Method and system for correcting air mass flow

A mass flow and flow measurement technology, applied in the field of calibration, can solve problems such as drift and inaccurate measurement

Active Publication Date: 2018-06-22
WEICHAI POWER CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] In view of this, the present invention provides a method and system for correcting the intake air mass flow rate, which is used to solve the problem of the air intake pipe in the engine due to the sensitivity of the flow sensor to the pipeline and the environment in the existing intake mass flow measurement method. The layout of the road and the use of measurement drift, resulting in inaccurate measurement. The specific solution is as follows:

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  • Method and system for correcting air mass flow
  • Method and system for correcting air mass flow
  • Method and system for correcting air mass flow

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein...

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Abstract

The invention discloses a method for correcting air mass flow. The method includes: acquiring the air mass flow of the flow measuring pipeline of a target engine; searching for calibration mass flow,corresponding to the air mass flow, in a preset air compressor MAP; judging whether the difference ratio between the air mass flow and the calibration mass flow is larger than a preset different ratiothreshold or not; if so, determining a target calibration coefficient corresponding to the air mass flow and the calibration mass flow, and correcting the air mass flow according to the target calibration coefficient. When the method is used to perform correction at a certain time interval, the acquired air mass flow is corrected according to the preset air compressor MAP, and the problem that anexisting air mass flow measuring method is inaccurate in measuring due to the fact that a flow sensor is sensitive to pipelines and environments and the arrangement and use of the air inlet pipelinesin an automotive original equipment manufacturer generate measuring drifting.

Description

technical field [0001] The invention relates to the technical field of calibration, in particular to a method and system for correcting intake air mass flow. Background technique [0002] With the strengthening of environmental governance, the requirements for exhaust emissions are getting higher and higher. In order to make the exhaust emission standards meet the requirements, it is necessary to accurately measure the intake mass flow of fresh air in the engine flow measurement pipeline. According to the fresh air Intake mass flow rate and fuel quantity control combustion products to meet emission requirements. In the prior art, a flow sensor is installed at the intake port of the engine, and the intake mass flow rate of fresh air at the intake port is measured according to the flow sensor. [0003] The inventor researched the existing intake air mass flow measurement process and found that in the existing intake air mass flow measurement method, due to the sensitivity of t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/04G01F1/76
CPCG01F1/76G01M15/042
Inventor 代子阳张玉杰王意宝侯晓良姚旺
Owner WEICHAI POWER CO LTD
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