Turbo purge valve-check valve OBD vacuum relief
US9360125B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Nov 29, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87981
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An integrated valve assembly, which integrates two check valves and a solenoid assembly which functions as a purge valve. When the solenoid assembly is in an open position, during a first mode of operation, vacuum pressure places the first check valve in an open position and the second check valve in a closed position, and during a second mode of operation, pressurized air places the first check valve in a closed position, and vacuum pressure generated by a venturi valve member places the second check valve in an open position. Each check valve utilizes a nylon insert along with an over molded rubber seal. The design of the check valves prevents actuation at low vacuums and flows when the vehicle is shut off. The integrated valve assembly eliminates the need for an OBD relief valve, and simplifies the EVAP system, saving costs, complexity, and eliminates several possible leak connections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.