Hydraulic control unit, braking system, and control method

A braking system, comprising:

• a first group of wheel cylinders;
• a second group of wheel cylinders;
• and
• a hydraulic control unit, the hydraulic control unit comprising a hydraulic control apparatus with a bidirectional pressurization function, wherein the hydraulic control apparatus comprises a first hydraulic chamber and a second hydraulic chamber,
• wherein the second hydraulic chamber is connected to a first end of a first control valve in a first brake line and is connected to a first end of a second control valve in a second brake line, wherein a first part of a brake fluid in the second hydraulic chamber is configured to flow to a fourth brake line through a seventh brake line, and to flow to the first brake line through the fourth brake line, and wherein a second part of the brake fluid in the second hydraulic chamber is configured to flow to the second brake line through the seventh brake line,
• wherein the first control valve is configured to control a first connected/disconnected state of the first brake line, the second control valve is configured to control a second connected/disconnected state of the second brake line, and the first end of the first control valve is connected to the first end of the second control valve through the fourth brake line,
• wherein the first hydraulic chamber is connected to the fourth brake line through a third brake line,
• wherein the hydraulic control unit is configured to provide a braking force for the first group of wheel cylinders and/or the second group of wheel cylinders,
• wherein the first hydraulic chamber and the second hydraulic chamber are formed by separating a hydraulic cylinder of the hydraulic control apparatus by a piston in the hydraulic control apparatus, and
• wherein the hydraulic control unit further comprises:
• an actuator support disposed at an end of the first hydraulic chamber, wherein the actuator support is configured to support an actuator, and the actuator is configured to push the piston to move along a piston stroke in the hydraulic cylinder,
• a first hydraulic control port disposed on the actuator support,
• a second hydraulic control port disposed on the actuator, wherein a first end of the second hydraulic control port is connected to the first hydraulic chamber, and
• a first guide groove with a particular length disposed along an outer periphery of the actuator.

A control method for a braking system, wherein the braking system comprises a hydraulic control apparatus with a bidirectional pressurization function, the hydraulic control apparatus comprises a piston, a hydraulic cylinder, and an actuator, and the piston separates the hydraulic cylinder into a first hydraulic chamber and a second hydraulic chamber,

• wherein the second hydraulic chamber is connected to a first end of a first control valve in a first brake line, and is connected to a first end of a second control valve in a second brake line;
• a first part of a brake fluid in the second hydraulic chamber is configured to flow to a fourth brake line through a seventh brake line, and to flow to the first brake line through the fourth brake line;
• a second part of the brake fluid in the second hydraulic chamber is configured to flow to the second brake line through the seventh brake line;
• the first brake line is configured to provide a first braking force for a first group of wheel cylinders, and the second brake line is configured to provide a second braking force for a second group of wheel cylinders;
• the first control valve is configured to control a first connected/disconnected state of the first brake line, the second control valve is configured to control a second connected/disconnected state of the second brake line, and the first end of the first control valve is connected to the first end of the second control valve through the fourth brake line,
• wherein the first hydraulic chamber is connected to the fourth brake line through a third brake line, and
• wherein the control method comprises:
• generating, by a controller, a control instruction, wherein the control instruction is used to control a drive apparatus in the braking system;
• sending, by the controller, the control instruction to the drive apparatus, to control the drive apparatus to drive the piston to move along an inner wall of the hydraulic cylinder, to increase or decrease pressure of the brake fluid in the first group of wheel cylinders and/or the second group of wheel cylinders,
• wherein the first hydraulic chamber and the second hydraulic chamber are formed by separating a hydraulic cylinder of the hydraulic control apparatus by a piston in the hydraulic control apparatus, an actuator support is disposed at an end of the first hydraulic chamber, the actuator support is configured to support the actuator, the actuator configured to push the piston to move along a piston stroke in the hydraulic cylinder, a first hydraulic control port is disposed on the actuator support, a second hydraulic control port is disposed on the actuator, a first end of the second hydraulic control port is connected to the first hydraulic chamber, and a first guide groove with a particular length is disposed along an outer periphery of the actuator.