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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">madi</journal-id><journal-title-group><journal-title xml:lang="ru">Автомобиль. Дорога. Инфраструктура. = Avtomobil'. Doroga. Infrastruktura.</journal-title><trans-title-group xml:lang="en"><trans-title>Avtomobil'. Doroga. Infrastruktura.</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2409-7217</issn><publisher><publisher-name>МАДИ</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">madi-1362</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>2.4.7. Турбомашины и поршневые двигатели</subject></subj-group></article-categories><title-group><article-title>Влияние уменьшения размеров форсунки на показатели газодизеля</article-title><trans-title-group xml:lang="en"><trans-title>The effect of reducing injector size on dual-fuel engine performance</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Максимов</surname><given-names>Игорь Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Maksimov</surname><given-names>Igor V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p></bio><bio xml:lang="en"><p>postgraduate</p></bio><email xlink:type="simple">igor_mak97@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Синявский</surname><given-names>Владимир Викторович</given-names></name><name name-style="western" xml:lang="en"><surname>Sinyavskiy</surname><given-names>Vladimir V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, доц.</p></bio><bio xml:lang="en"><p>Candidate of Sciences (Technical), associate professor</p></bio><email xlink:type="simple">sinvlad@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">МАДИ<country>Россия</country></aff><aff xml:lang="en">MADI<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>09</day><month>09</month><year>2024</year></pub-date><volume>0</volume><issue>3(41)</issue><fpage>1</fpage><lpage>1</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Максимов И.В., Синявский В.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Максимов И.В., Синявский В.В.</copyright-holder><copyright-holder xml:lang="en">Maksimov I.V., Sinyavskiy V.V.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.adi-madi.ru/madi/article/view/1362">https://www.adi-madi.ru/madi/article/view/1362</self-uri><abstract><p>Возможность уменьшения запальной порции дизельного топлива современного газодизеля ограничена перегревом форсунки в связи с ухудшением ее охлаждения топливом. При уменьшении размеров форсунки ее охлаждение улучшается. Проанализирована возможность применения на газодизеле грузового автомобиля форсунки от дизеля легкового автомобиля с целью снижения запальной порции от 15 до 6%. Так как работа с уменьшенной форсункой с полной нагрузкой в дизельном режиме, невозможна, в среде AVL FIRE проводились расчеты газодизеля с камерами сгорания как дизеля, так и газового двигателя для штатной и малой форсунок, двух величин запальной порции дизельного топлива, а также полной и частичной нагрузок. При уменьшении запальной порции дизельного топлива практически в три раза замена дизельной камеры сгорания на газовую омегаобразную и уменьшение форсунки привело к повышению индикаторного КПД на 2% на полной и 4% – на 25% нагрузки. Выбросы оксидов азота увеличилась до 3,5 раз, но не превысили 93 ppm. Выбросы несгоревших углеводородов изменились несущественно.</p></abstract><trans-abstract xml:lang="en"><p>The possibility of reducing the pilot portion of diesel fuel in a modern dual-fuel engine is limited by overheating of the injector due to its poor cooling by the fuel. Reducing the size of the nozzle improves its cooling. The possibility of using a smaller injector from a passenger car on a truck dual-fuel engine was analyzed in order to reduce the pilot portion of diesel fuel from 15% to 6%. Since engine operation at full load in diesel mode with smaller injector is impossible, we fulfilled modeling in the AVL FIRE software of a dual-fuel engine operation with both diesel and gas type combustion chambers, large and small injectors, two pilot portions of diesel fuel, at full and partial loads. When the pilot portion of diesel fuel was reduced by almost three times, replacing the diesel combustion chamber with an omega-shaped one and using the smaller injector led to an increase in effective efficiency by 2% at full load and 4% at 25% load. Emissions of nitrogen oxides increased up to 3.5 times, but did not exceed 93 ppm. Emissions of unburned hydrocarbons changed insignificantly.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>газодизель</kwd><kwd>запальная порция дизельного топлива</kwd><kwd>микровпрыск дизельного топлива</kwd><kwd>камера сгорания газового двигателя</kwd><kwd>моделирование в AVL FIRE</kwd></kwd-group><kwd-group xml:lang="en"><kwd>dual-fuel engine</kwd><kwd>pilot portion of diesel fuel</kwd><kwd>micro-injection of diesel fuel</kwd><kwd>gas engine combustion chamber</kwd><kwd>modeling in AVL FIRE</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Method of conversion of high- and middle-speed diesel engines into gas diesel engines / M. G. Shatrov, V. V. Sinyavski, A. Yu. Dunin [et al.] // Facta Universitatis. 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