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1. EP2735487 - ROAD SURFACE CONDITION ESTIMATION METHOD, AND ROAD SURFACE CONDITION ESTIMATION DEVICE

官庁 欧州特許庁(EPO)
出願番号 12814951
出願日 18.07.2012
公開番号 2735487
公開日 28.05.2014
公報種別 B1
IPC
B60W 40/068
B処理操作;運輸
60車両一般
W異なる種類または異なる機能の車両用サブユニットの関連制御;ハイブリッド車両に特に適した制御システム;特定の単一のサブユニットの制御に関するものではない、特定の目的のための道路走行用車両の運動制御システム
40特定の単一のサブユニットの制御に関するものではない道路走行用車両の運動制御システムのためのパラメータの推定または演算
02周囲の環境に関するもの
06道路の状態
068道路の摩擦係数(道路とタイヤ間の接触状態)
B60W 40/06
B処理操作;運輸
60車両一般
W異なる種類または異なる機能の車両用サブユニットの関連制御;ハイブリッド車両に特に適した制御システム;特定の単一のサブユニットの制御に関するものではない、特定の目的のための道路走行用車両の運動制御システム
40特定の単一のサブユニットの制御に関するものではない道路走行用車両の運動制御システムのためのパラメータの推定または演算
02周囲の環境に関するもの
06道路の状態
CPC
B60T 8/172
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
8Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
17Using electrical or electronic regulation means to control braking
172Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
B60T 2210/12
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
2210Detection or estimation of road or environment conditions; Detection or estimation of road shapes
10Detection or estimation of road conditions
12Friction
B60W 40/068
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
40Estimation or calculation of ; non-directly measurable; driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, ; e.g. by using mathematical models
02related to ambient conditions
06Road conditions
068Road friction coefficient
B60W 2510/227
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
2510Input parameters relating to a particular sub-units
22Suspension systems
227Oscillation frequency
B60W 2520/28
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
2520Input parameters relating to overall vehicle dynamics
28Wheel speed
B60W 40/06
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
40Estimation or calculation of ; non-directly measurable; driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, ; e.g. by using mathematical models
02related to ambient conditions
06Road conditions
出願人 BRIDGESTONE CORP
発明者 WAKAO YASUMICHI
指定国 (国コード)
優先権情報 2011158854 20.07.2011 JP
2011162676 26.07.2011 JP
2012068154 18.07.2012 JP
発明の名称
(DE) VERFAHREN ZUR BEURTEILUNG DES STRASSENOBERFLÄCHENZUSTANDS UND VORRICHTUNG ZUR BEURTEILUNG DES STRASSENOBERFLÄCHENZUSTANDS
(EN) ROAD SURFACE CONDITION ESTIMATION METHOD, AND ROAD SURFACE CONDITION ESTIMATION DEVICE
(FR) PROCÉDÉ D'ÉVALUATION DE L'ÉTAT DE LA SURFACE DE ROUTE, DISPOSITIF D'ÉVALUATION DE L'ÉTAT DE LA SURFACE DE ROUTE
要約
(EN)
The invention provides a method and apparatus capable of accurately estimating a road surface condition under a traveling vehicle using unsprung acceleration and wheel speed data. The unsprung fore-aft acceleration (Gx) is detected by an acceleration sensor (11) attached to a knuckle (31) which is an unsprung component of a vehicle. At the same time, the wheel speed (Vw) is detected and the variation (”Vw) in wheel speed is calculated. Then the fluctuation range (Ã(”Vw)) of the variation in wheel speed and the fluctuation range (Ã(Gx)) of the unsprung fore-aft acceleration are calculated. And whether the road surface is a rough road surface with some bumpiness or a flat (smooth) road surface is estimated from a relationship between the fluctuation range (Ã(”Vw)) of the variation in wheel speed and the fluctuation range (Ã(Gx)) of the unsprung fore-aft acceleration.

(FR)
Afin de produire un procédé qui peut précisément évaluer l'état d'une route au cours du déplacement à l'aide de données de vitesse de roue et d'accélération descendante de ressort et de produire un dispositif associé, l'accélération avant/arrière descendante de ressort (Gx) est détectée par un capteur d'accélération (11) fixé à une rotule (31) qui est un composant inférieur de ressort de véhicule, et la vitesse de roue (Vw) est également détectée pour calculer l'importance de changement (ΔVw) de la vitesse de roue. Ensuite, la plage de fluctuation (σ(ΔVw)) de la quantité de changement de vitesse de roue et la plage de fluctuation (σ(Gx)) de l'accélération avant/arrière descendante de ressort sont calculées. Une évaluation pour savoir si la surface de route comporte des sections inégales relativement grandes ou pour savoir si la surface de route est lisse est effectuée sur la base de la relation entre la plage de fluctuation (σ(ΔVw)) de l'importance de changement de vitesse de roue et la plage de fluctuation (σ(Gx)) de l'accélération avant/arrière descendante de ressort.

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