Hydraulic Pressure Control Unit
AssigneeRobert Bosch GmbH
InventorJun Ohtaka
Life of this patent
Estimating the term…
Abstract
The present disclosure obtains a hydraulic pressure control unit capable of appropriately diagnosing presence or absence of fixation of an electromagnetic valve. In the hydraulic pressure control unit according to the present disclosure, a controller includes: an acquisition section that acquires a current value of a current flowing through a coil of the electromagnetic valve in a hydraulic pressure control mechanism; and a diagnosis section that determines whether the current value has exhibited behavior of being temporarily reduced in a process in which the current value is increased at initiation of applying the current to the coil of the electromagnetic valve, so as to diagnose the presence or the absence of the fixation of the electromagnetic valve.
Claims6
A hydraulic pressure control unit for a vehicle behavior control system, the hydraulic pressure control unit comprising:
- a hydraulic pressure control mechanism that includes a base body and components assembled in the base body, the base body including an electromagnetic valve configured to control a hydraulic pressure generated by a hydraulic fluid for the vehicle behavior control system;
- and
- a controller configured to:
- control, with a control section of the controller, operation of the components of the hydraulic pressure control mechanism;
- acquire, with an acquisition section of the controller, a current value of a current flowing through a coil of the electromagnetic valve;
- and
- diagnose, with a diagnosis section of the controller, one of (i) a presence and (ii) an absence of a fixation of the electromagnetic valve by determining whether the current value has exhibited behavior of being temporarily reduced in a process in which the current value is increased at initiation of applying the current to the coil of the electromagnetic valve.
Dependencies are inferred from the claim text.