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Engine combustion isometric degree calculation method and device and engine combustion analyzer

An engine and capacity technology, used in jet engine testing, gas turbine engine testing, etc.

Active Publication Date: 2020-04-14
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical engineering applications, due to the difficulty in quantifying isovolumicity, the development of a combustion analysis system based on isovolumetric feedback calculations is challenging

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  • Engine combustion isometric degree calculation method and device and engine combustion analyzer
  • Engine combustion isometric degree calculation method and device and engine combustion analyzer
  • Engine combustion isometric degree calculation method and device and engine combustion analyzer

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Embodiment Construction

[0055]Existing engine combustion analyzers mainly detect cylinder pressure parameters, combustion phase parameters, knock index parameters, and corresponding cylinder pressure curves, heat release curves, etc., and lack a device for calculating combustion isovolume. The present invention provides a calculation method of combustion isovolumism and output display, the originality provides the quantification method of combustion isovolume, provides direct and objective reference data for combustion analysis and diagnosis in actual engineering, and at the same time provides The automatic calibration of the engine provides reference data.

[0056] 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 p...

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Abstract

The invention discloses an engine combustion isometric degree calculation method and device and an engine combustion analyzer, and belongs to the technical field of engines. The method comprises the steps that the total heat release amount Qn of an actual combustion cycle is equally divided into multiple sections of constant-volume heat release at different crankshaft corners, and the heat releasesections are considered to be adiabatic processes; and the actual combustion cycle is divided into multiple sections of Otto cycles, the average heat efficiency of the divided multiple sections of Otto cycles is compared with the theoretical heat efficiency of the combustion cycle of the engine, and the isometric degree of the actual combustion cycle is obtained and output. According to the invention, the isometric degree of the combustion cycle of the engine can be displayed in real time, direct and objective reference data is provided for combustion analysis and diagnosis in actual engineering, and reference data is provided for automatic calibration work of the engine.

Description

technical field [0001] The invention relates to the technical field of engines, and more specifically, relates to a method and device for calculating the equal volume of combustion of an engine and an engine combustion analyzer. Background technique [0002] Constant volume combustion, also known as constant volume combustion, refers to the combustion of fuel and oxygen under the condition that the volume remains constant. In the actual combustion cycle, the proportion of isovolumic combustion in the entire combustion process is the isovolumetric degree of combustion. The higher the isovolumetric degree of combustion, the closer the entire combustion process is to the top dead center, so the thermal efficiency of the cycle is higher. The better the engine's fuel economy. Therefore, taking the isovolume as a reference parameter has very important guiding significance for indicating the quality of cycle combustion and judging the ignition timing. However, in practical engine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/14
CPCG01M15/14
Inventor 张福缘
Owner SAIC MOTOR
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