Portable single car charging and test device

• US 6,334,354 B2
• Filed: 04/10/2001
• Issued: 01/01/2002
• Est. Priority Date: 06/03/1999
• Status: Expired due to Term

• Current Assignee: New York Air Brake Corporation (Knorr-Bremse GmbH)
• Original Assignee: New York Air Brake Corporation (Knorr-Bremse GmbH)
• Inventors: Crews, Donald, Vaughn, Lawrence E.
• Primary Examiner(s): Williams, Hezron
• Assistant Examiner(s): CYGAN, MICHAEL T
• Application Number:
  US09/828,785
• Publication Number:
  US 20010011476A1
• Time in Patent Office: 266 Days
• Field of Search: 731/21, 73/39, 303/66, 303/81, 303/86
• US Class Current: 73/39
• CPC Class Codes: G01L 5/28 for testing brakes
• CPC Class Codes: G01M 3/2815 using pressure measurements

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.

Claims

1. A single car test device for a rail car brake system having a brake pipe with a connector, a brake cylinder, a reservoir and a control valve connected to the brake pipe, the reservoir and brake cylinder, the test device comprising:

a source port to be connected to a source of pressurized air, a brake pipe port to be connected to the brake pipe connector and a brake cylinder port to be connected to the brake cylinder;

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, the controller 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 a charging program which connects the source port to the brake cylinder port and alternately connects the brake pipe port to the source port for a sufficient time to charge a quick action chamber of the control valve and to atmosphere for a sufficient time to cause the control valve to open a first valve in the control valve which interconnects the reservoir to the brake cylinder to substantially charge the reservoir through the brake cylinder port and the control valve.

2. The test device according to claim 1, wherein the charging program reconnects the source to the brake pipe after the first valve has closed.

3. A single car test device for a rail car brake system having a brake pipe with a connector, a brake cylinder, a reservoir and a control valve connected to the brake pipe, reservoir and brake cylinder, the test device comprising:

a source port to be connected to a source of pressurized air, a brake pipe port to be connected to the brake pipe connector and a brake cylinder port to be connected to the brake cylinder;

valves selectively interconnecting the ports to each other and atmosphere to perform tests;

a sensor determining pressure at least at the brake pipe port; and

a controller including a program performing a plurality of component tests which form a single car test and a charging program which connects the source port to the brake cylinder port and alternately connects the brake pipe port to the source port for a sufficient time to charge a quick action chamber of the control valve and to atmosphere for a sufficient time to cause the control valve to open a first valve in the control valve which interconnects the reservoir to the brake cylinder to substantially charge the reservoir connected to through the brake cylinder port and the control valve.

4. The test device according to claim 3, wherein the charging program reconnects the source to the brake pipe after the first valve has closed.

5. A method of charging a rail car brake system having a brake pipe having a connector, a brake cylinder having a tap, a reservoir and a control valve connected to the brake pipe, reservoir and brake cylinder, the method comprising:

connecting a source of pressurized air to the brake cylinder tap;

alternately connecting the brake pipe connector to the source for a sufficient time to charge a quick action chamber of the control valve and to the atmosphere for a sufficient time to cause the control valve to open a first valve in the control valve which interconnects the reservoir to the brake cylinder to charge the reservoir through the brake cylinder and the control valve.

6. The method according to claim 5, wherein the source is reconnected to the brake pipe after the first valve has closed.