Patent ID: 9221436
Filing Date: 2015-12-29
Classification: B60T

Abstract:
1. A vehicle brake pressure controller comprising: a running environment recognizing unit mounted on a vehicle and recognizing a running environment ahead the vehicle; a brake driving unit supplying a brake fluid pressure to a brake provided in the vehicle and pressing a friction member against a rotating member rotating together with an axle of the brake; and a brake controlling unit determining the brake fluid pressure supplied to the brake from the brake driving unit, wherein the brake controlling unit includes: a brake actuation object detecting unit detecting a brake actuation object based on the running environment recognized by the running environment recognizing unit; a target brake pre-pressure actuation distance setting unit determining a target brake pre-pressure actuation distance based on a relative speed between the brake actuation object and the vehicle when the brake actuation object detecting unit detects a brake actuation object, wherein the target brake pre-pressure actuation distance setting unit determines the target brake pre-pressure actuation distance by correcting a basic brake pre-pressure actuation distance using a learning correction factor, the basic brake pre-pressure actuation distance being determined based on the relative speed between the brake actuation object and the vehicle, the learning correction factor being set based on a vehicle speed of the vehicle; a brake detecting unit detecting pressing of a brake pedal, wherein the brake controlling unit includes a brake pre-pressure learning correction factor updating unit to update the learning correction factor according to a difference between the target brake pre-pressure actuation distance and the distance to the brake actuation object, the brake actuation object being detected by the running environment recognizing unit when the brake detector detects the pressing of the brake pedal; and a brake pre-pressure outputting unit to output a driving signal to the brake driving unit before an operation of a brake pedal is performed when a distance between the vehicle and the brake actuation object reaches the target brake pre-pressure actuation distance, the driving signal generating brake pre-pressure to bring the friction member into slight contact with or close to the rotating member.