JPH02136847U - - Google Patents
Info
- Publication number
- JPH02136847U JPH02136847U JP4653189U JP4653189U JPH02136847U JP H02136847 U JPH02136847 U JP H02136847U JP 4653189 U JP4653189 U JP 4653189U JP 4653189 U JP4653189 U JP 4653189U JP H02136847 U JPH02136847 U JP H02136847U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fluid pressure
- clutches
- load piston
- inching
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 2
- 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を示す変速機のイン
チング作動時の流体圧制御回路図、、第２図は同
クラツチ結合時の回路図、第３図は本考案により
得られたモジユレート波形図、第４図はインチン
グＯＮ、ＯＦＦの時の正常なモジユレート油圧波
形図、第５図はインチングのＯＮ、ＯＦＦを短時
間に頻繁に行なつたときのモジユレート油圧波形
図、第６図はソレノイドバルブによりインチング
ＯＮ時にロードピストンの油をドレンさせた場合
の波形図、第７図はインチングＯＮの状態が長く
持続されその後インチングＯＦＦした場合の波形
図、第８図はトランスミツシヨン中立時のコント
ロールバルブの状態を示す回路図、第９図は前進
一速への切換時の回路図、第１０図はクラツチ結
合時の回路図、第１１図はインチング作動時の回
路図である。
１：インレツトポート、２：レギユレートバル
ブ、２ａ：スプール、３：回路、４：モジユレー
トバルブ、５：回路、６，７，８，９：回路、１
０：速度変換バルブ、１１，１２，１３：速度段
クラツチ、１４：フローセンシングバルブ、１５
：回路、１６：ロードピストン、１７：インチン
グバルブ、１８：回路、１９：方向変換バルブ、
２０：回路、２１：前進クラツチ、２２：：後進
クラツチ、３１，３２，３３：変速段クラツチ、
３５：回路、３６：チエツクバルブ、３７：回路
。
Fig. 1 is a fluid pressure control circuit diagram during inching operation of a transmission showing an embodiment of the present invention, Fig. 2 is a circuit diagram when the same clutch is engaged, and Fig. 3 is a modulated waveform obtained by the present invention. Figure 4 is a normal modulate oil pressure waveform diagram when inching is ON and OFF, Figure 5 is a modulate oil pressure waveform diagram when inching is turned ON and OFF frequently in a short period of time, and Figure 6 is a diagram of the solenoid. Waveform diagram when the oil in the load piston is drained by the valve when inching is ON. Figure 7 is a waveform diagram when the inching ON state continues for a long time and then inching is turned OFF. Figure 8 is the control when the transmission is in neutral. FIG. 9 is a circuit diagram showing the state of the valve; FIG. 9 is a circuit diagram when switching to first forward speed; FIG. 10 is a circuit diagram when the clutch is engaged; FIG. 11 is a circuit diagram when inching operation is performed. 1: Inlet port, 2: Regulate valve, 2a: Spool, 3: Circuit, 4: Modulate valve, 5: Circuit, 6, 7, 8, 9: Circuit, 1
0: Speed conversion valve, 11, 12, 13: Speed stage clutch, 14: Flow sensing valve, 15
: circuit, 16: load piston, 17: inching valve, 18: circuit, 19: direction conversion valve,
20: Circuit, 21: Forward clutch, 22: Reverse clutch, 31, 32, 33: Gear clutch,
35: circuit, 36: check valve, 37: circuit.
Claims (1)
および前後進クラツチ２１，２２に流体を供給し
て該クラツチを作動させるための変速機の流体圧
制御回路において、前記クラツチの連結時にクラ
ツチ流体圧を徐々に高くするためのモジユレート
バルブ４と、該モジユレートバルブ４を自動的に
作動させるためのロードピストン１６と、前記モ
ジユレートバルブ４から前記クラツチへの流体圧
により前記ロードピストン１６を作動させるフロ
ーセンシングバルブ１４と、前記クラツチへの流
路を開閉してインチング動作を行なうためのイン
チングバルブ１７とを備え、該インチングバルブ
１７は、前記フローセンシングバルブ１４とロー
ドピストン１６との間の流路３５に接続され、該
インチングバルブ１７内にチエツクバルブ３６が
設けられたことを特徴とする変速機の流体圧制御
回路。 Gear clutches 31, 32, 33 of hydraulic drive shaft
and a modulating valve 4 for gradually increasing the clutch fluid pressure when the clutches are engaged, in a fluid pressure control circuit of a transmission for supplying fluid to the forward and backward clutches 21 and 22 to operate the clutches. , a load piston 16 for automatically actuating the modulating valve 4; a flow sensing valve 14 for actuating the load piston 16 by fluid pressure from the modulating valve 4 to the clutch; The inching valve 17 is connected to the flow path 35 between the flow sensing valve 14 and the load piston 16, and the inching valve 17 is connected to the flow path 35 between the flow sensing valve 14 and the load piston 16. A fluid pressure control circuit for a transmission, characterized in that a check valve 36 is provided therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4653189U JPH02136847U (en) | 1989-04-19 | 1989-04-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4653189U JPH02136847U (en) | 1989-04-19 | 1989-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02136847U true JPH02136847U (en) | 1990-11-15 |
Family
ID=31561692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4653189U Pending JPH02136847U (en) | 1989-04-19 | 1989-04-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02136847U (en) |
-
1989
- 1989-04-19 JP JP4653189U patent/JPH02136847U/ja active Pending
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