This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of Fracture Split Steel Connecting Rods
Technical Paper
2003-01-1309
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Fracture split steel connecting rod has been developed for new passenger diesel engines for its advantages in cost saving and better performance. The splitting type of steel con rod is made of high carbon micro-alloyed steel with no additional heat treatment after hot forging. This con rod blank is forged in one-die mold and later fracture splitted. Unlike the conventional types where the rods and caps are separately forged and machined, this steel split con rod needs no additional rod/cap contact face milling which means a substantial savings in machining cost. Besides, a firm contact between rod and cap improves stiffness and compatibility with other crank-train moving parts - a definite merit in engine performance.
Our research work focuses on optimizing the two major technologies in this subject - microstructural analysis of controlled cooling (high carbon micro-alloyed steels) and detailed fracture splitting parameters and test results. We are now expecting up to a 25% reduction in cost as well as a significant improvement in engine performance (stiffness increase of at least 10%, weight tolerance of forge blank less than ±1%).
Recommended Content
Authors
- Hyounsoo Park - Hyundai Motor Company, R&D Center
- Young Sang Ko - Hyundai Motor Company, R&D Center
- Seung Cheal Jung - Hyundai Motor Company, R&D Center
- Byung Tag Song - Hyundai Motor Company, R&D Center
- Yong Ha Jun - Hyundai Motor Company, R&D Center
- Byung Cheol Lee - Hyundai Motor Company, R&D Center
- Jong Dae Lim - Hyundai Motor Company, R&D Center
Citation
Park, H., Ko, Y., Jung, S., Song, B. et al., "Development of Fracture Split Steel Connecting Rods," SAE Technical Paper 2003-01-1309, 2003, https://doi.org/10.4271/2003-01-1309.Also In
References
- Repgen. B. “Optimzed con rods to enable higher engine performance and cost reduction” SAE 980882
- Baek S.Y. et al. “Application of high performance powder metal connecting rod in the V6 engine” SAE 970427
- Olaniran M. Stickels C. “Separation of forged steel con rods and caps by fracture splitting” SAE 930033
- Motohide M. et al. “Development of high strength microalloyed steel for con rod”
- Gupta R. “Recent developments in materials and process for automotive con rods” SAE 930491