JPH02459U - - Google Patents
Info
- Publication number
- JPH02459U JPH02459U JP2308089U JP2308089U JPH02459U JP H02459 U JPH02459 U JP H02459U JP 2308089 U JP2308089 U JP 2308089U JP 2308089 U JP2308089 U JP 2308089U JP H02459 U JPH02459 U JP H02459U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- switching valve
- friction element
- hydraulic pressure
- operating state
- 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
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Transmission Device (AREA)
Description
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
17 is an oil passage switching valve, 17 is a solenoid 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 the vehicle speed and the engine rotational speed is equal to or higher than a predetermined value, the operating state switching valve is activated.
A safety device for an electronically controlled automatic transmission, characterized in that when the transmission is switched to the position, the electromagnetic valve is operated to switch the hydraulic switching valve to the 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 true JPH02459U (en) | 1990-01-05 |
| JPH0517499Y2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006138424A (en) * | 2004-11-12 | 2006-06-01 | Fujitsu Ten Ltd | Transmission control device |
-
1989
- 1989-03-02 JP JP2308089U patent/JPH0517499Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006138424A (en) * | 2004-11-12 | 2006-06-01 | Fujitsu Ten Ltd | Transmission control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517499Y2 (en) | 1993-05-11 |
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