Abstract: A sample pressure reducing system is provided that integrates various pressure applications into a single system that provides the end user with a high-integrity sample without damaging equipment. The system facilitates sampling high-pressure product into a low-pressure container. The system fills and transfers product to reduce pressure automatically and repeatedly.

Abstract: Disclosed is an automatic brake backup control system and method for a train equipped with an electronic airbrake system and including at least one locomotive, a brake pipe, a source of control pressure, and at least one brake. The system includes a pneumatic operating unit that includes a brake pipe control portion. The brake pipe control portion includes a primary passage network, a control passage network, and an equalizing reservoir control chamber configured to control air pressure of the brake pipe. The brake pipe control portion also includes a first and second electronically controlled charge valve, and a first and second electronically controlled vent valve. The brake pipe control portion further includes an operating state control configured to switch operation of the at least one locomotive between a normal operation mode and a backup operation mode in response to an input by an operator.

Abstract: A control valve device for a highly available pneumatic brake system for a rail vehicle, having a compressed-air inlet which is or can be connected to an outlet of a discharge valve device; a compressed-air outlet which is or can be connected to a relay valve device; and a safety input which is or can be connected to a compressed-air source; wherein the control valve device fluidically connects the safety inlet to the compressed-air outlet in a first switching position and fluidically connects the compressed-air inlet to the compressed-air outlet in a second switching position; wherein the control valve device can modify the inlet pressure in the second switching position in accordance with a control device, in order to provide the outlet pressure.

Abstract: An emergency brake device for a rail vehicle, having an emergency brake control valve device which provides an emergency brake control pressure to a pneumatic brake device of the rail vehicle; and having an emergency brake adjustment device which is capable of adjusting the emergency brake control pressure, which is provided to the pneumatic brake device, as a function of at least a load value of the rail vehicle and a speed value of the rail vehicle. Also disclosed is a brake system for a rail vehicle and to a rail vehicle.

Abstract: A brake actuator assembly for a railway vehicle braking system includes a pair of end members spaced apart from each other along a longitudinal axis of the brake actuator assembly, a hollow flexible elastomeric member, two peripheral flanges extending outwardly from ends of the hollow flexible elastomeric member. Two retaining members, apertures and fasteners are employed for attaching each peripheral flange directly to a respectively positioned end member. The brake actuator assembly is connected to a source of fluid under pressure enabling inflation of the flexible elastomeric member and initiation of a braking sequence of the railway vehicle braking system. The brake actuator assembly of the instant invention allows for improved control of the brake shoe forces including visual travel measurement indication which is especially desirable during light load conditions.

Abstract: The present disclosure relates to brake control systems for the control of air brakes on rail vehicles. More particularly, the present disclosure relates to a unitized brake assembly including a pipe bracket coupled to a combined brake cylinder-empty/load reservoir and a control valve mounted on the pipe bracket.

Abstract: A railcar control apparatus comprises a synchronous slide/slip detector which determines that the axles are synchronously sliding/slipping if an absolute value of axle's speed difference is less than a synchronous slide/slip speed difference threshold and an absolute value of axle's acceleration is greater than a predetermined synchronous slide/slip acceleration threshold.

Abstract: A method of detecting gross weight overload of a vehicle comprising the steps of positioning one or more ultrasonic sensors on the vehicle so that said sensors measure the distance to a ground surface, using the sensors to measure height above the ground surface of the vehicle in a non-overloaded condition, adding known weights to the vehicle until maximum gross vehicle weight (GVW) is attained, ascertaining height above the ground surface at this gross vehicle weight (GVW), and continuously measuring height of the ground surface and collecting height above the ground surface data to establish when an overload condition occurs.

Abstract: The train braking device includes an air brake controller in which a plurality of friction coefficients corresponding to a brake command and a brake initial velocity are stored, an electropneumatic conversion valve that converts a pressure control signal transmitted from the air brake controller into a pneumatic signal, a relay valve that generates a predetermined brake cylinder pressure corresponding to the pneumatic signal, and a brake cylinder that controls brake shoes according to the brake cylinder pressure, wherein the air brake controller generates the pressure control signal based on the friction coefficients corresponding to the brake command and the brake initial velocity.

Abstract: The present method operates an electrically controlled pneumatic (ECP) brake system that includes a system controller and a plurality of ECP devices on a train, in a semi-active mode between an active mode and an in active mode. The method includes setting the system controller to the semi-active mode if the ECP brake command is release; and setting the released ECP devices to the inactive state by the system controller when entering the semi-active mode. The ECP devices are set to an active state and to apply the brake by the system controller in response to an ECP brake command of apply. The ECP devices are reset to release and then to the inactive state by the system controller in response to an ECP brake command of release.

Abstract: A train slide control device and a train slide control method capable of further improving the precision of slide control are achieved. The train slide control device comprises: an electromagnetic valve unit; a relay valve that outputs a pressure of the brake cylinder; and a slide controller that includes: a velocity-difference detecting unit that detects a velocity difference of each wheel based on a velocity signal; a deceleration calculating unit that calculates a deceleration of a train based on the velocity signal; a sliding-amount determining unit that determines a sliding-amount of each wheel based on the velocity difference and deceleration; and a brake-cylinder-pressure calculating unit that calculates a pressure control signal for controlling a pressure of the brake cylinder based on: the sliding-amount; a brake command for obtaining a predetermined deceleration; and a signal that indicates the pressure of the compressed air and a pressure of the brake cylinder.

Abstract: A remote control system for controlling movement of a train comprises one or more sensors positioned relative to a railroad track for detecting the presence of a lead railcar on the track being pushed by a remotely controllable locomotive. The one or more sensors are spaced a distance from a predetermined stop location of a lead railcar and transmit signals when the lead railcar is detected on the track. A programmable controller positioned off-board or wayside receives signals from the one or more sensors and is in radio communication with an onboard operating system of the locomotive. The controller transmits a signal to the locomotive when the lead railcar is detected by a sensor, and in response to the signal the operating system of the locomotive sets a maximum speed setting for the locomotive to travel on the track toward the stop location.

Abstract: A rail vehicle brake system includes an electric controlled pneumatic brake valve having a controller and includes an empty-load device connecting the brake valve to a brake device. An electro-pneumatic lock-out valve is controlled by the controller and has a first position which allows the proportioning of the inlet pressure to the outlet by the empty-load device and a lock-out position which pneumatically prevents the proportioning of the inlet pressure to the outlet by the empty-load device. Also, the system may include a sensor for sensing the vehicle load; and the controller controls the brake valve in response to the sensed load taking into account the operation of the change over valve of the empty-load device. Also, an empty-load device including a load sensor is disclosed.

Abstract: A brake actuator assembly for a railway vehicle braking system comprises a flexible elastomeric member directly and sealably attached to a mounting member employed for attaching the brake actuator assembly to the rigid structure of a braking system and to a push rod member connected to the control linkage. The brake actuator assembly is connected to a source of fluid under pressure enabling inflation of the flexible elastomeric member and initiation of a braking sequence of the railway vehicle braking system. The brake actuator assembly of the present invention allows for improved control of the brake shoe forces including visual travel measurement indication which is especially desirable during light load conditions. Currently used brake assemblies employing cylinder type actuators may be retrofitted with the brake actuator assembly of the invention.

Abstract: A method is disclosed for braking electrically driven vehicles, in particular rail vehicles. In at least one embodiment, the behaviour of the brake system is configured directly as a function of the system state, i.e. the operating conditions of the vehicle, such as for example the laden state of the vehicle, temperature of the engines and in particular of the magnets, as well as redundancy requirements, and therefore permit the fully functioning mechanical brake which is present in vehicles nowadays to be eliminated.

Abstract: A pneumatic emergency brake assurance module comprises a high capacity transfer valve connected in a first position to the output of the variable load relay valve and in a second position connected to a source of emergency braking air pressure. A timing reservoir is in communication with the pilot port of the high capacity transfer valve. A check valve/choke circuit provides parallel connections between a double check valve and the output of the variable load relay valve such that flow from the variable load relay valve passes through a charging choke and opposite flow to the variable load relay valves passes through a dissipation choke.

Abstract: A release graduating proportioning valve for a rail car brake system having a brake pipe, a brake cylinder, and a load sensor valve which selectively connects the control volume to the brake cylinder. The release graduating proportioning valve has a proportioning piston movable between a first position at which a control volume is isolated from atmosphere to a second position at which the control volume is connected to atmosphere, to enable graduated release of brake cylinder pressure. A port to atmosphere is provided in the valve body, and the port is connected to, or isolated from, the control volume responsive to movement of the proportioning piston.

Abstract: A pneumatic emergency brake release timer comprises a high capacity transfer valve, a timing reservoir in communication with the pilot port of the high capacity transfer valve, the check valve and choke circuit providing parallel connections between the main source of pressure and the reservoir through a check valve and opposite flow through a dissipating choke.

Abstract: A high reliability and low power consumption anti-lock brake system is disclosed in the present invention. The two pilot valves in the present invention are controlled so as not to be energized concurrently. The secondary battery of the anti-lock brake system is charged by power supply and/or generator. An electric double layer capacitor comprising a housing made of functionally graded aluminum-ceramic material is used as the secondary battery.

Abstract: A system to remotely report the load condition of a railroad car including a mechanism to sense the load condition in the form of a switch responsive to load condition to change the state of an electrical circuit, a controller to recognize the state of the circuit and a radio wave transmitter directed by the controller to report the condition to a remote receiver. Load is sensed by recognition of the distance between two components of the car, one which remains relatively fixed regardless of the weight of the car, the other which moves relative to the first component as the car weight changes.

Abstract: In a railroad train having a brake system including a fluid carrying brake pipe (14) having an exhaust (52) and connecting a lead locomotive (12) and at least one remote locomotive, the train further comprising a communication system (24) for communicating between the lead locomotive and the remote locomotive, a method for adaptively determining a brake application for signaling a remote locomotive of a train during a communication loss includes determining a brake system operating condition of the train (72). The method also includes determining an operability condition of the communication system (74) and identifying an operator commanded brake application level at the lead locomotive during a communication system inoperability condition (76). The method further includes determining a signaling brake application level sufficient for signaling the remote locomotive via the brake pipe responsive to the monitored brake system operating condition (78).

Abstract: An apparatus engageable with a railway vehicle truck-mounted braking system for compensating for truck bolster movement which includes at least one force transmitting wedge member movable in a reciprocating motion by a pneumatic actuator. The at least one force transmitting wedge member engage rollers rotateably attached to a return push rod member disposed within the truck-mounted braking system for extending the return push rod member to reduce brake shoe clearance prior to brake shoe application. A method for compensating for truck bolster movement also includes fully pressurizing a wedge actuator prior to pressurizing the main brake apparatus actuator. Depressurization of the system returns the force transmitting wedges and return push rod to their original positions upon completion of brake application, subsequently increasing brake shoe clearance for allowable truck bolster movement.

Abstract: An apparatus for communicating information over a pressurized fluid-carrying pipe connecting a plurality of serial nodes. A sounder node (i.e., transmitter) creates variable pressure patterns within the fluid-carrying pipe, which pressure patterns are identified and detected by other nodes. The patterns convey information or solicit responses from the receiving nodes. The receiving nodes reply to the pressure fluctuations by inducing reply pressure fluctuations in the fluid-carrying pipe or by communicating with the sounder node via a separate radio frequency communications system. The apparatus and method can be used as an information-carrying communications medium or a train linking methodology for a railroad train.

Abstract: An automatic coupling system (10) for a locomotive (11). The automatic coupling system includes a means for detecting a coupling contact and for controlling locomotive systems such as throttle and brakes in response to such contact. The means for detecting contact may be a speed sensor (24), an accelerometer (26), a distance detector (28), and/or a wheel slip detector (30). The automatic coupling system may be integrated with a locomotive remote control system (22) to facilitate the coupling of a locomotive to a railcar (40) when the operator is not located in the locomotive cab.

Abstract: A digital multi-point electronic load weigh system is used with a railcar truck control unit to provide a digital all electrical/electronic system, which will perform the brake load weigh function for an electro-pneumatic brake system. The digital multi-point electronic load weigh system is primarily to be used with a distributed electronic control system using neuron style communication/control microprocessors. However, the digital multi-point electronic load weigh system can also be integrated with existing electro-pneumatic brake control components.

Abstract: A digital multi-point electronic load weigh system is used with a railcar truck control unit to provide a digital all electrical/electronic system, which will perform the brake load weigh function for an electro-pneumatic brake system. The digital multi-point electronic load weigh system is primarily to be used with a distributed electronic control system using neuron style communication/control microprocessors. However, the digital multi-point electronic load weigh system can also be integrated with existing electro-pneumatic brake control components.

Abstract: A method of controlling the empty/load setting on cars having electropneumatic brakes. A first signal is set to an empty/load status. The first signal and a second signal is transmitted to the cars. The cars set their empty/load status to the status and in response to the receipt of both signals. The cars transmit their empty/load status, and the empty/load status of the cars is received and displayed.

Abstract: A load sensing system for a rail car brake system, including at least two load sensing devices connected in series. The first load sensing device receives a brake signal from the brake control valve and provides a first braking signal for loads above a first value. It provides a second braking signal less than the first braking signal for loads below the first load value. The second load sensing device receives the first and second braking signals from a first load sensing device. It provides a third braking signal to the brake cylinder for loads above the second value and different from the first value and a fourth braking signal less than the third braking signal for loads below the second value. For loads above the first and second load values, the first and third braking signals are equal to the brake signal. For loads above the second value, the third braking signal is equal to the received first or second braking signal.

Abstract: A load sensing system for a rail car brake system, including at least two load sensing devices connected in series. The first load sensing device receives a brake signal from the brake control valve and provides a first braking signal for loads above a first value. It provides a second braking signal less than the first braking signal for loads below the first load value. The second load sensing device receives the first and second braking signals from a first load sensing device. It provides a third braking signal to the brake cylinder for loads above the second value and different from the first value and a fourth braking signal less than the third braking signal for loads below the second value. For loads above the first and second load values, the first and third braking signals are equal to the brake signal. For loads above the second value, the third braking signal is equal to the received first or second braking signal.

Abstract: A pneumatic system serves as a backup to the electronic system that normally provides load compensation on a railcar truck during both service and emergency applications of the brakes. The pneumatic system compensates for the load railcar bears during service and emergency brake applications whenever the electronic load compensation system fails due to a loss of power or other electrical failure. Ideal for railcar trucks equipped with brake pipe controlled brake equipment, the pneumatic system provides load compensation through use of a four-port variable load valve in combination with a low complexity MC-30A-1 control valve.

Abstract: A method of transitioning between the pneumatic and electric modes of an integrated pneumatic/electro-pneumatic train brake system which includes a brake control having a common operator brake controller. Initially, the control applies the brakes in response to the operator brake controller in the present mode. The control enables the next mode upon request from the operator and applies the brakes in the next mode to match the applied brakes in the present mode. Once the present mode brake is released, the control and system switch to the next mode. Other brake controllers monitor the network and automatically switches modes based on the status of the network.

Abstract: A release graduating valve for freight brake control is provided for a railcar having a pneumatic control valve, emergency and auxiliary reservoirs each normally charged with pressurized fluid from a brake pipe and a fluid pressure activated brake cylinder device for applying the brakes on the railcar. A selectively operable release graduating valve can include a graduated release valve and a changeover valve which selectively interposes the graduated release valve to exhaust brake cylinder pressure in a graduated manner responsive to brake pipe pressure. Alternatively, the changeover valve can isolate the graduated release valve and direct the pneumatic control valve to exhaust brake cylinder pressure in a conventional manner. The changeover valve can be operated responsive to the pressure in an air pipe supplied with pressurized fluid from a remote source.

Abstract: A method and an apparatus for controlling the brake system of a vehicle consisting of at least two component vehicles is described, where the brake system of the second component vehicle is controlled from the first component vehicle. The first time the brake pedal is actuated or the first time the brake pedal is released after the braking force has been built up, actuation pulses for the brake system of the second component vehicle are formed, which are derived from the application point of the brakes of the second component vehicle.

Abstract: An empty-load device with an additional brake cylinder test port which is at the same pressure as the brake cylinder port of the empty-load device. The empty-load device includes a housing and pipe bracket having a brake cylinder, a control valve and brake cylinder test ports. The brake cylinder port and the brake cylinder test port are on one side of the valve seat of the load responsive valve and the control valve port is on an opposite side of the valve seat. A check valve is provided in the brake cylinder test port which is opened when a connector is mated with a brake cylinder test port.