JP3334943B2 - Automatic transmission vehicle speed sensor failure detection method - Google Patents
Automatic transmission vehicle speed sensor failure detection methodInfo
- Publication number
- JP3334943B2 JP3334943B2 JP12501093A JP12501093A JP3334943B2 JP 3334943 B2 JP3334943 B2 JP 3334943B2 JP 12501093 A JP12501093 A JP 12501093A JP 12501093 A JP12501093 A JP 12501093A JP 3334943 B2 JP3334943 B2 JP 3334943B2
- Authority
- JP
- Japan
- Prior art keywords
- vehicle speed
- speed sensor
- automatic transmission
- failure detection
- failure
- 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 - Lifetime
Links
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Transmission Device (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動変速機の車速セン
サ故障検知方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a failure of a vehicle speed sensor of an automatic transmission.
【０００２】[0002]
【従来の技術】従来の自動変速機の車速センサ故障検知
方法は、特開昭６１−２１４５４号公報に示されるよう
に、機関回転数が所定値以上でかつ制動装置が作動して
いないときに車速センサの故障の検知を行う。2. Description of the Related Art As described in Japanese Patent Application Laid-Open No. 61-21454, a conventional method for detecting a failure of a vehicle speed sensor of an automatic transmission is performed when the engine speed is equal to or higher than a predetermined value and a braking device is not operating. Detects a failure of the vehicle speed sensor.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の自動変速機の車速センサ故障検知方法では、制動装
置が作動していないときに車速センサの故障検知を行
う。このため、トラクションコントロールシステム（Ｔ
ＣＳ）やアンチロックブレーキシステム（ＡＢＳ）など
を搭載している場合、制動装置が作動していないときに
は故障検知が行われる。しかし、ＴＣＳの作動中は、車
速センサによって検出される車速値が異常に大きくなっ
たり、ＡＢＳ作動中は、車速値が異常に小さくなったり
するため、これらの作動中に車速センサの故障検知を行
うと、車速センサが故障していないにもかかわらず、故
障していると検知してフェイルセーフ機能が働く可能性
がある。本発明は、このような課題を解決するためのも
のである。However, in the above-described conventional method for detecting a vehicle speed sensor failure of an automatic transmission, the failure detection of the vehicle speed sensor is performed when the braking device is not operating. For this reason, the traction control system (T
In the case where a CS), an anti-lock brake system (ABS), or the like is mounted, failure detection is performed when the braking device is not operating. However, during the operation of the TCS, the vehicle speed value detected by the vehicle speed sensor becomes abnormally large, and during the ABS operation, the vehicle speed value becomes abnormally small. If this is done, there is a possibility that the failure is detected and the fail-safe function is activated even though the vehicle speed sensor has not failed. The present invention is to solve such a problem.
【０００４】[0004]
【課題を解決するための手段】本発明は、ＴＣＳやＡＢ
Ｓの作動中には、車速センサの故障検知を行わないよう
にすることにより、上記課題を解決する。すなわち、本
発明の自動変速機の車速センサ故障検知方法は、車両の
駆動力及び制動力の両方又はいずれか一方を運転状況に
応じて自動的に制御する駆動状態制御手段と、車速セン
サの故障を検知する車速センサ故障検知手段と、を有す
るものにおいて、駆動状態制御手段は、トラクションコ
ントロールシステム（ＴＣＳ）やアンチロックブレーキ
システム（ＡＢＳ）であり、駆動状態制御手段が作動中
は、車速センサ故障検知手段において車速センサの故障
検知を行わない、ことを特徴とする。SUMMARY OF THE INVENTION The present invention relates to a TCS or AB
The above problem is solved by not performing the failure detection of the vehicle speed sensor during the operation of S. In other words, the vehicle speed sensor failure detection method for an automatic transmission according to the present invention includes a driving state control unit that automatically controls both or one of a driving force and a braking force of a vehicle according to a driving situation; in those with a vehicle speed sensor failure detecting means for detecting a driving state control means, the traction co
Control system (TCS) and anti-lock brake
The system (ABS) is characterized in that the vehicle speed sensor failure detection means does not detect the failure of the vehicle speed sensor while the drive state control means is operating.
【０００５】[0005]
【作用】ＴＣＳやＡＢＳから送信される信号により、こ
れらが作動中であることを検知して、これらが作動中の
間は、車速センサの故障検知を行わないようにする。こ
れにより、ＴＣＳの作動中に車速センサにより検出され
る異常に大きな車速値や、ＡＢＳの作動中に車速センサ
により検出される異常に小さな車速値によって、車速セ
ンサが故障であると判断されることがないので、誤判断
をなくすことができる。According to a signal transmitted from the TCS or the ABS, it is detected that they are operating, and during these operations, the failure detection of the vehicle speed sensor is not performed. As a result, the vehicle speed sensor is determined to be malfunctioning due to an abnormally large vehicle speed value detected by the vehicle speed sensor during the operation of the TCS or an abnormally small vehicle speed value detected by the vehicle speed sensor during the operation of the ABS. Since there is no erroneous judgment, misjudgment can be eliminated.
【０００６】[0006]
【実施例】図１に本発明の実施例を示す。各車輪１０、
１２、１４及び１６には、それぞれ車輪回転センサ１
８、２０、２２及び２４が取り付けられており、各車輪
１０、１２、１４及び１６の回転がそれぞれ検出され
る。車輪回転センサ１８、２０、２２及び２４は、それ
ぞれＴＣＳ（トラクションコントロールシステム）・Ａ
ＢＳ（アンチロックブレーキシステム）電子制御装置２
６に電気的に接続されている。ＴＣＳ・ＡＢＳ電子制御
装置２６は、これに入力される車輪回転センサ１８、２
０、２２及び２４の検出値に基づいて、ＴＣＳ又はＡＢ
Ｓを作動させる。ＴＣＳ・ＡＢＳ電子制御装置２６は、
自動変速機制御装置２８に電気的に接続されており、こ
れに制御信号を入力する。自動変速機制御装置２８に
は、エンジン回転数信号Ｎｅやギアポジション信号ＧＰ
も入力される。自動変速機３０には、車速を検出する車
速センサ３２が取り付けられている。車速センサ３２は
自動変速機制御装置２８に電気的に接続されており、検
出した車速値を自動変速機制御装置２８に送信する。自
動変速機制御装置２８は、車速センサ３２から受信した
車速値に基づいて、車速センサ３２の故障検知を行う。FIG. 1 shows an embodiment of the present invention. Each wheel 10,
12, 14, and 16 each include a wheel rotation sensor 1
8, 20, 22, and 24 are attached, and the rotation of each wheel 10, 12, 14, and 16 is detected, respectively. Each of the wheel rotation sensors 18, 20, 22 and 24 is provided with a TCS (traction control system) A
BS (antilock brake system) electronic control unit 2
6 are electrically connected. The TCS / ABS electronic control unit 26 receives the wheel rotation sensors 18 and 2 input thereto.
TCS or AB based on detected values of 0, 22 and 24
Activate S. The TCS / ABS electronic control unit 26
It is electrically connected to the automatic transmission control device 28, and receives a control signal therefrom. The automatic transmission control device 28 includes an engine speed signal Ne and a gear position signal GP.
Is also entered. A vehicle speed sensor 32 for detecting a vehicle speed is attached to the automatic transmission 30. The vehicle speed sensor 32 is electrically connected to the automatic transmission control device 28 and transmits the detected vehicle speed value to the automatic transmission control device 28. The automatic transmission control device 28 detects a failure of the vehicle speed sensor 32 based on the vehicle speed value received from the vehicle speed sensor 32.
【０００７】自動変速機制御装置２８では、図２に示す
ような制御が行われる。まず、ＴＣＳ・ＡＢＳ電子制御
装置２６から入力される信号に基づいて、ＴＣＳ・ＡＢ
Ｓ電子制御装置２６が作動中であるかどうかを判断する
（ステップ１０２）。ＴＣＳ・ＡＢＳ電子制御装置２６
が作動中の場合は、車速センサ３２の故障検知を禁止し
（同１０４）、ＴＣＳ・ＡＢＳ電子制御装置２６が作動
中でない場合は、車速センサ３２の故障検知を行う（同
１０６）。これにより、自動変速機制御装置２８では、
ＴＣＳ・ＡＢＳ電子制御装置２６が作動中の場合は、車
速センサ３２の故障検知を行われない。このため、ＴＣ
Ｓの作動中に車速センサ３２によって検出される異常に
大きな車速値や、ＡＢＳの作動中に車速センサ３２によ
って検出される異常に小さな車速値によって、自動変速
機制御装置２８が車速センサ３２の故障を検知して、フ
ェールセーフ機能が働くということがなくなる。なお、
ＴＣＳ・ＡＢＳ電子制御装置２６が、駆動状態制御手段
を構成し、上記ステップ１０２、１０４及び１０６が、
車速センサ故障検知手段を構成する。In the automatic transmission control device 28, control as shown in FIG. 2 is performed. First, based on a signal input from the TCS / ABS electronic control unit 26, the TCS / AB
It is determined whether the S electronic control device 26 is operating (step 102). TCS / ABS electronic control unit 26
When is operating, the failure detection of the vehicle speed sensor 32 is prohibited (104), and when the TCS / ABS electronic control unit 26 is not operating, failure detection of the vehicle speed sensor 32 is performed (106). Thereby, in the automatic transmission control device 28,
When the TCS / ABS electronic control unit 26 is operating, the failure detection of the vehicle speed sensor 32 is not performed. Therefore, TC
The abnormally large vehicle speed value detected by the vehicle speed sensor 32 during the operation of the S or the abnormally small vehicle speed value detected by the vehicle speed sensor 32 during the operation of the ABS causes the automatic transmission control device 28 to malfunction the vehicle speed sensor 32. And the fail-safe function does not work. In addition,
The TCS / ABS electronic control unit 26 constitutes a drive state control unit, and the above steps 102, 104 and 106
It constitutes a vehicle speed sensor failure detecting means.
【０００８】[0008]
【発明の効果】本発明によれば、ＴＣＳやＡＢＳが作動
中であることを検知して、これらが作動中の間は、車速
センサの故障検知を行わないようにする。これにより、
ＴＣＳの作動中に車速センサにより検出される異常に大
きな車速値や、ＡＢＳの作動中に車速センサにより検出
される異常に小さな車速値によって、車速センサが故障
であると判断されることがないので、誤判断によるフェ
ールセーフ機能の作動を防止することができる。According to the present invention, it is detected that the TCS or the ABS is operating, and the failure detection of the vehicle speed sensor is not performed while these are operating. This allows
An abnormally large vehicle speed value detected by the vehicle speed sensor during the operation of the TCS or an abnormally small vehicle speed value detected by the vehicle speed sensor during the operation of the ABS does not determine that the vehicle speed sensor is malfunctioning. In addition, the operation of the fail-safe function due to erroneous determination can be prevented.
【図１】本発明の実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】自動変速機制御装置の制御フローである。FIG. 2 is a control flow of the automatic transmission control device.
２６ ＴＣＳ・ＡＢＳ電子制御装置（駆動状態制御手
段） ２８ 自動変速機制御装置 ３２ 車速センサ26 TCS / ABS electronic control unit (drive state control means) 28 Automatic transmission control unit 32 Vehicle speed sensor
Claims (1)
れか一方を運転状況に応じて自動的に制御する駆動状態
制御手段と、 車速センサの故障を検知する車速センサ故障検知手段
と、 を有する自動変速機の車速センサ故障検知方法におい
て、駆動状態制御手段は、トラクションコントロールシステ
ム（ＴＣＳ）やアンチロックブレーキシステム（ＡＢ
Ｓ）であり、 駆動状態制御手段が作動中は、車速センサ
故障検知手段において車速センサの故障検知を行わな
い、 ことを特徴とする自動変速機の車速センサ故障検知方
法。1. A driving state control means for automatically controlling a driving force and / or a braking force of a vehicle according to a driving condition, and a vehicle speed sensor failure detecting means for detecting a failure of a vehicle speed sensor. In the method for detecting a failure of a vehicle speed sensor of an automatic transmission, the driving state control means includes:
(TCS) and anti-lock brake system (AB
S), wherein the vehicle speed sensor failure detection means does not detect the failure of the vehicle speed sensor while the drive state control means is operating, the vehicle speed sensor failure detection method for an automatic transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12501093A JP3334943B2 (en) | 1993-04-28 | 1993-04-28 | Automatic transmission vehicle speed sensor failure detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12501093A JP3334943B2 (en) | 1993-04-28 | 1993-04-28 | Automatic transmission vehicle speed sensor failure detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06317212A JPH06317212A (en) | 1994-11-15 |
| JP3334943B2 true JP3334943B2 (en) | 2002-10-15 |
Family
ID=14899633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12501093A Expired - Lifetime JP3334943B2 (en) | 1993-04-28 | 1993-04-28 | Automatic transmission vehicle speed sensor failure detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3334943B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003049695A (en) * | 2001-08-08 | 2003-02-21 | Hitachi Ltd | Vehicular control system |
| CN111301431B (en) * | 2020-03-03 | 2023-03-21 | 上海中科深江电动车辆有限公司 | Method for determining a measured vehicle speed |
-
1993
- 1993-04-28 JP JP12501093A patent/JP3334943B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06317212A (en) | 1994-11-15 |
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