What is the Crank Connecting Rod Mechanism of an Engine?

1 Answers
RobertLee
07/30/25 7:51am
The function of the crank connecting rod mechanism is to convert the reciprocating motion of the piston into the rotational motion of the crankshaft, thereby driving the rotation of the car's wheels. Composition of the Crank Connecting Rod Mechanism: The crank connecting rod mechanism consists of three main parts: the engine block group, the piston connecting rod group, and the crankshaft flywheel group. The engine block group includes the cylinder block, cylinder gasket, cylinder head, crankcase, cylinder liner, and oil pan. The piston connecting rod group comprises the piston, piston rings, piston pin, and connecting rod. The crankshaft flywheel group consists of the crankshaft, flywheel, torsional vibration damper, and balance shaft. Working Principle of the Crankshaft: The crank connecting rod mechanism is the transmission mechanism in an internal combustion engine that realizes the working cycle and completes energy conversion. It is used to transmit force and change the mode of motion. During operation, in the power stroke, the crank connecting rod mechanism converts the reciprocating motion of the piston into the rotational motion of the crankshaft, thereby outputting power externally. In the other three strokes—intake, compression, and exhaust—the rotational motion of the crankshaft is converted back into the reciprocating linear motion of the piston.
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