US 12,291,182 B2
Road surface detection using anti-lock braking system pressure sensor
Kurt W. Person, Florence, WI (US)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on May 2, 2022, as Appl. No. 17/734,910.
Prior Publication US 2023/0347853 A1, Nov. 2, 2023
Int. Cl. B60T 8/172 (2006.01); B60G 17/016 (2006.01); B60G 17/0165 (2006.01); B60G 17/0195 (2006.01); B60T 8/1763 (2006.01)
CPC B60T 8/172 (2013.01) [B60G 17/0164 (2013.01); B60G 17/0165 (2013.01); B60G 17/0195 (2013.01); B60T 8/17636 (2013.01); B60G 2202/413 (2013.01); B60G 2400/82 (2013.01); B60T 2210/10 (2013.01); B60T 2260/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A road surface detection system, the system comprising:
a hydraulic unit of an anti-lock braking system, the hydraulic unit including a preload adjuster;
a plurality of pressure sensors disposed within the vehicle, each of the plurality of pressure sensors configured to generate pressure sensor data, and
a controller configured to:
receive the pressure sensor data from the plurality of pressure sensors,
determine a target preload pressure level,
compare the pressure sensor data with the target preload pressure level to calculate a pressure differential between the pressure sensor data and the target preload pressure level,
determine a road surface based upon the calculated pressure differential, and regulate the preload adjuster to change the pressure within the hydraulic unit based upon the road surface,
wherein the determined preload target pressure is based upon a preconfigured vehicle load level.