METHOD FOR SUPPRESSING INTERFERENCE

• US 20120126882A1
• Filed: 11/11/2011
• Published: 05/24/2012
• Est. Priority Date: 11/18/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: STEINERT, Thomas, BEVOT, Claudius, SCHULZ, Thomas
• Granted Patent: US 9,423,792 B2
• Time in Patent Office: Days
• US Class Current: 327/553
• CPC Class Codes: F02D 41/1401 characterised by the control or regulation method F02D41/1473, F02D41/1477 take precedence
• CPC Class Codes: F02D 41/1455 with sensor resistivity varying with oxygen concentration F02D41/1456 takes precedence
• CPC Class Codes: F02D 41/1477 characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
• CPC Class Codes: F02D 41/1486 with correction for particular operating conditions
• CPC Class Codes: G05B 21/02 electric

Abstract

In a method for suppressing interference in a controlled variable in a control circuit, in which the actuating variable is the useful signal, the controlled variable is detected continuously, at two successive sampling instants in each case, the values of the controlled variable are subtracted, and if the absolute amount of the difference deviates by a predefinable setpoint value, at least one control parameter is modified, in such a way that the response of the actuating variable to the interference is minimized.

Claims

1. A method for suppressing interference in a controlled variable in a control circuit, in which an actuating variable is a useful signal, the method comprising:

detecting the controlled variable continuously, at two successive sampling instants in each case;

subtracting values of the controlled variable; and

if an absolute amount of a difference deviates by a predefinable setpoint value, modifying at least one control parameter, in such a way that a response of the actuating variable to the interference is minimized.

2. The method according to claim 1, wherein the useful signal is not used during a modification of the at least one control parameter, or is identified as not usable.

3. The method according to claim 1, wherein all control parameters are reset to their initial values.

4. The method according to claim 1, wherein an amplification in the control circuit is reduced by modifying the control parameters.

5. The method according to claim 1, wherein a comparison takes place at time-discrete intervals.

6. The method according to claim 1, wherein the actuating variable is a pump current of a regulated Lambda probe.

7. A computer-readable medium containing a computer program which when executed by a processor performs the following method for suppressing interference in a controlled variable in a control circuit, in which an actuating variable is a useful signal:

detecting the controlled variable continuously, at two successive sampling instants in each case;

subtracting values of the controlled variable; and

if an absolute amount of a difference deviates by a predefinable setpoint value, modifying at least one control parameter, in such a way that a response of the actuating variable to the interference is minimized.