New York Air Brake Corporation

Deepak Kumar

Marc S Thomas

Folkert Horst

Marc M Thomas

Michael J Spadaccini

An intelligent, on-board, train brake safety monitoring and fault action system is disclosed. The system compares measured dynamic train brake performance using on-board train control system, such as a LEADER&#xae; system. Using the measured dynamic train brake performance, the brake monitoring system can determine whether the train is capable of stopping within a particular required distance, such as a stop distance set by a positive train control system in which the train is participating. The ongoing ability to meet external braking criteria, such as compliance with positive train control stop distances, may be used to extend the interval between any mandated train brake inspections and tests.

Train brake safety monitoring and fault action system with PTC brake performance assurance

A brake control valve includes a housing, a quick braking chamber and a piston subject to brake pipe pressure on one side of the piston. A bore in the housing connects the quick braking chamber at a first end and the one side of the piston at a second end. A first valve is in the housing at the first end of the bore. A first operator is in the bore for opening the first valve for a range of positions of the piston. The bore has a first portion of a first diameter and a second portion of a second diameter larger than the first diameter. The first bore portion connects the one side of the piston to the second bore portion. A first operator in the bore is connected to the piston. A seal on the first operator is dimensioned to form a seal with the first bore portion and not with the second bore portion. The seal is located on the operator to lie in the first bore portion for a first segment of the range of piston positions and to lie in the second bore portion for a second segment of the range of piston positions.

Dual seal brake control valve

The present empty/load device includes an inlet to receive a brake signal, an outlet for a brake device, load sensing element, a change over valve responsive to the load sensing element to proportion the pressure at the inlet and the outlet when empty is sensed by the load sensing element, a differential pressure element connecting the load sensing element and the change over valve, and a lock-out mechanism to prevent proportioning of the inlet pressure to the outlet when activated. The lock-out mechanism includes a lock-out valve, in a lock-out position, pneumatically preventing proportioning of the inlet pressure to the outlet. A first spring biases the lock-out valve from the lock-out position. A detent engages the lock-out valve and holding the lock-out valve in the lock-out position. The lock-out valve may be connected in parallel to the change over valve with respect to the inlet and the outlet. Alternatively, the lock-out valve may be connected in parallel to the both sides of the differential pressure element.

Lock-out for empty load device

A brake control valve includes a housing, a quick braking chamber and a piston subject to brake pipe pressure on one side of the piston. A bore in the housing connects the quick braking chamber via a first port at a first end and the one side of the piston at a second end. The bore has a first portion of a first diameter and a second portion of a second diameter larger than the first diameter. The first bore portion connects the one side of the piston to the second bore portion. A first operator in the bore is connected to the piston. A seal on the first operator is dimensioned to form a seal with the first bore portion and not with the second bore portion. The seal is located on the operator to lie in the first bore portion for a first segment of the range of piston positions and to lie in the second bore portion for a second segment of the range of piston positions.

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Kingston, Canada

Deepak Kumar