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Method for recognizing and correcting errors

An error identification and error technology, applied in the direction of error prevention, transmission system, electrical components, etc., can solve the problem of inability to distinguish error types, etc., and achieve the effect of reliable error elimination

Inactive Publication Date: 2006-07-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Error types cannot be distinguished in such plausibility studies either

Method used

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  • Method for recognizing and correcting errors
  • Method for recognizing and correcting errors
  • Method for recognizing and correcting errors

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In operating point 1 and zone 1 of the diagnostic characteristic curve family, existing errors can be correctly identified. In operating point 2 and area 2 of the diagnostic characteristic map, the existing error cannot be recognized.

[0024] Under this condition, an error is identified at the operating point BP1 and a compensation measure is initiated. For this knock recognition embodiment, for example, the error of the knock sensor is recognized, and the ignition angle is adjusted not according to the output signal of the sensor, but according to a predeterminable compensation value. After the error recognition, the operating point changes. This error cannot be recognized in operating point 2. However, because the error recognition is realized in the area B1, the error elimination is cut off. Thus, the error remains recognized and the compensation measures keep working. If the error disappears in the process of continuing the operation, the error elimination cannot be real...

Embodiment 2

[0026] In the operating point BP1 and the operating point BP3, that is, in the areas B1 and B3 of the diagnostic characteristic curve family, an existing error can be correctly identified. However, the existing error cannot be recognized in the operating point BP2 and the area B2 of the diagnostic characteristic curve family.

[0027] In this case, the error is identified at the operating point BP1 and a compensation measure is initiated. Then switch to working point BP2. According to the example given, the error cannot be recognized there. In this way, the error elimination is cut off because the error recognition is realized in the area B1. Thus, as long as it is in the operating point BP2, the error remains recognized and the compensation measures remain active. This error can be recognized when switching to the working point BP3 next. Because the error has been identified in the area B1 and the compensation measures have been initiated, you only need to pay attention at this t...

Embodiment 3

[0030] In Embodiment 3, it is explained in detail that the error type is considered when the error is eliminated. In Embodiment 3, the premise is that the monitored signal is located between the two thresholds SCHO and SCHU. If the signal is higher than the upper threshold, it is recognized as an error with an error type of MAX error. If it is lower than the lower threshold, it is recognized as an error whose error type is MIN error. In the operating point BP1, that is to say in the area B1, not only the MIN error but also the MAX error can be recognized. In contrast, only MIN errors can be identified in the operating point BP2.

[0031] In the operating point BP1, the signal is below the lower threshold, an error of the MIN error type is recognized and a compensation measure is initiated. Then switch to working point BP2. Here, it is also recognized as an error of the MIN error type. In this way, the error remains recognized and the compensation measures keep working. In the next...

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PUM

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Abstract

A method for error detection and error correction in the monitoring of measurement values is disclosed, in which the value to be tested is checked for plausibility in an evaluation device, for example a computer, and in the event that an implausibility is identified, the existence of an error is determined. If a further check finds that the error no longer exists, then an error correction takes place. A prerequisite for the error correction, however, is that the range of the value to be monitored in which the error has occurred is also the range in which a current error is no longer occurring. In an expanded method, a differentiation is also made between different errors and an error correction is only possible if it involves the same type of error.

Description

Technical field [0001] The invention relates to a method for error recognition and error elimination, in particular to a diagnostic device connected to a knock adjustment device in an internal combustion engine. The invention also relates to a device for error recognition and error elimination. Background technique [0002] It is known to perform a diagnosis in various devices in which the credibility of a component or a signal emitted by the component or sensor is checked, and whether there is an error is determined by means of such a credibility check. After the error is detected, compensation measures are initiated or an equivalent parameter is used instead of the measured parameter. An error that has been identified once can also be determined to have been eliminated, that is, the error identified at an earlier point in time no longer exists. In this case, compensation measures are generally cancelled. [0003] In known diagnostic functions, for example running in an internal...

Claims

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Application Information

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IPC IPC(8): F02D41/22F02D45/00H04L1/00
CPCF02D41/22Y02T10/40
Inventor 斯特芬·弗兰克克里斯蒂娜·埃贝勒卡斯滕·克卢特德特勒夫·海因里希托马斯·埃德尔曼
Owner ROBERT BOSCH GMBH
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