JPS61127965A - Troidal type continuously variable transmission - Google Patents
Troidal type continuously variable transmissionInfo
- Publication number
- JPS61127965A JPS61127965A JP25000084A JP25000084A JPS61127965A JP S61127965 A JPS61127965 A JP S61127965A JP 25000084 A JP25000084 A JP 25000084A JP 25000084 A JP25000084 A JP 25000084A JP S61127965 A JPS61127965 A JP S61127965A
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic piston
- actuator
- control valve
- continuously variable
- variable transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
- F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
- F16H15/04—Gearings providing a continuous range of gear ratios
- F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
- F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
- F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
- F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Friction Gearing (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
【発明の詳細な説明】
発明の分野
本発明は入出力ディスク間にパワーローラを圧接状態で
配置し、このパワーローラの傾きを変えることによって
無段変速を行うことができるトロイダル形無段変速機に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention provides a toroidal continuously variable transmission in which a power roller is placed in pressure contact between input and output disks, and by changing the inclination of the power roller, continuously variable speed can be achieved. It is related to.
従来技術とその問題点
従来、特開昭５８−、−５４２６２号公報に記載のよう
に、パワーローラを回転自在に支持する支持体をそれ自
身の軸方向（パワーローラ軸と直交する方向）に作動さ
せることにより、パワーローラに作用する接線方向の力
の方向を変化させ、この接線方向の力の分力によってパ
ワーローラの傾きを変えるようにしたトロイダル形無段
変速機が知られている。Prior art and its problems Conventionally, as described in Japanese Patent Laid-Open No. 58-54262, a support body that rotatably supports a power roller is oriented in its own axial direction (direction perpendicular to the power roller axis). A toroidal continuously variable transmission is known in which the direction of a tangential force acting on a power roller is changed by actuation, and the inclination of the power roller is changed by a component of this tangential force.
この場合には、支持体の両端部にシリンダ室を設けると
ともに、シリンダ室と油圧供給源との間に制御弁を設け
、この制御弁により各シリンダ室への油圧を制御するこ
とによって、支持体を軸方向に作動させている。上記制
御弁はハウジングに立設された支持柱に挿通され、下面
がばねで弾性的に支持されるとともに、支持柱の上端部
に螺合した制御ノブを回すことによって制御弁を上下に
動作させるようになっている。In this case, cylinder chambers are provided at both ends of the support, and a control valve is provided between the cylinder chamber and the hydraulic pressure supply source, and the control valve controls the hydraulic pressure to each cylinder chamber. is operated in the axial direction. The above-mentioned control valve is inserted into a support column installed upright in the housing, and its lower surface is elastically supported by a spring, and the control valve is moved up and down by turning a control knob screwed onto the upper end of the support column. It looks like this.
上記制御ノブを回すためには、例えばステッパモータな
どの電気的なアクチュエータを用いることができるが、
この種の電気的アクチュエータの場合には制御ノブをど
れだけ動かすかを常時信号を送って制御しなければなら
ないため、制御系が複雑になるとともに、基準位置の調
整が面倒となるという問題がある。しかも、動力源とし
て電気を使用しているため、電源の電圧変動により調整
に狂いが生じるおそれがあった。An electric actuator, such as a stepper motor, can be used to turn the control knob, but
In the case of this type of electric actuator, it is necessary to constantly send signals to control how much the control knob should be moved, which makes the control system complex and makes it troublesome to adjust the reference position. . Moreover, since electricity is used as a power source, there is a risk that adjustment may be disrupted due to voltage fluctuations in the power supply.
発明の目的
本発明はかかる従来の問題点に鑑みてなされたもので、
その目的は、上記制御弁に相当するコントロールバルブ
の可動部材の一方を油圧を用いて動作させるようにし、
制御の簡素化を図ったトロイダル形無段変速機を提供す
ることにある。Purpose of the Invention The present invention has been made in view of such conventional problems.
The purpose is to operate one of the movable members of the control valve corresponding to the control valve using hydraulic pressure,
An object of the present invention is to provide a toroidal continuously variable transmission with simplified control.
発明の構成
上記目的を達成するために、本発明は、コントロールバ
ルブの可動部材の一方を動作させるアクチュエータを、
油圧ピストンと、該油圧ピストンの片側の室に収容され
、油圧ピストンを他方側へ付勢するスプリングと、変速
比制御装置からの信号により油圧ピストンの他方側の室
への油圧を制御するソレノイドバルブとで構成したもの
である。Structure of the Invention In order to achieve the above object, the present invention provides an actuator that operates one of the movable members of a control valve.
A hydraulic piston, a spring housed in a chamber on one side of the hydraulic piston and biasing the hydraulic piston toward the other side, and a solenoid valve that controls oil pressure to the chamber on the other side of the hydraulic piston based on a signal from a gear ratio control device. It is composed of
すなわち、ソレノイドバルブをＯＮ、ＯＦＦさせること
により、油圧ピストンの他方側の室への油圧をＯＮ、Ｏ
ＦＦさせ、油圧ピストンを前進あるいは後退させるよう
にしたので、変速比制御装置はソレノイドバルブにＯＮ
またはＯＦＦ信号を送るだけで済み、制御が簡単となる
とともに、基準位置はピストンの端面で容易に決定でき
る。また、動力源として油圧を用いているので、電圧変
動等によって悪影響を受けるおそれもない。That is, by turning the solenoid valve ON and OFF, the hydraulic pressure to the chamber on the other side of the hydraulic piston is turned ON and OFF.
FF and move the hydraulic piston forward or backward, so the gear ratio control device turns on the solenoid valve.
Alternatively, it is only necessary to send an OFF signal, which simplifies control, and the reference position can be easily determined from the end face of the piston. Furthermore, since hydraulic pressure is used as the power source, there is no risk of being adversely affected by voltage fluctuations or the like.
実施例の説明
第１図は本発明にかかるトロイダル形無段変速機の一例
を示し、１はトロイダル変速部、２ｏはコントロールバ
ルブでアル。DESCRIPTION OF EMBODIMENTS FIG. 1 shows an example of a toroidal continuously variable transmission according to the present invention, where 1 is a toroidal transmission section and 2o is a control valve.
トロイダル変速部１の対向する入力ディスク２と出力デ
ィスク（図示せず）とは箱型のハウジング３内に回動自
在に支持されており、両ディスクの間には２個のパワー
ローラ４が圧接状態で配置され、それぞれのパワーロー
ラ４は軸５を介して支持体６によって回転自在に支持さ
れている。支持体６の両端部には、ハウジング３に形成
したシリンダ室？、８，９．１０内を摺動自在なピスト
ン１１，１２，１３．１４が連接されており、上記支持
体６はピストンとともに軸方向（図中、上下方向）に移
動可能であり、かつ自身の軸の回りに回動可能である。An input disk 2 and an output disk (not shown) facing each other in the toroidal transmission section 1 are rotatably supported in a box-shaped housing 3, and two power rollers 4 are pressed between the two disks. Each power roller 4 is rotatably supported by a support 6 via a shaft 5. A cylinder chamber formed in the housing 3 is provided at both ends of the support body 6. , 8, 9. 10 are connected with slidable pistons 11, 12, 13. It is rotatable around the axis.
コントロールバルブ２０は、ハウジング３の下側面に固
定されたバルブボデー２１と、バルブボデー２１内に摺
動自在に挿入されたスリーブ２２と、スリーブ２２内に
摺動自在に挿入されたスプール２３との３Ｎ構造となっ
ている。上記スリーブ２２の左端部には軸２４が直径方
向に架は渡してあり、この軸２４に当接する変速比制御
装置のアクチュエータ２５によってスリーブ２２は軸方
向に作動され、一方スブール２３は、その右端面に当接
する揺動自在なベルクランク２６を介してプリシスカム
２７により従動せしめられる。上記軸２４をアクチュエ
ータ２５と常時当接させ、かつスプール２３の右端面を
ベルクランク２６を介してブリシスカム２７と常時当接
させるために、スプール２３の左端面と軸２４との間に
スプリング２８が介装されている。上記プリシスカム２
７は右側の支持体６の下端部とロッド２９によって連結
されており、これによりブリシスカム２７は支持体６と
一体に回転してスプール２３を進退させる。The control valve 20 includes a valve body 21 fixed to the lower surface of the housing 3, a sleeve 22 slidably inserted into the valve body 21, and a spool 23 slidably inserted into the sleeve 22. It has a 3N structure. A shaft 24 extends diametrically across the left end of the sleeve 22, and the sleeve 22 is actuated in the axial direction by an actuator 25 of a gear ratio control device that comes into contact with the shaft 24. It is driven by a precise cam 27 via a swingable bell crank 26 that comes into contact with a surface. A spring 28 is installed between the left end surface of the spool 23 and the shaft 24 in order to keep the shaft 24 in constant contact with the actuator 25 and the right end surface of the spool 23 in constant contact with the brisis cam 27 via the bell crank 26. It has been intervened. Presiscum 2 above
7 is connected to the lower end of the right support 6 by a rod 29, whereby the brisis cam 27 rotates together with the support 6 to move the spool 23 forward and backward.
コントロールバルブ２０の中央部に形成したポート３０
には油圧源からライン圧が供給されており、左側のポー
ト３１には右上部および左下部のシリンダ室９，８と連
通する配管３２が接続され、右側のポート３３には左上
部および右下部のシリンダ室７．ｌＯと連通する配管３
４が接続されている。Port 30 formed in the center of control valve 20
is supplied with line pressure from a hydraulic source, a port 31 on the left side is connected to a pipe 32 that communicates with the upper right and lower left cylinder chambers 9, 8, and a port 33 on the right side is connected to the upper left and lower right cylinder chambers. cylinder chamber 7. Piping 3 communicating with IO
4 are connected.
第２図は上記アクチュエータ２５の構造を示し、４０は
油圧ピストン、５０はソレノイドバルブである。上記油
圧ピストン４０には一体に操作捧４１が連結されており
、この操作棒４１の先端が上記コントロールバルブ２０
の軸２４に当接している。油圧ピストン４０の左側の室
４２にはスプリング４３が収容されており、このスプリ
ング４３は油圧ピストン４０を常時右方へ付勢している
。また、油圧ピストン４０の右側の室４４には油路４５
が連結されており、この油路４５を介してライン圧が作
用するようになっている。ソレノイドバルブ５０は変速
比制御装置（図示せず）からのＯＮ、ＯＦＦ信号により
進退動作するニードル５１を有しており、このニードル
５１はライン圧が作用する油路４５の途中に設けた開口
４６を開閉し、油圧ピストン４０の右側の室４４への油
圧を制御する。FIG. 2 shows the structure of the actuator 25, in which 40 is a hydraulic piston and 50 is a solenoid valve. An operating rod 41 is integrally connected to the hydraulic piston 40, and the tip of this operating rod 41 is connected to the control valve 20.
is in contact with the shaft 24 of. A spring 43 is housed in a chamber 42 on the left side of the hydraulic piston 40, and this spring 43 always urges the hydraulic piston 40 to the right. Further, an oil passage 45 is provided in the chamber 44 on the right side of the hydraulic piston 40.
are connected to each other, and line pressure is applied via this oil passage 45. The solenoid valve 50 has a needle 51 that moves forward and backward in response to ON and OFF signals from a gear ratio control device (not shown). opens and closes to control the hydraulic pressure to the chamber 44 on the right side of the hydraulic piston 40.
すなわち、ソレノイドバルブ５０をＯＦＦさせると、ニ
ードル５１が開口４６を閉じ、ライン圧が油路４５を介
して油圧ピストン４０の右側の室４４に作用するため、
油圧ピストン４０はスプリング４３に抗して左方へ移動
する。逆に、ソレノイドバルブ５０をＯＮさせると、ニ
ードル５１が開口４６を開き、ライン圧は開口４６から
ドレーンされるため、油圧ピストン４０の右側の室４４
の油圧が下がり、油圧ピストン４０はスプリング４３に
よって右方へ移動する。That is, when the solenoid valve 50 is turned OFF, the needle 51 closes the opening 46 and line pressure acts on the chamber 44 on the right side of the hydraulic piston 40 via the oil passage 45.
The hydraulic piston 40 moves to the left against the spring 43. Conversely, when the solenoid valve 50 is turned ON, the needle 51 opens the opening 46 and the line pressure is drained from the opening 46, so that the pressure is drained from the chamber 44 on the right side of the hydraulic piston 40.
The hydraulic pressure decreases, and the hydraulic piston 40 is moved to the right by the spring 43.
ここで、上記構成からなるトロイダル形無段変速機の全
体の作動について説明する。例えば変速比制御装置によ
りソレノイドバルブ５０をＯＦＦさせると、油圧ピスト
ン４０に追随してコントロールバルブ２０のスリーブ２
２が図中左側へ移動する。これによりコントロールバル
ブ２ｏのポート３０と３３とが連通し、ライン圧は油路
３４を介して左上部と右下部のシリンダ室７，１ｏとに
供給されるとともに、右上部と左下部のシリンダ室９，
８と油路３２を介して連通したポート３１は、スプール
２３の軸心に設けた孔２３ａを介してドレーンされる。Here, the overall operation of the toroidal continuously variable transmission having the above configuration will be explained. For example, when the solenoid valve 50 is turned OFF by the gear ratio control device, the sleeve 2 of the control valve 20 follows the hydraulic piston 40.
2 moves to the left in the figure. As a result, the ports 30 and 33 of the control valve 2o are communicated, and line pressure is supplied to the upper left and lower right cylinder chambers 7 and 1o via the oil passage 34, and the upper right and lower left cylinder chambers. 9,
The port 31 that communicates with the spool 8 through the oil passage 32 is drained through a hole 23 a provided in the axis of the spool 23 .
したがって、左上部と右下部のシリンダ室７．１０の油
圧が高くなり、左側の支持体６は下方へ、右側の支持体
６は上方へそれぞれ移動する。これに伴ってパワーロー
ラ４に加わる接線方向の力の向きが変わるので、左側の
パワーローラ４と支持体６とは右回り方向に回動し、右
側のパワーローラ４と支持体６とは左回り方向に回動す
る。すなわち、トロイダル変速部１は増速側へ移行する
。そして、上記右側の支持体６と一体に回動するブリシ
スカム２７は左回り方向に回動し、ベルクランク２６を
介してスプール２３をポート３３が閉じられるまで左方
へ押す。上記のようにしてトロイダル変速ｇＩＳ １は
所望の変速比まで制御され、かつこの変速比で維持され
る。Therefore, the oil pressure in the upper left and lower right cylinder chambers 7.10 increases, and the left support 6 moves downward and the right support 6 moves upward. Along with this, the direction of the tangential force applied to the power roller 4 changes, so the left power roller 4 and support 6 rotate clockwise, and the right power roller 4 and support 6 rotate to the left. Rotate in the rotational direction. That is, the toroidal transmission section 1 shifts to the speed increasing side. The brisis cam 27, which rotates together with the right support 6, rotates counterclockwise and pushes the spool 23 to the left via the bell crank 26 until the port 33 is closed. As described above, the toroidal gear change gIS1 is controlled to a desired gear ratio and maintained at this gear ratio.
なお、上記実施例では、コントロールバルブ２０のスリ
ーブ２２を変速比制御装置のアクチュエータ２５によっ
て作動させ、スプール２３をブリシスカム２７に従動さ
せるようにしたが、これとは逆に、スプール２３を変速
比制御装置の７クチユエータ２５によって作動させ、ス
リーブ２２をブリシスカム２７に従動させてもよい。In the above embodiment, the sleeve 22 of the control valve 20 is actuated by the actuator 25 of the gear ratio control device, and the spool 23 is driven by the brisis cam 27. However, on the contrary, the spool 23 is actuated by the actuator 25 of the gear ratio control device. It may be actuated by the device's 7 actuator 25, causing the sleeve 22 to follow the brisis cam 27.
さらに、本発明では、コントロールバルブ２０をバルブ
ボデー２１とスリーブ２２とスプール２３との３層構造
としたものに限らず、前述の特開昭５８−５４２６２号
公報に記載のように、支持柱に挿通されたバルブボデー
と、このバルブボデー内を摺動自在なスプールとの２層
構造としてもよく、いずれにしても２個の可動部材を有
し、これら可動部材の一方をアクチュエータ２５で作動
させるものであればよい。Furthermore, in the present invention, the control valve 20 is not limited to having a three-layer structure of the valve body 21, the sleeve 22, and the spool 23. It may have a two-layer structure consisting of an inserted valve body and a spool that is slidable inside the valve body, and in any case, it has two movable members, and one of these movable members is actuated by the actuator 25. It is fine as long as it is something.
発明の効果
以上の説明で明らかなように、本発明によればコントロ
ールバルブの可動部材の一方を動作させるアクチュエー
タを、油圧ピストンとスプリングとソレノイドバルブと
で構成したので、極めて構成が簡単になるとともに、変
速比制御装置はソレノイドバルブにＯＮまたはＯＦＦ信
号を送るだけで済み、制御が簡単となる。また、アクチ
ュエータの基準位置は油圧ピストンの端面と両側の室の
壁面とで容易に決定でき、基準位置認識手段を設ける必
要がない。さらに、アクチュエータの動力源として油圧
を用いているので、ステッパモータのように電圧変動等
によって悪影響を受けるといった問題もない。Effects of the Invention As is clear from the above explanation, according to the present invention, the actuator that operates one of the movable members of the control valve is composed of a hydraulic piston, a spring, and a solenoid valve. The gear ratio control device only needs to send an ON or OFF signal to the solenoid valve, which simplifies control. Further, the reference position of the actuator can be easily determined from the end face of the hydraulic piston and the wall surfaces of the chambers on both sides, and there is no need to provide reference position recognition means. Furthermore, since hydraulic pressure is used as the power source for the actuator, there is no problem of the actuator being adversely affected by voltage fluctuations, unlike stepper motors.
第１図は本発明にかかるトロイダル形無段変速機の断面
図、第２図は変速比制御装置のアクチュエータの構成図
である。
■・・・トロイダル変速部、２・・・入力ディスク、３
・・・ハウジング、４・・・パワーローラ、６・・・支
持体、７〜１０・・・シリンダ室、２０・・・コントロ
ールバルブ、２１°°°バルブボデー、２２・・・スリ
ーブ、２３・・・スプール、２５・・・アクチュエータ
、２７・・・プリシスカム、４０・・・油圧ピストン、
４２゜４４・・・室、４３・・・スプリング、５０・・
・ソレノイドバルブ。FIG. 1 is a sectional view of a toroidal continuously variable transmission according to the present invention, and FIG. 2 is a configuration diagram of an actuator of a speed ratio control device. ■...Toroidal transmission section, 2...Input disk, 3
... Housing, 4... Power roller, 6... Support body, 7-10... Cylinder chamber, 20... Control valve, 21°°° Valve body, 22... Sleeve, 23. ... Spool, 25... Actuator, 27... Presiscam, 40... Hydraulic piston,
42°44...chamber, 43...spring, 50...
・Solenoid valve.
Claims (1)
で配置されたパワーローラと、パワーローラを回転自在
に支持し、軸方向に可動でかつ軸回りに回動可能な支持
体と、支持体の両端部に連設され、支持体を軸方向に作
動させるためのシリンダ室と、２つの可動部材を有し、
これら可動部材を相互に動作させることによりシリンダ
室への油圧を制御するコントロールバルブと、上記可動
部材の一方を動作させる変速比制御装置のアクチュエー
タと、上記支持体と一体に回動し、上記可動部材の他方
を従動せしめるプリシスカムとを備えたトロイダル形無
段変速機において、上記アクチュエータを、油圧ピスト
ンと、該油圧ピストンの片側の室に収容され、油圧ピス
トンを他方側へ付勢するスプリングと、変速比制御装置
からの信号により油圧ピストンの他方側の室への油圧を
制御するソレノイドバルブとで構成したことを特徴とす
るトロイダル形無段変速機。(1) An input/output disk, a power roller placed in pressure contact between the input/output disks, a support that rotatably supports the power roller, is movable in the axial direction and rotatable around the axis, and a support It has a cylinder chamber connected to both ends of the body and for operating the support body in the axial direction, and two movable members,
A control valve that controls hydraulic pressure to the cylinder chamber by mutually operating these movable members, an actuator of a gear ratio control device that operates one of the movable members, and an actuator that rotates integrally with the support body to move the movable member. In a toroidal continuously variable transmission equipped with a precise cam that drives the other of the members, the actuator includes a hydraulic piston, a spring housed in a chamber on one side of the hydraulic piston, and biasing the hydraulic piston toward the other side. A toroidal continuously variable transmission characterized by comprising a solenoid valve that controls hydraulic pressure to a chamber on the other side of a hydraulic piston in accordance with a signal from a speed ratio control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25000084A JPS61127965A (en) | 1984-11-27 | 1984-11-27 | Troidal type continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25000084A JPS61127965A (en) | 1984-11-27 | 1984-11-27 | Troidal type continuously variable transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61127965A true JPS61127965A (en) | 1986-06-16 |
Family
ID=17201350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25000084A Pending JPS61127965A (en) | 1984-11-27 | 1984-11-27 | Troidal type continuously variable transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61127965A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960004A (en) * | 1988-05-17 | 1990-10-02 | Nissan Motor Co., Ltd. | Continuously variable traction roller transmission |
| EP0728960A2 (en) * | 1995-02-27 | 1996-08-28 | Isuzu Motors Limited | Continuously variable toroidal transmission |
| US5681236A (en) * | 1995-02-27 | 1997-10-28 | Isuzu Motors Limited | Toroidal continuous variable transmission |
-
1984
- 1984-11-27 JP JP25000084A patent/JPS61127965A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960004A (en) * | 1988-05-17 | 1990-10-02 | Nissan Motor Co., Ltd. | Continuously variable traction roller transmission |
| EP0728960A2 (en) * | 1995-02-27 | 1996-08-28 | Isuzu Motors Limited | Continuously variable toroidal transmission |
| EP0728960A3 (en) * | 1995-02-27 | 1997-05-14 | Isuzu Motors Ltd | Continuously variable toroidal transmission |
| US5681236A (en) * | 1995-02-27 | 1997-10-28 | Isuzu Motors Limited | Toroidal continuous variable transmission |
| US5711741A (en) * | 1995-02-27 | 1998-01-27 | Isuzu Motors Limited | Fail safe for toroidal continuous variable transmission |
| US5842945A (en) * | 1995-02-27 | 1998-12-01 | Isuzu Motors Limited | Toroidal continuous variable transmission with a limited slip differential between the output toroid disks |
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