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Engine combustion isovolume calculation method, device and engine combustion analyzer

An engine and volumetric technology, applied in jet engine testing, gas turbine engine testing, etc.

Active Publication Date: 2021-11-16
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 isovolume calculation method, device and engine combustion analyzer
  • Engine combustion isovolume calculation method, device and engine combustion analyzer
  • Engine combustion isovolume calculation method, 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 a method, device and engine combustion analyzer for calculating the equal volume of combustion of an engine, belonging to the technical field of engines. The method includes calculating the total heat release Q of an actual combustion cycle n Evenly divided into multi-stage equal-volume heat release at different crank angles, and each heat release stage is considered as an adiabatic process. In this way, an actual combustion cycle is divided into multi-stage Otto cycles, and the average thermal efficiency ratio of the divided multi-stage Otto cycles is The theoretical thermal efficiency of the combustion cycle of the engine is obtained and outputted from the isovolumic value of the actual combustion cycle. The invention can display the isovolume of the engine combustion cycle in real time, provides direct and objective reference data for combustion analysis and diagnosis in actual engineering, and provides reference data for the automatic calibration of the engine at the same time.

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 Patents(China)
IPC IPC(8): G01M15/14
CPCG01M15/14
Inventor 张福缘
Owner SAIC MOTOR
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