Vehicle drive system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroshi Isono
Life of this patent
Estimating the term…
Abstract
A vehicle drive system that ensures brake force in the event of failure of a brake device or a controller. In vehicle drive system, a first brake device applies a brake torque to a pair of front wheels and a second brake device applies a brake torque to a pair of rear wheels. A first brake system includes a first controller and the first brake device, and a second brake system includes a second controller and the second brake device. In the event of occurrence of failure in one of the first brake system and the second brake system, only the other brake system generates brake torque.
Claims15
A vehicle drive system comprising:
- a first front brake device and a second front brake device that apply a brake torque to a pair of front wheels;
- a first rear brake device and a second rear brake device that apply a brake torque to a pair of rear wheels;
- a first controller that is configured to control the brake torque generated by the first front brake device and the second rear brake device;
- a second controller that is configured to control the brake torque generated by the second front brake device and the first rear brake device;
- a first brake system including the first controller, the first front brake device, and the second rear brake device;
- a second brake system including the second controller, the second front brake device, and the first rear brake device;
- and
- a detector that detects an occurrence of failure in the first brake system and the second brake system, such that (i) in response to the detector detecting the occurrence of failure in the first brake system, the second controller of the second brake system controls the second front brake device and the first rear brake device to apply the brake torque to the pair of front wheels and the pair of rear wheels, and (ii) in response to the detector detecting the occurrence of failure in the second brake system, the first controller of the first brake system controls the first front brake device and the second rear brake device to apply the brake torque to the pair of front wheels and the pair of rear wheels.
A vehicle drive system comprising:
- a third brake device that applies a brake torque to a left front wheel;
- a fourth brake device that applies a brake torque to a right front wheel;
- a fifth brake device that applies a brake torque to a left rear wheel;
- a sixth brake device that applies a brake torque to a right rear wheel;
- a third controller that is configured to control each of the brake torque generated by the fourth brake device and the brake torque generated by the fifth brake device;
- a fourth controller that is configured to control each of the brake torque generated by the third brake device and the brake torque generated by the sixth brake device;
- a third brake system including the third controller, the fourth brake device, and the fifth brake device;
- a fourth brake system including the fourth controller, the third brake device, and the sixth brake device;
- and
- a detector that detects an occurrence of failure in the third brake system and the fourth brake system, such that (i) in response to the detector detecting the occurrence of failure in the third brake system, the fourth controller of the fourth brake system controls the fourth brake device to apply the brake torque to the pair of rear wheels, and (ii) in response to the detector detecting the occurrence of failure in the fourth brake system, the third controller of the third brake system controls the third brake device to apply the brake torque to the pair of front wheels.
Dependencies are inferred from the claim text.