Diesel Engine 4HG1 4HL1 Connecting Rod 8971350320 8944734436 Bearing Two Notch Stagger Piston Pin Hole 36mm

Connecting Rod 4HF1 4HG1 4HL1 isuzu engine parts

The connecting rod body is composed of three parts, and the part connected with the piston pin is called the connecting rod small end; The part connected with the crankshaft is called the big end of the connecting rod, and the rod connecting the small end and the big end is called the connecting rod body.

The small end of the connecting rod is mostly a thin-walled ring structure. In order to reduce the wear between the connecting rod and the piston pin, a thin-walled bronze bushing is pressed into the small end hole. Drill holes or mill grooves on the small head and bushing to make the splashed oil foam enter the mating surface of lubricating bushing and piston pin.

The rod body of the connecting rod is a long rod, which is also subjected to large force in work. In order to prevent its bending deformation, the rod body must have sufficient stiffness. Therefore, the connecting rod body of vehicle engine mostly adopts I-shaped section, which can minimize the mass under the condition of sufficient stiffness and strength. H-shaped section is used for high strengthening engine. Some engines use the small end of the connecting rod to spray oil to cool the piston, and a through hole must be drilled longitudinally in the rod body. In order to avoid stress concentration, large circular arc smooth transition is adopted at the connection between connecting rod body and small end and large end.
In order to reduce the vibration of the engine, the mass difference of the connecting rod of each cylinder must be limited to the minimum range. When the engine is assembled in the factory, it is generally grouped according to the mass of the large and small ends of the connecting rod, and the same group of connecting rods is selected for the same engine.

On the V-type engine, the corresponding cylinders in the left and right rows share a crank pin, and the connecting rod has three types: parallel connecting rod, fork connecting rod and main and auxiliary connecting rod.



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