JPH0517499Y2 - - Google Patents
Info
- Publication number
- JPH0517499Y2 JPH0517499Y2 JP2308089U JP2308089U JPH0517499Y2 JP H0517499 Y2 JPH0517499 Y2 JP H0517499Y2 JP 2308089 U JP2308089 U JP 2308089U JP 2308089 U JP2308089 U JP 2308089U JP H0517499 Y2 JPH0517499 Y2 JP H0517499Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- switching valve
- operating state
- oil
- reverse
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Transmission Device (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は前進走行中に誤つて後進段を選択して
も、後進段の達成を不可とする自動変速機の安全
装置に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a safety device for an automatic transmission that makes it impossible to achieve the reverse gear even if the reverse gear is selected by mistake during forward travel.
〈従来の技術〉
一般に乗用車に搭載される自動変速機は、トル
クコンバータ、複数の摩擦要素を組み合せて前後
進の変速段を達成するように構成された遊星歯車
式変速機構及び上記摩擦要素に油圧を給排する油
圧制御装置等から構成されている。上記油圧制御
装置は通常シフトレバーを操作することにより、
運転状態切換弁１をＤ，Ｌレンジの前進位置、Ｒ
レンジの後進位置、Ｎレンジのニユートラル位置
又はＰレンジのパーキング位置に切り換えて、上
記複数の摩擦要素に油圧を給排するよに構成した
ものである。<Prior Art> Generally, an automatic transmission installed in a passenger car includes a torque converter, a planetary gear type transmission mechanism configured to combine a plurality of friction elements to achieve forward and backward gears, and a hydraulic system for the friction elements. It consists of a hydraulic control device that supplies and discharges water. The above hydraulic control device usually operates by operating the shift lever.
Set the operating state switching valve 1 to the forward position of the D and L ranges, and the R range.
The hydraulic pressure is supplied to and discharged from the plurality of friction elements by switching the range to a reverse position, an N range to a neutral position, or a P range to a parking position.
〈考案が解決しようとする課題〉
このような構成の自動変速機では、第１図に示
すように運転状態切換弁１をＲレンジに切換る
と、矢印に示すように油圧源から圧油が上記弁１
内を通り、油路２，３を通つて後退用摩擦要素で
あるフロントクラツチ４、ローリバースブレーキ
５に供給され、直ちに後進段が達成されることと
なる。従つて、このような自動変速機を搭載した
車輛において、前進走行中に誤つてシフトレバー
を操作して運転状態切換弁１をＲレンジに切換え
た場合には、急制動あるいはエンストを起こして
危険となる不都合があつた。<Problem to be solved by the invention> In an automatic transmission having such a configuration, when the operating state switching valve 1 is switched to the R range as shown in Fig. 1, pressure oil is released from the hydraulic source as shown by the arrow. Above valve 1
The oil is supplied to the front clutch 4 and low reverse brake 5, which are friction elements for reversing, through oil passages 2 and 3, and the reverse gear is immediately achieved. Therefore, in a vehicle equipped with such an automatic transmission, if you accidentally operate the shift lever and switch the driving state selector valve 1 to the R range while driving forward, sudden braking or engine stall may occur, which can be dangerous. There was an inconvenience.
本考案は、上記従来技術に鑑み、前進走行中に
誤つて運転状態切換弁を後進位置に切換えても、
後進段を達成できないようにした自動変速機の安
全装置を提供することを目的とする。 In view of the above-mentioned conventional technology, the present invention has been developed so that even if the driving state switching valve is accidentally switched to the reverse position while driving forward,
An object of the present invention is to provide a safety device for an automatic transmission that prevents a reverse gear from being achieved.
〈課題を解決するための手段〉
斯かる目的を達成する本考案の自動変速機の安
全装置にかかる構成は変速機を後進の駆動状態に
する後進用摩擦要素へ油圧源からの圧油を供給す
るための第１の位置と上記変速機を上記後進以外
の状態とするための第２の位置とに切換可能な運
転状態切換弁、上記油圧源と上記後進用摩擦要素
とを連通する油路に配設され同後進用摩擦要素へ
油圧を供給する油圧供給位置と同後進用摩擦要素
への油圧を排出する油圧排出位置とに切換可能な
油圧切換弁と、同油圧切換弁を上記油圧供給位置
と上記油圧排出位置との間で切換える電磁弁と、
車両の運転状態に応じて同電磁弁を作動させるコ
ントローラとを備えた自動変速機において、車速
を検出する車速センサと、エンジンの回転速度を
検出する回転数センサと、上記運転状態切換弁が
上記第１の位置に設定されていることを検出する
位置センサとを設け、車速及びエンジン回転数の
少なくとも何れか一方が所定値以上で上記運転状
態切換弁が上記第１の位置へ切換えられたときに
上記電磁弁を作動させて上記油圧切換弁を上記油
圧排出位置に切換ることを特徴とする。<Means for solving the problem> The configuration of the safety device of the automatic transmission of the present invention that achieves the above purpose is to supply pressurized oil from a hydraulic source to the reverse friction element that puts the transmission in the reverse drive state. an operating state switching valve that is switchable between a first position for placing the transmission in a state other than the reverse and a second position for placing the transmission in a state other than the reverse; an oil passage that communicates the hydraulic pressure source with the reverse friction element; a hydraulic switching valve that is disposed in and can be switched between a hydraulic pressure supply position for supplying hydraulic pressure to the reversing friction element and a hydraulic discharge position for discharging hydraulic pressure to the reversing friction element; a solenoid valve that switches between the position and the hydraulic discharge position;
In an automatic transmission equipped with a controller that operates the solenoid valve according to the operating state of the vehicle, the vehicle speed sensor that detects the vehicle speed, the rotation speed sensor that detects the rotational speed of the engine, and the operating state switching valve are configured as described above. and a position sensor that detects that the valve is set to the first position, and when the operating state switching valve is switched to the first position when at least either the vehicle speed or the engine rotation speed is equal to or higher than a predetermined value. The electromagnetic valve is operated to switch the hydraulic switching valve to the hydraulic discharge position.
〈実施例〉
以下、本考案を車輛に適用した実施例に基づい
て詳細に説明する。<Example> Hereinafter, the present invention will be described in detail based on an example in which the present invention is applied to a vehicle.
第２図に本考案の一実施例を示す。尚、本考案
の特徴は前進用摩擦要素及びこれらの油圧回路と
関連がないので、図中においてこれらを省略する
と共に説明を省く。即ち、同図に示す実施例では
運転状態切換弁１と後退用摩擦要素であるフロン
トクラツチ、ローリバースブレーキ５とが各々油
路２，３にて接続されている。運転状態切換弁１
は図示省略した油圧源に油路６を介して接続され
ており、該油路６には図中矢印の向きの油圧P1
が加わつている。運転状態切換弁１は前進位置
（Ｄレンジ、Ｌレンジ）、後進位置（Ｒレンジ）及
びパーキング位置（Ｐレンジ）等をとり得るスプ
ール弁７を具えており、このスプール弁７にはラ
ンド８，９が形成されている。従つて、運転状態
切換弁１を操作し、同図に示されるようにランド
８，９の間に油路６，２を位置させるとＲレンジ
が得られることとなる。運転状態切換弁１の操作
はシフトレバーにより行うのが一般的であるが、
スプール弁７を図中左右に駆動するサーボモータ
を設け、前後進選択スイツチにより該サーボモー
タを作動させるようにしても良い。 FIG. 2 shows an embodiment of the present invention. Note that the features of the present invention are not related to the forward friction elements and their hydraulic circuits, so they are omitted in the drawings and their explanations will be omitted. That is, in the embodiment shown in the figure, an operating state switching valve 1, a front clutch and a low reverse brake 5, which are reversing friction elements, are connected through oil passages 2 and 3, respectively. Operation status switching valve 1
is connected to a hydraulic power source (not shown) via an oil passage 6, and the oil passage 6 receives a hydraulic pressure P 1 in the direction of the arrow in the figure.
is being added. The operating state switching valve 1 includes a spool valve 7 that can take a forward position (D range, L range), a reverse position (R range), a parking position (P range), etc., and this spool valve 7 has a land 8, 9 is formed. Therefore, by operating the operating state switching valve 1 and positioning the oil passages 6 and 2 between the lands 8 and 9 as shown in the figure, the R range will be obtained. The operating state switching valve 1 is generally operated using a shift lever.
A servo motor may be provided to drive the spool valve 7 left and right in the figure, and the servo motor may be operated by a forward/reverse selection switch.
一方、車速が一定値を超えた時にローリバース
ブレーキ５と運転状態切換弁１と間の油路３から
圧油を排出する油路切換機構が設けられている。
即ち、油路３には油路切換弁１０が介装され、該
油路切換弁１０は円筒孔内を摺動するスプール弁
１１を具えており、該スプール弁１１にはランド
１２，１３が形成されている。上記円筒孔の図中
左側にはランド１２との間にコイルばね１４が設
けられると共に該円筒孔には図中左から順に排油
路２７、油路３，３、排油路１５が開口してい
る。また円筒孔の右端は図示省略した油圧源に油
路１６を介して接続しており、該油路１６には図
中矢印向きの油圧P2が加わつている。この油路
１６には電磁弁１７が設けられており、該油路１
６から圧油を排出して、油圧P2を適当に調圧す
ることができるようになつている。従つて、電磁
弁１７により油圧P2を適当に調圧して、スプー
ル弁１１を摺動させ、ランド１２，１３の間に油
路３，３のみを位置させれば、油路３を通じてロ
ーリバースブレーキ５に圧油を供給できることと
なり（この位置を油圧供給位置とする）、又ラン
ド１２，１３の間に油路３、排油路１５を位置さ
せれば、排油路１５から圧油が排出され（この位
置を油圧排出位置とする）ローリバースブレーキ
５には圧油を供給できないこととなる。 On the other hand, an oil passage switching mechanism is provided that discharges pressure oil from the oil passage 3 between the low reverse brake 5 and the operating state switching valve 1 when the vehicle speed exceeds a certain value.
That is, an oil passage switching valve 10 is interposed in the oil passage 3, and the oil passage switching valve 10 includes a spool valve 11 that slides in a cylindrical hole. It is formed. A coil spring 14 is provided between the cylindrical hole and the land 12 on the left side in the figure, and an oil drain passage 27, oil passages 3, 3, and 15 are opened in the cylindrical hole in order from the left in the figure. ing. The right end of the cylindrical hole is connected to a hydraulic power source (not shown) via an oil passage 16, and a hydraulic pressure P2 in the direction of the arrow in the figure is applied to the oil passage 16. This oil passage 16 is provided with a solenoid valve 17.
By discharging pressure oil from 6, the hydraulic pressure P2 can be adjusted appropriately. Therefore, if the hydraulic pressure P 2 is appropriately adjusted by the solenoid valve 17 and the spool valve 11 is slid to position only the oil passages 3 and 3 between the lands 12 and 13, low reverse can be achieved through the oil passage 3. Pressure oil can be supplied to the brake 5 (this position is defined as the oil pressure supply position), and if the oil passage 3 and oil drainage passage 15 are located between the lands 12 and 13, pressure oil can be supplied from the oil drainage passage 15. Pressure oil cannot be supplied to the low reverse brake 5 as it is discharged (this position is designated as the hydraulic discharge position).
更に、前期電磁弁１７をデユーテイ制御するコ
ントローラ１８、運転状態切換弁１のＲレンジを
検出するＲレンジ検出センサ１９、車速を検出す
る車速センサ２０、エンジンの回転数を検出する
回転数センサ２１が設けられている。上記コント
ローラ１８は各センサ１９，２０，２１からの出
力に基づき、車速が一定値を超えた時あるいは回
転数が一定値を超えた時に前記電磁弁１７をデユ
ーテイ制御して、油路１６から圧油を逃がし、油
圧P2が低くなると、油路切換弁１０のスプール
弁１１が図中左方に摺動し、油圧供給位置から油
圧排出位置へと切り換るようになつている。 Further, a controller 18 for duty-controlling the former solenoid valve 17, an R-range detection sensor 19 for detecting the R-range of the operating state switching valve 1, a vehicle speed sensor 20 for detecting vehicle speed, and a rotational speed sensor 21 for detecting the engine rotational speed. It is provided. Based on the outputs from the sensors 19, 20, and 21, the controller 18 duty-controls the solenoid valve 17 when the vehicle speed exceeds a certain value or when the rotational speed exceeds a certain value, thereby causing pressure to flow from the oil path 16. When the oil is released and the oil pressure P2 becomes low, the spool valve 11 of the oil passage switching valve 10 slides to the left in the figure, switching from the oil pressure supply position to the oil pressure discharge position.
上記構成を有する本考案の自動変速機の安全装
置において、車速が一定値を超えた時に誤つて運
転状態切換弁１をＲレンジ即ち後進位置に切り換
ると、運転状態切換弁１のランド８，９の間を通
つて油圧P1が油路２，３に流入する、一方、車
速が一定値を超えたことが車速センサ２０により
検出され、その出力に基づいてコントローラ１８
が電磁弁１７を制御し、油路１６から圧油を逃が
し、スプール弁１１を図中左方に摺動させ油圧排
出位置にする。このため、油路３を通つて油路切
換弁１０のランド１２，１３間に流入した圧油は
排油路１６から排出し、圧油はローリバースブレ
ーキ５に供給されないこととなるのである。この
ように、車速が一定値を超えた時に誤つて運転状
態切換弁１を後進位置に切り換ても後進段が達成
されないので、急制動やエンストが起きず、ミツ
シヨンが破損せず、安全性に優れる。また、ここ
で、車速の一定値としては急制動等の危険な状態
が生じない程度の速度が選ばれ、通常非常に低い
値が選ばれ、通常非常に低い値が選ばれる。 In the automatic transmission safety device of the present invention having the above configuration, if the operating state switching valve 1 is mistakenly switched to the R range, that is, the reverse position when the vehicle speed exceeds a certain value, the land 8 of the operating state switching valve 1 , 9 into the oil passages 2 and 3. On the other hand, the vehicle speed sensor 20 detects that the vehicle speed exceeds a certain value, and the controller 18 detects that the vehicle speed exceeds a certain value.
controls the solenoid valve 17 to release pressure oil from the oil passage 16, and slides the spool valve 11 to the left in the figure to the oil pressure discharge position. Therefore, the pressure oil that has flowed between the lands 12 and 13 of the oil passage switching valve 10 through the oil passage 3 is discharged from the oil drainage passage 16, and the pressure oil is not supplied to the low reverse brake 5. In this way, even if the driving state switching valve 1 is mistakenly switched to the reverse position when the vehicle speed exceeds a certain value, the reverse gear will not be achieved, so sudden braking or stalling will not occur, the transmission will not be damaged, and safety will be improved. Excellent in Further, here, as the constant value of the vehicle speed, a speed that does not cause a dangerous situation such as sudden braking is selected, and usually a very low value is selected.
更に、本実施例では車速が一定値を超えた時と
同様回転数が一定値を超えた時にも、後進段が達
成されないようにしている。回転数が高い時に急
に後進段が達成されると急発進すると共に過大な
シヨツクが発生して危険であるからである。尚、
本実施例では後退用摩擦要素としてフロントクラ
ツチ４、ローリバースブレーキ５を用いており、
このフロントクラツチ４及びローリバースブレー
キ５に圧油を共に供給しなければ後進段が達成さ
れないように構成しているが、本発明はこのよう
なものに限定されるのではなく、後退用摩擦要素
としては複数でなく単一のものでも構わない。 Furthermore, in this embodiment, the reverse gear is not achieved even when the rotational speed exceeds a certain value, as well as when the vehicle speed exceeds a certain value. This is because if the reverse gear is suddenly achieved when the rotational speed is high, a sudden start will occur and an excessive shock will occur, which is dangerous. still,
In this embodiment, a front clutch 4 and a low reverse brake 5 are used as friction elements for reversing.
Although the configuration is such that the reverse gear cannot be achieved unless pressurized oil is supplied to both the front clutch 4 and the low reverse brake 5, the present invention is not limited to this, and the reverse friction element It does not matter if there is a single number instead of multiple numbers.
また、上記実施例では、車速及びエンジン回転
数に基づいて制御しているが、これらのうちのい
ずれか一方に基づいて制御しても、誤操作に対し
有効なものである。 Further, in the above embodiment, control is performed based on the vehicle speed and engine rotation speed, but control based on either one of these is also effective against erroneous operation.
〈考案の効果〉
以上、実施例に基づいて具体的に説明したよう
に本考案では、前進走行中に誤つて後進段を選択
しても、後進段が達成されないので、急制動やエ
ンストを起こすこともなく、ミツシヨンも破損す
ることもないなど安全性が向上する。<Effects of the invention> As explained above in detail based on the embodiments, in the present invention, even if reverse gear is selected by mistake while driving forward, the reverse gear is not achieved, causing sudden braking or engine stalling. This improves safety, as there is no risk of damage to the transmission.
第１図は従来の自動変速機の油圧回路の概略構
成図、第２図は本考案の自動変速機の安全装置に
係る概略構成図である。
図面中、１は運転状態切換弁、２，３は油路、
４はフロントクラツチ（後退用摩擦要素）、５は
ローリバースブレーキ（後退用摩擦要素）、１０
は油路切換弁、１７は電磁弁、１８はコントロー
ラ、２０は車速センサである。
FIG. 1 is a schematic diagram of a hydraulic circuit of a conventional automatic transmission, and FIG. 2 is a schematic diagram of a safety device for an automatic transmission according to the present invention. In the drawing, 1 is an operating state switching valve, 2 and 3 are oil passages,
4 is a front clutch (reverse friction element), 5 is a low reverse brake (reverse friction element), 10
1 is an oil passage switching valve, 17 is an electromagnetic valve, 18 is a controller, and 20 is a vehicle speed sensor.
Claims (1)
へ油圧源からの圧油を供給するための第１の位置
と上記変速機を上記後進以外の状態とするための
第２の位置とに切換可能な運転状態切換弁、上記
油圧源と上記後進用摩擦要素とを連通する油路に
配設され同後進用摩擦要素へ油圧を供給する油圧
供給位置と同後進用摩擦要素への油圧を排出する
油圧排出位置とに切換可能な油圧切換弁と、同油
圧切換弁を上記油圧供給位置と上記油圧排出位置
との間で切換える電磁弁と、車両の運転状態に応
じて同電磁弁を作動させるコントローラとを備え
た自動変速機において、車速を検出する車速セン
サと、エンジンの回転速度を検出する回転数セン
サと、上記運転状態切換弁が上記第１の位置に設
定されていることを検出する位置センサとを設
け、車速及びエンジン回転数の少なくとも何れか
一方が所定値以上で上記運転状態切換弁が上記第
１の位置へ切換えられたときに上記電磁弁を作動
させて上記油圧切換弁を上記油圧排出位置に切換
ることを特徴とする電子制御式自動変速機の安全
装置。 Switching between a first position for supplying pressure oil from a hydraulic source to a reverse friction element that puts the transmission in a reverse drive state, and a second position for putting the transmission in a state other than reverse. a possible operating state switching valve, which is disposed in an oil passage that communicates the hydraulic pressure source with the reversing friction element, and has a hydraulic pressure supply position for supplying hydraulic pressure to the reversing friction element and discharging hydraulic pressure to the reversing friction element; a hydraulic switching valve that can be switched to a hydraulic discharge position; a solenoid valve that switches the hydraulic switching valve between the hydraulic pressure supply position and the hydraulic discharge position; and a solenoid valve that operates according to the operating state of the vehicle. In an automatic transmission equipped with a controller, a vehicle speed sensor that detects vehicle speed, a rotation speed sensor that detects engine rotation speed, and detects that the operating state switching valve is set to the first position. a position sensor, and when at least one of vehicle speed and engine rotational speed is equal to or higher than a predetermined value and the operating state switching valve is switched to the first position, the electromagnetic valve is operated to switch the hydraulic switching valve. A safety device for an electronically controlled automatic transmission characterized by switching to the above hydraulic discharge position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2308089U JPH0517499Y2 (en) | 1989-03-02 | 1989-03-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2308089U JPH0517499Y2 (en) | 1989-03-02 | 1989-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02459U JPH02459U (en) | 1990-01-05 |
| JPH0517499Y2 true JPH0517499Y2 (en) | 1993-05-11 |
Family
ID=31241774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2308089U Expired - Lifetime JPH0517499Y2 (en) | 1989-03-02 | 1989-03-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0517499Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4786169B2 (en) * | 2004-11-12 | 2011-10-05 | 富士通テン株式会社 | Transmission control device |
-
1989
- 1989-03-02 JP JP2308089U patent/JPH0517499Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02459U (en) | 1990-01-05 |
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