JPH05296319A - Number-of-rotation detector for automatic transmission - Google Patents
Number-of-rotation detector for automatic transmissionInfo
- Publication number
- JPH05296319A JPH05296319A JP12263292A JP12263292A JPH05296319A JP H05296319 A JPH05296319 A JP H05296319A JP 12263292 A JP12263292 A JP 12263292A JP 12263292 A JP12263292 A JP 12263292A JP H05296319 A JPH05296319 A JP H05296319A
- Authority
- JP
- Japan
- Prior art keywords
- portions
- bottomed cylindrical
- projection portions
- rotation
- clutch
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、車両の自動変速機に
おいて変速の進行状態をモニターするために所定の回転
部材の回転数を検出する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the number of rotations of a predetermined rotary member in order to monitor the progress of gear shifting in an automatic transmission of a vehicle.
【０００２】[0002]
【従来の技術】周知のように車両用の自動変速機では、
クラッチやブレーキなどの摩擦係合装置の係合・解放状
態を変えることによって変速を実行しており、その際の
係合・解放のタイミングの良否によって出力トルクの変
化に影響が生じ、変速ショックが悪化することがある。
そのため最近では、変速の進行状態を所定の回転部材の
回転数に基づいて判断し、その判断結果によって摩擦係
合装置における油圧を制御することにより変速ショック
の悪化を防止している。As is well known, in automatic transmissions for vehicles,
Gear shifting is performed by changing the engagement / disengagement state of friction engagement devices such as clutches and brakes, and the change in output torque is affected by the quality of the engagement / disengagement timing at that time, resulting in gear shift shock. It may get worse.
Therefore, recently, the progress state of gear shift is judged based on the rotation speed of a predetermined rotary member, and the hydraulic shock in the friction engagement device is controlled according to the judgment result to prevent the shift shock from becoming worse.
【０００３】例えば図３は前進３段の変速を行う３速変
速部１とオーバードライブ部（Ｏ／Ｄ部）２とを備えた
前進４段の変速の可能な自動変速機であり、特願平３−
５５８６９号の発明では、その第２クラッチＣ2 のドラ
ムの回転数を検出するよう構成している。For example, FIG. 3 shows an automatic transmission capable of four forward gear shifts, which is provided with a third speed gear shift portion 1 for performing three forward gear shifts and an overdrive portion (O / D portion) 2. Flat 3-
In the invention of No. 55869, the rotational speed of the drum of the second clutch C2 is detected.
【０００４】すなわち図３に示す自動変速機における３
速変速部１は、第１遊星歯車機構３と第２遊星歯車機構
４とを備え、それぞれのサンギヤ５，６がサンギヤ軸７
によって連結されるとともに、そのサンギヤ軸７が第２
クラッチＣ2 を介して入力軸８に連結され、その第２ク
ラッチＣ2 のクラッチドラムの外周にバンドブレーキで
ある第１ブレーキＢ1 が設けられている。また第１遊星
歯車機構３のリングギヤ９と入力軸８との間には第１ク
ラッチＣ1 が設けられている。さらにサンギヤ軸７とケ
ーシング１０との間には、互いに直列に配列された第１
一方向クラッチＦ1 と第２ブレーキＢ2 とが配置されて
いる。第１遊星歯車機構３のキャリヤ１１と第２遊星歯
車機構４のリングギヤ１２とが一体となって回転するよ
う連結され、その第２遊星歯車機構４のキャリヤ１３と
ケーシング１０との間には、互いに並列の関係に配列さ
れた第２一方向クラッチＦ2 と第３ブレーキＢ3 とが設
けられている。That is, 3 in the automatic transmission shown in FIG.
The high speed transmission unit 1 includes a first planetary gear mechanism 3 and a second planetary gear mechanism 4, and the sun gears 5 and 6 of the first planetary gear mechanism 3 and the sun planetary gear mechanism 7 are respectively arranged.
And the sun gear shaft 7 is connected to the second
A first brake B1 which is a band brake is provided on the outer periphery of the clutch drum of the second clutch C2 which is connected to the input shaft 8 via the clutch C2. A first clutch C1 is provided between the ring gear 9 of the first planetary gear mechanism 3 and the input shaft 8. Further, between the sun gear shaft 7 and the casing 10, the first gears arranged in series with each other are provided.
A one-way clutch F1 and a second brake B2 are arranged. The carrier 11 of the first planetary gear mechanism 3 and the ring gear 12 of the second planetary gear mechanism 4 are connected so as to rotate integrally, and between the carrier 13 of the second planetary gear mechanism 4 and the casing 10, A second one-way clutch F2 and a third brake B3 are provided which are arranged in parallel with each other.
【０００５】Ｏ／Ｄ部２は一組の遊星歯車機構１４を備
え、そのキャリヤ１５が前記第１遊星歯車機構３のキャ
リヤ１１および第２遊星歯車機構４のリングギヤ１２に
連結され、またリングギヤ１６が出力部材であるカウン
タドライブギヤ１７に連結されている。そしてサンギヤ
１８とキャリヤ１５との間には、互いに並列の関係にあ
る一方向クラッチＦ0 とクラッチＣ0 とが配置され、さ
らにそのサンギヤ１８とケーシング１０との間にブレー
キＢ0 が設けられている。The O / D section 2 is provided with a set of planetary gear mechanisms 14, the carrier 15 of which is connected to the carrier 11 of the first planetary gear mechanism 3 and the ring gear 12 of the second planetary gear mechanism 4 and also the ring gear 16. Is connected to the counter drive gear 17, which is an output member. A one-way clutch F0 and a clutch C0 which are in parallel with each other are arranged between the sun gear 18 and the carrier 15, and a brake B0 is provided between the sun gear 18 and the casing 10.
【０００６】そして図４に断面を示すように、回転自在
に支持される第２クラッチＣ2 のドラムと、サンギヤ軸
７にスプライン係合されたサンギヤドラム１９とを、そ
れぞれの爪部を互いに係合させて一体に組付けて第２ク
ラッチドラムとするとともに、サンギヤドラム１９に複
数の角孔２１を、周方向に所定のピッチで形成し、この
角孔２１を検知するように電磁ピックアップが設けられ
ている。したがって、第２クラッチドラムが回転する
と、電磁ピックアップの前を、角孔２１が形成されてい
る部分と形成されていない部分とが交互に通過すること
によって、回転数が検出される。As shown in the sectional view of FIG. 4, the drum of the second clutch C2, which is rotatably supported, and the sun gear drum 19, which is spline-engaged with the sun gear shaft 7, are engaged with each other by their claws. The sun gear drum 19 is formed with a plurality of square holes 21 at a predetermined pitch in the circumferential direction, and an electromagnetic pickup is provided to detect the square holes 21. ing. Therefore, when the second clutch drum rotates, the number of rotations is detected by alternately passing the portion in which the square hole 21 is formed and the portion in which the square hole 21 is not formed in front of the electromagnetic pickup.
【０００７】[0007]
【発明が解決しようとする課題】ところで自動変速機の
構成部材のうち主に動力を伝達する部材は、強度や加工
性あるいは価格など点で軟鋼などによって形成するのが
一般的であり、そのため回転数検出装置として電磁ピッ
クアップを使用することができると同時に、最も外周側
に位置する回転体の回転数を検出することになり、その
ため上記従来の装置では第２クラッチＣ2 のクラッチド
ラムの回転数を検出することとしているのである。しか
しながら、この場合に第２速時には、第２クラッチドラ
ムが停止するが、内側の第１クラッチＣ1 ドラムは回転
し続けるため、電磁ピックアップの真下にサンギヤドラ
ム１９の角孔２１がある状態で第２クラッチドラムが停
止すると、第２クラッチドラムの下側で回転する第１ク
ラッチＣ1 ドラムの凹凸部を、被検知部と間違えて角孔
２１を経由して電磁ピックアップが誤検出してしまい、
正確な回転数を検出できず、その結果、検出不良による
変速ショックが生じるという問題があった。By the way, among the constituent members of the automatic transmission, the member that mainly transmits power is generally formed of mild steel or the like in terms of strength, workability, or price, and therefore, rotation An electromagnetic pickup can be used as the number detecting device, and at the same time, the number of rotations of the rotor located on the outermost peripheral side is detected. Therefore, in the above conventional device, the number of rotations of the clutch drum of the second clutch C2 is detected. It is supposed to be detected. However, in this case, at the second speed, the second clutch drum is stopped, but the inner first clutch C1 drum continues to rotate, so that the second hole is formed with the square hole 21 of the sun gear drum 19 directly below the electromagnetic pickup. When the clutch drum stops, the electromagnetic pickup erroneously detects the uneven portion of the first clutch C1 drum, which rotates below the second clutch drum, as a detected portion via the square hole 21,
There is a problem that an accurate rotation speed cannot be detected, and as a result, a shift shock occurs due to a detection error.
【０００８】この発明は上記の事情に鑑みてなされたも
ので、正確な回転数を検出することのできる自動変速機
における回転数検出装置を提供することを目的とするも
のである。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a rotation speed detecting device in an automatic transmission which can accurately detect the rotation speed.
【０００９】[0009]
【課題を解決するための手段】上記の課題を解決する手
段としてこの発明の自動変速機における回転数検出装置
は、それぞれの開口側端部を互いに係合させて一体に回
転するように組付けられ、その内側に摩擦係合手段が収
容される一対の有底円筒体のうち、一方の有底円筒体の
開口端側に、部分的に内径を拡大して外周側に所定量突
出した凸部を周方向に一定ピッチで複数形成し、他方の
有底円筒体の開口端側に、軸線と平行な方向に突出する
複数の爪部を、前記凸部の内側に内周方向において係合
するよう凸部と同一ピッチに形成し、磁界の変化によっ
て信号を出力する電磁ピックアップを、前記凸部に対向
させて前記有底円筒体の外周側に配設したことを特徴と
している。As a means for solving the above-mentioned problems, a rotation speed detecting device in an automatic transmission according to the present invention is assembled such that respective opening side end portions are engaged with each other so as to rotate integrally. Of the pair of bottomed cylindrical bodies in which the frictional engagement means is housed, the inner diameter is partially enlarged toward the open end side of one of the bottomed cylindrical bodies, and a protrusion protruding toward the outer peripheral side by a predetermined amount. A plurality of portions are formed at a constant pitch in the circumferential direction, and a plurality of claw portions projecting in the direction parallel to the axis line are engaged with the inside of the convex portion in the inner circumferential direction on the opening end side of the other bottomed cylindrical body. Thus, an electromagnetic pickup that is formed at the same pitch as the convex portion and outputs a signal according to a change in the magnetic field is arranged on the outer peripheral side of the bottomed cylindrical body so as to face the convex portion.
【００１０】[0010]
【作用】上記のように構成されるこの発明は、一方の有
底円筒体の開口端側の外周に、その内径を拡大するよう
にして複数の凸部を一定のピッチで形成するとともに、
各凸部の内側に、他方の有底円筒体の爪部をそれぞれ係
合させて一体に回転するように組付けることができると
ともに、係合させた前記凸部を、被検出部として電磁ピ
ックアップで検出するため、被検出部として角孔等を別
途設けなくても、有底円筒体の回転を正確に検出するこ
とができる。According to the present invention constituted as described above, a plurality of convex portions are formed at a constant pitch on the outer periphery of the open end side of one bottomed cylindrical body so that the inner diameter is enlarged,
The claws of the other bottomed cylindrical body can be engaged with the inside of each convex portion so as to rotate integrally, and the engaged convex portion is used as a detected portion as an electromagnetic pickup. Therefore, the rotation of the bottomed cylindrical body can be accurately detected without separately providing a square hole or the like as the detected portion.
【００１１】[0011]
【実施例】つぎに、この発明の実施例を図面を参照して
説明すると、図１はこの発明の一実施例を示す自動変速
機の部分断面図であり、また図２はその第２クラッチド
ラムの分解斜視図であって、ここに示す自動変速機は前
述した図３に示す歯車列を備えている。すなわち入力軸
３０は、トルクコンバータ３１のタービンランナー３２
に連結されて、常時、回転駆動されており、その入力軸
３０の先端部には、第１クラッチＣ1 のクラッチドラム
３３と第２クラッチＣ2 のクラッチハブ３４とが一体的
に取り付けられている。そのクラッチドラム３３の内周
部に多数の摩擦板３５がスプライン嵌合するとともに、
このクラッチドラム３３の外側には、第２クラッチＣ2
のクラッチドラム（以下、仮に第２クラッチドラムと記
す）３７が同心円上に配置されている。この第２クラッ
チドラム３７は、図２に示すように互いの端部を突き合
わせて連結された一対の有底円筒状の分割部３７ａ，３
７ｂによって構成されている。1 is a partial sectional view of an automatic transmission showing one embodiment of the present invention, and FIG. 2 is a second clutch thereof. FIG. 4 is an exploded perspective view of the drum, and the automatic transmission shown here includes the gear train shown in FIG. 3 described above. That is, the input shaft 30 is the turbine runner 32 of the torque converter 31.
The clutch drum 33 of the first clutch C1 and the clutch hub 34 of the second clutch C2 are integrally attached to the tip of the input shaft 30 of the clutch drum 33. A large number of friction plates 35 are spline-fitted to the inner peripheral portion of the clutch drum 33, and
The second clutch C2 is provided outside the clutch drum 33.
The clutch drum (hereinafter, temporarily referred to as the second clutch drum) 37 of No. 1 is arranged concentrically. As shown in FIG. 2, the second clutch drum 37 has a pair of bottomed cylindrical split portions 37a, 3 whose end portions are abutted and connected to each other.
7b.
【００１２】これらの分割部３７ａ，３７ｂのうち、一
方の分割部３７ａは、ポンプカバー３９の内周部に突設
したボス部４０に回転自在に嵌合してポンプカバー３９
によって保持されており、有底円筒状の開口端側を、そ
の内径を部分的に拡大するように外周側へ所定量突出さ
せて、凸部３６を周方向に一定ピッチでパルスギヤ状に
形成されている。また他方の分割部３７ｂは、分割部３
７ａは、開口端を軸線方向に突出させて係合爪３８が、
前記各凸部３６の内側にそれぞれ係合するよう、凸部３
６と同一のピッチで所定の幅と長さに形成されている。
前記凸部３６は、その内側に形成された凹部が係合爪３
８用の係合部となり、係合爪３８と円周方向に隙間なく
密着係合するとともに、回転することによって磁界を変
化させて、電磁ピックアップに検出させる被検出体を兼
ねている。Of the divided portions 37a and 37b, one divided portion 37a is rotatably fitted to a boss portion 40 projecting from the inner peripheral portion of the pump cover 39 so as to be rotatable.
The open end side of the bottomed cylindrical shape is projected to the outer peripheral side by a predetermined amount so as to partially enlarge the inner diameter, and the convex portions 36 are formed in a pulse gear shape at a constant pitch in the circumferential direction. ing. The other division part 37b is the division part 3b.
7a has an opening end protruding in the axial direction so that the engaging claw 38 is
The protrusions 3 are engaged with the insides of the protrusions 36, respectively.
6 are formed with the same pitch and a predetermined width and length.
The convex portion 36 has a concave portion formed on the inner side thereof for engaging the claw 3.
It serves as an engaging portion for 8 and tightly engages with the engaging claw 38 in the circumferential direction without a gap, and also serves as a detected object which is rotated to change the magnetic field and detected by the electromagnetic pickup.
【００１３】そして、前記両分割部３７ａ，３７ｂは、
内側に摩擦係合装置等の所定の回転要素を収容した後、
一方の分割部３７ａの凸部３６の内側に、他方の分割部
３７ｂの係合爪３８をそれぞれ係合させて一体に組付け
られる。なお、一方の分割部３７ａのうち第２クラッチ
Ｃ2 のクラッチハブ３４に半径方向で対向する位置には
複数の摩擦板４４がスプライン嵌合し、またクラッチハ
ブ３４にも同様に摩擦板４４がスプライン嵌合してい
る。さらにその分割部３７ａの外周側には第１ブレーキ
Ｂ1 のブレーキバンド４５が配置されている。Then, the two divided parts 37a and 37b are
After accommodating a predetermined rotating element such as a friction engagement device inside,
The engaging claws 38 of the other divided portion 37b are engaged with the inside of the convex portion 36 of the one divided portion 37a to be integrally assembled. It should be noted that a plurality of friction plates 44 are spline-fitted to one of the divided portions 37a at positions radially opposed to the clutch hub 34 of the second clutch C2, and the friction plates 44 are similarly splined to the clutch hub 34 as well. It is fitted. Further, a brake band 45 of the first brake B1 is arranged on the outer peripheral side of the divided portion 37a.
【００１４】上述した第２クラッチドラム３７の外周側
における凸部３６に対応する箇所に、磁界の変化によっ
て信号を出力する電磁ピックアップ４６がケーシング４
７に固定されて配設されている。An electromagnetic pickup 46, which outputs a signal in response to a change in magnetic field, is provided in the casing 4 at a location corresponding to the convex portion 36 on the outer peripheral side of the second clutch drum 37 described above.
It is fixedly arranged at 7.
【００１５】上記の自動変速機では、トルクコンバータ
３１が動作していれば、第２クラッチドラム３７の回転
が止っても、入力軸３０と共に第１クラッチＣ1 のクラ
ッチドラム３３が回転し続けるが、第２クラッチドラム
３７によって外周側を覆われているため、前記ドラム３
３を被検出部として誤検出することがない。したがって
第２クラッチドラム３７が回転してその凸部３６が電磁
ピックアップ４６の先端側を通過することにより磁界が
変化し、電磁ピックアップ４６が第２クラッチドラム３
７の回転数を検出する。In the above automatic transmission, if the torque converter 31 operates, the clutch drum 33 of the first clutch C1 continues to rotate together with the input shaft 30 even if the rotation of the second clutch drum 37 stops. Since the outer peripheral side is covered by the second clutch drum 37, the drum 3
3 will not be erroneously detected as the detected portion. Therefore, the second clutch drum 37 rotates and the convex portion 36 passes the tip end side of the electromagnetic pickup 46, whereby the magnetic field is changed, and the electromagnetic pickup 46 is moved by the second clutch drum 3.
The rotation speed of 7 is detected.
【００１６】なお、上記の実施例では、図３に示す歯車
列を備えた自動変速機を例に採って説明したが、この発
明は上記の実施例に限定されないのであって、他の歯車
列を備えた自動変速機にも適用することができる。In the above embodiment, the automatic transmission provided with the gear train shown in FIG. 3 has been described as an example, but the present invention is not limited to the above embodiment, and other gear trains are possible. It can also be applied to an automatic transmission equipped with.
【００１７】[0017]
【発明の効果】以上説明したようにこの発明によれば、
最外周の回転体の外周に一定のピッチで形成された凸部
が、一対の有底円筒体の係合部と、電磁ピックアップの
被検出部とを兼ねているため、角孔やパルスギヤ等の被
検出体を別途設ける必要がなく、また誤検出も防止され
て正確な回転を検出できるので、円滑な自動変速が可能
となる。As described above, according to the present invention,
Since the convex portions formed at a constant pitch on the outer circumference of the outermost rotating body also serve as the engaging portion of the pair of bottomed cylindrical bodies and the detected portion of the electromagnetic pickup, such as a square hole and a pulse gear. Since it is not necessary to separately provide an object to be detected, erroneous detection is prevented, and accurate rotation can be detected, smooth automatic gear shifting is possible.
【図１】この発明の一実施例を示す部分断面図である。FIG. 1 is a partial sectional view showing an embodiment of the present invention.
【図２】そのクラッチドラムの分解斜視図である。FIG. 2 is an exploded perspective view of the clutch drum.
【図３】自動変速機の歯車列の一例を示すスケルトン図
である。FIG. 3 is a skeleton diagram showing an example of a gear train of an automatic transmission.
【図４】従来のクラッチドラムの断面図である。FIG. 4 is a sectional view of a conventional clutch drum.
３０ 入力軸 ３３ 第１クラッチドラム ３６ 凸部 ３７ 第２クラッチドラム ３７ａ 分割部 ３７ｂ 分割部 ３８ 爪部 ４６ 電磁ピックアップ 30 Input Shaft 33 First Clutch Drum 36 Convex Part 37 Second Clutch Drum 37a Dividing Part 37b Dividing Part 38 Claw Part 46 Electromagnetic Pickup
───────────────────────────────────────────────────── フロントページの続き (72)発明者 各務 道孝 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michitaka Michitaka Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd.
Claims (1)
て一体に回転するように組付けられ、その内側に摩擦係
合手段が収容される一対の有底円筒体のうち、一方の有
底円筒体の開口端側に、部分的に内径を拡大して外周側
に所定量突出した凸部を周方向に一定ピッチで複数形成
し、他方の有底円筒体の開口端側に、軸線と平行な方向
に突出する複数の爪部を、前記凸部の内側に内周方向に
おいて係合するよう凸部と同一ピッチに形成し、磁界の
変化によって信号を出力する電磁ピックアップを、前記
凸部に対向させて前記有底円筒体の外周側に配設したこ
とを特徴とする自動変速機における回転数検出装置。1. A pair of bottomed cylindrical bodies, which are assembled so that their opening-side end portions are engaged with each other so as to rotate integrally, and in which frictional engagement means are housed, are provided. On the opening end side of the bottom cylindrical body, a plurality of convex parts that partially expand the inner diameter and project toward the outer peripheral side by a predetermined amount are formed at a constant pitch in the circumferential direction, and on the opening end side of the other bottomed cylindrical body, the axis line A plurality of claws protruding in a direction parallel to the projection are formed at the same pitch as the projections so as to engage with the inside of the projections in the inner circumferential direction, and A rotational speed detection device in an automatic transmission, characterized in that the rotational speed detection device is disposed on the outer peripheral side of the bottomed cylindrical body so as to face the section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12263292A JP3047617B2 (en) | 1992-04-16 | 1992-04-16 | Rotation speed detection device for automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12263292A JP3047617B2 (en) | 1992-04-16 | 1992-04-16 | Rotation speed detection device for automatic transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05296319A true JPH05296319A (en) | 1993-11-09 |
| JP3047617B2 JP3047617B2 (en) | 2000-05-29 |
Family
ID=14840779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12263292A Expired - Fee Related JP3047617B2 (en) | 1992-04-16 | 1992-04-16 | Rotation speed detection device for automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3047617B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0747709A1 (en) * | 1995-06-06 | 1996-12-11 | Ssi Technologies, Inc. | Apparatus for sensing the speed of a rotating element |
| JP2008038939A (en) * | 2006-08-02 | 2008-02-21 | Mazda Motor Corp | Automatic transmission |
-
1992
- 1992-04-16 JP JP12263292A patent/JP3047617B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0747709A1 (en) * | 1995-06-06 | 1996-12-11 | Ssi Technologies, Inc. | Apparatus for sensing the speed of a rotating element |
| US5825176A (en) * | 1995-06-06 | 1998-10-20 | Ssi Technologies, Inc. | Sensor mounted adjacent an outer member for sensing the rotational speed of a inner member |
| JP2008038939A (en) * | 2006-08-02 | 2008-02-21 | Mazda Motor Corp | Automatic transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3047617B2 (en) | 2000-05-29 |
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