What is connecting rod: Definition and 15 Discussions

A connecting rod, also called a 'con rod', is the part of a piston engine which connects the piston to the crankshaft. Together with the crank, the connecting rod converts the reciprocating motion of the piston into the rotation of the crankshaft. The connecting rod is required to transmit the compressive and tensile forces from the piston. In its most common form, in an internal combustion engine, it allows pivoting on the piston end and rotation on the shaft end.
The predecessor to the connecting rod is a mechanic linkage used by water mills to convert rotating motion of the water wheel into reciprocating motion.The most common usage of connecting rods is in internal combustion engines or on steam engines.

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  1. GYan

    Static B.C & first moment of area of connecting rod

    Hello everyone, I am doing a project in FEM, and we first have to assess the mechanical behavior of a connecting rode in which there is a hole in the center part of height b. The connecting rode has a trapezoidal shape (when seem from the top view), so the cross section is gradually decreasing...
  2. S

    Engineering FEA question (stuck): Stress analysis on this Connecting Rod

    Hey Im doing FEA and got stuck on question. The diagram go me stuck, because looking through the workbook it says high stresses are in red and low in blue, whereas they included both different kind of stresses on the same diagram and no data. Note: High Compressive strains are noted by blue...
  3. H

    What makes a connecting rod turn a crank one way?

    This may be the most awkward unexpected question ever concerning the reasoning for which I ask it. I begin with explaining the reason because I think you should know why I ask this question to begin with so you can understand what underlying basic principle of this mechanic I want to...
  4. M

    Connecting rod failure Hyundai Veloster 1.6

    I purchased this car new 2013, 29,999 miles and the dealer has been the only one who worked on it. We use synthic oil. After driving the last 100 mile at 60 mph the engine stopped. I had it towed to the dealership. The lower end of #4 con rod was sticking out of the Aluminum block. The...
  5. S

    Offset crank slider mechanism connecting rod analysis

    Homework Statement A) Determine the value of the angle θ (measured from vertical) when the angular velocity of link AB a maximum. B) What is the maximum angular velocity of link AB. Homework EquationsThe Attempt at a Solution This is a part of a bigger question. I've managed to answer all...
  6. A

    How to disconnect connecting rod and crank

    I have a mechanism wish to disconnect connecting rod and crank when i cycling so that i do nt need to use additional force to turn connecting rod also but connect them once my driving system is set up and piston that connected to rod can rotate my crank how can i set up this mechanism?
  7. S

    Un equal weight connecting rod will creat problem?

    Hi..all. I have replaced a connecting rod against a failed one (in a 10 piston Benz engine) which is 100 GM lesser than original one since the supplier has modified to Euro norms and old rod no more availble. Now after woking 100 odd hours, the engine failed. After dismantling the engine it was...
  8. P

    Maximum pressure exerted on the connecting rod by the brake pads: 12.4 KN

    Homework Statement what is the down force on the connecting rod? i tinnk I've work most of it but I'm a bit unsure of what to do next? A train of mass 138800kg have 24 wheels (12 axles) V = 37.1 m/s U =0 s= 694 m F= 12.1KN R = 0.4 m r = 0.21 m Homework Equations V2 =...
  9. M

    Connecting Rod Failure in 4 Stroke Petrol Engines

    hi.. I am new to this site. I want to know about reasons of failure of connecting rod of 4 stroke petrol engine. In this case the rod has broken into two parts from the small end of the rod. The manufacturing root of the component is hot forging - hardening - induction softening of the small...
  10. C

    Looking for opinions on connecting rod failure

    Unfortunately the piston has disintegrated so we are unable to use that to form an opinion on this failure. Please let me know your thoughts, thank you! http://www.maperformance.com/gallery/pictures/rodfailure1.jpg [PLAIN]http://www.maperformance.com/gallery/pictures/rodfailure2.jpg...
  11. P

    Combustion connecting rod failure (in cars)

    Hi all, I have this question from my friends and hope get the answer. Using your car with the oil is not sufficient, the connecting rod is the first to fail. Normally it burns both bearings or the smaller one (connecting to piston) burns first? I think there's a dilemma here: the bigger one...
  12. S

    Angular velocity of a connecting rod on a rotating wheel.

    Homework Statement A rotating wheel with radius 40 cm and a connecting rod PQ with length 1.2m. The pin P slides back and fourth along the x-axis as the wheel rotates counterclockwise at a rate of 360 revolutions per minute. Find the angular velocity of the connecting rod, da/dt, in radians per...
  13. M

    Failure of a connecting rod

    Hey Guys, Please help me out. Q. The connecting rod of a newly developed internal combustion engine for ultra-light vechicle failed catastrophically during testing, damaging the crankshaft and smashing the engine block into two. An emamination of the fracture surfaces revealed that the cause...
  14. M

    Failure of a connecting rod

    Hey Guys, Please help me out. Q. The connecting rod of a newly developed internal combustion engine for ultra-light vechicle failed catastrophically during testing, damaging the crankshaft and smashing the engine block into two. An emamination of the fracture surfaces revealed that the cause...
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