Patent ID: 6363920
Filing Date: 2002-04-02
Classification: F02M

Abstract:
In an evaporative emission control system for controlling the purging of fuel vapors collected in a canister 12 into an intake system 18 of an internal combustion engine, the improvement comprising:a housing 20 having a chamber 26 formed therein, an inlet port 24 providing fluid communication from said canister 12 to said chamber 26, and an outlet port 30 providing fluid communication from said chamber 26 to the intake system 18 of an internal combustion engine; and a solenoid valve assembly 46 comprising an armature 86, an electromagnetic coil 58, a pole piece 64 disposed within a bore 60 of said electromagnetic coil 58, a valve shaft 74 axially disposed and resiliently biased within a bore 76 formed within said pole piece 64, and a valve member 98 operatively connected to said valve shaft 74 and disposed between said inlet port 24 and said outlet port 30 for controlling fluid flow therethrough in accordance with an electrical control signal 70 supplied to said electromagnetic coil 58, said armature 86 being disposed outside of said electromagnetic coil 58, said solenoid valve assembly 46 including means for resiliently biasing and retaining 90 said armature 86 away from said electromagnetic coil 58, said armature 86 and said biasing and retaining means 90 being constructed to slidably receive and retain a lower end of said valve shaft 74 extending therethrough for operatively connecting said valve shaft 74 with said valve member 98.