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AssigneeRobert Bosch GmbH
InventorsHerman Gaessler, Udo Diehl, Karsten Mischker, Rainer Walter, Juergen Schiemann, Christian Grosse, Volker Beuche, Stefan Reimer, Uwe Liskow
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The present invention relates to a method and a circuit system for operating a solenoid valve (MV), particularly for actuating an electrohydraulic gas-exchange valve control, an injection valve, or an intake or exhaust valve of an internal combustion engine. To permit the simplest possible driving of the solenoid valve (MV), it is proposed that the solenoid valve (MV) be acted upon in a controlled manner in a cycle including three phases, in which in a pull-up phase, the solenoid valve (MV) is connected for a predefined time duration (T—1) to a first voltage (U—1) of predetermined magnitude for generating a pull-up current, in a holding phase is connected to a second voltage (U—2) of predetermined magnitude for generating a holding current, and in a de-energize phase is separated from both voltages (U—1, U—2).
A method for operating a solenoid valve (MV), particularly for actuating an electrohydraulic gas-exchange valve control, an injection valve, or an intake or exhaust valve of an internal combustion engine, wherein the solenoid valve (MV) is acted upon in a controlled manner in a cycle including three phases, in which in a pull-up phase, the solenoid valve (MV) is connected for a predefined time duration (T_1) to a first voltage (U_1) of predetermined magnitude for generating a pull-up current, in a holding phase is connected to a second voltage (U_2) of predetermined magnitude for generating a holding current, and in a de-energize phase is separated from both volt ages (U_1, U_2).
A circuit system for operating a solenoid valve (MV), particularly for actuating an electrohydraulic gas-exchange valve control, an injection valve, or an intake or exhaust valve of an internal combustion engine, wherein the circuit system has a first voltage (U_1) of predefined magnitude, a second voltage (U_2) of predefined magnitude and two switching elements ((S_1, S_2) for applying the first voltage (U_1) to the solenoid valve (MV) in the pull-up phase, for applying the second voltage (U_2) to the solenoid valve (MV) in the holding phase, and for separating the solenoid valve (MV) from both voltages (U_1, U_2) in the de-energize phase.
Dependencies are inferred from the claim text.