The present disclosure relates to an electronic brake system and an operation method thereof. The electronic brake system includes a reservoir in which a pressurized medium is stored, an integrated master cylinder including a simulation piston, a master piston, and an elastic member provided between the simulation piston and the master piston, a reservoir flow path to connect the integrated master cylinder and the reservoir, a hydraulic pressure supply device configured to generate a hydraulic pressure by operating a hydraulic piston according to an electrical signal output in response to a displacement of a brake pedal, a hydraulic control unit including a first hydraulic circuit having two wheel cylinders and a second hydraulic circuit having the other two wheel cylinders and configured to control the hydraulic pressure transferred to the first hydraulic circuit and the second hydraulic circuit, and an electronic control unit configured to control valves based on hydraulic pressure information and displacement information of the brake pedal.

The present disclosure relates to an electronic brake system and an operation method thereof. The electronic brake system includes a reservoir in which a pressurized medium is stored, an integrated master cylinder including a simulation piston, a master piston, and an elastic member provided between the simulation piston and the master piston, a reservoir flow path to connect the integrated master cylinder and the reservoir, a hydraulic pressure supply device configured to generate a hydraulic pressure by operating a hydraulic piston according to an electrical signal output in response to a displacement of a brake pedal, a hydraulic control unit including a first hydraulic circuit having two wheel cylinders and a second hydraulic circuit having the other two wheel cylinders and configured to control the hydraulic pressure transferred to the first hydraulic circuit and the second hydraulic circuit, and an electronic control unit configured to control valves based on hydraulic pressure information and displacement information of the brake pedal.

An air supply control arrangement for a heavy-duty vehicle comprising a lift axle includes a brake chamber. An electronically controlled brake valve device allows pressurized air to be passed to the brake chamber of the lift axle. A pressurized air source supplies pressurized air to the electronically controlled brake valve device along a supply passage. A pilot control valve provided between the pressurized air source and the electronically controlled brake valve device can restrict air flow through the supply passage. A pressure-responsive element actuates the pilot control valve when the pressure in the lift bellow is increased so that the lift axle is raised to a lift condition. The pressure-responsive element closes the pilot control valve. When the pressure in the lift bellow is reduced so that the lift axle is lowered to a ride condition then the pressure-responsive element is deactivated to allow opening of the pilot control valve.

Venturi devices are disclosed that have a housing defining a conduit having a Venturi gap. Downstream of and bypassing the Venturi gap is a bypass check valve that defines an internal cavity having a first seat, a second seat, an inlet port, at least two outlet ports, and a seal member seated therein that is translatable between a closed position against the first seat and an open position against the second seat. The two outlet ports of the bypass check valve enter the conduit at opposing positions disposed a distance from a top of the conduit, which is located at a midsagittal plane of the housing. Further, a transition from a tapering section downstream of the Venturi gap and upstream of each of the two outlet ports to a discharge section downstream of the two outlet ports forms a gradually, continuously tapering interior surface of the conduit.

A hydraulic braking system includes a base, which has an oil chamber and a connecting hole communicating with each other, a seat, which is provided in the oil chamber and has a receiving space communicating with the oil chamber and the connecting hole, a check valve movably provided in the receiving space and the connecting hole, and an elastic member. When one end of a connecting pipe which is connected to a brake actuator is inserted into the connecting hole to engage the base, the check valve is pushed inward to inject the hydraulic fluid in the oil chamber into the connecting pipe; when the connecting pipe is detached from the base, the check valve is pushed by the elastic member, and therefore returns to the original position. Whereby, the hydraulic fluid is prevented from leaking out.

A plug system is provided. The plug system may comprise an adapter having an annular body oriented about an axis, a passage defined by the annular body, and a retention feature protruding radially from the annular body. The retention feature may be configured to obstruct the passage. A threaded surface may at least partially define an outer diameter of the annular body. A fuse plug may be configured for insertion into the passage, and the retention feature may be configured to at least partially retain the fuse plug.

A hydraulic unit for a slip controller of a hydraulic vehicle brake system includes an electric motor, a plurality of hydraulic pumps, a hydraulic block, a plurality of solenoid valves, a rotation angle sensor, an electronic control unit, and a valve cover. The electric motor is positioned on a narrow side of the hydraulic block, and is configured to drive the hydraulic pumps. The electronic control unit includes a contacting mechanism, and is positioned in the valve cover. The electric motor and the solenoid valves are arranged so that the electric motor and electromagnets of the solenoid valves protrude to approximately a same extent from the hydraulic block to enable simple commutation with the rotation angle sensor and the contacting mechanism of the electronic control unit.

A hydraulic unit for a slip controller of a hydraulic vehicle brake system includes an electric motor, a plurality of hydraulic pumps, a hydraulic block, a plurality of solenoid valves, a rotation angle sensor, an electronic control unit, and a valve cover. The electric motor is positioned on a narrow side of the hydraulic block, and is configured to drive the hydraulic pumps. The electronic control unit includes a contacting mechanism, and is positioned in the valve cover. The electric motor and the solenoid valves are arranged so that the electric motor and electromagnets of the solenoid valves protrude to approximately a same extent from the hydraulic block to enable simple commutation with the rotation angle sensor and the contacting mechanism of the electronic control unit.

A ventilation or check valve for ventilation or outlet openings of compressed air apparatuses of vehicles, includes at least one diaphragm disk which is made from flexible material, is held with a central region in a bore of a valve housing and is prestressed with a radially outer region against a valve seat on the valve housing, to lift up from the valve seat in a pressure-induced manner in the case of a pressure gradient between an inlet space and an outlet space or atmosphere and to open a flow cross section between the inlet space and the outlet space or atmosphere, in which, as viewed in the circumferential direction of the diaphragm disk, a plurality of hold-downs which are arranged at a circumferential spacing from one another and hold down the radially outer region of the diaphragm disk locally against the valve seat are provided on the valve housing.

A ventilation or check valve for ventilation or outlet openings of compressed air apparatuses of vehicles, includes at least one diaphragm disk which is made from flexible material, is held with a central region in a bore of a valve housing and is prestressed with a radially outer region against a valve seat on the valve housing, to lift up from the valve seat in a pressure-induced manner in the case of a pressure gradient between an inlet space and an outlet space or atmosphere and to open a flow cross section between the inlet space and the outlet space or atmosphere, in which, as viewed in the circumferential direction of the diaphragm disk, a plurality of hold-downs which are arranged at a circumferential spacing from one another and hold down the radially outer region of the diaphragm disk locally against the valve seat are provided on the valve housing.