Internal combustion engines

Internal combustion engines currently are an elementary part of the individual mobility.
In the future, this drive concept will remain a sustainer of vehicle movement.

Ingenieurbüro TWB has a longtime experience
in the field of thermodynamic and flow simulations of internal combustion engines.

Our modular development process enables fundamental insight to incylinder processes.
The individual parts can be utilised independently.
Flow simulation (CFD - Computatinal Fluid Dynamics) within the process are based on OpenFOAM®

Mesh motion is done with an adaptive parallel algorithm.
A time consuming meshing process can be avoided.
Espacially the simulation of parameter and geometry variations can be realised advantageous.

Precise flow analysis enables to predict burn characteristics
even before a combustion simulation itself.

The adaption of direct injection for the combustion system includes numerous parameters.
CFD simulations are conducted to analyse injector position, injection timing
and strategy for the split of the fuel mass into several injections.

The simulation of the combustion delivers deep insights into the interaction of charge motion,
mixture formation and ignition. An optimal combination of these parameters enables for the development of efficient engines.

Cyclic combustion anomalis like engine knock for example
restrict the theoretically possible efficiency of modern engines.
TWB simulates these limits of combustion systems by means of reaction kinetics.

The phenomenon known as mega-knock, super-knock or LSPI (Low Speed Pre-Ignition),
can lead to immediate mechanical damage of engine components.
TWB here combines experience of CFD and reaction kinetics simulations
with a stochastic approach for spatial forecasting the probability of mega-knock.

The combined use of flow simulation and reaction kinetics
enables also for the prediction of emissions.