Method for actuating a valve

Patent metadata

Field	Value
Publication number	US-10767783-B2
Application number	US-201815973895-A
Country	US
Kind code	B2
Filing date	May 8, 2018
Priority date	May 8, 2017
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

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.

First claim

What is claimed is:

1. 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, comprising:
receiving an opening signal;
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;
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,
wherein the second current signal has at least two variations of the electric current at separate times, a first of the at least two variations causing the valve to partly close, and a second of the at least two variations causing the valve to fully close,
wherein the at least two variations of the electric current at separate times are in the form of successive pulses at the separate times and a value of the electric current is reduced to zero between the successive pulses.

2. The method according to claim 1 , further comprising:
operating the valve to partly close if the electric current is flowing through the valve drive; and
operating the valve to open if no electric current is flowing through the valve drive.

3. The method according to claim 1 , further comprising:
energizing the valve for closing such that it is closed with three mutually adjoining partial strokes.

4. The method according to claim 1 , wherein the at least two variations of the electric current at separate times are in the form of successive steps of a staircase.

5. The method according to claim 4 , wherein the steps of the staircase each have a current level.

6. The method according to claim 1 , further comprising:
operating the valve as at least one of:
(1) full strokes in a switching mode during the variation of the electric current as the first signal, and
(2) volumetric flow-dependent partial strokes in a setting mode during the variation of the electric current as the second signal.

7. The method according to claim 1 , wherein a computer program is configured to carry out the method.

8. The method according to claim 7 , wherein the computer program is stored in a machine-readable memory medium.

Assignees

• Bosch Gmbh Robert

Inventors

• Hilden Michael

Classifications

• H01F2007/1894

  minimizing impact energy on closure of magnetic circuit · CPC title

• H01F2007/1888

  using pulse width modulation · CPC title

• B60T8/36

  including a pilot valve responding to an electromagnetic force · CPC title

• H01F7/18

  Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title