To suppress a deterioration in durability of a power transmission path on a front wheel side while ensuring power performance, in a differential limited state of a power distribution device.SOLUTION: When a state of a power distribution device is put into a differential limited state, and wheel braking torque is applied to each of front wheels and rear wheels, there is executed torque limiting control such that an upper limit value of torque of a power source is set to a smaller value when the wheel braking torque is large than when the wheel braking torque is small. Thus, for example, in the differential limited state of the power distribution device, when large accelerator operation and large brake operation are performed, the torque of the power source is made more likely to be limited, so that high torque is made less likely to be transmitted to a power transmission path on a front wheel side. Further, for example, in the differential limited state of the power distribution device, when the accelerator operation is gradually made larger while the brake operation is gradually made smaller, torque limitation of the power source is gradually released, so that the torque of the power source is increased in a state in which the rear wheels are less likely to cause a minute slip.SELECTED DRAWING: Figure 4
【課題】動力分配装置の差動制限状態において、動力性能を確保しつつ前輪側の動力伝達経路の耐久性の低下を抑制する。【解決手段】動力分配装置の状態が差動制限状態とされ、且つ、前輪及び後輪の各々に車輪制動トルクが付与された場合に、車輪制動トルクが大きいときは小さいときに比べて動力源のトルクの上限値を小さな値に設定するトルク制限制御が行われる。これにより、例えば動力分配装置の差動制限状態において、大きなアクセル操作且つ大きなブレーキ操作が為された場合には、動力源のトルクが制限され易くされるので、前輪側の動力伝達経路に高いトルクが伝達され難くされる。又、例えば動力分配装置の差動制限状態において、ブレーキ操作が徐々に小さくされつつアクセル操作が徐々に大きくされる場合には、動力源のトルクの制限が徐々に解除されるので、後輪が微小スリップし難い状態で動力源のトルクが大きくされる。【選択図】図4
CONTROLLER FOR ALL-WHEEL DRIVE VEHICLE
全輪駆動車両の制御装置
2024-05-15
Patent
Electronic Resource
Japanese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |