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.
CN111006872BActive Publication Date: 2021-11-16SAIC MOTOR
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
SAIC MOTOR
Publication Date
2021-11-16

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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.
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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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