KR20080056340A - Accumulator of transmission for vehicle - Google Patents

Accumulator of transmission for vehicle Download PDF

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KR20080056340A
KR20080056340A KR1020060129115A KR20060129115A KR20080056340A KR 20080056340 A KR20080056340 A KR 20080056340A KR 1020060129115 A KR1020060129115 A KR 1020060129115A KR 20060129115 A KR20060129115 A KR 20060129115A KR 20080056340 A KR20080056340 A KR 20080056340A
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South Korea
Prior art keywords
accumulator
brake
pressure
hydraulic
control
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KR1020060129115A
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Korean (ko)
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KR100852041B1 (en
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김민수
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현대자동차주식회사
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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
    • F16H61/0021—Generation or control of line pressure
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/0208—Selector apparatus with means for suppression of vibrations or reduction of noise
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0202—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 characterised by the signals used the signals being electric
    • F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0246—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by initiating reverse gearshift
    • 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
    • F16H61/0021—Generation or control of line pressure
    • F16H2061/0034—Accumulators for fluid pressure supply; Control thereof

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

An accumulator of an automatic transmission for a vehicle is provided to reduce impact due to a transmission gear shift by distributing an operating pressure through the accumulator installed on two points on a hydraulic line. An accumulator(10) of an automatic transmission is installed on a hydraulic line(P1) to reduce impact of a hydraulic pressure. The hydraulic pressure is controlled by a solenoid valve(20) and supplied to a brake(1). A first connection pipe(P2) is branched to both directions on the hydraulic line connected from the brake. The first connection pipe is connected to the accumulator and another accumulator(10-1) so as to distribute an operating pressure generated from the brake. A second connection pipe(P3) is connected from the another accumulator to the solenoid valve in order to control hydraulic pressure generated from the hydraulic line.

Description

차량용 자동변속기의 어큐뮬레이터{Accumulator of transmission for vehicle}Accumulator of automatic transmission for vehicle

도 1은 종래 차량용 어큐뮬레이터의 설치상태를 도시한 개략도,1 is a schematic diagram showing an installation state of a conventional vehicle accumulator,

도 2는 종래 어큐뮬레이터를 이용한 충격발생에 따른 측정을 나타낸 파형도,2 is a waveform diagram showing a measurement according to the impact generated using a conventional accumulator,

도 3은 본 발명에 따른 차량용 어큐뮬레이터의 설치상태를 도시한 개략도,3 is a schematic diagram showing an installation state of a vehicle accumulator according to the present invention;

도 4는 본 발명에 따른 어큐뮬레이터를 이용한 충격발생에 따른 측정을 나타낸 파형도.Figure 4 is a waveform diagram showing the measurement according to the impact generated using the accumulator according to the present invention.

* 도면의 주요부분에 대한 부호설명 ** Explanation of Signs of Major Parts of Drawings *

1: 브레이크 10, 10-1: 어큐뮬레이터1: brake 10, 10-1: accumulator

11: 실린더 하우징 12: 피스톤11: cylinder housing 12: piston

13: 압축스프링 20: 솔레노이드 밸브13: compression spring 20: solenoid valve

P1: 유압라인 P2: 제1연결관P1: hydraulic line P2: first connector

P3: 제2연결관P3: 2nd connector

본 발명은 차량용 자동변속기의 어큐뮬레이터에 관한 것으로서, 좀더 상세하 게는 변속레버의 작동으로 R(후진)레인지시 충격에 의한 유압변동을 제어할 수 있는 어큐뮬레이터를 추가적으로 구성하여 제어압을 통해 작동영역을 컨트롤하여 취약구간의 압력제어가 가능하도록 한 것이다.The present invention relates to an accumulator of an automatic transmission for a vehicle, and more particularly, an accumulator capable of controlling hydraulic fluctuations caused by an impact during an R (reverse) range by the operation of a shift lever further configures an operating region through a control pressure. It is to control the pressure in the weak section by controlling.

일반적으로 차량의 자동변속기에는 유압에 의하여 작동되는 클러치 및 브레이크로서, 트랜스밋션 제어 유닛(TCU)의 제어 신호에 의하여 솔레노이드 밸브가 제어되고, 이 솔레노이드 밸브의 제어에 의하여 마찰요소로 공급되는 유압이 제어되어 마찰요소를 인게이지 시킨다.In general, an automatic transmission of a vehicle is a clutch and a brake operated by hydraulic pressure. The solenoid valve is controlled by a control signal of a transmission control unit (TCU), and the hydraulic pressure supplied to the friction element is controlled by the control signal of the solenoid valve. To engage the friction element.

즉, 밸브 몸체에서 적정한 유압을 형성하여 각 단 클러치/브레이크를 계합시킴으로써 구동력을 전달하게 된다.That is, by forming an appropriate hydraulic pressure in the valve body to engage the respective clutch / brake to transmit the driving force.

이와 같이 상기와 같은 마찰요소를 갖게되는 클러치/브레이크를 통한 인게이지될 때에는 솔레노이드 밸브의 제어에 의하여 공급되는 유압이 갑자기 마찰요소를 인게이지시키기 때문에 변속 충격이 발생되는데, 변속 충격을 감소시키기 위하여 도 1에 도시된 바와 같이, TCU의 신호로 제어되는 솔레노이드 밸브(20)에 의하여 제어된 유압이 브레이크(1)로 공급되는 유압라인(P1) 상에는 독립적인 어큐뮬레이터(10)가 설치된다.In this way, when the clutch / brake having such a friction element is engaged, a shift shock occurs because the hydraulic pressure supplied by the control of the solenoid valve suddenly engages the friction element. As shown in FIG. 1, an independent accumulator 10 is installed on the hydraulic line P1 through which the hydraulic pressure controlled by the solenoid valve 20 controlled by the signal of the TCU is supplied to the brake 1.

상기 어큐뮬레이터(10)는 실린더 하우징(11)에 피스턴(12)이 내장되고, 이 피스턴(12)은 압축스프링(13)에 의해 설치된다.The accumulator 10 has a piston 12 built into the cylinder housing 11, and the piston 12 is installed by the compression spring 13.

상술한 바와 같이 구성된 어큐뮬레이터(10)는 TCU의 제어 신호를 받은 솔레노이드 밸브(20)가 듀티 제어이므로 유압라인(P1)에는 제어된 유압이 공급되어 브레레이크(1)를 인게이지시키기 위하여 공급되는 유압의 일부의 작용력을 흡수한다.In the accumulator 10 configured as described above, since the solenoid valve 20 receiving the control signal of the TCU is the duty control, the hydraulic pressure is supplied to the hydraulic line P1 so as to engage the brake 1. It absorbs some of the action force.

그러나, 클러치/브레이크가 계합될 때에 있어 항상 존재하는 모순이 있는데, 이는 변속응답성을 좋게 하기 위해 유압을 상승시키면 계합시의 충격이 발생되고, 충격을 줄이기 위해 유압을 낮추어 주면 변속지연이 발생하게 된다.However, there is a contradiction that always exists when the clutch / brake is engaged. If the hydraulic pressure is increased to improve the shift response, the shock is generated during engagement, and if the hydraulic pressure is lowered to reduce the shock, the shift delay is generated. do.

충격을 줄이기 위해 제어유압을 상대적으로 낮출 수 있는데, 제어유압이 낮을 시에는 어큐뮬레이터의 작동영역이 미확보되어 충격이 발생하게 된다.To reduce the impact, the control hydraulic pressure can be lowered relatively. When the control hydraulic pressure is low, the operating area of the accumulator is not secured, and the shock occurs.

도 2에서 도시된 바와 같은 방법은 클러치/브레이크 유압공급회로에 오리피스를 설치하여 공급유량을 줄이는 방법을 쓰기도 하는데, 이 방법은 냉간압력 해제시 압력이 잘 빠지지 않는 단점이 있다.The method as shown in Figure 2 also uses a method for reducing the supply flow rate by installing an orifice in the clutch / brake hydraulic supply circuit, this method has the disadvantage that the pressure is not released well when the cold pressure release.

이러한 문제점의 원인으로 R레인지시 별도의 유압제어 없이 라인압을 바로 Rev.브레이크로 공급하는데 브레이크 계합시 생기는 맥동을 어큐뮬레이터를 하나만으로 제어할 수밖에 없었다.As a cause of this problem, in the R range, line pressure is directly supplied to Rev. brake without any hydraulic control, and only one accumulator can control the pulsation generated during brake engagement.

즉, 어큐뮬레이터는 작동하는 일정압력구간이 정해져 있기 때문에 어큐뮬레이터 하나만으로 모두 제어할 수 없으며, 계합충격을 줄이기 위해 유압을 낮추는 것은 어큐뮬레이터의 작동시간이 변경되어 또 다른 영역에서 충격을 유발할 가능성이 있는 문제점이 있었다.In other words, since the accumulator has a fixed pressure range, the accumulator cannot be controlled by only one accumulator.Reducing the hydraulic pressure to reduce the engagement impact may cause the accumulator to change its operating time and cause shock in another area. there was.

본 발명은 상기와 같이 제반되는 종래의 문제점을 해결하기 위한 것으로, 변속레버의 작동으로 R(후진)레인지시 충격에 의한 유압변동을 제어할 수 있는 어큐뮬레이터를 추가적으로 구성하여 제어압을 통해 작동영역을 컨트롤하여 취약구간의 압력제어가 가능하도록 하는데 그 목적이 있다.The present invention is to solve the conventional problems as described above, by additionally configuring an accumulator that can control the hydraulic fluctuations due to impact during the R (reverse) range by the operation of the shift lever to the operating area through the control pressure Its purpose is to enable pressure control of the weak section by controlling it.

상기 목적을 달성하기 위한 본 발명에 의하면, 솔레노이드 밸브의 제어에 의해 압력의 세기가 제어된 유압이 브레이크로 공급되는 유압라인에 설치되어 유압의 충격을 감소시키는 차량용 자동변속기의 어큐뮬레이터에 있어서, 상기 브레이크로부터 연결되는 유압라인상에 제1연결관이 양측으로 분기되게 설치되고, 제1연결관의 양단으로부터는 상기 브레이크측으로부터 발생되는 작동압을 분산시키 수 있도록 상기 어큐뮬레이터의 연결과 함께 또 하나의 어큐뮬레이터가 설치되며, 상기 어큐뮬레이터로부터는 유압라인으로부터 발생되는 압력을 제어하기 위한 상기 솔레노이드 밸브측에 제2연결관이 연결 설치되어 구성된 것을 특징으로 한다.According to the present invention for achieving the above object, in the accumulator of the automatic transmission for a vehicle to reduce the impact of the hydraulic pressure is installed in the hydraulic line is supplied to the hydraulic pressure is supplied to the brake by the control of the solenoid valve, the brake The first connecting pipe is branched on both sides of the hydraulic line connected from the other side, and the accumulator is connected with the accumulator so as to disperse the operating pressure generated from the brake side from both ends of the first connecting pipe. Is installed, from the accumulator is characterized in that the second connecting pipe is connected and installed on the solenoid valve side for controlling the pressure generated from the hydraulic line.

이하, 본 발명을 첨부된 도 3 및 도 4를 참조하여 설명하면 다음과 같다.Hereinafter, the present invention will be described with reference to FIGS. 3 and 4.

첨부된 도 3은 본 발명에 따른 차량용 어큐뮬레이터의 설치상태를 도시한 개략도이고, 도 4는 본 발명에 따른 어큐뮬레이터를 이용한 충격발생에 따른 측정을 나타낸 파형도.3 is a schematic view showing an installation state of a vehicle accumulator according to the present invention, Figure 4 is a waveform diagram showing the measurement according to the impact generated using the accumulator according to the present invention.

본 발명은, 솔레노이드 밸브(20)의 제어에 의해 압력의 세기가 제어된 유압이 브레이크(1)로 공급되는 유압라인(P1)에 설치되어 유압의 충격을 감소시키는 차량용 자동변속기의 어큐뮬레이터(10)에 있어서, 상기 브레이크(1)로부터 연결되는 유압라인(P1)상에 제1연결관(P2)이 양측으로 분기되게 설치되고, 제1연결관(P2)의 양단으로부터는 상기 브레이크(1)측으로부터 발생되는 작동압을 분산시키 수 있도록 상기 어큐뮬레이터(10)의 연결과 함께 또 하나의 어큐뮬레이터(10-1)가 설치되며, 상기 어큐뮬레이터(10-1)로부터는 유압라인(P1)으로부터 발생되는 압력을 제어 하기 위한 상기 솔레노이드 밸브(20)측에 제2연결관(P3)이 연결 설치되어 구성된다.The present invention, the accumulator 10 of the automatic transmission for a vehicle to reduce the impact of the hydraulic pressure is installed in the hydraulic line (P1) is supplied to the brake 1, the hydraulic pressure is controlled by the control of the solenoid valve 20 In the above, the first connecting pipe (P2) is installed on both sides of the hydraulic line (P1) connected from the brake (1), the side of the brake (1) from both ends of the first connecting pipe (P2) Another accumulator 10-1 is installed together with the accumulator 10 so as to distribute the working pressure generated from the accumulator 10, and the pressure generated from the hydraulic line P1 from the accumulator 10-1. The second connection pipe (P3) is connected to the solenoid valve 20 side for controlling the configuration is configured.

상기 어큐뮬레이터(10)와 또 하나의 어큐뮬레이터(10-1)는 종래와 동일한 구조로 실린더 하우징(11) 내에 피스톤의 설치와 함께 상기 피스톤으로부터 탄성을 부여하기 위한 압축스프링(13)이 설치된 동일한 구조이다.The accumulator 10 and another accumulator 10-1 have the same structure as the conventional structure in which the compression spring 13 for imparting elasticity from the piston is installed together with the installation of the piston in the cylinder housing 11. .

상기와 같은 본원발명의 어큐뮬레이터(10),(10-1)는 상기 솔레노이드 밸브(20)와 전기적으로 연결 설치된 TCU(도면에서 생략함)로부터 솔레노이드 밸브(20)를 통해 작동압이 제어되는 구조로, 결국 브레이크(1)측으로부터 유압라인(P1)을 통해 발생된 작동압 유압변동은 일차적으로 제1연결관(P2)을 통한 어큐뮬레이터(10) 및 또 하나의 어큐뮬레이터(10-1)에서 제어된다.Accumulators 10 and 10-1 of the present invention as described above have a structure in which the operating pressure is controlled through the solenoid valve 20 from a TCU (not shown in the drawing) that is electrically connected to the solenoid valve 20. In the end, the hydraulic pressure hydraulic pressure generated through the hydraulic line P1 from the brake 1 side is primarily controlled by the accumulator 10 and another accumulator 10-1 through the first connecting pipe P2. .

상기 브레이크(1)는 자동변속기에 있어 미도시된 유성기어의 속도비를 변화시키기 위하여 제공되는 클러치 및 브레이크류를 지칭하는 것으로, 이 브레이크(1)는 오일펌프에서 펌핑되는 유압을 공급원으로 하여 인게이지 및 해제된다.The brake 1 refers to a clutch and a brake provided to change the speed ratio of the planetary gear not shown in the automatic transmission, and the brake 1 is derived from the oil pressure pumped from the oil pump as a source. Easy and released.

상기와 같은 브레이크(1)는 TCU의 제어 신호에 의해 솔레노이드 밸브(20)의 듀티 및 온/오프 제어로서 압력의 세기가 조정될 유압의 공급되어 제어되는 것이다.The brake 1 as described above is controlled by supplying hydraulic pressure whose pressure intensity is to be adjusted as the duty and on / off control of the solenoid valve 20 by the control signal of the TCU.

이와 같은 제어에 있어, 상기 어큐뮬레이터(10)와 또 하나의 어큐뮬레이터(10-1)로부터는 압력에 따라 적정압으로 피스톤(12)과 그 내부측의 압축스프링(13)을 순간 가압상태로 만들면서 충격을 흡수하는 작용을 하여 분산하여 줌으로서, 결국 기존의 구조에서와 같이 하나의 어큐뮬레이터에 받는 일정 압력구간의 제 어를 변화의 어려움을 해결할 수 있게 된다.In such a control, the accumulator 10 and the other accumulator 10-1 are made to pressurize the piston 12 and the compression spring 13 inside thereof at an appropriate pressure depending on the pressure. By absorbing and dispersing the shock, it is possible to solve the difficulty of changing the control of a constant pressure section received by one accumulator as in the conventional structure.

즉, 하나의 신규 어큐뮬레이터(10-1)를 더 추가하되, 유압라인(P1)으로부터 제1연결관(P2)을 통해 양측으로 압력이 전달될 수 있도록 하여 R레인지시 유압라인(P1)과 어큐뮬레이터(10)측의 유압변동에 따른 충격을 줄일 수 있고, 특히 압력을 잡아주는 상기 또 하나 마련된 어큐뮬레이터(10-1)의 작동되는 구간의 영역을 확대하여 제어할 수 있다.That is, one more accumulator 10-1 is added, but pressure can be transferred from the hydraulic line P1 to both sides through the first connecting pipe P2 so that the hydraulic line P1 and the accumulator at the time of R range. It is possible to reduce the impact caused by the hydraulic fluctuation of the (10) side, in particular to enlarge and control the area of the operating section of the provided accumulator (10-1) for holding the pressure.

상기와 같은 구조에 있어, 어큐뮬레이터의 영역부족으로 발생되는 충격의 정도는 첨부된 도 4에서 도시된 충격측정 파형도에서 알 수 있는 바와 같이, 어큐뮬레이터의 영역확보는 물론, 변속초기시 발생되는 충격의 발생을 현저히 낮게 발생되고 있음을 알 수 있었다.In the above structure, the degree of impact generated due to the lack of the accumulator region can be seen in the shock measurement waveform diagram shown in FIG. 4. It was found that the occurrence was significantly lower.

따라서 상기와 같은 어큐뮬레이터를 복수로 구성함에 있어, R레인지시 발생되는 변속충격을 현저히 줄일 수 있고 어큐뮬레이터의 정확한 작동시간과 또 다른 변속영역으로 이어질 때에 따라 변속충격의 유발가능성을 미연에 방지시킬 수 있는 이점이 제공된다.Therefore, in constructing a plurality of accumulators as described above, it is possible to remarkably reduce shift shocks generated in the R range, and to prevent the possibility of shift shocks in advance when the accumulator leads to the correct operation time and another shift range. This is provided.

이상에서와 같이 본 발명은 차량의 자동변속시 발생하는 충격을 잡아주기 위해 변속기측으로부터 설치되어 작동되는 순간 압력을 완화시켜 주는 어큐뮬레이터 구조를 유압라인선상에서 2지점 설치하여 작동압을 분산시켜 충격및 유압의 맥동을 줄여 특히, 변속초기시 R(후진)레인지시 발생되는 제어압을 통해 작동영역을 컨트롤하여 또 다른 변속 영역에서도 변속에 의한 충격을 줄일 수 있는 압력제어가 가 능해 진다.As described above, the present invention installs an accumulator structure for relieving the instantaneous pressure when installed and operated from the transmission side to catch the shock generated during the automatic shifting of the vehicle. By reducing the pulsation of the hydraulic pressure, in particular, the operating pressure is controlled by the control pressure generated during the R (reverse) range at the beginning of the shift, thereby enabling pressure control to reduce the impact of the shift even in another shift range.

Claims (1)

솔레노이드 밸브(20)의 제어에 의해 압력의 세기가 제어된 유압이 브레이크(1)로 공급되는 유압라인(P1)에 설치되어 유압의 충격을 감소시키는 차량용 자동변속기의 어큐뮬레이터(10)에 있어서,In the accumulator 10 of the automatic transmission for a vehicle which reduces the impact of the hydraulic pressure is installed in the hydraulic line (P1) is supplied to the hydraulic pressure (P1) is supplied to the brake 1 by the control of the solenoid valve 20, 상기 브레이크(1)로부터 연결되는 유압라인(P1)상에 제1연결관(P2)이 양측으로 분기되게 설치되고, 제1연결관(P2)의 양단으로부터는 상기 브레이크(1)측으로부터 발생되는 작동압을 분산시키 수 있도록 상기 어큐뮬레이터(10)의 연결과 함께 또 하나의 어큐뮬레이터(10-1)가 설치되며, 상기 어큐뮬레이터(10-1)로부터는 유압라인(P1)으로부터 발생되는 압력을 제어하기 위한 상기 솔레노이드 밸브(20)측에 제2연결관(P3)이 연결 설치되어 구성된 것을 특징으로 하는 차량용 자동변속기의 어큐뮬레이터.The first connecting pipe (P2) is installed on both sides of the hydraulic line (P1) connected from the brake (1), and is generated from both ends of the first connecting pipe (P2) from the brake (1) side Another accumulator 10-1 is installed together with the accumulator 10 so as to disperse the working pressure, and to control the pressure generated from the hydraulic line P1 from the accumulator 10-1. Accumulator of the automatic transmission for a vehicle, characterized in that the second connecting pipe (P3) is installed and installed on the solenoid valve 20 side.
KR1020060129115A 2006-12-18 2006-12-18 Accumulator of transmission for vehicle KR100852041B1 (en)

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KR20180015560A (en) * 2016-08-03 2018-02-13 로오데운트쉬바르츠게엠베하운트콤파니카게 Measurement system and a method

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KR980003062A (en) * 1996-06-04 1998-03-30 김영귀 Line pressure control system of automatic transmission for automobile
JP3634946B2 (en) * 1997-07-11 2005-03-30 ジヤトコ株式会社 Automatic transmission accumulator device
JP2005119784A (en) * 2003-10-15 2005-05-12 Toyota Industries Corp Vibration suppression device for vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180015560A (en) * 2016-08-03 2018-02-13 로오데운트쉬바르츠게엠베하운트콤파니카게 Measurement system and a method

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