US 12,358,475 B2
Vehicle braking device
Yusuke Shibata, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Aug. 23, 2023, as Appl. No. 18/454,689.
Application 18/454,689 is a continuation of application No. PCT/JP2022/005231, filed on Feb. 10, 2022.
Claims priority of application No. 2021-028646 (JP), filed on Feb. 25, 2021.
Prior Publication US 2023/0398967 A1, Dec. 14, 2023
Int. Cl. B60T 8/172 (2006.01); B60T 13/74 (2006.01); B60T 17/22 (2006.01)
CPC B60T 8/172 (2013.01) [B60T 13/74 (2013.01); B60T 17/22 (2013.01); B60T 2250/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A vehicle braking device to be mounted on a vehicle having electric brakes for generating a braking force at corresponding wheels, the vehicle braking device comprising
a braking force controller configured to control the braking force generated by each of the electric brakes, wherein
a relationship between an electric current and the braking force in each of the electric brakes has a hysteresis characteristic,
the hysteresis characteristic indicates that the braking force increases along a positive efficiency line when the electric current increases, the braking force is held constant when the electric current decreases from a turning value, at which the electric current changes from an increase to a decrease, to a holding threshold, and the braking force decreases along an inverse efficiency line when the electric current decreases from the holding threshold,
a section in which the braking force is held constant when the electric current decreases from the turning value to the holding threshold is a braking force holding section,
a wheel corresponding to each of the electric brakes in which the braking force increases along the positive efficiency line is a positive efficiency braking wheel,
a wheel corresponding to each of the electric brakes operating in the braking force holding section is a braking force holding wheel, and
the braking force controller is configured to alternately switch between the positive efficiency braking wheel and the braking force holding wheel while a required braking force of the vehicle increases or is held, except when the vehicle satisfies a predetermined application exclusion requirement.