Future Relevance of IC engines for transportation and Power-on-Demand. Characteristic performance parameters, operating maps and duty cycles. Thermodynamic cycles and energetic optimization. In-cylinder flows, convective and radiative heat transfer, combustion modes, boosting and simulation methods. Hybrid powertrains, decentralized power/heat cogeneration and use of renewable/e-fuels.
Lernziel
The students get familiar with operating characteristics and efficiency maximization methods of IC engines for propulsion and decentralized electricity (and heat) generation. To this end, they learn about simulation methods and related experimental techniques for performance assessment in a combination of lectures and exercises.
Inhalt
This lecture aims at introducing the students to the working principles and efficiency optimization methods for Internal Combustion (IC) engines which are expected to continue to play a very important role in transportation (long-haul heavy duty, marine) and decentralized combined heat and power generation. Following an overview of different applications and powertrains, the course will focus on the following topics: First, a generic overview of the history of IC-Engines is given, and the basic dimensions and specific engine-relevant terminology are introduced. Next, operating maps for different duty cycles are discussed, highlighting the benefits of individual powertrain configurations for different usage scenarios. The high-pressure thermodynamic process and combustion-induced heat release are analyzed in detail and the design of the combustion processes is discussed in view of further optimization of the energy conversion efficiency. The concept of boosting, its challenges and potential are also presented. In addition, flow field characteristics, convective and radiative heat transfer and combustion modes (Otto, Diesel and “multi-mode” cycles) will be discussed along with possible simulation methods. The course consists of lectures combined with exercises. In addition, several invited guest talks will be held by representatives from Swiss industrial companies active in this field. Provided the pandemic measures allow, visits to different engine test facilities are further envisioned.
Literatur
J. Heywood, Internal Combustion Engine Fundamentals, McGraw-Hill
Voraussetzungen / Besonderes
This course provides background for the course 151-0254-00L “Environmental Aspects of Future Mobility” held in the Spring Semester, where the focus is on emission formation and minimization, exhaust gas after treatment systems and potentials of future synthetic/e-fuels in IC engines; all given in the broader context of a future mobility/transportation options (battery electric, hybrids, fuel cells etc.) and transformation pathways towards sustainability.
Kompetenzen
Fachspezifische Kompetenzen
Konzepte und Theorien
geprüft
Verfahren und Technologien
geprüft
Methodenspezifische Kompetenzen
Analytische Kompetenzen
geprüft
Leistungskontrolle
Information zur Leistungskontrolle (gültig bis die Lerneinheit neu gelesen wird)
Die Leistungskontrolle wird in jeder Session angeboten. Die Repetition ist ohne erneute Belegung der Lerneinheit möglich.
Prüfungsmodus
mündlich 30 Minuten
Zusatzinformation zum Prüfungsmodus
In addition to the final oral examination, there is one compulsory continuous performance assessment with a pass/fail criteria. This consists of laboratory, computer and other exercises plus an excursion (in total six), distributed as evenly as possible over the semester). Four of these must be completed (pass/fail assessment) to pass the continuous performance assessment. If the compulsory continuous performance assessment is not passed, the exam cannot be taken.
Diese Angaben können noch zu Semesterbeginn aktualisiert werden; verbindlich sind die Angaben auf dem Prüfungsplan.
Lernmaterialien
Keine öffentlichen Lernmaterialien verfügbar.
Es werden nur die öffentlichen Lernmaterialien aufgeführt.
Gruppen
Keine Informationen zu Gruppen vorhanden.
Einschränkungen
Keine zusätzlichen Belegungseinschränkungen vorhanden.
Leistungskontrolle als Semesterkurs