Electrohydraulic brake apparatus
AssigneeHyundai Mobis Co., Ltd.
InventorJong Sung Kim
Life of this patent
Estimating the term…
Abstract
An electrohydraulic brake apparatus includes: a reservoir; a stroke sensor; a plurality of wheel brake assemblies; a main master cylinder; an electric booster; an electronic stability control system; and an electronic control unit configured to control the ESC system so that a fluid pressure supplied to the ESC system brakes only part of the plurality of wheel brake assemblies when the pedaling amount is less than or equal to a first reference, and to control the ESC system so that the fluid pressure supplied to the ESC system brakes all of the plurality of wheels brake assemblies when the pedaling amount is greater than the first reference.
Claims9
An electrohydraulic brake apparatus comprising:
- a reservoir configured to store a brake fluid;
- a stroke sensor configured to sense a pedaling amount of a brake pedal;
- a plurality of wheel brake assemblies configured to provide braking forces to wheels;
- a main master cylinder configured to discharge the brake fluid introduced from the reservoir to a first main line;
- an electric booster configured to boost a pedal force of a driver;
- an electronic stability control (ESC) system configured to receive the brake fluid discharged from the main master cylinder through the first main line and open or close a plurality of inlet valves disposed therein to change a pressure of the brake fluid discharged from the main master cylinder;
- and
- an electronic control unit (ECU) configured to control the ESC system so that a fluid pressure supplied to the ESC system brakes only part of the plurality of wheel brake assemblies when the pedaling amount is less than or equal to a first reference, and to control the ESC system so that the fluid pressure supplied to the ESC system brakes all of the plurality of wheel brake assemblies when the pedaling amount is greater than the first reference,
- wherein the ECU controls the ESC system so that an increasing rate of a braking force applied to only the part of the plurality of wheel brake assemblies when the pedaling amount is less than or equal to the first reference is different from an increasing rate of a braking force applied to a remaining part of the plurality of wheel brake assemblies when the pedaling amount is greater than the first reference.
A method of controlling an electrohydraulic brake, comprising:
- sensing, by a stroke sensor, a pedaling amount of a brake pedal;
- generating, by an electronic control unit, a first braking signal when the pedaling amount is less than or equal to a first reference, and generating and transmitting, by the electronic control unit, a second brake signal to an electronic stability control (ESC) system when the pedaling amount is greater than the first reference;
- and
- opening or closing a plurality of inlet valves disposed in the ESC system in response to the first or second braking signal to change a pressure of a brake fluid discharged from a main master cylinder to brake a plurality of wheel brake assemblies,
- wherein the generating and transmitting a first braking signal and a second brake signal to an ESC system includes
- controlling the ESC system so that a fluid pressure supplied to the ESC system brakes only part of the plurality of wheel brake assemblies when the first braking signal is received, and controlling the ESC system so that the fluid pressure supplied to the ESC system brakes all of the plurality of wheel brake assemblies when the second braking signal is received, and
- wherein an increasing rate of a braking force applied to only the part of the plurality of wheel brake assemblies when the first braking signal is received is different from an increasing rate of a braking force applied to a remaining part of the plurality of wheel brake assemblies when the second braking signal is received.
Dependencies are inferred from the claim text.