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10
2024
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09
How does the engine valve work?
The working principle of the motive valve is to accurately control the opening and closing of the valve through the linkage of the crankshaft, piston and camshaft, so as to realize the normal operation of the engine.
The working principle of the engine valve can be summarized as the following key parts: The linkage of the crankshaft, piston and camshaft: When the crankshaft rotates, it drives the piston to reciprocate up and down in the cylinder. At the same time, the camshaft is connected to the crankshaft through a chain or belt, and rotates with the rotation of the crankshaft.
The role of the camshaft: The camshaft is equipped with cams. The shape of these cams is designed so that they can press the valve to control the opening and closing of the valve. When the convex part of the cam pushes up the valve, the valve opens; when the convex part of the cam leaves the valve, the valve closes under the action of the spring. 】Valve drive components: Valve drive components include camshafts, tappets, push rods, rocker arms and other components. The rotation of the camshaft is transmitted to the rocker arm through the tappet and the push rod, and the rocker arm pushes the valve to open or close through its leverage.
The function of intake valve and exhaust valve: The valve in the engine is divided into intake valve and exhaust valve. The intake valve is responsible for drawing air into the engine and mixing it with fuel for combustion; the exhaust valve is responsible for discharging the burned exhaust gas and helping to dissipate heat.
The application of multi-valve technology: In order to improve the efficiency of intake and exhaust, modern engines mostly use multi-valve technology, that is, each cylinder is arranged with multiple valves. The common design is 4 valves per cylinder. This design can increase the intake Air volume and exhaust volume improve the performance of the engine.
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