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THE SUBSTANTIATION OF THE SELECTION OF THE FORM OF THE COMBUSTION CHAMBER FOR USING CATALYTIC COATING ON THE PISTON SURFACE

THE SUBSTANTIATION OF THE SELECTION OF THE FORM OF THE COMBUSTION CHAMBER FOR USING CATALYTIC COATING ON THE PISTON SURFACE

Abstract

The analysis of the existing forms of combustion chambers for diesels with direct injection of fuel with levels of pressure of fuel from 100 MPa to 180 MPa is carried out. The main requirements and peculiarities regarding the influence of the shape of the combustion chamber on the processes of mixture formation, combustion, and the kinetics of the course of chemical reactions during the deposition of a catalytic coating layer on the surface of the combustion chamber of a piston are considered. The most common designs of combustion chamber shapes have been analyzed and reasonable recommendations have been provided to increase the surface area of the chambers to increase the formation of active particles, reduce the energy of fuel activation, accelerate chain reactions, and reduce the heterogeneity of combustion in the near-wall zones. It is advisable to increase the surface area of the chamber in the piston. Variants of constructions of forms of combustion chambers when using a catalytic covering on the surface of the piston which provide a qualitative mixing in case of increase in the surface of the camera for two levels of maximum pressure of injection of fuel have been suggested.

Проведений аналіз форм камер згоряння дизелів з безпосереднім впорскуванням палива для рівнів максимального тиску впорскування палива від 100 МПа до 180 МПа. Розглянуті основні вимоги та особливості впливу форми камери згоряння на процеси сумішоутворення та кінетики протікання хімічних реакцій при нанесенні шару каталітичного покриття на поверхню камери згоряння в поршні. Проаналізовані найпоширеніші форми камер згоряння та дані рекомендації зі збільшення утворення активних частинок, зниження енергії активації палива, а також зменшення неоднорідності горіння палива в пристінкових зонах. Для двох рівнів максимального тиску впорскування палива запропоновані варіанти конструкцій форм камер згоряння, що дозволяють збільшити поверхню камери при використанні каталітичного покриття на поверхні поршня.

Keywords

форма камери згоряння, сумішоутворення, токсичні речовини, toxic substances, catalytic coating, in-cylinder neutralization, mixture formation, form of combustion chamber, поршень, turbulization of a charge, piston, каталітичне покриття, внутрішньоциліндровий каталіз, турбулізація заряду, diesel engine, дизель

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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