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Dynamic oil pressure in connecting rod bearings and their influence on innovative cranktrain technologies Institute for Combustion Engines VKA, RWTH Aachen University
- Format:
- Book
- Conference/Event
- Author/Creator:
- Pendovski, Denis, author.
- Conference Name:
- 2019 JSAE/SAE Powertrains, Fuels and Lubricants (2019-08-26 : Kyoto, Japan)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2019
- Summary:
- In order to lower friction losses and hence ensure low fuel consumption of internal combustion engines, borderline design of hydrodynamic cranktrain bearings is often unavoidable. To realize this without the risk of failures, detailed modelling of hydrodynamic effects is gaining more and more relevance. In this publication, an approach using flow simulation to couple hydrodynamic bearings with each other, will be introduced. This allows the state variables of the fluid in the supply bore of the crankshaft to be calculated transiently. One important aspect of this concerns the solubility of gas in oil. This paper demonstrates that the gas fractions in the supply bore of the crankshaft influence the pressures at the hydrodynamic bearings. Additionally, simulation results will be shown and also validated with measurement data. Beside the application for conventional cranktrains, the developed methodology can also be applied to investigate lubrication systems, which include innovative technologies such as hydraulic, length adjustable connecting rods employed for variable compression ratio (VCR connecting rod)
- Notes:
- Vendor supplied data
- Publisher Number:
- 2019-01-2333
- Access Restriction:
- Restricted for use by site license
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