Turbo purge valve-check valve OBD vacuum relief

摘要

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.

主权项

1. An apparatus, comprising:
an integrated valve assembly which is part of an air flow system, including:
a solenoid assembly having an open position and a closed position;a first valve in fluid communication with the solenoid assembly, the first valve unbiased open or closed; anda second valve in fluid communication with the solenoid assembly, the second valve unbiased open or closed;wherein during a first mode of operation and the solenoid assembly is in an open position, vacuum pressure places the first valve in an open position and the second valve in a closed position, and during the second mode of operation and the solenoid assembly is in an open position, pressurized air places the first valve in a closed position, and vacuum pressure places the second valve in an open position.