F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
123/183
F01L 9/04 (2006.01) H01F 3/10 (2006.01) H01F 7/16 (2006.01)
Patent
CA 1272086
Abstract Apparatus and method for control of actuator anchor plate release time in spring-biased electromagnetically- actuated positioning systems for gas exchange valves in internal combustion engines in which a ferromagnetic actuator anchor plate is moved back and forth between two actuating solenoids. Pursuant to the invention, the poles of the solenoid core and the anchor plate are separated by a member which may be formed of an electrically-nonconductive, paramagnetic or diamagnetic layer, or an air gap. this provides magnetic resistance in the magnetic circuit which reduces generation and propagation of eddy currents in the anchor plate. The magnetic field can decay more rapidly upon cut-off of current to the solenoid coil. The release time of the anchor plate from the actuating solenoid is thereby diminished, and more accurate valve dwell timing is achieved for improved engine performance.
506462
Audi Ag
Marks & Clerk
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