Back to results
US 5,823,640 AGranted
Method and device for driving an electromagnetic valve
AssigneeRobert Bosch GmbH
InventorsAlexander Eichhorn, Helmut Wiss
Life of this patent
Estimating the term…
Abstract
A method and device for driving an electromagnetic valve, in particular an electromagnetic valve of a braking system having antilock protection and/or a traction control system. When switched over into the position that permits the passage of flow, the valve is so driven that, in a first phase for a specifiable time (DT), the current falls off in accordance with a first function and remains nearly constant over time in a second phase.
Claims5
A method for driving an electromagnetic valve, comprising the steps of:
- positioning the valve in a first position when a current signal assumes a first current value;
- positioning the valve in a second position when the current signal assumes a second current value;
- and
- controlling the valve via the current signal following a switch over, wherein the current signal transitions from the first current value to a third current value in a specified time interval according to a first function during a first phase, and, in a second phase, the current signal assumes at least one of a substantially constant value and a value corresponding to a pressure change over time, and wherein the third current value is between the first current value and the second current value.
1 more element
A device for driving an electromagnetic valve, comprising:
- a valve controller;
- wherein the valve controller controls the valve via a current signal;
- wherein the valve controller positions the valve in a first position when the current signal assumes a first current value and positions the valve in a second position when the current signal assumes a second current value;
- and wherein the valve controller, following a switch over, transitions the current signal from the first current value to a third current value in a specified time interval according to a first function during a first phase, the third current value being between the first current value and the second current value, and, in a second phase, forces the current signal to assume at least one of a substantially constant value and a value corresponding to a pressure change over time.
1 more element
Dependencies are inferred from the claim text.