What are the main components of the piston connecting rod assembly?
2 Answers
The piston connecting rod assembly mainly consists of the piston, piston rings, piston pin, connecting rod, and connecting rod bearing shells. The piston connecting rod assembly 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 serves as the transmission component of the engine, transferring the pressure of the combustion gases to the crankshaft, causing the crankshaft to rotate and output power. Additional information: 1. The function of the piston. The primary role of the piston is to withstand the gas pressure in the cylinder and transmit this force to the connecting rod via the piston pin to drive the crankshaft's rotation. It transfers the pressure of the combustion gases to the crankshaft, enabling the crankshaft to rotate and output power. The top of the piston, together with the cylinder head and cylinder wall, forms the combustion chamber. 2. The composition of the piston. The piston is mainly composed of the top, head, and skirt. The shape of the piston top is related to the selected combustion chamber. Gasoline engine pistons typically feature a flat-top head, which offers the advantages of a small heat absorption area and simple manufacturing processes. Some pistons use a concave top to alter mixture formation, with the size of the concave area also adjustable to regulate the engine's compression ratio.
Speaking of the piston connecting rod assembly, from my perspective, it mainly consists of key components such as the piston, piston rings, piston pin, and connecting rod. The piston slides up and down within the cylinder, enduring combustion pressure. The piston rings, mounted on the piston, serve a sealing function to prevent gas leakage and oil blow-by. The piston pin acts like a small joint, connecting the piston to the small end of the connecting rod. The big end of the connecting rod links to the crankshaft, converting the piston's linear motion into the rotational force of the crankshaft. These components must work in harmony under high-temperature and high-pressure conditions. If the piston rings wear out, it can lead to oil burning issues. Connecting rod deformation often occurs due to overspeeding or insufficient lubrication, potentially causing abnormal noises or even major engine overhauls. Regular engine inspections, timely oil changes, and avoiding frequent sudden acceleration can all extend service life, as this small structure significantly impacts overall performance and fuel efficiency.
