Portable single car test device
AssigneeNew York Air Brake Corporation
InventorLawrence E. Vaughn
Life of this patent
Estimating the term…
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.
Claims11
A single car test device for a rail car brake system having a brake pipe with a connector, a brake cylinder and a control valve connected to the brake pipe and brake cylinder, the test device comprising:
- a source port to be connected to a source of pressurized air and a brake pipe port to be connected to the brake pipe connector;
- valves selectively interconnecting the ports to each other and atmosphere to perform tests;
- a sensor determining pressure at least at the brake pipe port;
- a display;
- operator input device;
- and
- a controller connected to the display, input device, valves and sensor and including a program performing a plurality of component tests which form a single car test, the program provides a prompt of corrective action for a failed component test and upon receipt of a start command, begins the failed component test again.
A single car test device for a rail car brake system having a brake pipe with a connector, a brake cylinder and a control valve connected to the brake pipe and brake cylinder, the test device comprising:
- a source port to be connected to a source of pressurized air and a brake pipe port to be connected to the brake pipe connector;
- valves selectively interconnecting the ports to each other and atmosphere to perform tests;
- a sensor determining pressure at least at the brake pipe port;
- a display;
- operator input device;
- and
- a controller connected to the display, input device, valves and sensor and including a program performing brake application and release test, the program measures brake cylinder pressure for some of the test if a brake cylinder tap is in the brake system and measures brake pipe pressure and prompts the operator to enter requested observations for some of the tests if a brake cylinder tap is not in the brake system.
A single car test device for a rail car brake system having a brake pipe with a connector, a brake cylinder and a control valve connected to the brake pipe and brake cylinder, the test device comprising:
- a source port to be connected to a source of pressurized air and a brake pipe port to be connected to the brake pipe connector;
- valves selectively interconnecting the ports to each other and atmosphere to perform tests;
- a sensor determining pressure at least at the brake pipe port;
- a display;
- operator input device;
- a controller connected to the display, input device, valves and sensor and including a program performing a plurality of component tests which form a single car test as a function of inputs from the operator in response to displayed information;
- and
- the program including a system leakage test which connects the source port to the brake pipe port, takes a series of leakage measurements at a fixed interval, determines if the difference between two measurements is greater or less that a first value, if greater, continues taking measurements for no greater than a first number of pairs of measurements, and if less, continues taking measurements for no greater than a second number of pairs of measurements, the second number is greater than the first number.
A single car test device for a rail car brake system having a brake pipe with a connector, a brake cylinder and a control valve connected to the brake pipe and brake cylinder, the test device comprising:
- a source port to be connected to a source of pressurized air and a brake pipe port to be connected to the brake pipe connector;
- valves selectively interconnecting the ports to each other and atmosphere to perform tests;
- a sensor determining pressure at least at the brake pipe port;
- a display;
- operator input device;
- a controller connected to the display, input device, valves and sensor and including a program performing a plurality of component tests which form a single car test as a function of inputs from the operator in response to displayed information;
- and
- the program including a brake cylinder leakage test which connects the brake pipe port to exhaust to produce a fixed reduction of the brake pipe port pressure;
- measures brake cylinder pressure before and after the reduction;
- and compares the difference between the measured brake cylinder pressures to a first value for an empty car and to a second value for a loaded car.
Dependencies are inferred from the claim text.