| 摘要 |
PROBLEM TO BE SOLVED: To shorten a time lag from a driver's accelerator maneuver to start of a vehicle under a situation of a road surface causing driving wheels to be accelerated and slipped.SOLUTION: When a driver's accelerator maneuver is not performed and a vehicle speed V falls below a micro-low speed criterial threshold V1, a brake ECU decides for each of driving wheels whether a ground load F is smaller than a necessity-of-preliminary pressurization criterial threshold F1. The driving wheel whose ground load F is decided to be smaller than the necessity-of-preliminary pressurization criterial threshold F1 is regarded as an object wheel, and the wheel cylinder of the object wheel is pressurized with a preliminary pressurization quantity Px. After the accelerator maneuver is detected, when the vehicle speed V becomes equal to or larger than a depressurization initiation threshold V2, the brake ECU initiates depressurization of the wheel cylinder.SELECTED DRAWING: Figure 6 |
