What role does the crankshaft play in the car?

The crankshaft is an important component of an automobile engine. Its function is to convert the gas force transmitted from the piston and connecting rod into torque, and convert the linear motion of the piston into rotary motion. It is used to drive the transmission system of the automobile, the valve train of the engine, and other auxiliary devices.

The function of crankshaft counterweight (also known as counterweight) is to balance the rotating centrifugal force and its torque, and sometimes it can also balance the reciprocating inertial force and its torque. When these forces and moments balance themselves, the counterweight can also be used to reduce the load on the main bearing.

The number, size, and placement position of the counterweight should be considered based on factors such as the number of cylinders in the engine, the arrangement of the cylinders, and the shape of the crankshaft. The counterweight is generally cast or forged into a whole with the crankshaft. The counterweight for high-power diesel engines is manufactured separately from the crankshaft and then connected together with bolts.