prikaz prve stranice dokumenta Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine
Embargo period 2025-03-01
undergraduate thesis
Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:033636
Preksavec, Luka
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Preksavec, L. (2023). Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:033636

Preksavec, Luka. "Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:033636

Preksavec, Luka. "Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:033636

Preksavec, L. (2023). 'Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 14 October 2024, https://urn.nsk.hr/urn:nbn:hr:235:033636

Preksavec L. Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 October 14] Available at: https://urn.nsk.hr/urn:nbn:hr:235:033636

L. Preksavec, "Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:033636

Metadata
TitleInfluence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine
Title (croatian)Utjecaj primjene pretkomore i varijabilnog otvaranja ventila na značajke rada Ottovog motora
AuthorLuka Preksavec
MentorMomir Sjerić (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-03-01, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
Turbulent Jet Ignition and Variable Valve Lift are relatively new technologies for improving the performance of internal combustion engines. Over the last years they have been a topic for many scientific researches. In this paper, the claimed performance gains are tested using a commercial simulation software GT-PowerTM. The benefits of those technologies are compared against the base engine model, created and calibrated using the experimental data from the test bench. The TJI is evaluated by modifying the base engine model, where assumed benefits of using the system will be imposed. Firstly, brake torque and power are simulated and compared to the base model. Following that, the compression ratio of the engine is increased to further examine the usage of the prechamber combustion. The influence on the exhaust temperatures is also inspected and the found improvements are exploited by increasing the access air ratio. VVL is examined by modifying the base model intake and exhaust valve profiles for different steady state points. The potential improvements in brake torque and power are examined at wide-open throttle conditions and again compared to the base model. For part load conditions, the reducement of pumping losses with the increasement of expansion work is targeted.
Abstract (croatian)
Izgaranje u pretkomori i varijabilno podizanje ventila relativno su nove tehnologije za poboljšanje značajki motora s unutarnjim izgaranjem. Proteklih godina bile su predmet istraživanja mnogih znanstvenih radova. Pretpostavke o poboljšanju značajki rada motora biti će ispitane koristeći komercijalni programski paket za simulacije GT-PowerTM. Prednosti spomenutih tehnologija uspoređene su sa osnovnim simulacijskim modelom motora koji je izrađen i kalibriran prema podacima s ispitne stanice. Izgaranje u pretkomori ispitano je izmjenom početnog modela, gdje su pretpostavke o uporabi pretkomore određene parametrima. Najprije su ispitani i uspoređeni efektivni moment i snaga koji su dobiveni simulacijama početnog i izmjenjenog modela. Nakon toga, kompresijski omjer motora biti će uvećan kako bi se nadalje promatrali učinci korištenja pretkomore. Utjecaj na temperaturu ispušnih plinova također je promatran te su poboljšanja primjenjena povećanjem pretička zraka. Varijabilno podizanje ventila ispitano je izmjenom profila podizaja usisnog i ispušnog ventila za različite radne točke. Poboljšanje iznosa efektivnog momenta i snage ispitano je u uvjetima punog opterećenja te također uspoređeno s osnovnim modelom. Za uvjete djelomičnog opterećenja cilj je smanjenje gibitaka tijekom izmjene radnog medija te povećanje rada prilikom ekspanzije.
Keywords
Keywords (croatian)
Languageenglish
URN:NBNurn:nbn:hr:235:033636
Study programmeTitle: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering
Course: Design
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2025-03-01
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Created on2023-02-23 11:01:42