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The crankshaft makes one revolution, the camshaft makes a few revolutions

by:Yisheng      2021-06-10

Everyone knows that a car is made up of countless parts. It is because of the close cooperation of these parts that the normal driving of the vehicle can be guaranteed. Recently, someone asked, the crankshaft rotates one turn and the camshaft rotates several times. Let's talk about this problem.

The normal operation of the engine relies on the precise timing of the various components. For example, the timing of each valve opening and closing time and the ignition timing of the spark plug are determined by the timing of the engine. The system is guaranteed.

The timing system is actually very simple. In a four-stroke engine, the crankshaft completes a complete cylinder cycle every 2 revolutions. Therefore, the most basic timing system is to drive the valve on the camshaft and on the crankshaft. There is a gear with a gear ratio of 2:1, so that after the two are connected mechanically, the camshaft will make one revolution for every two revolutions of the crankshaft, and each valve will act exactly once.

Of course, in addition to the gear ratio of these two gears, their angular relative positions must also be very strict, so as to ensure that the valve is not only opened and closed once every two revolutions of the crankshaft, but also The time that the piston moves to the proper position can be opened and closed.

The difference and function of crankshaft and camshaft

Shaft: It is a part with a little S-shaped connection. The piston connecting rod drives the piston to move up and down to drive the crankshaft to rotate, thereby converting the reciprocating movement of the piston into the rotational movement of the crankshaft, and converting the original translational movement of the piston into the crankshaft The rotation of the engine, thereby outputting the power of the engine.

The role of the crankshaft: it converts the reciprocating linear motion of the piston into its own rotary motion to output power to the outside.

Camshaft: It is a shaft with a protrusion on it. The protruding part is used to push the valve. The Engine Camshaft For Mercedes Benz pushes the intake and exhaust valves of the cylinder to control the opening and closing of the valve to achieve driving. Valve.

The role of the camshaft: to open the intake and exhaust valves regularly.

So, is the car's camshaft driving the crankshaft to rotate, or does the crankshaft driving the camshaft to rotate?

Of course, the crankshaft drives the camshaft to rotate, that is Drives the valve mechanism. Because the intake and exhaust valves are opened once in a working cycle, the transmission ratio is two to one. The crankshaft makes two revolutions and the camshaft makes one revolution.

Okay, about the crankshaft making one revolution and the camshaft making a few revolutions, I have already explained it clearly for everyone. The crankshaft makes one revolution and the camshaft makes a half revolution.

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