Patent ID: 11867764
Assignee: ROBERT BOSCH GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for checking a functionality of a solenoid valve for a hydraulic brake system in a motor vehicle, the solenoid valve including an armature and a coil, the method comprising:
moving the armature, on actuation of the solenoid valve, by a magnetic field of the coil to reduce an air gap of the solenoid valve defined by a position of the armature;
measuring an electric current during the actuation of the solenoid valve;
analyzing a characteristic of the measured electric current during the actuation of the solenoid valve, the analyzing including determining a rate of variation of the measured electric current; and
assessing a functionality of the solenoid valve based on the analysis of the characteristic of the electric current, the assessing of the functionality including assessing the solenoid valve as being functional in response to the rate of variation forming a sign reversal and then subsequently attaining a defined threshold value after the sign reversal.