A method for operating a hydraulic valve of a hydraulic device of a motor vehicle transmission device, wherein an actuating current of the hydraulic valve is superposed with a modulation alternating current in order to adjust a shaking vibration of the hydraulic valve by a control device, wherein a deviation between an actual pressure resulting from the actuating current and a setpoint pressure determined as a function of the actuating current is determined for the hydraulic device by means of an electronic computing device, and an amplitude and/or a frequency of the modulation alternating current is increased as compared to a starting value equalizing a hysteresis of the actual pressure relative to the setpoint pressure, as a function of a tolerance range being exceeded by the determined deviation.

A device for operating an electrical consumer, in particular a solenoid valve, including at least one first circuit which encompasses an activatable first switch and a first freewheeling unit connected or connectable in parallel to the consumer, and including a control unit which is designed for activating the first switch in order to energize the consumer with a predefinable electric current with the aid of pulse width modulation. It is provided that the circuit encompasses at least one second switch and one second freewheeling unit, which is connected or connectable in parallel to the consumer, and that the control unit is designed for activating the second switch in a phase-shifted manner with respect to the first switch in order to energize the consumer.

A method for actuating a valve with a magnetic valve drive, through which electric current is passed to open the valve, to close the valve, and to hold the valve in an open or closed position, includes receiving an opening signal. The method further includes varying the electric current that is passed through the valve drive as a first current signal to open the valve in response to the received opening signal. The method further includes receiving a closing signal and varying the electric current that is passed through the valve drive as a second current signal for closing the valve in response to the received closing signal. The second current signal has at least two variations of the electric current at separate times.

(Problem) The invention is to provide to a solenoid valve drive control device, in which though the magnetic path is normally composed (i.e. the plunger is attached to the attracting member), it is never determined by mistake as the dropout, and it is never entered into the reabsorption mode of the plunger. (Resolution Approach) The invention is a solenoid valve drive control device of the invention, in which by controlling of the zero cross timing generation device 72, after application of the electric current to the solenoid 66 is started at zero cross timing by the switching device 68, when the current value that flows to the solenoid 66 detected by the electric current sensing device 78 reaches the circuit protection electric current value Ic (A), a stabilization mode that repeats the ON-OFF cycle plural times (four times of the total in the Embodiment of FIG. 4), in which application of the electric current to the solenoid 66 is interrupted by the switching means 84, is operated (see A5-A8 in FIG. 4).

A method of controlling a solenoid valve having a solenoid coil and a poppet includes energizing a first node to a first voltage, and coupling the first node to the solenoid coil and energizing the solenoid coil using a pulse-width-modulated (PWM) signal having a frequency and a duty cycle configured to regulate a current conducted through the solenoid coil to below an opening threshold. The method further includes energizing a second node to a second voltage with energy stored in the solenoid coil, and coupling the second node to the solenoid coil and energizing the solenoid coil using a DC signal configured to increase the current to above the opening threshold. The method further includes coupling the first node to the solenoid coil and energizing the solenoid coil using the PWM signal having a frequency and duty cycle configured to regulate the current to above a closing threshold.

A method for controlling a part movable with a coil. In this case, a current flowing through the coil and/or a voltage applied to the coil is/are scanned in order to generate a coil signal. In a further step, at least one movement parameter representing an oscillatory movement of the part is ascertained by using the coil signal. Finally, at least one signal parameter of a dither signal is optionally changed to generate the oscillatory movement by comparing the movement parameter to the at least one setpoint value to adapt the oscillatory movement to the setpoint value.

A drive device includes: a first current path that has a high-side MOSFET; a second current path that has a low-side MOSFET; and a third current path connected to the other end portion of a coil and positioned between the first current path and the second current path. The drive device further includes: PWM drive circuits that generate a drive signal through PWM control; and an overcurrent detection circuit that detects that an overcurrent has flowed through the current paths. It is possible to precisely detect the occurrence of a battery short circuit and a ground short circuit by detecting which of the first current path and the second current path an overcurrent has flowed through.

Provided are embodiments for operating an autonomous mode change circuit for solenoid drivers. The embodiments include initiating an operation of a solenoid, and receiving a command to control the operation of the solenoid. The embodiments also include controlling, by a drive circuit, a switch coupled to the solenoid based at least in part on the command, and detecting at least one of a current or voltage of the solenoid, and subsequently controlling the operation of the solenoid based at least in part on the detection.

A fast shut-off solenoid circuit network includes a solenoid circuit and a current dissipation circuit. The solenoid circuit is operable in response to an electrical current, and configured to operate in an enable mode and a disable mode. The current dissipation circuit is configured to dissipate the current discharged from the solenoid circuit in response to invoking the disable mode. The fast shut-off solenoid circuit network further includes a dissipation bypass circuit. The dissipation bypass circuit is configured to divert the current discharged by the solenoid circuit away from current dissipation circuit when operating in the enable mode.

A drive circuit for operating a solenoid includes a main switch and a charge pump circuit. The main switch is coupled in series with a coil of the solenoid. The main switch is configured to selectively enable current flow from a voltage source according to a main switching signal to translate a poppet of the solenoid between an opened position and a closed position. The charge pump circuit is coupled to the voltage source. The charge pump circuit is configured to discharge through the coil to translate the poppet from the closed position to the opened position, and to charge when the poppet is held in the opened position.