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Mass flow sensor output correction method, device, controller and medium

A mass flow and sensor technology, applied in the field of electronic control, can solve problems such as inaccurate measurement and drift of intake mass flow

Active Publication Date: 2021-05-18
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the mass flow sensor will be polluted by particles, salt, water or oil, etc., the measured intake air mass flow will drift, resulting in inaccurate measurement

Method used

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  • Mass flow sensor output correction method, device, controller and medium
  • Mass flow sensor output correction method, device, controller and medium
  • Mass flow sensor output correction method, device, controller and medium

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Embodiment Construction

[0022] The specific embodiments of the present application will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiments.

[0023] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0024] In addition, the terms "first" and "second", etc. are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally als...

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Abstract

The application discloses a mass flow sensor output correction method, device, controller and storage medium. The method: set the operating point, and need to store the preset mass flow value corresponding to the correction factor; obtain the The intake air mass flow value output by the mass flow sensor, and the standard mass flow value calculated according to the preset intake air model; the first correction factor is calculated according to the intake air mass flow value and the standard mass flow value; according to each working condition The first correction factor and intake air mass flow value under the point, the second correction factor corresponding to each preset mass flow value is estimated by linear interpolation method; according to the second correction factor corresponding to each preset mass flow value, through The linear interpolation method obtains the correction factor for each mass flow sensor output value in the current driving cycle. This solution can monitor the drift state of the mass flow sensor in real time, and perform deviation compensation on the signal of the mass flow sensor.

Description

technical field [0001] The present application relates to the technical field of electronic control, in particular to a method, device, controller and storage medium for correcting the output of a mass flow sensor. 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 and fuel quantity control combustion products to meet emission requirements. In the prior art, a mass 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 mass flow sensor. [0003] Because the mass flow sensor will be polluted by particles, salt, water or oil, etc., the measured intake air mass ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00G01F15/00
CPCG01F15/00G01F25/00
Inventor 秦翠萍李云霞许帅徐卫亮董玲华
Owner WEICHAI POWER CO LTD