Method for predefining a current in a solenoid valve

Patent metadata

Field	Value
Publication number	US-2016102779-A1
Application number	US-201514882666-A
Country	US
Kind code	A1
Filing date	Oct 14, 2015
Priority date	Oct 14, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

A method for predefining a current through a solenoid coil of a solenoid valve, a closing point in time of the solenoid valve being detected with the aid of a sensor, a sensor value being monitored, and, when a premature closing of the solenoid valve is identified based on the monitored sensor value, the current through the solenoid coil of the solenoid valve is increased.

First claim

What is claimed is:

1 . A method for predefining a current through a solenoid coil of a solenoid valve, comprising:
detecting a closing point in time of the solenoid valve via a sensor; monitoring a sensor value; and when a premature closing of the solenoid valve is identified based on the monitored sensor value, increasing the current through the solenoid coil of the solenoid valve.

2 . The method as recited in claim 1 , wherein the premature closing of the solenoid valve is identified based on the monitored sensor value when the sensor value one of reaches and exceeds a sensor threshold value.

3 . The method as recited in claim 1 , wherein the premature closing of the solenoid valve is identified based on the monitored sensor value when a gradient over time of a chronological progression of the sensor value one of reaches and exceeds a gradient threshold value.

4 . The method as recited in claim 1 , wherein the current through the solenoid coil in the solenoid valve is only increased up to a maximum value.

5 . The method as recited in claim 1 , further comprising creating a diagnostic message when the current through the solenoid coil in the solenoid valve is increased to a diagnostic value.

6 . The method as recited in claim 1 , wherein the sensor value is monitored during a time period in which the solenoid coil is activated.

7 . The method as recited in claim 1 , wherein the sensor value is output as a voltage signal by the sensor.

8 . The method as recited in one of the preceding claims, wherein the current (I) through the solenoid coil ( 17 ) of the solenoid valve ( 10 ) is increased in an activation process following an activation process in which the premature closing of the solenoid valve ( 10 ) has been identified.

9 . The method as recited in claim 1 , further comprising storing, after the current has been increased, a value of the current for subsequent activation processes as a new value of the current.

10 . The method as recited in claim 1 , wherein the solenoid valve is used for a solenoid valve injector for injecting fuel into a combustion chamber of an internal combustion engine. The method as recited in claim 10 , wherein the fuel is injected from a high-pressure accumulator.

12 . An arithmetic unit for predefining a current through a solenoid coil of a solenoid valve, comprising:
an arrangement for detecting a closing point in time of the solenoid valve via a sensor; an arrangement for monitoring a sensor value; and an arrangement for, when a premature closing of the solenoid valve is identified based on the monitored sensor value, increasing the current through the solenoid coil of the solenoid valve.

13 . A computer program, which prompts an arithmetic unit to carry out a method for predefining a current through a solenoid coil of a solenoid valve, the method comprising:
detecting a closing point in time of the solenoid valve via a sensor; monitoring a sensor value; and when a premature closing of the solenoid valve is identified based on the monitored sensor value, increasing the current through the solenoid coil of the solenoid valve.

14 . A machine-readable storage medium having a computer program stored thereon, which prompts an arithmetic unit to carry out a method for predefining a current through a solenoid coil of a solenoid valve, the method comprising:
detecting a closing point in time of the solenoid valve via a sensor; monitoring a sensor value; and when a premature closing of the solenoid valve is identified based on the monitored sensor value, increasing the current through the solenoid coil of the solenoid valve.

Assignees

• Bosch Gmbh Robert

Inventors

• Lang Heike
• Schmitt Frank
• Kober Ralph
• Rapp Holger
• Fischer Fabian
• Beier Marco
• Stein Stefan

Classifications

• F16K31/06

  using a magnet {, e.g. diaphragm valves, cutting off by means of a liquid} · CPC title

• F02D41/263

  the program execution being modifiable by physical parameters · CPC title

• F02M51/061

  using electromagnetic operating means · CPC title

• F16K37/0083 Primary

  by measuring valve parameters · CPC title

• F02M57/005

  the devices being sensors · CPC title