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Composition and Function of the Crank Connecting Rod Mechanism

2 Answers

DanielaDella

07/24/25 9:33pm

The crank connecting rod mechanism consists of three parts: the engine block group, the piston connecting rod group, and the crankshaft flywheel group. The function of the crank connecting rod mechanism is to provide a combustion chamber, convert the expansion pressure of the gas acting on the top of the piston after fuel combustion into the rotational torque of the crankshaft, and continuously output power. The following is a related introduction: 1. Detailed introduction: Engine block group: cylinder block, cylinder gasket, cylinder head, crankcase, and oil pan. Piston connecting rod group: piston, piston ring, piston pin, and connecting rod. Crankshaft flywheel group: crankshaft flywheel. 2. Engine block group: The engine block is the skeleton of the engine and the installation base for various mechanisms and systems of the engine. It houses all the main components and accessories of the engine, both internally and externally, and bears various loads. Therefore, the engine block must have sufficient strength and stiffness.

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BennettLynn

08/10/25 2:41pm

When it comes to the crank-connecting rod mechanism, as someone who frequently disassembles engines, its composition is quite simple: the piston moves up and down in the cylinder, the connecting rod is attached to the piston at one end and connected to the crankshaft at the other, along with bearing sleeves. Its function is to convert the reciprocating linear motion of the piston into the rotational motion of the crankshaft, driving the flywheel to transmit power to the gearbox. Without it, the engine would be useless—the piston wouldn't move, and the car wouldn't go. Common issues during repairs include bent connecting rods or crankshaft wear, usually caused by improper lubrication or overheating. I use clearance measurement tools to check and ensure proper oil levels to prevent seizing. The overall design is ingenious, efficient, and fuel-saving. Regular maintenance, like oil changes, protects it. Never underestimate this component—poor maintenance can leave your car stranded.

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