Abstract: Disclosed herein is an electronic brake system.

Abstract: An electro-pneumatic brake control device is provided for controlling the parking brake of a vehicle having compressed-air-actuated brake cylinders, at least one of which is a spring brake cylinder with a spring store part. Valve devices place the brake control device into various operating states. In a first operating state, the valve devices are at least partially supplied with current and switched such that a compressed air line to the spring store part of the spring brake cylinder is aerated. In a second state, the valve devices are at least partially supplied with current and switched such that the compressed air line is deaerated. In a third state, which can be activated in the event of failure of the electrical energy supply of the brake control device, the valve devices are switched to a currentless state such that the compressed air line is automatically deaerated in throttled manner.

Abstract: A first stroke sensor and a second stroke sensor in a braking control device detect the pedal depression amount. A brake ECU calculates a target wheel cylinder pressure by utilizing the detected pedal depression amount, and increases/decreases the wheel cylinder pressure by controlling the hydraulic actuator so as to achieve the calculated target wheel cylinder pressure. The brake ECU determines whether the brake pedal has been sharply depressed, by utilizing the pedal depression amount detected within a range thereof that is smaller than the pedal depression amount. If it is determined that the brake pedal has been sharply depressed, the brake ECU relaxes the restriction on the hydraulic pressure gradient at the time of increasing the wheel cylinder which is imposed when the brake pedal has not been sharply depressed.

Abstract: A brake control device is provided, which is capable of providing a precise diagnosis on a trouble on a hydraulic pressure valve etc., so as to provide an appropriate output hydraulic pressure corresponding to a stroke amount of a brake pedal. In this device, an electromagnetic valve is provided on a hydraulic pressure passage allowing an auxiliary hydraulic pressure chamber to communicate with an accumulator, and is controlled to open when such a trouble occurs that output hydraulic pressure from the hydraulic pressure valve becomes lower than a predetermined range; and an electromagnetic valve is also provided on a hydraulic pressure passage allowing the auxiliary hydraulic pressure chamber to communicate with a reservoir, and is controlled to open when such a trouble occurs that the output hydraulic pressure from the hydraulic pressure valve becomes insufficiently reduced.

Abstract: Systems and methods to prevent dragging of a fluid pressure type disk brake system are described herein. Brake fluid pressure generated by a master cylinder during a braking operation is transmitted to a wheel cylinder via a VSA system. The VSA system includes a low pressure accumulator and an out-valve disposed between the wheel cylinder and the low pressure accumulator. Temporarily opening the out-valve during a braking operation allows part of the brake fluid that would otherwise be supplied to the wheel cylinder to be supplied to the low pressure accumulator. After the braking operation by the driver is completed, brake fluid supplied to the wheel cylinder is returned to the master cylinder. Thus, a piston of the wheel cylinder is withdrawn by an extra amount corresponding to the amount of brake fluid supplied to the low pressure accumulator, thus reliably prevents disk pad dragging in the disk brake system.

Abstract: A hydraulic brake system including: (a) a first hydraulic-pressure generating device including a manual hydraulic pressure source; (b) a second hydraulic-pressure generating device including a power hydraulic pressure source; (c) a manual-operation-associated brake line including a communicating device that is to be brought into communication with the manual hydraulic pressure source and brake cylinder or cylinders of the plurality of hydraulic brakes; (d) an output hydraulic-pressure control device and a flow restraining device disposed in parallel with each other between the manual-operation-associated brake line and the second hydraulic-pressure generating device; and (e) a power hydraulic pressure source control device for activating the power hydraulic pressure source such that the hydraulic pressure is supplied to the manual-operation-associated brake line via the flow restraining device, when the output hydraulic-pressure control device cannot control the hydraulic pressure outputted by the second hydr

Abstract: A method and a device for detecting the initiation of a starting process of a motorcycle are disclosed. The method includes the step of acquiring a throttle valve angle (?), an engine speed (nengine) or both the throttle valve angle (?) and the engine speed (nengine). The method further includes the step of analyzing the throttle valve angle (?), the engine speed (nengine) or both the throttle valve angle (?) and the engine speed (nengine) to detect the initiation of the starting process of the motorcycle. The device includes both a means for acquiring and a means for analyzing the throttle valve angle (?), the engine speed (nengine) or both the throttle valve angle (?) and the engine speed (nengine).

Abstract: In a brake controlling device (20), a separating valve (60) is provided in a main flow path (45) for interconnecting a first liquid pressure circuit and a second liquid pressure circuit. When an abnormality detecting section detects an abnormality relating to brake fluid pressure, a controlling section sets the separating valve (60) to a closed state. A leakage suppressing section performs leakage suppressing processing for suppressing entry of a brake fluid, which is in the first liquid pressure circuit, into the second liquid pressure circuit after the separating valve (60) is set to the closed state. A leakage suppressing section sets a master cut valve (64) to a closed state to perform the leakage suppressing processing.

Abstract: A fluid level detecting apparatus detects the level of fluid in a reservoir. When the fluid level detecting apparatus detects that the fluid level has reached a minimum fluid level, an ECU issues a warning. If, after the warning has been issued, the fluid level detecting apparatus detects that the fluid level has reached a failsafe mode operation fluid level, which is lower than the minimum fluid level, the switches a normal control mode to a failsafe mode, and performs brake control using the failsafe mode.

Abstract: A hybrid brake apparatus for a vehicle includes a front hydraulically actuated brake circuit, a rear electrically actuated brake circuit, and a controller. The front hydraulically actuated brake circuit includes a master cylinder for providing pressurized fluid to the front brake circuit in response to an input applied to the master cylinder for applying a frictional front braking force. The rear electrically actuated brake circuit is controllable in response to the input for providing a frictional rear braking force. The rear brake circuit is controlled in accordance with a first predetermined relationship between the input and rear braking force during normal operation of the front brake circuit. If the controller detects a degradation of front braking force, the rear brake circuit is controlled in accordance with a second predetermined relationship between the input and the rear braking force, to thereby compensate for the degradation of front braking force.

Abstract: What is disclosed is a brake system for a mobile machine, e.g., for a wheel loader, comprising two hydraulic circuits to each of which at least one respective wheel brake cylinder is associated. Control of the wheel brake cylinders is effected through a brake valve arrangement which, in accordance with the invention, is formed by two brake valves each realized with a hydraulic pilot control, wherein the braking pressure at the one brake valve is reported via a control line into a pilot control chamber of the other brake valve.

Abstract: A motorcycle brake system enables a smooth switching to a hydraulic loss simulator to provide an improved feeling of braking operation. A brake operating unit includes a brake caliper, an electromagnetic on-off valve (V1) which blocks a main brake passage, a pressure sensor, a hydraulic modulator, and a hydraulic loss simulator. The brake system allocates a braking force to front and rear wheels by controlling the hydraulic modulator based on a result of detection by the pressure sensor. The brake operating unit has a brake light switch for detecting the starting of operation thereof, actuates an electromagnetic on-off valve (V1) to block the main brake passage based on a result of detection by the brake light switch, and unblocks the main brake passage when a predetermined amount of time elapses without any input made to the pressure sensor in a standby state with the main brake passage blocked.

Abstract: An electric brake system for an aircraft as described herein electrically actuates brake mechanisms in a seamless manner when a power interrupt condition is experienced. While operating in an autobraking mode and in response to a power interrupt condition, the electric brake system preserves the last brake actuation command generated by the autobrake function. After normal operating power is reestablished, the last brake actuation command is retrieved and processed by the electric brake system. While operating in a pedal braking mode and in response to a power interrupt condition, the electric brake system discards the last brake actuation command generated from brake pedal interaction. After normal operating power is reestablished, the brake pedal data is refreshed to generate a new brake actuation command. These procedures reduce lurching and unexpected brake actuation levels following a power interrupt in the electric brake system.

Abstract: In a system and method for controlling a distributed power rail vehicle consist, each of at least one powered rail vehicle in the rail vehicle consist is designated for operation as a remote trail. Based on the designation, a respective brake pipe valve of each of the at least one powered rail vehicle is automatically operated to a cut-out mode. Upon initiation of a service, an emergency, and/or a penalty brake application in the rail vehicle consist, the respective brake pipe valve of each of the at least one the powered rail vehicle is automatically operated to a cut-in mode. Upon completion of the service, emergency, and/or penalty brake application in the rail vehicle consist, the respective brake pipe valve of each of the at least one powered rail vehicle is automatically operated back to the cut-out mode.

Abstract: Apparatus for controlling a pneumatic brake system that includes an electronic control device to limit the maximum brake effort even when an external electrical power supply to the braking system is not present.

Abstract: A hydraulic motorcycle brake system whose brake circuits are provided with a valve circuit which prevents the pressure which can be generated by the pump from reacting on the manually activated or foot-activated master brake cylinder.

Abstract: Method and apparatus for activation of an emergency brake function (8; 8?) within a vehicle (1) when a first brake circuit and a second brake circuit are out of order. A first sensor (20; 20?) is included for detecting whether the pressure (p1) in the first brake circuit falls below a first limit value (p1G). A second sensor is included (21; 21?) for detecting whether the pressure (p2) in the second brake circuit falls below a second limit value (p2G). A valve arrangement is provided (16; 24, 25, 26) for activating the emergency brake function if the pressure (p1) in the first brake circuit falls below the first limit value (p1G) at the same time as the pressure (p2) in the second brake circuit falls below the second limit value (p2G).

Abstract: A hydraulic braking system including first and second braking circuits. The first and second braking circuits each include a wheel brake, a pressurized fluid source, and a hydraulic conduit connecting the wheel brake to the fluid source. Each of the hydraulic conduits includes a control valve that operates to selectively prevent fluid flow from the pressurized fluid source to the wheel brake. A connecting conduit connects the first and second braking circuits. A floating piston is disposed within the connecting conduit and is adapted to be displaced by the pressurized fluid provided by the pressurized fluid source in the first braking circuit when the control valve of the first braking circuit is closed. The displacement of the piston generates an additional volume of pressurized fluid in the hydraulic conduit of the second braking circuit that effectively augments the pressurized fluid provided by the second pressurized fluid source.

Abstract: A valve assembly for an air pressure system includes an inlet valve, a first control valve, and a second control valve. The inlet valve includes an inlet port, an outlet port and a control port. The inlet valve inlet port communicates with the inlet valve outlet port when the inlet valve control port is above a threshold pressure. The first control valve includes an inlet port, an outlet port, an exhaust port, and a control member. The first control valve inlet port communicates with the inlet valve outlet port. The first control valve outlet port communicates with one of the first control valve inlet port and the first control valve exhaust port as a function of a position of the first control valve control member. The second control valve includes an inlet port, an outlet port, an exhaust port, and a control member. The second control valve inlet port communicates with the inlet valve outlet port.

Abstract: An electronic brake system for a tractor-trailer vehicle includes a front electronic brake system for braking a front axle assembly and a rear electronic brake system for braking a rear axle assembly. During normal vehicle operation, front and rear air reservoirs supply air to actuate front and rear brake actuators, respectively. In response to a failure of the front electronic brake system, an electronic control unit automatically activates a trailer control valve to supply air to actuate the front brake actuator in addition to actuating the rear brake actuator from the rear air reservoir. The trailer control valve receives air supply from an independent reservoir.

Abstract: A method and apparatus control target deceleration of a vehicle in response to a master cylinder pressure and the like. A controlled braking mode in which the pressure in each wheel cylinder is controlled based on the target deceleration, and a driver braking mode in which the pressure in each wheel cylinder is directly controlled by a master cylinder. When an abnormality in the braking control is detected, the ratio of the wheel braking force to the amount of driver's braking operation is gradually adjusted closer to the ratio set for the driver braking mode.

Abstract: A braking system for a construction machine includes service brakes operated by service valves to which pressure fluid is supplied by a safety valve which affords protection against unintentional application of the service brakes upon failure or malfunction of a braking system component.

Abstract: A braking system for a construction machine includes service brakes operated by service valves to which pressure fluid is supplied by a safety valve which affords protection against unintentional application of the service brakes upon failure or malfunction of a braking system component.

Abstract: By allowing for the possibility that light-weight spare wheels or spare wheels are mounted, the invention demonstrates possible ways for replacing the output signals of one or more defective wheel speed sensors.

Abstract: An electric control apparatus of a brake is provided with a second reservoir, in which a brake fluid is stored in advance, separately from a control device of a brake hydraulic pressure. The second reservoir communicates with a pump, which is an original component of the control device, on the side of a suction opening of the pump through a second liquid passage equipped with a first on-off valve. A first liquid passage is equipped with a second on-off valve. The pump is operated with the first on-off valve being opened to supply a brake hydraulic pressure corresponding to the quantity of an operation of a brake pedal in a sate in which the second on-off valve is closed to a wheel cylinder as an electric control mode of a brake hydraulic pressure of an electronic control unit.

Abstract: An electromechanical braking system utilizes redundancy features to provide safe and reliable braking. The braking system is configured to operate on power provided by multiple power sources. Different modes of braking are available based on whether a failure has occurred in one or more power sources. Additionally, system redundancy allows for failure in one or more primary components without total loss of braking capacity. Proportional braking is provided even in an emergency braking mode.

Abstract: A braking force control valve for an air brake system. The air brake system includes an air compressor for generating compressed air, an air tank for storing the compressed air supplied from the air compressor, an air bellows connected to the air tank, a load sensing valve connected to the air bellows to equilibrate braking force applied to front and rear wheels of the vehicle, a brake valve for operating the load sensing valve, a brake chamber for supplying braking force by receiving the compressed air from the air tank when the brake valve is operated. The braking force control valve comprises a valve body provided with a first port connected to the air tank, a second port connected to the air bellows, a third port connected to the load sensing valve, and a valve mechanism for selectively connecting the third port to either the first port or the second port according to a height variation between a body and an axle shaft of the vehicle.

Abstract: A motor vehicle having an electronically controlled automatic transmission, which comprises a parking position, and a power parking brake. The parking position and the power parking brake are operable independently of one another. A redundant system is provided in that a device checks the parking position as well as the power parking brake with respect to its optional functioning and, in the event of an operating failure of one system, operates the respective other system to take over the function of the failed system.

Abstract: An improved the velocity fuse valve controls communication between first and second brake valves and first and second brake lines. The velocity fuse valve includes a valve housing having a valve bore which slidably receives a valve spool. The spool moves in response to pressure in first and second pilot chambers, each communicated with a corresponding first and second outlet. The first pilot chamber is communicated with the first outlet via a first dashpot passage and a first orifice, and the second pilot chamber is communicated with the second outlet via a second dashpot passage and a second orifice. The orifices reduce or control how fast the spool will move in response to the pressure differential between the pilot chambers.

Abstract: An invention relates to an electrically controlled braking system which is intended for use on a wheeled vehicle and has input means which can be actuated by a driver of the vehicle in accordance with the desired braking effect, two electronic control units, which operate independently of each other and each of which can be supplied with an electrical signal corresponding to the extent of actuation of the input means, which can be recorded by a sensor, a brake cylinder assigned to a wheel and a braking pressure modulator valve which is fluid-connected to the brake cylinder and has a first electric actuating element, which can be activated by a first of the two control units. To make the braking system very safe, the braking pressure modulator valve has a second electric actuating element which acts in the same direction when activated, as the first electric actuating element.

Abstract: A method of electronic brake force distribution is applied to contribute to vehicle stability even in the event of failure of the system that detects failure of the front-axle brake circuit (13) in a vehicle (1). The method involves initiating a pressure maintenance or pressure reduction phase only after the standards with respect to a minimum vehicle deceleration upon brake circuit failure are met. This way, it is ensured that the standards are observed, on the one hand, and locking of the rear wheels (6,7) before the front wheels (4,5) is prevented with great likelihood, on the other hand. Thus, electronic brake force distribution (EBD) is switched over to less sensitive criteria. This makes allowance for both possibilities in the event of a failure of a pressure switch (15), i.e., that the front-axle brake circuit (13) is intact or that it is defective.