Compact and Lightweight Design of A Connecting Rod Big-End

Use of lighter or compact reciprocating engine components has always been a desirable target for engine designers. Small savings in mass and dimensions here can result in significant benefits such as a reduction in total engine packaging dimensions and weight. A theoretical study of design parameters was carried out using the SABRE software programme developed by Glacier Vandervell Bearings. The results suggested that housing conformability can be favourable when applied to the cap for inertia loads but potentially detrimental when applied to the stem/big end blend. The results of a development and engine testing programme gave total rod weight savings of over 45% as compared to an existing best-in-class design.