Brake cylinder maintaining reference
AssigneeNew York Air Brake Corporation
InventorsJason Connell, Eric C. Wright
Life of this patent
Estimating the term…
Abstract
A brake cylinder maintaining system produces a brake cylinder reference pressure based on the difference between the brake pipe pressure and the auxiliary reservoir pressure and then feeds that pressure to a choke and a volume so that the ratio of the reference area of the choke to the volume of stored brake cylinder reference pressure is substantively equal to the ratio of a brake cylinder charging valve area to the brake cylinder volume. The resulting reference pressure may be used to adjust brake cylinder pressure by providing the reference pressure to a standard quick service limiting valve or to a relay that can selectively charge or exhaust the brake cylinder.
Claims16
A system for maintaining pressure in a brake cylinder, comprising:
- a valve responsive to a source of brake pipe pressure and a source of auxiliary reserve pressure to provide a brake cylinder reference pressure based on the difference between the brake pipe pressure and the auxiliary reservoir pressure;
- a choke in communication with the valve and having a reference area for restricting the flow of the brake cylinder reference pressure;
- and
- a volume in communication with the choke for storing the restricted brake cylinder reference pressure.
The system of claim wherein the ratio of the reference area of the choke to the volume of stored brake cylinder reference pressure is substantively equal to the ratio of a brake cylinder charging valve area to the brake cylinder volume.
Dependencies are inferred from the claim text.