JP2016098923A - Shift control device for continuously variable transmission - Google Patents
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Abstract
Description
本発明は、無段変速機の変速制御装置に関する。 The present invention relates to a transmission control device for a continuously variable transmission.
従来、変速機の一つとして、無段変速機が一般的に知られている。無段変速機はエンジンからの駆動力を入力軸で受け取り、出力軸から駆動輪へと伝達する。 Conventionally, a continuously variable transmission is generally known as one of transmissions. The continuously variable transmission receives the driving force from the engine at the input shaft and transmits it from the output shaft to the driving wheels.
変速制御装置は無段変速機に接続され、その制御を行う。 The shift control device is connected to and continuously controls the continuously variable transmission.
変速制御装置はアクセルペダル開度とエンジン回転数を他の機器から取得し、それらに基づきに無段変速機の目標変速比を決定し、変速比が目標変速比になるように制御する。 The speed change control device acquires the accelerator pedal opening and the engine speed from other devices, determines the target speed ratio of the continuously variable transmission based on them, and controls the speed ratio to be the target speed ratio.
実際の変速比（実変速比）は、変速機の入力軸と出力軸の其々に取り付けられた回転数センサの値を変速制御装置が読み取り、その値を基に算出される。 The actual gear ratio (actual gear ratio) is calculated based on the values read from the rotational speed sensors attached to the input shaft and the output shaft of the transmission, respectively.
目標変速比と、実変速比との比較を行うことで、変速機制御が正常に行われているかを確認することができる。（例えば、特許文献１参照。） By comparing the target gear ratio with the actual gear ratio, it is possible to confirm whether transmission control is normally performed. (For example, refer to Patent Document 1.)
しかしながら、上記従来の変速制御装置では、異常発生個所が１カ所のみの場合は正しく異常検出することが可能だが、２カ所以上に異常が発生した場合、正しく異常検出できないおそれがある。例えば、入力軸と出力軸それぞれの回転数が同時に異常になった場合、各回転数の値が不正確であるにもかかわらず、算出された実変速比が結果として正常範囲におさまってしまう事態も発生し得るからである。 However, in the above-described conventional shift control device, it is possible to correctly detect an abnormality when there is only one abnormality occurrence location. However, if an abnormality occurs at two or more locations, there is a possibility that the abnormality cannot be detected correctly. For example, if the rotational speeds of the input shaft and output shaft both become abnormal at the same time, the calculated actual gear ratio will fall within the normal range as a result, despite the incorrect rotational speed values. It is also possible to generate.
そこで、本発明は、変速機の異常検出の信頼性を向上させることを目的とする。 Accordingly, an object of the present invention is to improve the reliability of transmission abnormality detection.
本発明は、エンジンの回転数とアクセル開度とに基づいて目標変速比を算出する目標変速比算出手段と、エンジンと接続される入力軸に設けられる回転数センサから取得される入力軸回転数と、駆動輪と接続される出力軸に設けられる回転数センサから取得される出力軸回転数とに基づいて、第１検出変速比を算出する第１検出変速比算出手段と、を備える無段変速機の変速制御装置において、エンジン回転数、車速に基づいて第２検出変速比を算出する第２検出変速比算出手段を備え、前記目標変速比と、前記第１検出変速比と、前記第２検出変速比に基づいて前記無段変速機の異常を判断することを特徴とする。 The present invention relates to a target speed ratio calculating means for calculating a target speed ratio based on the engine speed and the accelerator opening, and an input shaft speed acquired from a speed sensor provided on an input shaft connected to the engine. And a first detection speed ratio calculating means for calculating a first detection speed ratio based on an output shaft speed acquired from a speed sensor provided on an output shaft connected to the drive wheels. The transmission shift control device includes a second detection speed ratio calculation unit that calculates a second detection speed ratio based on the engine speed and the vehicle speed, and includes the target speed ratio, the first detection speed ratio, and the first speed ratio. An abnormality of the continuously variable transmission is determined based on a two-detection gear ratio.
本発明は、変速機の異常検出の信頼性を向上させることができる。 The present invention can improve the reliability of transmission abnormality detection.
図１は、本実施形態に係る変速制御装置１とその周辺機器を示すブロック図である。 FIG. 1 is a block diagram showing a shift control device 1 according to the present embodiment and its peripheral devices.
変速機と変速制御装置１は、４輪車などの車両に搭載されている。 The transmission and the shift control device 1 are mounted on a vehicle such as a four-wheeled vehicle.
車両は、走行する為の駆動輪１９を備える。 The vehicle includes drive wheels 19 for traveling.
エンジン１５は、内燃機関および／または電動機を含むことができる。エンジン１５が出力する動力は、駆動輪１９に伝達され、車両を走行させる。エンジン１５と駆動輪１９との間の動力伝達経路には、変速機が設けられている。 The engine 15 can include an internal combustion engine and / or an electric motor. The power output from the engine 15 is transmitted to the drive wheels 19 to drive the vehicle. A transmission is provided in the power transmission path between the engine 15 and the drive wheels 19.
変速機は、エンジン１５の出力軸１０の回転を変速して駆動輪１９に伝達する。変速機は、トルクコンバータと、多段型または無段型の減速機、前後進切替機構を備えることができる。変速機は、変速比を変化させるためのプライマリプーリ３、セカンダリプーリ４、ベルト５で構成される動力伝達機構を備える。 The transmission shifts the rotation of the output shaft 10 of the engine 15 and transmits it to the drive wheels 19. The transmission can include a torque converter, a multistage or continuously variable speed reducer, and a forward / reverse switching mechanism. The transmission includes a power transmission mechanism including a primary pulley 3, a secondary pulley 4, and a belt 5 for changing a gear ratio.
プライマリプーリ３は、エンジン１５から出力される駆動力を受け取る為の入力軸２が接続されている。セカンダリプーリ４は、駆動輪１９に対して駆動力を出力する為の出力軸１０が接続されている。 The primary pulley 3 is connected to the input shaft 2 for receiving the driving force output from the engine 15. The secondary pulley 4 is connected to an output shaft 10 for outputting a driving force to the drive wheels 19.
変速機は、各プーリのベルト接触半径を制御する為の油圧制御装置を備える。変速機は、油圧制御装置を制御し、変速比を変化させるための複数のバルブを含むプライマリプーリ制御用ソレノイド８、セカンダリプーリ制御用ソレノイド９を備える。 The transmission includes a hydraulic control device for controlling the belt contact radius of each pulley. The transmission includes a primary pulley control solenoid 8 and a secondary pulley control solenoid 9 including a plurality of valves for controlling the hydraulic control device and changing the gear ratio.
変速制御装置１は、電子制御装置である。変速制御装置１は、乗員の指示に応じた変速比を提供するように、また、車両の走行状態に応じた変速比を提供するように変速機を制御する。変速制御装置１は、乗員の指示、車両の状況に応じた目標とする変速比（目標変速比）を算出する。変速制御装置１は、目標変速比が得られるようにソレノイドを制御する。具体的には、変速制御装置１は、目標とする変速比が得られるように各ソレノイドへの通電状態を調節する。 The transmission control device 1 is an electronic control device. The transmission control device 1 controls the transmission so as to provide a transmission ratio according to an instruction from the occupant and to provide a transmission ratio according to the traveling state of the vehicle. The speed change control device 1 calculates a target speed change ratio (target speed change ratio) according to an occupant's instruction and a vehicle situation. The transmission control device 1 controls the solenoid so that the target transmission ratio is obtained. Specifically, the shift control device 1 adjusts the energization state of each solenoid so that a target gear ratio is obtained.
変速機は、エンジン１５から変速機へ伝達される回転数、すなわち変速機の入力回転数を検出するための入力軸回転数センサ１１と、エンジン１５から変速機へ伝達される回転数、すなわち変速機の入力回転数を検出するための出力軸回転数センサ１２を備える。 The transmission includes an input shaft rotational speed sensor 11 for detecting a rotational speed transmitted from the engine 15 to the transmission, that is, an input rotational speed of the transmission, and a rotational speed transmitted from the engine 15 to the transmission, that is, a shift. An output shaft rotational speed sensor 12 for detecting the input rotational speed of the machine is provided.
入力軸回転数センサ１１、出力軸回転数センサ１２は、入力軸２、出力軸１０にそれぞれ接続され回転数を検出している。これら入力軸回転数センサ１１、出力軸回転数センサ１２により検出された入力回転数と出力回転数は、変速制御装置１に入力される。 The input shaft rotational speed sensor 11 and the output shaft rotational speed sensor 12 are connected to the input shaft 2 and the output shaft 10 respectively to detect the rotational speed. The input rotation speed and the output rotation speed detected by the input shaft rotation speed sensor 11 and the output shaft rotation speed sensor 12 are input to the transmission control device 1.
変速制御装置１は、マイクロコンピュータ(ＣＰＵ)を備えている。ＣＰＵは、各センサからの情報を取得する為の入力端子、各ソレノイドの制御信号を送出する為の出力端子、プログラムを実行する為の処理装置、プログラムを格納する為の記憶媒体、駆動系を構成する他の機器との通信を行う為の通信機能、を備えている。 The transmission control device 1 includes a microcomputer (CPU). The CPU includes an input terminal for acquiring information from each sensor, an output terminal for sending control signals for each solenoid, a processing device for executing the program, a storage medium for storing the program, and a drive system. It has a communication function for communicating with other devices.
プログラムは、ＣＰＵによって実行されることによって、変速制御装置１をこの明細書に記載される装置として機能させ、この明細書に記載される制御方法を実行するように変速制御装置１を機能させる。プログラムは目標変速比計算処理と、第１検出変速比計算処理と、第２検出変速比計算処理を含み、ＣＰＵに実行されることによって変速制御装置１にこれらの機能を提供する。 The program is executed by the CPU to cause the transmission control device 1 to function as a device described in this specification, and to cause the transmission control device 1 to function so as to execute the control method described in this specification. The program includes a target speed ratio calculation process, a first detection speed ratio calculation process, and a second detection speed ratio calculation process, and provides these functions to the speed change control device 1 by being executed by the CPU.
目標変速比計算と、第１検出変速比計算と、第２検出変速比計算の構成は、変速機が搭載される車両の形態や、走行状況に応じて選択することができる。例えば、駆動輪１９の直径によって、車速から回転数への計算式が変わる為、駆動輪１９の直径に応じた計算式を設定するなどである。 The configurations of the target gear ratio calculation, the first detection gear ratio calculation, and the second detection gear ratio calculation can be selected in accordance with the form of the vehicle on which the transmission is mounted and the traveling situation. For example, since the calculation formula from the vehicle speed to the rotational speed varies depending on the diameter of the drive wheel 19, a calculation formula corresponding to the diameter of the drive wheel 19 is set.
ＣＰＵは、各センサからの情報を取得する為の入力端子、各ソレノイドの制御信号を送出する為の出力端子、プログラムを実行する為の処理装置、プログラムを格納する為の記憶媒体、駆動系を構成する他の機器との通信を行う為の通信機能、を備えている。ＣＰＵは車載ネットワーク２１に通信機能を介して接続されていて、車載ネットワーク２１に情報を送信したり、他の機器、例えばアクセルペダルセンサ１７や車速センサ１８などから情報を受け取ることができる。 The CPU includes an input terminal for acquiring information from each sensor, an output terminal for sending control signals for each solenoid, a processing device for executing the program, a storage medium for storing the program, and a drive system. It has a communication function for communicating with other devices. The CPU is connected to the in-vehicle network 21 via a communication function, and can transmit information to the in-vehicle network 21 or receive information from other devices such as the accelerator pedal sensor 17 and the vehicle speed sensor 18.
変速制御装置１は、ソレノイドの制御を円滑に行う為のソレノイド駆動回路を備える。変速制御装置１はＣＰＵの通信機能、入力端子、出力端子を使用することでソレノイド駆動回路を制御することができる。ＣＰＵは、対象となるソレノイド駆動回路に対し、通電状態の指令信号を出力するための端子を有し、指令信号を出力する制御手段を提供する。ソレノイド駆動回路は、ＣＰＵから入力された指令信号に従い、ソレノイドの通電状態を制御する。 The transmission control device 1 includes a solenoid drive circuit for smoothly controlling the solenoid. The speed change control device 1 can control the solenoid drive circuit by using the communication function, input terminal, and output terminal of the CPU. The CPU has a terminal for outputting an energized command signal to the target solenoid drive circuit, and provides control means for outputting the command signal. The solenoid drive circuit controls the energization state of the solenoid in accordance with a command signal input from the CPU.
例えば、プライマリプーリ制御用ソレノイド８に接続されたソレノイド駆動回路は、ＣＰＵから出力された指令信号に応じた電流をプライマリプーリ制御用ソレノイド８に通電する。 For example, a solenoid drive circuit connected to the primary pulley control solenoid 8 energizes the primary pulley control solenoid 8 with a current corresponding to a command signal output from the CPU.
各ソレノイド駆動回路は、対応するソレノイドへの通電状態を示すモニタ信号を生成し、出力する。
ＣＰＵは、各ソレノイド駆動回路から出力されるモニタ信号を受信し入力するための端子を有する。
Each solenoid drive circuit generates and outputs a monitor signal indicating the energization state of the corresponding solenoid.
The CPU has a terminal for receiving and inputting a monitor signal output from each solenoid drive circuit.
エンジン１５は、駆動力を発生させ、変速機の入力軸２へ伝える。 The engine 15 generates a driving force and transmits it to the input shaft 2 of the transmission.
エンジン制御装置（ＥＣＵ）１６はエンジン１５の制御を行うとともに、通信機能を介し、エンジン回転数を含む動作情報を車載ネットワーク２１に出力する。 The engine control unit (ECU) 16 controls the engine 15 and outputs operation information including the engine speed to the in-vehicle network 21 via a communication function.
アクセルペダルセンサ１７は、乗員が踏み込んだアクセルペダルの情報を、アクセル開度として、通信機能を介して車載ネットワーク２１に出力する。 The accelerator pedal sensor 17 outputs information on the accelerator pedal that the occupant has depressed to the in-vehicle network 21 through the communication function as the accelerator opening.
車速センサ１８は、車両の速度を検出し、その情報を通信機能により車載ネットワーク２１に出力する。 The vehicle speed sensor 18 detects the speed of the vehicle and outputs the information to the in-vehicle network 21 by a communication function.
図２は各センサ類で取得された情報をどのように処理するかを示すデータフロー図である。 FIG. 2 is a data flow diagram showing how information acquired by each sensor is processed.
変速制御装置１は、変速機の制御を開始すると、アクセルペダルセンサ１７からアクセル開度を、ＥＣＵ１６からエンジン回転数をそれぞれ取得し、それらを基に目標変速比計算処理Ｄ３を実行し、目標変速比を算出する。変速制御装置１は、実際の変速比が目標変速比になるように変速機を制御する。 When the transmission control is started, the transmission control device 1 acquires the accelerator opening from the accelerator pedal sensor 17 and the engine speed from the ECU 16, and executes the target speed ratio calculation process D3 based on them to execute the target speed change. Calculate the ratio. The transmission control device 1 controls the transmission so that the actual transmission ratio becomes the target transmission ratio.
変速制御装置１は、変速機の制御を行う一方、並行して第１検出変速比と第２検出変速比を算出する。 The transmission control device 1 controls the transmission, and calculates the first detection speed ratio and the second detection speed ratio in parallel.
変速制御装置１は入力軸回転数センサ１１から入力された入力軸回転数と、出力軸回転数センサ１２から入力された出力軸回転数を基に、第１検出変速比計算処理Ｄ１を実行し、第１検出変速比を算出する。 The transmission control device 1 executes the first detection speed ratio calculation process D1 based on the input shaft rotational speed input from the input shaft rotational speed sensor 11 and the output shaft rotational speed input from the output shaft rotational speed sensor 12. The first detection gear ratio is calculated.
第１検出変速比計算処理Ｄ１は一般的に以下の数式で表される。
ｇｒ１＝ωｉｎ／ωｏｕｔ
ただし、
ｇｒ１: 第１検出変速比
ωｉｎ：入力軸回転数
ωｏｕｔ：出力軸回転数
となる。
The first detection gear ratio calculation process D1 is generally expressed by the following mathematical formula.
gr1 = ωin / ωout
However,
gr1: First detection gear ratio ωin: input shaft rotational speed ωout: output shaft rotational speed
また、第１検出変速比とは別に、車速センサ１８から車載ネットワーク２１にを介して取得した車速と、ＥＣＵ１６から車載ネットワーク２１にを介して取得したエンジン回転数を基に、第２検出変速比計算処理Ｄ２を実行し、第２検出変速比を算出する。 In addition to the first detected gear ratio, the second detected gear ratio is based on the vehicle speed acquired from the vehicle speed sensor 18 via the in-vehicle network 21 and the engine speed acquired from the ECU 16 via the in-vehicle network 21. A calculation process D2 is executed to calculate the second detection gear ratio.
第２検出変速比計算処理Ｄ２は一般的に以下の数式で表される。
ｇｒ２＝ Ａ ×ωｅｎｇ／（Ｖ／（ ２πｒ））
ただし、
ｇｒ２: 第２検出変速比
Ａ :駆動伝達系の構成要素による係数
ωｅｎｇ：エンジン回転数
Ｖ：車速
ｒ：駆動輪半径
となる。
The second detection gear ratio calculation process D2 is generally expressed by the following mathematical formula.
gr2 = A × ωeng / (V / (2πr))
However,
gr2: Second detection speed change ratio A: Coefficient depending on components of drive transmission system ωeng: engine speed V: vehicle speed r: drive wheel radius
ここでＡは、車両に搭載される駆動系の構成により決定されるパラメータとなる。例えばトルクコンバータの減速比や、前後進切替機構の歯車比などが要因としてあげられる。 Here, A is a parameter determined by the configuration of the drive system mounted on the vehicle. For example, the reduction ratio of the torque converter and the gear ratio of the forward / reverse switching mechanism can be cited as factors.
また、車両の構成により、車速の代わりに駆動輪１９の回転数が取得される場合は、車速の代わりに駆動輪１９の回転数を用いることができる。 Moreover, when the rotation speed of the drive wheel 19 is acquired instead of the vehicle speed due to the configuration of the vehicle, the rotation speed of the drive wheel 19 can be used instead of the vehicle speed.
変速制御装置１は、異常診断が必要とされる時に、目標変速比と、第１検出変速比と、第２検出変速比に基づき、異常診断Ｄ４を行う。異常診断が必要とされる時は、車両の状況に応じて決めることができる。例えば、車速が５ｋｍ／ｈ以上の時や、エンジン回転数が２０００ｒｐｍ以上の時など車両に応じて決定することができる。 When an abnormality diagnosis is required, the transmission control device 1 performs an abnormality diagnosis D4 based on the target transmission ratio, the first detection transmission ratio, and the second detection transmission ratio. When abnormality diagnosis is required, it can be determined according to the situation of the vehicle. For example, it can be determined according to the vehicle when the vehicle speed is 5 km / h or more, or when the engine speed is 2000 rpm or more.
この異常診断において、目標変速比と第１検出変速比と第２検出変速比は、変速機の正常動作時には、センサや計算により発生する誤差を除き、ほぼ等しい値となる事が期待される。逆に異常発生時には何れか、または全ての値が乖離することになる。その為、異常診断に使用する比較の組み合わせは、車両の形態、状況に応じて変更することができる。 In this abnormality diagnosis, the target speed ratio, the first detected speed ratio, and the second detected speed ratio are expected to be substantially equal values except for errors caused by sensors and calculations during normal operation of the transmission. Conversely, any or all of the values will deviate when an abnormality occurs. Therefore, the combination of comparisons used for abnormality diagnosis can be changed according to the form and situation of the vehicle.
図３は異常診断処理のフローチャートである。 FIG. 3 is a flowchart of the abnormality diagnosis process.
異常判定処理では、最初にエンジン回転数を取得し（ステップＳ１０１）、アクセル開度を取得し、（ステップＳ１０２）、目標変速比を算出する。（ステップＳ１０３）を行う。 In the abnormality determination process, first, the engine speed is acquired (step S101), the accelerator opening is acquired (step S102), and the target gear ratio is calculated. (Step S103) is performed.
次に、入力軸回転数を取得し（ステップＳ１０４）、出力軸回転数を取得し（ステップＳ１０５）、第１検出変速比の算出を行う（ステップＳ１０６）。そして、車速を取得し（ステップＳ１０７）、得られた車速と先に取得しているエンジン回転数と合わせて、第２検出変速比を算出する（ステップＳ１０８）。 Next, the input shaft rotational speed is acquired (step S104), the output shaft rotational speed is acquired (step S105), and the first detection speed ratio is calculated (step S106). Then, the vehicle speed is acquired (step S107), and the second detected gear ratio is calculated by combining the obtained vehicle speed and the previously acquired engine speed (step S108).
異常検出に必要な情報の取得の後、比較処理を行う。 After obtaining information necessary for detecting an abnormality, comparison processing is performed.
ステップＳ１０９において、前記目標変速比と前記第１検出変速比の比較を行い、二つの値の差が第１異常判定閾値を超えた状態が、定められた第１異常判定時間の間継続した場合、異常が発生している判断する。 In step S109, the target speed ratio and the first detection speed ratio are compared, and the state where the difference between the two values exceeds the first abnormality determination threshold value continues for the predetermined first abnormality determination time. Determine that an abnormality has occurred.
ステップＳ１１０において、目標変速比と第２検出変速比の比較も行う。目標変速比と第２検出変速比の第２異常判定閾値を超えた状態が、定められた第２異常判定時間の間継続した場合、異常が発生していると判断する。 In step S110, the target speed ratio and the second detected speed ratio are also compared. If the state where the target abnormality ratio and the second detection speed ratio exceed the second abnormality determination threshold value continues for the predetermined second abnormality determination time, it is determined that an abnormality has occurred.
ステップＳ１１１において、第１検出変速比と第２検出変速比の比較も行う。第１検出変速比と第２検出変速比の差が、第３異常判定閾値を超えた状態が、定められた第３異常判定時間の間継続した場合、異常が発生していると判断する。 In step S111, the first detection speed ratio and the second detection speed ratio are also compared. If the state where the difference between the first detection speed ratio and the second detection speed ratio exceeds the third abnormality determination threshold value continues for a predetermined third abnormality determination time, it is determined that an abnormality has occurred.
この場合の第１異常判定閾値と、第２異常判定閾値と、第１異常判定時間と、第２異常判定時間は、車両の形態や車両の置かれた状況、走行状態に応じて定めることが出来る。 In this case, the first abnormality determination threshold, the second abnormality determination threshold, the first abnormality determination time, and the second abnormality determination time may be determined according to the form of the vehicle, the situation where the vehicle is placed, and the running state. I can do it.
正常と判定された場合は、正常処理を行う（ステップＳ１１２）。 If it is determined to be normal, normal processing is performed (step S112).
異常と判定された場合は、安全確保のための異常処理を行う。（ステップＳ１１３）
図４は異常診断処理のフローチャートである。図３と異なる点は、異常判定処理において、ステップＳ２０９での第１検出変速比と目標変速比の比較、ステップＳ２１０での第２検出変速比と目標変速比の比較、といったように、比較処理を限定して実施している点にある。
When it is determined that there is an abnormality, an abnormality process for ensuring safety is performed. (Step S113)
FIG. 4 is a flowchart of the abnormality diagnosis process. The difference from FIG. 3 is that in the abnormality determination process, a comparison process such as a comparison between the first detection speed ratio and the target speed ratio in step S209 and a comparison between the second detection speed ratio and the target speed ratio in step S210. It is in the point which is carried out by limiting.
図５は異常診断処理のフローチャートである。図３と異なる点は、異常判定処理において、ステップＳ３０９での第１検出変速比と目標変速比の比較、ステップＳ３１０での第２検出変速比と第１検出変速比の比較、といったように、比較処理を限定して実施している点にある。 FIG. 5 is a flowchart of the abnormality diagnosis process. 3 differs from FIG. 3 in the abnormality determination process, such as comparing the first detected gear ratio and the target gear ratio in step S309, comparing the second detected gear ratio and the first detected gear ratio in step S310, and so on. The comparison process is limited.
変速制御装置１は、前記異常診断により異常を検出した場合、車両の安全を確保するために必要な措置を行うことができる。この場合の必要な措置については、車両の形態、状況に応じて選択することができる。 The shift control device 1 can perform necessary measures to ensure the safety of the vehicle when an abnormality is detected by the abnormality diagnosis. Necessary measures in this case can be selected according to the form and situation of the vehicle.
例えば、元圧制御弁１３に接続された元圧制御弁制御用ソレノイド１４を制御し、プライマリプーリ制御用油圧制御装置６とセカンダリプーリ制御用油圧制御装置７に供給される油圧を停止させることで、変速比制御を停止させることができる。また、クラッチの接続を解除し、エンジン１５から駆動輪１９に至る駆動力の伝達を切断し、車両を停止させることもできる。また、変速比をＬｏ側に固定することとで、最低限の走行能力を残すような措置を行うこともできる。 For example, the main pressure control valve control solenoid 14 connected to the main pressure control valve 13 is controlled to stop the hydraulic pressure supplied to the primary pulley control hydraulic control device 6 and the secondary pulley control hydraulic control device 7. The transmission ratio control can be stopped. Further, the clutch can be disconnected, the transmission of the driving force from the engine 15 to the driving wheel 19 can be cut off, and the vehicle can be stopped. In addition, by fixing the gear ratio to the Lo side, it is possible to take measures to leave a minimum travel capability.
以上のように、目標変速比と第１検出変速比と第２検出変速比を異常診断に使用し、少なくとも２通りの比較を行うことで、異常検出の冗長性を確保することができる。 As described above, the target speed ratio, the first detected speed ratio, and the second detected speed ratio are used for abnormality diagnosis, and at least two kinds of comparisons are performed, thereby ensuring redundancy of abnormality detection.
仮に、出力軸回転数センサ１２、又は入力軸回転数センサ１１と、プーリ制御用の油圧制御に同時に異常が発生する場合、目標変速比と第１検出変速比のみで異常診断を行うと、異常が発生しているのにもかかわらず正常動作と判断してしまう可能性がある。しかし、異なる二つの検出変速比を異常診断に用いることで、異常診断に冗長性を持たせることとなり、確実に異常を検出し、安全確保に必要な措置を実施することが可能となる。 If an abnormality occurs simultaneously in the output shaft rotational speed sensor 12 or the input shaft rotational speed sensor 11 and the hydraulic control for pulley control, if an abnormality diagnosis is performed using only the target gear ratio and the first detection gear ratio, There is a possibility that it is determined to be normal operation despite the occurrence of the error. However, by using two different detection gear ratios for abnormality diagnosis, the abnormality diagnosis is made redundant, so that it is possible to reliably detect abnormality and implement measures necessary for ensuring safety.
１ 変速制御装置
２ 入力軸
３ プライマリプーリ
４ セカンダリプーリ
５ ベルト
６ プライマリプーリ制御用油圧制御装置
７ セカンダリプーリ制御用油圧制御装置
８ プライマリプーリ制御用ソレノイド
９ セカンダリプーリ制御用ソレノイド
１０ 出力軸
１１ 入力軸回転数センサ
１２ 出力軸回転数センサ
１３ 元圧制御弁
１４ 元圧制御弁ソレノイド
１５ エンジン
１６ エンジン制御装置（ＥＣＵ）
１７ アクセルペダルセンサ
１８ 車速センサ
１９ 駆動輪
２０ オイルポンプ（プーリ制御用油圧供給源）
２１ 車載ネットワーク
DESCRIPTION OF SYMBOLS 1 Shift control device 2 Input shaft 3 Primary pulley 4 Secondary pulley 5 Belt 6 Hydraulic control device for primary pulley control 7 Hydraulic control device for secondary pulley control 8 Primary pulley control solenoid 9 Secondary pulley control solenoid 10 Output shaft 11 Input shaft rotation Number sensor 12 Output shaft rotation speed sensor 13 Original pressure control valve 14 Original pressure control valve solenoid 15 Engine 16 Engine control device (ECU)
17 Accelerator pedal sensor 18 Vehicle speed sensor 19 Drive wheel 20 Oil pump (hydraulic supply source for pulley control)
21 In-vehicle network
Claims (5)
エンジンと接続される入力軸に設けられる回転数センサから取得される入力軸回転数と、駆動輪と接続される出力軸に設けられる回転数センサから取得される出力軸回転数とに基づいて、第１検出変速比を算出する第１検出変速比算出手段と、
を備える無段変速機の変速制御装置において、
エンジン回転数、車速に基づいて第２検出変速比を算出する第２検出変速比算出手段を備え、
前記目標変速比と、前記第１検出変速比と、前記第２検出変速比とに基づいて前記無段変速機の異常を判断することを特徴とする無段変速機の変速制御装置。 Target gear ratio calculating means for calculating the target gear ratio based on the engine speed and the accelerator opening;
Based on the input shaft rotational speed obtained from the rotational speed sensor provided on the input shaft connected to the engine and the output shaft rotational speed obtained from the rotational speed sensor provided on the output shaft connected to the drive wheel, First detection speed ratio calculating means for calculating a first detection speed ratio;
In the continuously variable transmission control device comprising:
A second detection speed ratio calculating means for calculating a second detection speed ratio based on the engine speed and the vehicle speed;
A transmission control apparatus for a continuously variable transmission, wherein abnormality of the continuously variable transmission is determined based on the target gear ratio, the first detected gear ratio, and the second detected gear ratio.
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