JPH01178265U - - Google Patents
Info
- Publication number
- JPH01178265U JPH01178265U JP7484088U JP7484088U JPH01178265U JP H01178265 U JPH01178265 U JP H01178265U JP 7484088 U JP7484088 U JP 7484088U JP 7484088 U JP7484088 U JP 7484088U JP H01178265 U JPH01178265 U JP H01178265U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic chamber
- chamber
- actuator
- piston
- 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 3
- 230000001360 synchronised effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Gear-Shifting Mechanisms (AREA)
- Control Of Transmission Device (AREA)
Description
第１図は本考案の一実施例の構成を示す図であ
る。第２図および第３図は第１図の第１シフトシ
リンダおよび第２シフトシリンダの構成をそれぞ
れ説明する断面図である。第４図、第５図、およ
び第６図は、第２図の第１シフトシリンダによつ
て駆動される同期装置の作動を説明する図であつ
て、第４図はニユートラル状態を示す要部断面図
、第５図はスリーブとキーとの相対移動が開始さ
れたときの状態を示す要部断面図、第６図はスリ
ーブの移動が同期リングにより一旦阻止されたと
きの状態を示す展開図である。第７図は第２図の
第１シフトシリンダの作動中におけるシフト荷重
の変化を示す図である。第８図は従来の場合にお
ける第７図に相当する図である。第９図は第１図
の第１シフトシリンダの他の例を示す図であつて
、第２図に相当する図である。
２６：自動変速機、２８：第１シフトシリンダ
（油圧アクチユエータ）、４０：大径油圧室（油
圧室）、４２：小径油圧室（油圧室）、６６：シ
フトレバー（シフト部材）、７２：シフトロツド
（シフト部材）、７４，７６，７８：係合部材（
シフト部材）、８６：シフトフオーク（シフト部
材）、９０：同期装置、１００：アキユムレータ
、１０２：シリンダボア、１０４，１０６：受圧
面、１０８：ピストン、１１０，１１２：油圧室
（第一、第二油圧室）、１１８，１２０：圧縮コ
イルスプリング（第一、第二スプリング）、１２
２：シフトシリンダ（油圧アクチユエータ）、１
３０，１３２：油圧室。
FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. 2 and 3 are cross-sectional views illustrating the structures of the first shift cylinder and the second shift cylinder shown in FIG. 1, respectively. 4, 5, and 6 are diagrams illustrating the operation of the synchronizer driven by the first shift cylinder in FIG. 2, and FIG. 4 shows the main parts in a neutral state. 5 is a cross-sectional view of the main part showing the state when the relative movement between the sleeve and the key has started, and FIG. 6 is a developed view showing the state when the movement of the sleeve is once blocked by the synchronization ring. It is. FIG. 7 is a diagram showing changes in shift load during operation of the first shift cylinder in FIG. 2. FIG. FIG. 8 is a diagram corresponding to FIG. 7 in the conventional case. FIG. 9 is a diagram showing another example of the first shift cylinder of FIG. 1, and corresponds to FIG. 2. 26: automatic transmission, 28: first shift cylinder (hydraulic actuator), 40: large diameter hydraulic chamber (hydraulic chamber), 42: small diameter hydraulic chamber (hydraulic chamber), 66: shift lever (shift member), 72: shift rod (shift member), 74, 76, 78: engaging member (
Shift member), 86: Shift fork (shift member), 90: Synchronizer, 100: Accumulator, 102: Cylinder bore, 104, 106: Pressure receiving surface, 108: Piston, 110, 112: Hydraulic chamber (first, second hydraulic chamber), 118, 120: compression coil spring (first, second spring), 12
2: Shift cylinder (hydraulic actuator), 1
30,132: Hydraulic chamber.
Claims (1)
されることによりギヤ段が同期装置の同期作動を
利用して自動的に切り換えられる形式の同期噛合
式の車両用自動変速機において、前記油圧アクチ
ユエータ内の一対の油圧室の一方または両方に作
動油圧を供給することにより該油圧アクチユエー
タを作動させる油圧装置であつて、 シリンダボアと、該シリンダボア内に摺動可能
に設けられ、一対の受圧面が同一の受圧面積を有
するピストンと、該シリンダボアと該ピストンと
によつて形成され、前記油圧アクチユエータの油
圧室の一方に接続された第一油圧室および該油圧
アクチユエータの油圧室の他方に接続された第二
油圧室と、該第一油圧室内に設けられ、前記ピス
トンを該第二油圧室側へ付勢する第一スプリング
と、該第二油圧室内に設けられ、該ピストンを該
第一油圧室側へ付勢する第二スプリングとを備え
、該第一油圧室または第二油圧室の容積増大に基
づいて前記油圧アクチユエータの油圧室内の作動
油圧の急激な上昇を緩和するアキユムレータを、
含むことを特徴とする車両用自動変速機の油圧装
置。[Claims for Utility Model Registration] In a synchronous mesh automatic transmission for a vehicle in which a shift member is driven by a hydraulic actuator to automatically change gears using the synchronous operation of a synchronizer. , a hydraulic device that operates the hydraulic actuator by supplying working pressure to one or both of a pair of hydraulic chambers in the hydraulic actuator, the hydraulic actuator having a cylinder bore and a pair of hydraulic chambers slidably provided in the cylinder bore; A first hydraulic chamber formed by a piston whose pressure receiving surface has the same pressure receiving area, the cylinder bore and the piston, and connected to one of the hydraulic chambers of the hydraulic actuator, and a first hydraulic chamber connected to the other hydraulic chamber of the hydraulic actuator. A second hydraulic chamber is connected to the first hydraulic chamber, a first spring is provided in the first hydraulic chamber and urges the piston toward the second hydraulic chamber, and a first spring is provided in the second hydraulic chamber and urges the piston toward the second hydraulic chamber. a second spring that biases toward one hydraulic chamber, and an accumulator that alleviates a sudden increase in the working pressure in the hydraulic chamber of the hydraulic actuator based on an increase in the volume of the first hydraulic chamber or the second hydraulic chamber;
A hydraulic system for a vehicle automatic transmission, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7484088U JPH0612303Y2 (en) | 1988-06-03 | 1988-06-03 | Hydraulic system of automatic transmission for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7484088U JPH0612303Y2 (en) | 1988-06-03 | 1988-06-03 | Hydraulic system of automatic transmission for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01178265U true JPH01178265U (en) | 1989-12-20 |
| JPH0612303Y2 JPH0612303Y2 (en) | 1994-03-30 |
Family
ID=31299929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7484088U Expired - Lifetime JPH0612303Y2 (en) | 1988-06-03 | 1988-06-03 | Hydraulic system of automatic transmission for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612303Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013072532A (en) * | 2011-09-29 | 2013-04-22 | Bosch Corp | Transmission control device |
-
1988
- 1988-06-03 JP JP7484088U patent/JPH0612303Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013072532A (en) * | 2011-09-29 | 2013-04-22 | Bosch Corp | Transmission control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0612303Y2 (en) | 1994-03-30 |
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