JPH0242245A - Failsafe control method for oil temperature sensor of automatic transmission and electronic control device therefor - Google Patents
Failsafe control method for oil temperature sensor of automatic transmission and electronic control device thereforInfo
- Publication number
- JPH0242245A JPH0242245A JP63189609A JP18960988A JPH0242245A JP H0242245 A JPH0242245 A JP H0242245A JP 63189609 A JP63189609 A JP 63189609A JP 18960988 A JP18960988 A JP 18960988A JP H0242245 A JPH0242245 A JP H0242245A
- Authority
- JP
- Japan
- Prior art keywords
- temperature sensor
- temp
- oil temperature
- sensor
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 40
- 230000002950 deficient Effects 0.000 claims description 6
- 239000010718 automatic transmission oil Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 3
- BWSQKOKULIALEW-UHFFFAOYSA-N 2-[2-[4-fluoro-3-(trifluoromethyl)phenyl]-3-[2-(piperidin-3-ylamino)pyrimidin-4-yl]imidazol-4-yl]acetonitrile Chemical compound FC1=C(C=C(C=C1)C=1N(C(=CN=1)CC#N)C1=NC(=NC=C1)NC1CNCCC1)C(F)(F)F BWSQKOKULIALEW-UHFFFAOYSA-N 0.000 description 1
- YZSCPLGKKMSBMV-UHFFFAOYSA-N 5-fluoro-4-(8-fluoro-4-propan-2-yl-2,3-dihydro-1,4-benzoxazin-6-yl)-N-[5-(1-methylpiperidin-4-yl)pyridin-2-yl]pyrimidin-2-amine Chemical compound FC=1C(=NC(=NC=1)NC1=NC=C(C=C1)C1CCN(CC1)C)C1=CC2=C(OCCN2C(C)C)C(=C1)F YZSCPLGKKMSBMV-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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の油温センサのフェー
ルセーフ制御方法及びその自動変速機の電子制御装置に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fail-safe control method for an oil temperature sensor of an electronically controlled automatic transmission and an electronic control device for the automatic transmission.
（従来の技術）
従来より電子制御式自動変速機においては、自動変速機
用油（トルコン油）の温度を検出して、それに基づいて
変速及びライン圧の制御が行われるように構成されてい
る。(Prior Art) Conventionally, electronically controlled automatic transmissions have been configured to detect the temperature of automatic transmission oil (torque converter oil) and control gear shifts and line pressure based on the detected temperature. .
その場合、油温の検出手段としては、ある温度に達する
とオン・オフするようなスイッチ形式のものから、温度
により抵抗値などの電気的特性が連続して変化するアナ
ログ形式のものまで多種多様存在している。In that case, there are a wide variety of means for detecting oil temperature, ranging from switch-type ones that turn on and off when a certain temperature is reached, to analog-type ones whose electrical characteristics such as resistance value continuously change depending on the temperature. Existing.
その中で、特に制御上低温から高温まで（例えば−５０
〜１６０°Ｃ）の広い範囲にわたって連続的に油温を検
出する必要がある場合に使用される手段として、サーミ
スタ式〇油温センサがある。Among them, especially from low temperature to high temperature (for example -50
A thermistor-type oil temperature sensor is used when it is necessary to continuously detect oil temperature over a wide range (160° C.).
（発明が解決しようとする課題）
しかしながら、上記のようにサーミスタ式の油温センサ
を使って広い温度範囲にわたって連続的に温度を検出す
る時、極低温の場合と、油温センサ自体又は油温センサ
の配線が断線したような場合との区別を油温センサの出
力のみに基づいて制御装置によって判別することは困難
であるといった問題があった。(Problem to be Solved by the Invention) However, when a thermistor-type oil temperature sensor is used to continuously detect temperature over a wide temperature range as described above, there are cases where the oil temperature sensor itself or the oil temperature is extremely low. There has been a problem in that it is difficult for the control device to distinguish between cases where the sensor wiring is disconnected based only on the output of the oil temperature sensor.
これは、第３図に示すように、サーミスタの温度特性で
ある抵抗値の変化が、低温側になるに従い指数関数的に
急上昇することに起因する。すなわち、抵抗値Ｒｔ＋＋
＝Ｒｙｕｏ ・ｅｘｐ ｔＢ （１／Ｔ）−（１／
Ｔ、）ｌである。ここで、ＲＡＭ。はＴｏ〔°Ｋ〕にお
けるザーミスタ抵抗、Ｂはサーミスタ定数である。そし
て、第３図に示す極低温状態ａとザーミスタ系統の不良
状態とは区別がつかない。This is because, as shown in FIG. 3, the change in resistance value, which is the temperature characteristic of the thermistor, rapidly increases exponentially as the temperature becomes lower. That is, the resistance value Rt++
=Ryuo ・exp tB (1/T)−(1/
T, )l. Here, RAM. is the thermistor resistance at To [°K], and B is the thermistor constant. Furthermore, it is difficult to distinguish between the extremely low temperature state a shown in FIG. 3 and the defective state of the thermistor system.
そこで、システムとして低温時に、例えば儒温時用ライ
ン圧制御（ライン圧アップ）などの低温の場合のみに動
作させる制御を行っているものであると、油温センサ自
体又は油温センサの配線が断線したような場合は、実際
には常温或いは高温であっても低温時と判断して、それ
に基づき制御を遂行することになり不具合となる。Therefore, if the system is controlled to operate only at low temperatures, such as line pressure control (increased line pressure) at low temperatures, the oil temperature sensor itself or the oil temperature sensor wiring may be damaged. If a wire breaks, even if the temperature is actually room temperature or high temperature, it will be determined that the temperature is low and control will be performed based on that, resulting in a malfunction.
（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に、自動変速機の
油温センサのフェールセーフ制御方法であって、エンジ
ン水温スイッチがオフからオンになったか否かを判断し
、該水温スイッチがオフからオンになった場合には所定
時間経過したが否かを判断し、所定時間経過した場合に
は油温が所定温度以下であるか否かを判断し、該所定温
度以下の状態が継続する場合には油温センサ系統が不良
状態であると判定するようにしたものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a fail-safe control method for an oil temperature sensor of an automatic transmission, which determines whether an engine water temperature switch is turned on from off. If the water temperature switch is turned on from off, determine whether a predetermined time has elapsed, and if the predetermined time has elapsed, determine whether the oil temperature is below a predetermined temperature; If the temperature continues to be below the predetermined temperature, it is determined that the oil temperature sensor system is in a defective state.
また、そのために、自動変速機の電子制御装置において
、油温センサと、エンジン水温センサと、これらのセン
サからの情報を処理する制御装置と、該制御装置に接続
される油圧制御用ソレノイドと、前記エンジン水温セン
サからの情報と油温センサからの情報に基づいて油温セ
ンサ系統の不良状態を検出する手段を設けるようにした
ものである。To this end, the electronic control device for the automatic transmission includes an oil temperature sensor, an engine water temperature sensor, a control device that processes information from these sensors, and a hydraulic control solenoid connected to the control device. Means is provided for detecting a defective state of the oil temperature sensor system based on information from the engine water temperature sensor and information from the oil temperature sensor.
（作用及び発明の効果）
本発明によれば、上記のように構成したので、エンジン
水温が十分上がった状態、つまり、エンジン水温センサ
からエンジン高Ａ （）ＩＯＴ状態）の信号を受けてか
らＴ秒後に、例えば−３０’Ｃ以下の信号が入力されて
いる場合には、油温センサ系統が不良状態、つまり油温
センチ自体の故障や油温センサの配線の断線であると判
断して、低温時制御をやめて常温制御を行うようにする
。(Operations and Effects of the Invention) According to the present invention, since the configuration is as described above, T If, for example, a signal below -30'C is input after seconds, it is determined that the oil temperature sensor system is in a defective state, that is, the oil temperature centimeter itself is malfunctioning or the oil temperature sensor wiring is disconnected. Stop low temperature control and perform normal temperature control.
このように、エンジン水温センサを併用して油温センサ
系統の不良状態の検出を行い、それに基づいて的確な油
温センサのフェールセーフ制御、例えば、低温時に実行
するライン圧アップｔｆｉｌｌ ｊＢを禁止することが
できる。In this way, the engine water temperature sensor is used in combination to detect a malfunction in the oil temperature sensor system, and based on this, accurate fail-safe control of the oil temperature sensor is performed, for example, line pressure increase tfill jB that is executed at low temperatures is prohibited. be able to.
（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自動変速機の電子制御装
置のブロック図、第２図は本発明の実施例を示す自動変
速機の７１１？温センサのフェールセーフ制御方法を示
すフローチャートである。FIG. 1 is a block diagram of an electronic control device of an automatic transmission showing an embodiment of the present invention, and FIG. 2 is a block diagram of an automatic transmission 711 showing an embodiment of the present invention. 3 is a flowchart showing a fail-safe control method for a temperature sensor.
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は油温センサ、４はエンジン水温センサ、５は第
１の変速用ソレノイド、６は第２の変速用ソレノイド、
７は油圧制御用ソレノイド、８は警告装置、１０は電子
制御装置、］１はＣＰＵ（中央処理装置）、１２はメモ
リ、１３はカウンタ、１４乃至１７は入力処理回路、１
８は入力インタフェース回路、１９は人出力インタフェ
ース回路、２０は第１の変速用ソレノイドの駆動回路、
２１は第１の変速用ソレノイドのモニタ回路、２２は第
２の変速用ソレノイドの駆動回路、２３は第２の変速用
ソレノイドのモニタ回路、２４は油圧制御用ソレノイド
の駆動回路、２５は警告装置駆動回路、２６は演算タイ
マ回路である。In FIG. 1, 1 is a throttle sensor, 2 is a vehicle speed sensor, 3 is an oil temperature sensor, 4 is an engine water temperature sensor, 5 is a first shift solenoid, 6 is a second shift solenoid,
7 is a hydraulic control solenoid, 8 is a warning device, 10 is an electronic control device,] 1 is a CPU (central processing unit), 12 is a memory, 13 is a counter, 14 to 17 are input processing circuits, 1
8 is an input interface circuit, 19 is a human output interface circuit, 20 is a drive circuit for the first shift solenoid,
21 is a monitor circuit for the first shift solenoid, 22 is a drive circuit for the second shift solenoid, 23 is a monitor circuit for the second shift solenoid, 24 is a drive circuit for the hydraulic control solenoid, and 25 is a warning device. The drive circuit 26 is an arithmetic timer circuit.
次に、自動変速機の油温センサのフェールセーフ制御方
法を第２図を参照しながら説明する。Next, a fail-safe control method for an oil temperature sensor of an automatic transmission will be explained with reference to FIG.
■エンジン水温センサ（スイッチ）がオフ（エンジン水
温低温）からオン（エンジン水温高温）になったか否か
をチエツクする。■Check whether the engine water temperature sensor (switch) has changed from off (engine water temperature is low) to on (engine water temperature is high).
■エンジン水温センサ（スイッチ）がオフからオンにな
った時点からタイマ（演算タイマ回路２５）が始動し、
所定時間経過したか否かをチエツクする。■The timer (calculation timer circuit 25) starts from the moment the engine water temperature sensor (switch) turns from off to on.
Check whether a predetermined time has elapsed.
■前記ステップ■において、エンジン水温センサ（スイ
ッチ）がオフからオンになっていない場合は、タイマを
クリアする。(2) In step (2) above, if the engine water temperature sensor (switch) has not been turned on from off, clear the timer.
■前記ステップ■において油温が所定温度Ａ（例えば−
３０’Ｃ）以下であるか否かをチエツクする。■In step ■, the oil temperature is set to a predetermined temperature A (for example -
30'C) or less.
■オーブンカウンタＣ０により所定油温Ａの継続を確認
する。■ Confirm that the predetermined oil temperature A continues by checking the oven counter C0.
■前記ステップ■において油温が所定温度Ａ超過である
場合には、オープンカウンタＣ０をクリアする。(2) If the oil temperature exceeds the predetermined temperature A in step (2), the open counter C0 is cleared.
■オーブンカウンタＣ６が所定数（オープン故障確定の
値）Ｂ以上か否かをチエツクする。(2) Check whether the oven counter C6 is greater than or equal to a predetermined number (value for determining open failure) B.
■オープンカウンタＣ０が所定数（オープン故障確定の
値）Ｂ以上の場合には、油温センサオープン故障と判断
し、フェールセーフ制御を行う。(2) If the open counter C0 is equal to or greater than a predetermined number (value for determining an open failure) B, it is determined that the oil temperature sensor has an open failure, and fail-safe control is performed.
このように、エンジン水温センサからの情報と油温セン
サからの情報に基づいて油温センサ系統の不良状態を検
出するようにしたので、油温センサ系統の不良状態時に
おける低温時のライン圧アップ制御を回避し、フェール
セーフ制御を行うことができる。In this way, a malfunction in the oil temperature sensor system is detected based on information from the engine water temperature sensor and information from the oil temperature sensor, so line pressure increases at low temperatures when the oil temperature sensor system is malfunctioning. Control can be avoided and fail-safe control can be performed.
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自動変速機の電子制御装
置のブロック図、第２図は本発明の実施例を示す自動変
速機の油温センサのフェールセーフ制御方法を示すフロ
ーチャート、第３図は油温センサの動作特性図である。
１・・・スロットルセンサ、２・・・車速センサ、３・
・・油温センサ、４・・・エンジン水温センサ、５・・
・第１の変速用ソレノイド、６・・・第２の変速用ソレ
ノイド、７・・・油圧制御用ソレノイド、８・・・警告
装置、１０・・・電子制御装置、１１・・・ＣＰＵ （
中央処理装置）、１２・・・メモリ、１３・・・カウン
タ、１４〜１７・・・入力処理回路、１８・・・入力イ
ンタフェース回路、１９・・・入出力インタフェース回
路、２０・・・第１の変速用ソレノイドの駆動回路、２
１・・・第１の変速用ソレノイドのモニタ回路、２２・
・・第２の変速用ソレノイドの駆動回路、２３・・・第
２の変速用ソレノイドのモニタ回路、２４・・・油圧制
御用ソレノイドの駆動回路、２５・・・警告装置駆動回
路、２６・・・演算タイマ回路。
怖
ト
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
第
図
一、ＳＯ’ｃ
１６０’（。FIG. 1 is a block diagram of an electronic control device for an automatic transmission according to an embodiment of the present invention, and FIG. 2 is a flow chart showing a fail-safe control method for an oil temperature sensor of an automatic transmission according to an embodiment of the present invention. FIG. 3 is a diagram showing the operating characteristics of the oil temperature sensor. 1...Throttle sensor, 2...Vehicle speed sensor, 3.
...Oil temperature sensor, 4...Engine water temperature sensor, 5...
・First shift solenoid, 6... Second shift solenoid, 7... Hydraulic control solenoid, 8... Warning device, 10... Electronic control unit, 11... CPU (
central processing unit), 12... memory, 13... counter, 14-17... input processing circuit, 18... input interface circuit, 19... input/output interface circuit, 20... first Drive circuit for the speed change solenoid, 2
1... first shift solenoid monitor circuit, 22.
... Drive circuit for the second shift solenoid, 23... Monitor circuit for the second shift solenoid, 24... Drive circuit for the hydraulic control solenoid, 25... Warning device drive circuit, 26... - Arithmetic timer circuit. Patent applicant: Aisin AW Co., Ltd. Agent: Patent attorney: Mamoru Shimizu (1 other person) Figure 1, SO'c 160' (.
Claims (2)
か否かを判断し、該水温スイッチがオフからオンになっ
た場合には所定時間経過したか否かを判断し、所定時間
経過した場合には油温が所定温度以下であるか否かを判
断し、該所定温度以下の状態が継続する場合には油温セ
ンサ系統が不良状態であると判定する自動変速機の油温
センサのフェールセーフ制御方法。(1) Determine whether the engine water temperature switch has been turned on from off, and if the water temperature switch has been turned on from off, determine whether a predetermined time has elapsed, and if the predetermined time has elapsed, Fail-safe control of the oil temperature sensor of an automatic transmission that determines whether the oil temperature is below a predetermined temperature and determines that the oil temperature sensor system is in a defective state if the oil temperature continues to be below the predetermined temperature. Method.
サと、これらのセンサからの情報を処理する制御装置と
、該制御装置に接続される油圧制御用ソレノイドとを含
み、エンジン水温センサからの情報と油温センサからの
情報に基づいて油温センサ系統の不良状態を検出する手
段を具備する自動変速機の電子制御装置。(2) Includes an automatic transmission oil temperature sensor, an engine water temperature sensor, a control device that processes information from these sensors, and a hydraulic control solenoid connected to the control device, and includes a hydraulic control solenoid that processes information from the engine water temperature sensor. An electronic control device for an automatic transmission comprising means for detecting a defective state of an oil temperature sensor system based on information and information from an oil temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63189609A JP2726056B2 (en) | 1988-07-30 | 1988-07-30 | Fail-safe control method for oil temperature sensor of automatic transmission and electronic control device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63189609A JP2726056B2 (en) | 1988-07-30 | 1988-07-30 | Fail-safe control method for oil temperature sensor of automatic transmission and electronic control device therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0242245A true JPH0242245A (en) | 1990-02-13 |
| JP2726056B2 JP2726056B2 (en) | 1998-03-11 |
Family
ID=16244172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63189609A Expired - Fee Related JP2726056B2 (en) | 1988-07-30 | 1988-07-30 | Fail-safe control method for oil temperature sensor of automatic transmission and electronic control device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2726056B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19504650C1 (en) * | 1995-02-13 | 1996-04-04 | Daimler Benz Ag | Temperature detection device for motor vehicle automatic transmission gearbox |
| DE19855971B4 (en) * | 1998-12-04 | 2007-01-04 | Zf Friedrichshafen Ag | Method for monitoring a temperature sensor |
| JP2010151282A (en) * | 2008-12-26 | 2010-07-08 | Honda Motor Co Ltd | Malfunction determining device of working oil temperature sensor |
| JP2014029169A (en) * | 2012-07-31 | 2014-02-13 | Suzuki Motor Corp | Failure diagnosis control device for oil temperature sensor |
-
1988
- 1988-07-30 JP JP63189609A patent/JP2726056B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19504650C1 (en) * | 1995-02-13 | 1996-04-04 | Daimler Benz Ag | Temperature detection device for motor vehicle automatic transmission gearbox |
| DE19855971B4 (en) * | 1998-12-04 | 2007-01-04 | Zf Friedrichshafen Ag | Method for monitoring a temperature sensor |
| JP2010151282A (en) * | 2008-12-26 | 2010-07-08 | Honda Motor Co Ltd | Malfunction determining device of working oil temperature sensor |
| JP2014029169A (en) * | 2012-07-31 | 2014-02-13 | Suzuki Motor Corp | Failure diagnosis control device for oil temperature sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2726056B2 (en) | 1998-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4459965B2 (en) | Oil temperature sensor defect detection method for automatic transmission | |
| KR19980080830A (en) | Device for controlling and / or adjusting the driving process of the vehicle | |
| CA2447001A1 (en) | Method for detecting broken valve stem | |
| US5027647A (en) | Sensor malfunction diagnostic system for automatic automotive transmission | |
| JPH01172665A (en) | Fail-safe controller for electronic control type automatic transmission | |
| JPH0242245A (en) | Failsafe control method for oil temperature sensor of automatic transmission and electronic control device therefor | |
| KR100701486B1 (en) | Control apparatus and self-diagnostic method for electronic control system | |
| WO1999057693A1 (en) | Sensor device providing indication of device health | |
| JPS63133202A (en) | Vehicle controller | |
| KR950009201A (en) | Self Diagnosis Device and Method of Refrigerator | |
| JPH1073159A (en) | Failure diagnosis device of automatic transmission having torque converter | |
| JPH08293414A (en) | Trouble detecting device for solenoid | |
| JP3680593B2 (en) | High-temperature runaway prevention device for automatic transmission control unit | |
| JPH08338296A (en) | Control device for vehicle | |
| KR102037392B1 (en) | Method for controlling gear actuator select solenoid | |
| KR950017345A (en) | Fault judgment device of automatic transmission and its control method | |
| JPH09198147A (en) | Temperature controller | |
| JPH04157260A (en) | Controller for automatic transmission | |
| JP3278489B2 (en) | Pulse input detector | |
| JPS61127010A (en) | Device controller | |
| KR970044922A (en) | Water temperature diagnosis device and control method when water temperature sensor breaks down | |
| KR100244804B1 (en) | Multi-input/output circuit for multi-sense input/output | |
| JP2576455B2 (en) | Controller and control system using the same | |
| KR20180067341A (en) | Position Control Method for Position Detecting Error | |
| JPH109650A (en) | Control device of air conditioning apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |