JP4214698B2 - Vehicle transmission judging device - Google Patents

Description

ここで、（１）式中、Nt，Nf，Ｒ，Ｗは自動車諸元であり、Ntは、１速ギア比（トランスミッション減速比）、Nfは、ファイナルギア比（ファイナルドライブ減速比）、Ｒは、タイヤ半径、Ｗは、自動車重量をそれぞれ示し、それら自動車諸元の値は（１）式に予め代入される。
【００２７】
次に、ステップS6で、発進速度の時（１速で走行できる速度以下の時）に、前述の前後加速度検出手段で検出した自動車の前後加速度Ｇの値が、先のステップS5で推定した自動車の前後加速度Geの値よりも大きいか（Ｇ＞Ge）否かを判断する。その結果、ステップS6で、前後加速度Ｇの値が前後加速度Geの値よりも大きい（Ｇ＞Ge）と判断した場合には、ステップS7に進む。この一方、ステップS6で、前後加速度Ｇの値が前後加速度Geの値よりも大きくない（Ｇ≦Ge）と判断した場合には、ステップS8に進む。そして、ステップS8に進むと、このステップS8とこれに続くステップS9とで、さらに、自動車用変速機がトルクコンバータ付きの自動変速機であるか否かを、上記ステップS5，S6と異なる方法で判断する。
【００２８】
ここでは、先ず、ステップS8で、前述の入力側回転数検出手段で検出されたエンジン回転数Neの値から推定駆動輪回転数Ndeを以下に示す（２）式を用いて算出する。なお、上記（１）式と同様に、ここでも、Ntはトランスミッション減速比、Nfはファイナルドライブ減速比をそれぞれ示している。
【数２】

【００２９】
次に、ステップS9で、先のステップS8で算出した推定駆動輪回転数Ndeの値と、出力側回転数検出手段で検出された駆動輪回転数Ndの値とを比較する。その結果、Nde ＞ Ndであると判断した場合には、ステップS7に進む。この一方、Nde ＞ Nd でない（Nde ≦ Nd）と判断した場合には、ステップS10に進み、ステップS10で、変速機の種類をMTと判定して、本フローチャートの処理を終了する。
【００３０】
また、先に述べたように、ステップS6又はステップS9からステップS7に進む場合、自動車用変速機がトルクコンバータ付きの自動変速機である可能性が高いが、誤判断を確実に防止するために、さらなる駆動状態検出手段である断接検出手段としてのステップS7で、MTにおけるクラッチ操作による入力信号の有無を判断する。その結果、入力信号が有ると判断した場合には、前述のステップS10に進み、変速機の種類をＭＴと判定して、本フローチャートの処理を終了する。
【００３１】
その一方、上記ステップS7で、クラッチ操作による入力信号が無いと判断した場合には、ステップS11に進み、入力側回転数検出手段で検出されたエンジン回転数Neの値の変化が連続的であるか否かを判断する。このステップS11で、エンジン回転数Neの値の変化が連続的である場合には、前述のステップS4に進み、変速機の種類をＣＶＴと判定して本フローチャートの処理を終了する。この一方、このステップS11で、エンジン回転数Neの変化が連続的でないと判断した場合には、前述のステップS2に進み、変速機の種類をＡＴと判定して本フローチャートの処理を終了する。従ってステップ S2 、ステップ S4 およびステ ップ S10 は、変速機種類判断手段に相当する。
【００３２】
なお、上記ステップS11では、エンジン回転数Neと駆動輪回転数Ndとの比の単位時間当たりの変化量を算出し、その変化量が、予め設定した所定値より小さいと判断した場合に、エンジン回転数Neの変化が連続的であると判断し、それ以外の場合に、エンジン回転数Neの変化が連続的でないと判断する。また、エンジン回転数Neと駆動輪回転数Ndとの比によりエンジン回転数が連続的であるか否かを判断する代わりに、エンジン回転数Neと駆動輪回転数Ndとの偏差を求めることでエンジン回転数の変化が連続的であるか否かを判断することもできる。
【００３３】
さらに、本実施例の自動車用制御装置では、上述のようにして図１に示すフローチャートの処理により、変速機の種類をＭＴ、ＡＴ又はＣＶＴと判定してそのフローチャートの処理を終了すると、次に、図２に示す、変速機の通信異常を判断するフローチャートの処理を開始する。
【００３４】
図２に示すフローチャートでは、先ず、ステップS21で、上記図１に示すフローチャートの処理による変速機種類の判定結果を読み込んでその変速機種類を判別する。その結果、変速機種類が、ＡＴである場合にはステップＳ22に進み、またＣＶＴである場合にはステップS23に進むが、ＭＴと判断した場合には、本フローチャートの処理を終了する。
【００３５】
そして、ステップS21からステップS22に進むと、このステップS2２で、ＡＴの具えるコントローラからの通信データの有無を判断し、通信データ有りと判断した場合には、コントローラの通信の異常が発生していないことから、本フローチャートの処理を終了する。この一方、ステップS22で、通信データ無しと判断した場合には、ステップS24に進み、このステップS24で、ＡＴの具えるコントローラの通信の異常と判断して、本フローチャートの処理を終了する。
【００３６】
また、ステップS21からステップS23に進むと、このステップS23で、ＣＶＴの具えるコントローラからの通信データの有無を判断し、通信データ有りと判断した場合には、通信異常が発生してないことから、本フローチャートの処理を終了する。この一方、ステップS23で、通信データ無しと判断した場合には、ステップS25に進み、このステップS25で、ＣＶＴの具えるコントローラの通信の異常と判断して、本フローチャートの処理を終了する。
【００３７】
上述のようにして、図２に示すフローチャートの処理により、ステップS22又はステップS23で、コントローラからの通信データの有無を判断することで、変速機が自動変速機であってデータを出力するデータ出力手段としてのコントローラを備えるものであるか否かを判断し、変速機からの通信データが入力されない場合に、ステップS24又はステップS25で、変速機のコントローラの通信の異常と判断する。従ってステップ S24 およびステップ S25 も、変速機種類判断手段に相当する。
【００３８】
これにより、上記ステップS24又はステップS25で、ＡＴ又はＣＶＴの通信の異常を判断した場合には、例えば、ＡＴ又はＣＶＴの通信の異常を知らせるために自動車に設けたランプを点滅させる等により、自動車の運転者等に変速機の通信異常を警報することができる。
【００３９】
かかる構成の本実施例の自動車用変速機判断装置にあっては、前後加速度推定手段（図１中ステップS5）で推定された自動車の前後加速度Geに対して、前後加速度検出手段で検出された自動車の前後加速度Ｇが大きい場合には、トルクコンバータの作用によってMTと異なる加速度が発生していることから、かかる場合にトルクコンバータ付きの変速機であると判断する（図１中ステップS6）。
【００４０】
従って、本実施例の自動車用変速機判断装置によれば、自動車用変速機が自動変速機（ＡＴ又はＣＶＴ）である場合にそのコントローラの結線が外れていても、ＡＴ又はＣＶＴであることを判断でき、ＭＴであると誤判断することを防止することができる。これにより、正確な変速機種類の情報をＡＢＳ等のシステムに伝達できるから、ＡＢＳ等のシステムでは、適切なパラメータや制御内容への切り替えが可能となり、変速機種類に応じた適切な制御を行うことができる。
【００４１】
しかも、本実施例の自動車用変速機判断装置にあっては、エンジン回転数Neと駆動輪回転数（左右平均）Ndとの偏差が所定値（推定駆動輪回転数Nde）より大きい場合（トルクコンバータのスリップ時）に、トルクコンバータ付きの変速機と判断する（図１中ステップS9）。これにより、上述の効果に加えて、トルクコンバータ付きの変速機であるか否かをより確実に判断できる。
【００４２】
さらに、本実施例では、図１中ステップS11において、エンジン回転数Neと駆動輪回転数Ndとの比の単位時間当たりの変化量を算出し、その変化量が、予め設定した所定値より小さいと判断した場合に、エンジン回転数Neの変化が連続的であると判断し、それ以外の場合に、エンジン回転数Neの変化が連続的でないと判断する。
【００４３】
ところで、ＡＴ車又はＭＴ車の場合には、自動車速度の上昇に伴い、ギア比が不連続で変化するためにエンジン回転数は鋸刃状に変化する一方、ＣＶＴ車の場合には、エンジン回転数は連続的に変化し、駆動輪回転数（駆動輪速）Ndと変速機の出力回転数との関係も連続的なものとなる。このことから、上述のようにして、ステップS11でエンジン回転数Neの変化が連続的であるか否かを判断することにより、ＣＶＴ車であるか否かを確実に判断できる。
【００４４】
また、図１中ステップS7で、クラッチの断接操作による入力信号を検出した場合に手動変速機であると判断する。これにより、ＭＴ車では、必ずクラッチの断接操作をする必要があることから、クラッチの断接操作による入力信号を検出することで、手動変速機であることを確実に特定できる。
【００４５】
また、本実施例の自動車用変速機判断装置では、図２に示すフローチャートの処理を行うことにより、上記図１に示すフローチャートの処理を行った結果、自動車用変速機が自動変速機であると判断しても、変速機からの通信データが入力されない場合には、変速機からの通信の異常であると判断する（図２中ステップS21〜ステップS25）。これにより、車両用変速機が自動変速機（ＡＴ又はＣＶＴ）である場合にそのコントローラの結線が外れていても、誤って手動変速機と判断することなく、変速機のコントローラの接続不良等の通信異常の発生を検出して、運転者等に警報することができる。
【００４６】
以上、図示例に基づき説明したが、本発明は、上記実施例のものに限れるものではない。例えば、上記実施例においては、図１中ステップS11で、エンジン回転数Neの値の変化により、ＡＴとＣＶＴとを判別しているが、これに代えてステップS11で以下のような処理を行うこととしても良い。即ち、エンジントルクTeの単位時間あたりの変化量が所定以上の場合（変速時の内燃機関の出力トルクの変化が大きい場合）に、ステップS2に進みＡＴであると判断し、そうでない場合に、ステップS4に進みＣＶＴであると判断する。このようにすれば、ＡＴ車の場合、変速時に内燃機関と協調制御を行い内燃機関の出力トルクの低減制御が行われることから、かかる内燃機関の出力トルクの低減状態を検出することで、車両用変速機がＡＴであることを確実に判断できる。
【００４７】
なお、トルクコンバータ付きの自動変速機であることを判断するために用いられる自動車諸元は、上記実施例における自動車諸元に限られず、本発明では内燃機関の出力軸から車軸までの動力伝達系及びタイヤ半径で決定されることはもちろんである。
【図面の簡単な説明】
【図１】 本発明の車両用変速機判断装置の一実施例である自動車用変速機判断装置において変速機種類を判別する処理手順を示すフローチャートである。
【図２】 上記実施例の自動車用変速機判断装置において変速機の通信異常を判断する処理手順を示すフローチャートである。
【符号の説明】
Ｇ 検出される自動車の前後加速度
Ge 推定される自動車の前後加速度
Ne エンジン回転数
Nd 駆動輪回転数（左右平均）
Nde 推定駆動輪回転数
Nf ファイナルギア比（ファイナルドライブ減速比）
Nt １速ギア比（トランスミッション減速比）
Te エンジントルク
Ｒ タイヤ半径
Ｗ 自動車重量[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a vehicle transmission determination device that automatically determines the type of a vehicle transmission in a vehicle control device.
[0002]
[Prior art]
  Conventionally, for vehicles, control such as anti-lock braking system (ABS) and traction control (TCS) that control the force in the front-rear direction, or vehicle dynamics control (VDC) that is a yaw control device by braking force, etc. The system is used. In such a control system, in order to perform optimal control according to the type of transmission installed in the vehicle, processing such as switching parameters and control contents depending on the type of transmission installed in the vehicle is performed. Has been made.
[0003]
  Therefore, as a method for automatically discriminating the transmission type for sending data capable of identifying the type of transmission mounted on the vehicle to the control system, for example, there is the following method. That is, in the case of a vehicle (AT vehicle, CVT vehicle, etc.) equipped with a transmission (automatic transmission) having a controller, since communication data is output from the controller, depending on the presence or absence of communication data output from the controller, It is determined whether the transmission is an automatic transmission (AT or CVT) or a manual transmission (MT). Further, when it is determined that the transmission is an automatic transmission (AT or CVT), the transmission mounted on the vehicle is identified by identifying whether it is AT or CVT based on identification data included in communication data with the controller. The type of was automatically determined.
[0004]
[Problems to be solved by the invention]
  However, the conventional automatic discrimination device of the above transmission type is configured such that when the ignition is turned on for the first time, the presence or absence of communication data is discriminated and the discrimination result is stored, and then the discrimination result is not updated. Therefore, in the case of an AT vehicle or CVT vehicle, if the communication line of the controller of the automatic transmission is disconnected at the time of determining the transmission type, even if it is an automatic transmission, there is no communication. Make a mistake. Accordingly, there is a problem that a system such as ABS that has received the erroneous data cannot perform appropriate control of the vehicle without switching to appropriate parameters and control contents.
[0005]
  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle transmission determination device that can advantageously solve the above-described problems and transmit accurate transmission type information to a system such as ABS.
[0006]
[Means for solving the problems and their functions and effects]
  thisA vehicle transmission determining apparatus according to an aspect of the present invention is a vehicle transmission that shifts the rotational speed output from an internal combustion engine and transmits it to an axle.The type ofIn the vehicle transmission determining device for determining,Drive state detection means for detecting the drive state of the vehicle at the time of the first ignition ON, and transmission type determination means for determining the type of the transmission based on the drive state of the vehicle. Is.
  Specifically, the vehicle transmission determining apparatus according to the first aspect of the present invention is the vehicle transmission determining apparatus that determines whether or not the transmission is an automatic transmission with a torque converter. The drive state detection means isTorque detection means for detecting the output torque of the internal combustion engine; longitudinal acceleration detection means for detecting longitudinal acceleration of the vehicle; longitudinal acceleration estimation means for estimating the longitudinal acceleration of the vehicle based on the output torque of the internal combustion engine; ThePossess,The transmission type determining means isWhen the longitudinal acceleration of the vehicle detected by the longitudinal acceleration detection means is larger than the longitudinal acceleration of the vehicle estimated by the longitudinal acceleration estimation means, the automatic transmission with a torque converter is determined. It is what.
[0007]
  This first aspectIn the invention ofThe drive state detection means isOutput torque of the internal combustion engine with torque detection meansThedetectionShiThe longitudinal acceleration of the vehicle is detected by the longitudinal acceleration detection means.ThedetectionShiThe longitudinal acceleration of the vehicle based on the output torque of the internal combustion engine by the longitudinal acceleration estimating meansTheEstimatedYouThe And when the longitudinal acceleration of the vehicle detected by the longitudinal acceleration detecting means is larger than the longitudinal acceleration of the vehicle estimated by the longitudinal acceleration estimating means,The transmission type determining means is configured so that the transmissionJudged to be an automatic transmission with a torque converter.
[0008]
  Therefore,First aspectAccording to this invention, when the longitudinal acceleration of the vehicle detected by the longitudinal acceleration detecting means is larger than the longitudinal acceleration of the vehicle estimated by the longitudinal acceleration estimating means, it differs from the manual transmission due to the action of the torque converter. Since acceleration has occurred, it can be determined that this is a transmission with a torque converter. Accordingly, even immediately after the first ignition is turned on, it can be determined that the transmission is an automatic transmission, and thus accurate transmission type information can be transmitted to a system such as ABS. Therefore, in a system such as ABS, it is possible to switch to appropriate parameters and control contents, and it is possible to perform appropriate control of the vehicle according to the type of transmission.
[0009]
  Also,thisInventionOf the second aspectThe vehicle transmission determination device isAboveThe transmission is an automatic transmission with a torque converteror notTo judgeAboveIn the vehicle transmission determination device,The driving state detecting means isInput-side rotation speed detection means for detecting the rotation speed on the input side of the transmission; and output-side rotation speed detection means for detecting the rotation speed on the output side of the transmission,The transmission type determining means isWhen the deviation between the rotational speed on the input side and the rotational speed on the output side is greater than a predetermined value, it is determined that the automatic transmission has a torque converter.
[0010]
  This second aspectIn this invention, when the deviation between the rotational speed on the input side of the transmission and the rotational speed on the output side of the transmission is greater than a predetermined value (when the torque converter slips), it is determined that the transmission is equipped with a torque converter. To do. So thisSecond aspectAccording to the invention, when the transmission of the vehicle is an automatic transmission, even if the connection of the controller is disconnected, it can be determined that the transmission is an automatic transmission, thereby preventing erroneous determination that the transmission is a manual transmission. can do. Therefore, since accurate transmission type information can be transmitted to a system such as ABS, the system such as ABS can be switched to an appropriate parameter or control content, and the vehicle can be controlled appropriately according to the transmission type. It can be performed.
[0011]
  thisInventionOf the third aspectThe vehicle transmission determination device isAboveThe transmission is a stepped automatic transmissionWhether or notto decideAboveIn the vehicle transmission determination device,The driving state detecting means isComprising torque detection means for detecting the output torque of the internal combustion engine;The transmission type determining means isWhen the amount of change per unit time in the output torque of the internal combustion engine is equal to or greater than a predetermined value, it is determined that the output is a stepped automatic transmission.
[0012]
  This third aspectAccording to the invention, when the change amount per unit time of the output torque of the internal combustion engine is equal to or larger than the predetermined value, that is, when the change of the output torque of the internal combustion engine during the shift is large, the stepped automatic transmission It can be judged that there is. That is, in the case of a vehicle equipped with a stepped automatic transmission, the reduction control of the output torque of the internal combustion engine is detected because the control of the output torque of the internal combustion engine is controlled by performing cooperative control with the internal combustion engine at the time of shifting. This makes it possible to reliably determine that the transmission of the vehicle is a stepped automatic transmission.
[0013]
  Therefore, when the transmission of the vehicle is a stepped automatic transmission, even if the connection of the controller is disconnected, it is possible to prevent erroneous determination that the transmission is a manual transmission. Since information can be transmitted to a system such as ABS, the system such as ABS can be switched to appropriate parameters and control contents, and appropriate control of the vehicle according to the type of transmission can be performed.
[0014]
  thisInventionOf the fourth aspectThe vehicle transmission determination device isAboveThe transmission is a continuously variable automatic transmissionWhether or notto decideAboveIn the vehicle transmission determination device,The driving state detecting means isInput-side rotation speed detection means for detecting the rotation speed on the input side of the transmission; and output-side rotation speed detection means for detecting the rotation speed on the output side of the transmission,The transmission type determining means isWhen the change amount per unit time of the ratio or deviation between the input side rotational speed and the output side rotational speed is smaller than a predetermined value, it is determined as a continuously variable automatic transmission. Is.
[0015]
  By the way, in a vehicle (for example, MT vehicle, AT vehicle) equipped with a transmission other than a continuously variable automatic transmission, the rotational speed on the input side of the transmission and the output side of the transmission are increased as the vehicle speed increases. The ratio or deviation from the rotational speed changes discontinuously. On the other hand, in a vehicle equipped with a continuously variable automatic transmission, there is a difference between the rotational speed on the input side of the transmission and the rotational speed on the output side of the transmission. The ratio or deviation changes continuously.
[0016]
  Therefore,This fourth aspectAccording to the invention, when the change amount per unit time of the ratio or deviation between the rotational speed on the input side and the rotational speed on the output side is smaller than the predetermined value, the rotational speed output by the internal combustion engine continuously changes. Therefore, it can be determined that the transmission is a continuously variable automatic transmission. Therefore, in the case of an automatic transmission having a controller, even if the connection of the controller is disconnected, it can be prevented from being erroneously determined to be a manual transmission, and a stepped automatic transmission ( It is possible to distinguish between AT) and continuously variable automatic transmission (CVT). As a result, accurate transmission type information can be transmitted to a system such as an ABS, so that the system such as an ABS can be switched to appropriate parameters and control contents, and the vehicle can be controlled appropriately according to the transmission type. It can be performed.
[0017]
  thisInventionOf the fifth aspectThe vehicle transmission determination device isAboveIn the invention of the vehicle transmission determination device,The transmission type determining means isThe transmissionButWhen the automatic transmission is provided with data output means for outputting data, and the data from the transmission is not input even if the vehicle transmission determination device determines that the transmission is an automatic transmission Is characterized in that the communication from the transmission is abnormal.
[0018]
  This fifth aspectAccording to the invention, even if it is determined that the transmission is an automatic transmission, if data is not output from the transmission, it is determined that an abnormality has occurred in communication from the controller of the transmission. When the vehicle transmission is a stepped automatic transmission, even if the controller is disconnected, a communication error such as a connection failure of the controller of the transmission is generated without erroneously determining that the transmission is a manual transmission. It can detect and alert a driver or the like.
[0019]
  thisInventionOf the sixth aspectThe vehicle transmission determination device isAboveThe transmission is a manual transmissionor notTo judgeAboveIn the vehicle transmission determination device,The driving state detecting means isAn on / off detection means for detecting the on / off of a clutch inserted between the internal combustion engine and the axle and capable of connecting / disconnecting the output of the internal combustion engine;The transmission type determining means isEven if it is determined that the vehicle transmission determination device is an automatic transmission first, if the connection / disconnection detection unit detects the connection / disconnection of the clutch, it is determined that the transmission is a manual transmission. It is what.
[0020]
  This sixth aspectAccording to the invention, in a vehicle equipped with a manual transmission, since it is necessary to always engage and disengage the clutch before the vehicle starts, it is possible to detect the engagement / disengagement of the clutch even once. By determining that the transmission is a manual transmission, it is possible to ensure the identification when the vehicle is equipped with a manual transmission.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a flowchart showing a processing procedure for discriminating a transmission type in a vehicle transmission determination device which is an embodiment of a vehicle transmission determination device of the present invention, and FIG. 2 is a vehicle transmission of this embodiment. It is a flowchart which shows the process sequence which judges the communication abnormality of a transmission in a judgment apparatus.
[0022]
  The vehicle transmission determining apparatus according to the present embodiment determines the type (MT, AT, or CVT) of the vehicle transmission that shifts the rotational speed output from the engine (internal combustion engine) of the vehicle as a vehicle and transmits it to the axle. To do. And this transmission determination device for automobiles isAs drive state detection means,Torque detection means for detecting the output torque of the engine, longitudinal acceleration detection means for detecting the longitudinal acceleration of the automobile, input side rotation speed detection means for detecting the rotation speed on the input side of the transmission, and output side of the transmission Output-side rotation speed detection means for detecting the rotation speed. Each of these detecting means is constituted by various sensors (engine output torque measuring sensor, longitudinal acceleration sensor, rotational speed measuring sensor, wheel speed sensor) (not shown) attached at predetermined positions of the automobile. Note that general-purpose products are used for the various sensors here.
[0023]
  According to the various sensors described above, the engine output torque Te is the sensor for measuring the output torque of the engine constituting the torque detection means, the longitudinal acceleration G of the automobile is the longitudinal acceleration sensor constituting the longitudinal acceleration detection means, and the input side rotational speed is The engine speed Ne as the input speed of the transmission is measured by the sensor for measuring the speed constituting the detecting means, and the driving wheel speed (average of left and right) Nd as the output speed of the transmission is determined by the wheel speed sensor. Detected.
[0024]
  Then, the processing of the flowchart shown in FIG. 1 is performed as a processing procedure for determining the transmission type in the vehicle transmission determination device of the present embodiment. That is, the processing of the flowchart is started when the ignition key of the automobile is turned on. In this flowchart, first, the process of step S1 is performed. In this step S1, the AT automatically included in the communication data from the controller of the transmission in the case of AT or CVT, in the same way as the method of automatically discriminating the transmission type generally performed in the past. The presence / absence of communication data from the AT is determined based on identification data for identifying the CVT and the CVT.
[0025]
  If it is determined in step S1 that there is communication data from the AT, the process proceeds to step S2, the transmission type is determined to be AT, and the process of this flowchart ends. On the other hand, if it is determined in step S1 that there is no communication data from the AT, the process proceeds to step S3 to determine the presence or absence of communication data from the CVT. As a result, if it is determined in step S3 that there is communication data from the CVT, the process proceeds to step S4. In step S4, the type of transmission is determined to be CVT, and the processing of this flowchart ends. On the other hand, if it is determined in step S3 that there is no communication data from the CVT, the process proceeds to step S5.
[0026]
  When the process proceeds to step S5, it is determined in step S5 and subsequent step S6 whether or not the transmission is an automatic transmission with a converter. Here, first,Further drive state detection meansIn step S5 as the longitudinal acceleration estimating means, the value of the engine output torque Te detected by the torque detecting means described above is substituted into the following equation (1) to estimate the longitudinal acceleration Ge value of the automobile.
[Expression 1]

  In the equation (1), Nt, Nf, R, and W are vehicle specifications, Nt is the first gear ratio (transmission reduction ratio), Nf is the final gear ratio (final drive reduction ratio), R Indicates the tire radius and W indicates the weight of the vehicle, respectively, and the values of the vehicle specifications are substituted in advance in equation (1).
[0027]
  Next, in step S6, the vehicle longitudinal acceleration G detected by the above-described longitudinal acceleration detection means at the start speed (when the vehicle is traveling at the first speed or less) is estimated in step S5. It is determined whether or not the longitudinal acceleration Ge is greater than (G> Ge). As a result, when it is determined in step S6 that the value of the longitudinal acceleration G is larger than the value of the longitudinal acceleration Ge (G> Ge), the process proceeds to step S7. On the other hand, if it is determined in step S6 that the value of the longitudinal acceleration G is not greater than the value of the longitudinal acceleration Ge (G ≦ Ge), the process proceeds to step S8. Then, when proceeding to step S8, in step S8 and subsequent step S9, whether or not the vehicle transmission is an automatic transmission with a torque converter is determined by a method different from steps S5 and S6. to decide.
[0028]
  Here, first, in step S8, the estimated driving wheel rotational speed Nde is calculated from the value of the engine rotational speed Ne detected by the input side rotational speed detecting means using the following equation (2). Note that Nt represents the transmission reduction ratio and Nf represents the final drive reduction ratio, as in the above equation (1).
[Expression 2]

[0029]
  Next, in step S9, the value of the estimated driving wheel rotational speed Nde calculated in the previous step S8 is compared with the value of the driving wheel rotational speed Nd detected by the output side rotational speed detecting means. As a result, if it is determined that Nde> Nd, the process proceeds to step S7. On the other hand, if it is determined that Nde> Nd is not satisfied (Nde ≦ Nd), the process proceeds to step S10. In step S10, the transmission type is determined to be MT, and the process of this flowchart is terminated.
[0030]
  In addition, as described above, when the process proceeds from step S6 or step S9 to step S7, there is a high possibility that the vehicle transmission is an automatic transmission with a torque converter. ,As connection / disconnection detection means which is further drive state detection meansIn step S7, it is determined whether there is an input signal due to clutch operation in MT. As a result, if it is determined that there is an input signal, the process proceeds to step S10 described above, the transmission type is determined to be MT, and the process of this flowchart is terminated.
[0031]
  On the other hand, if it is determined in step S7 that there is no input signal due to clutch operation, the process proceeds to step S11, and the change in the value of the engine speed Ne detected by the input-side speed detection means is continuous. Determine whether or not. If the change in the value of the engine speed Ne is continuous in step S11, the process proceeds to step S4 described above, the transmission type is determined as CVT, and the process of this flowchart is terminated. On the other hand, if it is determined in step S11 that the change in the engine speed Ne is not continuous, the process proceeds to step S2 described above, the transmission type is determined to be AT, and the processing of this flowchart ends.So step S2 , Step S4 And Up S10 Corresponds to transmission type determination means.
[0032]
  In step S11, the amount of change per unit time of the ratio between the engine speed Ne and the drive wheel speed Nd is calculated, and when it is determined that the amount of change is smaller than a predetermined value, the engine It is determined that the change in the rotational speed Ne is continuous. In other cases, it is determined that the change in the engine rotational speed Ne is not continuous. Further, instead of determining whether the engine speed is continuous based on the ratio between the engine speed Ne and the drive wheel speed Nd, the deviation between the engine speed Ne and the drive wheel speed Nd is obtained. It can also be determined whether or not the change in engine speed is continuous.
[0033]
  Further, in the vehicle control apparatus of the present embodiment, when the transmission type is determined to be MT, AT, or CVT by the process of the flowchart shown in FIG. 2. The process of the flowchart shown in FIG. 2 for determining a transmission communication abnormality is started.
[0034]
  In the flowchart shown in FIG. 2, first, in step S21, the transmission type determination result obtained by the processing of the flowchart shown in FIG. 1 is read to determine the transmission type. As a result, if the transmission type is AT, the process proceeds to step S22. If the transmission type is CVT, the process proceeds to step S23. If it is determined that the transmission type is MT, the process of this flowchart ends.
[0035]
  Then, when the process proceeds from step S21 to step S22, in this step S22, it is determined whether or not there is communication data from the controller included in the AT. If it is determined that there is communication data, an abnormality in the communication of the controller has occurred. Therefore, the process of this flowchart is terminated. On the other hand, if it is determined in step S22 that there is no communication data, the process proceeds to step S24. In step S24, it is determined that the communication of the controller included in the AT is abnormal, and the process of this flowchart is terminated.
[0036]
  Further, when the process proceeds from step S21 to step S23, it is determined in this step S23 whether or not there is communication data from the controller included in the CVT, and if it is determined that there is communication data, no communication abnormality has occurred. Then, the process of this flowchart ends. On the other hand, if it is determined in step S23 that there is no communication data, the process proceeds to step S25. In step S25, it is determined that the communication of the controller including the CVT is abnormal, and the process of this flowchart ends.
[0037]
  As described above, by the processing of the flowchart shown in FIG. 2, in step S22 or step S23, it is determined whether or not there is communication data from the controller. It is determined whether or not a controller as a means is provided, and when communication data from the transmission is not input, it is determined in step S24 or step S25 that the transmission controller communication is abnormal.So step S24 And steps S25 This also corresponds to transmission type determination means.
[0038]
  As a result, when an abnormality in AT or CVT communication is determined in step S24 or step S25, for example, by flashing a lamp provided in the automobile to notify the abnormality in AT or CVT communication, the vehicle The driver can be alerted of a transmission abnormality in the transmission.
[0039]
  In the vehicle transmission determining apparatus of the present embodiment having such a configuration, the longitudinal acceleration detection unit detects the longitudinal acceleration Ge of the vehicle estimated by the longitudinal acceleration estimation unit (step S5 in FIG. 1). When the longitudinal acceleration G of the automobile is large, an acceleration different from MT is generated by the action of the torque converter, so in this case, it is determined that the transmission is equipped with a torque converter (step S6 in FIG. 1).
[0040]
  Therefore, according to the vehicle transmission determining apparatus of the present embodiment, when the vehicle transmission is an automatic transmission (AT or CVT), even if the connection of the controller is disconnected, it is determined that the vehicle transmission is AT or CVT. Therefore, it is possible to prevent erroneous determination of MT. As a result, accurate transmission type information can be transmitted to a system such as ABS, and therefore the system such as ABS can be switched to appropriate parameters and control contents, and appropriate control according to the transmission type is performed. be able to.
[0041]
  Moreover, in the vehicle transmission determination device of the present embodiment, when the deviation between the engine speed Ne and the drive wheel speed (left-right average) Nd is larger than a predetermined value (estimated drive wheel speed Nde) (torque When the converter slips, it is determined that the transmission has a torque converter (step S9 in FIG. 1). Thereby, in addition to the above-mentioned effect, it can be judged more reliably whether it is a transmission with a torque converter.
[0042]
  Further, in this embodiment, in step S11 in FIG. 1, the amount of change per unit time of the ratio between the engine speed Ne and the drive wheel speed Nd is calculated, and the amount of change is smaller than a predetermined value set in advance. If it is determined that the change in the engine speed Ne is determined to be continuous, otherwise, it is determined that the change in the engine speed Ne is not continuous.
[0043]
  By the way, in the case of an AT vehicle or MT vehicle, as the vehicle speed increases, the gear ratio changes discontinuously, so that the engine speed changes in a saw blade shape, whereas in the case of a CVT vehicle, the engine speed changes. The number changes continuously, and the relationship between the drive wheel rotation speed (drive wheel speed) Nd and the output rotation speed of the transmission also becomes continuous. From this, as described above, it is possible to reliably determine whether or not the vehicle is a CVT vehicle by determining whether or not the change in the engine speed Ne is continuous in step S11.
[0044]
  Further, in step S7 in FIG. 1, it is determined that the transmission is a manual transmission when an input signal due to the clutch connecting / disconnecting operation is detected. Thereby, in the MT vehicle, since it is necessary to always perform the clutch connection / disconnection operation, it is possible to reliably identify the manual transmission by detecting the input signal by the clutch connection / disconnection operation.
[0045]
  Further, in the vehicle transmission determination device of the present embodiment, the processing of the flowchart shown in FIG. 1 is performed by performing the processing of the flowchart shown in FIG. 2, and as a result, the automotive transmission is an automatic transmission. If the communication data from the transmission is not input even if it is determined, it is determined that the communication from the transmission is abnormal (step S21 to step S25 in FIG. 2). As a result, when the vehicle transmission is an automatic transmission (AT or CVT), even if the connection of the controller is disconnected, it is not erroneously determined to be a manual transmission, such as a poor connection of the transmission controller. It is possible to detect the occurrence of a communication abnormality and alert a driver or the like.
[0046]
  As mentioned above, although demonstrated based on the example of illustration, this invention is not restricted to the thing of the said Example. For example, in the above embodiment, AT and CVT are discriminated by the change in the value of the engine speed Ne in step S11 in FIG. 1, but instead, the following processing is performed in step S11. It's also good. That is, when the change amount per unit time of the engine torque Te is greater than or equal to a predetermined value (when the change in the output torque of the internal combustion engine at the time of shifting is large), the process proceeds to step S2 and is determined to be AT. It progresses to step S4 and it is judged that it is CVT. In this way, in the case of an AT vehicle, the cooperative control with the internal combustion engine is performed at the time of shifting, and the reduction control of the output torque of the internal combustion engine is performed. It can be reliably determined that the transmission for transmission is AT.
[0047]
  It should be noted that the vehicle specifications used to determine that the automatic transmission with a torque converter is not limited to the vehicle specifications in the above embodiment, and in the present invention, a power transmission system from the output shaft of the internal combustion engine to the axle. Of course, it is determined by the tire radius.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a processing procedure for discriminating a transmission type in a vehicle transmission determination device which is an embodiment of a vehicle transmission determination device of the present invention.
FIG. 2 is a flowchart showing a processing procedure for determining a transmission communication abnormality in the automotive transmission determining apparatus according to the embodiment.
[Explanation of symbols]
  G Longitudinal acceleration of the detected car
  Ge Estimated car longitudinal acceleration
  Ne engine speed
  Nd Drive wheel speed (left and right average)
  Nde Estimated drive wheel speed
  Nf Final gear ratio (Final drive reduction ratio)
  Nt 1st gear ratio (transmission reduction ratio)
  Te engine torque
  R Tire radius
  W car weight

Claims (7)

In a vehicle transmission determination device for determining the type of transmission of a vehicle that shifts the rotational speed output from the internal combustion engine and transmits it to the axle,
Driving state detecting means for detecting the driving state of the vehicle when the first ignition is ON;
Transmission type determining means for determining the type of the transmission based on the driving state of the vehicle;
A vehicle transmission determination device comprising: The transmission to determine whether the automatic transmission with a torque converter, the vehicle transmission determination apparatus according to claim 1,
The driving state detecting means estimates torque in the vehicle based on output torque from the internal combustion engine, torque detecting means for detecting output torque of the internal combustion engine, longitudinal acceleration detecting means for detecting longitudinal acceleration of the vehicle. And longitudinal acceleration estimation means for performing ,
The transmission type determining means is an automatic transmission with a torque converter when the longitudinal acceleration of the vehicle detected by the longitudinal acceleration detecting means is larger than the longitudinal acceleration of the vehicle estimated by the longitudinal acceleration estimating means. It is judged that it is. The vehicle transmission judgment apparatus characterized by the above-mentioned. The transmission to determine whether the automatic transmission with a torque converter, the vehicle transmission determination apparatus according to claim 1,
The drive state detection means includes input-side rotation speed detection means for detecting the rotation speed on the input side of the transmission, and output-side rotation speed detection means for detecting the rotation speed on the output side of the transmission,
The transmission type determining means determines that the transmission is an automatic transmission with a torque converter when the deviation between the input side rotational speed and the output side rotational speed is greater than a predetermined value. Vehicle transmission determination device. The transmission to determine whether the automatic transmission of the stepped, in vehicle transmission determination apparatus according to claim 1,
The drive state detection means includes torque detection means for detecting an output torque of the internal combustion engine,
The transmission type determining means determines that the output type torque of the internal combustion engine is a stepped automatic transmission when a change amount per unit time of the internal combustion engine is a predetermined value or more. Judgment device. The transmission to determine whether the automatic transmission stepless, the vehicular transmission determination apparatus according to claim 1,
The drive state detection means includes input-side rotation speed detection means for detecting the rotation speed on the input side of the transmission, and output-side rotation speed detection means for detecting the rotation speed on the output side of the transmission,
The transmission type determination means is a continuously variable automatic transmission when a change amount per unit time of a ratio or deviation between the input side rotational speed and the output side rotational speed is smaller than a predetermined value. It is determined that the vehicle transmission is determined. In the vehicle transmission determination device according to any one of claims 1 to 5 ,
The transmission type determining means is such that when the transmission is an automatic transmission and includes data output means for outputting data, the vehicle transmission determining device is an automatic transmission first. Even if it is determined, if there is no input of the data from the transmission, it is determined that the communication from the transmission is abnormal. The vehicle transmission determination device according to claim 1, wherein it is determined whether or not the transmission is a manual transmission.
The drive state detection means includes connection / disconnection detection means for detecting the connection / disconnection of a clutch inserted between the internal combustion engine and the axle and capable of connecting / disconnecting the output of the internal combustion engine,
Even if the transmission type determining means determines that the vehicular transmission determining device is an automatic transmission first, if the disconnection detecting means detects the engagement / disengagement of the clutch, the manual transmission It is judged that it is. The vehicle transmission judgment apparatus characterized by the above-mentioned.

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