Research Associations

 

The named scientific works are funded by the following establishments:

Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)
Forschungsvereinigung Antriebstechnik e.V. (FVA)
Arbeitsgemeinschaft industrieller Forschungsvereinigungen „Otto von Guericke“ e.V. (AiF)

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Selected scientific works:

 
 

Turbocharger damping

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Title

Acoustic transmission loss in turbochargers

Funding Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)
Projectnumber FVV 1214
Description

Within the project, the damping behavior of turbocharger on the engine’s intake and exhaust system are analyzed. The work includes a deep theoretical analysis combined with experimental investigations on a self-built turbocharger test bench. By means of the gained knowledge, models for 1-D simulation tools are created and integrated.

Period

02/2016 - 01/2018

 
 

 
 

Fuel in Oil I&II

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Title

Fuel in Oil I Project G

Funding Bundesministerium für Wirtschaft und Energie (BMWi)
Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF)
Projectnumber FVV 1102
Description

The objective of the research cluster “Fuel in Oil“ was to investigate and quantify the fuel oil interaction for diesel engine with different post-injection strategies, as used for particulate filter or NOx adsorption catalyst regeneration, which leads to oil dilution. In addition to fundamental experiments and engine tests, numerous numeric simulations have been done. As a result, a model based simulation tool was developed that enables oil dilution assessment based on simple engine and operation parameters.

Period 11/2011 - 02/2015

Title

Fuel in Oil II – Sources of oil in the combustion chamber of gasoline engines

Funding Bundesministerium für Wirtschaft und Energie (BMWi)
Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF)
Projectnumber

FVV 1225

Description

On the basis of insights in fuel oil interaction at diesel engines that are found in the research project “Fuel in Oil”, possible sources of oil in the combustion chamber of direct injecting gasoline engines should be identified and quantified. In addition to the development of measuring technology, basic knowledge for numerical simulation of observed phenomena should be generated. The objective of the project is to identify the local oil concentration in combustion chamber and draw conclusions about irregular combustion and increased exhaust emissions.

Period

04/2016 - 03/2018

 
 

 
 

Exhaust fuel injection

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Title Exhaust Fuel Injection
Funding Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)
Projectnumber FVV 1191
Description

The target of the project “exhaust fuel injection” is the alignment of simulation and measurement of the HC concentration upstream catalyst when injecting fuel into the exhaust system. The task is to find both suitable simulation and measurement techniques to correctly measure and simulate the radial and axial HC distribution upstream catalyst. One part of the project is also to design and to assemble an exhaust gas system, with which the selected measurements can be performed.

Period 03/2015 - 02/2017

 
 

 
 

Fuel characteristic numbers I&II

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Title Fuel characteristic numbers I&II
Funding

Fachagentur Nachwachsende Rohstoffe e.V. (FNR)
Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)

Projectnumber FVV 1059/1180
Description

The main purpose of this project is to develop a proposal for an industrially applicable procedure for the characterization of a fuels's pre-ignition tendency. To ensure the industrial applicability of this procedure, an existing measurement methodology will be carried over to the CFR test engine. This measurement methodology was developed in the predecessor project “Fuel characteristic numbers biofuels”, based on a modern series-type single cylinder research engine. Investigations on both experimental facilities will be conducted with more than 30 different fuels. In order to gain a better understanding of the physical and chemical root causes of pre-ignition, numerical simulations concernig the injection pattern and mixture formation as well as reaction chemistry will be performed.

Furthermore, the pre-ignition characteristics of a yet undefined selection of fuels will be analyzed on a multi-cylinder series production engine and will be compared with the results from the single cylinder engine investigations.

Period

11/2014 - 10/2017

 
 

 
 

Engine noise components I&II

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Title

Engine noise components I

Funding Bundesministerium für Wirtschaft und Energie (BMWi)
Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF)
Projectnumber FVV 1092
Description

Within the project "Engine Noise Components", an analysis tool is developed which is capable of separating overall engine noises into audible tonal noise, flow noise and impulsive noise components. The analysis tool is also capable of synthesizing new overall engine noises with different weightings for the separated engine noises components. The perceived annoyance of the three noise groups (tonal noise, flow noise, impulsive noise) is calculated automatically.

Input for the newly developed procedure is a one channel overall engine noise recording, measured in a (semi-)anechoic test chamber or optionally at a vehicle with open bonnet. The methodology uses only little extra metadata and no additional measurement channels to separate and evaluate the noise signal. Therefore, the methodology can easily be applied to new engine sound recordings.

Period

03/2012 - 02/2014

 
Title

Engine noise components II

Funding

Bundesministerium für Wirtschaft und Energie (BMWi)
Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF)

Projectnumber

FVV 1207

Description

The purpose of the research project is to separate engine noise into impulsive and tonal noises and to allocate those to the emitting engine components respectively processes.The final software will allow the user to listen to the separated sound files and to synthesize them to a new target sound. Finally, the separated noises will be rated according to their annoyance level.

Period

12/2015 - 11/2017

 
 

 
 

Potential of valve train variabilities on gas exchange of Diesel engines I&II

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Title Variable Effective Compression Ratio in Diesel Engines I
Funding Forschungsvereinigungen Antriebstechnik (FVA)
Projectnumber FVV 1027
Description

In this research project the potentials of a variable valve train have been investigated by means of simulation and experiments. During the investigation, the focus was on the exhaust temperature management with a special emphasis on the exhaust heating potentials, impact on emissions, control of swirl motion, and the optimization of the transient behavior. First of all, 1-D simulations have been used to limit the number of possible combinations of variable valve train configurations.

Furthermore, experimental investigations on a single cylinder as well as full-size laboratory engine plus 3-D CFD simulations of the cylinder gas motion and combustion have been carried-out.

Period 01/2010 - 12/2012

 
Title Variable Effective Compression Ratio in Diesel Engines II
Funding Bundesministerium für Wirtschaft und Energie (BMWi)
Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF)
Projectnumber FVV 1171
Description Carry over from the previous research project "Variable Effective Compression Ratio in Diesel Engines" to a full-size engine to obtain knowledge of different variable valve train functionalities on several engine operation modes (stationary, transient, part load, high load, DPF regeneration). To do this, a systematic study and analysis of variable valve train for passenger car Diesel engines has been considered to reduce the in-cylinder polluting emissions, improve the regeneration behavior, and optimize transient performance with regards to emission and torque within engine cycle operation (NEDC, WLTC).
Period 03/2014 - 06/2016

 
 

 
 

LPG system comparison I&II

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Title

Investigation of the Effect of Supercritical LPG on Combustion Phenomena and Hot Fuel Handling Issues in LPG DI Systems

Funding

Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)

Projectnumber

FVV 1069/1151

Description

During the predecessor FVV project 1069 “LPG System Comparison“, it was shown that direct injection of LPG (Liquefied Petroleum Gas) in modern spark ignition engines exhibits outstanding combustion behavior and avoids the significant low end torque drop, which goes along with external LPG mixture formation systems. However, the high vapor pressure of C3 hydrocarbons can induce fuel evaporation in the high or low pressure side of the high pressure pump (HPP), which results in rapid density reduction and thus engine stall. Another severe drop in density occurs close to the critical point of the fuel. This is particularly critical under hot soak conditions. In order to assist the process of the European fuel standardization (EN 589), the results of this project indicate a maximum content of 70 % (m/m) C3 fuel components as upper limit for an LPG direct injection concept using a state of the art gasoline HPP technology. For a maximum propane content of 70 % (m/m), pump functionality can be maintained with a fuel pressure of approximately 45 bar upstream the HPP at hot soak fuel temperatures of about 110 °C.

For fuel pressures below the critical point, vehicle tests showed that only sufficient cooling measures can prevent fuel boiling for LPG with high propane content. The severe density gradients also lead to a significant increase in injection duration during stationary idle operation compared to gasoline. Furthermore, resistance against gas phase pre-ignition and glow ignition is significantly increased for LPG fuels with high propane contents. However, the high resistance towards combustion anomalies is diminished with increasing fuel temperatures. Overall, the best correlation, in order to describe pre‑ and glow ignition behavior, was found for the methane number and the propane content.

The experimental investigations of wear indicate no noticeable injector wear for liquid operation. However, injectors tested with supercritical LPG show increased wear at the valve seat compared to gasoline operation, which can be explained by the decreased viscosity, surface tension and therefore reduced lubricity of LPG in supercritical state. For both physical states of the fuel, liquid, and supercritical, considerably increased wear was noticed at the piston of the gasoline HPP.

Period 08/2013 - 01/2016