Abstract: The present invention discloses a multi-channel impact-resistant intelligent-constant-deceleration hydraulic braking system, and relates to the field of safety braking control for mine hoist systems. A technical point of the braking system is that the braking system includes a braking circuit formed by a constant-deceleration hydraulic system, a constant-deceleration electrical closed-loop control system, and a detection and feedback apparatus. The constant-deceleration hydraulic system is provided with N+1 independent complete oil return channels, where N is a positive integer greater than or equal to 3. The oil return channels are disposed in parallel to form parallel independent braking circuits, that is, are “multi-channel” and do not have a “common output point”. The oil return channel includes a backup oil source, an electro-hydraulic signal conversion and amplification component, an operating mode switching apparatus, and an execution component that are sequentially connected.

Abstract: The present disclosure in at least one embodiment provides an electromechanical braking apparatus including a rod configured to translate in response to a depression of a brake pedal, a master cylinder configured to receive brake oil and to be responsive to insertion of the rod for discharging the brake oil, a motor, and a gear mechanism having at least some part connected to the master cylinder and at least some other part connected to the motor, wherein the gear mechanism including an upper housing configured to receive at least some portion of a plurality of gears, and a lower housing coupled to the upper housing and configured to receive at least some other portion of the plurality of gears.

Abstract: Disclosed is an electric brake system.

Abstract: An electric brake actuator provided with a main reservoir attached to a vehicle frame, a first reservoir attached to an input device and coupled to the main reservoir via a pipe, and a second reservoir coupled to the main reservoir via another pipe and directly mounted to a motor cylinder, wherein the second reservoir is disposed below the main reservoir in the vertical up and down direction.

Abstract: Disclosed herein are a pre-fill system to improve brake feel and a method of increasing an initial flux using the same which may reduce an invalid travel distance of a brake pedal. The pre-fill system includes a first housing connected with the master cylinder and provided with a first bore having a smaller-diameter portion and a larger-diameter portion, a second housing provided with a stepped second bore communicating with the first bore to be coupled with the first housing to define a hydraulic pressure chamber, a piston arranged in the first bore and provided with an oil channel unit, and a valve assembly adapted to open and close the oil channel unit of the piston according to the hydraulic brake pressure, wherein the piston applies pressure to the hydraulic pressure chamber through the piston to supply hydraulic pressure to the disc brake.

Abstract: A brake control system has a manual fluid pressure source and a power fluid pressure source. A fluid pressure actuator forms an X-pipe having a first channel and a second channel. The power fluid pressure source supplies the operating fluid to each wheel by using the first channel and the second channel. A channel system including the first channel and a channel system including the second channel can be isolated from each other by an isolation valve. The fluid pressure actuator includes a regulation unit configured to regulate a state of supplying the operating fluid such that a difference between a state occurring when the operating fluid is supplied to one of the first channel and the second channel after passing through the isolation valve, and a state occurring when the operating fluid is supplied to the other channel without passing through the isolation valve, is reduced.

Abstract: Systems and methods of overriding a conventional trailer emergency brake system to preclude and alert others as to inadvertent or premature movement of the trailer are described herein. One implementation includes a safety valve operatively positioned in the emergency braking system of a trailer that may be engaged to override the brake valve located in a tractor to prevent a truck driver from prematurely or inadvertently moving the trailer. In addition, the system may include a one way check valve to allow hydraulic fluid upstream of the safety valve to bleed out of the brake system when the safety valve is closed (to prevent movement of the trailer) before the emergency brakes for the trailer are set by the driver. A communication system may also be provided to alert the driver via a remotely located computing device that the emergency brakes for the trailer need to be set.

Abstract: A device and method to override a conventional trailer emergency brake system that may include a safety valve to override the brake valve located in a tractor. A preferred safety valve may be located in a sidewall of a trailer. In one position, a preferred safety valve may prevent compressed air from being transmitted to the trailer parking brakes so that a truck driver is unable to release the trailer brakes. In another position, a preferred safety valve may divert compressed air to one or more devices to alert a driver, a dock worker or others of an effort to release the trailer parking brakes. In another position, a preferred safety valve may permit compressed air to be transmitted so that a truck driver is able to release the trailer brakes.

Abstract: A control system for a vehicle (10) having an air braking system includes a supply line (13) for receiving a supply of compressed air for the air braking system. One or more brake members (19) are provided in fluid communication with the supply line (13) and controllable such that upon receipt of compressed air, the brake members (19) become disengaged to facilitate movement of the vehicle (10). Upon removal of the compressed air, the brake members (19) become engaged to prevent movement of the vehicle (10). An isolator device (20) is positionable within the supply line (13) upstream of the brake members (19) and is controllable to operate in a first state wherein the compressed air flows along a supply line (16) and a second state wherein the compressed air is prevented from flowing along the supply line (16) to the brake members (19).

Abstract: A brake fluid pressure retainer device for use in a vehicle incorporating a fluid pressure braking device includes an electromagnetic open-close valve disposed in a middle of a brake fluid passage between a brake pedal and a braking device provided for wheels, and a movable shutoff valve disposed in parallel with the electro-magnetic open-close valve for the brake fluid passage. The movable shutoff valve includes a movable valve body movable in a flowing direction of a brake fluid, a valve seat to be pressed by a front end to shut off the brake fluid, and a spring to apply force to the movable valve body in a direction in which the movable valve body moves away from the valve seat. A direction in which the movable valve body moves toward the valve seat is the flowing direction of the brake fluid.

Abstract: The invention relates to a hydraulic braking system having a device for controlling brake slip, drive slip, and/or the driving stability of a vehicle. Among other things, such devices use pumps, valves, and reservoirs to control brake pressure in the wheel brakes in accordance with wheel slip occurring at the particular wheels. These components are in contact with each via a hydraulic circuit. The hydraulic circuit is built into a hydraulic block that has spaces for installing the components and channels for hydraulic contact. The invention makes possible a particularly compact and reduced-weight design of the hydraulic block and at the same time low manufacturing costs. For this purpose an advantageous layout and sealing of channels relative to each other and to the surrounding area is provided.

Abstract: In an active brake pads retraction system, the improvement is a metering check valve which limits the retraction. The metering check valve is interfaced with an anti-lock brake system (ABS), disposed in the hydraulic brake line between the brakes apply system of the ABS and a caliper member of the ABS located at each brake corner. Brake pads are retracted with respect to the brake rotor responsive to predetermined conditions of the motor vehicle in which braking is not required, wherein a retraction volume within the metering check valve limits the amount of brake pads retraction.

Abstract: In an active brake pads retraction system, the improvement is a metering check valve which limits the retraction. The metering check valve is interfaced with an anti-lock brake system (ABS), disposed in the hydraulic brake line between the brakes apply system of the ABS and a caliper member of the ABS located at each brake corner. Brake pads are retracted with respect to the brake rotor responsive to predetermined conditions of the motor vehicle in which braking is not required, wherein a retraction volume within the metering check valve limits the amount of brake pads retraction.

Abstract: A braking system for a combined tractor-trailer assembly wherein a leading trailer is coupled to a towing tractor and a trailing trailer is coupled to the leading trailer. All of the wheels of the trailers are provided with brakes which may be applied and released in response to the operation of a brake control pedal operated by a driver in the tractor. The brakes also may be applied to the trailing trailer whenever the latter is parked. The brakes of the trailing trailer normally are maintained in applied condition by a spring assisted mechanism when such trailer is parked. Such mechanism normally is disabled by pressurized fluid when the trailer is in service and the pressured fluid is accessible via a valve which simultaneously enables the parking brakes and service brakes simultaneously to be coupled to and uncoupled from the pressure fluid system.

Abstract: A method for controlling a vehicle wheel brake that includes applying a pulse width modulated voltage to an isolation valve located between a master brake cylinder and the wheel brake to develop a differential pressure across the isolation valve that is applied to the wheel brake. The differential pressure is a function of the duty cycle of the applied voltage. Because the operation of the isolation valve allows a flow of fluid through the valve, changes in the master cylinder pressure are passed through the isolation valve to the wheel brake.

Abstract: An electro-hydraulic brake system containing four isolation piston assemblies each of which is comprised of a cylinder, a piston, and a pair of hydraulic lines. The cylinder has only two apertures, and the piston is disposed in the cylinder. The first hydraulic line communicates between a wheel brake and a first side of the piston through one of the apertures. The second hydraulic line communicates between an accumulator and a second side of the piston through the other of the apertures. The system components are arranged in a compact, easy to manufacture package.

Abstract: A hydraulic balanced braking system, comprising two oil pressure cylinders, two hydraulic brakes, and an oil-pressure balance unit. The two oil pressure cylinders are mounted close to braking handles. The oil-pressure balance unit is inserted between the two oil pressure cylinders and the two hydraulic brakes and further comprises two parallelly oriented oil cylinders, two primary pistons, two secondary pistons, and a connecting plate. Two inlets at upper sides of the two oil cylinders are connected with the two oil pressure cylinders, respectively, transmitting oil pressure from the two oil pressure cylinders to the two primary pistons. The two secondary pistons are mounted below and driven downward by the two primary pistons, respectively, thus generating oil pressure and via two outlets driving a braking movement of the two hydraulic brakes.

Abstract: A vehicular brake system includes a hydraulic master cylinder connected to wheel brakes via brake conduits. A pump generates fluid pressures and pressure control valves located between the master cylinder and the wheel brakes regulate the fluid pressures at the wheel brakes to achieve anti-lock and traction control functions. A medium pressure accumulator stores fluid pressurized by the pump that is supplied to the wheel brakes via associated control valves to achieve a vehicle stability control braking function. An evacuation valve is provided in the conduit in which the medium pressure accumulator is provided. The evacuation valve permits evacuation and fill of an otherwise isolated conduit without increasing cycle times or complexity of procedures during installation of the system. Additionally, the evacuation valve can be used during service of the brake system if desired.

Abstract: An electronic control unit for a vehicle which receives a sensor signal as an input signal and provides an output signal for controlling operation of the vehicle. The electronic control unit comprising: a microcomputer having a first operating portion and a second operating portion both receiving the input signal commonly, and a self check portion which compares operation result of the first operating portion and the second operating portion and outputs a signal indicating abnormal condition when the operation result do not coincide with each other or when the first operating portion outputs abnormal output signal for a time equal to or longer than a predetermined time. The electronic control unit also comprises a safety control means which switches an output signal thereof from an output signal of the microcomputer to a safe side signal when the signal indicating abnormal condition from the self check portion continues for a time equal to or longer than a predetermined time.

Abstract: An improved electro-hydraulic brake system having features for improving the pedal feel of the system, while further having design features which contribute to the economy of manufacture of certain components of the system. The system provides for an electrically powered normal source of pressurized hydraulic brake fluid, and a manually powered backup source of pressurized hydraulic brake fluid to the vehicle brakes in the event of failure of the normal source. During normal braking, fluid from the backup source is redirected from the vehicle brakes to a pedal simulator. The pedal simulator preferably includes arrangements of spring loaded pistons, expansion volumes, and damping orifices, together with valves selectively controlling the flow of fluid to and from the pedal simulator which provides for an improved pedal feel during vehicle braking.