This disclosure describes a brake-fluid conduit for conducting a brake fluid between a fluid pressure supply device and a wheel cylinder of a hydraulic disk brake system. The brake-fluid conduit comprises a tapered portion having a cross-section that is largest at an end of the tapered portion facing the wheel cylinder and that narrows towards an end of the tapered portion facing away from the wheel cylinder.

This disclosure describes a brake-fluid conduit for conducting a brake fluid between a fluid pressure supply device and a wheel cylinder of a hydraulic disk brake system. The brake-fluid conduit comprises a tapered portion having a cross-section that is largest at an end of the tapered portion facing the wheel cylinder and that narrows towards an end of the tapered portion facing away from the wheel cylinder.

A master cylinder for a brake. The master cylinder includes a cylinder main body having a hydraulic pressure chamber, a reservoir tank having a storage chamber, and a separator that is provided in the reservoir tank to divide a space in the storage chamber of the reservoir tank into an upper region and a lower region. A hydraulic fluid is storable in the hydraulic pressure chamber, and is storable in the storage chamber for thereby replenishing the hydraulic pressure chamber. The hydraulic fluid is circulatable between the upper region and the lower region, such that a liquid surface of the hydraulic fluid is in the upper region. The separator has a lower surface in the lower region. The lower surface has an inner portion, and an inclined portion that surrounds the inner portion and that is inclined outwardly and upwardly with respect to the inner portion.

A master cylinder for a brake. The master cylinder includes a cylinder main body having a hydraulic pressure chamber, a reservoir tank having a storage chamber, and a separator that is provided in the reservoir tank to divide a space in the storage chamber of the reservoir tank into an upper region and a lower region. A hydraulic fluid is storable in the hydraulic pressure chamber, and is storable in the storage chamber for thereby replenishing the hydraulic pressure chamber. The hydraulic fluid is circulatable between the upper region and the lower region, such that a liquid surface of the hydraulic fluid is in the upper region. The separator has a lower surface in the lower region. The lower surface has an inner portion, and an inclined portion that surrounds the inner portion and that is inclined outwardly and upwardly with respect to the inner portion.

Disclosed herein an electronic brake system includes a hydraulic pressure supply device including a first pressure chamber and a second pressure chamber partitioned by a hydraulic piston, and a hydraulic control unit, wherein the hydraulic control unit comprises a first hydraulic flow path connecting the first pressure chamber and one of the first and second hydraulic circuits, a second hydraulic flow path branched from the first hydraulic flow path to connect to the other one of the first and second hydraulic circuits, a third hydraulic flow path branched from the first hydraulic flow path on upstream side of a branch point of the second hydraulic flow path to connect the second pressure chamber, and a fourth hydraulic flow path branched from the first hydraulic flow path on upstream side of a branch point of the third hydraulic flow path to connect the third hydraulic flow path.

Disclosed herein an electronic brake system includes a hydraulic pressure supply device including a first pressure chamber and a second pressure chamber partitioned by a hydraulic piston, and a hydraulic control unit, wherein the hydraulic control unit comprises a first hydraulic flow path connecting the first pressure chamber and one of the first and second hydraulic circuits, a second hydraulic flow path branched from the first hydraulic flow path to connect to the other one of the first and second hydraulic circuits, a third hydraulic flow path branched from the first hydraulic flow path on upstream side of a branch point of the second hydraulic flow path to connect the second pressure chamber, and a fourth hydraulic flow path branched from the first hydraulic flow path on upstream side of a branch point of the third hydraulic flow path to connect the third hydraulic flow path.

A solenoid valve for a brake system to control a flow rate of a flow path connecting a first port with a second port includes: an armature disposed inside a sleeve and configured to vertically move in an axial direction together with a plunger to open or close an orifice of a seat; an elastic member providing an elastic force to the armature; a magnetic core configured to accommodate the seat therein and provide a driving force in a direction opposite to the elastic member; an outer filter coupled to a lower side of the seat; an inlet filter coupled to a lower side of the outlet filter; and a lip seal interposed between the outlet filter and the inlet filter and including an inclined protrusion to allow a unidirectional flow of a fluid, wherein the solenoid valve has a flow path opened or closed by vertical movement of the armature and a unidirectional flow path via the lip seal.

Disclosed is a brake hose layout setting system that includes: a testing part provided to test the layout of the brake hose while brake hose fixing parts, which are manufactured using a 3D printer, are mounted; a scanning part provided to scan the layout of the brake hose and to obtain layout data during the layout test of the brake hose; and a controller for comparing the layout data of the brake hose obtained from the scanning part with surrounding part data to determine whether or not interference occurs and for correcting data on interfering parts to then provide the same to the 3D printer, wherein the testing part includes the brake hose fixing parts and first and second fitting members coupled to both ends of the brake hose, respectively, and wherein the first and second fitting members have the same structure. Various embodiments may be possible.

An automatic single-car test device for a distributor valve of a railway vehicle includes an air supply source, an adapter having a working chamber fitting, a valve chamber fitting, a reservoir fitting, a brake cylinder fitting, and a brake pipe fitting, an operating portion in fluid communication with the air supply source and the adapter, where the operating portion is configured to measure pressure within the working chamber fitting, the valve chamber fitting, the reservoir fitting, the brake cylinder fitting, and the brake pipe fitting and generate an electrical signal representing the respective pressure with the fittings. The test device further including a processing portion having a microprocessor, an input/output device, and a power supply. The processing portion configured to manipulate pressure within the working chamber passage, the valve chamber passage, the reservoir passage, the brake cylinder passage, and the brake pipe passage of the distributor valve via the adapter.

An automatic single-car test device for a distributor valve of a railway vehicle includes an air supply source, an adapter having a working chamber fitting, a valve chamber fitting, a reservoir fitting, a brake cylinder fitting, and a brake pipe fitting, an operating portion in fluid communication with the air supply source and the adapter, where the operating portion is configured to measure pressure within the working chamber fitting, the valve chamber fitting, the reservoir fitting, the brake cylinder fitting, and the brake pipe fitting and generate an electrical signal representing the respective pressure with the fittings. The test device further including a processing portion having a microprocessor, an input/output device, and a power supply. The processing portion configured to manipulate pressure within the working chamber passage, the valve chamber passage, the reservoir passage, the brake cylinder passage, and the brake pipe passage of the distributor valve via the adapter.