를 이용한 무단 변속 시스템.
The drive gear or rotor of the hydraulic pump is connected to the input shaft, the housing of the pump is connected to the output shaft, and a flow control device is installed to control the flow rate from the discharge port of the hydraulic pump. Stepless transmission system using a hydraulic pump, characterized in that to operate.
 유압 펌프의 구동 기어나 로우터 등이 출력축에 연결되고, 펌프의 하우징이 입력축에 연결되어 있으며, 유량 조절 장치가 유압 펌프의 토출구에서 나온 유량을 제어하도록 설치되어 있어서 유량 조절에 따라 출력축의 회전수가 변경되어 작동하는 것을 특징으로 하는 유압 펌프를 이용한 무단 변속 시스템.
The drive gear or rotor of the hydraulic pump is connected to the output shaft, the housing of the pump is connected to the input shaft, and a flow control device is installed to control the flow rate from the discharge port of the hydraulic pump. Stepless transmission system using a hydraulic pump, characterized in that to operate.
 유압 펌프의 구동 기어나 로우터 등이 입력축에 연결되고, 펌프의 하우징이 출력축에 연결되어 있으며, 유압 펌프의 토출구에서 나오는 유량이 일정하게 설정되어 있어서 출력축의 회전수가 일정한 범위 내에서 작동하는 것을 특징으로 하는 유압 펌프를 이용한 무단 변속 시스템.
The drive gear or rotor of the hydraulic pump is connected to the input shaft, the housing of the pump is connected to the output shaft, and the flow rate from the discharge port of the hydraulic pump is set constant, so that the number of rotations of the output shaft is operated within a certain range. Stepless transmission system using a hydraulic pump.
 유압 펌프의 구동 기어나 로우터 등이 출력축에 연결되고, 펌프의 하우징이 입력축에 연결되어 있으며, 유압 펌프의 토출구에서 나오는 유량이 일정하게 설정되어 있어서 출력축의 회전수가 일정한 범위 내에서 작동하는 것을 특징으로 하는 유압 펌프를 이용한 무단 변속 시스템.The drive gear or rotor of the hydraulic pump is connected to the output shaft, the housing of the pump is connected to the input shaft, and the flow rate from the discharge port of the hydraulic pump is set constant, so the rotation speed of the output shaft operates within a certain range. Stepless transmission system using a hydraulic pump.
KR1020190093537A 2019-07-31 2019-07-31 Cvt system using hydraulic pump KR20210016149A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022169218A1 (en) 2021-02-04 2022-08-11 주식회사 엘지화학 Method for preparation of deuterated anthracene compound, reaction composition, deuterated anthracene compound, and composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022169218A1 (en) 2021-02-04 2022-08-11 주식회사 엘지화학 Method for preparation of deuterated anthracene compound, reaction composition, deuterated anthracene compound, and composition

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