Drive circuit for an electromagnetic valve

摘要

A method of energising an electromagnetically operable valve which comprises a valve member (16A) movable into engagement with a seating (16B) when a winding (18) is energised comprising connecting the winding to a DC supply to achieve a rapid rate of rise of current. The current is controlled at the peak value and is then reduced to a low value after an initial movement of the valve member. The valve member continues its movement towards the seating and the current is restored prior to engagement of the valve member with the seating to substantially eliminate bouncing of the valve member away from the seating.