What are the parts of connecting rod?

Following are the parts of connecting rod:

• Small End.
• Big End.
• Bushing.
• Bearing inserts.
• Bolt and Nut.
• Shank.
• Wrist pin.
• Piston.

What are the two main parts of a connecting rod?

Following are the parts of connecting rod:

• Small End: The end at which the connecting rod is attached to the face of the piston pin is known as the small end of the connecting rod.
• Big End: The end at which the connecting rod is attached to the side of the crank pin is known as big end of the connecting rod.

What are the functions of connecting rod?

A connecting rod or conrod converts the linear up and down movement or reciprocating motion of the piston into circular motion of the crankshaft. It experiences tension, compression bending and buckling during the process.

What are connecting rods in an engine?

A connecting rod is an engine component that transfers motion from the piston to the crankshaft and functions as a lever arm. Connecting rods are commonly made from cast aluminum alloy and are designed to withstand dynamic stresses from combustion and piston movement.

What are the three principal types of connecting rod assemblies?

There are three principal types of connecting-rod assemblies: (1) the plain type, shown in Fig. 2-18, (2) the fork-and-blade type, shown in Fig. 2-19, and (3) the master and articulated type, shown in Fig. 2-20.

What are the parts of a crankshaft?

A crankshaft consists of crankpins, crank webs (crank arms or cheeks), balancing weights, and main journals. The large end of the connecting rod is attached to the crankpin of the crankshaft. During one stroke, the center-to-center distance between the crankpin and the crankshaft is half of the piston displacement.

Why are connecting rods made of I section?

The I-section of the connecting rod is used due to its lightness and to keep the inertia forces as low as possible. It can also withstand high gas pressure. 2. Sometimes a connecting rod may have rectangular section.

How do you test a connecting rod?

Always inspect any connecting rod for bend and twist. A bend in the rod beam results in the centerline of the big-end bore being out of alignment with the center of the wrist pin bore. A twist in the beam throws the big-end bore out-of-plane with the small end.

What are connecting rod bearings made of?

Both rod and main bearings are usually made from nonferrous metals (a metal that doesn't contain iron). Examples of bearing materials include aluminum and bronze.

What are the parts of the four stroke cycle?

What Are the Strokes of a 4-Cycle Engine?

• Intake Stroke. Small engines get fuel and air through the carburetor. ...
• Compression Stroke. Both the intake and exhaust valves are closed in the compression stroke. ...
• Power Stroke. Once the piston gets to the top, it is at the optimum point to ignite the fuel. ...
• Exhaust Stroke.

What are the forces acting on connecting rod?

Following are the forces acting on connecting rod (i) Force on the piston due to gas pressure. (ii) Force due to inertia of the connecting rod and reciprocating mass. (iii) Force due to friction of the piston rings and of the piston.

What is connected to the crankshaft?

The crankshaft is connected to the fly-wheel (used to smooth out shock and convert energy to torque), the engine block, using bearings on the main journals, and to the pistons via their respective con-rods.

What causes rod bearing damage?

DAMAGING ACTION

A bent or twisted connecting rod results in misalignment of the bore, causing the bearing to be cocked so the bearing edge makes metal-to-metal contact with the journal. These metal-to-metal contact areas cause exces sive wear on the bearing surface.

What metal are rod bearings made of?

A friction rod's bearings are usually made from non-ferrous metals, such as bronze, aluminum, and babbitt material. Steel that does not contain iron is considered a nonferrous metal. Silver and copper are commonly alloys of nonferrous metals. Zinc and copper are metals that can be composed of brass and aluminum.

What are main bearings made from?

All bearing inserts start with a steel alloy shell over which the softer bearing material is bonded. We can now categorize bearings into two major groups – aluminum alloy or copper/lead alloy bearings. The aluminum alloy bearings are what the OE's use for a typical production engine.

How do you know if your connect rod is bent?

The most common symptom of a bent connecting rod is low engine compression, leading to misfires showing with a check engine light on your dashboard. It can also cause loud noises from your engine or a seized engine.

How do you check a connecting rod bend?

One can check bend by using two pins and v block. In this method, two pins with exactly same diameter of pin bore and crank bore are used. Length of pins should be longer than the width of connecting rod and both the pins should be of same length. Connecting rod is rested on v block.

Why is the connecting rod shank portion made of I section?

The I – section has greater strength than the round section without compensating it's strength. HENCE TO REDUCE THE INERTIA WE TO REDUCE THE WEIGHT OF THE CON-ROD WITHOUT COMPENSATING THE STRENGTH OF THE CON-ROD. THE I-SECTION HAS GREATER STRENGTH THAN THE ROUND SECTION WITHOUT COMPENSATING STRENGTH.

What is whip loading?

THE CON-ROD OF 4-STROKE ENGINE IS SUBJECTED TO AN INERTIA WHIP LOADING DUE TO MASS OF THE PISTON SWINGING ABOUT THE PISTON AND HIGH SPEED OF ROTATION. IN 2 STOKE ENGINE THIS WHIP LOADING IS LESS DUE TO LOW SPEED OF ROTATION. MOREOVER, THERE IS A REVERSAL OF STRESS DUE TO INERTIA LOAD BETWEEN EXHAUST AND INLET STROKE.

What is whipping stress in connecting rod?

The perpendicular (or transverse) components produces bending action (also called whipping action) and the stress induced in the connecting rod is called whipping stress.

What is a connecting rod journal?

The connecting rod journals are offset from the axis of rotation, and are attached to the big ends of the pistons' connecting rods. Confusingly, they are commonly also called crank pins or rod bearing journals . A feed of pressurised oil comes through an angled oil passage drilled from the main journal.

What is crankshaft assembly?

A crankshaft assembly for an internal combustion engine having a one-piece elongated shaft adapted to rotate about a longitudinal axis. The shaft includes a radially offset portion between the ends of the shaft, and this radially offset portion is spaced axially inwardly from each end of the shaft.

What is connecting rod bearing?

Connecting rod bearings provide rotating motion of the crank pin within the. connecting rod, which transmits cycling loads applied to the piston. Connecting rod bearings are mounted in the Big end of the connecting rod. A bearing consists of two parts (commonly interchangeable). •