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Henaux, Daniel
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Coupled Dynamic Simulation of Two Stage Variable Compression Ratio (VCR) Connecting Rod Using Virtual Dynamics

SAE International Journal of Advances and Current Practices in Mobility

FEV Europe GmbH-Sebastian Sonnen, Alexander Uhlmann, Daniel Henaux
FEV India Pvt Ltd-Prashant Mane, Ralf Blum, Vijay Sharma
  • Journal Article
  • 2019-26-0031
Published 2019-01-09 by SAE International in United States
The fuel consumption of combustion engines requires continuous reduction to meet future CO2 fleet targets. The progression of emission legislations shifted the focus on PN and NOX emissions in real world driving scenarios (RDE). Recently, the monitoring of CO emissions puts high load fuel enrichment for component protection into focus and a ban on enrichment is widely expected. Hence, gasoline engine technologies, which enable Lambda 1 operation in the entire engine map are specifically promoted. Variable Compression Ratio (VCR) attacks all these topics already at the combustion process. In addition to the well-known CO2 capability, VCR also enables enlargement of the lambda 1 operation in gasoline engines as well as reduced NOX emissions in diesel engines. The basic principle of developed VCR solution is to change the effective length of the connecting rod (and thereby the compression ratio) in two stages by several millimeters. Basically, the VCR connecting rod consists of a mechanical and hydraulic system which is fed with oil by the connecting rod bearing. All functional elements to realize the variability such as…
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Measurement Studies on the Tribological System Piston - Piston Ring - Cylinder

FEV GmbH, Aachen-Mirko Plettenberg
Institute for Combustion Engines, RWTH Aachen University-Daniel Henaux, Benedikt Hammermüller
Published 2015-09-01 by SAE International in United States
FEV GmbH has developed a special measurement technique, which allows the simultaneous detection of the axial and radial movement behavior of the piston rings and the dynamic pressure behavior in the entire piston ring pack [1.]. At the same time also the dynamic deformation behavior of the piston rings can be investigated. The measurement studies were carried out over the entire operating map of a V6 petrol engine and can be used for analysis and deeper understanding of the dynamic effects in the piston ring pack [2.]. A selection of recorded measurement data is presented in this paper.
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