Naslov
Influence of turbulent jet ignition and variable valve lift technology on the performance of spark ignition engine

Autori
Preksavec, Luka

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, diplomski rad, preddiplomski

Fakultet
Fakultet strojarstva i brodogradnje

Mjesto
Zagreb

Datum
01.03

Godina
2023

Stranica
41

Mentor
Sjerić, Momir

Ključne riječi
Spark Ignition Engine ; Turbulent Jet Ignition ; Prechamber Ignition ; Variable Valve Lift ; Engine simulations ; GT-Power

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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