What are the components of the crank connecting rod mechanism?
2 Answers
The crank connecting rod mechanism consists of the engine block group, piston connecting rod group, and crankshaft flywheel group. The details are as follows: 1. The engine block group includes: cylinder block, cylinder head, cylinder gasket, cylinder cover, and oil pan. The engine block group serves as the support frame for the engine, providing the assembly body for the crank connecting rod mechanism, valve train, and other major components of the engine systems. It integrates various mechanisms and systems of the engine into a whole, maintaining necessary interrelationships among them. 2. The piston connecting rod group includes: piston, connecting rod, piston ring, piston pin, connecting rod bearing, connecting rod cap, and connecting rod bolts. This group converts the reciprocating motion of the piston into the rotational motion of the crankshaft, while transforming the force acting on the piston into the torque output by the crankshaft to drive the vehicle's wheels. It acts as the transmission component of the engine, transferring the pressure of combustion gases to the crankshaft, causing it to rotate and output power. 3. The crankshaft flywheel group includes: crankshaft, flywheel, torsional damper, crankshaft main bearing, crankshaft pulley, and timing gear. The crankshaft flywheel group converts the reciprocating motion of the piston into the rotational motion of the crankshaft, outputting torque for vehicle movement and other power-demanding mechanisms. Additionally, it stores energy to overcome resistance during non-power strokes, ensuring smooth engine operation.
Having worked in the garage for years repairing cars, I've seen countless crankshaft connecting rod mechanisms. It consists of core components like the crankshaft, connecting rod, piston, piston pin, and bearings. The crankshaft is the critical part, acting like a big hook that converts the piston's up-and-down motion into rotational force for the wheels. The connecting rod links the crankshaft at one end and the piston at the other, transmitting power. The piston moves up and down inside the cylinder to compress the fuel-air mixture. The piston pin secures the piston and connecting rod to prevent looseness. Bearings reduce friction and noise—especially the connecting rod bearings; if they wear out, the car will squeak while driving. During maintenance, I always remind customers not to skip oil changes. Proper bearing lubrication ensures smooth engine operation, and fewer faults mean saving on repair costs. While the overall structure may seem simple, any component failure can cause stalling or shaking. Regular inspections are essential for safe driving—don't wait until a major overhaul to regret neglecting them.
