Patent ID: 6196365
Filing Date: 2001-03-06
Classification: B60T

Abstract:
A method of purging air from a braking hydraulic pressure control system for a vehicle comprising the steps of:switching between communicating and shut-off states between a master cylinder and a first hydraulic passage, and between communicating and shut-off states between the master cylinder and a first open passage, wherein a first portion of a first switching valve means is positioned between the master cylinder and the first hydraulic passage, and a second portion of the first switching valve means is positioned between the master cylinder and the first open passage;switching between communicating and shut-off states between the master cylinder and a second hydraulic passage, and between communicating and shut-off states between the master cylinder and a second open passage, wherein a first portion of a second switching valve means is positioned between the master cylinder and the second hydraulic passage, and a second portion of the second switching valve means is positioned between the master cylinder and the second open passage;controlling the hydraulic pressure in a first driving-wheel brake by switching between communicating and shut-off states between the first hydraulic passage and a first driving-wheel brake, and between communicating and shut-off states between the first driving-wheel brake and a first reservoir and a first pump, wherein a first portion of a first driving-wheel control valve means is positioned between the first hydraulic passage and the first driving-wheel brake, and a second portion of the first driving-wheel control valve means is positioned between the first driving-wheel brake and the first reservoir, and wherein an inlet port of the first pump is connected to the first reservoir, and an outlet port of the first pump is connected to the first hydraulic passage; andcontrolling the hydraulic pressure to a second driving-wheel brake by switching between communicating and shut-off states between the second hydraulic passage and a second driving-wheel brake, and between communicating and shutoff states between the second driving-wheel brake and a second reservoir and a second pump, wherein a first portion of a second driving-wheel control valve means is positioned between the second hydraulic passage and the second driving-wheel brake, and a second portion of the second driving-wheel control valve means is positioned between the second driving-wheel brake and the second reservoir, and wherein an inlet port of the second pump is connected to the second reservoir, and an outlet port of the second pump is connected to the second hydraulic passage.