What are the two major mechanisms of an engine?

[BriannaDella]

The two major mechanisms of an engine are the valve train mechanism and the crankshaft connecting rod mechanism. Below are the relevant introductions about these two mechanisms: Function of the valve train mechanism: According to the working cycle and firing sequence requirements of each cylinder in the engine, it timely opens and closes the intake and exhaust valves of each cylinder, allowing fresh charge to enter the cylinder promptly and exhaust gases to be expelled from the cylinder in time. During the compression and expansion strokes, it ensures the sealing of the combustion chamber. Function of the crankshaft connecting rod mechanism: It provides a place for combustion, converts the expansion pressure of the gas generated after fuel combustion acting on the top of the piston into the rotational torque of the crankshaft, transforms the thermal energy released after fuel combustion into mechanical energy, and continuously outputs power.

[GeorgeDella]

With my extensive experience in car repairs, I have a deep understanding of engine structures. The two core mechanisms are the crankshaft connecting rod mechanism and the valve train mechanism. The crankshaft connecting rod mechanism primarily converts the up-and-down motion of the pistons into rotational motion, which is essential for generating power to drive the car forward. The valve train mechanism, on the other hand, controls the opening and closing of the intake and exhaust valves via the camshaft, ensuring proper air and fuel flow in and out of the cylinders. When these two mechanisms work in harmony, the engine operates efficiently and economically. If they become unbalanced or worn out, the car may experience shaking, excessive noise, or reduced power, necessitating timely maintenance or part replacement. Overall, these mechanisms ensure smooth engine operation, making driving safer and more stable. I recommend regular checks on the lubrication of the crankshaft connecting rod and the valve timing to prevent major issues.

[DelEvelyn]

From my own driving experience, the operation of an engine relies on two major mechanisms—the crankshaft connecting rod mechanism and the valve train. The former converts the reciprocating motion of the pistons into the rotation of the wheels, acting like the heart of the engine; the latter controls the airflow in and out, affecting combustion efficiency. If these components develop minor issues, such as a deformed connecting rod or stuck valves, the car may become sluggish during acceleration or consume more fuel. When driving a regular car, I make sure to maintain these two areas regularly, which can extend the engine's lifespan and prevent breakdowns on the road. Simply put, these are the power sources—keeping them well-maintained ensures smooth operation.

[DeSophia]

In my driving career, the core mechanisms of an engine boil down to just two: the crank connecting rod and the valve train. The crank connecting rod converts piston kinetic energy into wheel rotational force, while the valve train controls intake and exhaust timing to ensure proper combustion chamber operation. Neglecting maintenance can easily lead to abnormal noises or insufficient power issues. Keeping these two in good condition ensures the engine runs like new.