Hydraulic brake apparatus for vehicle and control method therefor
AssigneeHyundai Mobis Co., Ltd.
InventorsYong Cheol Seol, Jee Sang Lee, Jae Won Seo, Jin Ho Seong, Hwan Gon Kim
Life of this patent
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Abstract
A method for controlling a hydraulic brake apparatus for a vehicle is disclosed. The method includes: a target valve group closing process in which a control unit controls a brake device to close a target brake group selectively including the plurality of valves; a hydraulic pressure supply process in which the control unit controls the brake device to supply hydraulic pressure to at least one of channels separated by closing the target valve group; and a contaminant removal process in which the control unit controls the brake device such that the target valve group opens and the fluid washes the target valve group.
Claims16
A method of controlling a brake device for a vehicle, the brake device including (1) a plurality of valves configured to selectively transmit a hydraulic pressure to a plurality of wheel brakes and (2) a pressurizer configured to pressurize a fluid, the method comprising:
- performing a process of removing contaminant from the brake device, the process of removing the contaminant including:
- closing a target valve group including one or more selected valves of the plurality of valves;
- supplying a hydraulic pressure to at least one of a plurality of channels closed by closing of the target valve group;
- and
- opening the target valve group and causing the fluid to wash the target valve group,
- wherein the brake device includes a connection valve configured to establish or discontinue a fluid connection between at least some of the plurality of wheel brakes and the other of the plurality of wheel brakes,
- wherein the pressurizer includes a piston and a plurality of hydraulic chambers including a first hydraulic chamber positioned in front of the piston and a second hydraulic chamber positioned behind the piston,
- and the method of controlling the brake device further comprising:
- determining at least one of a leakage occurrence and a leakage position in the brake device,
- wherein the at least one of leakage occurrence and leakage position is determined based on piston displacements respectively measured during pressurization of the first hydraulic chamber and the second hydraulic chamber, in both open and closed states of the connection valve.
A brake device for a vehicle, comprising:
- a plurality of valves configured to selectively transmit a hydraulic pressure to a plurality of wheel brakes;
- a pressurizer for pressurizing a fluid;
- and
- a control unit configured to:
- close a target valve group including one or more selected valves of the plurality of valves;
- supply a hydraulic pressure to at least one of a plurality of channels closed by closing of the target valve group;
- and
- open the target valve group and cause the fluid to wash the target valve group,
- wherein the brake device includes a connection valve configured to establish or discontinue a fluid connection with at least some of the plurality of wheel brakes and the other of the plurality of wheel brakes,
- wherein the pressurizer includes a piston and a plurality of hydraulic chambers including a first hydraulic chamber positioned in front of the piston and a second hydraulic chamber positioned behind the piston,
- wherein the control unit is further configured to:
- determine a leakage occurrence and leakage position in the brake device;
- and
- control the pressurizer pressurizes the fluid at a predetermined pressure;
- and
- control the piston to pressurize the fluid in the first hydraulic chamber at a first pressure or to pressurize the fluid in the second hydraulic chamber at a second pressure, and
- determine at least one of the leakage occurrence and leakage position in the brake device based on a first displacement of the piston when the first hydraulic chamber is pressurized at the first pressure and a second displacement of the piston when the second hydraulic chamber is pressurized at the second pressure,
- wherein the first displacement of the piston and the second displacement of the piston are measured in both open and closed states of the connection valve.
Dependencies are inferred from the claim text.