Hydraulic adjustment unit, brake system, and control method

A brake system, comprising a first group of brake wheel cylinders, a second group of brake wheel cylinders, and a hydraulic adjustment unit, wherein the hydraulic adjustment unit provides a braking force for the first group of brake wheel cylinders through a first brake pipe, and the hydraulic adjustment unit provides a braking force for the second group of brake wheel cylinders through a second brake pipe, wherein the hydraulic adjustment unit comprises:

• a hydraulic adjustment apparatus having a bidirectional pressurization function, wherein the hydraulic adjustment apparatus comprises a first hydraulic chamber and a second hydraulic chamber, wherein:
• the second hydraulic chamber is connected to a first brake pipe in the brake system and a second brake pipe in the brake system, the first brake pipe is used to provide a braking force for the first group of brake wheel cylinders in the brake system, the second brake pipe is used to provide a braking force for the second group of brake wheel cylinders in the brake system, the first brake pipe is provided with a first control valve, a closed-open status of the first control valve controls a closed-open status of the first brake pipe, the second brake pipe is provided with a second control valve, and a closed-open status of the second control valve controls a closed-open status of the second brake pipe;
• the first hydraulic chamber is connected to the second brake pipe through a third brake pipe in the brake system, the first hydraulic chamber provides a braking force for the second group of brake wheel cylinders through the second brake pipe, and when both the first control valve and the second control valve are in a closed state, the third brake pipe is in communication with the first brake pipe through the second brake pipe, and the first hydraulic chamber provides a braking force for the first group of brake wheel cylinders through the first brake pipe, and
• a second end of the first control valve is connected to a second end of the second control valve by using a third control valve, and the third control valve controls connection or disconnection between the second end of the second control valve and the second end of the first control valve.

A method for controlling a brake system, wherein the brake system comprises:

• a hydraulic adjustment apparatus having a bidirectional pressurization function, wherein a hydraulic cylinder of the hydraulic adjustment apparatus is divided into a first hydraulic chamber and a second hydraulic chamber by a piston, wherein:
• the second hydraulic chamber is connected to a first brake pipe in the brake system and a second brake pipe in the brake system, the first brake pipe is used to provide a braking force for a first group of brake wheel cylinders in the brake system, the second brake pipe is used to provide a braking force for a second group of brake wheel cylinders in the brake system, the first brake pipe is provided with a first control valve, a closed-open status of the first control valve controls a closed-open status of the first brake pipe, the second brake pipe is provided with a second control valve, and a closed-open status of the second control valve controls a closed-open status of the second brake pipe;
• the first hydraulic chamber is connected to the second brake pipe through a third brake pipe in the brake system, the first hydraulic chamber provides a braking force for the second group of brake wheel cylinders through the second brake pipe, and when both the first control valve and the second control valve are in a closed state, the third brake pipe is in communication with the first brake pipe through the second brake pipe, and the first hydraulic chamber provides a braking force for the first group of brake wheel cylinders through the first brake pipe;
• a second end of the first control valve is connected to a second end of the second control valve by using a third control valve, and the third control valve controls connection or disconnection between the second end of the second control valve and the second end of the first control valve;
• the brake system further comprises a fourth brake pipe, the second hydraulic chamber is connected to a first end of the fourth brake pipe, a second end of the fourth brake pipe is connected to a first end of the second control valve, and the fourth brake pipe is provided with a fourth control valve to control closing or opening of the fourth brake pipe;
• and
• the method comprises:
• generating, by a controller, a control instruction, wherein the control instruction is used to control a driving apparatus;
• sending, by the controller, the control instruction to the driving apparatus, to control the driving apparatus to drive the piston to move along an inner wall of the hydraulic cylinder to increase or decrease pressure of brake fluid in at least one of the first group of brake wheel cylinders or the second group of brake wheel cylinders;
• and
• when a braking circuit for providing the braking force for the first group of brake wheel cylinders fails, and the first hydraulic chamber is required to provide the braking force for the second group of brake wheel cylinders, controlling, by the controller, all of the first control valve, the second control valve, and the fourth control valve to be in an open state.