Patent ID: 6394414
Filing Date: 2002-05-28
Classification: H01F

Abstract:
An electronic control circuit for controlling an electromagnetic valve which has an armature and a coil, the electronic control circuit comprising:an electronic switching element connected in series with the coil of the electromagnetic valve, the electronic switching element controlling a valve voltage which is applied to the coil so that the valve voltage reaches a first value when the electromagnetic valve is switched on, wherein, at the first value, the valve voltage has a form of a switch-on pulse, wherein, after the valve voltage reaches the first value, the electronic switching element reduces the valve voltage to a second value which is between zero and the first value, wherein the second value forms an initial value of a switch-on ramp, wherein the switch-on ramp has a dead time following the switch-on pulse, and wherein, during the dead time, the second value of the valve voltage does not change, and wherein, after the valve voltage reaches the second value, the electronic switching element controls the valve voltage to reach a third value, the third value being greater than the second value and representing a holding voltage for maintaining the armature of the electromagnetic valve in a switched-on position.