Brake unit
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroshi Isono
Life of this patent
Estimating the term…
Abstract
A brake unit that allows the vehicle to evacuate safely in the event of brake failure while maintaining a braking performance. The brake unit is mounted on a vehicle together with a motor drive unit 2 to control brake force in accordance with a stroke of a brake pedal and a pedal force. Each brake system comprises: a stroke sensor; a pedal force sensor; a brake mechanism applying brake force to a driveshaft; a controller controlling the brake mechanism based on the stroke and the pedal force; and a powersource supplying electricity to the brake mechanism and the controller. The first controller 13 and the second controller support each other to control brake force.
Claims6
A brake unit, that is mounted on a vehicle together with a motor drive unit including a drive motor that generates a drive torque to establish a drive force of the vehicle and a power transmission mechanism that delivers the drive torque to a driveshaft, and that controls a brake force applied to the vehicle in accordance with a stroke of a brake pedal and a pedal force applied to the brake pedal, comprising:
- a first brake system comprising:
- a first sensor that detects a stroke of the brake pedal and the pedal force applied to the brake pedal;
- a first brake mechanism that is actuated by an electric energy to apply a frictional brake force to the driveshaft;
- a first controller that controls the first brake mechanism based on the stroke and the pedal force detected by the first sensor;
- and a first power source that supplies electricity to the first brake mechanism and the first controller;
- and
- a second brake system comprising:
- a second sensor that detects a stroke of the brake pedal and the pedal force applied to the brake pedal;
- a second brake mechanism that is actuated by an electric energy to apply a frictional brake force to the driveshaft;
- a second controller that controls the second brake mechanism based on the stroke and the pedal force detected by the second sensor;
- and a second power source that supplies electricity to the second brake mechanism and the second controller,
- wherein the first controller comprises a first communication device that transmits and receives a signal to/from the other controller,
- the second controller comprises a second communication device that transmits and receives a signal to/from the other controller,
- the first communication device and the second communication device are connected to each other, and
- the first controller and the second controller support each other to control the brake force.
Dependencies are inferred from the claim text.