Secondary brake for commercial vehicle using MR fluid
AssigneeHyundai Motor Company
InventorJong Yun Jeong
Life of this patent
Estimating the term…
Abstract
A secondary brake for commercial vehicles using Magnetorheological (MR) fluid may include a rotor coupled to a transmission output shaft to be rotated together, a stator configured to be disposed between the rotor and a body of a transmission and having a cavity into which the MR fluid is filled and a portion of the rotor is received, and a stator coil provided in a portion of the stator and applying a magnetic field to the MR fluid so that braking torque is generated due to a shear resistance characteristic of the MR fluid.
Claims4
A secondary brake for commercial vehicles using Magnetorheological (MR) fluid comprising:
- a rotor coupled to a transmission output shaft to be rotated together;
- a stator configured to be disposed between the rotor and a body of a transmission and having a cavity formed in the stator, wherein a portion of the rotor is received in the cavity;
- a stator coil provided in a portion of the stator and applying a magnetic field to the MR fluid so that braking torque is generated due to a shear resistance characteristic of the MR fluid;
- a circumferential hole formed in the cavity of the stator in a circumferential direction to receive the MR fluid inside of the circumferential hole;
- through holes formed in the portion of the rotor to receive the MR fluid inside the through holes;
- and
- flow holes formed in the portion of the rotor received in the cavity to provide a passage allowing the MR fluid in the through holes to flow into the circumferential hole,
- wherein the MR fluid circulates via the through holes of the rotor, the flow holes of the rotor, and the circumferential hole of the stator.
A secondary brake for commercial vehicles using Magnetorheological (MR) fluid comprising:
- a rotor coupled to a transmission output shaft to be rotated together;
- a stator configured to be disposed between the rotor and a body of a transmission and having a cavity formed in the stator, wherein the MR fluid is filled in the cavity and a portion of the rotor is received in the cavity;
- a stator coil provided in a portion of the stator and applying a magnetic field to the MR fluid so that braking torque is generated due to a shear resistance characteristic of the MR fluid;
- a coil controller connected to the stator coil and configured to control magnetic force of the stator coil by increasing electric power in steps;
- and
- a fluid supply which is interlocked with the coil controller and supplies MR fluid to the cavity,
- wherein the rotor formed in the cavity of the stator having through holes and flow holes,
- wherein a magnitude of the shear resistance of the MR fluid is configured to be adjusted by regulating amount of the MR fluid depending on pushed angles of a brake pedal manipulated by a driver or a number of operations of actuating switches, and
- wherein the MR fluid circulates via the through holes of the rotor, the flow holes of the rotor, and the circumferential hole of the stator.
Dependencies are inferred from the claim text.