Backup control system and method for 20 pipe braking system
US5967622A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | May 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S303/03
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a locomotive braking system, an independent brake control circuit uses second control signal(s) to adjust pressure in a first reservoir. A microprocessor derives the second control signal(s) based on at least a first control signal indicative of brake handle position and first feedback indicative of first reservoir pressure. One pneumatic relay adjusts pressure in a 20 pipe based on first reservoir pressure. An automatic brake control circuit uses third control signal(s) to adjust pressure in a second reservoir. The microprocessor derives the third control signal(s) based on at least second feedback indicative of second reservoir pressure and third feedback indicative of pressure in a 20 pipe. Another pneumatic relay controls pressure in a brake cylinder based on whichever of at least the 20 pipe and the second reservoir delivers a highest pressure. A new system for backup control of the 20 pipe includes the microprocessor and a timer. By monitoring the third feedback, the microprocessor determines when 20 pipe pressure falls outside a predetermined range. When the microprocessor begins to monitor the third feedback, the timer activates for a predetermined time. After the predet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.