Research on ESC Hydraulic Control Unit Property and Pressure Estimation

Vehicle mounted Electronic Stability Control (ESC) requires exact estimation of wheel brake cylinder pressure. A model of pressure transfer property is established according to the structure of ESC Hydraulic Control Unit (HCU). The property model of HCU is established for pressure estimation algorithm. The property is acquired with the ESC hardware in loop (HiL) test bed, to calibrate the model parameters. The algorithm is then used in the closed loop control of HCU. The test is carried out to verify the effect of pressure estimation method. The test result demonstrates that the algorithm can supply stable pressure information to the ESC system.