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Performance Improvements for Connecting Rod Bearings with “End-Relief”
Technical Paper
2002-01-1729
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The constant engine development requirements of increased durability with lower cost, size and power loss need innovations in technology from designers and manufacturers of critical components such an engine bearings. A detailed experimental program has shown that a connecting rod bearing with “end-relief” grooves can give surprising and unexpected benefits in reducing bearing temperature. Bearing shells with “end-relief” resulted in an effective bearing width reduced by 6mm or 30%, yet still gave benefits in temperature reduction. The depth of the “end-relief” was too large for any hydrodynamic oil film to generate pressure to support the applied load.
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Citation
Mian, A., Parker, D., and Williams, B., "Performance Improvements for Connecting Rod Bearings with “End-Relief”," SAE Technical Paper 2002-01-1729, 2002, https://doi.org/10.4271/2002-01-1729.Also In
Lubricant Systems, Passenger Car, and Heavy Duty Engine Lubricants
Number: SP-1710; Published: 2002-05-01
Number: SP-1710; Published: 2002-05-01
References
- “Measured Crankshaft Bearing Oil Flow and Temperatures with a Full and Partial Groove Main Bearing” Mian A. Omar Parker Derrick D. Williams Bob SAE world Congress Detroit, Michigan March 6-9 2000
- “Dana Corporation - Bearing with end relief”
- “The Influence of Geometry and Grooving on the Measured Temperatures of Crankshaft Bearings” Jones G J SAE International Congress & Exposition Detroit, USA February 26-29 1996