Abstract: A testing device for conducting the Initial Terminal Inspection of the air brake system of a made-up train includes a first valve assembly for at least charging and applying the brakes through the test device operable from the location at which the device is coupled between the train brake pipe and a supply of compressed air, and it also includes a second valve assembly for releasing the brakes actuated by receipt of a remotely-transmitted signal. The Initial Terminal Inspection requires that the brakes of a train be inspected in both their applied and their released positions. A testing device is normally connected to the train brake pipe at the locomotive end. The inspection of the brakes in their applied position requires the inspector to walk the length of the train, usually from the locomotive end to the far end of the train. This can be a distance of a half mile or a mile or more.

Abstract: The method includes reducing pressure of a charged brake pipe to a predetermined pressure value. The brake pipe is then charged only from the head end unit. Each intermediate brake pipe monitoring and charging device sequentially reports on the network a pressure which is an increase if the brake pipe is continuous between it and the head end unit. Subsequent to receipt of a report of an increased pressure on the network from an intermediate unit, the head end unit commands that intermediate unit to participate in charging the brake pipe. The head end unit determines the brake pipe continuity from the pressure increases reported by the intermediate units.

Abstract: Device and method for determining a wheel braking pressure and/or an admission pressure in a braking system in which pressure medium is introduced from a reservoir for the pressure medium having an admission pressure into a wheel brake through at least one shutoff device for inlet and/or outlet and/or passage of a pressure medium, it being possible to remove pressure medium from the wheel brake through at least one means delivering the pressure medium. In so doing, a pressure quantity representing the admission pressure is estimated, at least one operating state of at least one actuator in the braking system is detected and the wheel braking pressure is estimated as a function of the estimated admission pressure and the detected operating states.

Abstract: A target yaw rate setting unit of a control characteristics changing unit computes a first target yaw rate based on the radius of curvature of a curve. A target yaw rate setting unit of a braking force control unit computes a second target yaw rate based on driving conditions. When a cornering decision unit decides a turning intention, if the absolute value of the first target yaw rate is larger than the absolute value of the second target yaw rate, the second target yaw rate is corrected with the first target yaw rate, and the corrected second target yaw rate is outputted to a target yaw rate changing unit. A braking force control unit controls the braking force with the second target yaw rate corrected.

Abstract: A method for diagnosing a braking system using a system including a radio-based hand-held analyzer, at least one radio-based feed valve, and at least one mobile data unit. The braking system includes at least one brake pipe section, a reservoir, and at least one brake cylinder. The brake pipe section connects to the reservoir, the brake cylinder, and the radio-based feed valve. The hand-held radio-based analyzer communicates with the mobile data unit and the radio-based feed valve. The method includes retrieving brake system data and information using the hand-held analyzer, interpreting the retrieved data and information, and performing maintenance functions based on the interpretation of the data and information.

Abstract: Provided is a vehicle testing apparatus which involves load variation and alignment variation, for analyzing a maneuverability of a vehicle on flat belts or rollers adapted to be rotated together with wheels of the vehicle, and in particular, maneuver variation. Load variation caused by an inertia force and a gravitational force which are produced during actual running of the vehicle, and tire alignment variation caused by suspension strokes, are forcibly reproduced by forces produced by actuators or a gravitational force, thereby it is possible to evaluate a maneuverability of the vehicle in a condition substantially the same as that during actual running of the vehicle.

Abstract: The present invention is directed to a wear detection probe in which the deflection of a folded portion of an electric detection wire is suppressed so as to be able to cut the folded portion of the wire in a secure position. A truncated cone is formed at the edge part of a retention member, and a groove extending in a diametric direction is cut at the edge part. A supporting protrusion is formed by traversing the groove, and the electric detection wire is retained in a position in which the folded portion is securely mounted on the supporting protrusion which extends from both openings from which the electric wire extends. The wire is sandwiched by both side walls of the groove and the side walls operate as regulating walls so that when the folded portion of the electric wire begins to be exposed and contacts a brake drum, the folded portion will not be pulled out by a deflecting force in a sidewards direction.

Abstract: During traveling of rolling stock on a route, running velocity of the rolling stock is detected. Vertical acceleration is also detected at a carbody above spring rigging of truck and a component is extracted in a predetermined frequency range from the vertical acceleration. When an absolute value of the vertical acceleration in the frequency range exceeds preset limit vertical acceleration corresponding to running velocity, the rolling stock is judged as being derailed. In another embodiment double integral of the vertical acceleration is carried out every predetermined evaluating time to calculate a vertical displacement amount. In the case that the vertical displacement amount is negative and an absolute value thereof is not less than a predetermined reference value, it is then determined that the rolling-stock is derailed.

Abstract: An improved method of diagnosing conditions of a vehicle braking system that degrade the braking effectiveness informs the driver of the condition so that repair or adjustment can be timely made. The relationship between brake pedal position and vehicle deceleration is determined during a calibration interval to construct a calibration table of brake effectiveness, and then periodically over the life of the braking system to develop a current brake effectiveness table. Braking system abnormalities that impair the braking effectiveness are diagnosed by analyzing the table values.

Abstract: Methods are disclosed for determining, in dependence on the driving situation, the sensitivity of the triggering of an automatic braking operation for a motor vehicle in which an automatic braking operation is triggered during a braking maneuver when the speed of actuation of the brake pedal exceeds a predetermined threshold value. The automatic braking operation consists of the production of a brake pressure higher than that corresponding to the position of the brake pedal. The sensitivity of the triggering of the automatic braking operation is adapted to the driving situation existing at the moment of the braking operation in question, and permits better differentiation between emergency braking and target braking. Variation of the sensitivity of the triggering in dependence on the nature, or the occurrence in terms of time, of the actuation of the pedal by the driver is provided by taking into account only the braking manoeuvre in question and/or the pedal actuations preceding this braking maneuver.

Abstract: A parallel resistor array for progressively detecting brake lining wear. A plurality of conductors are embedded within a brake lining or otherwise disposed between the brake surface and an actuator. Each of the conductors is connected to a resistor that is in turn connected to an indicator circuit. The indicator circuit is also connected to the brake surface. The conductors have progressively increasing lengths extending from the brake surface to the actuator. When the brakes are applied, the brake surface may contact at least one of the conductors to close the indicator circuit. As the brake lining wears, each of the conductors progressively contact the brake surface when the brakes are applied thus progressively adding a resistor to the indicator circuit. The conductors and resistors are arranged in parallel and thus as the brake lining wears, the overall resistance in the indicator circuit progressively decreases.

Abstract: A vehicle brake leakage detector installs between a vehicle brake pedal and a reference point such as a steering wheel, for testing vehicle hydraulic brake systems, and, specifically, for detecting brake fluid leaks. A brake contact at one end of the detector contacts the vehicle brake pedal and a reference end at the opposite end of the detector contacts any tangible reference location, such as a steering wheel. Force means are associated with the detector for applying force for pressurizing the vehicle brake fluid when the detector is installed. A sensor detects relative movement between the brake contact and reference end to determine whether any brake fluid leaks are present. An output source indicates whether any brake fluid leaks are detected.

Abstract: A method of detection and identification of pressure sensor faults in an electro-hydraulic braking system of the type comprising a brake pedal, respective braking devices connected to the vehicle wheels and which communicate with electronically controlled proportional control valves in order to apply hydraulic fluid under pressure to the braking devices, respective pressure sensors for measuring the hydraulic pressures at the individual braking devices, a hydraulic pump driven by an electric motor, a high pressure hydraulic pressure accumulator fed by the pump for the provision of hydraulic fluid under pressure which can be passed to the braking devices via the proportional control valves in order to apply hydraulic fluid under pressure to the braking devices in proportion to the driver's braking demand as sensed at the brake pedal, and a supply pressure sensor for monitoring the hydraulic pressure supplied to the electronically controlled proportional control valves.

Abstract: A vehicle brake leakage detector installs between a vehicle brake pedal and a reference point such as a steering wheel, for testing vehicle hydraulic brake systems, and, specifically, for detecting brake fluid leaks. A brake contact at one end of the detector contacts the vehicle brake pedal and a reference end at the opposite end of the detector contacts any tangible reference location, such as a steering wheel. Force means are associated with the detector for applying force for pressurizing the vehicle brake fluid when the detector is installed. A sensor detects relative movement between the brake contact and reference end to determine whether any brake fluid leaks are present. An output source indicates whether any brake fluid leaks are detected.

Abstract: A universal battery operated measuring device for vehicular diagnostics, which offers a number of diagnostic options due to the universal use of various internal and external sensors and their link-up to one another. The measuring device has a housing top part and a housing bottom part. A keyboard and a display are provided on the housing top part. In addition, a slot is provided through which a strip of paper can be output, showing the measured parameters and results. In addition, a bubble level is provided so that the measuring device can be leveled.

Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.

Abstract: This invention relates to a method and apparatus for determining the effectiveness of a vehicle braking system and for measuring changes in the mass of a wheeled vehicle. The method and apparatus include manually or automatically measuring and inputting vehicle mass to a computer, measuring and inputting brake system pressure during deceleration of the vehicle in a normal operating mode, measuring and inputting road slope, measuring and inputting air friction and engine friction of the vehicle, determining a predicted deceleration of the vehicle, measuring actual deceleration of the vehicle, and providing and using a computer to calculate the effectiveness of the vehicle braking system from data representing actual deceleration of the vehicle, road slope, air friction, engine friction, brake system pressure, vehicle mass, and predicted deceleration for the vehicle under comparable circumstances, and generating a signal representative of the effectiveness of the vehicle braking system.

Abstract: Apparatus 10 (FIG. 1), for testing samples of friction material 31, 32 in rubbing contact with a surface 33 of a rubbing element 34, comprises a table 12 for supporting the rubbing element and a load cell 16 for sensing the load imposed by the frictionally coupled rotating samples from which the coefficient of friction can be determined. To make the tests repeatable rapidly and with identical starting conditions cooling means 40 is interposed between the rubbing element and table. Cooling means 40 comprises a fluid cooled heat exchanger 41, conveniently cooled by local main supply water supplied at its natural temperature, and thermoelectric cooling means 75. The thermoelectric cooling means consists of an array of planar peltier cooling elements which develops a temperature gradient there across which, with reference to the heat exchanger temperature, is able to cool and re-cool the rubbing element to temperatures as low as −25° C. within a matter of minutes.

Abstract: A method and a device for determining at least one basic value of at least one measured quantity of a brake system. At the start of the system, the measured quantity prevailing at that time is then assumed as the basic value.

Abstract: A process to prevent a vehicle, such as a tractor-trailer, from overturning while negotiating a curve recognizes the potential for overturning, and automatically activates a preventive braking process. In addition, the automatic braking process is terminated in a timely fashion to avoid overbraking the vehicle. This is accomplished by subjecting at least one wheel on the inside of the curve to a relatively weak braking force during the automatic braking process, and by adjusting the braking parameters in accordance with the vehicle's response characteristics.

Abstract: The present invention provides a sensor-fault detection circuit for use with either an inductive or capacitive-type sensor. The sensor-fault detection circuit conducts a test signal into the sensor circuit for testing such sensor circuit. A time difference measuring device is provided to analyze for correct duration of the transit time of a test signal or test pulse, respectively, passing through the sensor. In the event that the transit time does not fall within a predetermined range tolerance, a fault indication can be activated. The circuit can be used, for example, to test an inductive bar-type sensor to determine the speed of a wheel on a vehicle.

Abstract: Device for indicating wear of the pads of friction material in so-called floating calipers used in the disc brakes of vehicle wheels and generally comprising a caliper body (13) which is mounted so that it can slide axially by means of at least one hole (12) on at least one guide pin (10, 11), one end of which is rigidly connected, directly or indirectly, to the wheel stub axle, the axis of the guide pin and of the corresponding hole in the caliper body being perpendicular to the plane of the brake disc (18), a pair of pads (19, 20) positioned so that they straddle the disc (18), and a hydraulic piston (26) which acts directly on one (19) of the said pads and indirectly on the other pad (20), via the said caliper body (13). The device includes a linear electrical displacement transducer (34, 35) positioned between a point (32) integral with the said guide pin (10, 11) and a point (38) integral with the said caliper body (13) which slides with respect to the guide pin (10, 11).

Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.

Abstract: A brake shoe assembly includes a brake lining and a brake lining wear sensor. The brake lining has a predetermined thickness which gradually wears away as the brake shoe assembly is used to brake a vehicle. The brake lining wear sensor has a pair of spaced electrical conductors and an electrical resistance located across the pair of spaced conductors for indicating the thickness of the brake lining. The brake lining wear sensor is positioned to wear away concurrently with the brake lining, thereby continuously changing the electrical resistance across the pair of spaced conductors. In this manner, the electrical resistance across the pair of spaced conductors is used to determine the thickness of the brake lining. The brake lining wear sensor can be assembled in alternative embodiments as disclosed.

Abstract: A portable device permits testing of an EOT unit of a two-way end-of-train (EOT) radio telemetry system. During the test, the EOT unit may be mounted to and fully installed on the railcar on which it is to be used. The portable device includes a microprocessor unit, a display, and a transceiver that enables the invention to communicate with the EOT unit. The portable device also includes a mechanism for authorizing the portable device to communicate with the EOT unit. Used to control the overall operation of the portable device, the microprocessor unit operates the transceiver in cooperation with the aforementioned mechanism so as to authorize the portable device to communicate with the EOT unit according to an arming procedure. The microprocessor unit also operates the display on which the progress and completion of the arming procedure is indicated.

Abstract: A tire monitor (100) for use in a remote tire monitor system (1000) includes an accelerometer (902, 904, 906) for detecting acceleration of the tire monitor. Position information for the tire monitor is determined in response to the acceleration. In this manner, tire position information is determined automatically to allow the system to display tire characteristic data such as air pressure in conjunction with tire position.

Abstract: A process for testing and the testing assembly for performing the process for testing an anti-lock brake system (ABS) for a vehicle after installation or work on the ABS without the need to test the vehicle for an ABS design braking event. The process involves engaging a testing unit computer to the electrical communication network of the vehicle and communicating with the Electronic Control Module (ECM) of the ABS. The vehicle is driven onto motorized rollers that can roll the wheels at low speeds without requiring vehicle movement. The testing unit computer makes a series of queries to the ECM to determine status of various parameters. Additionally, the portable computer is used to make directives to the ECM as far as cycling the ABS modulating valves such as the ABS hold solenoids and the ABS decay solenoids and the driver as far as braking or releasing the brake.

Abstract: To prevent a detecting electric wire (20) of a brake pad from moving, a stopper member (12) is provided in a holder (10). Two wires (22) extending a wire holder, are made to intersect close to the posterior of a stopper (12), and are maintained in this intersecting state by a cable tie (13). The stopper member (12) engages the intersecting portion (23) of the wire (20) in a posterior direction, thereby preventing the wire (20) from moving in an anterior direction even under a strong pulling force from the rotor R.

Abstract: A safety inspection system includes a remote control unit having a user interface that is operated by a user to communicate commands to a main unit. The main unit is coupled to a power source, a source of pressurized air, and a trailer, such as a trailer of a tractor-trailer, to enable the user to verify the operation of a variety of lighting elements, which may include clearance and running lights, hazard lights, backup lights, turn signal indicators, and brake lights, and to further verify the operation of an air brake system of the trailer.

Abstract: The monitor for uncommanded braking controls uncommanded brake application on one or more wheels during takeoff of an aircraft. Brake pedal application is determined, brake pressure is measured, and brake pressure is compared with a selected threshold brake pressure. A brake pressure applied signal is generated when the brake pressure exceeds the threshold brake pressure. The pedal application signal and brake pressure applied signal are received by a fault latch logic circuit that generates a fault latch output signal when uncommanded braking has occurred. A test inhibit signal is also generated when weight is not applied on the wheel. The test inhibit signal is also input to the fault latch logic circuit so that uncommanded braking can occur when the aircraft is in the air and weight is off the wheel. The monitor disables or latches off the shutoff valve when pressure is detected without pedal application.

Abstract: In a brake system with electromechanical actuation, a test run is carried out when the vehicle is started, in the course of which at least one wheel brake is acted on by a control signal, which corresponds to a predetermined minimum braking action. If this minimum braking action is not reached in any one of the wheel brakes, the parking brake is not unlocked.

Abstract: A brake tester which is capable of mapping the position of the brake shoe in its extended position. The tester includes a plurality of sensors which are mounted about the brake assembly. The sensors are capable of measuring the distance between the sensor and the brake shoe. In the preferred embodiment, laser sensors are rotated about the brake assembly while the brake shoe is fully extended. The sensed signal is recorded and compiled to generate a mapping of the brake shoe. Alternatively, a plurality of stationary capacitive proximity sensors are disposed about the brake shoe generating a distance signal indicative of the distance between the brake shoe and a simulated drum surface. Such mapping tests for accurate displacement of the brake shoe can predict premature shoe wear and particular wear zones. A secondary function maps the entire surface of the brake shoe lining/friction pad when initial contact is made with the drum surface using the laser sensor.

Abstract: A system for detecting worn brake linings contains sensors located at predetermined depths in the brake linings. Each brake has a corresponding lamp so a problem with a worn lining can be located. The system contains quick-release connections for each sensor, jumper wires for connecting the two sensors per wheel, resistors, diodes and lamps. The system is self-troubleshooting, and can determine the presence and location of worn brake linings, loose wires, open circuits, shorts, grounds, defective bulbs, and blown fuses. The determination of the presence and location of a problem is made through use of lamps which may be off, glowing at half brilliance, or glowing at full brilliance under specified conditions. When the ignition is off, all the bulbs are off. When the ignition is "on", all the bulbs glow at half brilliance if there are no problems. If all the bulbs are out, it is indicative of a power failure.

Abstract: A test device and a method of testing leakage of a brake cylinder on a railroad car having a brake pipe and brake valve. The method includes charging the brake pipe, discharging the brake pipe at least at a service rate to actuate the brakes by charging the brake cylinder and simultaneously with charging the brake cylinder charging a reference volume to the brake cylinder pressure. Discharging of the brake pipe is terminated and the pressure in the reference volume is maintained. The difference of pressure between the brake cylinder and the reference volume, at a fixed period after the beginning of maintaining the pressure in the reference volume, is measured to determine the leakage.

Abstract: A pump failure alarm system which is provided in a hydraulic working machine comprising hydraulic pumps driven by a prime mover, delivery lines joining with one another into one common delivery line on the downstream side, check valves provided in the delivery lines upstream of a point where the delivery lines join with one another, a hydraulic cylinder driven by a hydraulic fluid introduced through the common delivery line, and a hydraulic reservoir. The pump failure alarm system comprises pressure sensors for detecting respective delivery pressures of the hydraulic pumps, bypass lines having one ends connected to the delivery lines at points upstream of the check valves and the other ends connected to the hydraulic reservoir, solenoid switching valves for opening and closing the associated bypass lines, an alarm display unit for giving an alarm in correspondence to each of the hydraulic pumps, and a controller.

Abstract: A test connector enables measurement of pressures contained within a body. The body houses check valves and includes studs to attach a cover to a head of the body. Removal of the cover renders the check valves accessible. The check valves are normally compressed against valve seats formed in the head but when moved away from their seats provide access to the pressures. The test connector includes a contact plate, a support plate, two springs sandwiched therebetween and two double flanged nuts. Each spring is disposed so that it is axially aligned with throughholes defined in the plates. Each nut has its middle section disposed coaxially within one of the springs and its flanged ends keep the plates in proximity to each other while the springs seek to force them apart. Hollow plungers have one end seated in plunger bores in the support plate with the other end free to slide through flow bores in the contact plate.

Abstract: In a brake system with electromechanical actuation, a test run is carried out when the vehicle is started, in the course of which at least one wheel brake is acted on by a control signal, which corresponds to a predetermined minimum braking action. If this minimum braking action is not reached in any one of the wheel brakes, the parking brake is not unlocked.

Abstract: A plate brake tester for testing the adequacy of the brakes of a vehicle includes first and second pairs of weight bearing plates, each sized to receive at least one wheel/tire assembly of a vehicle as a vehicle is driven over the plates. The first pair of plates are spaced from the second pair a predetermined distance along a predetermined direction of travel, which predetermined distance is substantially greater than the length of each plate as measured along the predetermined direction of travel. Sensors sense, for each plate, the brake force applied by a brake associated with the wheel/tire assembly passing over that plate and the dynamic weight of the wheel/tire assembly on each plate during braking. Control circuitry determines from the brake force and the directly sensed dynamic weight the adequacy of the brakes of the vehicle under test. Preferably, the first and second pairs of plates are approximately 30 feet apart along a test lane, and each plate is approximately 36" in length and 48" in width.

Abstract: A brake testing device evaluates the condition of a disk having a disk axis and first and second disk surfaces that are normal to the disk axis. The device has a pair of gauges, each having a sensing element for measuring the position of one of the disk surfaces along a line parallel to the disk axis. The gauges generate position signals corresponding to the measured positions of the disk surfaces. The gauges are secured with respect to each other so as to measure positions along parallel lines, and the device positions the gauges to measure the disk surfaces at points equidistant from the disk axis. The gauges are preferably configured to allow testing a disk surrounded by a wheel and a dust shield. The device may be part of a system which processes the position signals to determine the thickness and the lateral run-out of the disk. The system may additionally compare the thickness and lateral runout to manufacturer-specified standards.

Abstract: The monitor for uncommanded braking controls uncommanded brake application on one or more wheels during takeoff of an aircraft. Brake pedal application is determined, brake pressure is measured, and brake pressure is compared with a selected threshold brake pressure. A brake pressure applied signal is generated when the brake pressure exceeds the threshold brake pressure. The pedal application signal and brake pressure applied signal are received by a fault latch logic circuit that generates a fault latch output signal when uncommanded braking has occurred. A test inhibit signal is also generated when weight is not applied on the wheel. The test inhibit signal is also input to the fault latch logic circuit so that uncommanded braking can occur when the aircraft is in the air and weight is off the wheel. The monitor disables or latches off the shutoff valve when pressure is detected without pedal application.

Abstract: A dual valve apparatus enables quick measurement of pressure contained within a housing. The housing has a main body, a check valve housed in the main body and a cover whose removal renders the check valve accessible. The check valve is normally compressed against a check valve seat to provide a first seal that prevents leakage of the pressure. The dual valve apparatus includes a modified cover, a valve body and a valve stem. The modified cover defines first and second bores axially offset from and in communication with one another. The first bore is at least partially threaded. When the modified cover is secured to the main body, the second bore is aligned with the check valve. The valve body accommodates a valve bore from its protuberant end to its threaded end. The protuberant end is shaped to mate with a female portion of a quick connect coupling. The threaded end screws into the first bore of the modified cover.

Abstract: An apparatus for testing tread and disk brake actuator units for use in railway cars in an overhaul backshop environment is disclosed. The apparatus includes a test bench on which multiple test fixtures are mounted to simultaneously receive and test a like number of brake actuator units. Each test fixture is provided with differently sized sets of brackets to enable respective simultaneous mounting of different brake actuator units made by a variety of manufacturers. The test bench includes a series of solenoids and directional valves operated by a programmable logic controller to supply low, high and maximum pressure air to the actuator units to perform pneumatic leakage, applied force, and slack adjuster travel tests. Pneumatic leakage detection is performed through an automatic test removing human subjectivity from the test process. A diagnostics panel provides functional information on the status of the equipment on the test bench.

Abstract: A brake pipe leakage test for a train is performed using an improved brake pipe drop pressure method prior to departure of the train consist from a railyard terminal. The train consist includes a brake, a brake pipe, and a brake pipe cutoff valve.

Abstract: A dual seal coupling apparatus enables quick measurement of brake cylinder pressure through a receiver assembly of a control valve. The receiver assembly has a receiver body, a check valve housed in the body and a cover whose removal renders the check valve accessible. The check valve is normally compressed against a check valve seat to provide a first seal that prevents leakage of the pressure. When moved away from its seat, the check valve provides access to the pressure. The apparatus includes a boss that protrudes from the cover and a male portion of a quick connect coupling. The boss defines a threaded bore aligned with the check valve when the cover is secured to the receiver body. The male portion includes a valve body and a valve stem. The valve body defines a valve bore and has a threaded end for screwing into the threaded bore of the cover. At its opposite end, the valve body is shaped to mate with a female portion of the quick connect coupling.

Abstract: An automated terminal test system performs a terminal test of brake equipment on a train. The system includes a test control box connected to a head of train locomotive and accessible from outside of such locomotive. Linked to such brake equipment, the test control box has a control for activating the test control box, applying and releasing the brakes, and charging and venting such brake pipe. The system also includes an end of train transceiver device connected to such brake pipe on a last railcar of such train. The end of train transceiver device monitors pressure within such brake pipe on such last railcar, senses movement of such last railcar, and communicates signals representative of such pressure monitored and such movement sensed. The system further includes a head of train transceiver device linked to such brake equipment and connected to such brake pipe on such locomotive.

Abstract: An automated terminal test system and performs a terminal test of brake equipment on a train. The system includes a test control box connected to a head of train locomotive and accessible from outside of such locomotive. Linked to such brake equipment, the test control box has a control for activating the test control box, applying and releasing the brakes, and charging and venting such brake pipe. The system also includes an end of train transceiver device connected to such brake pipe on a last railcar of such train. The end of train transceiver device monitors pressure within such brake pipe on such last railcar, senses movement of such last railcar, and communicates signals representative of such pressure monitored and such movement sensed. The system further includes a head of train transceiver device linked to such brake equipment and connected to such brake pipe on such locomotive.

Abstract: A brake fit adjuster supports a brake drum on a rotatable drum support 20. A brake shoe unit is locked on a mounting mechanism 40. A brake fit is adjusted by applying a pulling force on a wire harness and pressing a brake shoe unit against the inner surface of the rotating brake drum by applying a preset force on the brake shoe unit connected to one end of the wire harness.

Abstract: A process for the verification of an antilock braking system (ABS) in a vehicle to check for correct connection of the component wheel sensors (3, 4, 17, 18, 19, 20), braking pressure modulators (7, 9, 12), and brake cylinders (5, 6, 10, 11, 13, 14) is proposed. The method can be used in a new installation of the ABS or when resuming operation after repair of the system. In a first step, the user causes a single sensed wheel to rotate. This actuates a testing mode in the ABS electronic controller (8). The electronic controller (8) then actuates the modulator belonging to the rotated wheel. From the response of the sensed wheel and/or the actuated modulator, the user recognizes whether the matching between the sensor of the rotated wheel and the actuated modulator is correct. This procedure is then repeated with the other sensed wheels.

Abstract: The monitor for uncommanded braking controls uncommanded brake application on one or more wheels during takeoff of an aircraft. Brake pedal application is determined, brake pressure is measured, and brake pressure is compared with a selected threshold brake pressure. A brake pressure applied signal is generated when the brake pressure exceeds the threshold brake pressure. The pedal application signal and brake pressure applied signal are received by a fault latch logic circuit that generates a fault latch output signal when uncommanded braking has occurred. A test inhibit signal is also generated when weight is not applied on the wheel. The test inhibit signal is also input to the fault latch logic circuit so that uncommanded braking can occur when the aircraft is in the air and weight is off the wheel. The monitor disables or latches off the shutoff valve when pressure is detected without pedal application.

Abstract: In at least one operating situation, especially while the vehicle is stopped, pressure is built up in a defined manner and then released for test purposes without waiting for a steady state value to be reached. On the basis of the pressure-time or force-time curve in at least one wheel brake, a determination is made on whether or not an unacceptable amount of undissolved gas is present in the brake system.