Aim
The objective of the course is to provide a thorough understanding of the design of a modern internal combustion engine and advanced engine concepts .

Knowledge and understanding
For a passing grade the student must

be able to provide an individual written account for how mass and gas forces cause vibrations in a combustion engine and how to reduce them with multiple cylinders and / or balance shafts
• be able to provide an individual written account for the design of the gas exchange system on a modern combustion engine in terms of the number and placement of valves and variable / fixed valve timing

• be able to provide an individual written account for modern fuel injection systems and assess the strengths and weaknesses of the main alternatives

• be able to provide an individual written account for alternative engine concepts such as HCCI and PPC in relation to conventional concepts

Skills and abilities
For a passing grade the student must

be able to use commercial computer software for gas exchange simulation of combustion engines
• be able to perform heat release analysis based on cylinder pressure measurements

• be able to, groupwise with supervision, conduct measurement of cylinder pressure as function of crank angle on a laboratory combustion engine

Judgement and approach
For a passing grade the student must

• actively participate in discussions of relevant problems for the subject

• be able to present written analysis of combustion engine measurements and/or simulations

Contents
The course starts with an in-cylinder pressure analysis for heat release evaluation. Then the engine mechanical design and force transfer from piston to output shaft is analysed. The balancing of multi-cylinder engines is presented. The gas exchange system is presented in some detail. The design of valves and combustion chambers in four stroke engines are discussed. Gas exchange in two stroke engines as well as supercharging are also presented. Carburettors, port fuel injection and direct fuel injection of gasoline the three types of fuel preparation of SI engines, are described with emphasis on direct fuel injection. New types of internal combustion engine such as HCCI and PPC are explained. Measuring techniques for the analyzing of engines as well as engine control are presented. Hybrid vehicle systems and Waste Heat Recovery are explained. Finally an introduction to engine modelling is given.

Laboratory work will be given in which PPC is analyzed. Computer projects will also be conducted with the purpose of making the students identifying engine components as well as running engines virtually.

Literature
Johansson, B, Förbränningsmotorer ("Internal Combustion Engines"), Avd för Förbränningsmotorer, LTH, and material handed out by the division.