US 12,005,880 B2
Vehicle brake system
Misuzu Shimazaki, Toyota (JP); Yusuke Kamiya, Toyota (JP); and Ken Kuzuya, Kariya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and ADVICS CO., LTD., Kariya (JP)
Filed by Toyota Jidosha Kabushiki Kaisha, Toyota (JP); and ADVICS CO., LTD., Kariya (JP)
Filed on Jan. 11, 2022, as Appl. No. 17/573,231.
Claims priority of application No. 2021-004700 (JP), filed on Jan. 15, 2021.
Prior Publication US 2022/0227341 A1, Jul. 21, 2022
Int. Cl. B60T 8/94 (2006.01); B60T 13/66 (2006.01); B60T 17/22 (2006.01); F16D 66/00 (2006.01)
CPC B60T 8/94 (2013.01) [B60T 13/662 (2013.01); B60T 17/22 (2013.01); B60T 2201/03 (2013.01); B60T 2270/402 (2013.01); B60T 2270/406 (2013.01); B60T 2270/88 (2013.01); F16D 2066/001 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A brake system for a vehicle, comprising:
a first hydraulic-pressure control mechanism configured to control a hydraulic pressure in a plurality of hydraulic brakes respectively provided for a plurality of wheels of the vehicle to thereby control a braking force to be applied to the vehicle;
a second braking-force control mechanism configured to control the braking force, the second braking-force control mechanism being different from the first hydraulic-pressure control mechanism; and
a controller including a first-abnormal-state detecting device configured to detect whether the first hydraulic-pressure control mechanism is in a first abnormal state as an abnormal state,
wherein the controller is configured to:
control the first hydraulic-pressure control mechanism so as to control the braking force when the first-abnormal-state detecting device does not detect that the first hydraulic-pressure control mechanism is in the first abnormal state; and
control not the first hydraulic-pressure control mechanism but the second braking-force control mechanism so as to control the braking force when the first-abnormal-state detecting device detects that the first hydraulic-pressure control mechanism is in the first abnormal state,
wherein the brake system comprises a temperature obtaining device configured to obtain a temperature of a working fluid in the brake system,
wherein the controller includes:
a second-abnormal-state detecting device configured to detect whether the first hydraulic-pressure control mechanism is in a second abnormal state, the second abnormal state being a state that the first hydraulic-pressure control mechanism reaches before reaching the first abnormal state; and
an assist control device configured to control the second braking-force control mechanism so as to control the braking force when an assist wait time elapses after the second-abnormal-state detecting device has detected that the first hydraulic-pressure control mechanism is in the second abnormal state, the assist wait time being determined based on the temperature of the working fluid obtained by the temperature obtaining device.