Control system for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKazuma AOKI, Takeshi Kitahata, Noritaka Takuda, Hiroto Amada, Tatsuya Kawamura, Takeshi Ishiwada
Life of this patent
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Abstract
A control system for a vehicle configured to suppress vibrations and shocks when releasing a parking lock mechanism in a situation where a drive shaft is twisted. The control system is configured to: control the motor to start generation of a torque counteracting an estimated torsional torque acting on the driver shaft whose magnitude is equal to the estimated torsional torque or smaller, when the rotary member being locked by the parking lock mechanism is predicted to be released; and terminate the torque generation by the motor when the motor generating the torque starts rotating.
Claims9
A control system for a vehicle, comprising:
- a drive shaft in which one end thereof is joined to a wheel;
- a motor that applies a torque to the drive shaft;
- and
- a parking lock mechanism that stops a rotation of a predetermined rotary member arranged between the motor and the drive shaft by locking the rotary member, and that allows the rotary member to rotate by releasing the rotary member;
- the control system comprising:
- a controller that controls the motor,
- wherein the controller comprises:
- a parking determiner configured to determine that the rotary member is locked by the parking lock mechanism;
- a predictor configured to predict that the rotary member being locked by the parking lock mechanism will be released by the parking lock mechanism;
- a torsional torque estimator configured to estimate a torsional torque acting on the drive shaft;
- a motor control starter configured to control the motor to start generation of a torque counteracting the estimated torsional torque whose magnitude is equal to the estimated torsional torque or smaller, when the predictor predicts that the rotary member being locked by the parking lock mechanism will be released by the parking lock mechanism;
- and
- a motor control terminator configured to terminate the torque generation by the motor when the motor generating the torque starts rotating.
Dependencies are inferred from the claim text.