Abstract: Provided is a monitoring system that can find abnormality in a device that supports a vehicle body of a railway vehicle during running at an early stage. The monitoring system for the railway vehicle includes a detector and a determiner. The detector detects a pressure A1 of a first air spring, a pressure A2 of a second air spring, a pressure A3 of a third air spring, and a pressure A4 of a fourth air spring of the railway vehicle during running. The first, second, third, and fourth air springs are respectively disposed on right front, left front, right rear, and left rear sides in a running direction of the railway vehicle. The determiner determines abnormality from a relation between a magnitude of diagonal imbalance P obtained from a formula (1) or (2) below and a mileage or elapsed time of the railway vehicle.

Abstract: Provided is a brake control system that can reduce use of a mechanical braking in a railway vehicle using an automatic train control (ATC). The present disclosure is a brake control system for a railway vehicle using an ATC. The brake control system includes: a main electric motor, a main conversion device, a brake controller, and an ATC device. The main electric motor generates a braking force by converting kinetic energy of a wheel of the railway vehicle to electrical energy. The main conversion device actuates the main electric motor. The brake controller outputs a braking signal to the main conversion device. The ATC device outputs a braking command to the brake controller based on the ATC. In addition, the ATC device outputs a preliminary braking signal for energizing the main electric motor prior to output of the braking command.

Abstract: Provided is a brake control device that enables shortening of a braking distance in an emergency stop situation, according to an adhesive state of a wheel. The present disclosure relates to a brake control device for emergency stopping of a railway vehicle. The brake control device includes at least one brake unit, a brake controller, and at least one skidding detector. The at least one brake unit generates a braking force. The brake controller is configured to control operation of the at least one brake unit. The brake controller changes a braking pattern to be output to the at least one brake unit based on skidding information of a wheel. The at least one skidding detector is configured to obtain the skidding information.

Abstract: Provided is a monitoring system that can find abnormality in a device that supports a vehicle body of a railway vehicle during running at an early stage. The monitoring system for the railway vehicle includes a detector and a determiner. The detector detects a pressure A1 of a first air spring, a pressure A2 of a second air spring, a pressure A3 of a third air spring, and a pressure A4 of a fourth air spring of the railway vehicle during running. The first, second, third, and fourth air springs are respectively disposed on right front, left front, right rear, and left rear sides in a running direction of the railway vehicle. The determiner determines abnormality from a relation between a magnitude of diagonal imbalance P obtained from a formula (1) or (2) below and a mileage or elapsed time of the railway vehicle.

Abstract: Provided is a brake control system that can reduce use of a mechanical braking in a railway vehicle using an automatic train control (ATC). The present disclosure is a brake control system for a railway vehicle using an ATC. The brake control system includes: a main electric motor, a main conversion device, a brake controller, and an ATC device. The main electric motor generates a braking force by converting kinetic energy of a wheel of the railway vehicle to electrical energy. The main conversion device actuates the main electric motor. The brake controller outputs a braking signal to the main conversion device. The ATC device outputs a braking command to the brake controller based on the ATC. In addition, the ATC device outputs a preliminary braking signal for energizing the main electric motor prior to output of the braking command.

Abstract: Provided is a brake control device that enables shortening of a braking distance in an emergency stop situation, according to an adhesive state of a wheel. The present disclosure relates to a brake control device for emergency stopping of a railway vehicle. The brake control device includes at least one brake unit, a brake controller, and at least one skidding detector. The at least one brake unit generates a braking force. The brake controller is configured to control operation of the at least one brake unit. The brake controller changes a braking pattern to be output to the at least one brake unit based on skidding information of a wheel. The at least one skidding detector is configured to obtain the skidding information.

Abstract: A compressed air supply apparatus includes a control unit configured to operate an air compressor when a measurement value of a pressure measurement unit reaches a first pressure or less, and configured to stop the air compressor when the measurement value reaches a second pressure higher than the first pressure, and a plurality of relief valve apparatuses installed in each of the connection flow path between the air compressor and each of a plurality of air tanks, wherein each of the plurality of relief valve apparatuses is configured to open the connection flow path to the atmosphere when the measurement value reaches a third pressure higher than the second pressure and close the connection flow path when the measurement value reaches a fourth pressure higher than the second pressure and lower than the third pressure after the opening.

Abstract: A compressed air supply apparatus includes a control unit configured to operate an air compressor when a measurement value of the pressure measurement unit reaches a first pressure or less, and configured to stop the air compressor when the measurement value reaches a second pressure higher than the first pressure, and a plurality of relief valve apparatuses installed in each of the connection flow path between the air compressor and each of a plurality of air tanks, wherein the relief valve apparatus configures to open the connection flow path to the atmosphere when the measurement value reaches a third pressure higher than the second pressure and close the connection flow path when the measurement value reaches a fourth pressure higher than the second pressure and lower than the third pressure after the opening.