Methods and system for controlling latching exhaust valves
US6896339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Mar 12, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/665
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic braking method and system for a vehicle is provided. The system includes a brake cylinder, a reservoir, a latching exhaust valve (LEV) movable between an open position and closed position and fluidly connected between the reservoir and the brake cylinder. The LEV includes a first solenoid having a first pilot fluidly connected to the reservoir and a second solenoid having a second pilot fluidly connected to the reservoir wherein the pilots are configured to be controlled electronically and pneumatically, and are selectable between electronic and pneumatic control based on vehicle operating requirements. The solenoids are configured to be piloted with pneumatic pressure from the reservoir and an electronic controller that includes a release on failure circuit. The release on failure circuit is configured to control the LEV during at least one of a loss of power to the braking system and a failure of the electronic controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.