This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Design and Validation of Innovative Bushingless Pin Joint System Technology for Mid-Range Connecting Rod
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 25, 2016 by SAE International in United States
Annotation ability available
Nowadays, due to high demand for more efficient engines, new technologies are coming in order to reduce engine size and pollutants emissions, but on the other hand pushing for additional performance by peak cylinder pressure (PCP) increasing. In this scenario, solutions as engine bearing downsizing, number of cylinder reduction and variable compression rate (VCR) has been provided. One of these new technologies is the bushingless connecting rod pin joint system in which the small end bushing is no longer used and the powercell system is composed by the piston pin assembled directly in the connecting rod small end. To enable this downsize with loads increasing, a technology with special micro-profile and coated for mid-range diesel vehicle application was developed, since there is a technical & cost restrictions of current bushings for upcoming PCP. Deep experimental validation, through engine tests, confirmed that this innovative design is robust allowing moving forward to serial production. So, not less important than the concept itself, it is its optimization through simulation based on experimental tests and related background. The optimization methodology was also developed and considers the running-in phenomenon, which is already known in engine components, and became a vital parameter to increase the robustness to different emission regulations. This optimized profile will guarantee that not only during the break-in condition the engine will have better performance, but also during all engine cycle under field operation presenting lower asperity pressure, optimum oil film thickness and related lower power loss.
CitationGalera, L., Salles, B., and de Souza Rodrigues, A., "Design and Validation of Innovative Bushingless Pin Joint System Technology for Mid-Range Connecting Rod," SAE Technical Paper 2016-36-0340, 2016, https://doi.org/10.4271/2016-36-0340.
- AVL Excite Power Unit Users Guide Manual version 2011.2 2012
- AVL Excite Power Unit Theory Manual version 2011.2 2012
- AVL Friction and Wear Analysis of Lubricated Contacts within IC-Engines
- AVL Hydrodynamic contact models - Surface roughness definitions
- FEV www.fev.com April 12 th
- Galera , L. and Rodrigues , A. S. Optimization of Lemon Shape Big End Profile Connecting Rod under Engine Operation in Elastohydrodynamic Regime SAE Technical Paper 2014-36-0309
- Galera , L. ; Rodrigues , A. S. ; Malburg , M. C. Importance of Connecting Rod and Crankshaft Roughness Accuracy on Sliding Bearing Performance SAE Technical Paper 2015-36-0311
- Greenwood , J. A. , Williamson , J. B. P Contact of nominally flat surfaces Proceedings of the Royal Society, A 295 1966 300 319
- Greenwood , J. A. , Tripp , J. H The contact of two nominally flat rough surfaces Proc. Inst. Mech. Engrs. 185 1970 625 633
- ICCT - The International Council on Clean Transportation www.theicct.org April 12 th
- Roland Berger Powertrain 2020 - The future drives electric 2009 Apr 2009
- http://ec.europa.eu/clima/policies/transport/vehicles/cars/index_en.htm April 13 th
- www.synlube.com April 3 rd