US 11,745,713 B2
Electric booster for autonomous vehicle having dual actuator
Joung-Hee Lee, Gyeonggi-do (KR); Ung-Hee Shin, Jeollanam-do (KR); and Jae-Hun Shim, Gyeonggi-do (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed on Sep. 21, 2020, as Appl. No. 17/26,863.
Claims priority of application No. 10-2020-0058899 (KR), filed on May 18, 2020.
Prior Publication US 2021/0354677 A1, Nov. 18, 2021
Int. Cl. B60T 13/74 (2006.01); B60T 7/04 (2006.01); B60T 13/68 (2006.01); B60T 8/40 (2006.01)
CPC B60T 13/745 (2013.01) [B60T 7/042 (2013.01); B60T 8/4077 (2013.01); B60T 13/686 (2013.01); B60T 2220/04 (2013.01); B60Y 2400/81 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electric brake booster for an autonomous vehicle having a dual actuator, comprising:
a body part configured to receive a power cylinder for generating braking pressure in an autonomous driving/braking mode;
a driving shaft movable in an axial direction in the power cylinder and coupled to a piston;
a first motor connected to a first side of the driving shaft and configured to provide driving power to the driving shaft;
a second motor connected to a second side of the driving shaft and configured to provide driving power to the driving shaft in a direction equal to a direction of the driving power provided from the first motor; and
a controller configured to determine whether the first motor or the second motor operates normally and to simultaneously or separately operate the first motor and the second motor based on a magnitude of the pressure in the power cylinder or on whether emergency braking occurs;
wherein any one of the first motor and the second motor has a hollow structure to receive the piston therein and move the piston.