JPH0242251A - Electronically controlled automatic transmission and control method for its friction engagement element at low oil temperature - Google Patents
Electronically controlled automatic transmission and control method for its friction engagement element at low oil temperatureInfo
- Publication number
- JPH0242251A JPH0242251A JP18960488A JP18960488A JPH0242251A JP H0242251 A JPH0242251 A JP H0242251A JP 18960488 A JP18960488 A JP 18960488A JP 18960488 A JP18960488 A JP 18960488A JP H0242251 A JPH0242251 A JP H0242251A
- Authority
- JP
- Japan
- Prior art keywords
- oil temperature
- automatic transmission
- line pressure
- low
- low oil
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 8
- 239000003921 oil Substances 0.000 description 33
- 238000010586 diagram Methods 0.000 description 2
- 239000010718 automatic transmission oil Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Control Of Transmission Device (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、電子制御式自動変速機における低油温時のＮ
からＤ或いはＮからＲへの係合遅れを防止する低油温時
の摩擦係合要素の制御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is directed to reducing N at low oil temperatures in electronically controlled automatic transmissions.
The present invention relates to a method of controlling frictional engagement elements at low oil temperatures to prevent a delay in engagement from D to D or from N to R.
（従来の技術）
従来、車両は、低油温時にはトルコン油の粘性が高くな
り、クラッチ等の係合時間が長くなることが一般的に知
られている。特に、“Ｎ−Ｄ”及び“Ｎ−Ｒ”等のいわ
ゆるガレージシフトの場合には、−１にアイドル状態で
あり、エンジン回転数も低く、オイルポンプの吐出量も
少ないため、その不具合が顕著となり、応答性が悪く、
ドライバに不快感を与えるといった問題があった。(Prior Art) Conventionally, it is generally known that when the oil temperature of a vehicle is low, the viscosity of torque converter oil becomes high, and the engagement time of a clutch or the like increases. In particular, in the case of so-called garage shifts such as "N-D" and "N-R", the problem is noticeable because the idle state is at -1, the engine speed is low, and the oil pump output is small. This results in poor responsiveness.
There was a problem that it caused discomfort to the driver.
（発明が解決しようとする課題）
本発明は、このような低油温時におけるトルコン油の粘
性が高くなることによる不具合を除去し、低油温時にお
いても円滑な動作を行い得る電子制御式自動変速機及び
その低油温時の摩擦係合要素の制御方法を提供すること
を目的とする。(Problems to be Solved by the Invention) The present invention eliminates the problems caused by the increased viscosity of torque converter oil at low oil temperatures, and provides an electronically controlled system that can operate smoothly even at low oil temperatures. An object of the present invention is to provide an automatic transmission and a method for controlling frictional engagement elements thereof when the oil temperature is low.
（課題を解決するための手段）
本発明は、上記問題点を解決するため、電子制御式自動
変速機において、自動変速機の油温センサと、該油温セ
ンサからの油温↑’ｆｆ ？９に基づいてライン圧を設
定する手段と、該ライン圧の制御により低油温時の摩擦
係合要素の係合遅れを防止する手段とを設けるようにし
たものである。(Means for Solving the Problems) In order to solve the above problems, the present invention provides an electronically controlled automatic transmission including an oil temperature sensor of the automatic transmission and an oil temperature ↑'ff? from the oil temperature sensor. 9, and a means for controlling the line pressure to prevent a delay in engagement of the friction engagement element at low oil temperature.
また、電子制御式自動変速機の低油温時の摩擦係合要素
の制御方法において、自動変速機の油温センサからの情
報を得て、該情報に基づいてライン圧を設定し、該ライ
ン圧の制御により低油温時の摩擦係合要素の係合遅れを
防止するようにしたものである。In addition, in a method for controlling frictional engagement elements of an electronically controlled automatic transmission at low oil temperature, information is obtained from an oil temperature sensor of the automatic transmission, line pressure is set based on the information, and the line pressure is set based on the information. By controlling the pressure, a delay in engagement of the friction engagement element at low oil temperatures is prevented.
（作用及び発明の効果）
本発明によれば、上記のように、リニアソレノイド等の
油圧制御用ソレノイドを使って、クラッチ、ブレーキ等
の摩擦係合要素の係合圧の基となるライン圧を、低油温
時においては常温時よりも高く設定することができ、そ
の保合時間を常温時と同等になし、低温時における快適
な動作を行うことができる。(Operation and Effects of the Invention) According to the present invention, as described above, a hydraulic control solenoid such as a linear solenoid is used to control the line pressure that is the basis of the engagement pressure of frictional engagement elements such as clutches and brakes. When the oil temperature is low, it can be set higher than when the oil temperature is at room temperature, and the retention time can be made equal to that at room temperature, allowing comfortable operation at low temperatures.
（実施例）
以下、本発明の実施例について図面を参照しながら詳細
に説明する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図は本発明の実施例を示す電子制御式自動変速機の
制御装置の構成図、第２図は本発明の電子制御式自動変
速機の低油温時の摩擦係合要素の制御方法を示すフロー
チャートである。FIG. 1 is a configuration diagram of a control device for an electronically controlled automatic transmission according to an embodiment of the present invention, and FIG. 2 is a method for controlling frictional engagement elements at low oil temperature in an electronically controlled automatic transmission according to the present invention. It is a flowchart which shows.
第１図において、１はスロットルセンサ、２は車速セン
サ、３は自動変速機の油温センサ、４は第１の変速用ソ
レノイド、５は第２の変速用ソレノイド、１０は電子制
御装置、１１はＣＰＵ （中央処理装置）、１２はＲＯ
Ｍ、１３はＲＡＭ、１４〜１６は入力処理回路、１７は
入力インタフェース回路、１日は入出力インクフェース
回路、１９は第１の変速用ソレノイド４の駆動回路、２
０は第１の変速用ソレノイド４のモニタ回路、２１は第
２の変速用ソレノイド５の駆動回路、２２は第２の変速
用ソレノイド５のモニタ回路、２３は油圧制御用ソレノ
イドの駆動回路、３０はセカンダリバルブ、３１はプラ
イマリバルブ、３２はリリーフバルブ、３３はソレノイ
ドモジュレータバルブ、３４はリニアソレノイドバルブ
である。In FIG. 1, 1 is a throttle sensor, 2 is a vehicle speed sensor, 3 is an automatic transmission oil temperature sensor, 4 is a first shift solenoid, 5 is a second shift solenoid, 10 is an electronic control unit, 11 is CPU (Central Processing Unit), 12 is RO
M, 13 is a RAM, 14 to 16 are input processing circuits, 17 is an input interface circuit, 1 is an input/output ink face circuit, 19 is a drive circuit for the first speed change solenoid 4, 2
0 is a monitor circuit for the first shift solenoid 4, 21 is a drive circuit for the second shift solenoid 5, 22 is a monitor circuit for the second shift solenoid 5, 23 is a drive circuit for the hydraulic control solenoid, 30 31 is a secondary valve, 32 is a relief valve, 33 is a solenoid modulator valve, and 34 is a linear solenoid valve.
第１図に示すように、油温センサ３から電子制御装置１
０へ油温情報を取り込む。そこで、油温が低温の場合に
は、油圧制御用ソレノイドの駆動回路２３を介してリニ
アソレノイドバルブ３４を動作させ、クラッチ、ブレー
キ等の摩擦係合要素の係合圧の基となるライン圧を、低
油温時においては常温時よりも高く設定することにより
、低温時における保合時間を常温時と同等にして、快適
な操作を行うようにしたものである。As shown in FIG. 1, from the oil temperature sensor 3 to the electronic control device 1,
Import oil temperature information into 0. Therefore, when the oil temperature is low, the linear solenoid valve 34 is operated via the hydraulic control solenoid drive circuit 23 to reduce the line pressure that is the basis of the engagement pressure of frictional engagement elements such as clutches and brakes. By setting the oil temperature higher when the oil temperature is low than when it is at room temperature, the holding time at low temperatures is made equal to that at room temperature, so that comfortable operation can be performed.
次に、本発明の電子制御式自動変速機の低油温時の摩擦
係合要素の制御方法を第２図を参照しながら説明する。Next, a method of controlling the frictional engagement elements of the electronically controlled automatic transmission of the present invention at low oil temperature will be explained with reference to FIG.
■まず、既に低温時ライン圧アップ状態か否かを判断す
る。■First, it is determined whether or not the line pressure is already increased at low temperature.
■既に低温時ライン圧アップ状態である場合には油温が
所定温度Ｗ’Ｃ（例えば２０’Ｃ）未満であるか否かを
判断する。(2) If the line pressure is already increased at low temperature, it is determined whether the oil temperature is less than a predetermined temperature W'C (for example, 20'C).
■油温が所定温度Ｗ′Ｃ未満である場合には車速か所定
速度ＸＫｍ／ｈ（例えば７Ｋｍ／ｈ）未満であるか否か
を判断する。(2) If the oil temperature is less than a predetermined temperature W'C, it is determined whether the vehicle speed is less than a predetermined speed XKm/h (for example, 7Km/h).
■前記ステップ■及びステップ■においてＮＯの場合に
は、低温時ライン圧アンプフラグをクリアする。(2) If NO in step (2) and step (2), clear the line pressure amplifier flag at low temperature.
■前記ステップ■において、既に低温時ライン圧アンプ
状態でない場合には、油温が所定温度Ｙ’Ｃ（例えば１
０°Ｃ）未満であるか否かを判断する。■In step ■, if the oil temperature is not already in the low temperature line pressure amplifier state, the oil temperature is set to a predetermined temperature Y'C (for example, 1
0°C).
■油温が所定温度Ｙ’Ｃ未満である場合には、車速が所
定速度ＺＫｍ／ｈ（例えば５Ｋｍ／ｈ）未満であるか否
かを判断する。(2) If the oil temperature is less than a predetermined temperature Y'C, it is determined whether the vehicle speed is less than a predetermined speed ZKm/h (for example, 5Km/h).
■前記ステップ■或いは前記ステップ■においてＹＥＳ
の場合には、低温時ライン圧アップフラグ及び低温時ラ
イン圧アップデータをセントする。■ YES in step ■ or step ■ above
In this case, the line pressure up flag at low temperature and the line pressure up data at low temperature are sent.
また、本発明において、特に問題となるＮからＤ或いは
ＮからＲだけに注目してライン圧をアップさせるため、
車速信号により、停止している場合のみライン圧制御を
行っている。これは、他の通常変速時にＮからＤ或いは
ＮからＲと同じようにライン圧をアップさせると、アン
プシフトした場合のショックが問題となるからであり、
それが問題とならない場合は、全車速領域においてライ
ン圧をアンプするようにしてもよい。In addition, in the present invention, in order to increase the line pressure by focusing only on N to D or N to R, which are particularly problematic,
Line pressure is controlled only when the vehicle is stopped using the vehicle speed signal. This is because if you increase the line pressure in the same way as from N to D or N to R during other normal gear shifts, the shock caused by the amplifier shift will become a problem.
If this is not a problem, the line pressure may be amplified in the entire vehicle speed range.
このように構成することにより、第３図に示すように、
従来の場合、つまりライン圧をアップさせない場合は、
ＮからＤにシフトする際に一２０°Ｃ下で２．１秒を要
していたものが、本発明によれば、１．６Ｋｇ／ｃ−の
ライン圧アップにより、ライン圧を５．６ Ｋｇ／ｃｄ
とした場合、従来のものと同条件下で１．０５秒を要す
るのみである。With this configuration, as shown in Figure 3,
In the conventional case, that is, when the line pressure is not increased,
It used to take 2.1 seconds at -20°C to shift from N to D, but according to the present invention, the line pressure can be increased to 5.6 kg/c by increasing the line pressure by 1.6 kg/c-. Kg/cd
In this case, it takes only 1.05 seconds under the same conditions as the conventional method.
なお、本発明は上記実施例に限定されるものではなく、
本発明の趣旨に基づき種々の変形が可能であり、それら
を本発明の範囲から排除するものではない。Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
第１図は本発明の実施例を示す電子制御式自動変速機の
制御装置の構成図、第２図は本発明の電子制御式自動変
速機の低油温時の摩擦係合要素の制御方法を示すフロー
チャート、第３図は低油温時の摩擦係合要素の係合遅れ
状態を示す図である。
ｌ・・・スロントルセンサ、２・・・車速センサ、３・
・・自動変速機の油温センサ、４・・・第１の変速用ソ
レノイド、５・・・第２の変速用ソレノイド、１０・・
・電子制御装置、１１・・・ＣＰＵ （中央処理装置）
、１２・・・ＲＯＭ、１３・・・ＲＡＭ、１４〜１６・
・・入力処理回路、】７・・・入力インタフェース回路
、１８・・・入出力インタフェース回路、１９・・・第
１の変速用ソレノイドの駆動回路、２０・・・第１の変
速用ソレノイドのモニタ回路、２１・・・第２の変速用
ソレノイドの駆動回路、２２・・・第２の変速用ソレノ
イドのモニタ回路、２３・・・油圧制御用ソレノイドの
駆動回路、３０・・・セカンダリバルブ、３１・・・プ
ライマリバルブ、３２・・・リリーフバルブ、３３・・
・ソレノイドモジュレータバルブ、３４・・・リニアソ
レノイドバルブ。
特許出願人 アイシン・エイ・ダブリュ株式会社代理人
弁理士 清 水 守 （外１名）第
図FIG. 1 is a configuration diagram of a control device for an electronically controlled automatic transmission according to an embodiment of the present invention, and FIG. 2 is a method for controlling frictional engagement elements at low oil temperature in an electronically controlled automatic transmission according to the present invention. FIG. 3 is a flowchart showing a state in which the engagement of the frictional engagement element is delayed when the oil temperature is low. l...Throntl sensor, 2...Vehicle speed sensor, 3.
... Oil temperature sensor of automatic transmission, 4... First shift solenoid, 5... Second shift solenoid, 10...
・Electronic control unit, 11...CPU (central processing unit)
, 12...ROM, 13...RAM, 14-16.
... Input processing circuit, ]7... Input interface circuit, 18... Input/output interface circuit, 19... Drive circuit for first shift solenoid, 20... Monitor for first shift solenoid Circuit, 21... Drive circuit for second shift solenoid, 22... Monitor circuit for second shift solenoid, 23... Drive circuit for hydraulic control solenoid, 30... Secondary valve, 31 ...Primary valve, 32...Relief valve, 33...
・Solenoid modulator valve, 34...Linear solenoid valve. Patent applicant: Aisin AW Co., Ltd. Agent: Patent attorney: Mamoru Shimizu (1 other person) Figure
Claims (2)
油温情報に基づいてライン圧を設定する手段と、該ライ
ン圧の制御により低油温時の摩擦係合要素の係合遅れを
防止する手段とを具備する電子制御式自動変速機。(1) An oil temperature sensor of an automatic transmission, means for setting line pressure based on oil temperature information from the oil temperature sensor, and engagement of a frictional engagement element at low oil temperature by controlling the line pressure. An electronically controlled automatic transmission comprising means for preventing delay.
報に基づいてライン圧を設定し、該ライン圧の制御によ
り低油温時の摩擦係合要素の係合遅れを防止する電子制
御式自動変速機の低油温時の摩擦係合要素の制御方法。(2) Obtain information from the oil temperature sensor of the automatic transmission, set line pressure based on the information, and prevent delay in engagement of the frictional engagement element at low oil temperature by controlling the line pressure. A method for controlling frictional engagement elements in electronically controlled automatic transmissions at low oil temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18960488A JPH0242251A (en) | 1988-07-30 | 1988-07-30 | Electronically controlled automatic transmission and control method for its friction engagement element at low oil temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18960488A JPH0242251A (en) | 1988-07-30 | 1988-07-30 | Electronically controlled automatic transmission and control method for its friction engagement element at low oil temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0242251A true JPH0242251A (en) | 1990-02-13 |
Family
ID=16244092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18960488A Pending JPH0242251A (en) | 1988-07-30 | 1988-07-30 | Electronically controlled automatic transmission and control method for its friction engagement element at low oil temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0242251A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0473457A (en) * | 1990-07-11 | 1992-03-09 | Nissan Motor Co Ltd | Hydraulic pressure controller for automatic transmission |
| JPH05172231A (en) * | 1991-07-31 | 1993-07-09 | Mitsubishi Motors Corp | Shift control device for continuously variable transmission |
| US6432019B1 (en) | 1999-09-30 | 2002-08-13 | Jatco Transtechnology Ltd. | Hydraulic circuit for toroidal continuous variable transmission |
| US6729987B2 (en) | 2001-07-31 | 2004-05-04 | Toyota Jidosha Kabushiki Kaisha | Apparatus for controlling vehicle automatic transmission |
| US7003388B2 (en) | 2003-03-28 | 2006-02-21 | Toyota Jidosha Kabushiki Kaisha | Control apparatus and method for lock-up clutch of vehicle |
| US10197117B2 (en) | 2016-01-11 | 2019-02-05 | Cnh Industrial America Llc | Temperature-based clutch protection from centrifugal head pressure inhibiting clutch disengagement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63140149A (en) * | 1986-12-02 | 1988-06-11 | Japan Autom Transmission Co Ltd | Hydraulic controller for automatic transmission |
-
1988
- 1988-07-30 JP JP18960488A patent/JPH0242251A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63140149A (en) * | 1986-12-02 | 1988-06-11 | Japan Autom Transmission Co Ltd | Hydraulic controller for automatic transmission |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0473457A (en) * | 1990-07-11 | 1992-03-09 | Nissan Motor Co Ltd | Hydraulic pressure controller for automatic transmission |
| JPH05172231A (en) * | 1991-07-31 | 1993-07-09 | Mitsubishi Motors Corp | Shift control device for continuously variable transmission |
| US6432019B1 (en) | 1999-09-30 | 2002-08-13 | Jatco Transtechnology Ltd. | Hydraulic circuit for toroidal continuous variable transmission |
| DE10047855B4 (en) * | 1999-09-30 | 2006-04-06 | Jatco Ltd, Fuji | Hydraulic circuit for stepless Toroidgetriebe |
| US6729987B2 (en) | 2001-07-31 | 2004-05-04 | Toyota Jidosha Kabushiki Kaisha | Apparatus for controlling vehicle automatic transmission |
| US7003388B2 (en) | 2003-03-28 | 2006-02-21 | Toyota Jidosha Kabushiki Kaisha | Control apparatus and method for lock-up clutch of vehicle |
| US10197117B2 (en) | 2016-01-11 | 2019-02-05 | Cnh Industrial America Llc | Temperature-based clutch protection from centrifugal head pressure inhibiting clutch disengagement |
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