Internal Combustion Engines (LFV)

Areas of activity

Thermodynamic and optical combustion analysis

The LFV has the ability to carry out detailed thermodynamic analyses by means of modern in-cylinder pressure measurement systems, and precise fuel consumption and emission measuring systems. An important tool here is the “Miraculix”, a pressure curve analysis tool which has been developed in-house to compile energy loss distributions. Moreover, optical investigations into mixture formation and combustion are conducted with the aid of high-speed endoscopy.
The optical measurement of sprays in a pressure chamber (up to 50 bar) supplements the investigations on the engine test stands. Just as valuable is the possibility to perform optical analysis of ignition sparks in a heated flow chamber.

Simulation

To complement the experimental investigations, charge cycle, charge movement and combustion are simulated with the aid of the well-known programme GT-Power.  

Mechanical engineering workshop

The laboratory has its own mechanical engineering workshop to support the projects carried out there.

Laboratory exercises and projects

Laboratory exercises

Bachelor

  1. Emissions of a petrol engine (Otto cycle engine): cold start and lambda variation – raw emissions and exhaust gas post-treatment
  2. Efficiency/losses: speed, load and ignition timing variation
  3. Charge cycle for a petrol engine: scavenging and internal residual gas variation
  4. Emissions and noise of the diesel engine: variation of injection timing, exhaust gas recirculation rate and pilot injection.

Master

  1. Thermodynamic analysis on the whole engine
  2. Optical investigations on a single cylinder engine.

Student projects

The work undertaken in the 4th and 6th semesters includes the project work 1 and 2. Projects are offered on a regular basis and are supervised by the LFV:

  • Design and manufacture of a pressure chamber for the optical analysis of injection jets
  • Combustion analysis and charge cycle simulation on a thermodynamic single cylinder engine
  • Further development of software for the thermodynamic analysis of in-cylinder pressure measurements
  • Projects in collaboration with the Rennstall Esslingen racing car project.

 

Laboratory equipment

  • 3 engine test stands with asynchronous machines

Power classes
350 kW/800 Nm
220 kW/525 Nm
150 kW/340 Nm

  • Exhaust measurement

2 HORIBA Mexa 7170DEGR for exhaust emission components CO, CO2, NO, NO2, N2O,
Total HC, CH4 and O2 as well as EGR rate

  • Videoscopy

Photron SA-X2 high-speed camera; Storz endoscopes

  • Optical injection chamber for pressures up to 50 bar
  • Fuel consumption measurement

AVL FuelExact, AVL 733

  • Particle measurement

AVL Smoke Meter 415S, MS4 Pegasor Particle Sensor, AVL Opacimeter 439
In-cylinder pressure measurement
2 FEV FEVIS (16 channels)
1 FEV CAS (8 channels)
Sensor system Kistler/AVL

  • Blow by measurement

AVL 442

  • Conditioning equipment

Intake air, charge air, cooling water and engine oil

 

 

Research

The Laboratory for Internal Combustion Engines is dedicated to the combustion process. The research it undertakes focuses on petrol engines. The primary objective is to increase the ability for charge dilution in homogeneous operation. A large variety of innovative ignition and injection systems and measures to increase the charge movement were and are being investigated to achieve this goal.
Since 2008, these research activities in particular have formed the basis for a large number of conference papers and publications, doctoral theses, Master, Bachelor and Diplom theses. A complete list with all the titles is available on the German page.

Apply for winter semester 2020/21!

Applications open April 15th 2020

More information