Brake system and control method thereof
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsYoung-Jin Jo, Jung-Nam Han
Life of this patent
Estimating the term…
Abstract
A brake system may include a first hydraulic line; a second hydraulic line; a third hydraulic line; a fourth hydraulic line; a third switch valve; a fourth switch valve; a fifth hydraulic line; a sixth hydraulic line. The brake control unit can suppress a Vapor Lock even in a frequency brake operation in the section in which the downhill traveling from the highland to the flat is continued.
Claims20
A brake system having a first hydraulic supply line and a second hydraulic supply line in which an operating fluid is individually provided from a master cylinder of a vehicle, the brake system comprising:
- a first hydraulic line having a first valve and branched from the first hydraulic supply line to connect between a first caliper of a first wheel brake;
- a second hydraulic line having a second valve and branched from the first hydraulic supply line to connect between a second caliper of a second wheel brake disposed on a diagonal line of the first wheel brake;
- a third hydraulic line having a third valve and branched from the second hydraulic supply line to connect between a third caliper of a third wheel brake in a position opposite to the second wheel brake;
- a fourth hydraulic line having a fourth valve and branched from the second hydraulic supply line to connect between a fourth caliper of a fourth wheel brake disposed on a diagonal line of the third wheel brake;
- a third switch valve disposed on one of the first hydraulic supply line and the second hydraulic supply line;
- a fourth switch valve which is one of the second valve or the third valve;
- a fifth hydraulic line having a first switch valve and configured for connecting the first hydraulic line with the fourth hydraulic line;
- a sixth hydraulic line having a second switch valve and configured for connecting the second hydraulic line with the third hydraulic line;
- and
- a brake control unit configured of determining when the vehicle satisfies a first condition which is in a normal traveling state of the vehicle, or when the vehicle satisfies a second condition which is in an alpine traveling state of the vehicle.
A method of controlling a brake, the method comprising:
- determining, by a brake control unit, traveling of a vehicle, in which supplies a first operating fluid to a first wheel brake and a second wheel brake while supplying a second operating fluid to a third wheel brake and a fourth wheel brake by setting a brake system to an X pipe mode, in a response that the traveling of the vehicle is determined by the brake control unit;
- determining, by the brake control unit, a first slope value that is configured to determine when a traveling road slope of the vehicle is a ramp satisfying a predetermined slope value;
- determining, by the brake control unit, a braking pressure that is configured to determine when the braking pressure of the vehicle satisfies a predetermined braking pressure value;
- determining, by the brake control unit, a braking frequency that is configured to determine when the braking frequency of the vehicle is equal to a predetermined braking frequency value;
- and
- changing, by the brake control unit, a hydraulic supply line that supplies the first operating fluid to the first wheel brake and the fourth wheel brake while supplying the second operating fluid to the second wheel brake and the third wheel brake by setting the brake system to an H pipe mode, upon determining that the predetermined slope value, the predetermined braking pressure value, and the predetermined braking frequency value are all satisfied.
Dependencies are inferred from the claim text.