24-01-2010, 11:53 PM
Canister purge valve
A purge valve for an evaporative emission control system. The purge valve includes an actuator, a valve body, and a valve closure member disposed in the valve body. The actuator is disposed along a longitudinal axis, and includes an electromagnetic coil having a hollow core extending along the longitudinal axis, a stator disposed in the hollow core, and a permanent magnet armature disposed proximate the stator. The valve body is disposed proximate the actuator, and defines a flow passage extending along the longitudinal axis. When the coil is unenergized, the permanent magnet armature is magnetically attracted to the stator, and the valve closure member is spaced from the armature by a lost motion distance.The canister purge valve forms part of the emission control system. Petrol vapor from the petrol tank that is stored in the carbon absorption filter, is conveyed to the engine through solenoid valve.If the lambda control of the engine is functioning, the valve is powered by the control unit. The extra fuel in form of vapor that is conveyed through this system to the engine is compensated for by the lambda control
read
http://freepatentsonline7044111.html
http://crypton.co.za/Tto%20know/Actuator...valve.html
A purge valve for an evaporative emission control system. The purge valve includes an actuator, a valve body, and a valve closure member disposed in the valve body. The actuator is disposed along a longitudinal axis, and includes an electromagnetic coil having a hollow core extending along the longitudinal axis, a stator disposed in the hollow core, and a permanent magnet armature disposed proximate the stator. The valve body is disposed proximate the actuator, and defines a flow passage extending along the longitudinal axis. When the coil is unenergized, the permanent magnet armature is magnetically attracted to the stator, and the valve closure member is spaced from the armature by a lost motion distance.The canister purge valve forms part of the emission control system. Petrol vapor from the petrol tank that is stored in the carbon absorption filter, is conveyed to the engine through solenoid valve.If the lambda control of the engine is functioning, the valve is powered by the control unit. The extra fuel in form of vapor that is conveyed through this system to the engine is compensated for by the lambda control
read
http://freepatentsonline7044111.html
http://crypton.co.za/Tto%20know/Actuator...valve.html