PROBLEM TO BE SOLVED: To suppress a vehicular vibration, of a four-wheel-drive vehicle, due to fluctuation of drive force distribution without reducing necessary drive force for a stable travel.SOLUTION: A drive force control apparatus 85, for use in a four-wheel-drive vehicle that includes a drive force distribution device 42 capable of changing drive force distribution to primary drive wheels 10R, 10L and secondary drive wheels 11R, 11L in a drive force transmission path to the primary drive wheels 10R, 10L and secondary drive wheels 11R, 11L from drive sources 2, 4, includes: a wheel speed sensor 95; and a differential rotation drive force process part B02 for changing drive force distribution in accordance with a rotation speed difference between the primary drive wheels 10R, 10L and secondary drive wheels 11R, 11L. Further, the differential rotation drive force process part B02 performs: increasing the drive force distribution to the secondary drive wheels 11R, 11L proportionately as the rotation speed difference increases; reducing the drive force distribution to the secondary drive wheels 11R, 11L proportionately as the rotation speed difference decreases; and limiting a changing speed of the drive force distribution when reducing the drive force distribution to the secondary drive wheels 11R, 11L.SELECTED DRAWING: Figure 5
【課題】四輪駆動車において、安定した走行のために必要な駆動力を減少させることなく、駆動力配分の変動に起因する車体振動を抑制する。【解決手段】駆動源2、4から主駆動輪10R、10L及び従駆動輪11R、11Lへの駆動力伝達経路に、主駆動輪10R、10L及び従駆動輪11R、11Lへの駆動力配分を変更し得る駆動力配分装置42を備える四輪駆動車の駆動力制御装置85は、車輪速センサ95と、主駆動輪10R、10Lと従駆動輪11R、11Lとの回転速度差に応じて駆動力配分を変更する差回転駆動力処理部B02と、を備える。そして、差回転駆動力処理部B02は、回転速度差が拡大するほど従駆動輪11R、11Lへの駆動力配分を大きくし、回転速度差が縮小するほど従駆動輪11R、11Lへの駆動力配分を小さくし、従駆動輪11R、11Lへの駆動力配分を小さくする場合には、駆動力配分の変化速度を制限する。【選択図】図5
DRIVE FORCE CONTROL APPARATUS
駆動力制御装置
2016-02-01
Patent
Electronic Resource
Japanese
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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