To provide a torque distribution control device of a four-wheel drive vehicle that can improve fuel economy of the vehicle and durability of the device in the case that a command value of driving torque distributed to rear wheels of the four-wheel drive vehicle is substantially zero.SOLUTION: When command values (LTq, RTq) of driving torque distributed to one of a left rear wheel and a right rear wheel as sub driving wheels and to the other are smaller than a predetermined lower-limit value (L1=LTq1, RTq1), a torque distribution control device of a four-wheel drive vehicle performs control based upon the command values of driving torque as the predetermined lower-limit value, and calculates a right-left sum torque command value (TM) as the sum of the command values of driving torque distributed to one of the left rear wheel and right rear wheel and to the other. When the right-left sum torque command value is smaller than the predetermined lower-limit value, the torque distribution control device determines the right-left sum torque command value as a command value of driving torque instead of the predetermined lower-limit value.SELECTED DRAWING: Figure 6
【課題】四輪駆動車両の後輪に配分される駆動トルクの指令値が実質的にゼロとなるような場合において、車両の燃費や装置の耐久性を向上させることができる四輪駆動車両のトルク配分制御装置を提供する。【解決手段】副駆動輪である左後輪と右後輪のいずれか一方と他方とに配分する駆動トルクの指令値(LTq,RTq)がそれぞれ所定の下限値(L1=LTq1,RTq1)を下回る場合、当該駆動トルクの指令値を所定の下限値とする制御を行うと共に、左後輪と右後輪のいずれか一方と他方に配分する駆動トルクの指令値の和である左右和トルク指令値(TM)を算出し、当該左右和トルク指令値が所定の下限値未満の場合には、所定の下限値に代えて、左右和トルク指令値を駆動トルクの指令値とする。【選択図】図6
TORQUE DISTRIBUTION CONTROL DEVICE OF FOUR-WHEEL DRIVE VEHICLE
四輪駆動車両のトルク配分制御装置
2018-11-01
Patent
Elektronische Ressource
Japanisch
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 |
TORQUE DISTRIBUTION CONTROL DEVICE OF FOUR-WHEEL DRIVE VEHICLE
Europäisches Patentamt | 2018
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