JPH08268102A - Controller for four-wheel drive vehicle - Google Patents
Controller for four-wheel drive vehicleInfo
- Publication number
- JPH08268102A JPH08268102A JP9770295A JP9770295A JPH08268102A JP H08268102 A JPH08268102 A JP H08268102A JP 9770295 A JP9770295 A JP 9770295A JP 9770295 A JP9770295 A JP 9770295A JP H08268102 A JPH08268102 A JP H08268102A
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- traveling
- road
- data
- sound
- 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.)
- Pending
Links
Landscapes
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、４輪駆動車において走
行する路面状態に応じて前輪と後輪のトルク配分を自動
制御することのできる、４輪駆動の制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-wheel drive control device capable of automatically controlling torque distribution between front wheels and rear wheels in accordance with a road surface condition of a four-wheel drive vehicle.
【０００２】[0002]
【従来の技術】自動車の前後輪のすべてを駆動する４輪
駆動車は、悪路走破性や登坂力にすぐれているが、平坦
な乾燥路面を走行する場合等において前後輪のすべてを
駆動することはエネルギー的に無駄が多いため、いわゆ
るパートタイム４輪駆動方式が提案され実用化されてい
る。この方式によれば、走行する路面状態に応じて、前
輪と後輪のいずれか一方を駆動輪とする２輪駆動と、前
後輪を駆動輪とする４輪駆動のいずれかを選択するよう
に切り換えられる。2. Description of the Related Art A four-wheel drive vehicle that drives all the front and rear wheels of an automobile is excellent in running performance on rough roads and climbing power, but drives all the front and rear wheels when traveling on a flat and dry road surface. Since there is a lot of energy waste, a so-called part-time four-wheel drive system has been proposed and put to practical use. According to this method, either two-wheel drive in which one of the front wheels and rear wheels is the driving wheel and four-wheel drive in which the front and rear wheels are the driving wheels are selected according to the road surface condition on which the vehicle is traveling. Can be switched.
【０００３】また、常に前後輪すべてを駆動するフルタ
イム４輪駆動方式においても、路面状態に応じて前後輪
のトルク配分を制御するために各種の方式が提案されて
いる。たとえば、前後輪に対して常時一定の比率でトル
ク配分する差動装置（センタデフ）を備えると共に、加
速時や悪路走行時のように大きな駆動力を必要とする場
合に前後輪間の動力伝達を差動装置を介すことなく直結
させるための差動制限装置（デフロック）を設けたもの
がある。また、前後輪間の差動回転数に応じて差動を制
限するカップリングを配置したものや、運転操作による
駆動力の大小に応答して差動を制限するトルセンデフを
配置したもの等が知られている。Also in the full-time four-wheel drive system in which all the front and rear wheels are always driven, various systems have been proposed for controlling the torque distribution of the front and rear wheels in accordance with the road surface condition. For example, it is equipped with a differential device (center differential) that constantly distributes torque to the front and rear wheels at a constant ratio, and power transmission between the front and rear wheels is required when a large driving force is required, such as during acceleration or traveling on rough roads There is provided a differential limiting device (differential lock) for directly connecting the above without a differential device. Also known are those that have a coupling that limits the differential according to the differential rotation speed between the front and rear wheels, and that that has a Torsen differential that limits the differential in response to the magnitude of the driving force due to driving operation. Has been.
【０００４】[0004]
【発明が解決しようとする課題】従来の４輪駆動制御方
式は、走行する路面状態に応じた適切なトルク配分を前
後輪に与えるべく自動制御することが困難であった。In the conventional four-wheel drive control system, it is difficult to automatically control the front and rear wheels so that an appropriate torque distribution according to the traveling road surface condition is provided.
【０００５】パートタイム４輪駆動方式における２輪駆
動／４輪駆動の切り換え制御は、一般に運転者みずから
が路面状態を判断して手動でシフトレバーやスイッチを
操作することによって行われている。The switching control between two-wheel drive and four-wheel drive in the part-time four-wheel drive system is generally performed by the driver himself / herself by judging the road surface condition and manually operating a shift lever or a switch.
【０００６】フルタイム４輪駆動方式においてデフロッ
クを設けたものは、４輪駆動走行時における前後輪トル
ク配分比率は一定であり、トルク配分を路面状態に応じ
て様々に変化させることができない。カップリングを用
いたものは前後輪間の差動回転数に応答して自動制御す
るものであるため、車両の挙動に対して制御が遅れがち
となる欠点を有している。トルセンデフを用いたものは
運転操作（アクセル操作）に応答した迅速な自動制御が
可能である反面、運転技術の熟練を要するため、商用自
動車に採用することは困難である。In the full-time four-wheel drive system provided with the diff lock, the front and rear wheel torque distribution ratio during four-wheel drive traveling is constant, and the torque distribution cannot be variously changed according to the road surface condition. Since the one using the coupling is automatically controlled in response to the differential rotation speed between the front and rear wheels, it has a drawback that the control tends to be delayed with respect to the behavior of the vehicle. The one using Torsen Def is capable of quick automatic control in response to a driving operation (accelerator operation), but requires skill in driving technology, and is therefore difficult to be adopted in a commercial vehicle.
【０００７】[0007]
【課題を解決するための手段】そこで本発明は上記した
従来技術の問題点を解消し、路面状態に応じて常に適切
な前後輪トルク配分を実現することのできる自動制御装
置を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, the present invention solves the above-mentioned problems of the prior art and provides an automatic control device which can always realize appropriate front and rear wheel torque distribution in accordance with the road surface condition. To aim.
【０００８】この目的を達成するため、本発明による４
輪駆動の制御装置は、車両走行に伴う走行音を集音する
走行音集音手段と、走行音を路面状態と対応付けたデー
タを記憶する記憶手段と、走行音集音手段で集音した走
行音を記憶手段に記憶されたデータと参照して走行路の
路面状態を判定する路面状態判定手段と、路面状態判定
手段からの出力信号を受けて前後輪に対するトルク配分
比率を決定するトルク配分制御手段と、を備えることを
特徴とする。To this end, according to the invention 4
The wheel drive control device collects traveling sound collecting means for collecting traveling sound accompanying traveling of the vehicle, storage means for storing data in which traveling sound is associated with road surface condition, and traveling sound collecting means. A road surface condition determining means for determining a road surface condition of a traveling road by referring to a running sound with data stored in a storage means, and a torque distribution for determining a torque distribution ratio for front and rear wheels by receiving an output signal from the road surface condition determining means. And a control means.
【０００９】なお、本明細書において、前後輪のトルク
配分の制御とは、前後輪のいずれか一方のみを駆動する
（すなわち該一方に対するトルク配分を１００％、他方
に対するトルク配分を０％とする）ことにより２輪駆動
／４輪駆動の切り換え制御を行うことをも含むものであ
る。すなわち、本発明の４輪駆動の制御装置は、パート
タイム方式において２輪駆動／４輪駆動の切り換え制御
を行うための装置として、あるいは、フルタイム４輪駆
動方式において前後輪に対するトルク配分比率を制御す
るための装置として、適用可能である。In the present specification, the control of the torque distribution between the front and rear wheels means that only one of the front and rear wheels is driven (that is, the torque distribution for the one is 100% and the torque distribution for the other is 0%). ), Thereby performing switching control between two-wheel drive / four-wheel drive. That is, the four-wheel drive control device of the present invention is a device for performing switching control of two-wheel drive / four-wheel drive in the part-time system, or a torque distribution ratio for front and rear wheels in the full-time four-wheel drive system. It is applicable as a device for controlling.
【００１０】[0010]
【作用】車両走行音は舗装路／非舗装路、ドライ／ウエ
ット等の各種路面状態ごとに異なるため、これらを関連
付けたデータをあらかじめ作成して記憶手段に記憶して
おく。実走行に伴う走行音を集音し、この走行音を記憶
手段に記憶されたデータと参照して路面状態を判定し、
その判定結果に基づいた適切な前後輪トルク配分比率が
決定される。Since the vehicle running sound varies depending on various road surface states such as paved road / non-paved road, dry / wet, etc., data relating these is created in advance and stored in the storage means. The traveling sound accompanying the actual traveling is collected, the road surface condition is determined by referring to the traveling sound with the data stored in the storage means,
An appropriate front / rear wheel torque distribution ratio is determined based on the determination result.
【００１１】[0011]
【実施例】本発明の一実施例による４輪駆動の制御装置
の構成が図１に示される。FIG. 1 shows the configuration of a four-wheel drive control system according to one embodiment of the present invention.
【００１２】走行音集音マイク１は、走行音を効率的に
集音可能な車両の適所に装着される。具体的には、バン
パーの両脇下部や、ホイールハウス内に設置することが
できる。走行音集音マイク１をホイールハウス内に設置
する場合には、走行音集音マイク１に泥が付着して集音
効率が低下することを防止するために、泥よけガードを
設け、あるいはさらに、セルフクリーニングシステムを
併設して定期的に走行音集音マイク１の表面に付着した
ゴミを除去するように構成することが好ましい。また、
走行音以外の雑音（たとえばクラクション音）を除外す
るために共鳴箱に収容した走行音集音マイク１をフロン
トパネルの内側に設置してもよい。The traveling sound collecting microphone 1 is mounted in a proper place of a vehicle capable of efficiently collecting traveling sound. Specifically, it can be installed under both sides of the bumper or in the wheel house. When the traveling sound collecting microphone 1 is installed in the wheel house, a mud guard is provided in order to prevent the traveling sound collecting microphone 1 from adhering to the mud and lowering the sound collecting efficiency. Further, it is preferable that a self-cleaning system is additionally provided to periodically remove dust adhering to the surface of the traveling sound collecting microphone 1. Also,
The running sound collecting microphone 1 housed in the resonance box may be installed inside the front panel in order to exclude noise other than running sound (for example, horn sound).
【００１３】走行音集音マイク１で集音された音には雑
音が混入している可能性があるため、ノイズカットフィ
ルタ２に通して、走行音には含まれない高周波数および
低周波数をカットする。Since there is a possibility that noise is mixed in the sound collected by the running sound collecting microphone 1, it is passed through the noise cut filter 2 to remove high and low frequencies not included in the running sound. To cut.
【００１４】ノイズカットされた後の走行音信号は、路
面状態判定部３に入力され、データ記憶部４に記憶され
ている走行音と路面状態との相関データに基づいて、現
在走行中の路面状態が判定される。この相関データは、
ドライおよびウエットのコンンクリート舗装路、土面、
砂利道、泥道、雪道、凍結路等各種の路面状態において
走行した際の実際の走行音を収録し、路面状態ごとに特
有の周波数−音量カーブを作成したものである。The noise-cut running sound signal is input to the road surface condition determining unit 3 and based on the correlation data between the running sound and the road surface condition stored in the data storage unit 4, the road surface currently running. The state is determined. This correlation data is
Dry and wet concrete pavement, soil surface,
The actual running sound when traveling on various road surface conditions such as gravel road, muddy road, snow road, and frozen road was recorded, and a frequency-volume curve peculiar to each road surface condition was created.
【００１５】さらに、図示実施例においては、路面状態
の判定をより正確に行うための補完データとして、車速
データ、道路情報、路面温度データおよび降雨音データ
が参照されるように構成されており、これらのデータ
が、走行音データとともに、データ記憶部４に記憶され
ている。Further, in the illustrated embodiment, the vehicle speed data, road information, road surface temperature data and rainfall sound data are referred to as complementary data for more accurately determining the road surface condition, These data are stored in the data storage unit 4 together with the traveling sound data.
【００１６】これら補完データについて概略的に説明す
ると、走行音周波数ｆは車速Ｖとの間に、ｆ＝ＲＶ（Ｒ
はタイヤ固有の定数）の関係式が成立し、車速が上がる
につれて走行音周波数も高くなる。そこで、データ記憶
部４に記憶された周波数データがたとえば６０ｋｍ／ｈ
ｒで走行した際のデータである場合には、前記関係式に
基づいて、現在の車速（車速センサ５による実測値）に
おける走行音周波数を６０ｋｍ／ｈｒ走行時の周波数に
補正した上で、周波数データを参照する。Explaining these supplementary data schematically, the running sound frequency f and the vehicle speed V are f = RV (R
Is a constant peculiar to the tire), and the traveling sound frequency increases as the vehicle speed increases. Therefore, the frequency data stored in the data storage unit 4 is, for example, 60 km / h.
In the case of data when traveling at r, the traveling sound frequency at the current vehicle speed (measured value by the vehicle speed sensor 5) is corrected to the frequency at the time of traveling at 60 km / hr based on the relational expression, and then the frequency is calculated. Refer to the data.
【００１７】ナビゲーション装置６は、現在位置検出部
と、地図情報記憶部とを備えている。現在位置検出部
は、人工衛星を利用して車両の位置を特定するＧＰＳ
（GlobalPositioning System）受信機と、地磁気を検出
して車両の包囲を求める地磁気センサと、距離センサ
と、ステアリングの回転角度を検出するステアリングセ
ンサとを有しており、これら各センサの出力に基づい
て、車両が現在走行または停止している道路上の現在位
置を検出する。The navigation device 6 includes a current position detecting section and a map information storage section. The current position detection unit uses a GPS to identify the position of the vehicle using an artificial satellite.
It has a (GlobalPositioning System) receiver, a geomagnetic sensor that detects the geomagnetism to determine the surrounding of the vehicle, a distance sensor, and a steering sensor that detects the rotation angle of the steering, and based on the output of each of these sensors. , Detect the current position on the road where the vehicle is currently running or stopped.
【００１８】ナビゲーション装置６の地図情報記憶部
は、本発明による４輪駆動制御に必要な道路情報を提供
する。すなわち、本発明による４輪駆動の制御装置をナ
ビゲーション装置６と連動させることにより、現在走行
中の路面についての舗装／非舗装情報、勾配情報等の大
まかな路面情報を、走行音の分析以前に得ることができ
る。たとえば、ナビゲーション装置６から提供された道
路情報によって、無雪地帯または無雪時期（カレンダー
情報を併用する）において平坦な高速道路を走行中であ
ることが知られた場合、晴天時であれば、当該路面はド
ライ状態の舗装路であると推定することができる。The map information storage unit of the navigation device 6 provides road information necessary for four-wheel drive control according to the present invention. That is, by interlocking the four-wheel drive control device according to the present invention with the navigation device 6, rough road surface information such as pavement / non-pavement information and slope information about the currently traveling road surface can be obtained before the analysis of the running sound. Obtainable. For example, when it is known from the road information provided from the navigation device 6 that the vehicle is traveling on a flat highway in a snow-free zone or a snow-free period (also using calendar information), if it is fine weather, It can be estimated that the road surface is a dry paved road.
【００１９】ナビゲーション装置６からの道路情報（積
雪地帯であるか否か）と併せて、路面温度センサ７で路
面温度を検出することにより、現在走行中の路面の積雪
状態、凍結状態等を推測することができる。路面温度セ
ンサ７には、放射温度計や集電型温度計等の非接触型の
温度計が好適に用いられ、道路前方の路面から放射され
る赤外線のエネルギーを測定することにより路面温度を
検出する。The road surface temperature sensor 7 detects the road surface temperature together with the road information (whether or not it is a snowy area) from the navigation device 6 to infer the snow covered state, the frozen state, etc. of the road surface currently running. can do. A non-contact type thermometer such as a radiation thermometer or a current collecting type thermometer is preferably used as the road surface temperature sensor 7, and the road surface temperature is detected by measuring the energy of infrared rays radiated from the road surface in front of the road. To do.
【００２０】降雨音データは、各種の雨量（たとえば大
雨、普通程度の中雨、小雨）において走行した際の実際
の走行音を収録し、その結果に基づいて雨量ごとに特有
の周波数−音量カーブとして作成されるものである。降
雨の有無および雨量は走行音にも影響を与えるので、走
行音集音マイク１で集音した走行音を分析して判定する
ことも可能であるが、別途降雨音集音マイク８をたとえ
ばフロントガラス両脇等に設置して降雨音を集音するこ
とにより、走行音集音マイク１で集音した走行音に基づ
く検索対象を、降雨音集音マイク８による集音結果（降
雨の有無および雨量）に該当する周波数−音量カーブに
絞ることができるため、検索精度および検索スピードの
向上が図られる。The rainfall sound data includes actual traveling sounds when the vehicle travels in various rainfall amounts (for example, heavy rain, moderate rain, light rain), and based on the results, a frequency-volume curve peculiar to each rainfall amount. Is created as. Since the presence or absence of rainfall and the amount of rainfall also affect the running sound, it is possible to analyze and determine the running sound collected by the running sound collecting microphone 1, but the rain sound collecting microphone 8 is separately provided on the front, for example. By installing the rain sounds on both sides of the glass and collecting rain sounds, the search target based on the running sounds collected by the running sound collecting microphones 1 is used as a search target by the rain sound collecting microphones 8 (presence or absence of rain and Since the frequency-volume curve corresponding to (rainfall) can be narrowed down, the search accuracy and the search speed can be improved.
【００２１】路面状態判定部３は、これら補完データを
参照した上で、走行音集音マイク１により集音された走
行音の実測データに基づいて、記憶部４に記憶されてい
る各種の周波数−音量カーブの中から最も近似するもの
を検索し、現在走行中の路面状態を判定する。The road surface condition determining section 3 refers to these complementary data and then, based on the actual measurement data of the traveling sound collected by the traveling sound collecting microphone 1, various frequencies stored in the storage section 4. -Search for the most approximate one from the volume curves and determine the road surface condition currently running.
【００２２】路面状態判定部３による判定結果を示す信
号を受けたトルク配分制御装置９は、判定された路面状
態に適した前後輪トルク配分を演算し、油圧制御装置１
０にその指令信号を送信する。The torque distribution control device 9 which has received the signal indicating the judgment result by the road surface condition judging section 3 calculates the front and rear wheel torque distribution suitable for the judged road surface condition, and the hydraulic control device 1
The command signal is transmitted to 0.
【００２３】油圧制御装置１０は、受信した指令信号に
基づいて、油圧多板クラッチ１１の開度を制御する。た
とえば、フルタイム４輪駆動方式において、乾燥した舗
装路を直進走行している場合には前後輪のトルク配分を
５０：５０とし、路面との摩擦係数が低下する雪道や凍
結路、あるいは轍ができるほどの雨道等では後輪へのト
ルク配分を増大して４０：６０とするように、油圧多板
クラッチ１１を制御する。パートタイム方式の場合に
は、乾燥舗装路の直進走行時には前輪または後輪のいず
れか一方の２輪駆動とし、雪道等走行時には４輪駆動に
切り換えるように制御する。The hydraulic control device 10 controls the opening degree of the hydraulic multi-plate clutch 11 based on the received command signal. For example, in the full-time four-wheel drive system, when driving straight on a dry paved road, the front and rear wheels have a torque distribution of 50:50, and the coefficient of friction with the road surface is reduced to a snowy road, a frozen road, or a rut. The hydraulic multi-plate clutch 11 is controlled so that the torque distribution to the rear wheels is increased to 40:60 on a rainy road or the like to the extent that it is possible to perform. In the case of the part-time system, either the front wheels or the rear wheels are used for two-wheel drive when traveling straight on a dry pavement, and the four-wheel drive is controlled when traveling on a snowy road.
【００２４】路面状態判定部３での判定結果を示す信号
は、以上に述べた４輪駆動の制御に用いられるだけでな
く、他の制御のための指令信号に併用することが可能で
ある。たとえば図示実施例においては、路面状態判定結
果信号が、ワイパー作動制御装置１２および車速アラー
ム表示手段１３にも送信される。The signal indicating the judgment result of the road surface condition judging section 3 can be used not only for the above-mentioned control of four-wheel drive but also for a command signal for other control. For example, in the illustrated embodiment, the road surface condition determination result signal is also transmitted to the wiper actuation control device 12 and the vehicle speed alarm display means 13.
【００２５】すなわち、走行音集音マイク１あるいは降
雨音集音マイク８により降雨が感知された場合には瞬時
にワイパーを始動させ、かつ、その雨量に応答してワイ
パーの作動速度を変化させるように、ワイパーを自動制
御することができる。That is, when rain is detected by the traveling sound collecting microphone 1 or the rainfall sound collecting microphone 8, the wiper is instantly started and the operating speed of the wiper is changed in response to the amount of rain. Moreover, the wiper can be automatically controlled.
【００２６】また、スピードオーバーに起因するスタン
ディングウエーブ現象、あるいは水の溜まった路面での
スピードオーバーに起因するハイドロプレーン現象の発
生を、走行音集音マイク１で集音した走行音中に含まれ
る異常周波数と車速センサ５で測定した車速の両方から
検知し、車速アラーム表示手段１３に「ＡＬＡＲＭ」ま
たは「スピード落とせ」のように表示して運転者に警告
することができる。Further, the occurrence of a standing wave phenomenon due to overspeed or a hydroplane phenomenon due to overspeed on a road surface where water is collected is included in the traveling sound collected by the traveling sound collecting microphone 1. The driver can be warned by detecting from both the abnormal frequency and the vehicle speed measured by the vehicle speed sensor 5 and displaying it on the vehicle speed alarm display means 13 as "ALARM" or "speed down".
【００２７】さらに、図１に併せて示されるように、走
行音集音マイク１とは別にタイヤ騒音集音マイク１４を
設置するとともに、新品のタイヤを装着した状態で各種
の路面状態において実走行してタイヤ騒音を収録し、路
面状態ごとに特有のタイヤ騒音周波数−音量カーブをデ
ータベースとして記憶部４に記憶させておく。Further, as also shown in FIG. 1, a tire noise collecting microphone 14 is installed separately from the traveling sound collecting microphone 1, and the vehicle actually travels under various road surface conditions with new tires mounted. Then, the tire noise is recorded, and the tire noise frequency-volume curve peculiar to each road surface state is stored in the storage unit 4 as a database.
【００２８】一方、タイヤ騒音はタイヤの構造およびト
レッドパターンに影響される。たとえば、タイヤ構造で
はラジアル、トレッドパターンではリブが騒音レベルが
低く、逆に、タイヤ構造ではバイヤス、トレッドパター
ンではラグが騒音レベルが高い。そこで、臨時にタイヤ
を交換して走行する場合には、装着しているタイヤの種
類をナビゲーション装置の操作パネル等において入力す
ることで、上記のタイヤ騒音周波数−音量カーブを補正
して適用する。On the other hand, tire noise is affected by the tire structure and tread pattern. For example, the tire structure has a low noise level in the radial, and the rib in the tread pattern has a low noise level, and conversely, the tire structure has a high noise level in the tire and the lug in the tread pattern. Therefore, when the tire is temporarily replaced and the vehicle travels, the tire noise frequency-volume curve is corrected and applied by inputting the type of the tire mounted on the operation panel or the like of the navigation device.
【００２９】前述の要領により路面状態判定部３におい
て路面状態を判定した後、タイヤ騒音集音マイク１４で
集音された実際のタイヤ騒音を、記憶部４に記憶されて
いるタイヤ騒音周波数−音量データのうちの当該判定さ
れた路面状態におけるデータと比較する。タイヤ騒音の
周波数はタイヤの空気圧によって変化するため、実測デ
ータによるタイヤ騒音周波数が記憶データのものよりも
一定レベル以上離れている（低下している）ことが検知
された場合には、空気圧アラーム表示手段１５に「ＡＬ
ＡＲＭ」あるいは「タイヤ空気圧チェック」のような警
告を表示すべく指令信号を発する。After the road surface condition determination unit 3 determines the road surface condition according to the above-described procedure, the actual tire noise collected by the tire noise collecting microphone 14 is stored in the storage unit 4 as the tire noise frequency-volume. The data is compared with the data of the determined road surface condition. The tire noise frequency changes depending on the tire pressure, so if the measured tire noise frequency is more than a certain level (lower) than the stored data, the air pressure alarm is displayed. The means 15 is "AL
A command signal is issued to display a warning such as "ARM" or "tire pressure check".
【００３０】[0030]
【発明の効果】本発明によれば、４輪駆動における前後
輪のトルク配分比率が、車両走行音に基づいて判定され
る路面状態に基づいて、自動的、迅速かつ高精度に制御
される。このため、特に悪条件下での走行の安全性が向
上し、リアルタイムで適切に制御されたトルク配分比率
の下での安全走行が保証される。According to the present invention, the torque distribution ratio of the front and rear wheels in four-wheel drive is automatically, quickly and highly accurately controlled based on the road surface condition determined based on the vehicle running noise. Therefore, driving safety is improved especially under adverse conditions, and safe driving is ensured under a properly controlled torque distribution ratio in real time.
【００３１】さらに、本発明による制御装置は、運転操
作の熟練を要することなく、現在走行中の路面状態にお
いて最も適切なトルク配分比率を与えることができるの
で、一般車両における４輪駆動制御装置として採用する
のに好適である。Further, since the control device according to the present invention can give the most appropriate torque distribution ratio to the road surface condition which is currently running, without requiring skill of driving operation, it is a four-wheel drive control device for a general vehicle. It is suitable for adoption.
【００３２】本発明の制御装置は、車両走行音のほかに
任意の補完データを参照することにより、さらに路面状
態を高精度に検索することが可能となる。The control device of the present invention can retrieve the road surface condition with high accuracy by referring to any supplementary data in addition to the vehicle running sound.
【図１】本発明による４輪駆動制御装置の構成例を示す
図である。FIG. 1 is a diagram showing a configuration example of a four-wheel drive control device according to the present invention.
１ 走行音集音マイク ２ ノイズカットフィルタ ３ 路面状態判定部 ４ データ記憶部 ９ トルク配分制御装置 １０ 油圧制御装置 １１ 油圧多板クラッチ DESCRIPTION OF SYMBOLS 1 Running sound collecting microphone 2 Noise cut filter 3 Road surface condition determination unit 4 Data storage unit 9 Torque distribution control device 10 Hydraulic control device 11 Hydraulic multi-plate clutch
Claims (6)
音集音手段と、走行音を路面状態と対応付けたデータを
記憶する記憶手段と、前記走行音集音手段で集音した走
行音を前記記憶手段に記憶されたデータと参照して走行
路の路面状態を判定する路面状態判定手段と、前記路面
状態判定手段からの出力信号を受けて前後輪に対するト
ルク配分比率を決定するトルク配分制御手段と、を備え
ることを特徴とする４輪駆動の制御装置。1. A traveling sound collecting unit that collects traveling sound accompanying traveling of a vehicle, a storage unit that stores data in which the traveling sound is associated with a road surface state, and a traveling that is collected by the traveling sound collecting unit. A road surface condition determining means for determining a road surface condition of a traveling road by referring to a sound stored in the storage means, and a torque for determining a torque distribution ratio for front and rear wheels by receiving an output signal from the road surface condition determining means. A four-wheel drive control device comprising: a distribution control means.
ンサ手段が設けられ、前記路面状態判定手段は、前記車
速センサ手段からの車速データを参照して走行路の路面
状態を判定することを特徴とする請求項１記載の４輪駆
動の制御装置。2. A vehicle speed sensor means for detecting the traveling speed of the vehicle is further provided, and the road surface condition judging means judges the road surface condition of the traveling road by referring to the vehicle speed data from the vehicle speed sensor means. The four-wheel drive control device according to claim 1.
前記路面状態判定手段は、前記道路情報提供手段からの
道路情報データを参照して走行路の路面状態を判定する
ことを特徴とする請求項１または２のいずれかに記載の
４輪駆動の制御装置。3. A road information providing means is further provided,
The four-wheel drive control according to claim 1 or 2, wherein the road surface state determination unit determines a road surface state of a traveling road by referring to road information data from the road information providing unit. apparatus.
面温度センサ手段が設けられ、前記路面状態判定手段
は、前記路面温度センサ手段からの路面温度データを参
照して走行路の路面状態を判定することを特徴とする請
求項１ないし３のいずれかに記載の４輪駆動の制御装
置。4. A road surface temperature sensor means for detecting the road surface temperature of the traveling road is further provided, and the road surface condition judging means judges the road surface condition of the traveling road by referring to the road surface temperature data from the road surface temperature sensor means. The four-wheel drive control device according to any one of claims 1 to 3, wherein:
段が設けられ、前記路面状態判定手段は、前記降雨音集
音手段からの降雨音データを参照して走行路の路面状態
を判定することを特徴とする請求項１ないし４のいずれ
かに記載の４輪駆動の制御装置。5. A rain sound collecting means for collecting rain sound is further provided, and the road surface condition judging means judges the road surface condition of the traveling road by referring to the rain sound data from the rain sound collecting means. The four-wheel drive control device according to any one of claims 1 to 4, wherein:
タイヤ騒音集音手段が設けられ、前記路面状態判定手段
は、前記タイヤ騒音集音手段からのタイヤ騒音データを
参照して前記記憶手段に記憶された前記データを補正し
た上で走行路の路面状態を判定することを特徴とする請
求項１ないし４のいずれかに記載の４輪駆動の制御装
置。6. A tire noise collecting means for collecting tire noise during traveling is provided, and the road surface condition determining means refers to tire noise data from the tire noise collecting means and stores it in the storage means. 5. The four-wheel drive control device according to claim 1, wherein the road surface condition of the traveling road is determined after correcting the stored data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9770295A JPH08268102A (en) | 1995-03-31 | 1995-03-31 | Controller for four-wheel drive vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9770295A JPH08268102A (en) | 1995-03-31 | 1995-03-31 | Controller for four-wheel drive vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08268102A true JPH08268102A (en) | 1996-10-15 |
Family
ID=14199264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9770295A Pending JPH08268102A (en) | 1995-03-31 | 1995-03-31 | Controller for four-wheel drive vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08268102A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6609066B2 (en) | 2002-01-24 | 2003-08-19 | Ford Global Technologies, Llc | Method and apparatus for activating a crash countermeasure in response to the braking capability of a vehicle |
| JP2007099126A (en) * | 2005-10-05 | 2007-04-19 | Denso Corp | Vehicle control device |
| JP2009067382A (en) * | 2004-03-10 | 2009-04-02 | Fujitsu Ten Ltd | Own vehicle presence informing device |
| KR101416351B1 (en) * | 2008-11-11 | 2014-07-09 | 현대자동차 주식회사 | 4wd control system for sensing weather change |
| US9623748B2 (en) | 2012-10-24 | 2017-04-18 | Audi Ag | Method and system for operating a drive train of a motor vehicle |
| CN110466349A (en) * | 2019-08-08 | 2019-11-19 | 山东五征集团有限公司 | Time sharing commercial vehicle transfer case with differential limitation |
| JP2020082896A (en) * | 2018-11-20 | 2020-06-04 | 本田技研工業株式会社 | Vehicle control system |
-
1995
- 1995-03-31 JP JP9770295A patent/JPH08268102A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6609066B2 (en) | 2002-01-24 | 2003-08-19 | Ford Global Technologies, Llc | Method and apparatus for activating a crash countermeasure in response to the braking capability of a vehicle |
| JP2009067382A (en) * | 2004-03-10 | 2009-04-02 | Fujitsu Ten Ltd | Own vehicle presence informing device |
| JP2007099126A (en) * | 2005-10-05 | 2007-04-19 | Denso Corp | Vehicle control device |
| KR101416351B1 (en) * | 2008-11-11 | 2014-07-09 | 현대자동차 주식회사 | 4wd control system for sensing weather change |
| US9623748B2 (en) | 2012-10-24 | 2017-04-18 | Audi Ag | Method and system for operating a drive train of a motor vehicle |
| JP2020082896A (en) * | 2018-11-20 | 2020-06-04 | 本田技研工業株式会社 | Vehicle control system |
| CN110466349A (en) * | 2019-08-08 | 2019-11-19 | 山东五征集团有限公司 | Time sharing commercial vehicle transfer case with differential limitation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9358883B2 (en) | Method for use with vehicle having selectable transfer case | |
| US20070050121A1 (en) | Method for determining a coefficient of friction | |
| EP0890458B1 (en) | Wear condition detecting apparatus for tyre and method thereof | |
| US6166657A (en) | Imminent icing condition enunciator | |
| US20040154715A1 (en) | Method and device for detecting tyre wear or the like | |
| US5852243A (en) | Method and apparatus for detecting a road pavement surface condition | |
| US20150153266A1 (en) | Determining a risk of aquaplaning | |
| US20050172707A1 (en) | Tire-state obtaining apparatus | |
| JP4444505B2 (en) | Method and apparatus for determining the characteristic value of the instantaneous maximum friction coefficient | |
| CN110758025B (en) | Tire pressure regulating method, automobile and computer readable medium | |
| CN111999241A (en) | Road surface friction coefficient prediction system | |
| CN115605648A (en) | Apparatus and system for detecting road surface condition and method for detecting road surface condition by using the same | |
| US6206299B1 (en) | Traction enhancing deployment system | |
| JPH1159355A (en) | Inter-car distance alarm device | |
| JPH08268102A (en) | Controller for four-wheel drive vehicle | |
| CN112078587A (en) | Tire condition determination system | |
| JP5453959B2 (en) | Road information provision system | |
| JP3703062B2 (en) | Road surface condition detection sensor, road surface condition detection device using the same, antifreezing agent spraying vehicle and road patrol car equipped with the sensor | |
| JPH0962980A (en) | On-vehicle communication equipment | |
| US20210269028A1 (en) | Method for sensing and processing the carriageway condition of a carriageway on which a vehicle is driven | |
| JPH0950595A (en) | Speed control system | |
| JPH09288797A (en) | Speed controller for vehicle | |
| EP1644585A1 (en) | System for collecting road status information | |
| JP3440394B2 (en) | Road condition determination system, road management system using the road condition determination system, road condition information collection vehicle, and automatic deicing agent spraying system | |
| KR20210098217A (en) | Detecting vehicle of black ice |