Thermodynamic Study of the Working Cycle of a Direct Injection Compression Ignition Engine

Fygueroa, Simón; Villamar, Carlos; Fygueroa, Olga

doi:10.5772/50028

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…де p, T -тиск та температура в циліндрі; Vоб'єм газу в циліндрі, який визначається положенням x поршня від верхньої мертвої точки [22]; R -газова стала; CV, Cp -тепломісткості при постійному тиску та об'ємі. Тоді, якщо в рівняннях (1) і (2) взяти похідну за часом dτ, то шляхом подальших перетворень можна отримати математичну модель досліджуваного процесу -систему диференціальних рівнянь 1-го порядку, дозволених щодо похідної, як [23,24]:…”

Section: математична модель процесу в циліндрі при холодному прокручу...unclassified

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Khrulev,

Saraiev,

Saraieva

2024

VEIT

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Problem: The study examines the thermogasdynamic process within an internal combustion engine cylinder during cold cranking mode while measuring compression. Analysis of various models and comparison of known data revealed unresolved challenges in constructing mathematical models of the engine operating cycle. The vast majority of practical data and recommendations for compression measurement in a cylinder are based on empirical knowledge, numerous experiments, and tests. Consequently, there arises a need for computational models of the compression measurement process and their theoretical justification, particularly in cases where engine damage occurs during hydrolock in a cylinder. Methodology. To address the identified issues, a mathematical model of the thermogasdynamic process within the cylinder during cold cranking while measuring compression was developed. Originality. Unlike existing models, this model describes the processes in the cylinder step by step, considering the real nature of intake-exhaust processes, air leakage through part interfaces, and heat exchange with the walls. Through modeling, the main patterns of compression changes depending on the modes and the nature of damage to associated parts of the valve mechanism and the cylinder-piston group were identified, including deformation of the connecting rod during hydraulic lock due to liquid entering the cylinder. Practical value. Based on the study results, it was concluded that the model's properties make it effectively applicable in diagnosing and monitoring the technical condition of automotive engines during operation.

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Section: математична модель процесу в циліндрі при холодному прокручу...unclassified

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Khrulev,

Saraiev,

Saraieva

2024

VEIT

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Improvement of Piston Engines Operation as Distributed Generation to Reduce Carbon Emissions

Roque¹,

Chowdhury

2018

2018 IEEE PES/IAS PowerAfrica

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Modeling of thermodynamic processes in internal combustion engine cylinder during cranking in compression measurement tests

Khrulev,

Saraiev,

Saraieva

et al. 2024

Combustion Engines

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The thermodynamics of in-cylinder processes of the internal combustion engine in cranking mode when measuring compression were examined. Analysis of various theoretical models and comparison of known data showed that the problems of constructing mathematical models of the engine operating cycle remain unresolved. The vast majority of practical data and recommendations for measuring cylinder compression are based on empirical knowledge, numerous experiments and tests. In accordance with this, there is a need for computational models of the compression measurement process and their theoretical justification. To solve the identified problems, a mathematical model of the thermodynamic processes in the cylinder was developed. Unlike existing ones, the model describes the processes in the cylinder step by step, taking into account the real nature of the intake-exhaust processes, air leakage through the interfaces of parts and heat exchange with the walls. Using modeling, the main patterns of changes in compression depending on the modes, the nature of damage to the associated parts of the valve mechanism and cylinder-piston group, the amount of leakage and engine temperature were found. Based on the results of the study, the properties of the model which make its use effective in diagnosing and monitoring the technical condition of engines in operation were concluded.

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Thermodynamic Study of the Working Cycle of a Direct Injection Compression Ignition Engine

Cited by 3 publications

References 22 publications

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Improvement of Piston Engines Operation as Distributed Generation to Reduce Carbon Emissions

Modeling of thermodynamic processes in internal combustion engine cylinder during cranking in compression measurement tests

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