DRIVE POWER CONTROL METHOD

• Main Authors: YAGI YASUSHI, KOFU DAISUKE, TATARA AKIHIRO, NOBUTANI NAOKI, IMAMURA YASUMASA
• Format: Patent
• Language: English; Japanese
• Published: 10.01.2019
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

To provide a drive power control method by which drive power for a drive wheel is controlled so as to hinder a slip occurrence according to a detected road surface condition.SOLUTION: A drive power control method for a four-wheel drive car, which controls drive power for a drive wheel, comprises: a road-surface condition determination step in which a road-surface condition is detected and road-surface roughness is determined; a load correction step in which, when it is determined in the road-surface condition determination step that the road surface is rough, ground load for the drive wheel is corrected on the bases of a load change rate set in advance according to a road-surface rough condition; an estimation step in which a slip occurrence of the drive wheel is estimated on the basis of the ground load corrected in the load correction step, a road-surface friction coefficient, lateral force acting on the drive wheel, and drive power of the drive wheel; and a drive power control step in which, when a slip occurrence is estimated in the estimation step, drive power for the drive wheel is controlled so as to hinder a slip occurrence.SELECTED DRAWING: Figure 4 【課題】検知した路面状況に応じてスリップ発生を抑制するように駆動輪の駆動力を制御する駆動力制御方法を提供すること。【解決手段】駆動輪の駆動力を制御する四輪駆動車の駆動力制御方法において、路面状況を検知して路面荒れを判定する路面状況判定ステップと、前記路面状況判定ステップで路面が荒れていると判定したときに、路面の荒れた状態に応じて予め設定された荷重変化率に基づいて駆動輪の接地荷重を補正する荷重補正ステップと、前記荷重補正ステップで補正した接地荷重と路面摩擦係数と前記駆動輪に作用する横力と前記駆動輪の駆動力とに基づいて、前記駆動輪のスリップ発生を予測する予測ステップと、前記予測ステップでスリップ発生が予測されたときに、スリップ発生を抑えるように前記駆動輪の駆動力の制御を行う駆動力制御ステップとを有する。【選択図】図４