US 12,449,058 B2
Method for actuating a solenoid valve which is used for throughflow rate control of an agricultural spreading machine
Markus Trentmann, Wallenhorst (DE)
Assigned to Amazonen-Werke H. Dreyer SE & Co. KG, Hasbergen (DE)
Appl. No. 18/273,660
Filed by Amazonen-Werke H. Dreyer SE & Co. KG, Hasbergen (DE)
PCT Filed Jan. 20, 2022, PCT No. PCT/EP2022/051170
§ 371(c)(1), (2) Date Jul. 21, 2023,
PCT Pub. No. WO2022/157215, PCT Pub. Date Jul. 28, 2022.
Claims priority of application No. 10 2021 101 335.6 (DE), filed on Jan. 22, 2021.
Prior Publication US 2024/0084916 A1, Mar. 14, 2024
Int. Cl. F16K 31/06 (2006.01); A01M 7/00 (2006.01); H01F 7/18 (2006.01)
CPC F16K 31/0675 (2013.01) [A01M 7/0089 (2013.01); F16K 31/0655 (2013.01); H01F 7/1844 (2013.01); H01F 2007/1888 (2013.01); H01F 2007/1894 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for actuating a solenoid valve of an agricultural spreading machine which is used for throughflow rate control, wherein the solenoid valve has a valve armature, comprising:
energizing the solenoid valve in order to cause an opening movement of the valve armature or hold the valve armature in an open position in which the solenoid valve is open; and
interrupting or changing the energization of the solenoid valve in order to cause a closing movement of the valve armature in the direction of a valve seat; and
causing a reduction in the movement speed of the valve armature during the closing movement of the valve armature, wherein the solenoid valve has a coil and the energization of the solenoid valve for holding the valve armature in the open position is pulse-width modulated, wherein a negative induction voltage of the coil during pulse width modulated energization of the solenoid valve to hold the valve armature in the open position is limited to a first voltage limit value and during interruption or alteration of the energization of the solenoid valve to cause a closing movement of the valve armature is limited to a second voltage limit value, wherein the magnitude of the second voltage limit value is greater than the magnitude of the first voltage limit value.