24. May 2017

“FEV Virtual Engine 25.1”: Dynamic simulation with extended functionality

FEV software allows high-precision two-sided elasto-hydrodynamics, wear prediction and extended timing drive chain friction analysis

FEV Virtual Engine 25.1 offers significant enhancements for elastohydrodynamic (EHD) journal bearing and piston-liner simulation as well as an advanced friction analysis for chain drives (Source: FEV Group GmbH)

Aachen-based engineering service provider FEV has launched a new release of its "FEV Virtual Engine” 3D powertrain dynamics simulation software. Version 25.1 offers significant enhancements for elastohydrodynamic (EHD) journal bearing and piston-liner simulation as well as an advanced friction analysis for chain drives.

“With the new release, we have added important functionality to FEV Virtual Engine that allows significant test cell development work to be replaced by simulation”, explained Professor Stefan Pischinger, president and CEO of the FEV Group. “Virtual Engine enables rapid and reliable predictions of drivetrain dynamics, resulting in dramatic reductions in the required development time.”

Since its introduction in 2008, the innovative, template-based FEV Virtual Engine software has combined the advantages of easy-to-use, special-purpose software with the performance of a universal, extensible dynamic simulation software tool.

"Virtual Engine’s extensive modeling options enable not only the analysis of every component in conventional powertrain drive systems, but it also includes simulation of new and innovative alternative designs such as start / stop systems, hybrid drives, transmissions and drivelines", said Mustafa Duyar, Product Business Manager for FEV Virtual Engine.

EHD analysis with even enhanced performance
Additionally to the proven one-sided elasto-hydrodynamic approach, the analysis now includes a two-sided elasto-hydrodynamics, so that the local deformations of both, the journal and bearing surfaces are calculated. This is particularly important for journal designs with lower stiffness such as hollow journals or piston pins.

The advanced two-sided EHD analysis is also applicable to piston and liner during the piston secondary dynamics simulation. With the advanced wear analysis, the wear of both, the bearing and journal surface can be evaluated. Additionally, the advanced wear analysis is capable to eliminate material from the bearing and journal surfaces during the dynamic analysis which allows to mimic the effect of real wear. The shape modification resulting from material removal can help to rate the durability of the journal bearing.

Extended Timing Drive Chain Friction Analysis
The friction model of chain drive elements has been extended with a viscous friction model. Chain Friction Analysis now covers the combination of internal and external chain friction results to assess the total timing chain drive friction. Total friction can be calculated over a user-defined simulation time interval.

Automatic Optimization of Valve Lift
Automatic optimization of the valve lift curve to maximize the gas exchange is now available for roller finger follower and rocker type valvetrains. Further optimization options will follow with the next release.

About FEV
FEV is a leading international, independent service provider for hardware and software in vehicle and powertrain development, as well as the energy industry. The range of competencies includes the development and testing of innovative solutions up to series production and all related consulting services. The range of services for vehicle development includes the design of body and chassis, including the fine tuning of overall vehicle attributes such as driving behavior and NVH. FEV also develops innovative lighting systems and solutions for autonomous driving and connectivity. The electrification activities of powertrains cover powerful battery systems, e-machines and inverters. Additionally, FEV develops highly efficient gasoline and diesel engines, transmissions, EDUs as well as fuel cell systems and facilitates their integration into vehicles suitable for homologation. Alternative fuels are a further area of development. The service portfolio also includes tailor-made test benches and measurement technology as well as software solutions that allow efficient transfer of the essential development steps of the above-mentioned developments, from the road to the test bench or simulation. For defossilization of the entire energy value chain, FEV offers energy management and infrastructure solutions from a single source, which intelligently link and holistically optimize power and heat generation, mobility, and industry. The FEV Group currently employs 6500 highly qualified specialists in customer-oriented development centers at more than 40 locations on five continents.