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:

Completed projects:

 
 

PEM-FC Cold Start Simulation

Logo FVV
Titel PEM-FC Cold Start Simulation
Funding Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV) - Eigenmittel
Projectnumber FVV1411
Description

The aim of this research project is to develop a modular, real-time capable simulation model of PEM fuel cell systems for cold start investigations. The model will be based on the existing model, which was developed in a previous FVV project and will now be extended for cold start investigations. Special attention will be paid to the spatially resolved model of the fuel cell stack, which will be improved to take into account the liquid water in the channel and web structure of the flow field. A solver algorithm based on artificial intelligence will be developed for this model to ensure real-time capability.

The simulation model of the fuel cell stack is supplemented by detailed multi-dimensional CFD simulations. The CFD model is indispensable for the investigation of water distribution within the cell layers, which is of particular interest for cold starts, and for phase change phenomena such as condensation and evaporation. The phenomena and distributions thus identified are used to verify the stack model. To validate the simulation results of both models, measurements on segmented test cells are performed in a cold start test rig.

The most critical component with regard to the cold start is the membrane humidifier. Therefore, the model of the membrane humidifier will be extended from the system model so that it can also be used for the simulation of cold temperatures. Due to the lack of available data for verification, simple CFD simulations of the membrane humidifier are performed and the results are used for validation. Thus, the project will develop a highly detailed fuel cell system model that is capable of simulating the transient behavior of fuel cell systems during cold starts.

Period

09/2020 – 08/2022

 

 
 

Fast Kocking Prediction

FVV Logo
Titel

Fast Knocking Prediction in gasoline engines

Funding FVV-EM - FVV-project with own resources promotion
Projectnumber M1018/1370 601370
Description

Method development for a predictive, fast and robust 0D simulation tool for the calculation of engine knocking and cyclical fluctuations considering the stochastic occurrence of these phenomena, fuel influences and their interactions.

The development efforts to increase the efficiency of gasoline engines aim at reducing the tendency to engine knocking and improving combustion stability, which are closely related to cyclic variations. The stochastic nature of these features makes a reliable, fast simulation a demanding task that has not yet been satisfactorily solved. Consequently, most simulation methods are almost exclusively based on extensive experimental data to simulate knocking.

The objective of the research project is to extend the conventional knock control of gasoline engines by a predictive part for the prediction of knock events, in order to be able to react to an imminent knock event.

Period 10/2019 - 09/2021

 
 

 

eMSI - Interference Noise in the Vehicle Compartment

Logo FVV
Title eMSI - Interference Noise in the Vehicle Compartment with Electrified Drives
Funding

Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)

Projectnumber

FVV1369

Description

The perceived quality impression is an important factor for the decision to buy. The perceived annoyance and euphony are decisive for the quality of the vehicle interior noise, regardless of the context. This aspect is gaining particular importance in the current market launch of electric and hybrid vehicles. In order to avoid customer acceptance problems, the customer's expectations for the quietest possible interior noise must already be fulfilled at this point in time. Both the progressive electrification and the increasingly widespread active design of vehicle interior noise pose new challenges for the project "Interference Noise in the vehicle Compartment with Electrified Drives" (eMSI). The elimination of the combustion engine as an acoustically masking component means that tyre/road, wind and auxiliary unit noises also come to the fore at low speeds. In order to support the active design of vehicle interior noise, the new requirement arises - in addition to the isolated consideration of noise components - to provide information for the targeted masking of component noise depending on the desired level of comfort.

The aim of the project is to break down the internal noise of electric and hybrid vehicles into individually perceptible noise components, which are then automatically assigned to the engine and drivetrain components responsible. In view of the current market introduction of vehicles with electrified drive systems, this project quantifies the comfort of the noise components of electrified drives based on customer expectations and using psychoacoustic parameters. In addition, depending on the level of comfort, concealing noise for component noises should be designed in such a way that the latter are perceived as being as pleasant as possible. The results are to be made usable for the application in a development tool.

Period

09/2019 – 08/2021

 
 

 

ICE2025+ Ultimate System Efficiency

Logo FVV
Title ICE2025+ Ultimate System Efficiency
Funding Forschungsvereinigung Verbrennungskraftmaschinen e.V. (FVV)
Projectnumber FVV1307
Description

CO2 targets in the range of 68 to 75g CO2/km are expected from 2025 onwards within the European Union. This ambitious goal will only be achieved with a great penetration depth of hybridized powertrains. From this derives the task for each manufacturer to develop a propulsion sytem with a favorable Cost-to-CO2-Benefit ratio. Integral part of such system will most likely be a spark ignited combustion engine. That engine has to deliver an overall efficiency close to the theoretical efficiency optimum in engine operating points relevant for hybrid operation strategies. Still an open point is the achievable maximum overall efficiency under real world conditions with an engine incorporating conventional, mature and therefore inexpensive technologies. Goal of the project is the optimization of the combustion engine aiming for an overall engine efficiency close to 45 % in engine operation points relevant for operation of HEVs or PHEVs. Outcome of the project is a rating which technologies are most effecitive with regard to overall engine effiency, bearing minimum risk and can preferably be used complementary to improve engine efficiency.

Period 03/2018 - 11/2020