Road surface detection using anti-lock braking system pressure sensor
AssigneeRobert Bosch GmbH
InventorKurt W. Person
Life of this patent
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Abstract
A road surface detection system, in one example the system includes a hydraulic unit of an anti-lock braking system, the hydraulic unit including a preload adjuster, and a plurality of pressure sensors configured to generate pressure sensor data. The system also includes 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.
Claims19
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.
A method of road surface detection, the method comprising:
- receiving, from each of a plurality of pressure sensors, pressure sensor data;
- obtaining a target preload pressure level;
- comparing, via the controller, the pressure sensor data with the target preload pressure level;
- determining, by the controller, a pressure differential between the pressure sensor data and the target preload pressure level;
- determining, by the controller, a road surface based upon the pressure differential, and
- regulating, by the controller, the preload adjuster to change the pressure within the hydraulic unit based upon the road surface,
- wherein the target preload pressure level is based upon a preconfigured vehicle load level.
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 terrain type based upon the calculated pressure differential, and
- regulate the preload adjuster to change the pressure within the hydraulic unit based upon the terrain type,
- wherein the target preload pressure level is based upon a preconfigured vehicle load level.
Dependencies are inferred from the claim text.