US 11,926,298 B2
Brake device
Yujiro Kondo, Tokyo (JP); and Tomonori Imaizumi, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Nov. 18, 2022, as Appl. No. 17/989,990.
Claims priority of application No. 2021-197321 (JP), filed on Dec. 3, 2021.
Prior Publication US 2023/0174027 A1, Jun. 8, 2023
Int. Cl. B60T 7/06 (2006.01); B60T 13/52 (2006.01); G05G 1/40 (2008.04)
CPC B60T 7/06 (2013.01) [B60T 13/52 (2013.01); G05G 1/40 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A brake device comprising:
a brake pedal rotatable using an arm rotary shaft disposed on one end of a pedal arm used as a fulcrum;
an input rod to which a pedal force input to the brake pedal is transmitted as a thrust;
a master cylinder configured to generate a brake hydraulic pressure responsive to the thrust input to the input rod;
a guide rail disposed on the pedal arm and extending along a longitudinal direction of the pedal arm;
a slider coupled to the pedal arm via the guide rail and movable on the guide rail;
a coupling arm comprising a first end rotatably coupled to the slider, and a second end rotatably coupled to the input rod, the second end being different from the first end;
a negative pressure brake booster configured to increase the thrust transmitted to the input rod;
a negative pressure sensor configured to detect a negative pressure introduced to the brake booster; and
a controller configured to control a moving position of the slider relative to the guide rail;
wherein the controller is configured such that, in a case where the negative pressure detected by the negative pressure sensor is lower than a preset threshold, the controller moves the slider toward the arm rotary shaft.