JP2751393B2 - Signal pressure generator - Google Patents
Signal pressure generatorInfo
- Publication number
- JP2751393B2 JP2751393B2 JP12273189A JP12273189A JP2751393B2 JP 2751393 B2 JP2751393 B2 JP 2751393B2 JP 12273189 A JP12273189 A JP 12273189A JP 12273189 A JP12273189 A JP 12273189A JP 2751393 B2 JP2751393 B2 JP 2751393B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- circuit
- output
- drain
- pilot
- 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 - Fee Related
Links
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- Fluid-Pressure Circuits (AREA)
- Control Of Transmission Device (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は自動変速機等の油圧回路に用いられる信号圧
発生装置に関するものである。Description: TECHNICAL FIELD The present invention relates to a signal pressure generator used for a hydraulic circuit such as an automatic transmission.
（従来の技術） この種信号圧発生装置としては、本願出願人が1987年
に発行した「RE4R01A型オートマチックトランスミッシ
ョン整備要領書」（A261C07）に記載の自動変速機中、
シフト弁及びオーバーランクラッチ制御弁のストローク
制御に用いられている如きものがある。(Prior Art) As this kind of signal pressure generator, an automatic transmission described in "RE4R01A Automatic Transmission Maintenance Manual" (A261C07) issued by the applicant of the present invention in 1987,
Some are used for stroke control of shift valves and overrun clutch control valves.
この装置は第２図に示す如く、パイロット弁１を具
え、これによりライン圧PLを一定のパイロット圧PPに減
圧してオリフィス3,5,7を経由し、信号圧回路9,11,13に
向かわせる。回路9,11,13は途中にドレンポート15,17,1
9を有し、これに常閉型のソレノイド弁21,23,25を対設
する。As shown in FIG. 2, this device is provided with a pilot valve 1, which reduces the line pressure P L to a constant pilot pressure P P, and passes through orifices 3, 5, 7 to signal pressure circuits 9, 11, Go to 13. Circuits 9, 11, and 13 have drain ports 15, 17, and 1
9 which is provided with normally closed solenoid valves 21, 23, 25.
ソレノイド弁21,23,25は夫々OFF時、ドレンポート15,
17,19を閉じて回路9,11,13からパイロット圧PPと同じ値
の信号圧PS1,PS2,PS3を発生させて出力する。ソレノイ
ド弁21,23,25のON時、対応するドレンポート15,17,19が
開かれて回路9,11,13からの信号圧を消失させる。この
間も、オリフィス3,5,7があるため、パイロット圧PPは
パイロット弁１による調圧値を保ち得る。When the solenoid valves 21, 23, 25 are OFF, the drain port 15,
17 and 19 to generate a signal pressure P S1, P S2, P S3 of the same value as the pilot pressure P P from the circuit 9, 11, 13 to close and outputs. When the solenoid valves 21, 23, 25 are turned on, the corresponding drain ports 15, 17, 19 are opened, and the signal pressure from the circuits 9, 11, 13 disappears. During this, because of the orifice 3, 5, 7, the pilot pressure P P can keep the pressure value by the pilot valve 1.
（発明が解決しようとする課題） しかしかかる従来の信号圧発生装置では、特にソレノ
イド弁が複数存在する場合において、これらソレノイド
弁が全て開いた時、第３図中瞬時t1以後に見られる如
く、ポート15,17,19からの大きな合計ドレン量でパイロ
ット弁１がパイロット圧PPを第３図中実線で示す調圧値
を維持し得なくなり、同図中点線で示す如くパイロット
圧のレベル不足を生じたり、このパイロット圧を振動さ
せ、同じパイロット圧で制御させる他の系に悪影響を及
ぼす。In (0006) but such conventional signal pressure generating device, in particular in the case where the solenoid valve there are a plurality, when these solenoid valves is opened all, as seen in the third in FIG instant t 1 after The pilot valve 1 cannot maintain the pilot pressure P P at the pressure regulation value shown by the solid line in FIG. 3 with the large total drain amount from the ports 15, 17, and 19, and the pilot pressure level is shown by the dotted line in FIG. Insufficiency may occur, or this pilot pressure may be vibrated, adversely affecting other systems controlled by the same pilot pressure.
なお上記振動が発生する理由は、上記のようにパイロ
ット弁１がパイロット圧PPを調圧値に維持し得なくなる
と、第２図にαで示す開度が極めて大きな状態でパイロ
ット弁１が調圧作用を行おうとし、この作用が不安定な
ためである。Note why the vibration occurs, the pilot valve 1 as described above is not obtained maintaining the pilot pressure P P in pressure value, the opening indicated by α in Figure 2 the pilot valve 1 is in a very large state This is because an attempt is made to adjust the pressure, and this action is unstable.
本発明は、パイロット弁（減圧弁）をバイパスして作
動流体の補充を行うようにすることで上述の問題を解消
することを目的とする。An object of the present invention is to solve the above-mentioned problem by replenishing a working fluid by bypassing a pilot valve (pressure reducing valve).
（課題を解決するための手段） この目的のため本発明は、 出力回路の出力圧をパイロット圧とする減圧弁により
前記出力回路を元圧回路とドレン回路とに選択的に接続
することで前記元圧回路からの元圧を減圧して前記出力
回路に出力し、前記出力回路の出力圧を絞り要素の下流
においてドレンすることで信号圧を消失させ、前記ドレ
ンの中止により信号圧を発生させるようにした信号圧発
生装置において、 前記元圧回路と前記出力回路とを、絞り要素を挿置す
るとともにその絞り要素より上流側をドレン回路から分
離させたバイパス回路により接続してなることを特徴と
するものである。(Means for Solving the Problems) For this purpose, the present invention provides a method for selectively connecting the output circuit to a source pressure circuit and a drain circuit by a pressure reducing valve that uses the output pressure of the output circuit as a pilot pressure. The source pressure from the source pressure circuit is reduced and output to the output circuit, and the output pressure of the output circuit is drained downstream of the throttle element to eliminate the signal pressure, and the signal pressure is generated by stopping the drain. In the signal pressure generating device described above, the source pressure circuit and the output circuit are connected by a bypass circuit in which a throttle element is inserted and an upstream side of the throttle element is separated from a drain circuit. It is assumed that.
（作 用） この信号圧発生装置にあっては、減圧弁が、出力回路
の出力圧をパイロット圧として前記出力回路を元圧回路
とドレン回路とに選択的に接続することで前記元圧回路
からの元圧を減圧して前記出力回路に出力し、この出力
回路の出力圧が絞り要素を経てその下流の回路に伝わ
る。しかしてこの装置では、前記絞り要素の下流の回路
において、ドレンすることで信号圧を消失させ、前記ド
レンの中止により前記出力値と同じ値の信号圧を発生さ
せる。(Operation) In this signal pressure generating device, the pressure reducing valve selectively connects the output circuit to the source pressure circuit and the drain circuit by using the output pressure of the output circuit as the pilot pressure, so that the source pressure circuit The output pressure of the output circuit is reduced and output to the output circuit, and the output pressure of the output circuit is transmitted to a downstream circuit through the throttle element. Thus, in this device, in the circuit downstream of the throttle element, the signal pressure is lost by draining, and the signal pressure having the same value as the output value is generated by stopping the drain.
そしてこの装置では、前記元圧回路と前記出力回路と
を、絞り要素を挿置するとともにその絞り要素より上流
側をドレン回路から分離させたバイパス回路により接続
しているので、上記のドレンが多量で通常なら減圧弁が
出力回路の出力圧を所定の調圧値に維持し得なくなる状
況の下でも、そのバイパス回路からの追加流量分でドレ
ン量の過多分を補うことができ、これにより減圧弁は相
変わらず、出力圧を調圧値に維持し得る安定した調圧作
用を継続し得て、出力圧のレベル不足や振動を防止する
ことができる。In this device, the source pressure circuit and the output circuit are connected by a bypass circuit in which a throttle element is inserted and an upstream side of the throttle element is separated from a drain circuit. Under normal circumstances, even in a situation where the pressure reducing valve cannot maintain the output pressure of the output circuit at the predetermined pressure regulation value, the excess amount of drain can be compensated for by the additional flow rate from the bypass circuit, thereby reducing the pressure. The valve can continue to maintain a stable pressure adjusting operation capable of maintaining the output pressure at the pressure adjusting value, thereby preventing the output pressure level from becoming insufficient and causing vibration.
またこの装置では、ドレン量が少ない場合にバイパス
回路からの追加流量分で出力回路の出力圧が上記調圧値
より上昇しようとすると、その出力回路の出力圧をパイ
ロット圧とする減圧弁が、その出力回路をドレン回路に
接続してその出力圧を上記調圧値に維持する。Further, in this device, when the output pressure of the output circuit is going to rise above the pressure regulation value by the additional flow rate from the bypass circuit when the drain amount is small, a pressure reducing valve that uses the output pressure of the output circuit as the pilot pressure is provided. The output circuit is connected to a drain circuit to maintain the output pressure at the above-mentioned regulated value.
従ってこの装置によれば、上記出力回路の出力圧によ
り直接または間接的に制御される他の制御系の動作が誤
動作となったり不正確になったりするのを防止すること
ができる。Therefore, according to this device, it is possible to prevent the operation of another control system directly or indirectly controlled by the output pressure of the output circuit from malfunctioning or becoming inaccurate.
（実施例） 以下、本発明の実施例を図面に基づき詳細に説明す
る。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明信号圧発生装置の一実施例で、図中第
２図におけると同様の部分を同一符号にて示す。FIG. 1 shows an embodiment of the signal pressure generating apparatus according to the present invention, in which the same parts as those in FIG. 2 are indicated by the same reference numerals.
減圧弁としてのパイロット弁１はスプール1aを具え、
これをばね1bで図中右方へ付勢する。スプール1aは図中
右行位置で、出力回路27を元圧回路29に通じ、この元圧
回路には元圧としてのライン圧PLを供給する。スプール
1aの図中右行位置で、回路29のライン圧PLは出力回路27
にパイロット圧PPを生ぜしめ、このパイロット圧をフィ
ードバック回路13を経て室1cに導くことで、スプール1a
をばね1bに抗して図中左方へ押し戻す。押し戻し量はパ
イロット圧PPの上昇につれて大きくなり、パイロット圧
PPがばね1bのばね力に対応する値以上になる時、スプー
ル1aは出力回路27を元圧回路29から遮断し、ドレンポー
ト1dへ切り換え接続させてパイロット圧過剰分をドレン
する。かくてパイロット弁１は出力回路27へのパイロッ
ト圧PPをばね1bのばね力に対応した一定の調圧値に第３
図中実線の如くに保つ。The pilot valve 1 as a pressure reducing valve has a spool 1a,
This is urged rightward in the figure by the spring 1b. Spool 1a is a rightward position in the drawing, through the output circuit 27 based on pressure circuit 29, and supplies the line pressure P L as source pressure for this original pressure circuit. spool
In figure rightward position of 1a, the line pressure P L of the circuit 29 the output circuit 27
The pilot pressure P P is generated in the spool 1a by guiding the pilot pressure to the chamber 1c through the feedback circuit 13.
Is pushed back to the left in the figure against the spring 1b. Pushing back amount increases with increasing pilot pressure P P, the pilot pressure
When P P spring 1b a value corresponding more to the spring force of the spool 1a blocks the output circuit 27 from the source pressure circuit 29, by switching the connection to the drain port 1d to drain the excess pilot pressure. Thus the pilot valve 1 and the third on certain pressure value corresponding to the pilot pressure P P to the output circuit 27 to the spring force of the spring 1b
Keep as shown by the solid line in the figure.
前記した本発明の目的を達成するために、元圧回路29
及び出力回路27間を、絞り要素としてのオリフィス32が
挿置されたバイパス回路33により接続する。しかして本
例では、バイパス回路33と元圧回路29との接続を、パイ
ロット弁１の元圧回路29が接続された入力ポート条溝1e
を介して行う。In order to achieve the above object of the present invention, the main pressure circuit 29
And the output circuit 27 are connected by a bypass circuit 33 in which an orifice 32 as an aperture element is inserted. Thus, in this example, the connection between the bypass circuit 33 and the main pressure circuit 29 is changed to the input port groove 1e to which the main pressure circuit 29 of the pilot valve 1 is connected.
Done through.
これにより、元圧回路29の作動流体が常時オリフィス
32の内径に応じた割合で出力回路27へ直接供給されるこ
ととなる。しかし、これによりパイロット圧PPが上昇し
ようとしても、これが室1cにフィードバックされて出力
回路27をドレンポート1dに通じさせるため、パイロット
圧PPは上昇されることなく調圧値に保たれ、バイパス回
路33が減圧弁１の調圧作用を妨げることはない。As a result, the working fluid in the main pressure circuit 29 is constantly orifice
The signal is directly supplied to the output circuit 27 at a ratio corresponding to the inner diameter of 32. However, even if the pilot pressure P P attempts to increase, this is fed back to the chamber 1c to connect the output circuit 27 to the drain port 1d, so that the pilot pressure P P is maintained at the regulated value without being raised. The bypass circuit 33 does not hinder the pressure regulating operation of the pressure reducing valve 1.
出力回路27を、信号圧により制御すべき弁の数（図示
例では３個）だけ分岐させ、夫々の分岐路中に絞り要素
としてのオリフィス3,5,7を挿置し、これらオリフィス
の下流を信号圧回路9,11,13となす。各信号圧回路は信
号圧により制御すべき弁（図示せず）に接続し、途中に
ドレンポート15,17,19を設ける。ドレンポート15,17,19
には夫々第１ソレノイド弁21、第２ソレノイド弁23、及
び第３ソレノイド弁25を対設し、これら弁は夫々常態で
ばね21a,23a,25aにより閉弁方向へ付勢された弁体21b,2
3b,25bでドレンポート15,17,19を閉じ、ソレノイド21c,
23c,25cのON時対応するドレンポートを開くものとす
る。The output circuit 27 is branched by the number of valves to be controlled by the signal pressure (three in the illustrated example), and orifices 3, 5, and 7 as throttle elements are inserted in the respective branch paths, and the downstream of these orifices is inserted. Are signal pressure circuits 9, 11, 13. Each signal pressure circuit is connected to a valve (not shown) to be controlled by the signal pressure, and drain ports 15, 17, and 19 are provided on the way. Drain port 15, 17, 19
Are provided with a first solenoid valve 21, a second solenoid valve 23, and a third solenoid valve 25, respectively, and these valves are respectively valved in a normal state by springs 21a, 23a, 25a in a valve closing direction 21b. , 2
Close drain ports 15, 17, and 19 with 3b and 25b, and
When 23c and 25c are ON, the corresponding drain port shall be opened.
上記実施例の作用を次に説明する。 The operation of the above embodiment will now be described.
パイロット弁１は前記作用により回路29のライン圧PP
を減圧して一定のパイロット圧PPとなし、回路27へ出力
している。第１ソレノイド弁21をソレノイド21cのOFFに
より閉じると、回路９よりパイロット圧PPと同じ値の信
号圧PS1が出力し、ソレノイド弁21をソレノイド21cのON
により開くと、信号圧PS1はドレンポート15によりドレ
ンされて消失し、信号圧PS1により対応する弁のストロ
ークを制御することができる。同様にソレノイド弁23,2
5のON,OFFで回路11,13からの信号圧PS2,PS3を消失させ
たり、発生させ、対応する弁のストロークを制御するこ
とができる。The pilot valve 1 operates the line pressure P P of the circuit 29 by the above operation.
The under reduced pressure constant pilot pressure P P ungated, and outputs to the circuit 27. When the first solenoid valve 21 is closed by the OFF of the solenoid 21c, and outputs the signal pressure P S1 of the same value as the pilot pressure P P from the circuit 9, ON of the solenoid valve 21 solenoid 21c
When opened, the signal pressure PS1 is drained by the drain port 15 and disappears, and the stroke of the corresponding valve can be controlled by the signal pressure PS1 . Similarly, solenoid valves 23 and 2
The signal pressures P S2 and P S3 from the circuits 11 and 13 can be eliminated or generated by turning ON and OFF of 5 to control the strokes of the corresponding valves.
ところで、元圧回路29及び出力回路27間を接続するバ
イパス回路33はオリフィス32の内径に応じた割合で元圧
回路29の作動流体を直接出力回路27へ流入させている。
このため、全てのソレノイド弁21,23,25が開いてポート
15,17,19からの合計ドレン量が多くなり、通常ならパイ
ロット弁１が前記の調圧値を維持し得なくなる状況のも
のとでも、バイパス回路33からの流入分で上記ドレン量
が多くなった分を補うことができる。従って、パイロッ
ト弁１はこの場合も前記調圧作用を継続し得て、パイロ
ット圧PPを第３図中点線で示す如くレベル低下させた
り、振動させることなく、同図中実線で示す如く調圧値
に維持することができる。よって、パイロット圧PPによ
り直接又は間接的に制御される他の制御系の動作が誤動
作となったり、不正確になるのを防止することができ
る。By the way, the bypass circuit 33 connecting the main pressure circuit 29 and the output circuit 27 allows the working fluid of the main pressure circuit 29 to flow directly into the output circuit 27 at a ratio corresponding to the inner diameter of the orifice 32.
As a result, all solenoid valves 21, 23, 25 are opened and ports
Even in the situation where the total drain amount from 15, 17 and 19 becomes large and the pilot valve 1 cannot normally maintain the above-mentioned pressure regulation value, the above-mentioned drain amount increases due to the inflow from the bypass circuit 33. Can make up for it. Therefore, even if the pilot valve 1 This obtained continues for the regulating pressure acting, or by reduced levels as indicating the pilot pressure P P in FIG. 3 in dotted lines, without vibrating, as tone indicated by a solid line in FIG. The pressure value can be maintained. Therefore, it is possible to operate other control system that is directly or indirectly controlled by the pilot pressure P P is or becomes malfunction, to prevent the inaccurate.
（発明の効果） かくして本発明の信号圧発生装置によれば、信号圧回
路のドレンが多量で通常なら減圧弁が出力回路の出力圧
を所定の調圧値に維持し得なくなる状況の下でも、バイ
パス回路からの追加流量分でドレン量の過多分を補うこ
とができるので減圧弁が出力圧を調圧値に維持し得る安
定した調圧作用を継続し得て、出力圧のレベル不足や振
動を防止することができ、また信号圧回路のドレン量が
少ないためにバイパス回路からの追加流量分で出力回路
の出力圧が上記調圧値より上昇しようとする場合にも、
その出力回路の出力値をパイロット圧とする減圧弁がそ
の出力回路をドレン回路に接続することで、その出力圧
を上記調圧値に維持することができる。(Effect of the Invention) According to the signal pressure generating device of the present invention, the signal pressure circuit has a large amount of drain and the pressure reducing valve cannot normally maintain the output pressure of the output circuit at a predetermined pressure regulation value even under a situation where the drainage of the signal pressure circuit is large. Since the excess amount of drain can be compensated for by the additional flow rate from the bypass circuit, the pressure-reducing valve can maintain a stable pressure-regulating action that can maintain the output pressure at the pressure-regulating value. Vibration can be prevented, and even when the output pressure of the output circuit is going to rise above the pressure regulation value due to the additional flow rate from the bypass circuit because the drain amount of the signal pressure circuit is small,
A pressure reducing valve that uses the output value of the output circuit as a pilot pressure connects the output circuit to a drain circuit, so that the output pressure can be maintained at the above-mentioned regulated value.
従って本発明の信号圧発生装置によれば、減圧弁で減
圧した出力回路の出力圧により直接または間接的に制御
される他の制御系の動作が誤動作となったり不正確にな
ったりするのを防止することができる。Therefore, according to the signal pressure generating device of the present invention, the operation of another control system controlled directly or indirectly by the output pressure of the output circuit reduced by the pressure reducing valve is prevented from malfunctioning or becoming inaccurate. Can be prevented.
第１図は本発明信号圧発生装置の一実施例を示す油圧回
路図、 第２図は従来の信号圧発生装置を示す油圧回路図、 第３図は全ソレノイド弁が開いた時のパイロット圧変化
を本発明装置による場合と、従来装置にらる場合とで比
較して示すタイムチャートである。 １……パイロット弁（減圧弁） 3,5,7……オリフィス（絞り要素） 9,11,13……信号圧回路 15,17,19……ドレンポート 21,23,25……ソレノイド弁 27……出力回路、29……元圧回路 32……オリフィス（絞り要素） 33……バイパス回路。FIG. 1 is a hydraulic circuit diagram showing an embodiment of the signal pressure generating device of the present invention, FIG. 2 is a hydraulic circuit diagram showing a conventional signal pressure generating device, and FIG. 3 is a pilot pressure when all solenoid valves are opened. 6 is a time chart showing a comparison between the case of the apparatus according to the present invention and the case of the conventional apparatus. 1 ... Pilot valve (pressure reducing valve) 3,5,7 ... Orifice (throttle element) 9,11,13 ... Signal pressure circuit 15,17,19 ... Drain port 21,23,25 ... Solenoid valve 27 ... output circuit, 29 ... source pressure circuit 32 ... orifice (throttle element) 33 ... bypass circuit.
Claims (1)
圧弁により前記出力回路を元圧回路とドレン回路とに選
択的に接続することで前記元圧回路からの元圧を減圧し
て前記出力回路に出力し、前記出力回路の出力圧を絞り
要素の下流においてドレンすることで信号圧を消失さ
せ、前記ドレンの中止により信号圧を発生させるように
した信号圧発生装置において、 前記元圧回路と前記出力回路とを、絞り要素を挿置する
とともにその絞り要素より上流側をドレン回路から分離
させたバイパス回路により接続してなることを特徴とす
る、信号圧発生装置。An output circuit configured to selectively connect the output circuit to a source pressure circuit and a drain circuit by a pressure reducing valve that uses an output pressure of the output circuit as a pilot pressure to reduce a source pressure from the source pressure circuit; A signal pressure generator that outputs the output pressure to the output circuit, drains the output pressure of the output circuit downstream of the throttle element to eliminate the signal pressure, and generates the signal pressure by stopping the drain. A signal pressure generator, wherein a circuit and the output circuit are connected by a bypass circuit in which a throttle element is inserted and an upstream side of the throttle element is separated from a drain circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12273189A JP2751393B2 (en) | 1989-05-18 | 1989-05-18 | Signal pressure generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12273189A JP2751393B2 (en) | 1989-05-18 | 1989-05-18 | Signal pressure generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02304245A JPH02304245A (en) | 1990-12-18 |
| JP2751393B2 true JP2751393B2 (en) | 1998-05-18 |
Family
ID=14843191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12273189A Expired - Fee Related JP2751393B2 (en) | 1989-05-18 | 1989-05-18 | Signal pressure generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2751393B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100471271B1 (en) * | 2002-11-06 | 2005-03-08 | 현대자동차주식회사 | Hydraulic control system of automatic transmission for vehicle |
| JP4513553B2 (en) * | 2004-12-24 | 2010-07-28 | トヨタ自動車株式会社 | Control device for belt type continuously variable transmission |
-
1989
- 1989-05-18 JP JP12273189A patent/JP2751393B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02304245A (en) | 1990-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |