| 摘要 |
An integrated valve assembly (22), which integrates two check valves (60,62) and a solenoid assembly (68) which functions as a purge valve. When the solenoid assembly (68) is in an open position, during a first mode of operation, vacuum pressure places the first check valve (60) in an open position and the second check valve (62) in a closed position, and during a second mode of operation, pressurized air places the first check valve (60) in a closed position, and vacuum pressure generated by a venturi valve member (24) places the second check valve (62) in an open position. Each check valve (60,62) utilizes a nylon insert (114,114a) along with an over molded rubber seal (116,116a). The design of the check valves (60,62) prevents actuation at low vacuums and flows when the vehicle is shut off. The integrated valve assembly (22) eliminates the need for an OBD relief valve, and simplifies the EVAP system, saving costs, complexity, and eliminates several possible leak connections. |
