ISSN: 2277-9655 [Patil Nilam* et al., 6(9): September, 2017] Impact Factor: 4.116 IC™ Value: 3.00 CODEN: IJESS7 http: // www.ijesrt.com© International Journal of Engineering Sciences & Research Technology [262] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY DESIGN ANALYSIS OF CONNECTING ROD FOR WEIGHT REDUCTION IN CASE OF A CI ENGINE – A REVIEW Nilam P. Patil *1 , Pundlik N. Patil 2 , Raghunath Y. Patil * M.E. Student, SGDCOE, Jalgaon(M.S.) Associate Professor, SGDCOE, Jalgaon(M.S.), India H.O.D., (MED) SGDCOE, Jalgaon(M.S.), India DOI: 10.5281/zenodo.891686 ABSTRACT Now a days internal combustion engines has a wide application in automobile and in different engineering field. Connecting rod is one of the important driving parts of the petrol and diesel engine. In this study we will discuss the detail review on the design analysis of the connecting rod for stresses produced under loading and suggest weight reduction opportunities. The function of the connecting rod is to transmit the piston thrust to the crankshaft. Therefore, connecting rod should capable to transmit different stresses caused by thrust and pull on the piston, it must be very strong, rigid and as light as possible. As per the literature survey it is observed that in many cases weight reduction of connecting rod was obtained by removing materials from certain regions. The widely used materials in connecting rod manufacturing are carbon steel, cast iron, wrought steel or powder metal etc. So there is a scope to try other materials like Titanium alloy, carbon fibre, aluminium alloy, glass fibre etc to produce light weight alternative. As these are light in weight, mass of the part will reduce. Therefore we can optimise the connecting rod for weight reduction with the use of such materials. KEYWORDS: Connecting Rod, stresss, FEA, weight ratio, ANSYS. I. INTRODUCTION Every vehicle which uses internal combustion engine requires at least one connecting rod. Combustion in I.C.Engine produces very high load which transmits to crankshaft via connecting rod. So connecting rod is subjected to many stresses like shear stress, compressive stress, tensile stress, etc In the case of four stroke engines, the connecting rod is subjected to a complex state of loading. It undergoes high cyclic loads of the order of 10 8 to 10 9 cycles. During compression and power strokes the connecting rod is subjected to compressive loads and during the last part of the exhaust and the beginning of the suction strokes, to tensile loads therefore durability of this component has critical importance. Due to these reasons connecting rod has been the topic of research. A connecting rod consists of a pin-end, a shank section, and a crank-end as shown in Figure. Pin-end and crank- end pinholes at the upper and lower ends are machined to permit accurate fitting of bearings. These holes must be parallel. The upper end of the connecting rod is connected to the piston by the piston pin. If the piston pin is locked in the piston pin bosses or if it floats in the piston and the connecting rod, the upper hole of the connecting rod will have a solid bearing (bushing) of bronze or a similar material. As the lower end of the connecting rod revolves with the crankshaft, the upper end is forced to turn back and forth on the piston pin. Although this movement is slight, the bushing is necessary because of the high pressure and temperatures. The lower hole in the connecting rod is split because it is to be clamped around the crankshaft. The bottom part, or cap, is made of the same material as the rod material and it is attached by two bolts. The surface that bears on the crankshaft is generally a bearing material in the form of a separate split shell. The two parts of the bearing are positioned in the rod and cap by dowel pins, projections, or short brass screws. Split bearings may be of the precision or semi precision type. The precision bearing is accurately finished to fit the crankpin and it does not require further fitting during installation. It is positioned by projections on the shell that match reliefs in the rod