What is the function of the crankshaft?

[LaAyla]

The function of the crankshaft is to convert the reciprocating linear motion of the pistons into its own rotational motion to output power externally. The crankshaft is a crucial component in the engine, which bears the force transmitted from the connecting rods and converts it into torque. This torque is then output through the crankshaft to drive other auxiliary components of the engine. To reduce the mass of the crankshaft and the centrifugal force generated during operation, the crankshaft journals are usually made hollow. Oil holes are drilled on the surface of each journal to allow the introduction or extraction of engine oil for lubricating the journal surfaces. To minimize stress concentration, the connections between the main journals, crankpins, and crank arms are all transitioned with smooth arcs.

[Timothy]

The crankshaft is essentially a converter, transforming the up-and-down motion energy of the pistons in the engine into rotational force, which makes the car move. Think about it, the pistons move up and down in the cylinders, all connected by the crankshaft. Each explosion pushes it to rotate once, and this rotational force is transmitted to the transmission and rear wheels, making the car move. Maintaining the crankshaft is crucial; the material must be strong enough, otherwise, it can easily wear out or break under high speeds, causing the engine to shake. I've worked on car modifications before, replacing the crankshaft with a forged one to improve acceleration performance, but it requires regular lubrication checks to prevent metal fatigue from causing major issues, which could render the entire engine useless. In short, it's the heart of the engine; without it, the car is just for display.

[NolanRose]

The crankshaft is absolutely crucial inside the engine. When the pistons move up and down, it's the crankshaft that converts that linear motion into rotational force to transmit power. Having driven vintage cars for over a decade, I know every ignition starts with the crankshaft spinning the flywheel first. If you feel excessive engine vibration, it's likely due to crankshaft imbalance or severe bearing wear. Always opt for high-quality alloy materials during repairs for better durability and to avoid roadside breakdowns. Regular oil changes to maintain lubrication also extend its lifespan. Plus, during high-speed driving, excessive crankshaft RPM generates heat - make sure the cooling system works efficiently, otherwise power output drops significantly, affecting both fuel economy and safety.

[DiMartin]

The crankshaft is essentially the converter inside the engine. When the pistons move and it rotates, the car can move forward. When I was younger and driving, I once experienced a crankshaft failure—the car shook like a sieve and could only crawl at low speeds. Regular maintenance is crucial; change the oil and check for wear—don't skimp on small expenses.