The invention discloses a dual-motor drive-by-wire pressure sequence adjusting brake system. Two motors are used for driving a ball screw assembly to push two high pressure cavities of a brake master cylinder to internally generate brake pressure. The system is provided with only four electromagnetic valves. The electromagnetic valves are arranged in pairs to be communicated with the two high pressure cavities of the brake master cylinder respectively, and therefore wheel cylinder pressure is adjusted. For brake wheel cylinders needing pressure decreasing or increasing, the normally open electromagnetic valves connected with brake wheel cylinders not needing pressure decreasing or increasing are closed. A motor control unit is used for controlling a second motor to rotate in reverse direction or forward direction. When the pressure of the brake wheel cylinders needing pressure decreasing or increasing is decreased or increased to a preset value, the normally open electromagnetic valves connected with the brake wheel cylinders needing pressure decreasing or increasing are closed, and brake wheel cylinder pressure decreasing or increasing is achieved. The dual-motor drive-by-wire pressure sequence adjusting brake system has the advantages that various functions such as ABS, TCS and ESP are integrated, a traditional ABS pressure adjusting unit is simplified, and the wheel cylinder pressure can be adjusted only through the four electromagnetic valves.
Dual-motor drive-by-wire pressure sequence adjusting brake system
2015-06-24
Patent
Elektronische Ressource
Englisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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