Portable single car test device
First Claim
Patent Images
1. 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.
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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.
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Citations
11 Claims
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1. 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:
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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. - View Dependent Claims (2, 3)
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4. 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:
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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. - View Dependent Claims (5, 6, 7, 8)
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9. 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:
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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.
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10. 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:
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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.- View Dependent Claims (11)
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Specification