Patent ID: 9358966
Filing Date: 2016-06-07
CPC Classification: B60T

Claim Text:
1. A hydraulic braking system comprising: one or more hydraulic brake accumulators capable of an associated pre-charge pressure, the hydraulic brake accumulator to discharge pressurized fluid to a hydraulic brake; a pressure sensor fluidly coupled to the hydraulic brake accumulator; a pump to provide fluid to the hydraulic brake accumulator during a charge cycle; and a controller configured to receive pressure readings from the pressure sensor indicative of the pressure of the hydraulic brake accumulator, the controller configured to: in response to fluid being provided to the hydraulic accumulator, determine a first rate of pressure change, a second rate of pressure change different than the first rate, and a pressure at a transition between the first and second rates; and determine a pre-charge pressure of the hydraulic brake accumulator based on said pressure at the transition.