JPH0742824A - Automatic transmission device of car - Google Patents

Automatic transmission device of car

Info

Publication number
JPH0742824A
JPH0742824A JP19048293A JP19048293A JPH0742824A JP H0742824 A JPH0742824 A JP H0742824A JP 19048293 A JP19048293 A JP 19048293A JP 19048293 A JP19048293 A JP 19048293A JP H0742824 A JPH0742824 A JP H0742824A
Authority
JP
Japan
Prior art keywords
transmission
mode
gear
shift
main
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
Application number
JP19048293A
Other languages
Japanese (ja)
Other versions
JP3157656B2 (en
Inventor
Nobuo Hata
信雄 秦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UD Trucks Corp
Original Assignee
UD Trucks Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UD Trucks Corp filed Critical UD Trucks Corp
Priority to JP19048293A priority Critical patent/JP3157656B2/en
Publication of JPH0742824A publication Critical patent/JPH0742824A/en
Application granted granted Critical
Publication of JP3157656B2 publication Critical patent/JP3157656B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H37/00Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/04Combinations of toothed gearings only
    • F16H37/042Combinations of toothed gearings only change gear transmissions in group arrangement
    • F16H37/043Combinations of toothed gearings only change gear transmissions in group arrangement without gears having orbital motion

Landscapes

  • Control Of Transmission Device (AREA)

Abstract

PURPOSE:To provide an automatic transmission device of car which is equipped with an aux. transmission of minor gear ratio type to change over the input side into Hi or Lo, with which successive securing of the running condition is ensured by performing a hopping shift using a less-position mode while ignoring the select mode in such a failed situation that changing-over can no more be conducted. CONSTITUTION:A transmission concerned A comprises an aux. transmission of minor gear ratio type (split gear) to change over the input side of the main transmission into Hi or Lo and another aux. transmission of major gear ratio type (range gear) to change over the output side of the main transmission into Hi or Lo, wherein the arrangement includes a mode switch B, which selects either the many-position mode for changing over the input side aux. transmission car the less-position mode not changing over the same, and a shift control means C which controls the gearing positions of the main/aux. transmissions according to the selected mode when a shift request is given. If a judging means D judges a failed situation that the input side aux. transmission can no more be changed over, a selecting means E automatically selects the less-position mode while ignoring the mode which has been selected.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は車両の自動変速装置に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle automatic transmission.

【0002】[0002]

【従来の技術】近年、車両の自動変速装置としてエンジ
ンと遊星歯車式トランスミッションの間にトルクコンバ
ータを介装するのでなく、従来のトランスミッションと
機械的なクラッチを用い、これらの作動状態を検出する
各種センサ類とこれらを駆動するアクチュエータを設
け、変速要求が発生するとこれらの検出信号に基づいて
マイクロコンピュータを格納するコントロールユニット
によりアクチュエータの駆動を制御することで自動変速
を行うものが知られている。このうち、トランスミッシ
ョンとして少ないメインギヤできめ細かい多段変速の実
現を図るため、主変速機の出力側をハイ・ローに切り替
える大減速比型の副変速機(レンジギヤ)と、入力側を
ハイ・ローに切り替える小減速比型の副変速機(スプリ
ットギヤ)を付加する例が見られる(実開平4ー586
65号公報)。
2. Description of the Related Art In recent years, as an automatic transmission for a vehicle, a conventional transmission and a mechanical clutch are used instead of a torque converter provided between an engine and a planetary gear type transmission to detect various operating states thereof. It is known that a sensor and an actuator for driving them are provided, and when a shift request is generated, the control unit that stores a microcomputer controls the drive of the actuator based on these detection signals to perform automatic shift. Of these, a large reduction ratio type auxiliary transmission (range gear) that switches the output side of the main transmission to high / low and an input side to high / low in order to achieve fine multi-speed shifting with few main gears as a transmission An example of adding a small reduction ratio type auxiliary transmission (split gear) can be seen (actual open flat 4-586).
No. 65).

【0003】[0003]

【発明が解決しようとする課題】ところで、このような
従来例ではコントロールユニットで必要に応じてメイン
ギヤとレンジギヤの組み合わせを変更しながら、これら
の組み合わせで決まる変速段をさらにスプリットギヤで
ハイ・ローに切り替える制御が行われるが、そのためス
プリットギヤの切り替え不能な故障状態が発生すると、
レンジギヤとメインギヤの組み合わせで通常走行に必要
な変速段を確保できるにも拘わらず、スプリットギヤが
切り替わらないと一連の制御処理が完了しないことか
ら、変速不能な状態で車両が立ち往生してしまうという
不具合があった。
By the way, in such a conventional example, while changing the combination of the main gear and the range gear as needed in the control unit, the shift stage determined by these combinations is further changed to high / low by the split gear. Switching control is performed, but if a split gear switching failure condition occurs,
Although the combination of the range gear and the main gear can secure the gear required for normal running, the series of control processes will not be completed unless the split gear is switched, which causes the vehicle to get stuck in an unshiftable state. was there.

【0004】この発明はこのような問題点を解決するた
め、スプリットギヤの切り替え不能な故障状態のバック
アップ対策を図ることを目的とする。
In order to solve such a problem, the present invention aims to provide a backup measure for a failure state in which the split gear cannot be switched.

【0005】[0005]

【課題を解決するための手段】そのため、図4のように
主変速機の入力側をハイ・ローに切り替える小減速比型
の副変速機と主変速機の出力側をハイ・ローに切り替え
る大減速比型の副変速機を持つトランスミッションA
と、入力側副変速機の切り替えを行う多段モードと入力
側副変速機の切り替えを行わない少段モードを人為的に
選択するためのモードスイッチBと、変速要求の発生時
にモードスイッチの選択モードに応じた目標変速段へト
ランスミッションのシフトアップ,シフトダウンを操作
すべく主副変速機のギヤ位置を制御する手段Cと、入力
側副変速機の切り替え不能な故障状態を判定する手段D
と、その判定信号に基づいて入力側副変速機の故障状態
が発生するとモードスイッチを無視して少段モードを自
動的に選択する手段Eを設ける。
Therefore, as shown in FIG. 4, a small reduction ratio type auxiliary transmission that switches the input side of the main transmission to high / low and an output side of the main transmission to high / low are large. Transmission A with reduction ratio type auxiliary transmission
And a mode switch B for artificially selecting a multi-speed mode in which the input side auxiliary transmission is switched and a small speed mode in which the input side auxiliary transmission is not switched, and a mode switch selection mode when a shift request is generated. Means C for controlling the gear position of the main / auxiliary transmission so as to operate the upshift and downshift of the transmission to the target shift speed according to the above, and means D for determining a failure state in which the input side auxiliary transmission cannot switch.
Further, there is provided means E for automatically selecting the small gear mode by ignoring the mode switch when a failure state of the input side auxiliary transmission occurs based on the determination signal.

【0006】[0006]

【作用】トランスミッションはモードスイッチで少段モ
ードを選択すると変速要求の発生に対して入力側副変速
機の切り替えを伴わない大きな段間比で、モードスイッ
チで多段モードを選択すると同じく入力側副変速機の切
り替えを行う小さな段間比でシフトアップ操作またはシ
フトダウン操作が実行されるのであり、入力側副変速機
の切り替え不能な故障状態が発生すると、モードスイッ
チの選択モードを無視して自動的に少段モードでトラン
スミッションの段飛び変速が遂行される。したがって、
入力側副変速機の故障状態が発生しても、主変速機のギ
ヤチェンジと出力側副変速機の切り替えで通常走行に必
要な変速を確保しながら、車両の走行状態を継続するこ
とが可能になる。
[Function] When the transmission is selected in the small shift mode by the mode switch, the transmission has a large inter-stage ratio that does not involve switching of the input side auxiliary transmission in response to the generation of a shift request. The up-shift operation or down-shift operation is executed with a small gear ratio for switching gears.When a failure condition in which the input side auxiliary transmission cannot be switched occurs, the mode selected by the mode switch is ignored and automatic operation is performed. In addition, the stepped shift of the transmission is performed in the small shift mode. Therefore,
Even if a failure occurs in the input side sub-transmission, it is possible to continue the running state of the vehicle while securing the gear change required for normal running by switching the gear change of the main transmission and the output side sub-transmission. become.

【0007】[0007]

【実施例】図1はディーゼルエンジン車両への適用例を
示す装置全体の構成図で、燃料噴射ポンプ1にはコント
ロールレバーをアクセル開度に応じて駆動すると共に、
エンジン回転を要求回転と一致させるように制御するス
ロットルアクチュエータ2が、機械式クラッチ3にはク
ラッチの断続操作を行うクラッチアクチュエータ4(エ
アブースタ)が、トランスミッション5にはメインギヤ
のギヤシフト機構を駆動するギヤシフトアクチュエータ
6のほか、メインギヤ前後のスプリットギヤとレンジギ
ヤをそれぞれHーL(ハイ・ロー)に切り替えるスプリ
ットアクチュエータ7とレンジアクチュエータ8が設け
らえる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of the entire apparatus showing an application example to a diesel engine vehicle, in which a control lever of a fuel injection pump 1 is driven in accordance with an accelerator opening degree, and
A throttle actuator 2 for controlling the engine rotation speed to match the required rotation speed, a clutch actuator 4 (air booster) for engaging and disengaging the clutch for the mechanical clutch 3, and a gear shift for driving the gear shift mechanism of the main gear for the transmission 5. In addition to the actuator 6, a split actuator 7 and a range actuator 8 for switching the split gear before and after the main gear and the range gear to HL (high / low), respectively can be provided.

【0008】トランスミッション5はこの場合、図2の
ようにメインギヤZm1〜Zm3ーZc3〜Zc1,Z
mRーZcRーZmR1(前後3速後退1速)に、変速
比の小さいスプリットギヤZm4ーZc4,Zm5ーZ
c5(ハイ,ロー)と、変速比の大きいレンジギヤZr
1ーZcr1,Zr2ーZcr2(ハイ,ロー)が配列
され、変速にスプリットギヤZm4・Zm5の切り替え
を行わない場合にメインギヤZm1〜Zm3ーZc3〜
Zc1とレンジギヤZr1ーZcr1,Zr2ーZcr
2の組み合わせで前進6段に、スプリットギヤZm4・
Zm5の切り替えが加わると前進12段に変速可能な構
成になっている。
In this case, the transmission 5 has main gears Zm1-Zm3-Zc3-Zc1, Z as shown in FIG.
mR-ZcR-ZmR1 (3 front / rear 3rd reverse 1st) split gear Zm4-Zc4, Zm5-Z with small gear ratio
c5 (high, low) and range gear Zr with a large gear ratio
1-Zcr1, Zr2-Zcr2 (high, low) are arranged, and main gears Zm1 to Zm3 to Zc3 to when the split gears Zm4 and Zm5 are not switched for shifting.
Zc1 and range gear Zr1-Zcr1, Zr2-Zcr
6 gears forward with a combination of 2, split gear Zm4
When Zm5 is switched, it is possible to shift to 12 forward speeds.

【0009】車両の変速制御に必要な運転状態の検出手
段として、アクセルペダル9にはエンジン負荷に相当す
るペダル踏み角(アクセル開度)を検出するアクセルセ
ンサ10が、クラッチ3にはフライホイールからエンジ
ンの回転速度を検出するエンジン回転センサ11と、ク
ラッチ3のストローク位置を検出するクラッチストロー
クセンサ12が、クラッチペダル13(クラッチブース
タ4を手動操作する)にはペダルの初期位置と作動位置
を検出するペダルSW14,15が、トランスミッショ
ン5には実際のシフト位置を検出するポジションセンサ
16と、メインシャフトに連結するプロペラシャフトの
回転速度を検出するメインシャフト回転センサ17(車
速センサとして機能する)が取り付けられる。
As means for detecting the driving state required for the shift control of the vehicle, the accelerator pedal 9 is an accelerator sensor 10 for detecting a pedal depression angle (accelerator opening) corresponding to the engine load, and the clutch 3 is a flywheel. An engine speed sensor 11 for detecting the engine speed and a clutch stroke sensor 12 for detecting the stroke position of the clutch 3 detect the initial position and the operating position of the pedal for the clutch pedal 13 (the clutch booster 4 is manually operated). The pedals SW14, 15 are mounted on the transmission 5 with a position sensor 16 for detecting an actual shift position and a main shaft rotation sensor 17 (which functions as a vehicle speed sensor) for detecting the rotation speed of a propeller shaft connected to the main shaft. To be

【0010】トランスミッション5のメインシャフト上
を遊転するメインギヤZm1〜Zm3,ZmRをシンク
ロ領域でメインシャフトに噛み合わせるため、カウンタ
シャフトの回転速度を検出するカウンタシャフト回転セ
ンサ18が設けられる。運転室にはトランスミッション
5のシフトレバー装置19(シフタ)に加えて、変速
(シフトアップ,シフトダウン)にスプリットギヤZm
4・Zm5の切り替えを行わない前進6段モードとスプ
リットギヤZm4・Zm5の切り替えが加わる前進12
段モードを選択するためのモードスイッチ19aと、ト
ランスミッション5のシフト位置およびモードスイッチ
のオンーオフ状態(選択モード)などを表示するモニタ
20が配設される。なお、シフタ19はその動作パター
ンがシフトアップ,シフトダウン,ホールド、リバー
ス,ニュートラルの5ポジションを持つh型に単純化さ
れる。
A counter shaft rotation sensor 18 for detecting the rotation speed of the counter shaft is provided in order to mesh the main gears Zm1 to Zm3 and ZmR which idle on the main shaft of the transmission 5 with the main shaft in the synchronizing region. In the cab, in addition to the shift lever device 19 (shifter) of the transmission 5, the split gear Zm is used for shifting (shift up, shift down).
6-forward mode without switching 4 / Zm5 and forward 12 with split gear Zm4 / Zm5 switching
A mode switch 19a for selecting the gear mode and a monitor 20 for displaying the shift position of the transmission 5 and the on / off state of the mode switch (selection mode) are provided. The operation pattern of the shifter 19 is simplified to an h-type having five positions of upshift, downshift, hold, reverse, and neutral.

【0011】これらの出力信号に基づいてアクチュエー
タ2,6〜8の駆動を制御するのがエンジンコントロー
ルユニット21とトランスミッションコントロールユニ
ット22で、これらはシフタ19のレバー位置に対応す
るシフト要求が発生すると、必要に応じてエンジン回転
速度を要求回転に制御しながら、シフタ19の要求位置
へのトランスミッション5のギヤシフトを実行する。シ
フトアップ要求およびシフトダウン要求に対しては、図
3のようにモードスイッチ19aがオフのときにモニタ
20のモード表示ランプを消灯すると共にスプリットギ
ヤZm4・Zm5の切り替えを伴わない前進6段モード
で、モードスイッチ19aがオンのときにモード表示ラ
ンプを点灯すると共にスプリットギヤZm4・Zm5の
切り替えを行う前進12段モードでトランスミッション
5の変速を制御する(1.01〜1.06)。スプリッ
トギヤZm4・Zm5の切り替え不能な故障状態を判定
すると、モードスイッチ19aのオンーオフ状態を無視
して前進6段モードの変速操作を遂行すると共に、モニ
タ20のモード表示ランプを明るく点滅してスプリット
ギヤ系の故障状態を表示する(1.01→1.07→
1.04)。
It is the engine control unit 21 and the transmission control unit 22 that control the drive of the actuators 2, 6 to 8 based on these output signals, and these generate a shift request corresponding to the lever position of the shifter 19. The gear shift of the transmission 5 to the required position of the shifter 19 is executed while controlling the engine rotation speed to the required rotation as required. In response to a shift-up request and a shift-down request, the mode display lamp of the monitor 20 is turned off while the mode switch 19a is off as shown in FIG. 3, and the forward six-speed mode without switching the split gears Zm4 and Zm5 is used. When the mode switch 19a is on, the mode indicator lamp is turned on and the shift of the transmission 5 is controlled in the forward 12-speed mode in which the split gears Zm4 and Zm5 are switched (1.01 to 1.06). When it is determined that the split gears Zm4 and Zm5 cannot be switched, the on / off state of the mode switch 19a is ignored to perform the shift operation in the forward 6-speed mode, and the mode display lamp of the monitor 20 blinks brightly. Display system failure status (1.01 → 1.07 →
1.04).

【0012】このような構成により、トランスミッショ
ン5は例えば4H(メインギヤが2速,レンジギヤが
H,スプリットギヤがH)の走行状態でシフタ19のシ
フトアップ操作を行うと、モードスイッチ19aがオフ
のときに5H(メインギヤが3速,レンジギヤがH,ス
プリットギヤがH)へ段飛びに、モードスイッチ19a
がオンのときに5L(メインギヤが3速,レンジギヤが
H,スプリットギヤがL)へ1段だけシフトチェンジす
ることになる。
With such a configuration, when the transmission 5 is operated in the 4H mode (main gear is the second speed, range gear is H, split gear is H) and the shifter 19 is upshifted, the mode switch 19a is off. To 5H (main gear is third speed, range gear is H, split gear is H), and the mode switch 19a
When is turned on, the gear shifts to 5L (the main gear is the third speed, the range gear is H, the split gear is L), and only one gear is changed.

【0013】何らかの原因でスプリットギヤZm4・Z
m5の切り替え不能な故障状態が発生しても、トランス
ミッションコントロールユニット22内のバックアップ
機能が働いて前進6段モードで変速制御を遂行するた
め、例えばモードスイッチ19aがオンでトランスミッ
ション5が4Hのときにスプリットギヤ系の故障状態が
発生すると、シフタ19のシフトアップ操作に対してメ
インギヤを3速へシフトチェンジすることで5Hへの段
飛び変速が行われるので、メインギヤZm1〜Zm3の
シフトチェンジとレンジギヤZr1・Zr2の切り替え
で通常走行に必要な変速を確保しながら、車両の走行状
態を継続することが可能、つまり変速不能から車両が立
ち往生するような不具合の回避が図れる。
For some reason, split gear Zm4 ・ Z
Even if a failure state in which m5 cannot be switched occurs, the backup function in the transmission control unit 22 operates and shift control is performed in the forward 6-speed mode. Therefore, for example, when the mode switch 19a is on and the transmission 5 is 4H. When a failure condition of the split gear system occurs, a step shift to 5H is performed by shifting the main gear to the third speed in response to the shift-up operation of the shifter 19, so that a shift change of the main gears Zm1 to Zm3 and a range gear Zr1. It is possible to continue the traveling state of the vehicle while securing the shift required for normal traveling by switching Zr2, that is, it is possible to avoid the problem that the vehicle is stuck due to the inability to shift.

【0014】スプリットギヤ系の故障発生はモニタ20
のモード表示ランプでドライバに警報されるので、人為
操作に拠らずに段飛び変速へ移行することで抱く違和感
もすぐに解消できる。
The occurrence of a failure in the split gear system is monitored by the monitor 20.
Since the driver is warned by the mode display lamp of, the discomfort felt by shifting to the stepped shift without depending on the human operation can be immediately resolved.

【0015】[0015]

【発明の効果】以上要するにこの発明によれば、主変速
機の入力側をハイ・ローに切り替える小減速比型の副変
速機と主変速機の出力側をハイ・ローに切り替える大減
速比型の副変速機を持つトランスミッションと、変速に
入力側副変速機の切り替えを伴う多段モードと入力側副
変速機の切り替えを伴わない少段モードを人為的に選択
するためのモードスイッチと、変速要求の発生時にモー
ドスイッチの選択モードに応じた目標変速段へトランス
ミッションのシフトアップ,シフトダウンを操作すべく
主副変速機のギヤ位置を制御する手段と、入力側副変速
機の切り替え不能な故障状態を判定する手段と、その判
定信号に基づいて入力側副変速機の故障状態が発生する
とモードスイッチを無視して少段モードを自動的に選択
する手段を設けたので、モードスイッチでトランスミッ
ションの変速を多段モードと少段モードに切り替え可能
なばかりでなく、入力側副変速機の切り替え不能な故障
状態が発生すると少段モードでトランスミッションの変
速制御が遂行されるため、主変速機のギヤチェンジと出
力側副変速機の切り替えで通常走行に必要な変速を確保
しながら、車両の走行状態を継続できるという効果が得
られる。
In summary, according to the present invention, the small reduction ratio type auxiliary transmission for switching the input side of the main transmission to high / low and the large reduction ratio type for switching the output side of the main transmission to high / low. , A mode switch for artificially selecting a multi-speed mode that involves switching the input-side auxiliary transmission and a small-speed mode that does not involve switching the input-side auxiliary transmission, and a shift request. In the event of occurrence of a failure, the means for controlling the gear position of the main and auxiliary transmissions to operate the transmission upshift and downshift to the target shift speed according to the selection mode of the mode switch, and the input side auxiliary transmission unswitchable fault condition. And means for automatically selecting the small gear mode by ignoring the mode switch when a failure state of the input side auxiliary transmission occurs based on the determination signal. Therefore, not only is it possible to switch the transmission speed change between the multi-speed mode and the low-speed mode with the mode switch, but the transmission speed change control is executed in the low-speed mode when a failure condition in which the input side auxiliary transmission cannot be switched occurs. The effect that the traveling state of the vehicle can be continued while securing the gear shift required for normal traveling by changing the gear of the main transmission and switching of the output side auxiliary transmission can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】自動変速装置の全体構成図である。FIG. 1 is an overall configuration diagram of an automatic transmission.

【図2】トランスミッションの構成説明図である。FIG. 2 is an explanatory diagram of a configuration of a transmission.

【図3】コントロールユニットの制御内容を説明するフ
ローチャートである。
FIG. 3 is a flowchart illustrating control contents of a control unit.

【図4】この発明のクレーム対応図である。FIG. 4 is a diagram corresponding to the claims of the present invention.

【符号の説明】[Explanation of symbols]

5 トランスミッション 6 ギヤシフトアクチュエータ 7 スプリットアクチュエータ 8 レンジアクチュエータ 16 ポジションセンサ 17 メインシャフト回転センサ(車速センサ) 18 カウンタシャフト回転センサ 19 シフタ 19a モードスイッチ 20 モニタ 22 トランスミッションコントロールユニット Zm1〜Zm3ーZc3〜Zc1,ZmRーZcRーZ
mR1 メインギヤ Zm4ーZc4,Zm5ーZc5 スプリットギヤ Zr1ーZcr1,Zr2ーZcr2 レンジギヤ
5 Transmission 6 Gear shift actuator 7 Split actuator 8 Range actuator 16 Position sensor 17 Main shaft rotation sensor (vehicle speed sensor) 18 Counter shaft rotation sensor 19 Shifter 19a Mode switch 20 Monitor 22 Transmission control unit Zm1-Zm3-Zc3-Zc1, ZmR-ZcR -Z
mR1 Main gear Zm4-Zc4, Zm5-Zc5 Split gear Zr1-Zcr1, Zr2-Zcr2 Range gear

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 主変速機の入力側をハイ・ローに切り替
える小減速比型の副変速機と主変速機の出力側をハイ・
ローに切り替える大減速比型の副変速機を持つトランス
ミッションと、変速に入力側副変速機の切り替えを伴う
多段モードと入力側副変速機の切り替えを伴わない少段
モードを人為的に選択するためのモードスイッチと、変
速要求の発生時にモードスイッチの選択モードに応じた
目標変速段へトランスミッションのシフトアップ,シフ
トダウンを操作すべく主副変速機のギヤ位置を制御する
手段と、入力側副変速機の切り替え不能な故障状態を判
定する手段と、その判定信号に基づいて入力側副変速機
の故障状態が発生するとモードスイッチを無視して少段
モードを自動的に選択する手段を設けたことを特徴とす
る車両の自動変速装置。
1. A small reduction ratio type auxiliary transmission that switches the input side of the main transmission to high / low and the output side of the main transmission to high / low.
To artificially select a transmission that has a large reduction ratio type auxiliary transmission that switches to low, and a multi-speed mode that involves switching of the input-side auxiliary transmission and a small-speed mode that does not involve switching of the input-side auxiliary transmission. Mode switch and means for controlling the gear position of the main and auxiliary transmissions to operate the transmission upshift and downshift to the target shift speed according to the selection mode of the mode switch when a shift request is generated, and the input side auxiliary shift A means for determining a failure state in which the switching of the machine is not possible, and a means for automatically selecting the small gear mode by ignoring the mode switch when a failure state of the input side auxiliary transmission occurs based on the determination signal are provided. An automatic transmission for a vehicle characterized by:
JP19048293A 1993-07-30 1993-07-30 Automatic transmission for vehicles Expired - Fee Related JP3157656B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19048293A JP3157656B2 (en) 1993-07-30 1993-07-30 Automatic transmission for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19048293A JP3157656B2 (en) 1993-07-30 1993-07-30 Automatic transmission for vehicles

Publications (2)

Publication Number Publication Date
JPH0742824A true JPH0742824A (en) 1995-02-10
JP3157656B2 JP3157656B2 (en) 2001-04-16

Family

ID=16258841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19048293A Expired - Fee Related JP3157656B2 (en) 1993-07-30 1993-07-30 Automatic transmission for vehicles

Country Status (1)

Country Link
JP (1) JP3157656B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7261673B2 (en) 2002-10-21 2007-08-28 Nissan Diesel Motor Co., Ltd. Apparatus for controlling automatic transmission
US7544140B2 (en) 2006-01-03 2009-06-09 Toyota Jidosha Kabushiki Kaisha Control device for vehicular drive system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63255136A (en) * 1987-04-10 1988-10-21 Mazda Motor Corp Controller for auxiliary transmission
JPS63270964A (en) * 1987-04-27 1988-11-08 Mazda Motor Corp Automatic transmission with transfer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63255136A (en) * 1987-04-10 1988-10-21 Mazda Motor Corp Controller for auxiliary transmission
JPS63270964A (en) * 1987-04-27 1988-11-08 Mazda Motor Corp Automatic transmission with transfer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7261673B2 (en) 2002-10-21 2007-08-28 Nissan Diesel Motor Co., Ltd. Apparatus for controlling automatic transmission
US7544140B2 (en) 2006-01-03 2009-06-09 Toyota Jidosha Kabushiki Kaisha Control device for vehicular drive system

Also Published As

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JP3157656B2 (en) 2001-04-16

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