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A method for determining the rotational speed of a vgt supercharger

A determination method, supercharger technology, applied in machine/engine, design optimization/simulation, combustion engine, etc., to achieve accurate calculation results

Active Publication Date: 2022-07-15
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has certain defects, including the completeness of the MAP table data and the accuracy of the speed of the supercharger under dynamic conditions.

Method used

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  • A method for determining the rotational speed of a vgt supercharger
  • A method for determining the rotational speed of a vgt supercharger
  • A method for determining the rotational speed of a vgt supercharger

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Embodiment Construction

[0038] The present invention will be further described below with reference to the specific drawings and embodiments.

[0039] like figure 1 , figure 2 shown:

[0040] The method for determining the rotational speed of a VGT supercharger provided by the present invention, such as figure 1 shown, including the following steps:

[0041] S1: analyze the state of the turbocharger, and determine whether the turbocharger rotational speed n is determined by a dynamic calculation method or a steady-state calculation method according to the state of the turbocharger;

[0042] S2: If the state of the turbocharger is stable, the speed n of the turbocharger is determined by the steady-state calculation method;

[0043] S3: Otherwise, determine the turbocharger speed n by dynamic calculation;

[0044] like figure 2 As shown, the steady-state calculation method includes the following steps:

[0045] S210: Calculate the pressure ratio Π of the compressor according to the collected c...

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Abstract

The invention relates to the technical field of engines, in particular to a method for determining the rotational speed of a VGT supercharger. The method for determining the rotational speed of the VGT supercharger specifically includes the following steps: analyzing the state of the turbocharger, and determining whether the rotational speed n of the turbocharger is determined by a dynamic calculation method or a steady-state calculation method according to the state of the turbocharger ; If the state of the turbocharger is stable, the turbocharger speed n is determined by the steady-state calculation method; otherwise, the turbocharger speed n is determined by the dynamic calculation method; the steady-state calculation unit and the dynamic calculation unit can be integrated The calculation result of , realizes the final output of the turbocharger speed, which makes the calculation of the turbocharger speed n more accurate.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method for determining the rotational speed of a VGT supercharger. Background technique [0002] The speed of the supercharger is an important factor affecting the performance and life of the supercharger. Usually, since the speed of the supercharger is unknown, to prevent the supercharger from overspeeding, a large safety margin can only be set aside by means of calibration, which will sacrifice engine performance. If an actual rotational speed sensor is installed, rearrangement is required and is expensive. [0003] One solution is to determine the turbine speed by looking up a table according to the intake mass flow rate, the compressor pressure ratio and the supercharger opening. However, this method has certain shortcomings, including the completeness of the MAP table data and the accuracy of the speed of the supercharger under dynamic conditions. SUMMARY OF THE INVENT...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20F02B37/00F02C6/12
CPCF02B37/00F02C6/12Y02T10/12
Inventor 李子竞周鹏张建锐佀庆涛
Owner FAW JIEFANG AUTOMOTIVE CO
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