Vehicle control system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTatsuya Imamura
Life of this patent
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Abstract
A vehicle control system configured to limit damage to an electric storage device even if a speed of a motor is changed abruptly. The control system includes a differential mechanism connected to an engine, a motor, and drive wheels, and a clutch. The control system includes a controller is configured to calculate an upper limit power possible to be applied or discharged to or from an electric storage device when a condition to engage the clutch is satisfied and restrict the electric power to be applied or discharged to or from the electric storage device when the electric power is equal to or less than a maximum allowable power that is less than the upper limit power before the clutch is engaged.
Claims11
A vehicle control system that is applied to a vehicle, the vehicle control system comprising:
- a prime mover;
- a first motor having a generating function;
- at least a pair of drive wheels;
- an electric storage device from which an electric power is supplied to the first motor, and to which an electric power generated by the first motor is supplied;
- a differential mechanism that includes a plurality of rotary elements including a first rotary element connected to the prime mover, a second rotary element connected to the first motor, and a third rotary element connected to the drive wheels, the differential mechanism delivering torque of the prime mover, at least partially, to the drive wheels when a reaction torque established by the first motor is applied to the differential mechanism;
- a clutch that is selectively engaged to transmit torque between a predetermined pair of the plurality of rotary elements of the differential mechanism, a speed of one of the rotary elements of the predetermined pair of the rotary elements being changed with a change in a speed of the first motor, and the clutch is allowed to be engaged when a speed difference between the predetermined pair of the rotary elements is less than a predetermined value and;
- a controller that controls the electric power applied to the electric storage device and the electric power discharged from the electric storage device, the controller being configured to:
- calculate an upper limit power possible to be discharged from the electric storage device or possible to be applied to the electric storage device when a condition to engage the clutch that is disengaged is satisfied, and
- restrict the electric power to be discharged from the electric storage device or to be applied to the electric storage device to an electric power equal to or less than, before engaging the clutch, a maximum allowable power to be consumed or generated by the first motor that is less than the upper limit power.
Dependencies are inferred from the claim text.