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US 8,037,972 B2Granted
Vehicle parking system and method for controlling the same
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKozo Fujita
Life of this patent
Estimating the term…
Abstract
In a vehicle parking system, when a selected shift position is changed between Park and a shift position other than Park, if both an electric motor of an electric parking lock mechanism and an electric motor of an electric parking brake mechanism are operated, these electric motors are started in such a manner that the times at which striking currents supplied to these electric motors reach their peaks are staggered.
Claims19
A vehicle parking system, comprising:
- a parking lock mechanism that is provided in a drive power transfer system of a vehicle, that includes a first electromagnetically-driven actuator which is operated by electric power supplied from a power supply unit, and that mechanically interrupts rotation of a drive power transfer shaft, which transfers drive power from a drive power source of the vehicle to a drive wheel, by operating the first electromagnetically-driven actuator;
- a parking brake mechanism that includes a brake provided to the wheel of the vehicle and a second electromagnetically-driven actuator which is operated by electric power supplied from the power supply unit, and that applies the brake by operating the second electromagnetically-driven actuator to suppress rotation of the wheel;
- and
- an electromagnetically-driven actuator control unit that starts the first electromagnetically-driven actuator and the second electromagnetically-driven actuator at staggered times, when both the parking lock mechanism and the parking brake mechanism are operated based on a predetermined operation command,
- wherein the electromagnetically-driven actuator control unit includes a peak consumption current-based electromagnetically-driven actuator control unit that first starts the first electromagnetically-driven actuator of the first electromagnetically-driven actuator and the second electromagnetically-driven actuator,
- wherein a peak value of the electric current consumed in the first electromagnetically-driven actuator is smaller than a peak value of the electric current consumed in the second electromagnetically-driven actuator.
3 more elements
A vehicle parking system, comprising:
- a parking lock mechanism that is provided in a drive power transfer system of a vehicle, that includes a first electric motor which is operated by electric power supplied from a power supply unit, and that mechanically interrupts rotation of a drive power transfer shaft, which transfers drive power from a drive power source of the vehicle to a drive wheel, by operating the first electric motor;
- a parking brake mechanism that includes a brake provided to the wheel of the vehicle and a second electric motor which is operated by electric power supplied from the power supply unit, and that applies the brake by operating the second electric motor to suppress rotation of the wheel;
- and
- an electric motor unit that starts the first electric motor and the second electric motor in such a manner that a time at which a magnitude of an electric current consumed in the first electric motor reaches a peak and a time at which a magnitude of an electric current consumed in the second electric motor reaches a peak are staggered, when both the parking lock mechanism and the parking brake mechanism are operated based on a predetermined operation command,
- wherein the electric motor unit includes a peak consumption current-based electric motor control unit that first starts the first electric motor of the first electric motor and the second electric motor, and
- wherein a peak value of the electric current consumed in the first electric motor is smaller than a peak value of the electric current consumed in the second electric motor.
3 more elements
A method for controlling a vehicle parking system which includes:
- a parking lock mechanism that is provided in a drive power transfer system of a vehicle, that includes a first electromagnetically-driven actuator which is operated by electric power supplied from a power supply unit, and that mechanically interrupts rotation of a drive power transfer shaft, which transfers drive power from a drive power source of the vehicle to a drive wheel, by operating the first electromagnetically-driven actuator;
- and a parking brake mechanism that includes a brake provided to the wheel of the vehicle and a second electromagnetically-driven actuator which is operated by electric power supplied from the power supply unit, and that applies the brake by operating the second electromagnetically-driven actuator to suppress rotation of the wheel, the method comprising:
- starting the first electromagnetically-driven actuator and the second electromagnetically-driven actuator at staggered times, when both the parking lock mechanism and the parking brake mechanism are operated based on a predetermined operation command,
- wherein the first electromagnetically-driven actuator and the second electromagnetically-driven actuator are started in such a manner that a time at which a magnitude of an electric current consumed in the first electromagnetically-driven actuator reaches a peak and a time at which a magnitude of an electric current consumed in the second electromagnetically-driven actuator reaches a peak are staggered,
- wherein the first electromagnetically-driven actuator, of the first electromagnetically-driven actuator and the second electromagnetically-driven actuator, in which an electric current having a lower peak value is consumed, is started first.
2 more elements
Dependencies are inferred from the claim text.