Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank. The connecting rod connects the piston to the crankshaft and they. Slider crank mechanism for demonstration and experimentation. It transmits forces between the piston and connecting rod while allowing the piston and connecting rod to rotate relatively independent of each other. It has a hole at the upper end small end and is connected to the piston by the wrist pin. Together with the crank, they form a simple mechanism that. Catia v5 practice design master connecting rod for beginners catia part modeling part design duration. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and connecting rod. Introduction the intermediate component between crank and piston is known as connecting rod. And is responsible to transmit the push and pull from the piston pin to crank pin, thus.
Pdf design and analysis of 150cc ic engine connecting. The analysis of the scania line together with a benchmark among different leading companies on the connecting rod manufacturing has been undertaken. Pdf piston is the part of engine which converts heat and pressure energy liberated by fuel combustion into mechanical works. Design and analysis of connecting rod using forged steel ijser. The lower end, also called as big end, is attached to the crankshaft.
Pdf design of connecting rod of internal combustion. The connecting rod is modeled as plane stress problem using 25 quadrilateral pelements. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Design of crank shaft, connecting rod and valve gear. The design was modified slightly from the existing forging designs due to different requirements of the cross. Its primary function is to transmit the push and pull from the. The shape of the connecting rod is to be determined to minimize its weight subject to a set of stress constraints. Nomenclature a cross sectional area of the connecting rod.
It details the design requirements for pistons and rings, typical arrangements depending on the type of engine and the detailed design formulae required for an initial piston and ring design. Dynamic load analysis and optimization of a fracturesplit. After analysis a comparison is made between existing steel connecting rod viz. In this video, we will sketch a connecting rod using the solidworks. Pdf design and analysis of a connecting rod for the 117kw six. Objectives and outline link between piston and crankshaft to convert the. If the connecting rod fails because it bends this is usually due to engine knock from a bad tune, not a bad set of rods. The connecting rod is required to transmit the compressive and tensile forces from the piston, and rotate at both ends. Design and analysis of assembly of piston, connecting rod and. The main function of connecting rod is to transmit the translational motion of piston to rotational motion of crank shaft. Design a fourcylinder internal combustion engine project. Together with the crank, they form a simple mechanism that converts reciprocating motion into rotating motion. The connecting rod provides the mechanical linkage between piston and crankshaft and must exhibit properties of high strength, low inertial mass, and uniformity of mass with the other connecting rods attached to the crankshaft. A comparison of manufacturing technologies in the connecting.
Slider crank mechanism for demonstration and experimentation page 6 background the assembly of a piston, cylinder, connectingrod and crankshaft is the classic form of the. Introduction the connecting rod is one of the most important parts in engine that connects the piston to the. Jawaharlal nehru technological university, kakinada, ap, india. It has had a significant impact on society, and is considered one of the most significant. The objectives of this paper are to develop structural modeling, finite element analyze and the optimization of the connecting rod for robust design. Based on the fea results the design of the connecting rod is. Analysis and optimization of connecting rod used in heavy commercial vehicles biradar akshaydatta vinayakrao1, prof. The piston slides over the cylinder and it travels from the one end to the other end of the cylinder. Pdf connecting rod is one of the engines key components which connect the piston to the crankshaft and converts the pistons reciprocating. The connecting rod connects piston and the crankshaft, and it is responsible to transmit the power from the piston to crankshaft thus, converting the.
Currently existing connecting rod is manufactured by using forged steel. Pdf a connecting rod basically connects the piston to the crankshaft whilst transmitting power of the combustion from the combustion. Introduction a connecting rod is the link between the reciprocating piston and rotating crank shaft. In the floating pin design, the piston pin is clearancefit into both the piston and connecting rod. Piston pin is a link which connects the piston with the connecting rod. Design and analysis of connecting rod for high speed.
This paper presents the design connecting rod of internal combustion engine using the topology optimization. Force due to friction of the piston pin and crank pin bearings. Its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a connecting rod. Jul 02, 2017 hello,welcome to the solidworks tutorials. These ideas have been mainly related to machining sequence, machine tool and new technologies for machining. Connecting rod is also known as conrod and is used to connect the piston to crankshaft.
The connecting rod is made by drop forging process. Connecting rod crankpin bore temps are similar, but piston pin end temperatures are higher as they are exposed to the bottom side of the piston. This thesis has been focused on the study of the connecting rod manufacturing process. Aug 14, 2015 aug 14, 2015 16 biella pistone connecting rod piston. The objective of the present work is to design and analyses of connecting rod made of forged steel. Design and analysis of connecting rod using forged steel. Design evaluation and optimization of connecting rod parameters. They are not rigidly fixed at either end, so that the angle between the connecting rod and the piston can change as the rod moves up and down and rotates around the crankshaft.
Connecting rod is the intermediate link between the piston and the crank. The function of the connecting rod also involves transmitting the thrust of the. Connecting rod design a6200 reengineering the model. Piston and types of piston, definition, function, pdf. This project aims at designing a connecting rod with standard dimensions of a stock one in creo 3. To design for fatigue, modified goodman equation with alternating octahedral. The performances of automobiles rely on the engine in high extent, plus connecting rods are the main part of the engine, whose work environment is poorer and pressure is complex. Connecting rod is an integral component of an engine and it is classified under functional component based on its application.
M sayeed ahmed 2014, in a reciprocating piston engine, the connecting rod connects the piston to the crank or crankshaft. Main problem expected to be found in the design of the large piston is the. Its primary function is to transmit the push and pull from the piston pin to the crank pin and thus convert the reciprocating motion of the piston into rotary motion. This imbalance generally manifests itself as a vibration, which causes. Design considerations for connecting rod international journal of. Together with the crank, it forms a simple mechanism that converts reciprocating motion into rotating motion it is the main function of a conne. As the only piston manufacturer with inhouse forging capabilities, you know youre getting an optimized. Abstract the connecting rod is the intermediate member between the piston and the crankshaft. Connecting rod, finite element analysis, modeling, static i. A connecting rod is a shaft which connects a piston to a crank or crankshaft in a reciprocating engine. Rod clevis crsg corrosion and acidresistant design. In general a slider crank transmits motion generated by the linear displacement of the piston by a working fluid to rotational motion of a shaft. Introduction connecting rod is an integral component of internal combustion engine.
The cylinder is connected to to the connecting rod through welding. Two different options for piston pin joint design are presented in fig. Engine pistons are one of the most complex components among all automotive or other industry. Pdf design and analysis of connecting rod using forged steel. The big end of the connecting rod is connected to the crankshaft. This information should be referenced anytime the pistons and rods are being serviced during engine rebuild. Manganese steel for the connecting rod and high carbon steel for the crank shaft. Connecting rod, analysis of connecting rod, four stroke engine connecting rod, aluminium alloy connecting rod, design and analysis of connecting rod. The big end connects to the bearing journal on the crank throw, running on replaceable bearing shells accessible via the.
Since the piston is the main reciprocating part of an engine, its movement creates an imbalance. Design and analysis of piston using composite material. This thesis describes designing and analysis of connecting rod. Dfma analysis was performed and computes all the essential requirements and the most optimal design was chosen. Together with the crank, the connecting rod converts the reciprocating motion of the piston into the rotation of the crankshaft. Theoretical analysis of stress and design of piston head. Pdf design and analysis of 150cc ic engine connecting rod. It acts as a linking member between piston and crank shaft. Design and analysis of assembly of piston, connecting rod. Fatigue strength is the most important driving factor for the design of connecting rod and it is found that the fatigue results are in good. Analysis of pistonpin lubrication considering the effects.
Pdf design of connecting rod of internal combustion engine. It is concluded that the weight of the connecting rod is also reduced by 0. Engine connecting rod an overview sciencedirect topics. In europe, the invention of the crankconnecting rod system was unknown before the early fifteenth century. The structure of connecting rod was modeled utilized solidworks software. In this study, firstly, thermal analyses are investigated on a piston, made of cast aluminium alloy and titanium alloy. Materialized optimization of connecting rod for four stroke. Finite element analysis of ic engine connecting rod by ansys r a savanoor1, abhishek patil2, rakesh patil3 and amit rodagi2 corresponding author. Dynamic load analysis and optimization of a fracturesplit connecting rod. The geometric model, finite element mesh, physical dimensions, and design variables are shown in figure 3. Piston design the piston is designed according to the procedure and specification which are given in machine design and data hand books. As a main part in an engine, piston endures the cyclic gas pressure and the inertial forces at work, and this real working condition may cause the fatigue damage of piston, such as piston skirt wear, piston head or crown cracks and so on. Reducing friction between the connecting rod and piston pin. The internal combustion engine was conceived and developed in the late 1800s.
As a main part in an engine, piston endures the cyclic gas pressure and the inertial forces at work. In a reciprocating piston engine, the connecting rod or connecting rod connects the piston to the crank or crankshaft. A comparison of manufacturing technologies in the connecting rod industry. And find the optimal solution after the theoretical calculation. A connecting rod, also called a con rod, is the part of a piston engine which connects the piston to the crankshaft. The function of the connecting rod also involves transmitting the thrust of the piston 1. Steel materials are used to design the connecting rod. In the engine of the automobile, connecting rod is a high volume production and critical component. When building a high performance engine, great attention is paid to the connecting rods, eliminating stress risers by such techniques as grinding the edges of the rod to a smooth radius, shot peening to induce compressive surface stresses to prevent crack initiation, balancing all connecting rod piston assemblies to the same weight and. The cranktrain is the heart of the reciprocating piston engine, and the purpose is. In the project we design a piston by using solid works 2016 design software and we. Small end of the connecting rod is connected to the piston by means of gudgeon pin. Main problem expected to be found in the design of the large piston is the deformation, due to pressure and temperature.
Engine and its intermediate link between the piston and crank. Now, force on connecting rod maximum gas pressure on piston. Design of connecting rod for high speed application in ic engine using two different materials likes aluminum and aluminum alloy alfasic and also mentions the its mechanical properties which are required for design of connecting rod. Verify repairs made to the piston and connecting rod assembly. The small end is press fit and can swivel in the piston. In a piston, its motivation is to exchange force from growing gas in the barrel to the crankshaft through a piston bar and additionally associating pole connecting rod. It has one big end connected to the crank and one small end which is connected to the piston. Connecting rods 101 design,material,modifications,and.
Oct 19, 2016 introduction connecting rod is an integral component of internal combustion engine. Design and analysis of piston by using finite element analysis. Pdf design considerations for connecting rod researchgate. The functions of connecting rod includes, providing a connecting iii. Analysis and optimization of connecting rod used in heavy. The pressure developed in the chamber first affects the piston top and then form there pass to the connecting rod through the gadget pin to the small end of the rod and then through the steam to the big end of the rod and then to the crank shaft which rotates and converts the reciprocating motion into rotary motion. Jun 20, 2015 introduction what is a connecting rod.
As a connecting rod is rigid, it may transmit either a push or a pull and so the rod may rotate the crank through both halves of a revolution, i. Connecting rod is an important link in ic engine which transmits force from piston to the crank. It acts as a linkage between piston and crank shaft. Design of connecting rod depends upon the speed of the engine. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.
Aljazaris fourth machine utilizing a connecting rod2. The assembly of a piston, cylinder, connectingrod and crankshaft is the classic form of the slidercrank mechanism. Piston designs in heavyduty diesels by steve scott such as in the case of an hourglass shape pro. Materialized optimization of connecting rod for four. The connecting rod is the intermediate member between the piston and the crankshaft. Each piston features a wider skirt for the major thrust side and a narrower skirt for the minor thrust side. As a connecting rod is rigid, it may transmit either a push or a pull and so the rod may rotate the crank through both halves of a. Abstact in a reciprocating piston engine, the connecting rod connects the piston to the crank or crankshaft.
Piston designs in heavyduty diesels engine professional. A connecting rod was modeled using the software solidworks and then it is imported to dfma. Connecting rod the connecting rod links the piston and the crankshaft. A connecting rod basically connects the piston to the crankshaft whilst transmitting power of the combustion from the combustion chamber to rotate the crank. The objectives of this paper are to develop structural modeling, finite element analyze and the optimization of the connecting rod for robust. The connecting rod is acted upon by different types of loads while undergoing its operation and are as follows, force on the piston due to gas pressure and inertia of the reciprocating parts force due to inertia of the connecting rod or inertia bending forces. To improve the efficiency of the engine there is a need to study about the piston. Design and analysis of connecting rod using forged steel leela krishna vegi1, venu gopal vegi2. The rod bolts will come apart as the piston travels up on the exhaust stroke, the force and inertia of the rotating assembly rips the rod cap off of the connecting rod.
The connecting rods are usually made of alloy steel, titanium and sometimes with aluminum. Download the pdf form and complete if you do not wish to complete the form below. If new parts such as pistons, rings, cylinder liners or bearings were installed, operate the engine on the runin schedule. A piston is a component of reciprocating engines, reciprocating pumps, gas compressors, and pneumatic cylinders among other similar mechanisms. With the help of piston pin, piston and connecting rod are associated and no relative motion between piston pin and piston. In order to decrease the inertial force and add the span life of the engine, the weight of connecting rods is as litter as possible. Optimal design of automobile connecting rod basic on. Methods of designing piston and ring assemblies neale. Sep 24, 2016 this article summarises the design methods for sizing of piston and piston ring assemblies. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reci procating motion of the piston into rotary motion of the crank. Fea and the load analysis results, recommend the best alternative design for the connecting rod. Introduction fatigue near a physical defect in the rod, lubrication in a reciprocating piston engine, the connecting rod failure in a bearing due to faulty. Pistons that are usually made up with alloy steels that show the grate resistant against thermal loads and structural loads. In this project the material carbon steel of connecting rod replaced with forged steel.
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