B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
B60T 8/62 (2006.01) B60T 8/1761 (2006.01) B60T 8/50 (2006.01) B60T 13/66 (2006.01)
Patent
CA 2125860
2125860 9311984 PCTABS00022 A method of controlling the operation of a vehicle brake system, the brake system including a master cylinder controlled by the operator of the vehicle to vary applied brake pressure to various brake mechanisms during normal service brake operation and an antiskid brake subsystem, activated when one or more vehicle wheels are skidding, for controlling brake pressure in the various brake mechanisms to permit various wheels to operate in a nonskidding manner. The method comprising the steps of: 1) determining and storing a control relationship which relates changes in vehicle deceleration and changes in applied brake pressure, with non of the wheels of the vehicle skidding, 2) subsequently measuring at least two values (P1, P2) of applied brake pressure to determine changes in applied brake pressure .DELTA. P during a measurement interval and calculating the change in control deceleration .DELTA. Dci corresponding to the change .DELTA. P in applied brake pressure utilizing the control relationship; directly measuring actual vehicle deceleration Di; determining a change in actual vehicle deceleration .DELTA. Di corresponding to the change in applied brake pressure; determining if the change in actual vehicle deceleration over the measurement interval is inconsistent with the change in control deceleration; and if such inconsistency is determined, reducing applied brake pressure to a determinable first level sufficient to cause actual vehicle deceleration to approach the control deceleration resulting from the reduced brake pressure.
Borden Ladner Gervais Llp
Robert Bosch Technology Corporation
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