ROAD SURFACE FRICTION COEFFICIENT ESTIMATION APPARATUS

PROBLEM TO BE SOLVED: To estimate a road surface friction coefficient during a travel regardless of braking.SOLUTION: A load change amount detection part 28A detects a change amount of a load exerted to a wheel of a vehicle 10 in travel. An integral value detection part 28B detects an integral value...

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Bibliographische Detailangaben
Hauptverfasser:	TOYODA HIROMITSU, KODERA HARUHIRO, SHIMOZATO SHUNJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT TRANSPORTING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To estimate a road surface friction coefficient during a travel regardless of braking.SOLUTION: A load change amount detection part 28A detects a change amount of a load exerted to a wheel of a vehicle 10 in travel. An integral value detection part 28B detects an integral value of the change amount of the load exerted to the wheel of the vehicle 10 in travel. A peak value detection part 28C detects a peak value of the integral value detected by the integral value detection part 28B. A first estimation part 28D estimates, as a first road-surface friction coefficient, a road surface friction coefficient of a road surface 2 the vehicle 10 travels on from the peak value detected while the vehicle 10 travels, on the basis of a pre-obtained correlation between a peak value and the road surface friction coefficient of the road surface 2 the vehicle 10 travels on.SELECTED DRAWING: Figure 1 【課題】走行中であれば制動の有無に拘わらず路面摩擦係数の推定を行なう。【解決手段】荷重変化量検出部２８Ａは、走行中の車両１０の車輪に加わる荷重の変化量を検出するものである。微分値検出部２８Ｂは、走行中の車両１０の車輪に加わる荷重の変化量の微分値を検出するものである。ピーク値検出部２８Ｃは、微分値検出部２８Ｂで検出された微分値のピーク値を検出するものである。第１推定部２８Ｄは、予め取得された、ピーク値と車両１０が走行している路面２の路面摩擦係数との相関関係に基いて、車両１０の走行中に検出されたピーク値から車両１０が走行している路面２の路面摩擦係数を第１路面摩擦係数として推定するものである。【選択図】図１